Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From aldehyde or derivative thereof as reactant
Patent
1989-06-14
1990-08-07
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From aldehyde or derivative thereof as reactant
528220, 528222, 528232, 528271, 528274, 528300, 528302, 528308, 5283086, 528403, 528406, 528392, 514866, 514950, 514964, 424 78, 424426, 523105, C08G 200
Patent
active
049469312
ABSTRACT:
Polymers are provided that are useful for making biodegradable sustained release agent dispensers and which contain at least one of the following mer units (I) and (II) ##STR1## wherein X is a quadrivalent organic grouping, A and B are hydrogen or lower alkyl, and R is hydrocarbyl or oxyhydrocarbyl of 1 to 14 carbon atoms and, if oxyhydrocarbyl, containing 1 to 4 oxy groups, and may be either aliphatic or aryl, unsubstituted or substituted with one or more lower alkyl, amino, nitro or halogen moieties. Methods of synthesizing the novel polymers are also provided, as biodegradable beneficial agent dispensers prepared using the novel polymers.
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Heller Jorge
Ng Steve Y. W.
Penhale Donald W. H.
Acquah Sam A.
Kight III John
Pharmaceutical Delivery Systems, Inc.
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