BITUM GLUE.

专利摘要:
A bitumen glue for cold gluing structural material and containing an amount of non-polymerized oil, said glue contains at least 35% by weight of bitumen, said glue further contains clay and a dispersant, said amount of non-polymerized oil forms between 5 and 30% by weight of said glue and is not mixed with polymerized oil.
公开号:BE1019599A3
申请号:E2008/0086
申请日:2008-02-14
公开日:2012-09-04
发明作者:Hans Aerts；Eric Bertrand；Michel Getlichermann
申请人:Imperbel N V Sa；
IPC主号:

专利说明:

Bitumenliim.
The invention relates to a bitumen glue for cold gluing structural material and containing an amount of non-polymerized oil.
Such a glue is known from European patent application 1674547. The known glue contains a combination of non-polymerized oil which forms between 1 and 60% of the glue and a polymerized oil with ethyl vinyl acetate copolymer resin (EVA) which is between forms the 1 and 60% of the glue. The known glue further comprises a limited amount of bitumen which forms an additional adhesive. Bitumen glue is used in cold bonding of construction material, in particular for its watertight properties. The known glue is thixotropic, which means that it becomes liquid upon shaking, stirring or other movements and becomes gel when it comes to a stop afterwards. The thixotropic properties of the known glue are obtained by the presence of both the polymerized oil in combination with the ethyl vinyl acetate copolymer resin (EVA) and the non-polymerized oil in combination with the oil-absorbing filler. The use of the combination of these components has the advantage that it provides the thixotropic properties without having to use organic solvents.
A drawback of the known bitumen glue is that the amount of bitumen is limited to 29% by weight because more bitumen would increase the viscosity, making the use of cold glue more difficult. The low amount of bitumen considerably limits the waterproof properties of the glue.
The invention has for its object to realize a bitumen glue which contains improved watertight properties without affecting its thixotropic properties and without considerably increasing the viscosity.
To this end, a bitumen glue according to the invention is characterized in that said glue contains at least 35% by weight of bitumen, said glue furthermore contains clay and a dispersant, said amount of non-polymerized oil constitutes between 5 and 30% by weight of said glue and is not mixed with polymerized oil.
The amount of at least 35% by weight of bitumen ensures that the glue has good waterproof properties. Although there is a maximum of 30% by weight of non-polymerized oil, the presence of the clay and the dispersant in combination with the non-polymerized oil provides sufficient thixotropic properties and a suitable viscosity for the bitumen glue.
A first preferred embodiment of the bitumen glue according to the invention is characterized in that said glue furthermore contains a maximum of 10% by weight of a volatile organic component solvent (VOC). The presence of such a VOC solvent improves both the thixotropic properties and the viscosity of the glue. Because a maximum of 10% by weight of VOC solvent is present, the amount of VOC solvent remains low, so that an environmentally friendly adhesive is still obtained.
A second preferred embodiment of the bitumen glue according to the invention is characterized in that said glue furthermore contains a maximum of 10% by weight of a non-volatile organic component solvent. The presence of such a non-VOC solvent improves both the thixotropic properties and the viscosity of the glue. Because it is a non-VOC solvent, it will not harm the environment.
A third preferred embodiment of the bitumen glue according to the invention is characterized in that said glue further comprises fibers which form between 1 and 3% by weight of the glue. The presence of fibers improves the cohesion character of the glue.
A fourth preferred embodiment of the bitumen glue according to the invention is characterized in that said glue further comprises between 0.1 and 0.4% by weight of clay. The clay improves the thixotropic properties of the glue.
A fifth preferred embodiment of the bitumen glue according to the invention is characterized in that said glue contains a dispersing substance which is formed by a surface tension reducing substance, which activates the clay. The presence of a surface tension reducing substance improves the thixotropic properties.
A sixth preferred embodiment of the bitumen glue according to the invention is characterized in that said oil is formed by an unsaturated vegetable oil, in particular an ester of an unsaturated vegetable oil. The use of such a natural product has the advantage that it is environmentally friendly.
The bitumen preferably has a penetration between 20 and 500 dmm (1/10 mm).
The invention also relates to the use of a solvent-type vegetable oil, and / or an unsaturated vegetable oil and / or conjugated and / or chemically modified vegetable oil and / or naturally functionalized vegetable oil, in such a bitumen glue.
The invention will be described in more detail in the description that follows below.
The bitumen glue according to the invention is provided for cold bonding of construction material such as bitumen membranes, metal roofing plates, insulation plates, etc. The bitumen glue may contain a non-volatile organic component solvent (VOC) and / or a volatile organic component solvent. An adhesive is considered a non-VOC adhesive if the adhesive consists of less than 3% by weight of volatile organic components, which is more environmentally friendly than VOC adhesives. A glue is considered a layer of VOC glue if the glue contains at most 10% by weight of volatile organic components. Indeed, the volatile components of VOC adhesives end up in the air when the glue is applied, causing air pollution. By limiting the amount of solvent to a maximum of 10% by weight of the glue, the contamination remains very low. The presence of VOC and non-VOC solvents helps to control the viscosity of the glue.
