Process for producing vinyl ester polymer and process for produc

Details Process for producing vinyl ester polymer and process for produc Process for producing vinyl ester polymer and process for produc

1992-08-17

1994-07-19

Kight, III, John

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

Synthetic resins

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

525245, 525264, C08F 224, C08F 230

Patent

active

053310551

ABSTRACT:
There are disclosed a process for producing a vinyl ester polymer having a high degree of polymerization at a high efficiency, which process comprises subjecting a vinyl ester monomer to seed polymerization by the use of a vinyl ester polymer emulsion as a seed emulsion under the conditions in which the charge of a water-soluble initiator per unit volume (1 liter) of reactant liquid charge is 1.times.10.sup.-8 to 2.times.10.sup.-4 mol, and the charge of the water-soluble initiator per one particle of the vinyl ester polymer particles in the seed emulsion is 1.times.10.sup.-28 to 1.times.10.sup.-20 mol, and a process for producing a vinyl alcohol polymer at a high efficiency from the vinyl ester polymer thus obtained.
According to these processes of the present invention, both a vinyl ester polymer and vinyl alcohol polymer each having a higher degree of polymerization can be produced with ease on an industrial scale.

REFERENCES:
patent: 2587562 (1952-02-01), Wilson
patent: 4164489 (1979-09-01), Daniels et al.
patent: 4226752 (1980-10-01), Erickson et al.
"Contemporary Polymer Chemistry", Allcock, Prentice Hall, Englewood Cliffs, N.J., pp. 281-283 (1981).
Journal of the American Chemical Society, Shultz, pp. 3422-3430 (1954). (month unavailable).
Chemical Abstracts, vol. 89, No. 12, Sep. 1978, p. 26, Column 1, Abstract 89: 90636b, Columbus, Ohio, US.

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