Powder coating composition

Details Powder coating composition Powder coating composition

1976-06-08

1978-02-14

Lilling, Herbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 47EC, 260 47EA, 260 47EN, 260 47UA, 260836, 526 16, 526 54, 526273, C08G 5184, C08G 4504, C08G 4500, C08F 2400

Patent

active

040737756

ABSTRACT:
A thermosetting powder coating composition having good handling characteristics and capable of being baked under relatively mild conditions and providing a coating having practically satisfactory properties. This coating composition is prepared by incorporating in 100 parts by weight of an epoxy group-containing acrylic or methacrylic copolymer having a glass transition point of 30.degree. to 90.degree. C. and a weight average molecular weight of 2,500 to 30,000, said copolymer consisting of 3 to 35% by weight of acrylate or methacrylate monomer units and 97 to 65% by weight of ethylenically unsaturated monomer units, 3 to 40 parts by weight of a specific diphenol having at its both terminals hydroxybenzoic acid ester structures as represented by the general formula: ##STR1## wherein R.sub.3 stands for a hydrocarbon radical having 2 to 20 carbon atoms or a linking group containing, at least at its both terminals, hydrocarbon radicals and in its main chain at least one member selected from the group consisting of an ether linkage, ester linkage, urethane linkage and amide linkage, and having totally 4 to 20 carbon atoms. Especially good results are obtained when a specific phenol compound containing in the molecule one phenolic hydroxyl group and either one carboxyl group or one hydroxyl group, or a specific benzoic acid compound containing in the molecule two carboxylic acid groups are further incorporated in this powder coating composition.

REFERENCES:
patent: 2934521 (1960-04-01), Masters
patent: 2935488 (1960-05-01), Phillips
patent: 2947717 (1960-08-01), Belanger et al.
patent: 3509230 (1970-04-01), Clarke
patent: 3752870 (1973-08-01), Labana
patent: 3753917 (1973-08-01), Spoelder
patent: 3758634 (1973-09-01), Labana et al.
patent: 3781380 (1973-12-01), Labana et al.
patent: 3787520 (1974-01-01), Labana et al.
"Advances in Chemistry" Series 125, Narajima pp. 98-107, ACS Washington, D.C. 1973, Myer Erzin Editor.

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