Thermoplastic polyester copolymer
AssigneeDaicel Chemical Industries, Ltd.
InventorYuzo Toga
Life of this patent
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Abstract
A thermoplastic polyester copolymer comprises units derived from (A) terephthalic acid, a diol mixture of (B-1) 60 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 40 mol % of 1,4-cyclohexanedimethanol, or (B-2) 5 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 95 mol % of tetramethyleneglycol, and (C) 5 to 50 wt. %, based on the copolymer, of a polyalkylene ether glycol phthalate having a number-average molecular weight of 500 to 3000 in the polyalkylene ether glycol block thereof.
Claims9
A thermoplastic polyester copolymer which comprises polyester recurring unis prepared by reacting
- (A) a dicarboxylic acid component consisting essentially of 50 to 100 mol % of terephthalic acid or lower alkylester thereof and 0 to 50 mol % of isophthalic acid or lower alkyl ester thereof, and (B) a diol component selected from the group consisting of
- (B-1) a mixture consisting essentially of 60 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 40 mol % of 1,4-cyclohexane dimethanol, and
- (B-2) a mixture consisting essentially of 5 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 95 mol % of tetramethylene glycol, and polyether recurring units prepared by reacting said dicarboxylic acid component (A) with (C) a polyalkylene ether glycol having a number-average molecular weight of 500 to 3000, wherein the amount of said polyether recurring units is from 5 to 50 wt. %, based on the sum of the weights of said polyester recurring units and said polyether recurring units.
A thermoplastic polyester copolymer consisting essentially of irregularly distributed recurring units A, B, C, D, E and F having the formulas:
- ##STR3## wherein R is alkyl having 2 to 6 carbon atoms and n is a positive integer such that -RO).sub.n has a molecular weight of 500-3000, and wherein the mole percent ratio of (A+B+C)/(D+E+F)=50-100/0-50, the mole percent ratio of (A+D)/(B+E)=60-95/5-40 and the weight of (C+F) is from 5 to 50% of the weight of (A+B+C+D+E+F).
A thermoplastic polyester copolymer consisting essentially of irregularly distributed recurring units A, B, C, D, E and F having the formulas:
- ##STR4## wherein R is alkyl having 2 to 6 carbon atoms and n is a positive integer such that -RO).sub.n has a molecular weight of 500-3000, and wherein the mole percent ratio of (A+B+C)/(D+E+F)=50-100/0-50, the mole percent ratio of (A+D)/(B+E)=5-95/5-95 and the weight of (C+F) is from 5 to 50% of the weight of (A+B+C+D+E+F).
Dependencies are inferred from the claim text.