Vinyl pyrrolidone polymers substantially free of vinyl lactam mo

Details Vinyl pyrrolidone polymers substantially free of vinyl lactam mo Vinyl pyrrolidone polymers substantially free of vinyl lactam mo

1997-12-18

1998-11-03

Lipman, Bernard

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526271, 5263031, 5263183, 5263285, 526320, 526319, 526332, C08F22606, C08F22610, C08F22206, C08F22056, C08F22004, C08F22018, C08F22021

Patent

active

058309640

ABSTRACT:
This invention relates to substantially colorless and odorless vinyl lactam polymers containing less than 100 ppm residual vinyl pyrrolidone and less than 1000 ppm vinyl caprolactam monomers and to the process for producing said polymers in the above state of purity which comprises contacting a vinyl pyrrolidone and/or vinyl caprolactam polymer containing excessive residual monomer with between about 0.1 and about 9 wt. % of porous resin having a sulfonic and/or carboxylic functionality wherein said resin has a particle size between 5 and 500 mesh.

REFERENCES:
patent: 4743666 (1988-05-01), Engelhardt et al.

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