Process for the preparation of matte coatings using powdered the

Details Process for the preparation of matte coatings using powdered the Process for the preparation of matte coatings using powdered the

1995-01-13

1996-06-11

Beck, Shrive

Coating processes

Solid particles or fibers applied

Uniting particles to form continuous coating with...

427485, 427486, B05D 302

Patent

active

055253709

ABSTRACT:
A process for the preparation of a matte coating on an article is described, which comprises applying to said article a powdered thermosetting composition comprising as binder a mixture of a linear carboxyl group-containing polyester and a glycidyl group-containing acrylic copolymer and curing the thus coated article at a temperature of from 160.degree. C. to 210.degree. C. for a period of up to about 30 minutes. The polyester has an acid number of 20 to 50 mg KOH/g, and is the esterification product of a hydroxyl group-containing polyester with an organic dicarboxylic acid. The acrylic copolymer is obtained from 5% to 30% by weight of glycidyl acrylate or glycidyl methacrylate and 70% to 95% by weight of methyl methacrylate, whereby up to 25% of the total weight of methyl methacrylate can be replaced by another vinyl monomer, said acrylic copolymer having a number-average molecular weight (Mn) of from about 4,000 to about 10,000.

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