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    • 69. 发明授权
    • Elastomer-forming compositions
    • 弹性体形成组合物
    • US5905131A
    • 1999-05-18
    • US722332
    • 1996-09-27
    • Edouard JosephKlaus Kunz
    • Edouard JosephKlaus Kunz
    • C08L83/10C08G77/42C08G77/44C08L83/04C08G77/08
    • C08L83/04C08G77/12C08G77/16C08G77/18C08G77/70
    • Siloxane-based elastomer-forming compositions comprise a first a,w-dihydroxyl polydiorganosiloxane, a second a,w-dihydroxyl polydiorganosiloxane, a third a,w-dihydroxyl polydiorganosiloxane, an organosilicon compound having at least three silicon-bonded substituents selected from the group consisting of hydrogen and alkoxy groups, and a condensation catalyst. The number average molecular weight ratio of the first a,w-dihydroxyl polydiorganosiloxane to the second a,w-dihydroxyl polydiorganosiloxane is in the range of 20 to 80 and the number average molecular weight ratio of second a,w-dihydroxyl polydiorganosiloxane to the third a,w-dihydroxyl polydiorganosiloxane is in the range of 1 to 6. The molar ratio of the first a,w-dihydroxyl polydiorganosiloxane to the second a,w-dihydroxyl polydiorganosiloxane is in the range of 0.01 to 0.15 and the molar ratio of the second a,w-dihydroxyl polydiorganosiloxane to the third a,w-dihydroxyl polydiorganosiloxane is in the range of 0.2 to 2. These compositions are substantially solvent-free and result in elasomers having improved strength without fillers.
    • 基于硅氧烷的弹性体形成组合物包含第一a,w-二羟基聚二有机硅氧烷,第二a,w-二羟基聚二有机硅氧烷,第三a,二羟基聚二有机硅氧烷,具有至少三个与硅键合的取代基的有机硅化合物, 由氢和烷氧基组成,和缩合催化剂。 第一a,w-二羟基聚二有机硅氧烷与第二a,w-二羟基聚二有机硅氧烷的数均分子量比在20至80的范围内,并且第二a,w-二羟基聚二有机硅氧烷与第三 a,w-二羟基聚二有机硅氧烷的摩尔比在1至6的范围内。第一a,w-二羟基聚二有机硅氧烷与第二a,w-二羟基聚二有机硅氧烷的摩尔比在0.01至0.15的范围内, 第二个a-二羟基聚二有机硅氧烷与第三个a-二羟基聚二有机硅氧烷在0.2-2的范围内。这些组合物基本上是无溶剂的,并且导致具有改进强度的弹性体,而没有填料。