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1.发明授权Process for making powdered base for formulating curable liquid silicone rubber compositions 失效制备可固化液体硅橡胶组合物的粉底的方法
公开(公告)号：US6130272A
公开(公告)日：2000-10-10
申请号：US181978
申请日：1998-10-29
CPC分类号： C08K9/06
摘要： A process for making a flowable powdered base suitable for use in the formulation of liquid silicone rubber compositions that can be cured to form silicone elastomers. The process comprises (A) fluidizing a reinforcing silica filler in a high-shear mixer, (B) maintaining the content of the mixer at a temperature below about 60.degree. C. while adding to the mixer a silylating agent, a nitrogen containing compound to facilitate the silylation reaction, and water thereby forming an essentially homogeneous mixture comprising a treated reinforcing silica filler; (C) adding a polydiorganosiloxane having a viscosity of about 0.03 to 300 Pa.s at 25.degree. C. to the mixer and forming a flowable powdered base having an average particle size of from about 1 to 1000 microns, and (D) heating the flowable powdered base under conditions sufficient to remove volatiles.
摘要翻译： 制备可流动的粉末状碱的方法，其适用于可固化形成硅氧烷弹性体的液体硅橡胶组合物的配方。 该方法包括（A）在高剪切混合器中使增强二氧化硅填料流化，（B）将混合器的含量保持在低于约60℃的温度，同时向混合器中加入甲硅烷基化试剂，含氮化合物 促进甲硅烷基化反应和水，从而形成包含经处理的增强二氧化硅填料的基本均匀的混合物; （C）在25℃下向粘合剂中加入粘度为约0.03至300Pa.s的聚二有机硅氧烷，并形成平均粒度为约1-1000微米的可流动粉末状基质，和（D）加热 可流动的粉状基质在足以除去挥发物的条件下。
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2.发明授权Use of high molecular weight organopolysiloxanes to improve physical properties of liquid silicone rubber compositions 失效使用高分子量有机聚硅氧烷改善液态硅橡胶组合物的物理性能
公开(公告)号：US5859094A
公开(公告)日：1999-01-12
申请号：US707259
申请日：1996-09-03
摘要： A platinum group-metal curing liquid silicone rubber compositions having improved physical properties such as tear and heat-aging, especially at durometers below about 35 and above about 65. The present inventors have unexpectedly discovered that the addition of diorganohydrogensiloxy end-blocked polydiorganosiloxanes and triorganosiloxy end-blocked polydiorganosiloxanes having a viscosity greater than about 10 Pa.cndot.s at 25.degree. C. to liquid silicone rubber compositions can provide for the described improved properties.
摘要翻译： 具有改善的物理性能例如撕裂和热老化的铂族金属固化液体硅橡胶组合物，特别是在低于约35℃或更高于约65℃的硬度下。本发明人意外地发现，加入二有机氢甲硅烷基封端的聚二有机硅氧烷和三有机硅氧烷 在25℃下粘度大于约10Pa.s的封端聚二有机硅氧烷与液体硅橡胶组合物可提供所述改进的性能。
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3.发明授权
公开(公告)号：US5777002A
公开(公告)日：1998-07-07
申请号：US748435
申请日：1996-11-13
CPC分类号： C08K9/06 , C08L83/04 , C08G77/045 , C08G77/16 , C08G77/20
摘要： A method for preparing organopolysiloxane bases with high levels of fillers. The present inventors have found that by mixing the components of the base at a temperature below about 60.degree. C. for a period of time sufficient to effect essentially a homogeneous blend, a base composition is formed which can be further blended with a platinum group metal-containing catalyst, an organohydrogensiloxane, and optionally an inhibitor to form a curable liquid silicone rubber (LSR) composition. The curable LSR composition has improved flow characteristics and improved shelf life when compared to similar materials where the base is prepared at temperatures above about 60.degree. C. The improved flow characteristics allows larger quantities of fillers to be incorporated into the curable LSR composition while still maintaining acceptable flow characteristics. Silicone elastomers prepared using the curable LSR compositions can have improved swell and degradation resistance to oils, lower compression set values, and improved tear, elongation, and tensile values and require no post cure. The present organopolysiloxane bases are particularly useful as a common base for forming a group of cured silicone elastomers with a range of durometers.
