Method of preparing aqueous solutions of polyvinyl-pyrrolidone h

Details Method of preparing aqueous solutions of polyvinyl-pyrrolidone h Method of preparing aqueous solutions of polyvinyl-pyrrolidone h

Filed on

1985-02-11

Date issued

1985-11-19

Examiner

Wong, Jr., Harry

Patent Class

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

SubClass

Synthetic resins

SubSubClass

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

Other Related Categories

524765, 524767, C08F12608, C08L 3906

Type

Patent

Status

active

Patent number

045543127

Description

ABSTRACT:
Vinylpyrrolidone is polymerized using free radical initiator consisting essentially of t-Butylperoxypivalate and preferably in solvent consisting essentially of water, isopropyl alcohol, sec. butyl alcohol or mixtures thereof.

REFERENCES:
patent: 3862915 (1975-01-01), Fried et al.
patent: 3910862 (1975-10-01), Barabas et al.
patent: 4027083 (1977-05-01), Herrle
patent: 4058655 (1977-11-01), Denzinger et al.
patent: 4361689 (1982-11-01), Patel et al.

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