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    • 专利摘要:
    Windscreen wiper blade in particular for a motor vehicle. To minimize operating noise, the wiper blade comprises an elastomer (A) containing at least one ethylene-propylene-diene-EPDM rubber and / or at least one ethylene-propylene rubber and at least one plasticizing oil having a point d. 'flow in a range> -25 ° C to <+ 25 ° C. The subject of the invention is also such an elastomer (A) and a wiper equipped with such a wiping blade.
    公开号:BE1022457B1
    申请号:E2014/0064
    申请日:2014-02-05
    公开日:2016-04-06
    发明作者:Valérie Carlier；Nicolaas Gotzen；Vincent Duval；Eric Pieters；Reiner Lay
    申请人:Robert Bosch Gmbh；
    IPC主号:
    专利说明:

    "Wiper blade and wiper equipped with this"
    Field of the invention
    The present invention relates to a wiper blade, in particular for a windscreen wiper and an elastomer for such a blade and such a wiper.
    State of the art
    The wipers wiper blades are used to clean the glass in case of moisture to have good visibility. In addition to the wiping quality intrinsically achieved by the wiper blade, in the case of wiper blade wipers, other requirements such as operating characteristics, noise and . For example, current wiper blades can generate unpleasant noises during wiping operation such as hissing, squeaking, crushing noises, or crouching noises or the like.
    DE 199 44 274 A1, WO 2009/130081 A1, DE 10 2009 001 043 A1 disclose wiper blade wiper blades.
    Description and advantages of the invention
    The subject of the present invention is a wiper blade, in particular a wiper blade, comprising an elastomeric material containing at least one ethylene-propylene-rubber diene and / or at least one ethylene-propylene rubber and at least one plasticizing oil having a pour point in the range> -25 ° C to <+ 25 ° C.
    The wiper blade, in particular for a vehicle wiper, comprises an elastomeric material that contains at least one ethylene-propylene-diene rubber EPDM and / or at least one ethylene-propylene rubber.
    In particular, the elastomer further contains at least one plasticizing oil having a pour point in a range of from -25 ° C to <+ 25 ° C.
    The pour point is defined by DIN 51597 for a liquid product thus giving the temperature at which the cooled product is still likely to flow.
    It has been found that, for example, when using elastomers based on ethylene-propylene-diene EPDM rubber, in particular ethylene-propylene-diene pure EPDM rubber that is to say not mixed with d other polymers which do not contain a plasticizing oil having a pour point in the range of -25 ° C to <+ 25 ° C, and, for example, a plasticizing oil having a lower pour point Although the wiper blade has a good wiper quality, this blade can generate strong operating noises, whistling, crushing, mixing and tipping noises.
    It has been found that such operating noises can, however, be greatly reduced or eliminated if the plastic material comprising an elastomer is added to the material constituting a pour point and, if appropriate, to a setting point within a range of > - 25 ° C to <+ 25 ° C.
    Probably the effect of noise reduction is that for such a pour point the plasticizing oil provides an induced damping effect in the elastomer. It was found that the noise reduction effect depended on the pour point. In order to have a noise-reducing effect, it has proved advantageous to use a plasticizing oil with a pour point and if necessary also a setting point of at least> -25 ° C., for example> -15 ° C. or > - 10 ° C or> - 5 ° C. Furthermore it has been found that other properties of circulation of the wiper blade and also its cold flexibility depended on the pour point of the plasticizing oil. This is why it is advantageous for the plasticizing oil to have a pour point and, where appropriate, also a freezing point which is <+ 25 ° C, for example <+ 20 ° C or <+ 15 ° C or <+ 10 ° C or <+ 5 ° C. The plasticizing oil is in particular a paraffin oil or a naphthenic oil or an aromatic oil, for example a mineral oil, a synthetic oil, a natural oil or a mixture of oils. For example, the plasticizing oil is a mineral oil. In particular, the plasticizing oil is a paraffin oil, for example a very refined paraffin mineral oil. For example, the plasticizing oil is a very refined paraffin mineral oil, purified by catalytic hydrogenation. In particular, the plasticizing oil corresponds to the EU Directive 2005/69 / EC.
    In particular, the elastomer may contain a plasticizing oil having a pour point in a range of> -15 ° C or> -10 ° C or> -5 ° C or> -0 ° C up to <+ 25 ° C or <+ 20 ° C or <+ 15 ° C or <+ 10 ° C or <+ 5 ° C.
    If necessary, the plasticizing oil has a pour point as indicated above and a freezing point in a range from -25 ° C to + 25 ° C, and in particular> -15 ° C or> -10 ° C or> -5 ° C or> -0 ° C to <+ 25 ° C or <+ 20 ° C or <+ 15 ° C or <+ 10 ° C or <+ 5 ° C it is also possible that the plasticizing oil has a pour point and a point of freezing as defined above and which are slightly higher than the usual range since the point of freezing is generally a few degrees below above the pour point.
    The freezing point is defined by DIN EN 23015 (formerly DIN 51583), which is the temperature at which the sample stops flowing and freezes without any movement for 10 seconds.
    According to another development, the elastomer contains, by weight of plasticizers, weight parts of plasticizing oil of> 5 parts by weight and <80 parts by weight with one of the pour points mentioned above (and where appropriate also the point of freezing). This choice proved to be advantageous for the working possibility and the circulation properties.
    In particular, the elastomer contains, per 100 parts by weight of polymer> 5 parts by weight and <50 parts by weight for example> 10 parts by weight up to <45 parts by weight of plasticizing oil having a pour point as defined above (and if necessary also a freezing point). This results in a particular advantage of reducing operating noise. The expression "per 100 parts by weight of polymer (s)" means in particular 100 parts by weight of all the polymers contained in the polymer, these weighting parts being added, that is to say being considered in their entirety. In addition to at least one plasticizing oil having the pour point defined above (and optionally the point of freezing), the elastomeric material may also contain one or more other plasticizing oils. Preferably, however, the content of the plasticizing oil is less than or equal to the content of other plasticizing oils, while being less than or equal to the level of the content of the plasticizing oil with one of the pour points mentioned above. -above. Inasmuch as other plasticizing oils are provided, it is advantageous for the elastomer to contain, per 100 weight parts of polymer, in all> 5 parts by weight and <80 parts by weight of plasticizing oils, for example plasticizing oils having a pour point as indicated above (and possibly also a point of freezing) as well as other plasticizing oils for the whole.
    According to another development, the elastomer contains carbon black. The elastomer may for example contain, per 100 parts by weight of polymers,> 20 parts by weight up to <120 parts by weight of carbon black.