摘要翻译： 一种制备高含量填料的有机聚硅氧烷基料的方法。 本发明人已经发现，通过将碱的组分在低于约60℃的温度下混合足以实现基本均匀共混物的时间，形成基础组合物，其可以进一步与铂族金属 的有机氢硅氧烷和任选的抑制剂以形成可固化液体硅橡胶（LSR）组合物。 与基材在高于约60℃的温度下制备的类似材料相比，可固化的LSR组合物具有改善的流动特性和改善的保质期。改进的流动特性允许更大量的填料掺入可固化LSR组合物中同时仍保持 可接受的流量特性。 使用可固化的LSR组合物制备的硅氧烷弹性体可以具有改善的对油的溶胀和降解抗性，较低的压缩永久变形值和改进的撕裂，伸长率和拉伸值，并且不需要后固化。 本发明的有机聚硅氧烷基料特别可用作形成具有一定范围的硬度的一组固化的硅氧烷弹性体的常用碱。
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公开(公告)号：US20110184112A1
公开(公告)日：2011-07-28
申请号：US12992408
申请日：2009-05-14
IPC分类号： C08K3/22
CPC分类号： C09C1/407 , C08G77/12 , C08G77/16 , C08G77/18 , C08G77/20 , C08G77/24 , C08G77/70 , C08K5/14 , C08K9/06 , C08L83/04 , C09C1/0081 , C09C1/402 , C09C3/08 , C09C3/12 , C08L2666/54 , C08L83/00
摘要： There is provided a silicone rubber composition comprising an organopolysiloxane having a viscosity of at least 250,000 mPa·s at 250C, treated filler, and an organic peroxide curing agent. The composition is substantially free of reinforcing silica fillers and is characterised in that the filler comprises a mixture of aluminium trihydroxide and kaolin in a ratio of from 1:3 to 4:1.
摘要翻译： 提供一种硅橡胶组合物，其包含在250℃下粘度为至少25万mPa·s的有机聚硅氧烷，处理过的填料和有机过氧化物固化剂。 所述组合物基本上不含增强二氧化硅填料，其特征在于填料包含比例为1:3至4:1的三氢氧化铝和高岭土的混合物。
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公开(公告)号：US5919298A
公开(公告)日：1999-07-06
申请号：US5852
申请日：1998-01-12
申请人： Phillip Joseph Griffith , William Herron , Brian Robert Harkness , Rosemary Margaret Taylor , David James Wilson
发明人： Phillip Joseph Griffith , William Herron , Brian Robert Harkness , Rosemary Margaret Taylor , David James Wilson
CPC分类号： C09C1/3081 , C08K3/36 , C08K9/06 , C01P2006/12 , C01P2006/90
摘要： A method for the preparation of hydrophobic fumed silicas which are useful, for example, as reinforcing fillers in rubber compositions. The method comprises two steps, where in the first step an aqueous suspension of fumed silica is contacted with an organosilicon compound in the presence of a catalytic amount of an acid to effect hydrophobing of the fumed silica. In the preferred method the first step is conducted in the presence of a water miscible organic solvent which facilitates hydrophobing of the fumed silica with the organosilicon compound and the fumed silica has a BET surface area greater than 50 m.sup.2 /g. In the second step the aqueous suspension of the fumed silica is contacted with a water-immiscible organic solvent at a solvent to silica weight ratio greater than 0.1:1 to effect separation of the hydrophobic fumed silica from the aqueous phase. In a preferred process the hydrophobic fumed silica has a surface area within a range of about 100 m.sup.2 /g to 750 m.sup.2 /g.
