Copolyester

Details Copolyester Copolyester

C - Chemistry, Metallurgy

08

G

402/201, 190/26

C08G 63/13 (2006.01) B65D 1/00 (2006.01) C08G 63/685 (2006.01) C08G 63/78 (2006.01) C08G 73/16 (2006.01)

Patent

CA 2024689

Abstract of the Disclosure COPOLYESTER It has been determined that the glass transition temperature of polyesters can be increased by incorporating certain imide-containing diacid monomers therein. This invention specificaLly discloses a copolyester which is comprised of repeat units which are derived from (a) a diol component and (b) a diacid component which is comprised of (1) from about 1 to about 15 mole percent of at least one imide-containing diacid monomer having the structural formula: Image wherein R represents an alkylene group, a substituted alkylene group, an arylene group, or a substituted arylene group, and (2) from about 85 to about 99 mole percent terephthalic acid or a diester thereof. N,N'-bis(1,3-methylene)cyclohexane bis-(trimellitimide) is a highly preferred imide-containing diacid monomer which can be utilized in making the polyesters of this invention.

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