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    • 9. 发明公开
    • Liquid carbodiimide-uretonimine-modified polyphenylene polyisocyanates and polyurethane foams made therefrom
    • 液体碳二亚胺脲酮亚胺改性由其制备聚苯聚异氰酸酯和聚氨酯泡沫。
    • EP0308710A1
    • 1989-03-29
    • EP88114416.6
    • 1988-09-03
    • BASF Corporation
    • Narayan, Thirumurti
    • C08G18/79C07C119/055C07D229/00C08G18/14C08G18/72
    • C08G18/797
    • A process for the preparation of liquid poly­methylene polyphenylene polyisocyanate blends containing carbodiimide-uretonimine isocyanate linkages, containing a high two-ring methylene bis(phenylisocyanate) content, and light colored polyurethane foams made therefrom. The process is comprised of reacting polymethylene polyphenylene polyisocyanate with a catalytically effective amount of a carbodiimide-uretonimine promoting compound at a temperature sufficient to promote the formation of carbodiimide-­uretonimine linkages and an isocyanate content of about 25 percent and the desired viscosity is reached, and then reacting that product to deactivate the carbodiimide-­uretonimine catalyst, and finally blending two ring methylene bis(phenylisocyanate) with the product to produce a mixture having a two ring isocyanate content of about 60 percent of the total ring content and a viscosity comparable to standard polymeric MDI. Urethane foams made from this material are lighter in color than those formed from standard polymeric MDI.
    • 一种用于液体基多亚苯基多异氰酸酯共混物含有碳二亚胺的异氰酸酯键的脲酮亚胺,含有高两环的亚甲基双(异氰酸苯酯)的含量,和由其制成浅色聚氨酯泡沫体的制备方法。 该过程是由起反应基多亚苯基多异氰酸酯以足够能促进碳二亚胺脲酮亚胺键的形成和与异氰酸酯的约25%,所需的粘度内容的温度的催化有效量的碳二亚胺脲酮亚胺促销廷化合物达到的,并 然后使没有产品去激活碳二亚胺脲酮亚胺催化剂,最后混合两个环 - 亚甲基双(苯基异氰酸酯)与该产物以产生具有的总环含量的约60%并且与标准粘度的两个环形的异氰酸酯含量的混合物 聚合MDI。 由这种材料制成聚氨酯泡沫是在颜色上比那些从标准聚合MDI FORMED更轻。