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    • 5. 发明授权
    • Slow-curing water-curable urethane prepolymer composition
    • 缓慢固化的水可固化氨基甲酸酯预聚物组合物
    • US4322327A
    • 1982-03-30
    • US196831
    • 1980-10-14
    • Naoki YoshimuraKenji HijikataNoritaka Hosokawa
    • Naoki YoshimuraKenji HijikataNoritaka Hosokawa
    • C08G18/08C08G18/10C08G18/48C08L75/00
    • C08G18/4833C08G18/0819C08G18/10C08G2210/00Y10S524/916Y10S528/904
    • A novel slow-curing water-curable urethane prepolymer composition obtained by reacting (A) a hydrophilic urethane prepolymer which is a reaction product of a polyisocyanate and a hydrophilic polyol prepolymer and has at least two --NCO groups and (B) a blocking agent selected from a class consisting of heterocyclic compounds having an ##STR1## structure in the molecule thereof, hydroxypyridines and hydroxyquinolines in the proportion that the equivalent ratio of the .dbd.NH groups of the --OH groups in the blocking agent (B) to the --NCO groups in the hydrophilic urethane prepolymer (A), that is, --OH or .dbd.NH/--NCO ratio, is 0.05 to 2 is disclosed. This composition is remarkably useful as a grouting material, for forming hydrogel which is effective as a fixative or carrier of various materials, as a vehicle for coating materials, and as a stabilizer and thickener for aqueous resin emulsions.
    • 通过使(A)亲水性氨基甲酸酯预聚物(多异氰酸酯与亲水性多元醇预聚物的反应产物)与至少两个-NCO基团反应得到的新型慢硫化水可固化氨基甲酸酯预聚物组合物和(B)选择的封端剂 由分子中具有结构的杂环化合物组成的类别,羟基吡啶类和羟基喹啉类,其中封闭剂(B)中-OH基团的= NH基团与-NCO基团的当量比 在亲水性氨基甲酸酯预聚物(A)中,即-OH或= NH / -NCO比为0.05〜2。 该组合物作为灌浆材料非常有用,用于形成作为各种材料的固定剂或载体,作为涂料的载体,作为水性树脂乳液的稳定剂和增稠剂有效的水凝胶。