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    • 18. 发明授权
    • Organic polyisocyanates
    • 有机多异氰酸酯
    • US4144267A
    • 1979-03-13
    • US527473
    • 1974-11-26
    • Dieter DieterichPeter Markusch
    • Dieter DieterichPeter Markusch
    • C08G18/00C07C67/00C07C241/00C07C265/14C07C301/00C07C303/06C07C303/08C07C303/32C07C309/28C07C309/45C07C309/72C08G18/08C08G18/77C07C143/24C08F18/24C08G63/12
    • C08G18/0828C08G18/775
    • Aromatic polyisocyanates containing sulphonic acid or sulphonate groups which are substantially free from crystalline product and a method for making them are provided wherein a mixture of aromatic polyisocyanates having an isocyanato content of from about 10% to about 42% by weight is sulphonated, the improvement which comprises mixing and reacting liquid aromatic polyisocyanates having a viscosity of from about 8 cP to about 49 cP at 25.degree. C. and containing at least 40% by weight of phosgenation products of an aniline-phosgenation condensate and at least about 20% by weight of 2,6-tolylene diisocyanate, 2,4'-diphenylmethane diisocyanate, 2,2'-diphenylmethane diisocyanate or a mixture thereof, based on the weight of said liquid aromatic polyisocyanates with a sulphonating agent in an amount equivalent to from about 0.1% to about 40% by weight sulphur trioxide, based on the weight of said liquid aromatic polyisocyanates.
    • 提供含有基本上不含结晶产物的磺酸或磺酸盐基团的芳族多异氰酸酯及其制备方法,其中将异氰酸酯基含量为约10重量%至约42重量%的芳族多异氰酸酯的混合物磺化, 包括在25℃下粘度为约8cP至约49cP的液体芳族聚异氰酸酯混合和反应,并含有至少40重量%的苯胺 - 光气化缩合物的光气化产物和至少约20重量% 2,6-二甲苯二异氰酸酯,2,4'-二苯基甲烷二异氰酸酯,2,2'-二苯基甲烷二异氰酸酯或其混合物,基于所述液体芳族聚异氰酸酯与磺化剂的重量,其量相当于约0.1% 约40重量%的三氧化硫,基于所述液体芳族聚异氰酸酯的重量。