Linear polyester coil coating compositions

Details Linear polyester coil coating compositions Linear polyester coil coating compositions

C - Chemistry, Metallurgy

08

G

117/192, 402/205

C08G 63/18 (2006.01) C08L 67/00 (2006.01)

Patent

CA 1117694

ABSTRACT OF THE DISCLOSURE Linear thermosettable polyester resin compositions are prepared from benzenedicarboxylic acid, an alkyl dicarboxylic acid, (e.g. 1,6-hexanedioic acid), and a short chain alkylene diol component (e.g. 2,2-dlmethyl-1,3-propanediol), the resin having a number average molecular weight of about 1,500 to about 5,000 and combined acid and hydroxyl values of about 20 to about 60 mg. of KOH per gram of polyester. When these polyesters are combined with an aminoplast and an acid catalyst they form coating compositions which, when applied to a substrate and cured, provide a coating having an outstanding combination of hardness, adhesion, extendability, flexibility and dry heat resistance.

327533

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