Method for producing vinyl chloride resins

Details Method for producing vinyl chloride resins Method for producing vinyl chloride resins

1978-02-23

1980-10-07

Henderson, C. A.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526208, 526319, 5263442, C08F 220, C08F 202, C08F11808, C08F11406

Patent

active

042269660

ABSTRACT:
A method for suspension polymerizing vinyl chloride monomer, or a mixture thereof with copolymerizable monomers, employs as a suspension stabilizer a partially saponified polyvinyl alcohol having a degree of saponification between about 60 and about 90 mol percent, and a solubility-in-methanol index at 55.degree. C. in a range of up to about 60 percent.

REFERENCES:
patent: 2356562 (1944-08-01), Berg
patent: 2535189 (1950-12-01), Benson
patent: 2812318 (1957-11-01), Kreager
patent: 3817959 (1974-06-01), Balwe
patent: 3842055 (1974-10-01), Gabriel
patent: 3929753 (1975-12-01), Itoh
Schildknecht, C. W., Vinyl and Related Polymers, Wiley & Sons (NY), pp. 330, 331, 343 (1952).

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