Polymers containing 55 to 90% of units of the formula (A) :
wherein R1 is a hydrogen atom or an alkyl group of 1 to 3 carbon atoms; and 10 to 45% of units of the formula (B) and (C):
wherein R2 is a hydrogen group of 5 to 19 carbon atoms, for example n-C11H23, R3 is a hydrogen atom or an alkyl group of 1 to 3 carbon atoms, R4 is a hydrocarbon group of 5 to 19 carbon atoms, for example n-C11H23 and X- is an anion and which contain at least 10% of units of formula (C) and are free from polymeric species having a molecular weight of less than 10,000 are described. The polymers possess antimicrobial activity against common pathogens. Isotonic aqueous solutions containing 0.002 to 0.025% of the polymer are suitable for the sterilisation of contact lenses for example by immersion of the lens in the solution overnight. Hydrophilic ointments containing from 0.002 to 0.25% of the polymer are suitable for the treatment of bacterial infection of lesions of the skin such as burns and ulcers.
含有 55%至 90%的式(A):
其中 R1 是氢原子或 1 至 3 个碳原子的烷基;以及 10 至 45%的式 (B) 和 (C) 单元:
其中 R2 是 5 至 19 个碳原子的氢基,例如 n-
C11H23,R3 是氢原子或 1 至 3 个碳原子的烷基,R4 是 5 至 19 个碳原子的烃基,例如 n- ,X- 是阴离子,并且至少含有 10%的式 (C) 单元,且不含分子量小于 10,000 的聚合物。这些聚合物对常见病原体具有抗菌活性。含 0.002% 至 0.025% 聚合物的等渗
水溶液适用于隐形眼镜的消毒,例如将镜片浸泡在溶液中过夜。含 0.002-0.25% 聚合物的亲
水软膏适用于治疗烧伤和溃疡等皮肤病的细菌感染。