Preparation of a multicoat coating, water-thinnable coating comp

Details Preparation of a multicoat coating, water-thinnable coating comp Preparation of a multicoat coating, water-thinnable coating comp

1994-06-24

1997-06-03

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525162, 525191, 4274071, 4284242, C08L 3304

Patent

active

056355645

ABSTRACT:
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.sub.G1) of +30.degree. to +110.degree. 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.sub.G2) of -60.degree. to +20.degree. C. The hydroxyl value of the emulsion polymer is between 2 and 100.

REFERENCES:
patent: 4539363 (1985-09-01), Backhouse
patent: 4565730 (1986-01-01), Pota et al.

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