The invention relates to the use of an acid anhydride incorporated as a latentiated catalyst in poly(ortho ester) and other polymers such that upon exposure to aqueous environments the acid anhydride generates the corresponding acid which catalyzes the matrix erosion. The releasing rate of a loaded drug or other beneficial substance incorporated into or surrounded by the poly(ortho ester) or other polymers can be controlled in that the drug is released as the poty(ortho ester)s or other polymer is eroded by action of the acid anhydride incorporated therein.
本发明涉及使用酸酐作为聚(原生酯)和其他聚合物中的潜伏催化剂,使酸酐在暴露于
水性环境时生成相应的酸,从而催化基质侵蚀。可以控制掺入聚(原生酯)或其他聚合物或被其包围的药物或其他有益物质的释放速度,因为药物是随着聚(原生酯)或其他聚合物在其中掺入的酸酐的作用下被侵蚀而释放出来的。