C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/3075, 400/90
C09D 133/08 (2006.01) C09D 5/02 (2006.01) C09D 151/00 (2006.01)
Patent
CA 1327861
ABSTRACT Aqueous coating composition having a basis of a dispersion of an addition polymer (acting as binder), particularly as a base coat which is to be covered with a clear coat. To obtain layers having improved mechanical properties use is made of an addition polymer which is obtained in two or more steps by emulsion polymerization. In a first step copolymerization is effected of 60-95 parts b.w., based on 100 parts b.w. of addition polymer, of a monomer mixture comprising (A) 65-100 mole % of a mixture of 60-100 mole % of a (cyclo)alkyl (meth)acrylate, in which the (cyclo)alkyl group contains 4-12 C-atoms, and 0-40 mole % of a di(cyclo)alkyl maleate and/or a di(cyclo)alkyl fumarate, in which the (cyclo)alkyl groups contain 4-12 C- atoms, and 0-35 mole % of another, copolymerizable, monoalkylenically un- saturated monomer, and in a subsequent step of 5-40 parts b.w., based on 100 parts b.w. of addition polymer, of a monomer mixture (B) of 10-60 mole % of (meth)acrylic acid and 40-90 mole % of another copolymerizable, mono- alkylenically unsaturated monomer, the (meth)acrylic acid moieties being at least partially ionized.
563387
Akzo N.v.
Marks & Clerk
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