초록

Biodegradable polymers that are useful for making biodegradable sustained release agent dispensers and which contain acetal, carboxy-acetal, ortho ester and/or carboxy-ortho ester linkages.

대표청구항 ▼

A linear or crosslinked biodegradable polymer containing a combination of the following mer units: [Figure] [Figure] [Figure] and [Figure] wherein X is a quadrivalent organic grouping, A and B may be the same or different and are selected from the group consisting of hydrogen, and lower alkyl, and R

A linear or crosslinked biodegradable polymer containing a combination of the following mer units: [Figure] [Figure] [Figure] and [Figure] wherein X is a quadrivalent organic grouping, A and B may be the same or different and are selected from the group consisting of hydrogen, and lower alkyl, and R1, R2, R′, R″and R′″may be the same or different and are selected from the group consisting of hydrocarbyl of 1 to 14 carbon atoms, oxyhydrocarbyl of 1 to 14 carbon atoms containing 1 to 4 oxy groups, and aryl of 1 to 4 rings, and wherein said R1, R2, R′, R″and R′″are unsubstitent or substituted with one or more longer alkyl, amino, nitro or halogen moieties.