Calcium salts of divinyl ether--maleic anhydride copolymer

Details Calcium salts of divinyl ether--maleic anhydride copolymer Calcium salts of divinyl ether--maleic anhydride copolymer

1979-02-22

1980-09-16

Levin, Stanford M.

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

Synthetic resins

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

260DIG47, 424 78, 526271, C08F22206

Patent

active

042231094

ABSTRACT:
The calcium salts of the solid cyclic copolymers of divinyl ether and maleic anhydride, soluble in water, have been found to be as effective in treating tumors and viruses as the prior art alkali metal salts (e.g., the sodium salt) but much less toxic. These copolymers are characterized by containing divinyl ether and maleic anhydride in a mole ratio of about 1:2, having a molecular weight of from about 2000 to about 100,000 and from about 5% to about 70% of its carboxylic acid groups converted to calcium salts.

REFERENCES:
patent: 3224943 (1965-12-01), Espy
patent: 3624218 (1971-11-01), Regelson
patent: 3794622 (1974-02-01), Breslow
patent: 3859433 (1975-01-01), Regelson

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