    It has been found that a carbon black content of> 20 parts by weight per 100 parts by weight of polymer advantageously makes it possible to obtain good abrasion resistance. At the same time, to guarantee a good working characteristic, it is advantageous not to adjust the carbon black content to such a high level. To some extent compatibility with the high amounts of carbon black can be adjusted by the addition of plasticizing oil. From the point of view of the noise-reducing effect and the dynamic properties or operating properties of the rubber blade, it has been found advantageous to have, per 100 weight parts of polymer, a maximum of <120 parts by weight of carbon black as described more precisely above and <80 parts by weight of plasticizing oil.
    According to another development, the elastomer contains, per 100 parts by weight of polymers, carbon black in a range of from> 25 parts by weight to <95 parts by weight. In particular, for 100 parts by weight of polymer, the elastomer may contain carbon black with a weight content of> 30 parts by weight or> 90 parts by weight up to <90 parts by weight or <85 parts by weight or <80 parts by weight or <75 parts by weight parts by weight. Such carbon black contents are particularly advantageous from the point of view of abrasion resistance and machinability. In addition, such carbon black contents have proved particularly advantageous in the direction of noise reduction to a minimum.
    According to another development, the weight ratio of carbon black and at least one plasticizing oil with a pour point as indicated above is in a range from 90:10 to 50:50, especially in a range from 80:20 to 65:35. These proportions have proved to be particularly advantageous for working capacity and in particular for achieving good operating properties and less operating noise or no noise.
    For example, the elastomer may comprise two or more ethylene-propylene-diene rubbers (different) and / or ethylene-propylene rubbers (different) for example having different ethylene and / or propylene contents. and / or in termonomers and / or in different termonomers, for example chosen from the group comprising the following compounds: ethylidene-norbornene (ENB), vinyl-norbornene (VNB), dicyclopentadiene (DCP), 1,4-hexadiene and their mixtures
    Where appropriate, the elastomer is constituted by at least one ethylene-propylene-rubber diene and / or at least one ethylene-propylene rubber. The expression "made with" means in this context that the elastomer does not contain other polymers but may contain other materials such as additives such as plasticizing oils.
    According to another development, the elastomer is at least one ethylene-propylene-diene-rubber. The ethylene-propylene-diene-EPDM rubber advantageously allows to have a higher degree of crosslinking. In addition, EPDM ethylene-propylene-diene rubbers can be advantageously cross-linked with both peroxides and with sulfur and will have a good working characteristic. Where appropriate, the elastomer is constituted by at least one ethylene-propylene-rubber diene.
    According to another development, the elastomer contains a mixture of polymers including at least one ethylene-propylene-diene rubber and / or ethylene-propylene rubber and in particular at least one ethylene-propylene-rubber diene and at least one other polymer (different) . The expression "polymer mixture" denotes, in particular, a macroscopically homogeneous mixture of two or more different polymers.
    According to a development of this embodiment, the elastomer contains a polymer mixture comprising at least one ethylene-propylene-rubber diene and / or at least one ethylene-propylene rubber, especially at least one ethylene-propylene-diene-rubber and at least one minus another polymer chosen from the group comprising the following polymers: ethylene-vinyl acetate copolymer (EVM), polynorbornene (NOR), trans-polyoctenamer (TOR), polyisobutylene (PIB), chloroprene rubber (CR), butyl rubber (IIR), chlorobutyl rubber (CIIR), bromobutyl rubber (BIIR) and their mixtures (polymer blend EP (D) M-EVM / NOR / TOR / PIB / CR / IIR / CIIR / BIIR).
    It has been found that it is advantageous to reduce the operating noise even further by using an elastomer based on a polymer mixture comprising at least one ethylene-propylene-rubber diene (EPDM) and / or at least one ethylene. polypropylene rubber and at least one other polymer from the group comprising the following polymers: ethylene-vinyl acetate copolymer, polynorbornene, trans-polyoctenamer, polyisobutylene, chloroprene rubber, butyl rubber, chlorobutyl rubber and bromobutyl rubber.
    This probably results from the fact that an ethylene vinyl acetate copolymer, a polynorbornene, a trans-polyoctenamer, a polyisobutylene, a chloroprene rubber, a butyl rubber, a chlorobutyl rubber and / or a bromobutyl rubber, induces a kind of damping in the elastomer which reduces the noise accordingly.
    Alternatively or additionally, two or more ethylene-propylene-diene rubbers and / or ethylene-propylene rubbers, the polymer blend may contain two or more other polymeric types selected from group comprising the following polymers: ethylene-vinyl acetate copolymer, polynorbornene, trans-polyoctenamer, polyisobutylene, chloroprene rubber, butyl rubber, chlorobutyl rubber and bromobutyl rubber, and, where appropriate, at least two different polymers of the same type selected from the group consisting of the following polymers: ethylene vinyl acetate copolymer, polynorbornene, trans-polyoctenamer, polyisobutylene, chloroprene rubber, butyl rubber, chlorobutyl rubber and / or bromobutyl rubber. For example, there may be two or more ethylene-vinyl acetate copolymers which differ in different contents of vinyl acetate and / or ethylene radicals. In addition to ethylene-propylene-diene rubbers and / or ethylene-propylene rubbers and at least one other polymer of the group defined above, the polymer blend may in principle also comprise one or more other polymers.
    However, it is also possible to produce the polymer mixture from ethylene-propylene-diene rubbers and / or ethylene-propylene rubbers and at least one other polymer of the group defined above.
    According to another development, the elastomer contains a polymer mixture containing at least one ethylene-propylene-rubber diene and / or at least one ethylene-propylene rubber and at least one ethylene-vinyl acetate copolymer (EP (D) M-EVM).
    The polymer mixture may be a mixture which may contain or consist of at least one ethylene-propylene-rubber diene and / or at least one ethylene-propylene rubber and at least one ethylene-vinyl acetate copolymer (EP (D) M-EVM) or may be contain or consist of at least one ethylene-propylene-rubber diene and at least one ethylene-vinyl acetate copolymer (EPDM-EVM polymer blend) or which may contain or consist of at least one ethylene-propylene-rubber diene and at least one ethylene-vinyl acetate copolymer (EPM-EVM polymer blend).
    For example, the polymer mixture may contain at least one ethylene-propylene-rubber diene and at least one ethylene-vinyl acetate copolymer or be formed by such polymers.
