Blends of poly(etheresters) and polyesters
AssigneeEastman Kodak Company
InventorsRobert W. Seymour, Thomas E. Flora
Life of this patent
Estimating the term…
Abstract
Disclosed are compositions comprising a blend of blends comprising (A) about 98-2 weight % of a flexible poly(etherester) having recurring units from 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70%, a glycol component consisting essentially of 1,4-cyclohexanedimethanol and poly(oxytetramethylene) glycol. (B) about 2-98 weight % of a relatively rigid polyester, the blends having improved stiffness and notched Izod impact strength when compared to the poly(etherester) alone.
Claims3
A composition comprising a blend of a flexible poly(etherester) with a more rigid polyester, the blend comprising
- (A) about 98-60 weight % of a flexible poly(etherester) having an I.V. of about 0.8-1.5 and recurring units from
- (1) a dicarboxylic acid component consisting essentially of 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70%,
- (2) a glycol component consisting essentially of
- (a) about 95 to about 65 mol % 1,4-cyclohexanedimethanol, and
- (b) about 5 to about 35 mol % poly(oxytetramethylene) glycol having a molecular weight of about 500-1100, and
- (B) about 2-40 weight % of a relatively rigid polyester consists essentially of recurring units of terephthalic acid, and recurring units from at least one of the glycols selected from ethylene glycol, 1,4-butanediol, and 1,4-cyclohexane-dimethanol,
- the blends having increased stiffness and notched Izod impact strength when compared to the poly(ether-ester) alone.
Dependencies are inferred from the claim text.