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    • 22. 发明授权
    • Process for the production of dianhydrohexitol mixtures and the
production of polymers from such mixtures
    • 用于制备二羟基己糖醇混合物的方法和由这些混合物生产聚合物
    • US4564645A
    • 1986-01-14
    • US689357
    • 1985-01-07
    • Herbert SalzburgManfred HajekHolger Meyborg
    • Herbert SalzburgManfred HajekHolger Meyborg
    • C07D493/04C08G18/32C08G18/30
    • C07D493/04C08G18/3218
    • Liquid dianhydrohexitol mixtures are prepared from diacylation products of hexitols and compounds such as organic carboxylic acids, carboxylic acid anhydrides, carboxylic acid halides, ketene and carbonic acid ester derivatives. More specifically, such diacylation products are simultaneously dehydrated and isomerized by subjecting them to a temperature of at least 130.degree. C. in the presence of a strong acid to yield diacylated dianhydro-hexitol isomer mixtures. These isomer mixtures are then converted to dianhydro-hexitol isomer mixtures by hydrolysis or transesterification. Suitable strong acids include proton acids, Lewis acids and heterogeneous acid catalysts (e.g., ion exchange resins). The mixtures of the present invention are characterized by a minimal tendency towards crystallization. These mixtures are particularly useful as chain extending agents in the production of polyurethanes.
    • 液体二脱水己糖醇混合物由己醇的二酰化产物和有机羧酸,羧酸酐,羧酸卤化物,乙烯酮和碳酸酯衍生物等化合物制备。 更具体地说,这样的二酰化产物通过在强酸存在下使其至少130℃的温度同时进行脱水和异构化,得到二酰化二脱氢 - 己糖醇异构体混合物。 然后通过水解或酯交换将这些异构体混合物转化为二脱氢己糖醇异构体混合物。 合适的强酸包括质子酸,路易斯酸和多相酸催化剂(如离子交换树脂)。 本发明的混合物的特征在于最小的结晶倾向。 这些混合物特别可用作聚氨酯生产中的扩链剂。
    • 23. 发明授权
    • Process for the production of dianhydrohexitol mixtures and liquid
mixture of dianhydrohexitols
    • 二脱水己醇混合物的生产方法和二脱水己醇的液体混合物
    • US4506086A
    • 1985-03-19
    • US515411
    • 1983-07-20
    • Herbert SalzburgManfred HajekHolger Meyborg
    • Herbert SalzburgManfred HajekHolger Meyborg
    • C07D493/04C08G18/32
    • C07D493/04C08G18/3218
    • Liquid dianhydrohexitol mixtures are prepared from diacylation products of hexitols and compounds such as organic carboxylic acids, carboxylic acid anhydrides, carboxylic acid halides, ketene and carbonic acid ester derivatives. More specifically, such diacylation products are simultaneously dehydrated and isomerized by subjecting them to a temperature of at least 130.degree. C. in the presence of a strong acid to yield diacylated dianhydrohexitol isomer mixtures. These isomer mixtures are then converted to dianhydrohexitol isomer mixtures by hydrolysis or transesterification. Suitable strong acids include proton acids, Lewis acids and heterogeneous acid catalysts (e.g., ion exchange resins). The mixtures of the present invention are characterized by a minimal tendency towards crystallization. These mixtures are particularly useful as chain extending agents in the production of polyurethanes.
    • 液体二脱水己糖醇混合物由己醇的二酰化产物和有机羧酸,羧酸酐,羧酸卤化物,乙烯酮和碳酸酯衍生物等化合物制备。 更具体地说,这样的二酰化产物通过在强酸存在下经受至少130℃的温度同时进行脱水和异构化,得到二酰基二脱水己糖异构体混合物。 然后通过水解或酯交换将这些异构体混合物转化成二羟基己糖异构体混合物。 合适的强酸包括质子酸,路易斯酸和多相酸催化剂(如离子交换树脂)。 本发明的混合物的特征在于最小的结晶倾向。 这些混合物特别可用作聚氨酯生产中的扩链剂。
    • 26. 发明授权
    • Integral-skin polyurethane foams and process therefor
    • 整体皮肤聚氨酯泡沫及其工艺
    • US4305991A
    • 1981-12-15
    • US135817
    • 1980-03-31
    • Holger MeyborgWerner MormannHans-Walter IllgerManfred Bock
    • Holger MeyborgWerner MormannHans-Walter IllgerManfred Bock
    • C08G18/32C08G18/38C08G18/66C08G18/14B32B5/14C08G18/16C08G18/30
    • C08G18/3271C08G18/3831C08G18/6688Y10S264/14Y10T428/249989Y10T428/31554
    • The instant invention relates to a process for the production of polyurethane foams by reacting polyisocyanates with polyhydroxyl compounds of a specified molecular weight range in the presence of blowing agents and chain lengthening or cross-linking agents and optionally in the presence of catalysts, foam stabilizers and other additives generally known. The improvement resides in(a) the polyisocyanates used containing aliphatically and/or cycloaliphatically bound isocyanate groups;(b) the polyhydroxyl compounds used containing ether groups; and(c) the chain lengthening or cross-linking agents comprising at least in part a member selected from the group consisting of a monoalkoxylated hydrazine, a dialkoxylated hydrazine, a reaction product of a monoalkoxylated or dialkoxylated hydrazine with an aliphatic monoisocyanate in a molar ratio of 1:1. The reaction is carried out in the presence of additional chain lengthening agents having a specified molecular weight. The present invention also relates to polyurethane foams obtained by this process.
    • 本发明涉及通过使多异氰酸酯与特定分子量范围的多羟基化合物在发泡剂和链延长或交联剂的存在下以及任选地在催化剂,泡沫稳定剂和 其他通常已知的添加剂。 改进在于(a)含有脂族和/或环状结合的异氰酸酯基团的多异氰酸酯; (b)含有醚基的多羟基化合物; 链长度或交联剂至少包括选自单烷氧基化肼,二烷氧基化肼,单烷氧基化或二烷氧基化肼与脂族单异氰酸酯的反应产物的摩尔比 为1:1。 该反应在具有特定分子量的另外的链延长剂的存在下进行。 本发明还涉及通过该方法获得的聚氨酯泡沫。