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    • 3. 发明授权
    • Polyurea dispersions in organic isocyanates
    • 聚脲分散在有机异氰酸酯中
    • US4786704A
    • 1988-11-22
    • US832344
    • 1986-02-24
    • Jeffrey HughesJohn Hynds
    • Jeffrey HughesJohn Hynds
    • C08G18/00C08G18/32C08G18/70C08G18/72C08G18/80C08L75/04
    • C08G18/8038C08G18/3234C08G18/708C08L75/04
    • A dispersion of a polyurea in an aromatic polyisocyanate is prepared by mixing the polyisocyanate with one or more aliphatic diprimary diamines having (a) at least one amine group attached to a carbon atom having not more than one hydrogen atom attached thereto or (b) at least one amine group attached to a carbon atom which is itself attached to a carbon atom having not more than one hydrogen atom attached thereto, provided that both amine groups are not attached directly to separate rings of an alkylene-linked polycyclic aliphatic ring system. The reaction preferably takes place at a temperature in the range 20.degree. C. to 60.degree. C. The polyurea dispersion products are useful for manufacture of polyurethane foams and elastomers of superior physical properties.
    • 聚脲在芳族多异氰酸酯中的分散体是通过将多异氰酸酯与一种或多种脂族二原子二胺混合来制备的,所述脂族二原子二胺具有(a)至少一个连接于不超过一个氢原子的碳原子上的胺基,或(b) 连接到碳原子上的至少一个胺基团,其本身连接到与其连接的氢原子不超过一个的原子的碳原子上,条件是两个胺基团不直接连接到亚烷基连接的多环脂族环系统的分开的环上。 反应优选在20℃至60℃的温度下进行。聚脲分散体产物可用于制造具有优异物理性能的聚氨酯泡沫和弹性体。
    • 9. 发明授权
    • Liquid polyisocyanate compositions
    • 液体多异氰酸酯组合物
    • US4386032A
    • 1983-05-31
    • US253261
    • 1981-04-13
    • Jeffrey HughesKevin E. Keane
    • Jeffrey HughesKevin E. Keane
    • C07C265/12C08G18/28C08G18/80C07C119/048
    • C07C265/12C08G18/283C08G18/8064
    • A method for the preparation of a liquid diphenylmethane diisocyanate composition which comprises reacting one molar proportion of substantially pure 4,4'-diphenylmethane diisocyanate, as hereinbefore defined, with from 0.01 to 0.8 molar proportions of a monoalkoxy polyalkylene glycol of the formula: ##STR1## wherein R represents an alkyl group containing from 1 to 12 carbon atoms, R.sup.1 represents hydrogen or an alkyl group containing from 1 to 3 carbon atoms and n is an integer of from 2 to 58, the reaction being performed at a temperature of from 100.degree. to 250.degree. C. and in the presence of a catalyst for the NCO/OH reaction.The liquid diisocyanate compositions are useful in the manufacture of polyurethanes, especially elastomers and flexible foams.
    • 一种制备液体二苯基甲烷二异氰酸酯组合物的方法,其包括使一摩尔比例的如上文所定义的基本上纯的4,4'-二苯基甲烷二异氰酸酯与0.01至0.8摩尔比例的下式的单烷氧基聚亚烷基二醇反应:其中R表示含有1至12个碳原子的烷基,R 1表示氢或含有1至3个碳原子的烷基,n为2至58的整数,该反应在100℃ DEG至250℃,并在NCO / OH反应催化剂存在下进行。 液体二异氰酸酯组合物可用于制备聚氨酯,特别是弹性体和柔性泡沫体。