Preparation of water-soluble polymer powders and their use

Details Preparation of water-soluble polymer powders and their use Preparation of water-soluble polymer powders and their use

1986-04-29

1987-06-02

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526909, C08F 428

Patent

active

046705244

ABSTRACT:
Water-soluble polymer powders are prepared by polymerizing water-soluble ethylenically unsaturated monomers in a powder bed in the presence of polymerization initiators and water while maintaining the powder state, removing the heat of polymerization by distilling off water and circulating the reaction mixture, by a process in which water-insoluble organic peroxides which are liquid at 20.degree. C. are used alone or as a mixture with up to 50% by weight, based on the initiator mixture, of water-soluble, organic azo initiators and/or water-insoluble solid peroxy-containing compounds, as polymerization initiators.

REFERENCES:
patent: 4135043 (1979-01-01), Kast
patent: 4247434 (1981-01-01), Lovelace
patent: 4458057 (1984-07-01), Basu

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