Aqueous contact adhesive dispersions, process for their...

C - Chemistry – Metallurgy – 09 – J

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C09J 131/02 (2006.01) C08F 218/10 (2006.01) C09J 133/08 (2006.01)

Patent

CA 2085206

The invention relates to aqueous contact adhesive dispersions containing, based on the total weight of the dispersion, from 40 to 70% by weight of a copolymer prepared by emulsion polymerization, where the copolymer contains a) from 40 to 70% by weight of vinyl esters of aliphatic carboxylic acids having 2 to 12 carbon atoms, b) from 10 to 40% by weight of acrylic acid esters of aliphatic alcohols having 4 to 12 carbon atoms, c) from 8 to 15% by weight of methacrylic acid esters of aliphatic alcohols having 4 to 12 carbon atoms, d) from 0.1 to 3% by weight of ethylenically unsaturated compounds which cause cross-linking, e) from 0.1 to 5% by weight of ethylenically unsaturated carboxylic acids, f) from 0.1 to 2% by weight of substituted and unsubstituted (meth)acrylamides, g) from 0.5 to 3% by weight of ethylenically unsaturated hydroxyalkyl-functional compounds, and h) from 0.5 to 3% by weight of ethylenically unsaturated sulfates and/or sulfonates. The invention furthermore relates to a process for the preparation of the contact adhesive dispersions and to their use.

L'invention concerne des dispersions aqueuses d'adhésifs de contact contenant, par rapport au poids total de la dispersion, de 40 à 70 % en poids d'un copolymère préparé par polymérisation en émulsion; le copolymère contient a) de 40 à 70 % en poids d'esters vinyliques d'acides carboxyliques aliphatiques comptant de 2 à 12 atomes de carbone, b) de 10 à 40 % en poids d'esters acryliques d'alcools aliphatiques ayant de 4 à 12 atomes de carbone, c) de 8 à 15 % en poids d'esters méthacryliques d'alcools aliphatiques ayant de 4 à 12 atomes de carbone, d) de 0,1 à 3 % en poids de composés éthyléniquement insaturés qui provoquent une réticulation, e) de 0,1 à 5 % en poids d'acides carboxyliques éthyléniquement insaturés, f) de 0,1 à 2 % en poids de (méth)acrylamides substitués et non, g) de 0,5 à 3 % en poids des composés à fonctionnalité hydroxyalkyle éthyléniquement insaturés, et h) de 0,5 à 3 % en poids de sulfates et/ou de sulfonates éthyléniquement insaturés. De plus, l'invention concerne un procédé de préparation de dispersions d'adhésifs de contact et leur utilisation.

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