Process for increasing polyamide molecular weight with organopho

Details Process for increasing polyamide molecular weight with organopho Process for increasing polyamide molecular weight with organopho

1991-08-28

1992-08-25

Anderson, Harold D.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524 99, 524124, 524606, 524419, C08G 6948

Patent

active

051420007

ABSTRACT:
A process for increasing the molecular weight of a polyamide in the presence of alumina-containing titanium dioxide, said process comprising heating a polyamide containing terminal carboxy and amino groups, and alumina-containing titanium dioxide, in the presence of a catalytically effective quantity of at least one phosphonic acid catalyst and/or ester thereof selected from:

REFERENCES:
patent: 4912175 (1990-03-01), Wheland et al.
patent: 4966949 (1990-10-01), Wheland

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