Biodegradable free-radical addition polymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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526318, C08F 3402

Patent

active

051910489

ABSTRACT:
This invention is directed to a terpolymer containing as polymerized units at least one first monomer selected from the group of vinyl acetate, vinyl ethers and vinyl carbonates, at least one second monomer of an ethylenically unsaturated monocarboxylic acid, and at least one third monomer of an anhydride of a dicarboxylic acid. The terpolymer is formed by a free-radical polymerization in a nonaqueous solvent. It has further been discovered that the partial hydrolysis, saponification, and saponification followed by oxidation of this terpolymer leads to terpolymer derivatives with improved detergent properties and improved biodegradability.

REFERENCES:
patent: 3268491 (1966-08-01), Hattori et al.
patent: 3755264 (1973-08-01), Testa
patent: 3887480 (1975-06-01), Rue et al.
patent: 4009110 (1977-02-01), Topfl et al.
patent: 4659793 (1987-04-01), Yang
patent: 5008355 (1991-04-01), Tazi
"Copolymers of Acrylic with Vinyl Alcohol, Methyl Vinyl Ether and 2-Hydroxy-Acrylic Acid", Yukagaku, 34(6), 456 (1985).

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