Process for producing vinyl chloride polymer

Details Process for producing vinyl chloride polymer Process for producing vinyl chloride polymer

1991-10-22

1992-07-14

Henderson, Christopher

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526200, 526201, 526202, 526209, 526322, 5263232, C08F 220

Patent

active

051303876

ABSTRACT:
A process for producing a vinyl chloride polymer for matted moldings which comprises performing the suspension polymerization of vinyl chloride monomer or a mixture of vinyl monomers composed mainly of vinyl chloride in an aqueous medium, said suspension polymerization being performed after the addition of an aqueous dispersion obtained by dispersing a polyfunctional monomer having 2 or more ethylenic double bonds in the molecule into an aqueous solution of a water-soluble partially saponified polyvinyl alcohol, a water-soluble cellulose eter or an emulsifier, thereby yielding a vinyl chloride resin composed of 5 to 90 wt % tetrahydrofuran-insoluble gel fraction, with the remainder being tetrahydrofuran-solubles.

REFERENCES:
patent: 2647101 (1953-07-01), Humphrey
patent: 3230203 (1966-01-01), Kuhne
patent: 4340530 (1982-07-01), Higashiguchi
patent: 4816539 (1989-03-01), Watanabe

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