Poly (meth) acrylamides with improved color stability under ther

Details Poly (meth) acrylamides with improved color stability under ther Poly (meth) acrylamides with improved color stability under ther

1996-12-02

1998-11-17

Lipman, Bernard

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

Synthetic resins

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

5253305, 525340, C08F 832

Patent

active

058377808

ABSTRACT:
Molding compositions MC having a reduced tendency to yellow with thermal stress which consist of a polymer PM containing units of formula I: ##STR1## blending from 0.005-1 wt % of at least one reducing inorganic phosphorus compound IP selected from the group consisting of phosphinic and phosphonic acid and its alkali metal, alkaline-earth metal, a aluminum and ammonium salts, wherein the ammonium ion can be substituted with up to four C.sub.1 -C.sub.4 alkyl and/or C.sub.5 -C.sub.8 cycloalkyl groups, with the polymer PM after conclusion of the imidation reaction.

REFERENCES:
patent: 5280073 (1994-01-01), Siol et al.
patent: 5476907 (1995-12-01), Besecke et al.

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