Stabilized aqueous solution of a C.sub.1 -C.sub.5 alkyl vinyl et

Details Stabilized aqueous solution of a C.sub.1 -C.sub.5 alkyl vinyl et Stabilized aqueous solution of a C.sub.1 -C.sub.5 alkyl vinyl et

1991-09-18

1993-05-25

Michl, Paul R.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524419, 524421, 524556, 524549, 526271, 5263182, C08K 330, C08F 2204

Patent

active

052140890

ABSTRACT:
What is provided herein is a stabilized aqueous solution of a C.sub.1 -C.sub.5 alkyl vinyl ether and maleic acid copolymer which includes about 10-500 ppm of an inorganic reducing agent as a stabilizing additive, said reducing agent being effective to prevent oxygen from the air and peroxides contained in polymer system from degrading the copolymer. Preferably the reducing agent is sulfur dioxide and salts derived from sulfur dioxide and alkali metals such as, sodium or potassium bisulfite, sodium or potassium metabisulfite, sodium or potassium thiosulfite, or sodium or potassium sulfite.

REFERENCES:
patent: 4396734 (1983-08-01), Williams et al.
patent: 4581405 (1986-04-01), Martischius et al.
patent: 4863989 (1989-09-01), Obayashi et al.

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