Dispersion resins containing itaconic acid for improving wet...

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 5/02 (2006.01) C08F 222/02 (2006.01) C09D 7/12 (2006.01) C09D 17/00 (2006.01) C09D 133/06 (2006.01) C09D 151/00 (2006.01)

Patent

CA 2322590

The invention relates to aqueous pigment preparations containing i) at least one copolymer P of ethylenically unsaturated monomers M in the form of an aqueous polymer dispersion which contains between 0.1 and 1.5 weight %, in relation to the total weight of the copolymer P, of polymerised itaconic acid as acid monomer M1, its salts and/or anhydride, where up to 50 weight % of the itaconic acid can be substituted by another monomer having at least one acid group or a neutralised acid group, and whose glass transition temperature TG lies between -10 and +50 ~C; ii) at least one inorganic pigment; iii) possibly inorganic fillers; and iv) standard additives. The invention also relates to the use of the copolymers P containing itaconic acid for improving the wet- abrasion resistance of polymer-bound coatings containing pigments.

L'invention concerne des préparations aqueuses contenant des pigments, qui comprennent i) au moins un copolymère P constitué de monomères M éthyléniquement insaturés, se présentant sous la forme d'une dispersion aqueuse de polymères qui contient 0,1 à 0,5 % en poids, par rapport au poids total du copolymère P, d'acide itaconique polymérisé sous forme de monomère M1 acide, ses sels et/ou son anhydride, 50 % en poids maximum dudit acide itaconique pouvant être substitué par un autre monomère comportant au moins un groupe acide ou un groupe acide neutralisé, et dont la température de transition vitreuse T¿G? est comprise entre -10 et +50 ·C; ii) au moins un pigment inorganique; iii) éventuellement des charges inorganiques; et iv) les adjuvants habituels. L'invention concerne également l'utilisation des copolymères P contenant de l'acide itaconique pour améliorer la résistance à l'abrasion humide de substances de revêtement liées par des polymères et contenant des pigments.

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