会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Method for preparing organopolysiloxane bases and compositions therefrom
    • 制备有机聚硅氧烷碱及其组合物的方法
    • US5777002A
    • 1998-07-07
    • US748435
    • 1996-11-13
    • Lori Jean ConwayThomas Edward GrayPhillip Joseph GriffithWilliam James Schulz, Jr.
    • Lori Jean ConwayThomas Edward GrayPhillip Joseph GriffithWilliam James Schulz, Jr.
    • C08K9/06C08L83/04
    • C08K9/06C08L83/04C08G77/045C08G77/16C08G77/20
    • 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.
    • 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。
    • 5. 发明授权
    • Method for preparing hydrophobic fumed silica
    • 制备疏水性热解法二氧化硅的方法
    • US5919298A
    • 1999-07-06
    • US5852
    • 1998-01-12
    • Phillip Joseph GriffithWilliam HerronBrian Robert HarknessRosemary Margaret TaylorDavid James Wilson
    • Phillip Joseph GriffithWilliam HerronBrian Robert HarknessRosemary Margaret TaylorDavid James Wilson
    • C01B33/18C08K3/36C08K9/06C09C1/30C04B14/04
    • C09C1/3081C08K3/36C08K9/06C01P2006/12C01P2006/90
    • 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.
    • 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。
    • 6. 发明授权
    • Organohydrogensiloxane resin crosslinker curable organosiloxane
composition with improved hysteresis characteristics
    • 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
    • US5861448A
    • 1999-01-19
    • US792238
    • 1997-01-31
    • Phillip Joseph GriffithChu Yat HoDiane Marie Kosal
    • Phillip Joseph GriffithChu Yat HoDiane Marie Kosal
    • C08K13/02C08G77/20C08K9/06C08L83/04C08L83/07
    • C08K9/06C08L83/04C08G77/12C08G77/16C08G77/20C08G77/70
    • 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.
    • 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。