Process for producing vinyl alcohol polymer

Details Process for producing vinyl alcohol polymer Process for producing vinyl alcohol polymer

1996-07-19

1998-01-20

Reddick, Judy M.

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

Synthetic resins

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

525 57, 525 58, 525116, 525208, 525212, 525276, 525279, 525283, 525284, 525286, 525288, 525289, 525291, 5253265, 5253269, 5253273, 5253285, 5253304, 5253303, 5253306, 525342, 525343, 525348, 525349, 5253305, 525350, C08F 800

Patent

active

057102112

ABSTRACT:
According to the present invention, there are provided a process for producing a vinyl alcohol polymer comprising reaction of a vinyl ester polymer (A) having an epoxy group with a compound (B) having a thiol or thioester group and hydrolysis thereof, said hydrolysis being conducted during or after said reaction; and a process for producing a vinyl alcohol polymer comprising reaction of a vinyl ester polymer (C) having a thiol or thioester group with a compound (D) having an epoxy group and hydrolysis thereof, said hydrolysis being conducted during or after said reaction. According to the present invention, it is possible to efficiently introduce into PVA various functional groups having excellent reactivity, crosslinkability, ionic interactivity, water-solubility, interfacial physical properties, low-temperature flexibility, etc., under relatively mild reaction conditions. According to the present invention, in addition, it is possible to introduce into PVA such various functional groups, which could not be obtained by conventional methods.

REFERENCES:
patent: 2378536 (1945-06-01), Brubaker
patent: 2831830 (1958-04-01), Schroeder
patent: 2992210 (1961-07-01), Gluckman
patent: 3052657 (1962-09-01), Calhoun et al.
patent: 3166504 (1965-01-01), Krukziener et al.
patent: 3310540 (1967-03-01), Fang
patent: 3354130 (1967-11-01), Hornung et al.
patent: 4239865 (1980-12-01), Tarao et al.
patent: 5349008 (1994-09-01), Takada et al.

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