• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A process for producing a soft polyurethane foam is described, wherein the optionally added with additives and a silicone foam stabilizer containing reaction components are foamed with water as a blowing agent. In order to achieve a high air permeability, it is proposed that a silicone defoamer in a weight ratio of 100: 0.5 to 100: 1.5 is added to the reaction components in addition to the silicone foam stabilizer.
    公开号:CH709961A2
    申请号:CH01186/14
    申请日:2014-08-05
    公开日:2016-02-15
    发明作者:Gerd Breckle
    申请人:Breckle Chemicals & Technics Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a process for producing a soft polyurethane foam, wherein the optionally added with additives and a silicone foam stabilizer containing reaction components are foamed with water as a blowing agent.
    Mattresses made of a soft polyurethane foam are characterized by good properties in terms of elasticity, a physiologically pleasant restoring elasticity, an adjustable strength and thermal insulation. However, the air and vapor permeability is in need of improvement, because it can come in a relevant temperature range up to 40 ° C due to perspiration of the body during the sleep phase to a moisture accumulation, due to insufficient ventilation through the mattress, as a measure of the air permeability of Mattresses can be given the pressure required to continuously pass air through a 10 cm thick mattress. In conventional polyurethane foams having a density of from 35 to 40 kg / m 3, this pressure can be given as 12 to 18 mmWS, which increases considerably with increasing density depending on the respective type of polyurethane foam and, for example, for viscoelastic polyurethane foams having a density between 50 and 65 kg / m <3> <> 450 to 500 mmWS. Since mattresses having viscoelastic properties are being developed for reasons of increased lying comfort, a reduction of the weight in order to improve the air permeability is scarcely possible.
    The invention is therefore an object of the invention to provide a method for producing softer, in particular for mattresses suitable polyurethane foams, with the help of a comparatively high air permeability at densities over 40 kg / m <3> can be ensured.
    Starting from a method of the type described above, the invention solves the stated object in that the reaction components in addition to the silicone foam stabilizer, a silicone defoamer in a weight ratio of 100: 0.5 to 100: 1.5 is added.
    By the combination of silicone foam stabilizers, as they are used by default in products made of a soft polyurethane foam, and a balanced amount of silicone defoamers, such as those used in the defoaming of wetting solutions and dispersions, it is possible in a surprising manner, on the one hand the proportion of To reduce decisively closed pores and on the other hand to enlarge the pores, so that the flow resistance can be significantly reduced by such polyurethane foams.
    As foam stabilizers siloxane-polyolefin oxide copolymers can be used in a relative to the reaction components of the polyurethane foam amount of 0.8 to 2.0 wt.%, Which in the sense of increasing the porosity of the polyurethane foam well with oils on the basis of dimethylpolysiloxanes act as Siliokonentschäumer.
    The inventive effect is illustrated by the following examples, in which a polyurethane foam according to the invention is compared with a comparative foam having the same composition but without Silikonentschäumer.
    Comparative Example 1
    87 parts by weight of a polyol (triol based on trimethyolpropane and propylene oxide having an OH number of 50 (+/- 2) mg KOH / g, 13 parts by weight of calcium carbonate (4-5 mm grain size) as a filler, 0.9 parts by weight of a siloxane-polyolefin oxide copolymer (NIAX L 620 from Momentiv, USA) as a silicone foam stabilizer, 0.1 part by weight of 1,4-diazabicyclo [2.2.2] octane as a 33% strength by weight dispersion in dipropylene glycol (DABCO 33%) as a foaming catalyst, , 3 parts by weight of dymethylcyclohexylamine as foaming catalyst, 0.17 parts by weight of stannous octoate as a further foaming catalyst, 2.4 parts by weight of water as blowing agent and 33.4 parts by weight of toluene diisocyanate are homogeneously mixed within 5 s and allowed to foam freely.
    There is obtained a soft polyurethane foam of known type.
    Example 2
    It is prepared a polyurethane foam according to Comparative Example 1, but with the addition of 0.5 parts by weight of a silicone defoamer (NIAX SC 200 in a 2% solution in polyol Momentiv, USA). The weight ratio between the silicone foam stabilizer and the additional silicone defoamer was 100: 1.1.
    From the table below, the different properties of the inventive polyurethane foam according to Example 2 compared to the polyurethane foam according to Comparative Example 1 result.<tb> Bulk density [kg / m <3>] <SEP> 41 <SEP> 42<tb> Compressive Hardness [kPa] <SEP> 4,7 <SEP> 4,4<Tb> Compression set <September> 4.2% <September> 3.6<tb> Air Permeation Resistance [mmWS] <SEP> 72 <SEP> 14<tb> cell size [mm] <SEP> 0.7 <SEP> 0.5 to 4
    Comparative Example 3
    70 parts by weight of polyether polyol having predominantly primary hydroxyl end groups and a proportion of 25% grafted styrene acrylonitrile and an OH number of 26 mg KOH / g, 10 parts by weight of trifunctional polyether polyol having primary hydroxyl end groups and an OH number of 28 mg KOH / g, 10 Parts by weight of calcium carbonate (particle size 5-15 mm), 2 parts by weight of silicone foam stabilizer (NIAX L 620), 0.9 part by weight of diethanolamine as amine crosslinker, 0.66 part by weight of sorbitol in a 33% strength aqueous solution as hydroxyl crosslinker, 0.4 part by weight of DABCO 33% , 0.06 parts by weight of tertiary amine (NN-tetra-methylhexamethylenediamine) as a foaming catalyst, 0.13 parts by weight of tin octoate as a foaming catalyst, 2.0 parts by weight of water as a blowing agent and 30.0 parts by weight of toluene diisocyanate (NCO Index 105) within 5 s homogeneously mixed and allowed to foam freely.
