Polymerization process using PVP-H.sub.2 O.sub.2 as free radical

Details Polymerization process using PVP-H.sub.2 O.sub.2 as free radical Polymerization process using PVP-H.sub.2 O.sub.2 as free radical

1992-01-15

1992-10-27

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526264, 526271, C08F 206

Patent

active

051590336

ABSTRACT:
A process is described for carrying out aqueous and non-aqueous polymerization of polymerizable monomers, particularly vinyl monomers, and, preferably, vinylpyrrolidone, in the presence of a mixture of a stable, high purity, free-flowing, fine white powder of a substantially anhydrous 1:1 molar ratio complex of polyvinylpyrrolidone-hydrogen peroxide (PVP--H.sub.2 O.sub.2), respectively, and a transition metallic ion, as a free radical initiator, is described herein. Preferred polymerizations are the homopolymerization of vinylpyrrolidone and the copolymerization of maleic anhydride and a C.sub.1 -C.sub.5 alkyl vinyl ether.

REFERENCES:
patent: 2789099 (1957-04-01), Rife et al.
patent: 3480557 (1969-11-01), Shiraeff

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