Method of preparing modified or unmodified poly-(alkylpentamethy

Details Method of preparing modified or unmodified poly-(alkylpentamethy Method of preparing modified or unmodified poly-(alkylpentamethy

1977-06-03

1979-07-31

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

526 71, 528324, 528349, C08G 6928

Patent

active

041631013

ABSTRACT:
A process for preparing a poly-(alkylpentamethyleneterephthalamide) which comprises heating an aqueous solution of the corresponding nylon salt and still water soluble low molecular weight oligomer, the mixture of nylon salt and oligomer having 20 to 50 mole percent carbonamide groups and 50 to 80 mole percent salt groups, from a temperature at least as low as 150.degree. C. at atmospheric pressure up to a polycondensation temperature of at least 250.degree. C.

REFERENCES:
patent: 3379695 (1968-04-01), Wolfes et al.
patent: 3442869 (1969-05-01), Wolfes et al.
patent: 3459714 (1969-08-01), Wolfes et al.
patent: 3516972 (1970-06-01), Wolfes et al.

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