本報告以NCO為末端基之PU預聚合物分 散於水相的同時進行架橋反應,具有胺基的化 合物如部分甲醇化之三聚氰胺,三乙烯四胺,尿 素及乙烯二胺均可進行架橋反應,另外以硬化行型的架橋劑TMPTA加入已被熱硬化的PU分散 液中,再進行紫外光架橋反應,發現機械性質, 物理性質及耐水性等均有明顯的改進。 A cross-linking reaction was introduced between PU prepolymer and amino curing agent while NCO-terminated PU prepolymers were dispersed into water phase. Triethylenetetraamine (TETA), ethylene diamine (EDA), partially methylolated melamine and urea among those amino group containing curing agents were used, and formaldehyde was applied for further cross-linking of those amino-cured PU dispersions via a thermal curing reaction; moreover, a photo-curing reaction was induced into one of those thermally cured PU dispersions and TMPTA was a cross-linker. The tensile strength, elongation, hardness as well as water resistance of the cured PU films had large improvements.
關聯:
第十二屆高分子研討會論文專輯第五卷=Proceedings of the 12th R.O.C. Polymer Symposium 1989，頁 242-245
