Polycarbodiimide copolymer and production method thereof

Details Polycarbodiimide copolymer and production method thereof Polycarbodiimide copolymer and production method thereof

2006-04-25

2006-04-25

Hightower, P. Hampton (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C528S044000, C528S045000, C528S170000, C528S322000, C528S353000, C525S452000

Reexamination Certificate

active

07034101

ABSTRACT:
A polycarbodiimide copolymer which comprises at least one structural unit selected from rubber residues represented by the following formulae (1) and (2) in a number “m”:and a structural unit represented by the following formula (3) in a number “n”:and which comprises on both termini a terminal structural unit derived from a monoisocyanate, wherein m is an integer of 2 or more, n is an integer of 1 or more, m+n is from 3 to 1,500 and m/(m+n) is from 1/1,500 to ⅓. The polycarbodiimide is capable of keeping the inherent heat resistance and also showing excellent flexibility. Films and molding materials having high heat resistance and flexibility can be obtained.

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European Search Report dated Jul. 28, 2004.

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