Conversion of polyvinyl alcohol to acrylic acid polymer

Details Conversion of polyvinyl alcohol to acrylic acid polymer Conversion of polyvinyl alcohol to acrylic acid polymer

1984-12-24

1986-07-22

Anderson, Harold D.

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

Synthetic resins

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

5263171, C08F 800

Patent

active

046020624

ABSTRACT:
It has been surprisingly discovered in accordance with the present invention that polyvinyl alcohol can be substantially selectively converted to an acrylic acid polymer or copolymer by first reacting the polyvinyl alcohol with a desired predetermined amount of formic acid to form an intermediate reaction product of the formic acid with the hydroxyl groups of the polyvinyl alcohol and by bringing the intermediate into contact with a bed of activated carbon in the presence of carbon monoxide and an alkyl halide promoted group VIII soluble transition metal catalyst, optionally in the presence of a solvent. When substantially all of the hydroxyl groups are reacted with formic acid to form a polyvinyl formate intermediate, the final product will be a polyacrylic acid. When the intermediate contains both hydroxyl groups and formate groups, the final product will be a poly (vinyl alcohol, acrylic acid) copolymer.

REFERENCES:
patent: 2649435 (1953-08-01), Stanin et al.
patent: 3365408 (1968-01-01), Ohara

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