摘要翻译： 用于制备疏水性热解法二氧化硅的方法，其可用于例如橡胶组合物中的增强填料。 该方法包括两个步骤，其中在第一步骤中，在催化量的酸存在下，将热解法二氧化硅的水悬浮液与有机硅化合物接触以进行热解法二氧化硅的疏水。 在优选的方法中，第一步是在水混溶性有机溶剂的存在下进行，该有机溶剂有利于有机硅化合物的热解法二氧化硅的疏水化，并且煅制二氧化硅的BET表面积大于50m 2 / g。 在第二步中，将热解法二氧化硅的水悬浮液与水不混溶的有机溶剂以溶剂与二氧化硅重量比大于0.1:1的比例接触，以使疏水性热解二氧化硅与水相分离。 在优选的方法中，疏水性热解法二氧化硅具有在约100m 2 / g至750m 2 / g范围内的表面积。
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6.发明授权Organohydrogensiloxane resin crosslinker curable organosiloxane composition with improved hysteresis characteristics 失效有机氢硅氧烷树脂交联剂可固化的有机硅氧烷组合物具有改善的滞后特性
公开(公告)号：US5861448A
公开(公告)日：1999-01-19
申请号：US792238
申请日：1997-01-31
摘要： A platinum curing organosiloxane composition having improved hysteresis characteristics when cured. The composition requires the presence of a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 20 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C. and containing essentially no ethylenically unsaturated hydrocarbon radicals bonded to non-terminal silicon atoms and a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 0.1 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C., where from 1 to 5 percent of the non-terminal repeating units of the siloxane comprise a vinyl radical. In addition, the present composition comprises 10 to 30 weight percent of a reinforcing silica filler that has been treated with hexamethyldisilazane and 1,1,3,3-tetramethyl-1,3-divinyldisilazane, and an organohydrogensiloxane resin crosslinker comprising greater than 5 silicon-bonded hydrogen atoms per molecule.
摘要翻译： 固化时具有改善的滞后特性的铂固化有机硅氧烷组合物。 该组合物需要在25℃下具有约20Pax至200Pax的粘度范围的二有机乙烯基甲硅烷氧基封端的聚二有机硅氧烷，并且基本上不含与非末端硅原子键合的烯键式不饱和烃基和含有二有机基乙烯基硅氧烷封端的聚二有机硅氧烷， 在25℃下粘度范围为约0.1Pax至200Pax，其中硅氧烷的非末端重复单元的1至5％包含乙烯基。 此外，本发明的组合物包含10至30重量％的用六甲基二硅氮烷和1,1,3,3-四甲基-1,3-二乙烯基二硅氮烷处理的增强二氧化硅填料，以及包含大于5个硅的有机氢硅氧烷树脂交联剂 每分子键合氢原子。
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7.发明授权
公开(公告)号：US5679727A
公开(公告)日：1997-10-21
申请号：US623591
申请日：1996-03-28
摘要： A platinum curing organosiloxane composition having improved hysteresis characteristics when cured. The composition requires the presence of a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 20 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C. and containing essentially no ethylenically unsaturated hydrocarbon radicals bonded to non-terminal silicon atoms and a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 0.1 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C., where from 1 to 5 percent of the non-terminal repeating units of the siloxane comprise a vinyl radical. In addition, the present composition comprises 10 to 30 weight percent of a reinforcing silica filler that has been treated with hexamethyldisilazane and 1,1,3,3-tetramethyl-1,3-divinyldisilazane, and an organohydrogen siloxane crosslinker comprising at least ten silicon-bonded hydrogen atoms per molecule.
摘要翻译： 固化时具有改善的滞后特性的铂固化有机硅氧烷组合物。 该组合物需要在25℃下具有约20Pax至200Pax的粘度范围的二有机乙烯基甲硅烷氧基封端的聚二有机硅氧烷，并且基本上不含与非末端硅原子键合的烯键式不饱和烃基和含有二有机基乙烯基硅氧烷封端的聚二有机硅氧烷， 在25℃下粘度范围为约0.1Pax至200Pax，其中硅氧烷的非末端重复单元的1至5％包含乙烯基。 此外，本发明的组合物包含10至30重量％的已经用六甲基二硅氮烷和1,1,3,3-四甲基-1,3-二乙烯基二硅氮烷处理的增强二氧化硅填料，以及包含至少十个硅的有机氢硅氧烷交联剂 每分子键合氢原子。
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