Suspension polymerization process for making vinyl resins for us

Details Suspension polymerization process for making vinyl resins for us Suspension polymerization process for making vinyl resins for us

1979-08-23

1982-03-09

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

525 56, 526 74, 5263442, 524313, 524306, C08F 220

Patent

active

043190120

ABSTRACT:
This invention relates to making dense, spherical particles of vinyl plastisol resins by means of a suspension polymerization procedure. The dense, spherical particles or beads have a diameter of about 10 to about 100 microns and are made in an aqueous medium containing a free-radical yielding polymerization catalyst and in the presence of polyvinyl alcohol, as a suspending agent, and a surfactant having a hydrophile-lipophile balance (HLB) less than about 3.5. The suspension vinyl resins so produced are easily and uniformly mixed with a plasticizer to form low viscosity plastisols which are stable, containing particles of uniform and proper size and capable of producing films, and like products, of good clarity.

REFERENCES:
patent: 3671508 (1972-06-01), Koyanagi et al.
patent: 3825509 (1974-07-01), Miller
patent: 3862066 (1975-01-01), Reiter et al.

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