Method for producing graft-copolymers of vinyl chloride and poly

Details Method for producing graft-copolymers of vinyl chloride and poly Method for producing graft-copolymers of vinyl chloride and poly

1984-06-15

1986-03-04

Lieberman, Allan M.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525253, 525256, 525260, 525263, 525276, 525317, C08F25908

Patent

active

045741417

ABSTRACT:
This invention relates to a method for graft-copolymerizing vinyl chloride monomer to a polyfluorine resin to produce resins of improved physical properties and processability parameters. The vinyl chloride monomer and polyfluorine resin are first treated in a highly alkaline medium and at a high temperature, and the mixture is stirred. Suspension agent(s), water and an initiator are added to the mixture after the temperature thereof has been lowered. The resultant mixture which has been stirred and homogenized is heated to a temperature at which polymerization is completed. Thereafter the mixture is neutralized, washed, and dried. A product having improved impact strength and resistance to heat and abrasion results.

REFERENCES:
patent: 3956422 (1976-05-01), Takahashi et al.
patent: 4006201 (1977-02-01), Bauer et al.
patent: 4151128 (1979-04-01), Ackerman
patent: 4230832 (1980-10-01), Wei
patent: 4308359 (1981-12-01), Buning

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