Process for increasing the relative viscosity of polyamides with

Details Process for increasing the relative viscosity of polyamides with Process for increasing the relative viscosity of polyamides with

1990-12-05

1992-05-26

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 86, 524 96, 524 99, 524115, 524130, 524148, 525419, 528487, 528492, C08G 6948

Patent

active

051169193

ABSTRACT:
A process for increasing the relative viscosity of a polyamide includes heating the polyamide in the presence of a base and a catalyst with the catalyst being at least one compound of the formula:

REFERENCES:
patent: 3872055 (1975-03-01), Furukawa et al.
patent: 3947424 (1976-03-01), Tomek
patent: 4543407 (1985-09-01), Curatolo et al.
patent: 4912175 (1990-03-01), Wheland et al.
patent: 4966949 (1990-10-01), Wheland
Roczniki Chemii Ann. So. Chim. Polonorum, 37, 1315 (1963)--E. Maruzewska-Wieczorkowska and J. Michalski.
J. Chem. Soc., 4154 (1957)--J.I.G. Cadogan.

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