C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
117/147, 117/195
C08G 18/08 (2006.01) C08G 18/42 (2006.01) C08G 18/80 (2006.01) C09D 175/00 (2006.01)
Patent
CA 1306322
Abstract of the disclosure: Dispersions of crosslinked polymer micro-particles in aqueous media, a process for the preparation of these dispersions, and coating com- positions containing these dispersions. The invention relates to dispersions of crosslinked polymer micro-particles in aqueous media, which have been prepared: (1) by dispersing a mixture of the components (A) and (B) in an aqueous medium, the component (A) being com- posed of one or more polyester-polyols containing at least 2 hydroxyl groups, and the component (8) being composed of one or more polyisocyanate com- pounds in which the isocyanate groups are at least partially in the masked form, and the components (A) and/or (8) having available a number of ionic groups, preferably carboxylate groups, sufficient to form a stable dispersion, and at least one part of the components (A) and/or (8) containing more than 2 hydroxyl or optionally masked isocyanate, respec- tively, groups per molecule and (2) by subsequently heating the dispersion thus obtained to a temperature sufficiently high for the components (A) and (8) to react to form crosslinked polymer micro-particles.
530754
Dobbelstein Arnold
Hille Hans-Dieter
Mayenfels Peter
Muller Horst
Basf Lacke + Farben Aktiengesellschaft
Fetherstonhaugh & Co.
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