Shortstop agents for vinyl polymerizations

Details Shortstop agents for vinyl polymerizations Shortstop agents for vinyl polymerizations

1997-12-31

1999-03-09

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 82, 526 84, 526 85, 526335, 526340, 546242, C08F 242

Patent

active

058802304

ABSTRACT:
The present invention relates to a method of terminating a free-radical initiated emulsion polymerization by utilizing a shortstopping agent that contains a stable nitroxyl free-radical or is capable of forming a stable nitroxyl free radical in situ. Besides more effective stopping of polymerization, the present invention does not contain nitrosamine precursors nor is the shortstop agent easily removed during latex and polymer processing.

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SciFinder, Jul. 2, 1997, Abstracts Ger. Offen., 7 pp. Coden:GWXXBX.
De 3836777 A1 900503; Hoerpel, G.; Pangratz, J.; De 88-3836777 881028.
"Polymerization-Stopping Agents", G. J. Antlfinger & C. H. Lufter.
Rubber and Plastics News, Oct. 30, 1989, pp. 16-18; "Crosslinking systems that avoid nitrosamines"; pp. 1,5 OSHA might issue nitrosamine warning.

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