Expandable powder coating composition, method of coating a subst

Details Expandable powder coating composition, method of coating a subst Expandable powder coating composition, method of coating a subst

1988-12-02

1991-09-10

Hoke, Veronica P.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 94, 521141, 521155, 521161, 521170, 427 44, 427195, C08J 906

Patent

active

050474391

ABSTRACT:
An expandable, powder coating composition is disclosed which comprises (a) a thermoplastic resin containing a hydroxyl group-containing polymer, (b) a cross-linking agent containing a polyisocyanate compound which is capable of reacting with the hydroxyl groups of the polymer to crosslink the polymer at a temperature higher than the melting point of the thermoplastic resin and which is solid at room temperature, and (c) a blowing agent capable of decomposing and generating a gas when heated to a temperature higher than the melting point of the thermoplastic resin. Powder coating with the coating composition can give a heat-insulating, foamed sheath or lining over the surface of a metal tube or box to be used in air conditioners.

REFERENCES:
patent: 3632532 (1972-01-01), Gaeth et al.
patent: 3993849 (1976-11-01), Victorius
patent: 4246380 (1981-01-01), Gras et al.
patent: 4514546 (1985-04-01), Resz et al.
Organic Chemistry-Feiser & Feiser pp. 914-916, 1944 edition.
Textbook of Polymer Science-Fred W. Billmeyer, Jr. pp. 4, 406-410 (1966).

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