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公开(公告)号：US4207265A
公开(公告)日：1980-06-10
申请号：US563464
申请日：1975-03-31
申请人： Peter S. Carleton
发明人： Peter S. Carleton
CPC分类号： C07C37/52 , C07C37/08 , C07C37/20 , C07C37/50 , C07C2101/14 , C07C2101/16
摘要： A process is provided for the preparation of hydroquinone by oxidizing a phenol having in the paraposition a 1-cycloalkenyl or .alpha.-methylene-(alkyl or aralkyl) group. The oxidation is carried out using hydrogen peroxide or a hydrocarbyl peroxide in the presence of an inert solvent and a catalytic amount of a strong acid which is not oxidized by the peroxide. The other product of the reaction is the ketone derived by oxidation of the para-substituent in the starting phenol, e.g. p-isopropenylphenol gives hydroquinone and acetone. The reaction forms a particularly convenient route for conversion of phenol to hydroquinone in that phenol is condensed with acetone to bisphenol A, the latter is degraded by alkaline hydrolysis to a mixture of phenol and p-isopropenylphenol, which latter is subjected, without separation, to the above process to give a mixture of hydroquinone, phenol, and acetone. The acetone and phenol are recovered and used in the preparation of bisphenol A thereby starting a new cycle of conversion.
摘要翻译： 通过氧化具有1-环烯基或α-亚甲基 - （烷基或芳烷基）基团的苯酚的方法，提供了制备氢醌的方法。 在惰性溶剂和催化量的未被过氧化物氧化的强酸的存在下，使用过氧化氢或过氧化烃进行氧化。 反应的另一个产物是通过在起始苯酚中氧化对位取代基得到的酮，例如 对异丙烯基苯酚得到氢醌和丙酮。 该反应形成了将苯酚转化为氢醌的特别方便的途径，因为苯酚与丙酮缩合成双酚A，后者通过碱水解降解成苯酚和对异丙烯基苯酚的混合物，后者经分离而不分离 上述方法得到氢醌，苯酚和丙酮的混合物。 回收丙酮和苯酚并用于双酚A的制备，从而开始新的转化循环。
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公开(公告)号：US4126742A
公开(公告)日：1978-11-21
申请号：US905653
申请日：1978-05-15
CPC分类号： C08G18/4841 , C08G18/6674 , C08G2105/02 , C08G2120/00 , Y10S264/83 , Y10S528/905 , Y10S528/906 , Y10T428/31547
摘要： Novel solid polyisocyanurate polymers are disclosed which comprises the reaction product of an organic polyisocyanate, a trimerization catalyst and a polyol combination comprising from about 0.025 to about 0.15 equivalent and about 0.05 to about 0.25 equivalent, per equivalent of polyisocyanate, respectively of an ethylene oxide capped polypropyleneoxy glycol having an equivalent weight of from about 750 to about 1500 and either 1,4-butanediol or diethylene glycol.Although containing a higher proportion of polyurethane linkages than those polyisocyanurates containing the polypropyleneoxy glycol alone, the polymers of the invention are characterized by superior high temperature resistance and are particularly useful in the preparation of high modulus molded parts using reaction injection molding (RIM) techniques.
摘要翻译： 公开了新的固体聚异氰脲酸酯聚合物，其包含有机多异氰酸酯，三聚催化剂和多元醇组合的反应产物，其中每个多异氰酸酯分别包含约0.025至约0.15当量和约0.05至约0.25当量的环氧乙烷封端 当量为约750至约1500的聚丙烯氧基二醇和1,4-丁二醇或二甘醇。
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公开(公告)号：US4126741A
公开(公告)日：1978-11-21
申请号：US905654
申请日：1978-05-15
CPC分类号： C08G18/6674 , C08G2105/02 , C08G2120/00 , Y10S528/905 , Y10S528/906 , Y10T428/31547
摘要： Novel solid polyisocyanurate polymers are disclosed which comprise the reaction product of an organic polyisocyanate, a trimerization catalyst and a polyol combination comprising from about 0.025 to about 0.15 equivalent and about 0.05 to about 0.25 equivalent, per equivalent of polyisocyanate, respectively of a polypropyleneoxy triol having an equivalent weight of from about 750 to about 1500 and ethylene glycol.Although containing a higher proportion of polyurethane linkages than those polyisocyanurates containing the polypropyleneoxy triol alone, the polymers of the invention are characterized by superior high temperature resistance and are particularly useful in the preparation of high modulus molded parts using reaction injection molding (RIM) techniques.
