Polyetherpolyamide elastomer having low water absorption
AssigneeUbe Industries, Ltd.
InventorsHiroshi Okushita, Tadao Muramatsu, Teruaki Fujii
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Abstract
Polyetherpolyamide elastomer showing a low water absorption, a high stress relaxation, and a high elastic recovery percentage of elongation is obtainable by polymerizing an aminocarboxylic acid compound and/or a lactam compound, a triblock polyetherdiamine compound having the following formula, and a dicarboxylic acid compound: 1 [x is a value of 1 to 20, y is a value of 4 to 50, z is a value of 1 to 20].
Claims12
Polyetherpolyamide elastomer obtainable by polymerization of a polyamide-forming compound selected from the group consisting of an aminocarboxylic acid compound having the following formula (A1) and a lactam compound having the following formula (A2), a triblock polyetherdiamine compound having the following formula (B), and a dicarboxylic acid compound having the following formula (C):
- 4 HOOC—(R3)m—COOH (C)
- in which each of R1, R2, and R3 independently represents a liking group having a hydrocarbon chain therein, x is a value in the range of 1 to 20, y is a value in the range of 4 to 50, z is a value in the range of 1 to 20, and m is 0 or 1.
Dependencies are inferred from the claim text.