Silicone-ester powder coating compositions

Details Silicone-ester powder coating compositions Silicone-ester powder coating compositions

1986-06-02

1987-07-28

Marquis, Melvyn I.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525440, 525443, 525446, 528 25, 528 26, 528 29, C08G 6532

Patent

active

046832718

ABSTRACT:
New siloxane-esters, useful as powder coating resins, are prepared by random condensation polymerization of a hindered glycol and a hydroxy functional silicone having about two ##STR1## groups per molecule wherein R is lower alkyl or phenyl groups and the remaining silicone valences form ring-structured siloxanes. Improved powder properties, including tack temperatures of 150.degree. F. to 220.degree. F., are believed to result in part from the hindered glycols especially those having carboxylic functionality.

REFERENCES:
patent: 4525535 (1985-06-01), Craun et al.
patent: 4608421 (1986-08-01), Lin

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