The bitumen glue according to the present invention contains between 5 and 30% by weight of non-polymerized oil and this oil is not mixed with polymerized oil. In this way the glue according to the invention is distinguished from the glue which is known from EP 1 674 547. In the latter document it is learned that, in order to provide the glue with thixotropic properties, the oil preferably consists of: (1) between 1 and 60%, of the total composition of the glue, polymerized oil with ethyl vinyl acetate copolymer resin (EVA) and (2) Between 1 and 60%, of the total composition of the glue, non-polymerized oil with oil absorbent filler. This document gives no hint to obtain the thixotropic properties in a different way than with a combination of a polymerized oil with ethyl vinyl acetate copolymer resin (EVA) and a non-polymerized oil with oil-absorbing filler.
In addition, document EP 1 674 547 teaches that the amount of bitumen to get an additional tack may not be more than 29% by weight. According to the present invention, the glue contains at least 35% by weight of bitumen and preferably between 40 and 60% by weight of bitumen. The teachings from EP 1 674 547 lead the skilled person away from the use of more than 29% by weight of bitumen and from the use of only non-polymerized oil.
The use of at least 35% of bitumen, and preferably between 40 and 60% by weight of bitumen, has the advantage that it provides the glue with good waterproof properties. In addition, because bitumen has its own adhesive properties, the presence of the bitumen contributes to the adhesive properties of the glue. The bitumens used preferably have the property of a penetration of 20 to 500 dmm (1/10 mm) when measured by a needle penetration method.
To provide the glue with thixotropic properties, while maintaining a layer or non-VOC glue, clay and a dispersant are added to the bitumen and the oil. The dispersant is preferably formed by a surface tension reducing component which forms 0.1 to 1% by weight of the glue. The clay forms between 0.1% and 0.4% by weight of the glue, preferably 0.34% by weight of the glue.
The clay is activated by the surface tension reducing substance. More specifically, the clay is dispersed by the surface tension reducing substance. The combination of the oil, and if present the VOC solvent and / or non-VOC solvent, with the dispersant and the clay provide the glue for thixotropic properties. The solvents, if present, cause the clay to swell and therefore provide a gel with good thixotropic properties. A composition containing such a gel has relatively good dispersion stability without sedimentation or long-term separation. In addition, such a composition does not require vigorous shaking to achieve a fluidity of the glue.
The dispersant has the physical property that the molecule is charged on one side and is non-polar on the other. When dispersing the clay, the clay particles orient themselves in the same direction as a result of a shaking or stirring force and as a result they contribute to the thixotropic properties. When the force is no longer applied, the clay particles will orientate randomly and glue returns to the rest position.
The oil used is preferably formed by a solvent-type vegetable oil and / or unsaturated vegetable oil and / or a mixture of chemically modified vegetable oil and / or a mixture of naturally functionalized vegetable oil and / or conjugated vegetable oil which have specific characteristics adds to the bitumen glue.
In a bitumen glue, according to the invention, the oil imparts good viscosity properties to the bitumen glue at the time of use. The viscosity of the bitumen glue is between 10 and 20 Pa.s at 20 ° C and a shear of 5 seconds.
Preferably, an oil of the solvent type is used, such as, for example, short-chain vegetable oil, which remains chemically inert when applying the glue. This oil does not react chemically in the glue, but is introduced into the matrix structure of the glue without chemical bonding with other molecules. For such solvent type oil, more specifically, short chain vegetable oil esters, more specifically methyl esters can be used. Among the vegetable oils, methyl cocoate and methyl laurate are a suitable choice. The latter oils contain C8-C12 chains which are chemically inert and provide the glue with a low viscosity.
In another preferred embodiment of a bitumen adhesive according to the invention, the used oil polymerizes by reaction between unsaturated or conjugated vegetable oils, and / or between different unsaturated vegetable oils, and / or between differently conjugated vegetable oils and between unsaturated and conjugated vegetable oils in the presence of oxygen. This also includes chemically modified vegetable oils through oxidation, dimerization and trimerization and naturally functionalized vegetable oils. More specifically, vegetable oil esters can be used and more specifically, vegetable oil methyl esters. Drying accelerators and anti-pollutants are added if necessary to facilitate the polymerization reaction or to improve the performance of the bitumen glue. Among the vegetable oils, a mixture of linseed methyl ester and tung oil methyl ester is a suitable choice.
Preferably the oil contains a maximum of 99% by weight of solvent-type oil, and / or 50 to 99% by weight of unsaturated vegetable components, and / or a maximum of 50% by weight of conjugated or chemically modified or naturally functionalized vegetable components. The dry accelerators form a maximum of 2% by weight of the glue and the anti-pollution parts form a maximum of 2% by weight of the glue.
It is advantageous if the glue according to the invention also contains fibers, more specifically cellulose fibers, which constitute between 1 and 3% by weight of the glue. The fibers contribute to the cohesion of the glue and provide the glue with a more coherent and solid character.
Although the fibers contribute to the thixotropic properties of the glue, their contribution is less than that of the clay and the dispersant.
In the table below an example is given of the ingredients of an adhesive according to the invention. The indicated amounts are given in relation to the total composition of the glue.
To test the effect of the glue, a flake test was done with a bitumen membrane of 5 x 30 cm on a concrete support. The flake test was carried out at a speed of 100 mm / min. The results are shown in the table below and are represented as N / 5 cm (Newton / 5 cm). The surface of the concrete support was first treated with a bitumen substrate and dried for a minimum of 12 hours. The results are obtained after 28 days at room temperature and after 28 days at 70 ° C. The first column shows the individual values while the second column shows the averages.
After artificial aging (28 days at 70 ° C), the effect of the glue has increased dramatically and a high-performance glue has been obtained.

