C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
117/152, 402/397
C08F 2/24 (2006.01) B05D 1/36 (2006.01) B05D 3/02 (2006.01) B05D 7/00 (2006.01) C08F 265/04 (2006.01) C09D 5/02 (2006.01) C09D 151/00 (2006.01)
Patent
CA 2004988
a process for the preparation of multicoat coatings in which a pigmented aqueous basecoat composition is used which comprises a water-thinnable emulsion polymer as the film-former. The water-thinnable emulsion polymer is prepared in a two-stage emulsion polymerization. The first stage gives rise to a polymer having a glass transition temperature (T G1) of +30 to +110°C. In the second stage a mixture of monomers is polymerized in the presence of the polymer prepared in the first stage which by an exclusive polymerization gives rise to a polymer having a glass transition temperature (T G2) of -60 to +20°C. The hydroxyl value of the emulsion polymer is between 2 and 100.
Dobbelstein Arnold
Niemann Jurgen
Wieditz Stefan
Basf Lacke + Farben Aktiengesellschaft
Fetherstonhaugh & Co.
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