Thermosettable polyester resin compositions

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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Details

260 40R, 4273855, 528302, 528308, C08G 6376, C08G 6318

Patent

active

042385830

ABSTRACT:
There are disclosed thermosettable polyester resins which are the reaction products of specified amounts of a benzenedicarboxylic acid component (e.g.: 1,3-benzenedicarboxylic acid), a trihydroxy alkyl component (e.g.: 2-ethyl-2-(hydroxymethyl)-1,3-propanediol), a short chain alkylene diol component having four or fewer carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g.: 2,2-dimethyl-1,3-propanediol), a dihydroxy alkyl constituent having four to ten carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g.: 1,6-hexanediol), and optionally, an alkyl dicarboxylic acid component (e.g.: 1,6-hexanedioic acid). Such polyesters, having a number average molecular weight of from about 400 to about 1400, a combined acid and hydroxyl number of about 50 to about 250 milligrams of KOH per gram of polyester, and a glass transition temperature of about -15.degree. to +25.degree. C., are found to be especially useful in high solids content coating formulations.

REFERENCES:
patent: 3678128 (1972-07-01), Riemhofer et al.
patent: 3804920 (1974-04-01), Cunningham et al.
patent: 3852375 (1974-12-01), Biethan et al.
patent: 3957709 (1976-05-01), Holzrichter et al.
patent: 4113793 (1978-09-01), Sekmakas
patent: 4123404 (1978-10-01), Lasher

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