Claims
- 1. A powder coating composition consisting essentially of a melt-blended resin of:
- (i) 65% to 95% by weight of a polyester resin comprising terephthalic acid as a main acid component and a dihydric alcohol as a main alcohol component and having a hydroxyl number of 20 to 100 and an acid value of 1 to 20;
- (ii) 4% to 30% by weight of a blocked isocyanate; and
- (iii) 0.2% to 30% by weight of a non-rubbery acrylic resin having a glass transition temperature of 40.degree. C. to 85.degree. C. and having at least one hydroxyl group and at least one glycidyl group.
- 2. A powder coating composition as claimed in claim 1, wherein said acrylic resin has a hydroxyl number of 5 to 150, a glycidyl group content of 3.5.times.10.sup.-3 g equivalent/g or less, and a weight-average molecular weight of 3000 to 50000.
- 3. A powder coating composition as claimed in claim 1 wherein the melt-blended resin further contains a pigment.
Parent Case Info
This application is a continuation of U.S. patent application Ser. No. 851,115, filed Apr. 10, 1986, now abandoned, which in turn is a continuation of U.S. patent application Ser. No. 673,262, filed Nov. 20, 1984, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1208585 |
Oct 1970 |
GBX |
Continuations (2)
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Number |
Date |
Country |
Parent |
851115 |
Apr 1986 |
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Parent |
673262 |
Nov 1984 |
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