Powder coating compositions containing copolymers having hydroxy

Details Powder coating compositions containing copolymers having hydroxy Powder coating compositions containing copolymers having hydroxy

1997-05-13

1998-03-17

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526320, 5263285, 5253274, 5253276, 525310, 525340, 525379, C08F22204, C08F22026, C08F22018

Patent

active

057287899

ABSTRACT:
The present invention relates to powder coating compositions wherein the binder contains copolymers which are solid below 30.degree. C., prepared from olefinically unsaturated compounds and have a weight-average molecular weight (M.sub.w) of 1500 to 75,000, a content of free hydroxyl groups of 0.2 to 6.0% by weight and a content of intramolecular carboxylic acid anhydride groups (calculated as C.sub.4 H.sub.2 O.sub.3) of 1 to 30% by weight.

REFERENCES:
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patent: 3784396 (1974-01-01), Fourment et al.
patent: 3976717 (1976-08-01), Labana et al.
patent: 4211691 (1980-07-01), FitzGerald et al.
patent: 4388451 (1983-06-01), Culbertson et al.
patent: 4562117 (1985-12-01), Kikukawa et al.
patent: 4605597 (1986-08-01), Ogawa et al.
patent: 4694037 (1987-09-01), Ofstead et al.
patent: 4861841 (1989-08-01), Marrion
Derwent Abstract No. 88-123,693, Mar. 28, 1988.

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