权利要求:
Claims (19)
[1]
Bitumen glue for cold gluing structural material and containing an amount of non-polymerized oil, characterized in that said glue contains at least 35% by weight of bitumen, said glue further contains clay and a dispersant, said amount of non-polymerized oil forms between 5 and 30% by weight of said glue and is not mixed with polymerized oil.
[2]
Bitumen glue according to claim 1, characterized in that said glue further contains a maximum of 10% by weight of volatile organic component solvent (VOC).
[3]
Bitumen glue according to claim 1 or 2, characterized in that said glue further contains a maximum of 10% by weight of a non-volatile organic component solvent.
[4]
Bitumen glue according to any of claims 1 to 3, characterized in that said glue further comprises fibers which form between 1 and 3% by weight of the glue.
[5]
Bitumen glue according to claim 4, characterized in that said fibers are cellulose fibers.
[6]
Bitumen glue according to one of claims 1 to 5, characterized in that said dispersing substance is formed by a surface tension reducing substance.
[7]
Bitumen glue according to claim 6, characterized in that said surface tension reducing substance constitutes 0.1 to 1% by weight of said glue.
[8]
Bitumen glue according to one of claims 1 to 7, characterized in that said oil is formed by vegetable oil.
[9]
Bitumen glue according to claim 8, characterized in that said vegetable oil contains a maximum of 99% by weight of vegetable type of the solvent type, which remains chemically inert during the application of the glue, and / or between 50 and 100% by weight of unsaturated vegetable oil and / or a maximum of 50% by weight of conjugated or chemically modified or naturally functionalized vegetable oils.
[10]
Bitumen glue according to one of claims 1 to 9, characterized in that it further comprises a maximum of 2% by weight of dry accelerators, and / or a maximum of 2% by weight of anti-fouling parts.
[11]
Use of a solvent-type vegetable oil in a bitumen glue according to claim 9, characterized in that said oil is formed by short-chain vegetable oil esters, in particular by short-chain vegetable oil methyl esters (C8-C10) ).
[12]
Use of a solvent-type vegetable oil in a bitumen glue according to claim 9, characterized in that said oil is formed by methyl cocoate and / or methyl laurate.
[13]
Use of a solvent-type vegetable oil in a bitumen glue according to claim 9, characterized in that said oil is formed by esters of an unsaturated vegetable oil.
[14]
Use of a solvent-type vegetable oil in a bitumen glue according to claim 9, characterized in that said oil is formed by a linseed methyl ester.
[15]
Use of a conjugated or chemically modified vegetable oil in a bitumen glue according to claim 9, characterized in that said oil is formed by esters of conjugated or chemically modified or naturally functionalized vegetable oils.
[16]
Use of a conjugated or chemically modified vegetable oil in a bitumen glue according to claim 9, characterized in that said oil is formed by a tung oil methyl ester or an oxidized methyl ester.
[17]
Bitumen glue according to one of claims 1 to 10, characterized in that said clay is activated by a surface tension-reducing substance which forms between 0.1 and 0.4% by weight of said glue.
[18]
Bitumen glue according to any of claims 1 to 10, characterized in that said clay is activated by a surface tension reducing substance which constitutes 0.34% by weight of said glue.
[19]
Bitumen glue according to any of claims 1 to 10, characterized in that said bitumen has a penetration between 20 and 500 dmm (1/10 mm).

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法律状态:
2021-10-27| MM| Lapsed because of non-payment of the annual fee|Effective date: 20210228 |

优先权:

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申请号 | 申请日 | 专利标题

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EP07119808A|EP2055758A1|2007-10-31|2007-10-31|A bituminous glue.|

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EP07119808|2007-10-31|

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