Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1996-02-06
2000-06-13
Dawson, Robert
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525533, 525934, 528112, 528297, C08F 2000
Patent
active
060750995
ABSTRACT:
A curable epoxidized polyester-based composition useful for powder coatings application is provided by epoxidizing a polyester having a melting point of at least 90.degree. C. and a viscosity of at most 50 Poise@ 200.degree. C., where such polyester is a polyester prepared by reacting (I) a tetrahydrophthalic acid or anhydride, (ii) at least one cycloaliphatic polyol, (iii) at least one saturated polycarboxylic acid, and (iv) optionally at least one other alcohol under conditions effective to obtain a solid polyester having a melting point of at least 90.degree. C. Curable coating powder is obtained containing the epoxidized polyester and a solid carboxylic acid curing agent having an acid equivalent weight within the range of from about 100 to about 1500.
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Marx Edward John
Stark Charles John
Aylward D.
Dawson Robert
Shell Oil Company
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