Color minimization during melt preparation of polyamides with hy

Details Color minimization during melt preparation of polyamides with hy Color minimization during melt preparation of polyamides with hy

1989-06-09

1991-01-08

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

524606, 528347, C08G 6928

Patent

active

049837184

ABSTRACT:
A process for minimizing the formation of color during preparation of polyamides by interchange of diesters of dicarboxylic acids with diamines in the presence of hypophosphorous acid.

REFERENCES:
patent: 3723396 (1973-03-01), Jones et al.
patent: 4163101 (1979-07-01), Schade et al.
patent: 4495328 (1985-01-01), Poppe et al.
patent: 4567249 (1986-01-01), Fox et al.

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