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AssigneeToray Industries, Inc.
InventorsKazumasa Chiba, Kazuhiko Kobayashi, Toshio Muraki
Estimating the term…
The aliphatic copolyesteramide having high degree of polymerization, is prepared by heating a mixture of (A) ester-forming components comprising (a) aliphatic diols and (b) aliphatic dicarboxylic acids and (B) amide-forming components comprising at least one component selected from the group consisting of (a) aliphatic .omega.-aminocarboxylic acids and (b) equimolar salt of (.alpha.) aliphatic diamines and (.beta.) aliphatic dicarboxylic acids, at temperatures of about 150.degree. to 260.degree. C., substantially under an atmospheric pressure, in the presence of catalyst and in the substantially absence of water, and subsequently heating the resulting esterified product at temperatures of about 200.degree. to 300.degree. C. under a reduced pressure. The obtained copolyesteramide can be formed into various molded articles, such as tubing, having excellent flexibility, toughness, shapability, chemical resistance, heat resistance, hydrolysis resistance and fatigue resistance.
A process for producing an aliphatic copolyesteramide which comprises heating a mixture comprising substantially
Tubing molded from aliphatic copolyesteramide comprising substantially (A) from about 5 to 50 percent by weight of ester unit represented by the following general formula (I) ##STR7## wherein k denotes an integer of 2 to 6 and l denotes an integer of 7 to 10, and
An aliphatic copolyesteramide comprising substantially (A) from about 5 to 50 percent by weight of ester unit represented by the following general formula (I) ##STR10## wherein k denotes an integer of 2 to 6 and l denotes an integer of 7 to 10, and
An aliphatic copolyesteramide comprising
A shaped article of aliphatic copolyesteramide comprising substantially (A) from about 5 to 50 percent by weight of ester unit represented by the following general formula (I) ##STR13## wherein k denotes an integer of 2 to 6 and l denotes an integer of 7 to 10, and (B) from about 95 to 50 percent by weight of at least one amide unit selected from the group consisting of (a) the unit represented by the following general formula (II), ##STR14## wherein m denotes an integer of 10 to 11, and (b) the unit represented by the following general formula (III) ##STR15## wherein n denotes an integer of 6 to 12 and p denotes an integer of 7 to 10.
Dependencies are inferred from the claim text.