Erodible agent releasing device comprising poly(orthoesters) and

Details Erodible agent releasing device comprising poly(orthoesters) and Erodible agent releasing device comprising poly(orthoesters) and

1977-08-24

1979-02-06

Sebastian, Leland A.

Compositions

Miscellaneous

71 64F, 71 64G, 128260, 252384, 252522, 424 19, 424 20, C09K 300

Patent

active

041383443

ABSTRACT:
The invention concerns orthoester and orthocarbonate polymers having a repeating mer comprising a hydrocarbon radical and a symmetrical dioxycarbon unit of the general formula: ##STR1## WHEREIN R.sub.1 is a multivalent hydrocarbon radical, R.sub.2 and R.sub.3 are hydrocarbon radicals with at least one of R.sub.2 or R.sub.3 bonded to the dioxycarbon through an oxygen linkage, and which polymers are synthesized by reacting a polyol with an orthoester or orthocarbonate. The polymers are useful for making articles of manufacture, including devices and coatings for delivering beneficial agents.

REFERENCES:
patent: 3252786 (1976-05-01), Bozzelli et al.
patent: 3887699 (1975-06-01), Yolles
patent: 3960150 (1976-06-01), Hussain et al.
patent: 4001388 (1977-01-01), Shell
patent: 4014987 (1977-03-01), Heller et al.

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