Pigment pastes, process for producing pigment pastes and the...

C - Chemistry – Metallurgy – 09 – D

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C09D 17/00 (2006.01) C08F 283/02 (2006.01) C09D 151/08 (2006.01)

Patent

CA 2104846

22 Abstract: Pigment pastes are produced by pasting or blending one or several pigments and/or fillers in a paste resin based on a polyester oligomer polyacrylate which is obtainable by radical polymerisation of A) 80 - 50 wt% of a) one or several hydroxyfunctional acrylic acid esters and/or methacrylic acid esters and b) one or several monofunctional ethylenically unsaturated acids, as well as, optionally, c) one of several alpha,beta-ethylenically unsaturated monomers without functional groups in B) 20 - 50 wt% of one or several hydroxyfunctional polyester oligomers with a calculated molecular weight of 200 - 1000, a hydroxy number of 280 - 600 and an acid number of 0 - 1.5, obtainable by polycondensation of one of several diols, polyols and dicarboxylic acids and derivatives thereof, whereby the monomers a), b) and c) are used in such quantities as to ensure that the polyester oligomer polyacrylate obtained has a hydroxyl number of 150 - 390 and an acid number of 16 - 40. The pigment pastes are suitable for the pigmentation of the most diverse coating agents, both water-based and non-aqueous. Also described are the pigment pastes obtained and the use thereof in the production of coating agents and lacquer coatings.

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