Increasing the molecular weight of polyamides

Details Increasing the molecular weight of polyamides Increasing the molecular weight of polyamides

1994-05-27

1996-03-05

Hampton-Hightower, P.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528310, 528322, 528480, 528492, 525419, 525420, 524 99, 524115, 524130, C08G 6391, C08G 6948

Patent

active

054969204

ABSTRACT:
An increase in the molecular weight of newly produced polyamides and recycled polyamide materials can be achieved by heating to above the melting point or glass transition point and adding of a bismaleimide and a sterically hindered hydroxyphenyl-alkyl-phosphonic acid ester or half-ester.

REFERENCES:
patent: 4912175 (1990-03-01), Wheland et al.
patent: 5116919 (1992-05-01), Buzinkai et al.
patent: 5142000 (1992-08-01), Wheland
patent: 5250619 (1993-10-01), Heinz et al.
Webster's 7th New Collegiate Dictionary, G & C Merriam Company, Publishers, Springfield, Mass., 1970, p. 384.
S. Fakirov in Kunststoffe 74; (1984) 218-221.
R. E. Gru/ tzner, et al. Kunststoffe 82 (1992) pp. 284-288.

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