Poly-dicaboxylic acid anhydrides and polymeric anhydrides theref

Details Poly-dicaboxylic acid anhydrides and polymeric anhydrides theref Poly-dicaboxylic acid anhydrides and polymeric anhydrides theref

1986-09-29

1988-12-20

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528207, 528209, 528271, C08G 6704

Patent

active

047925981

ABSTRACT:
New poly-dicarboxylic acid anhydrides, which are suitable as bio-degradable matrix materials for the controlled release of medicinal agents in humans. The anhydrides have the following formula: ##STR1## where ##STR2## where n=an integer of two or more, for the first three radicals, or one or more for the fourth.

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