Polyether-ester amide and process for preparation thereof
AssigneeToray Industries, Inc.
InventorsChiaki Tanaka, Shinobu Nakashima
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Abstract
An improved polyether-ester amide is prepared by mixing (A) an aminocarboxylic acid, (B) a poly(alkylene oxide)glycol having a number-average molecular weight of 300 to 6,000 and (C) a dicarboxylic acid at such a mixing ratio that the amount of the component (B) is 5 to 90% by weight based on the total amount and the amino, carboxyl and hydroxyl groups in the mixture satisfy the following requirement: 0.95.ltoreq.[COOH]/([NH.sub.2 ]+[OH]).ltoreq.1.05 heating the mixture at 150.degree. to 260.degree. C. and then polymerizing the mixture at 220.degree. to 300.degree. C. under high vacuum. This polyether-ester amide is excellent in the impact resistance and rubbery elasticity.
Claims13
A polyether-ester amide obtained by mixing an aminocarboxylic acid (A) having 6 to 20 carbon atoms, a poly(alkylene oxide)glycol (B) having a number-average molecular weight of 300 to 6,000 and a dicarboxylic acid (C) having 4 to 20 carbon atoms, heating the mixture without the addition of water, under normal pressure at 150.degree. to 260.degree. C. and then polymerizing the mixture at 220.degree. to 300.degree. C. under high vacuum, wherein the amino, carboxyl and hydroxyl groups in the mixture of the components (A), (B) and (C) satisfy the following requirement:
- 0.95.ltoreq.[COOH]/([NH.sub.2 ]+[OH]).ltoreq.1.05
- and the amount of the component (B) is 5 to 90% by weight based on the total amount.
A process for the preparation of polyether-ester amides, which comprises mixing an aminocarboxylic acid (A) having 6 to 20 carbon atoms, a poly(alkylene oxide)glycol (B) having a number-average molecular weight of 300 to 6,000 and a dicarboxylic acid (C) having 4 to 20 carbon atoms, heating the mixture without the addition of water, under normal pressure at 150.degree. to 260.degree. C. and then polymerizing the mixture at 220.degree. to 300.degree. C. under high vacuum, wherein the amino, carboxyl and hydroxyl groups in the mixture of the components (A), (B) and (C) satisfy the following requirement:
- 0.95.ltoreq.[COOH]/([NH.sub.2 ]+[OH].ltoreq.1.05
- and the amount of the component (B) is 5 to 90% by weight based on the total amount.
Dependencies are inferred from the claim text.