    For example, the polymer blend may contain at least one ethylene-vinyl acetate copolymer having a vinyl acetate content in a weight range of> 45% by weight to <85% by weight based on the total weight of the ethylene-vinyl acetate copolymer. Such vinyl acetate contents have been found to be advantageous in minimizing operating noise. The noise reduction effect is probably based on the fact that the ethylene-vinyl acetate copolymer induces a kind of damping in the elastomer. It has been found that the noise reduction effect is dependent on the vinyl acetate content of the ethylene-vinyl acetate copolymer. To achieve this effect of noise reduction it has proved interesting that the ethylene-vinyl acetate copolymer has a content> 45% by weight based on the total weight of the ethylene-vinyl acetate copolymer. On the other hand, it has been found that the vinyl acetate content of the ethylene-vinyl acetate copolymer also acts on the cold flexibility and operating properties of the wiper blade. For cold flexibility and operating properties it has been found advantageous that the vinyl acetate content of the ethylene-vinyl acetate copolymer is <85% by weight based on the total weight of ethylene-vinyl acetate copolymer.
    In particular, the polymer mixture contains at least one ethylene-vinyl acetate copolymer with a vinyl acetate content in a range of> 45% by weight up to <85% by weight, in particular> 50% by weight up to <85% by weight or <80% by weight for example> 55% by weight or> 60% by weight up to <85% by weight or <80% by weight or <75% by weight, based on the total weight of ethylene-vinylacetate copolymer. Such vinyl acetate contents have proved particularly advantageous from the point of view of the noise reduction effect and the cold flexibility and also the operating properties of the wiper blade.
    Since the polymer blend contains ethylene-vinyl acetate copolymers with different levels of vinyl acetate, all ethylene-vinyl acetate copolymers may have a vinyl acetate content within the range described above. In addition to ethylene-propylene-diene-rubbers and ethylene-vinyl acetate copolymers, the ethylene-propylene-diene-rubber-ethylene-vinyl acetate copolymer mixture may in principle also contain one or more other polymers, for example chosen from the group consisting of following polymers: polynorbornene (NOR), trans-polyoctenamer (TOR), polyisobutylene (PIB), chloroprene rubber (CR), butyl rubber (IRR), chlorobutyl rubber (CIIR), bromobutyl rubber (BIIR) and mixtures thereof.
    It is also possible that the polymer mixture is composed of ethylene-propylene-diene rubber (s) and / or ethylene propylene rubber (s) and / or copolymer (s) ethylene-vinyl acetate.
    The polymer mixture may contain, for example, relative to the total weight of the polymers in the polymer mixture, from> 10% by weight up to <95% by weight for example> 30% by weight up to <80 by weight of ethylene-propylene -diene rubber and / or ethylene-propylene rubber (in sum) including ethylene-propylene-diene rubber (sum). Based on the total weight of polymers in the polymer mixture, this mixture may, for example, contain an ethylene-vinyl acetate copolymer, for example in percentage by weight> 5% up to <90% in particular> 20% up to <70% (additional content or corresponding to the totality). The weight ratio between the ethylene-propylene-diene rubbers and / or the ethylene-propylene rubbers (in their sum) in particular ethylene-propylene-diene-rubber (taken in sum) with respect to the ethylene-vinyl acetate copolymer (taken in sum) in the polymer mixture will for example be in a range such as 90:10 to 5:95, and for example in a range of 70:30 to 20:80.
    The polymer mixture may relate to the total weight of the polymers in the mixture contain in particular from> 30% to <60% by weight of ethylene-vinyl acetate copolymer (in full). In particular, the polymer blend, based on the total weight of polymers in the blend, contains from> 35% to <55% by weight of ethylene-vinyl acetate copolymer (in total). This has proved particularly advantageous among other things to ensure good interaction of the phases.
    In particular, the polymer mixture contains, relative to the total weight of polymers in the mixture, between from> 40% by weight to <70% by weight for example from> 45% by weight to <65% by weight of ethylene-propylene-diene rubber and / or ethylene-propylene rubber (in total) including ethylene-propylene-diene-rubber (in total).
    The weight ratio of ethylene-propylene-rubber diene and / or ethylene-propylene rubber (in total) especially ethylene-propylene-diene-rubber (in total) relative to the ethylene-vinyl acetate copolymer (in total) in for example, the polymer mixture may range from 70:30 to 40:60. In particular, the weight ratio of ethylene-propylene-rubber diene and / or ethylene-propylene rubber (in total) especially of ethylene-propylene-diene-rubber (in total) relative to the ethylene-vinyl acetate copolymer (in totality). ) in the polymer mixture is for example in a range between 65:35 to 45:55. Such weight ratios have proved particularly advantageous, in particular to guarantee good phase interaction.
    According to another development, the elastomer contains a polymer mixture containing at least one ethylene-propylene-rubber diene and / or at least one ethylene-propylene rubber, in particular at least one ethylene-propylene-diene-rubber and at least one other chosen polymer. in the group comprising the following polymers: polynorbornene (NOR), trans-polyoctenamer (TOR), polyisobutylene (PIB), chloroprene rubber (CR), butyl rubber (IIR), chlorobutyl rubber (CIIR), bromobutyl rubber (BIIR) and their mixtures (EP (D) M-EVM / NOR / TOR / PIB / CR / IIR / CIIR / BIIR).
    The polymer mixture is, for example, a mixture which contains or consists of at least one ethylene propylene rubber diene and / or at least one ethylene propylene rubber and another polymer chosen from the group comprising the following polymers: polynorbornene, trans-polyoctenamer, polyisobutylene, chloroprene rubber, butyl rubber, chlorobutyl rubber, bromobutyl rubber and mixtures thereof (EP (D) M-EVM / NOR / TOR / PIB / CR / IIR / CIIR / BIIR) or which contains or consists of at least one ethylene propylene-diene-rubber and at least one polymer of this group (EPDM-EVM / NOR / TOR / PIB / CR / IIR / CIIR / BIIR) or which contains or consists of at least one ethylene-propylene-diene rubber and at least one polymer of this group (EPM-EVM / NOR / TOR / PIB / CR / IIR / CIIR / BIIR). In addition to an ethylene-propylene-rubber diene and / or an ethylene-propylene rubber and at least one polymer of the group formed by the following polymers: polynorbornene (NOR), trans-polyoctenamer (TOR), polyisobutylene ( PIB), chloroprene rubber (CR), butyl rubber (IIR), chlorobutyl rubber (CIIR), bromobutyl rubber (BIIR), and mixtures thereof, the polymer blend may further contain at least one or more other polymers, for example an ethylene- vinyl acetate.
