Process for the manufacture of vinyl chloride polymers modified

Details Process for the manufacture of vinyl chloride polymers modified Process for the manufacture of vinyl chloride polymers modified

1990-03-12

1991-03-26

Nielsen, Earl

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

Synthetic resins

From carboxylic acid or derivative thereof

525412, 525415, 528358, C08G 6308, C08G 8102

Patent

active

050030388

ABSTRACT:
In a first stage, a lactone is polymerized by an ionic route in vinyl chloride with the aid of a catalyst consisting of the product, optionally complexed with tetrahydrofuran, of the reaction of an alkylmetal with ethylenically unsaturated alcohol, optionally in the presence of water and, in a second stage, the said vinyl chloride is polymerized by a radical route in an aqueous suspension and in the presence of the polymerization medium originating from the first stage, to which other unsaturated monomers are optionally added.
The invention also relates to new modified vinyl chloride polymers consisting of lactone polymers whose number-average molecular weight is less than 5,000, grafted with vinyl chloride polymers.

REFERENCES:
patent: 4826934 (1989-05-01), Malfroid et al.
Chemical Abstracts 104, 51560f (1986).
Derwent Publications Ltd., J6 0090-208-A, Kanegafuchi Chem. KK.
Derwent Publications Ltd., J6 1062-547-A, Mitsubishi Monsanto KK.

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