Method of producing polyester powdery coating material

Details Method of producing polyester powdery coating material Method of producing polyester powdery coating material

2007-03-20

2007-03-20

Wu, David W. (Department: 1713)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S340000, C523S348000, C525S165000, C525S172000, C525S173000, C525S174000, C525S176000, C525S437000, C525S438000, C525S439000, C525S440030, C525S448000

Reexamination Certificate

active

10960925

ABSTRACT:
Disclosed is a method of producing a powdery coating material by using: a curable polyester resin (A) having a hydroxyl group and/or a carboxyl group at the terminals thereof, and further having a number average molecular weight of from 1,000 to 30,000, a glass transition temperature of from 30 to 100° C.; a curing agent (B) which is solid at normal temperature and is capable of being reacted with the hydroxyl group or the carboxyl group of the curable polyester resin (A); and a solvent (C) having a boiling point under normal pressure of from 50 to 130° C.; and comprising a step of kneading the curable polyester resin (A), the curing agent (B) and the solvent (C) under condition in which at 50 to 130° C., not less than 20% by weight of the curing agent (B) is dissolved in the solvent and, then, vapor-removing the solvent (C) under a reduced pressure.

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Abstract, XP-002211243 & JP 053729 (1 pg.).
Abstract, XP-002211244 & JP 302567 (1 pg.).
Abstract, JP11302567 (1 pg.).

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