Thermosetting powder coating polyesters

Details Thermosetting powder coating polyesters Thermosetting powder coating polyesters

1978-04-14

1980-04-08

Danison, Walter C.

Stock material or miscellaneous articles

Composite

Of metal

428482, 528305, 528309, 525437, B32B 1508, C08G 6318, C08G 6376

Patent

active

041973534

ABSTRACT:
Thermosettable polyester resin compositions, suitable for use in powder coating applications, derived from a dicarboxylic aromatic acid component (e.g., 1,4-benzenedicarboxylic acid), a trihydroxy alkyl component (e.g., 2-ethyl-2-(hydroxymethyl)-1,3-propanediol), a diol component (e.g., 2,2-dimethyl-1,3-propanediol) and a dihydroxy alkyl compound having 4 to 10 carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g., 1,6-hexanediol). Polyesters of the present invention have a number average MW of from about 2,000 to about 6,000, a combined acid and hydroxyl number of about 35 to about 70 milligrams of KOH per gram of polyester, and a glass transition temperature of about 35.degree. C. to about 50.degree. C.

REFERENCES:
patent: 3686360 (1972-08-01), Cunningham
patent: 3725340 (1973-04-01), Erdmenger et al.
patent: 3842021 (1974-10-01), Grant et al.
Nakamura et al., Chemical Abstracts, vol. 85:48,423x (1976).

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