HAERTBARES KLEBMITTEL
A thermosetting adhesive containing as the active components (a) a copolymer which is obtained by the polymerization of (a1) 35 to 70 weight percent of one or more alkyl esters of acrylic and/or methacrylic acid, with 1 to 8 carbon atoms in the alkyl radical, (a2) 20 to 45 weight percent of acryloni...
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Zusammenfassung: | A thermosetting adhesive containing as the active components (a) a copolymer which is obtained by the polymerization of (a1) 35 to 70 weight percent of one or more alkyl esters of acrylic and/or methacrylic acid, with 1 to 8 carbon atoms in the alkyl radical, (a2) 20 to 45 weight percent of acrylonitrile and/or methacrylonitrile and/or vinyl acetate, (a3) 10 to 20 weight percent of one or more omega -hydroxyalkyl esters of acrylic and/or methacrylic acid with 1 to 5 carbon atoms in the alkyl radical, (a4) 0 to 15 weight percent of acrylamide and/or methacrylamide, and (a5) 0 to 35 weight percent of acrylic or vinyl monomers, whose composition deviates from that of components (a1) and (a4), wherein the sum of the monomers (a1) to (a5) amounts to 100 weight percent and the copolymer has a limiting viscosity of 0.05 to 0.6 (100 mlxg-1) at 25 DEG C. in methyl acetate, and (b) one or more polyisocyanates and/or their partial reaction products with polyols, the molecule having on the average at least 2 isocyanate groups, components (a) and (b) being present in a ratio such that one hydroxyl group of component (a) corresponds to 1 to 1.5 isocyanate groups of component (b), as well as, if necessary, the usual additives, such as, accelerators, gluing auxiliaries, pigments and fillers. The adhesive can be cured at temperature of 80 DEG C. and less, without decreasing the adhesion. In so doing, the moisture resistance and the resistance towards weathering are maintained. The adhesive is therefore particularly suitable for the manufacture of skis. |
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