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    • 45. 发明公开
    • Lightly crosslinked poly(N-alkylmethylsiloxanes) and methods of producing same
    • 轻度交联的聚(N-烷基甲基硅氧烷)及其制备方法
    • EP0754717A2
    • 1997-01-22
    • EP96111693.6
    • 1996-07-19
    • DOW CORNING CORPORATION
    • Biggs, Timothy NolenLegrow, Gary Edward
    • C08G77/38C08G77/50C08G77/12
    • C08G77/38C08G77/12C08G77/50
    • The crosslinking and simultaneous alkylation of poly(hydridomethylsiloxanes) to form crosslinked siloxanes having n-alkylmethyl groups is disclosed. Without changing the chain length of the poly(hydridomethylsiloxane) starting material, a family of lightly crosslinked siloxanes having n-alkylmethyl groups, with a range of viscosities, are produced using one or more alpha-olefins along with a small amount of an unconjugated alpha, omega-diene added as a crosslinker. Our poly(hydridomethylsiloxanes) are made from highly pure silanol-free hexamethyldisiloxane and highly pure mixtures of silanol-free tetramethylcyclotetrasiloxane (D H 4) and pentamethylcyclopentasiloxane D H 5 containing no more than 100 parts per million (ppm) water, with anhydrous trifluoromethane sulfonic acid (triflic acid, CF 3 SO 3 H), at room temperature, to provide linear poly(hydridomethylsiloxanes) having degrees of polymerization of up to 250.
    • 披露了聚(氢化甲基硅氧烷)交联和同时烷基化以形成具有正烷基甲基的交联硅氧烷。 在不改变聚(氢化甲基硅氧烷)起始材料的链长的情况下,使用一种或多种α-烯烃以及少量未结合的α-烯烃产生具有一定粘度范围的具有正烷基甲基的轻度交联硅氧烷族 ,ω-二烯作为交联剂加入。 我们的聚(氢化甲基硅氧烷)由高纯度不含硅烷醇的六甲基二硅氧烷和不含硅烷醇的四甲基环四硅氧烷(DH4)和含不超过百万分之100份(ppm)水的五甲基环五硅氧烷DH5的高纯度混合物与无水三氟甲磺酸(三氟甲磺酸 ,CF 3 SO 3 H),以提供聚合度最高达250的线性聚(氢化甲基硅氧烷)。
    • 50. 发明公开
    • Pristine phenylpropylalkylsiloxanes
    • 2 Phenylpropylsiloxanen。
    • EP0665256A2
    • 1995-08-02
    • EP95300529.5
    • 1995-01-27
    • DOW CORNING CORPORATION
    • Legrow, Gary EdwardSudbury-Holtschlag, Joan E.
    • C08G77/04C07F7/08
    • C07F7/0849C07F7/0874C07F7/089C07F7/21C08G77/04C08G77/045C08G77/06
    • This invention pertains to pristine phenylpropylalkylsiloxanes consisting of mixtures of linear and cyclic siloxanes containing the structure
      and a method for their preparation. The pristine phenylpropylalkylsiloxanes of the instant invention contain no detectable silicon hydride (-SiH), free organics (-C=C-) or free inorganics. Additionally, the pristine phenylpropylalkylsiloxanes of the instant invention are high refractive index organosilicone polymers.
    • 原始苯基丙基烷基硅氧烷,选自:(I)混合物。 的cpds。 的式(a)和(b); 和(II)混合物。 的cpds。 (c)和(d)的化合物是新的,其中原始苯基丙基烷基硅氧烷不含可检测的氢化硅(-SH),游离有机物(-C = C-)或游离的无机物,并且无臭无色。 Ph =苯基; R = 1-4C烷基; R1 = 1-6C烷基或2-苯基丙基; R2 = 1-14C烃或分。 1-10C烃; u = 3-6; v,x = 1-50; y = 1-99,条件是x + y = 2-100且w,z = 1-5,比w + z = 3-6。 还声称:(1)产品 的苯基丙基烷基硅氧烷,其包括(i)水解纯度为99.9%以上的纯苯基丙基烷基二氯硅烷, 没有可检测的无硅氢化物的有机物或游离的无机物,然后回收水解反应产物,和(ii)平衡该产物。 在多异性酸催化剂存在下与三有机甲硅烷基封端剂反应; 和(2)如此制备的原始苯基丙基烷基硅氧烷。