    For example, the polymer mixture contains or consists of at least one ethylene-propylene-rubber diene and / or at least one ethylene-propylene rubber, in particular at least one ethylene-propylene-rubber diene and at least one polymer from the group formed by the following polymers: polynorbornene (NOR), trans-polyoctenamer (TOR), polyisobutylene (PIB), chloroprene rubber (CR), butyl rubber (IIR), chlorobutyl rubber (CIIR), bromobutyl rubber (BIIR) and their mixtures (EP ( D) M- / NOR / TOR / PIB / CR / IIR / CIIR / BIIR-EVM).
    It is also possible that the polymer blend is composed of ethylene-propylene-rubber diene and / or ethylene-propylene rubber and at least one polymer selected from the group consisting of the following polymers: polynorbornene (NOR), trans-polyoctenamer (TOR), polyisobutylene (PIB), chloroprene rubber (CR), butyl rubber (HR), chlorobutyl rubber (CIIR), bromobutyl rubber (BIIR) and mixtures thereof.
    For example, the polymer mixture is a mixture of ethylene-propylene-diene-rubber EPDM and at least one polymer selected from the group consisting of the following polymers: polynorbornene (NOR), trans-polyoctenamer (TOR), polyisobutylene ( PIB), chloroprene rubber (CR), butyl rubber (IIR), chlorobutyl rubber (CIIR), bromobutyl rubber (BIIR) and mixtures thereof. Where appropriate, the polymer mixture is a mixture which contains at least one ethylene-propylene-diene-EPDM rubber and at least one polymer selected from the group consisting of the following polymers: polynorbornene (NOR), trans-polyoctenamer (TOR), polyisobutylene (PIB), chloroprene rubber (CR), butyl rubber (IIR), chlorobutyl rubber (CIIR), bromobutyl rubber (BIIR) and mixtures thereof.
    It has been found that it is advantageous to have a noise reduction effect already for small amounts of another polymer. However, it has been found that the quantity of this other polymer should not be too great because it would reduce the advantageous properties of ethylene-propylene-rubber diene and / or ethylene-propylene rubber, in particular the good quality of wiping. and where appropriate one could even have unwanted effects generated by this other polymer.
    For an excessively high content of polynorbornene or rubber chloroprene, the elastomer becomes too hard and its modulus of elasticity E is too high. This can be remedied to some extent by decreasing the crosslinking agent. Another aspect is the heat resistance which is still good enough for a high trans-polyoctenamer or chloroprene rubber content but may deteriorate with increasing polynorbornene content. For an excessively high content of rubber chloroprene, there is also an unpleasant odor.
    For an excessively high content of polyisobutylene, butyl rubber, chlorobutyl rubber or bromobutyl rubber, the elastomer may become too soft and its modulus of elasticity E decreases. This can in particular come from a poor crosslinking property. The resistance to heat may nevertheless remain sufficient. Too high a content of chlorobutyl or bromobutyl rubber can generate an unpleasant odor.
    The combination of two or more of the above polymers, in particular with opposite effects, advantageously balances these effects.
    In order to have a wiping blade having a wiping quality and acceptable operating properties and which nevertheless does not generate operating noise such as hissing, squealing, chattering, kneading or tipping noises etc., it It is advantageous if the weight ratio of the ethylene-propylene-rubber diene and / or the ethylene-propylene rubber relative to the other polymer, especially the total weight of this other polymer, is in a range between 40:60. up to 95: 5 and that the content of this polymer, that is to say in the case of several polymers the total weight of these polymers relative to ethylene-propylene-diene rubber and / or ethylene polypropylene rubber is> 5% by weight and at most <60% by weight based on the total weight of the polymers in the mixture. Thus, it is advantageous to provide a wiper blade having good wiping qualities and good operating properties while generating substantially no operating noises such as whistling, squealing, kneading or tipping noises or the like. .
    In particular, in the polymer blend, the weight ratio of ethylene-propylene-rubber diene and / or ethylene-propylene rubber (in total) especially ethylene-propylene-rubber diene (in total) by relative to the other polymer, especially the total weight of this other polymer is in a range of 40:60 to 95: 5. In particular polymers, in the polymer blend the weight ratio of ethylene-propylene-rubber diene and / or ethylene-propylene rubber (in total) including ethylene-propylene-diene-rubber (in total) by relative to the other polymer in particular the total weight of this polymer is in a range of 45:55 or 50:50 or 55:45 or 60:40 or 70:30 up to 95: 5 or 90:10 or 85:15 or 82:20.
    According to one particular development, in the polymer mixture the weight ratio of ethylene-propylene-rubber diene and / or ethylene-propylene rubber (in total) in particular of ethylene-propylene-diene-rubber (in total) relative to the other polymer in particular the total weight of this polymer is in a range of 50:50 up to 95: 5 or 90:10. These reports have proved particularly advantageous.
    The polymer mixture may contain, based on the total weight of polymers in the mixture, a polymer which represents in all a weight ratio such that> 5% by weight up to <60% by weight. The polymer mixture based on the total weight of polymers in the mixture contains in particular a percentage by weight such that> 40% by weight up to <95% by weight of ethylene-propylene-diene rubber and / or ethylene-propylene rubber (in total ), especially ethylene-propylene-diene-rubber (in total) (the expression "% pond" means% by weight).
    For example, the polymer blend based on the total weight of polymers in the blend contains weight percentages of the other polymer (in total) such as> 5% by weight or> 10% by weight or> 15% by weight or> 20% by weight. 'at <55% weight or <50% weight or <45% weight or <40% weight or <30% weight. The polymer mixture based on the total weight of the polymers in the mixture contains ethylene-propylene-rubber diene and / or ethylene-propylene rubber in a weight ratio such that> 45% by weight or> 50% by weight or> 55 % pond or> 60% pond or> 70% pond up to <95% pond or <90% pond or <85% pond or <80%.
    In particular, the polymer mixture based on the total weight of polymers in the mixture contains for at least one polymer (in total) a weight ratio such that> 5% by weight or> 10% by weight up to <50% by weight. The polymer blend based on the total weight of the polymers in the polymer blend may contain ethylene-propylene-rubber diene and / or ethylene-propylene rubber in a weight ratio such that> 50% pond up to <95 % pond or <90% pond (in full) and especially ethylene-propylene-diene-rubber (in full). For example, the polymer mixture based on the total weight of the polymers in the polymer mixture contains for the other polymer, a weight ratio such that> 5% by weight or> 10% by weight up to <50% by weight and for ethylene- propylene-rubber diene and / or ethylene-propylene rubber in whole, especially ethylene-propylene-diene-rubber (in whole) a weight ratio such that> 50% weight up to <95% by weight or <90% pond.
