Fine particles of polyvinyl chloride and process for producing t

Details Fine particles of polyvinyl chloride and process for producing t Fine particles of polyvinyl chloride and process for producing t

1984-05-24

1985-02-26

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

524297, 428402, C08F11406

Patent

active

045018707

ABSTRACT:
Fine particles of polyvinyl chloride produced by bulk polymerization which comprise substantially discrete spherical particles with particle sizes of 0.2 to 2 microns, a plastisol prepared by adding 80 parts by weight of dioctylphthalate to 100 parts by weight of said particles having a viscosity of 50,000 centipoise or less (measured by a B-type viscometer, No. 4 rotor, 12 rpm, 25.degree. C.) and a process for producing the same which comprises subjecting vinyl chloride to bulk polymerization in the presence of a dispersing stabilizer under gentle stirring without causing sedimentation or agglomeration of the polymer particles formed, wherein polymerization is terminated at a polymerization yield of 5 to 30%.

REFERENCES:
patent: 2600122 (1952-06-01), Meyer et al.
patent: 3475398 (1969-10-01), Jobard
patent: 3725325 (1973-04-01), Takeda et al.
patent: 3725367 (1973-04-01), Kemp
patent: 3810958 (1974-05-01), Takahashi et al.
patent: 3933771 (1976-01-01), Eastman et al.
patent: 4145499 (1979-03-01), Nagano et al.

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