Afterchlorinated vinyl chloride polymers

Details Afterchlorinated vinyl chloride polymers Afterchlorinated vinyl chloride polymers

1976-04-16

1977-08-02

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 17, C08F 822

Patent

active

040397327

ABSTRACT:
Vinyl chloride polymers are chlorinated in a dry, two-step process including treating particulate vinyl chloride with gaseous chlorine at temperatures in the range of -20.degree. C to +50.degree. C, preferably 20.degree.-25.degree. C and without the use of radical-forming initiators or radiation for at least about 30 minutes, then increasing the temperature of the reaction to at least 70.degree. C until thermal radical formation occurs. In the second step the temperature is maintained below the point where the vinyl chloride is apt to agglomerate or discoloration occurs.

REFERENCES:
patent: 3163631 (1964-12-01), Schwander et al.
patent: 3475401 (1969-12-01), Ben-Moshe et al.
patent: 3663392 (1972-05-01), Zeitler et al.
patent: 3813370 (1974-05-01), Gambaretto et al.

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