    According to one development, the other polymer is chosen from the group formed by the following polymers: polynorbomene (NOR), trans-polyoctenamer (TOR), polyisobutylene (PIB) or their mixtures. For example, the polymer may be a polynorbomene (NOR) and / or a trans-polyoctenamer (TOR) and / or a polyisobutylene (PIB). This has proven to be particularly advantageous.
    The polynorbomene may also be used alone or in the form of an oily mixture, for example a polynorbene / oil masterbatch, which is mixed with ethylene-propylene-diene rubber and / or ethylene-propylene rubber for form a polymer mixture.
    According to a particular development, the polynorbomene polymer is however a polynorbene / oil mixture. This has proved particularly advantageous for the treatment characteristics of polymer blends or elastomer. The oil of the polynorbomene / oil mixture can in particular be a plasticizing oil or a mixture of plasticizing oils. In particular, the plasticising oil of the polynorbene / oil mixture may also be characterized by a pour point> -25 ° C. to <+ 25 ° C., in particular> -15 ° C. or> -10 ° C. or - 5 ° C or> - 0 ° C to <+ 25 ° C or <+ 20 ° C or <+ 15 ° C or <+ 10 ° C or <+ 5 ° C. In particular, the oil of the polynorbornene / oil mixture may be the same oil as the plasticizing oil with a pour point in the range of -25 ° C to <+ 25 ° C. The addition of such a plasticizing oil further improves the advantageous operating and operating noise properties, in particular the plasticizing oil of the polynorbornene / oil mixture is a paraffinic, naphthenic or aromatic oil, for example a mineral oil, an oil synthetic, a natural oil or a mixture of such oils. For example, the plasticizing oil of the polynorbornene / oil mixture may be a mineral oil. In particular, the plasticizing oil of the polynorbornene / oil mixture may be a paraffin oil, for example a very refined paraffinic mineral oil. For example, the plasticizing oil of the polynorbornene / oil mixture may be a very refined paraffinic mineral oil by catalytic hydrogenation. In particular, the plasticizing oil of the polynorbornene / oil mixture can be an oil corresponding to the European Directive EU 2005/69 / EC.
    Where appropriate, the plasticizing oil of the polynorbornene / oil mixture has a freezing point such that> -25 ° C to <+ 25 ° C, in particular> -15 ° C or> -10 ° C or> - 5 ° C or> - 0 ° C to <+ 25 ° C or <+ 20 ° C or <+ 15 ° C or <+ 10 ° C or <+ 5 ° C. But it is also possible that the oil of the polynorbornene / oil mixture has a pour point or a point of freezing greater than the range mentioned above because the point of freezing is generally a few degrees above the point flow.
    In the polynorbornene / oil mixture, the weight ratio of the polynorbornene / oil polymer is in particular in a range such as 30:70 to 70:30.
    Insofar as the oil of the polynorbornene / oil mixture is used with in addition at least one plasticizing oil having a pour point in the range of -25 ° C to <+ 25 ° C, the elastomer mixture contains, per 100 parts by weight of polymers, preferably overall weight parts, plasticizing oils, in total, such as> 5 parts by weight up to <80 parts by weight, for example plasticizing oils having a pour point in a range> -25 ° C to <+ 25 ° C (and optionally also a setting point) and other plasticizing oils and optionally the oil of the polynorbornene / oil mixture taken in its entirety.
    According to one development, the polymer blend is an ethylene-propylene-diene-rubber EPDM polynorbornene (NOR) blend. In the polymer blend, the weight ratio of ethylene-propylene-diene-rubber to polynorbornene is, for example, in a range such as 50:50 or 55:45 or 60:40 to 95: 5 or 90:10.
    According to another development, the polymer mixture is an ethylene-propylene-diene-EPDM / trans-polyoctenamer (TOR) rubber mixture. In this polymer blend, the weight ratio of ethylene-propylene-diene-rubber and trans-polyoctenamer is, for example, in a range of 50:50 or 55:45 or 60:40 up to 95: 5 or 90 10.
    According to another development, the polymer blend is an ethylene-propylene-diene-EPDM / polyisobutylene rubber (PIB) blend. In this mixture of polymers, the weight ratio of ethylene-propylene-diene-rubber relative to polyisobutylene is for example in a range of 50:50 or 55:45 or 60:40 up to 95: 5 or 90:10 . In particular, the polyisobutylene has a molecular weight of between 20,000 g / mol and 5,000,000 g / mol. In particular, the polyisobutylene has a molecular weight> 100,000 g / mol. A high molecular weight, for example> 100,000 g / mol, advantageously improves the treatment characteristics.
    According to another development, the polyisobutylene has a molecular weight> 100,000 g / mol.
    In particular, oxidation-stabilized polyisobutylene may be used. To carry out such a stabilization is added for example per kilogram of polyisobutylene, a stabilizer / antioxidant in an amount such that> 100 mg / kg up to <1100 mg / kg, for example> 200 mg / kg to <800 mg / kg in particular> 300 mg / kg up to <700 mg / kg. As the stabilizer / antioxidant, non-bleaching stabilizers / antioxidants may be used, for example 2,6-di-tert-butyl-4-methylphenol (BHT).
    According to another development, the polymer blend is an ethylene-propylene-diene-rubber EPDM / chloroprene rubber (CR) blend. In the polymer blend, the weight ratio of ethylene-propylene-diene-rubber to rubber chloroprene is, for example, in the range of 50:50 or 55:45 or 60:40 to 95: 5 or 90: 10.
    According to another development, the polymer blend is an ethylene-propylene-diene-rubber EPDM / butyl rubber (IIR) and / or chlorobutyl rubber (CIIR) and / or bromobutyl rubber (BIIR) blend. The polymer blend may have a weight ratio of ethylene-propylene-diene-rubber to butyl rubber and / or chlorobutyl rubber and / or bromobutyl rubber (in total) for example in a range such as 50:50 or 55:45 or 60:40 up to 95: 5 or 90:10.
    In addition, the elastomer contains at least one lubricant especially chosen from the group consisting of the following compounds: graphite, polytetrafluoroethylene, molybdenum sulphide or mixtures thereof. For example, the elastomer may contain, per 100 parts by weight of polymer, weight parts of lubricating agents in the following ranges:> 1 part by weight up to <20 parts by weight, for example> 2 parts by weight up to <15 parts by weight weight parts in particular> 3 parts by weight up to <10 parts by weight.