    Example 4
    It is prepared a polyurethane foam according to Comparative Example 3, but with an addition of 0.1 parts by weight of a silicone defoamer (SILFOAM SE 9 in a 16% dispersion in water from Wacker Chemie AG, DE). The weight ratio between the silicone foam stabilizer and the additional silicone defoamer was 100: 0.8.
    From the table below, the different properties of the inventive polyurethane foam according to Example 4 compared to the polyurethane foam according to Comparative Example 3 result.<tb> Bulk density [kg / m <3>] <SEP> 42 <SEP> 44<tb> Compressive Hardness [kPa] <SEP> 3.8 <SEP> 4.2<Tb> Elongation at break <September> 80% <September> 75%<tb> Tensile strength [kPa] <SEP> 95 <SEP> 92<Tb> rebound <September> 58% <September> 54%<tb> Compression Set <SEP> 5.8% <SEP> 5%<tb> Air Permeation Resistance [mmWS] <SEP> 85 <SEP> 18<tb> cell size <SEP> 0.8 to 1.0 <SEP> 07 to 4.4
    权利要求:
    Claims (3)
    [1]
    1. A process for producing a soft polyurethane foam, wherein the optionally added with additives and a silicone foam stabilizer reaction components are foamed with water as a blowing agent, characterized in that the reaction components in addition to the silicone foam stabilizer, a silicone defoamer in a weight ratio 100: 0.5 to 100: 1 , 5 is added.
    [2]
    2. The method according to claim 1, characterized in that a siloxane-Polyolefinoxidcopolymer is used in a relative to the reaction components of the polyurethane foam amount of 0.8 to 2.0 wt .-% as a foam stabilizer.
    [3]
    3. The method according to claim 1 or 2, characterized in that an oil based on dimethylpolysiloxanes is used as silicone defoamer.
    类似技术:
    公开号 | 公开日 | 专利标题
    DE102011109540A1|2013-02-07|Alkylcarbonate end-capped polyethersilioxanes and process for their preparation
    EP2554574A1|2013-02-06|Polysiloxane polyether copolymers with | remnants containing carbonate groups and use of same as stabilisers for production of polyurethane foams
    DE60215103T2|2007-03-01|Flexible polyurethane foam and process for its preparation
    DE102005050473A1|2007-04-26|Process for the preparation of polyurethane cold foams
    CN104672427B|2018-02-13|Soft bubble of a kind of high hardness polyurethane for automotive upholstery and preparation method thereof
    DE102004051048A1|2006-04-20|Soft elastic foams of low bulk densities and compression hardness
    DE102011004651A1|2012-02-09|Silicone copolymers with pendant via allyl glycidyl ether and related compounds attached alkyl radicals and their use as stabilizers for the production of flexible polyurethane foams
    EP0106101B1|1987-07-15|Process for preparing highly elastic cold curing polyurethane foams
    DE212013000299U1|2016-01-18|Latex Sponge
    WO2007144272A1|2007-12-21|Open-cell viscoelastic flexible polyurethane foams
    DE69723993T2|2004-07-22|USE OF POLYOL MIXTURES IN FOAM PRODUCTION AND METHOD FOR PRODUCING FOAMS USING THIS
    DE2728031A1|1978-03-09|PROCESS FOR MANUFACTURING HIGHLY ELASTIC POLYURETHANE FOAM
    DE102015204525A1|2015-09-24|Flame retardant composition of a polyurethane block foam for flame lamination
    CH709961A2|2016-02-15|A method of producing a soft polyurethane foam.
    WO2016091897A1|2016-06-16|Method for producing viscoelastic polyurethane foams
    EP2260066A1|2010-12-15|Flame-retardant, reduced-weight elastic flexible polyurethane foam
    DE3626297C1|1987-07-09|Process for the production of highly elastic, cold-curing polyurethane foams
    DE3215317C1|1983-06-09|Process for the production of highly elastic cold-curing polyurethane foams
    EP2057233B1|2014-06-11|Novel polyurethanes of high water content, processes for their preparation and use
    EP3177678A1|2017-06-14|Method for producing a soft polyurethane foam
    DE112013002001T5|2015-03-19|Hydrophilic polyurethane foam
    EP3455271B1|2021-02-10|Viscoelastic foams with high density
    EP3177679A1|2017-06-14|Method for producing a soft polyurethane foam
    DE2615804C2|1986-04-24|Method of making urethane foams
    EP1585778B1|2010-09-15|Hydrophobic propellant gas mixtures for producing insulating foams
    同族专利:
    公开号 | 公开日
    CH709961B1|2018-03-15|
    EP2982705A1|2016-02-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    BE584820A|1957-09-25|
    GB2119393B|1982-04-08|1985-12-11|Caligen Foam Ltd|Polyurethane foam|
    法律状态:
    2019-07-15| PFUS| Merger|Owner name: BRECKLE MATRATZENWERK WEIDA GMBH, DE Free format text: FORMER OWNER: BRECKLE CHEMICALS AND TECHNICS GMBH, DE |
    优先权:
    申请号 | 申请日 | 专利标题
    CH01186/14A|CH709961B1|2014-08-05|2014-08-05|Process for producing a soft polyurethane foam.|CH01186/14A| CH709961B1|2014-08-05|2014-08-05|Process for producing a soft polyurethane foam.|
    EP15173124.7A| EP2982705A1|2014-08-05|2015-06-22|Process for making a flexible polyurethane foam|
    [返回顶部]