Thermosetting powder compositions for coatings
OwnerLuc Moens, Kris Buysens +1inventors
InventorsLuc Moens, Kris Buysens, Daniel Maetens
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Abstract
The present invention relates to an isophthalic acid rich carboxyl functionalised polyester, containing linear chain aliphatic diols, and to thermosetting powder compositions comprising a mixture of the polyester with a (3-hydroxyalkylamide group containing cross-linking agent. The invention also relates to the use of said compositions for the preparation of powdered paints and varnishes for the making of coatings and to coatings obtained therewith.
Claims9
A carboxylic acid group containing amorphous polyester having an acid number of from 12 to 34 mg KOH/g and prepared from a polyacid constituent comprising from 81 to 100% mole of isophthalic acid and from 0 to 19% mole of another aliphatic, cycloaliphatic or aromatic polyacid, and of a polyol constituent comprising from 15 to 65% mole of one or more linear chain aliphatic C4-C16 diol, from 35 to 85% mole of neopentyl glycol, from 0 to 50% mole of another linear chain aliphatic and/or cycloaliphatic diol and from 0 to 5% mole of a polyol with 3 or more hydroxyl groups.
Powdered thermosetting compositions, which comprise:
- a) a carboxylic acid group containing amorphous polyester according to any of the preceding claims
- b) a cross-linking agent having at least two μ-hydroxyalkylamide groups.
Dependencies are inferred from the claim text.