    In addition, the elastomer comprises at least one crosslinking agent. The crosslinking agent is a crosslinking agent based on sulfur / peroxide. Preferably, the crosslinking agent is a crosslinking agent based on peroxide. In addition, the elastomer contains one or more crosslinking accelerators and / or sulfur and / or sulfur donor (s) and / or peroxide donor (s) and the case optionally a co-crosslinking agent. The elastomer may also comprise other additives such as, for example, plasticizers, white fillers, pigments, coloring agents, anti-degradants, activators such as, for example, zinc oxide, magnesium oxide. and / or stearic acid, treatment additives and / or moisture absorbers such as, for example, calcium oxide.
    In another development, the wiper blade has a wiper lip, a spacer, and a securing segment. The wiping lip is connected to the tilting spacer and the latter is connected to the attachment segment. The wiping lip has in particular a lip head and a lip tip. The head of the lip is connected to the tilting spacer.
    The wiper blade is partially or completely elastomeric.
    In particular, the wiping lip is partly elastomeric. Alternatively or in addition to the tilting spacer and / or fixing segment is elastomer.
    According to a development, the assembly of the wiper blade is an elastomer.
    According to another development, the wiper blade comprises for example a wiping lip in at least one other elastomer.
    This other elastomer is for example an elastomer having no plasticizing oil with a pour point in a range> -25 ° C to <+ 25 ° C and / or another ethylene-propylene-diene-rubber EPDM and / or another ethylene-propylene-diene-rubber polymer blend.
    This other elastomer is for example an elastomer containing another plasticizing oil or no plasticizing oil having a pour point in a range> -25 ° C to <+ 25 ° C and / or no ethylene-propylene -diene rubber and / or various ethylene-propylene-diene rubbers with, for example, different contents of ethylene and / or propylene and / or different contents of termonomer and / or termonomers, for example chosen from the group formed by the following compounds : ethylidene norbornene (ENB), vinyl norbornene (VNB), dicyclopentadiene (DCP), 1,4-hexadiene, and mixtures thereof and / or no ethylene-propylene-diene rubber or ethylene-propylene- different rubber diene for example with different contents of ethylene and / or propylene and / or a different mixture of polymers for example with different types of polymers or polymers and / or polymer contents.
    This other elastomer, which is different, may also contain carbon black, plasticizing oils, lubricating agents, crosslinking agents, crosslinking accelerators and / or sulfur and / or sulfur and / or peroxide contents, co-crosslinking agents and other additives such as other plasticizers, white fillers, pigments, coloring agents, anti-degradants, activators such as, for example, zinc oxide, magnesium oxide and / or stearic acid, process aids and / or moisture absorbers such as for example calcium oxide. For particular embodiments of this other elastomer, there is explicit reference to the relationship with elastomers containing plasticizing oils such as those described above.
    This other elastomer, which is different, can also be distinguished by additives and / or adjuvants and / or quantitative ratios.
    According to a development of the embodiment of the invention, the wiping lip is partially or completely made of an elastomer different from that of the tilting spacer and, if appropriate, the fixing segment. In particular, the tip of the wiping lip is made of an elastomer different from that of the tilting spacer and, if appropriate, the fixing segment. The head of the wiping lip is at least partly made of the same elastomer as the tilting spacer and, if appropriate, the fixing segment and, where appropriate, is made at least partly in the same elastomer as the tip of the wiper. the wiping lip.
    According to a variant of this embodiment, the elastomer of the wiper lip, in particular the tip of the wiping lip, is optimized from the point of view of damping and noise reduction, whereas the elastomer of the wiper lip the tilting spacer and, where appropriate, the fixing segment and, where appropriate, the wiper lip head, are optimized to have other properties, for example cold flexibility and / or heat resistance. . The elastomer of the lip, in particular of the tip of the lip, may be an EP (D) M elastomer and containing plasticizing oil. The elastomer of the tilting spacer and, if appropriate, of the fixing segment and, where appropriate, the head of the wiping lip is made of an elastomer different from that of the lip, for example an elastomer without plasticizer and / or non-mixed elastomer, for example based on polymers which are pure or not mixed with other polymers such as ethylene-propylene-diene rubber and / or ethylene-propylene rubber (EP (D) M), in particular an elastomer without ethylene-propylene-diene rubber and / or without ethylene-propylene rubber and / or a mixture of different polymers for example (EP (D) M-EVM / NOR / TOR / PIB / CR / IIR / CIIR / BIIR). The use of an elastomer containing EP (D) M and a plasticizing oil in the wiper lip, in particular in the tip of the wiping lip, advantageously provides damping and reduction of the corresponding operating noise of the lip of the wiper lip. wiping including the tip of the wiping lip.
    As the tilting spacer and if necessary the fixing segment and, if appropriate, the wiping lip head are made of a different polymer, this improves the cold flexibility and / or the resistance to heat.
    According to another inverted variant of this development, the elastomer of the tilting spacer and / or the fixing segment and / or the head of the wiping lip is optimized for damping and reduction. consecutive noise and if necessary an optimization of the cold flexibility and / or resistance to heat, while the elastomer of the wiping lip including the tip of the wiping lip is optimized for another property for example friction.
    Thus, the elastomer of the tilting spacer and, if appropriate, the securing segment and, where appropriate, the head of the wiping lip comprise an elastomer containing an EP (D) M rubber and / or a plasticizing oil. The elastomer of the wiping lip, in particular the tip of the wiping lip, may be of a different polymer from the elastomer of the wiping lip.
    Thanks to the use of an elastomer containing an EP (D) M rubber and a plasticizing oil for the tilting spacer and if necessary for the fixing segment and, if necessary, for the wiping lip head the damping and consequently the reduction of the noise is advantageously achieved by means of the tilting spacer and, if appropriate, the fixing segment and also the wiping lip head. The elastomer of the wiper lip, in particular the tip of the wiping lip, can thus be made of another polymer.
    From the point of view of technical characteristics and other advantages of the wiper blade according to the invention, it is explicitly referred to the descriptions in connection with the elastomer according to the invention and the windscreen wiper blade according to the invention. invention and the figures and their description.
