Unsaturated poly(ester-amide) biomaterials

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

Reexamination Certificate

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C528S303000, C528S306000, C528S328000, C528S345000, C528S392000, C525S054100, C525S054200, C525S421000, C525S434000, C525S436000, C525S437000, C525S447000, C424S497000

Reexamination Certificate

active

07863406

ABSTRACT:
Biodegradable poly(ester-amides) are synthesized from amino acids, diols and dicarboxylic acids where one or both of the diols and dicarboxylic acids contain unsaturation; e.g., from di-p-nitrophenyl dicarboxylates and p-toluenesulfonic acid salts of bis(alpha-amino acid) disesters of diols where one or both of the dicarboxylate and diol moieties contain unsaturation or from di-p-nitrophenyl dicarboxylates, and p-toluene-sulfonic acid salts of bis(alpha-amino acid) diesters of diols and p-toluenesulfonic acid salt of lysine ester where one or both of the dicarboxylate and diol moieties contain unsaturation. The polymers are useful as biodegradable carriers for drugs of other bioactive agents.

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Katsarava, R., et al., “Amino Acid-Based Bioanalogous Polymers. Synthesis, and Study of Regular Poly(ester amide)s Based on Bis(α-amino acid) α,ω-Alkene Diesters, and Aliphatic Dicarboxylic Acids”, J. of Poly. Sci.: Part A: Poly. Chem., vol. 37, 391-407 (1999).

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