A liquid polymer which is rapidly curable, at room temperature, to a solid hydrolytically stable elastomer having high tensile and tear strengths, said liquid polymer having the formula:
wherein R is a liquid polymeric backbone selected from the group consisting of polyether and polythioether, said backbone having a number average molecular weight of at least 1,500 and having no carboxyl or hydroxyl groups; R¹ is lower alkyl, R² is lower alkyl, R³ is a divalent organic radical having no sulfur atoms, R⁴ is alkylene of from 3 to 6 carbon atoms, and which separates the oxygen atom from X by at least 3 carbon atoms, X is sulfur or -S-R⁵-S- wherein R⁵ is alkylene having from 2 to 12 carbon atoms, alkylene thioether of from 4 to 12 carbon atoms or hydrocarbon ether of from 4 to 20 carbon atoms, p is 2 to 4, m is 1 to 3, n is 0 to 2 and the sum of m and n is 3. There is also disclosed a method for curing such liquid polymers.
一种液态聚合物,可在室温下快速固化成具有高拉伸强度和撕裂强度的固态
水解稳定弹性体,所述液态聚合物具有以下式子:
其中 R 是选自聚醚和聚
硫醚的液态聚合物骨架,所述骨架的平均分子量至少为 1 500,且不含羧基或羟基;R¹ 是低级烷基,R² 是低级烷基,R³ 是不含
硫原子的二价有机基,R⁴ 是 3 至 6 个碳原子的亚烷基,它将氧原子与 X 隔开至少 3 个碳原子、X 是
硫或-S-R⁵-S-,其中 R⁵ 是具有 2 至 12 个碳原子的亚烷基、4 至 12 个碳原子的亚烷基
硫醚或 4 至 20 个碳原子的烃醚;p 是 2 至 4,m 是 1 至 3,n 是 0 至 2,m 和 n 之和是 3。本发明还公开了一种固化此类液态聚合物的方法。