    Another subject of the invention is an elastomer for a wiping blade, in particular for a windscreen wiper blade, for example that of a motor vehicle comprising at least one ethylene-propylene rubber (EPDM) and / or at least one an ethylene-propylene rubber and in particular at least one plasticizing oil having a pour point in the range of -25 ° C to <+ 25 ° C. In particular, the elastomer contains a plasticizing oil having a pour point> -15 ° C or> -10 ° C or> -5 ° C or> 0 ° C to <+ 25 ° C or <+ 20 ° C or <+ 15 ° C or <+ 10 ° C or <+ 5 ° C. The elastomer is obtained by mixing the components or by a corresponding manufacturing process. The elastomer may contain, for example, 100 parts by weight of polymer, at least one plasticizing oil having a weight content of> 5 parts by weight up to <80 parts by weight for example> 5 parts by weight up to <50 parts by weight for example> 10 parts by weight weight up to <45 parts by weight;
    In addition, the elastomer may contain carbon black. For example, the elastomer comprises, for 100 weight parts of polymer, a content of carbon black in parts by weight of> 30 parts by weight or> 35 parts by weight up to <90 parts by weight or <85 parts by weight or <90 parts by weight or <75 parts by weight. The weight ratio of carbon black to plasticizing oil is, for example, in a range of 90:10 to 50:50. The elastomer may also contain a lubricating agent, a crosslinking agent, a crosslinking accelerator, sulfur and / or a sulfur donor and / or peroxide, a crosslinking co-agent and other plasticizers, white fillers, pigments, coloring agents, anti-degradants, activators such as, for example, zinc oxide, magnesium oxide and / or stearic acid, process aids and / or moisture absorbers such as, for example, calcium oxide.
    For other advantageous features of the invention for the elastomer, it is explicitly referred to the descriptions in connection with the wiper blade according to the invention and the wiper blade according to the invention as well as figures and their description. The invention also relates to a wiper blade comprising a wiper blade according to the invention as defined above and / or an elastomer according to the invention.
    For other technical characteristics and advantages of the windscreen wiper blade according to the invention, reference is made explicitly to the descriptions in connection with the wiping blade according to the invention and to the elastomer according to the invention as well as to the figures and their description.
    drawings
    The present invention will be described in more detail below with the aid of embodiment examples shown diagrammatically in the accompanying drawings in which: FIG. 1 is a schematic section of a first embodiment of a blade of FIG. 2 is a schematic section of a second embodiment of a wiper blade according to the invention, FIG. 3 is a schematic section of a third embodiment of FIG. FIG. 4 is a schematic section of a fourth embodiment of a wiper blade according to the invention, FIG. 5 is a schematic section of a fifth embodiment. embodiment of a wiper blade according to the invention.
    Description of embodiments the invention
    Figures 1 to 5 show different embodiments of a wiper blade 10 having a wiping lip 11, a tipping rib 12 and a securing segment 13. The wiping lip connects a lip head 11a and a lip tip 11b. The lip tip 11b has two wiping edges 11 ', 11 "which, during the scanning movement, pass over the window 20 to be wiped off and discharge the water from the window 20. The tip 11b of the wiping lip is connected at the head 1a of the wiping lip; this head is itself connected by the tilting toggle 12 to the attachment segment 13 so that the entire wiper lip 11 can tilt around the tilting spacer 12 during the wiping movement.
    In the embodiments of Figures 1 to 3, the assembly of the wiper blade 10 is made with same elastomer A comprising at least one ethylene-propylene-diene rubber and / or ethylene-propylene rubber and at least one plasticizing oil having a pour point in the range of -25 ° C to <+ 25 ° C.
    The embodiment of FIG. 2 differs essentially from the embodiment of FIG. 1 in that the head of the wiping lip 11a is narrowed more sharply towards the tip 11b of the wiping lip than in the embodiment of Figure 1.
    The embodiment of FIG. 3 essentially differs from the embodiment of FIG. 2 in that the head 11a of the wiping lip is narrower and the wiping lip 11 is generally shorter (less high) than in the embodiment of Figure 2.
    In the embodiments of Figures 4 and 5, the wiper blade 10 is made of two different elastomers A, B.
    In the embodiment of FIG. 4, the tip 11b of the wiper lip is made of an elastomer A and the head 11 links the wiping lip, the tilting spacer 12 and the fixing segment 13 are made in one piece. other elastomer B.
    According to FIG. 5, conversely to the preceding embodiment, the head 1, the wiping lip, the tilting spacer 12 and the fixing segment 13 are made of elastomer A and the tip 1b of the lip of FIG. wiping is in another elastomer B different from the previous one. The dashed lines indicate the connection zone between the elastomer A and the elastomer B and these connection zones may be closer to either the tip 11b of the wiper lip or of the tilting spacer 12. According to this development only a portion of the tip 1b of the wiping lip is made of an elastomer A, B and the other part of the tip 1b of the wiping lip with the head 1a of the wiping lip, the tilting spacer 12 and the fixing segment 13 are made of a different elastomer B, A, or the tip 1b of the wiping lip and only a portion of the head 1a of the wiping lip are in position. an elastomer A, B and the other part of the head 11a of the wiping lip with the tilting spacer 12 and the fixing segment 13 are in another elastomer, different B, A.
    FIGS. 4 and 5 show an embodiment according to which the elastomer A, just like the elastomer A of the embodiments of FIGS. 1-3, is an elastomer comprising an elastomer with at least one ethylene-propylene-rubber diene and or ethylene-propylene rubber and at least one plasticizing oil having a pour point in the range of -25 ° C to <+ 25 ° C. The other elastomer component B is, for example, an ethylene-propylene-diene-rubber EPDM or an ethylene-propylene rubber / ethylene-vinyl acetate copolymer (EP (D) M-EVM) or EP (D) M-NOR / TOR / GDP / CR / IIR / CIIR / BIIR.
    Examples
    55 weight parts of ethylene-propylene-diene-rubber EPDM were mixed with 45 weight parts of ethylene-vinyl acetate copolymer (EP (D) M-EVM) having a vinyl acetate content of 60% by weight relative to the total weight of the ethylene-vinyl acetate copolymer to form a polymer blend. Then, to 100 parts by weight of the polymer mixture, 60 parts by weight of carbon black, 30 parts by weight of a plasticizing mineral oil according to European Directive 2005/69 / EC with a pour point of -6 ° were added. vs. From the obtained elastomer a wiping blade was manufactured whose operating noise, operating properties and abrasion resistance were tested by tests.
    The wiper blade generated less operating noise or no operating noise and had good operating characteristics as well as good abrasion resistance.
