Process for producing ethylene-vinyl ester copolymers, ethylene-

Details Process for producing ethylene-vinyl ester copolymers, ethylene- Process for producing ethylene-vinyl ester copolymers, ethylene-

1993-05-27

1994-10-04

Reddick, Judy M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 71, 526222, 526319, C08F 200

Patent

active

053527500

ABSTRACT:
Process for producing ethylene-vinyl ester copolymers using a polymerization solvent of a dialkyl sulfoxide (process X); process for producing ethylene-vinyl alcohol copolymer by liquid phase saponification using a solvent of a dialkyl sulfoxide (process Y); and process for producing shaped articles which comprises contacting the ethylene-vinyl alcohol copolymer obtained by the process Y, or that obtained by saponifying the ethylene-vinyl ester copolymer obtained by process X, to a non-solvent for ethylene-vinyl alcohol copolymer.
Ethylene-vinyl ester copolymers having a wide range of ethylene content and higher degree of polymerization than that with solution polymerization using methanol.
The rate of saponification is higher than that with single solvent system of lower alcohol.
Production cost is low, because production process of polymer is directly connected to that of shaped articles utilizing the polymer.

REFERENCES:
patent: 2386347 (1945-10-01), Roland
patent: 3080350 (1963-03-01), Imai et al.
patent: 3344129 (1967-09-01), Bestian et al.
patent: 3780004 (1973-12-01), Hoyt et al.
patent: 4134837 (1979-01-01), Yamashita et al.
patent: 4269713 (1982-05-01), Yamashita
patent: 4636551 (1987-01-01), Okaya et al.
patent: 4707516 (1987-11-01), Janouch et al.
J. A. Vinson, "Hydrolysis of Latex Paint in Dimethyl Sulfoxide" J. Chem. Ed., vol. 46, No. 12, p. 877 (1969).
"Poval" (Revised Edition) published by Kobunshi Kankokai on Apr. 1, 1981.

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