摘要翻译： 公开了新的固体聚异氰脲酸酯聚合物，其包含有机多异氰酸酯，三聚催化剂和多元醇组合的反应产物，所述多元醇组合包含每当量多异氰酸酯约0.025至约0.15当量和约0.05至约0.25当量的聚异氰酸酯，所述聚异氰酸酯具有 约750至约1500的当量和乙二醇。
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公开(公告)号：US4055548A
公开(公告)日：1977-10-25
申请号：US724401
申请日：1976-09-17
IPC分类号： C08G18/00 , C08G18/09 , C08G18/48 , C08G18/72 , C08G18/76 , C08G18/80 , B29D27/00 , C08G18/14
CPC分类号： C08G18/4833 , C08G18/8019 , C08G2120/00 , Y10S264/83 , Y10S521/904 , Y10S528/906
摘要： A novel liquid isocyanate prepolymer composition is disclosed. The prepolymer is obtained by reacting a polymethylene polyphenylisocyanate containing from about 65 to about 85 percent by weight of methylenebis(phenylisocyanate) the remainder of said polymethylene polyphenylisocyanates having a functionality greater than 2, with from about 0.0185 to about 0.15 equivalent per equivalent of said polyphenylisocyanate of a polyoxyethyleneglycol having an average molecular weight of from about 200 to about 600. The liquid isocyanates so produced are characterized as storage stable liquids of relatively low viscosity which when used as the isocyanate component in polyurethane formulations, particularly molded polyurethanes, give rise to highly resilient and useful molded products.
摘要翻译： 公开了一种新的液体异氰酸酯预聚物组合物。 预聚物通过使含有约65-约85重量％亚甲基双（异氰酸苯酯）的多亚甲基多苯基异氰酸酯与官能度大于2的所述多亚甲基聚苯异氰酸酯的剩余部分与约0.0185至约0.15当量/当量的所述聚苯基异氰酸酯 的平均分子量为约200至约600的聚氧乙烯二醇。如此制备的液体异氰酸酯的特征在于具有相对低粘度的储存稳定液体，当用作聚氨酯配方，特别是模塑聚氨酯中的异氰酸酯组分时，产生高度的 弹性和有用的模制产品。
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公开(公告)号：US4810444A
公开(公告)日：1989-03-07
申请号：US59436
申请日：1987-06-08
IPC分类号： B29C45/00 , B29C33/00 , B29C39/42 , B29C43/10 , B29C43/36 , B29C45/14 , B29C45/34 , B29C45/56 , B29C67/24 , B29C70/48 , B29K75/00 , B29K105/06 , B29L9/00 , C08J5/04 , B29C43/04
CPC分类号： B29C33/0055 , B29C43/361 , B29C67/246 , B29C70/48 , B29C2043/3444 , B29C2043/3615 , B29C2043/5883 , B29C43/10 , B29K2075/00 , B29K2105/06
摘要： A process for the preparation of molded high strength composites comprising fibrous reinforcing material impregnated with a reaction injection molded polyisocyanurate resin. The process comprises first evacuating a mold containing the fibrous reinforcing material said mold equipped with means for accepting an overflow volume of the resin. The mold system is pressurized prior to gelation causing the overflow volume to be forced into a final volume. The molded composites have a high flexural moduli, good physical properties, low void content and smooth surface.
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