Preparation of a polyvinylpyrrolidone by heat treatment of an aq

Details Preparation of a polyvinylpyrrolidone by heat treatment of an aq Preparation of a polyvinylpyrrolidone by heat treatment of an aq

1982-03-15

1984-02-21

Wong, Jr., Harry

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

Synthetic resins

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

524548, 525263, 525283, 525387, 526264, C08F 800, C08F12610

Patent

active

044331126

ABSTRACT:
A process for the preparation of high-viscosity polyvinylpyrrolidone, wherein an aqueous polyvinylpyrrolidone solution is subjected to a heat treatment in the presence of a water-insoluble peroxide and in the absence of oxygen, and thickeners containing the polyvinylpyrrolidone thus prepared.

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patent: 3459720 (1969-08-01), Grosser et al.
patent: 3862915 (1975-01-01), Fried et al.
patent: 4053696 (1977-10-01), Herrle et al.
patent: 4058655 (1977-11-01), Denzinger et al.
patent: 4182851 (1980-01-01), Straub et al.
patent: 4190718 (1980-02-01), Lorenz et al.
patent: 4254239 (1981-03-01), Straub et al.

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