Polyacrylonitriles with a low K value, a process for their prepa

Details Polyacrylonitriles with a low K value, a process for their prepa Polyacrylonitriles with a low K value, a process for their prepa

1986-02-21

1987-07-28

Schofer, Joseph L.

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

Synthetic resins

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

5253292, 5253293, 525344, 525368, 525369, 5263293, C08F 812

Patent

active

046832866

ABSTRACT:
The invention relates to homopolymers and copolymers of acrylonitrile with very low Fikentscher K values of 34-15 and a total content of sulfonate and sulfate end groups, which do not originate from correspondingly substituted comonomers, of 250 to 1,000 milliequivalents per kilogram of polymer, 180 to 900 milliequivalents per kilogram being in the form of sulfonate end groups, and to suitable semi-continuous or continuous precipitation polymerization processes for their preparation by means of a redox system in an aqueous medium.
The resulting polymers can be extruded to shaped articles. In particular, after hydrolysis, they can be used as emulsifiers and deep bore auxiliaries.

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