Polycarboxylic acids with small amount of residual monomer

Details Polycarboxylic acids with small amount of residual monomer Polycarboxylic acids with small amount of residual monomer

1987-02-24

1988-07-19

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526216, 5263171, C08F 200

Patent

active

047586419

ABSTRACT:
A polymer of an olefinically unsaturated carboxylic acid containing 3 to 5 carbon atoms is prepared which contains less than 0.2% by weight unreacted monomer in a solvent selected from acetone and lower alkyl acetates also in the presence with less than 5% of a crosslinker selected from polyalkenyl polyethers of polyhydric alcohols containing more than one alkenyl group per molecule wherein the polyhydric alcohol contains at least 4 carbon atoms and at least 3 hydroxyl groups and initiator selected from peroxides and peroxydicarbonates. Polymerization temperature is 40.degree. to 85.degree. C. and viscosity of the mixture after completing polymerization is less than 1000 cps. About 1 to 10% of the carboxyl groups on the polymer are neutralized.

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