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公开(公告)号：US4752626A
公开(公告)日：1988-06-21
申请号：US90008
申请日：1987-08-27
CPC分类号： B29C73/02 , C08G18/28 , C08G18/4063 , C08G18/698 , C08G18/70 , B29K2075/00 , B29K2105/045 , C08G2101/0008 , C08G2101/005 , C08G2101/0058
摘要： This invention generally relates to a high resilience urethane foam (HR foam) having low compression set at a wide range of isocyanate index for use in small void filling in integrated foam parts.The small voids formed in the molding process of integrated foam parts can be filled without penetration of foaming liquids into existing foam cells. In addition, resulting foams have very low compression set values at a wide range of isocyanate index.The foaming system of the present invention is composed of two components, i.e., thixotropic polyisocyanate component and thixotropic polyol component. Their thixotropicity is obtained by adding benzal sorbitol into respective components. The polyisocyanate is selected from organic polyisocyanates and the polyol component is prepared by mixing a polyol blend composed of a polyolefinic polyol and a polyoxyalkylene polyol in a weight ratio between 95/5 to 50/50, a blowing agent, a surfactant and a catalyst.
摘要翻译： 本发明一般涉及在广泛的异氰酸酯指数范围内具有低压缩永久变形的高回弹性聚氨酯泡沫（HR泡沫），用于集成泡沫部件的小空隙填充。 在一体化泡沫部件的成型过程中形成的小空隙可以填充而不会将泡沫液渗透到现有的泡沫单元中。 此外，所得泡沫在异氰酸酯指数的宽范围内具有非常低的压缩永久变形值。 本发明的发泡体系由触变性多异氰酸酯成分和触变性多元醇成分两部分组成。 通过将苯甲酸山梨糖醇加入到相应的组分中来获得它们的触变性。 多异氰酸酯选自有机多异氰酸酯，多元醇组分通过以95/5至50/50的重量比混合由聚烯烃多元醇和聚氧化烯多元醇组成的多元醇共混物，发泡剂，表面活性剂和催化剂来制备。
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2.发明授权Polyisocyanate compositions and low density flexible polyurethane foams produced therewith 失效多异氰酸酯组合物和由此生产的低密度柔性聚氨酯泡沫
公开(公告)号：US5621016A
公开(公告)日：1997-04-15
申请号：US214876
申请日：1994-03-16
CPC分类号： C08G18/7664 , C08G18/10 , C08G18/4837 , C08G2101/0008 , C08G2101/005 , C08G2101/0058 , C08G2101/0075 , C08G2101/0083
摘要： Polyisocyanate compositions are provided which comprise the reaction product of a diphenylmethane diisocyanate composition comprising 25 to 70% by weight of 2,4'-diphenylmethane diisocyanate and an isocyanate-reactive polyoxyethylene polyoxypropylene polyahl having an ethylene oxide content of at least 30% by weight, a number average hydroxyl equivalent weight of 700-2000 and an average nominal hydroxyl functionality of 2-6, the reaction product having a free NCO content of 2-31% by weight.
摘要翻译： 提供了多异氰酸酯组合物，其包含二苯甲烷二异氰酸酯组合物的反应产物，所述二苯基甲烷二异氰酸酯组合物包含25至70重量％的2,4'-二苯基甲烷二异氰酸酯和具有至少30重量％的环氧乙烷含量的异氰酸酯反应性聚氧乙烯聚氧丙烯多元醇， 数均羟基当量为700-2000，平均标称羟基官能度为2-6，反应产物的游离NCO含量为2-31重量％。
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公开(公告)号：US4088582A
公开(公告)日：1978-05-09
申请号：US649880
申请日：1976-01-16
CPC分类号： B01L3/50215 , G01N33/491
摘要： A blood collection device includes a tube for receiving a sample of whole blood for centrifugal separation into the lighter phase, plasma or serum, and the heavier cellular phase. The tube has a needle-pierceable stopper at the opposite end for maintaining a negative pressure in the tube. A blood phase partitioning device is disposed within the tube and includes upper and lower members with the upper member having a greater specific gravity greater than that of the lower member but together having a specific gravity between that of the lighter phase and that of the heavier phase. A sealant is disposed between the members and in contact with each member and has a specific gravity equal to the average of the two members. During centrifugation of the blood, the partitioning device automatically moves to the interface of the two phases, and the members move toward each other forcing the sealant radially outwardly from between the members and against the inner wall of the tube to provide a permanent partition between the two separated phases.
