Copolyester composition containing poly(ethylene cyclohexane dimethylene terephthalate), having superior solvent and impact resistance
AssigneeBaxter Travenol Laboratories, Inc.
InventorsT. Michael Dennehey, Dwight Dixon
Life of this patent
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Abstract
A copolyester compositon which exhibits good bonding characteristics to polyvinyl chloride, good impact resistance, and improved resistance to crazing or cracking in the presence of solvents such as alcohol. The composition consists essentially of (a) 80 to 95 percent by weight of a generally rigid poly(ethylene cyclohexanedimethylene terephthalate) in which from 2 to 20 molar parts of ethylene units are present per one molar part of cyclohexanedimethylene units, and (b) from 5 to 20 percent by weight of a flexible copolymer containing alternating covalently bonded blocks of poly(butylene terephthalate) and poly(1,4-butylene ether).
Claims7
A copolyester composition which exhibits good bonding characteristics to polyvinyl chloride plastics, good impact resistance, and improved resistance to alcohols, which consists essentially of:
- (a) from 80 to 95 percent by weight of a generally rigid poly(ethylene cyclohexanedimethylene terephthalate) in which from 2 to 20 molar parts of ethylene units are present per one molar part of cyclohexane dimethylene units;
- and
- (b) from 5 to 20 percent by weight of flexible copolymer containing alternating covalently bonded blocks of poly(butylene terephthalate) and poly(1,4-butylene oxide).
Dependencies are inferred from the claim text.