Sustained release polymers

Details Sustained release polymers Sustained release polymers

1972-08-11

1976-05-25

Wong, Jr, Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 318R, 424 81, 526 26, 526 49, 526219, 526227, 526318, C08F22006

Patent

active

039592375

ABSTRACT:
A copolymer derived from a monomeric mixture comprising from 20 to 60 parts of acrylic or methacrylic acid, from 20 to 70 parts of a lower alkyl acrylate or methacrylate, and from 5 to 20 parts of a plasticizing monomer is at least partially neutralized by multivalent cations.

REFERENCES:
patent: 3113867 (1963-12-01), Van Norman et al.
patent: 3317493 (1967-05-01), Selby
patent: 3431226 (1969-03-01), Warson et al.
patent: 3577517 (1971-05-01), Kubot et al.
patent: 3764587 (1973-10-01), Zunker
patent: 3779952 (1973-12-01), Leonard

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