Process of producing vinyl chloride polymer

Details Process of producing vinyl chloride polymer Process of producing vinyl chloride polymer

1995-07-21

1997-01-28

Weber, Thomas R.

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

Synthetic resins

Polymerizing in reactor of specified material, or in reactor...

5263442, 526345, C08F 216, C08F 1406

Patent

active

055978789

ABSTRACT:
A process for the production of a vinyl chloride polymer by suspension polymerization of vinyl chloride, optionally in the presence of other vinyl monomers, in an aqueous medium, in the presence of an oil-soluble polymerization initiator, which is a combination of (A) t-butyl peroxyneoheptanoate, and (B) a peresteric peroxide, such as t-butyl peroxyneodecanoate, other than the above component (A), in a polymerization vessel having at its inner wall surface, a polymer scale deposition preventative coating, which is formed by applying an alkaline coating liquid, of (a) at least one condensation product of a quinone compound and a condensate of a quinone compound with an amino group containing diphenyl compound, and (b) at least one of the substances, a water-soluble polymer compound, an inorganic colloid or an alkali metal silicate, followed by drying the above coating. According to this process, a vinyl chloride polymer can be produced having excellent properties, such as initial coloration, in a short polymerization time, while suppressing deposition of polymer scale in the polymerization vessel.

REFERENCES:
patent: 5424377 (1995-06-01), Shimizu et al.
patent: 5442002 (1995-08-01), Shimizu et al.

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