Method for the preparation of polyvinyl chloride resin

Details Method for the preparation of polyvinyl chloride resin Method for the preparation of polyvinyl chloride resin

1992-08-27

1994-02-15

Henderson, Christopher

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526202, C08F 220

Patent

active

052867960

ABSTRACT:
An improvement is proposed in the suspension polymerization of vinyl chloride monomer in order to obtain a polyvinyl chloride resin powder having good absorptivity of plasticizers by virtue of the well developed porosity of the resin particles and containing a decreased amount of fish eyes. The improvement comprises adding, to the polymerization mixture, a water-insoluble partially saponified polyvinyl acetate having an average degree of polymerization of at least 1000 and a degree of saponification of 20 to 60% in combination with a conventional water-soluble polymer as the suspending agent such as water-soluble partially saponified polyvinyl acetates and water-soluble cellulose ethers.

REFERENCES:
patent: 4845174 (1989-07-01), Amano
patent: 5153284 (1992-10-01), Amano

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