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    • 2. 发明授权
    • Phenol extended polyurethanes prepared by RIM process
    • 苯酚延长了通过RIM工艺制备的聚氨酯
    • US4314962A
    • 1982-02-09
    • US220749
    • 1980-12-29
    • John C. WollensakKryn G. Ihrman
    • John C. WollensakKryn G. Ihrman
    • B29C67/24C08G18/10C08G18/32C08G18/66B29F1/00
    • C08G18/6674B29C67/246C08G18/10C08G18/3215C08G2120/00
    • Polyurethanes can be produced using dihydroxyaromatic compounds as chain extenders. Preferred polyurethanes of this type are RIM (reaction injection molding) molded products or cast elastomers. The dihydroxyaromatic compounds are preferably selected from:I. dihydroxybenzenes and alkyl-substituted dihydroxybenzenes wherein the alkyl groups have up to about 6 carbon atoms and the total number of carbon atoms in the alkyl groups in said alkyl-substituted dihydroxybenzene is up to about 12 carbon atoms, andII. alkylene bridged, alkyl-substituted bisphenols wherein the alkylene bridge contains up to about 6 carbon atoms and the total number of carbon atoms in the alkyl groups attached to each benzenoid nucleus is at least one but does not exceed about 12;said dihydroxyaromatic compounds being further characterized by having no more than one tert-alkyl group on a position adjacent to any hydroxy group.
    • 可以使用二羟基芳族化合物作为扩链剂来生产聚氨酯。 这种类型的优选聚氨酯是RIM(反应注射成型)模制产品或铸塑弹性体。 二羟基芳族化合物优选选自:I.二羟基苯和烷基取代的二羟基苯,其中烷基具有高达约6个碳原子,并且所述烷基取代的二羟基苯中的烷基中的碳原子总数高达约12碳 原子和二。 亚烷基桥接的烷基取代的双酚,其中亚烷基桥含有至多约6个碳原子,并且连接到每个苯环的烷基中的总碳原子数为至少一个但不超过约12个; 所述二羟基芳族化合物的进一步特征在于在与任何羟基相邻的位置上不超过一个叔烷基。
    • 10. 发明授权
    • Selective alkylation process
    • 选择性烷基化方法
    • US5057625A
    • 1991-10-15
    • US481173
    • 1990-02-20
    • Kryn G. Ihrman
    • Kryn G. Ihrman
    • C07C209/68
    • C07C209/68
    • Mono-ar-tert-butyl toluenediamine is selectively made by heating a mixture of toluenediamine and an aluminum halide of the formula R.sub.n AlX.sub.3-n or R.sub.3 Al.sub.2 X.sub.3 wherein n is 0, 1 or 2 and R is an alkyl containing 1-10 carbon atoms to 150.degree.-225.degree. C. and reacting the mixture with isobutylene at 500-300 psig until the yield of mono-ar-tert-butyl toluene is at or near maximum. Minor amounts of di-tert-butyl toluenediamines which form and are difficult to separate can then be lowered by venting the reaction and continuing to heat at about 130.degree.-200.degree. C. until the di-tert-butyl components are decreased to the desired level forming additional mono-ar-tert-butyl toluenediamine.
    • 通过加热甲苯二胺和式RnAlX3-n或R3Al2X3的卤化铝的混合物选择性地制备单 - 叔丁基甲苯二胺,其中n为0,1或2,R为含有1-10个碳原子的烷基至150 -22℃,并使混合物与异丁烯在500-300psig下反应,直到单叔丁基甲苯的产率达到或接近最大值。 形成并难以分离的少量二叔丁基甲苯二胺然后可以通过排出反应并在约130℃-200℃继续加热直到二叔丁基成分降至所需的 形成额外的单 - 叔丁基甲苯二胺。