The invention relates to the use of carboxylic, sulfonic, phosphatidic and/or phosphate ester acids incorporated as a catalyst in poly(orthoester)s and other acid labile polymers such that upon exposure to aqueous environments the acid catalyzes the erosion of the polymer matrix. The rate of release of a drug substance incorporated into or surrounded by the poly(orthoester) or other acid labile polymer can be controlled in that the drug is released as the polymer is eroded in response to the catalytic action of the acid incorporated therein.
本发明涉及使用
羧酸、
磺酸、
磷脂酸和/或
磷酸酯酸作为催化剂加入聚(
邻苯二甲酸酯)和其他酸性聚合物中,使其在暴露于
水性环境时催化聚合物基质的侵蚀。掺入聚(
邻苯二甲酸酯)或其他酸性聚合物中或被其包围的药物物质的释放速度可以得到控制,因为在掺入其中的酸的催化作用下,当聚合物被侵蚀时,药物就会释放出来。