Process for preventing encrustations during the manufacture of p

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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C08F 218, C08F 1406

Patent

active

039950964

ABSTRACT:
Encrustations on reactor walls and associated equipment employed in the aqueous suspension polymerization of vinyl chloride and mixtures thereof with other monomers at 30.degree.-70.degree. C. are prevented by employing in the polymerization charge 0.0005 - 0.05% by weight of hydrogen peroxide, calculated on the monomer or monomers, preferably at a pH of at least 7.5, e.g., 7.5 - 8.5 when using a suspending agent which is sensitive to hydrolysis.

REFERENCES:
patent: 3663482 (1972-05-01), Gammon
patent: 3879363 (1975-04-01), Gammon et al.

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