Method of production of polyvinyl chloride resin for paste proce

Details Method of production of polyvinyl chloride resin for paste proce Method of production of polyvinyl chloride resin for paste proce

1993-03-31

1994-09-20

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528486, 528487, C08F 616

Patent

active

053490495

ABSTRACT:
A method of production of polyvinyl chloride resin for paste processing comprises recovering in 98% or more the polyvinyl chloride resin from an aqueous dispersion of the polyvinyl chloride resin for paste processing as aggregates by adding an organic fluid which is at most barely soluble in water and does not dissolve or swell the polyvinyl chloride resin to the aqueous dispersion in the presence of an aggregating agent, followed by separating the aggregated polyvinyl chloride resin particles from the aqueous phase of the aqueous dispersion. By the addition of the aggregating agent, dispersion of the resin particles into a medium is improved, fluidity of a sol thereof and the physical properties of molded articles formed therefrom are improved and blocking during the drying process is prevented.

REFERENCES:
patent: 2674585 (1954-04-01), Condo et al.
patent: 3052663 (1962-09-01), Bodlaender et al.
patent: 4803260 (1989-02-01), Nishina et al.
Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, N.Y., 1987, 11th ed., pp. 512 & 514.
Grant & Hackh's Chemical Dictionary, McGraw-Hill, N.Y., 1987, 5th Ed., p. 238.

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