摘要翻译： 采血装置包括用于接收全血样品以便离心分离成更轻相，血浆或血清和较重细胞相的管。 该管在相对端具有可刺穿的塞子，用于维持管中的负压。 血液分配装置设置在管内并且包括上部构件和下部构件，其中上部构件的比重大于下部构件的比重，但是在比较重的相位和较重的相位之间具有比重 。 密封剂设置在构件之间并且与每个构件接触并且具有等于两个构件的平均值的比重。 在血液离心期间，分隔装置自动地移动到两相界面，并且构件相互朝向彼此移动，迫使密封剂从构件之间径向向外并且抵靠管的内壁，以提供永久分隔 两个分开的阶段。
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公开(公告)号：US4180465A
公开(公告)日：1979-12-25
申请号：US642514
申请日：1975-12-19
申请人： Vabilisetti S. Murty
发明人： Vabilisetti S. Murty
CPC分类号： G01N33/491
摘要： A fluid collection device includes a blood collection tube having a negative pressure therein and sealed at one end by a stopper pierceable by a needle cannula for drawing a blood specimen into the tube for centrifugal separation into a relatively light phase, plasma or serum, and a relatively heavy phase including the blood cells. A quantity of a gel-like mixture of liquid hydrocarbon-polymer, such as polybutene, and an inorganic powder, such as silica powder, is disposed in the tube. The gel-like mixture has a specific gravity intermediate those of the relatively light and heavy phases of the blood so that during centrifugation, the gel-like mixture moves to a position between the phases to provide a partition barrier between them.
摘要翻译： 流体收集装置包括在其中具有负压的采血管，其一端由可由针插管穿刺的塞子密封，用于将血液样本抽吸到管中用于离心分离成相对较轻的相，血浆或血清，以及 比较重的相包括血细胞。 液体烃聚合物如聚丁烯和无机粉末如二氧化硅粉末的凝胶状混合物的量设置在管中。 凝胶状混合物的比重是血液相对较轻和重相的比重，使得在离心过程中，凝胶状混合物移动到相之间的位置，从而在它们之间提供分隔壁。
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公开(公告)号：US5877227A
公开(公告)日：1999-03-02
申请号：US909110
申请日：1997-08-11
申请人： Vabilisetti S. Murty
发明人： Vabilisetti S. Murty
CPC分类号： C08G18/409 , C08G18/10 , C08G2101/0008 , C08G2101/005 , C08G2101/0083
摘要： The present invention is directed to a low density flexible polyurethane foam and the process of making the same from a polyisocyanate composition and an isocyanate reactive composition wherein the polyisocyanate composition comprises a semi-prepolymer which is the reaction product of an excess of a base isocyanate formulation with a polyoxyethylene polyol, said base isocyanate formulation comprising a mixture of diphenylmethane diisocyanate and polyphenylpolymethylene polyisocyanate, said diphenylmethane diisocyanate comprising, inter alia, 2, 4'-MDI in prescribed amounts, whereby the functionality of the base isocyanate formulation ranges from 2.07 to 2.12 and said isocyanate reactive composition comprises water, a second polyoxyethylene polyol, a cross-linker and catalyst.
摘要翻译： 本发明涉及一种低密度柔性聚氨酯泡沫及其由多异氰酸酯组合物和异氰酸酯反应性组合物制备的方法，其中多异氰酸酯组合物包含半过量预聚物，其是过量的异氰酸酯基配方的反应产物 与聚氧乙烯多元醇，所述碱性异氰酸酯配制剂包含二苯基甲烷二异氰酸酯和聚苯基聚亚甲基多异氰酸酯的混合物，所述二苯基甲烷二异氰酸酯尤其包含规定量的2,4'-MDI，由此基础异氰酸酯配方的官能度范围为2.07-2.12 并且所述异氰酸酯反应性组合物包含水，第二聚氧乙烯多元醇，交联剂和催化剂。
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