    NOMEN C LATU RE 10 Wiper blade 11 Wiping lip lia Wiper lip head 11b Wiper lip tip 12 Rib / tilting spacer 13 A-B elastomer fixing segment
    权利要求:
    Claims (13)
    [1]
    1) Wiper blade including wiper blade comprising an elastomer with at least one ethylene-propylene-diene rubber and / or ethylene-propylene rubber and at least one plasticizing oil having a pour point defined by the DIN 51597 standard in a range> -25 ° C to <+ 25 ° C, the elastomer being a polymer mixture comprising at least one ethylene-propylene-diene cabutyl and / or ethylene-propylene rubber and at least one a polymer selected from the group consisting of the following polymers: ethylene-vinyl acetate copolymer, polynorbene, trans-polyoctenamer, polyisobutylene, chloroprene rubber, butyl rubber, chlorobutyl rubber, bromobutyl rubber and mixtures thereof.
    [2]
    2) Wiper blade (10) according to claim 1, characterized in that the elastomer contains per 100 parts by weight of polymer> 5 parts by weight up to <80 parts by weight of at least one plasticizing oil with point d flow in a range> -25 ° C to <+ 25 ° C.
    [3]
    3) A wiper blade (10) according to claim 1 or 2, characterized in that the elastomer contains carbon black.
    [4]
    4) A wiper blade (10) according to claim 3, characterized in that the elastomer contains per 100 parts by weight of polymer> 30 parts by weight up to <90 parts by weight of carbon black.
    [5]
    5) A wiper blade (10) according to claim 4, characterized in that the weight ratio between the carbon black and a plasticizing oil with a pour point in a range> -25 ° C to <+ 25 ° C is in the range of 90:10 to 50:50.
    [6]
    6) A wiper blade (10) according to claim 1, characterized in that the elastomer is composed of a polymer mixture containing at least one ethylene-propylene-diene rubber and / or at least one ethylene propylene rubber and at least one at least one ethylene-vinyl acetate copolymer and in particular the polymer mixture contains at least one ethylene-vinyl acetate copolymer having a vinyl acetate content in a range> 45% by weight to <85% by weight relative to the total weight of the ethylene vinyl acetate copolymer .
    [7]
    7 °) wiper blade (10) according to claim 1, characterized in that the elastomer is a polymer mixture containing at least one ethylene-propylene-diene rubber and / or at least one ethylene-propylene rubber and minus another polymer chosen from the group formed by the following polymers: polynorbomene trans-polyoctenamer, po-lyisobutylene, chloroprene rubber, butyl rubber, chlorobutyl rubber, bromobutyl rubber and mixtures thereof, especially in the polymer mixture the weight ratio between the ethylene-propylene-rubber diene and / or ethylene-propylene rubber and the other polymer ranges from 40:60 to 95: 5.
    [8]
    8 °) wiper blade (10) according to claim 7, characterized in that the polyisobutylene has a molecular weight> 100,000 g / mol.
    [9]
    9 °) wiper blade (10) according to one of claims 7 and 8, characterized in that the other polymer is selected from the group consisting of polynorbomene, trans-polyoctenamer, polyisobutylene and mixtures thereof.
    [10]
    10 °) wiper blade (10) according to claim 1, characterized in that it comprises a wiping lip (11), a tilting spacer (12) and a fixing segment (13), - the lip wiper (11) being connected to the tilting spacer (12) and the latter is connected to the fixing segment (13), the wiper lip (11) being at least partly elastomeric, and or - the tilting spacer (12) and / or the fixing segment (13) are made of elastomer.
    [11]
    11 °) wiper blade (10) according to claim 1, characterized in that it comprises at least one other elastomer (B) which contains in particular at least one ethylene-propylene-rubber diene and / or at least one ethylene- propylene rubber and / or a polymer mixture of at least one ethylene-propylene-rubber diene and / or at least one ethylene-propylene rubber and at least one other polymer selected from the group consisting of the following polymers: vinyl-vinyl acetate, polynorbene, trans-polyoctenamer, polyisobutylene, chloroprene rubber, butyl rubber, chlorobutyl rubber, bromobutyl rubber, and mixtures thereof.
    [12]
    12 °) Elastomer for a wiping blade, in particular a wiper comprising at least one ethylene-propylene-rubber diene and / or at least one ethylene-propylene rubber and at least one plasticizing oil having a pour point defined by the DIN 51597 in a range> -25 ° C to <+ 25 ° C, and in particular the elastomer contains per 100 parts by weight of polymer> 5 parts by weight up to <80 parts by weight of the plasticizing oil having a pour point in a range> -25 ° C to <+ 25 ° C and in particular the elastomer contains per 100 parts by weight of polymer> 30 parts by weight up to <90 parts by weight of carbon black and the ratio weight ratio between carbon black and plasticizing oil having a pour point in the range of -25 ° C to <+ 25 ° C is in the range of 90:10 to 50:50, The elastomer being a polymer mixture comprising the ego an ethylene-propylene-diene rubber and / or ethylene-propylene rubber and at least one polymer selected from the group consisting of the following polymers: ethylene-vinyl acetate copolymer, polynorbornene, trans-polyoctenamer, polyisobutylene, chloroprene rubber, butyl rubber chlorobutyl rubber, bromobutyl rubber and mixtures thereof.
    [13]
    13 °) Wiper comprising a wiper blade (10) according to any one of claims 1 to 11 and / or an elastomer according to claim 12.
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    同族专利:
    公开号 | 公开日
    FR3001972A1|2014-08-15|
    MX2014001548A|2014-09-02|
    DE102013202109A1|2014-08-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0327755A2|1987-11-02|1989-08-16|Ford Motor Company Limited|Improved wiper blade compositions|
    US4853428A|1987-11-02|1989-08-01|Ford Motor Company|Elastomer compositions with superior low temperature flexibility|
    JP3476676B2|1998-05-22|2003-12-10|横浜ゴム株式会社|Wiper blade|
    US7615589B2|2007-02-02|2009-11-10|Exxonmobil Chemical Patents Inc.|Properties of peroxide-cured elastomer compositions|
    DE102008001347A1|2008-04-23|2009-10-29|Robert Bosch Gmbh|Process for the production of extruded extrudates|
    US8679638B2|2008-07-22|2014-03-25|Mitsuba Corporation|Method of manufacturing blade rubber and wiper blade|
    DE102009001043A1|2009-02-20|2010-08-26|Robert Bosch Gmbh|Wiper blade for a windscreen wiper and method for its production|
    法律状态:
    2018-11-29| FG| Patent granted|Effective date: 20160406 |
    2018-11-29| MM| Lapsed because of non-payment of the annual fee|Effective date: 20180228 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE201310202109|DE102013202109A1|2013-02-08|2013-02-08|Rubber, useful for windshield wipers that are useful in motor vehicle, includes an elastomer material comprising ethylene-propylene-diene rubber and/or ethylene-propylene rubber and extender oil having a specified pour point|
    DE132021097|2013-02-08|
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