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    • 4. 发明授权
    • Compositions which can be crosslinked to form flame retardant and/or
tracking resistant and arc resistant organopolysiloxane elastomers
    • 可以交联以形成阻燃和/或耐追踪和抗电弧的有机聚硅氧烷弹性体的组合物
    • US5008317A
    • 1991-04-16
    • US407003
    • 1989-09-14
    • Dietrich WolferWilhelm Marsch
    • Dietrich WolferWilhelm Marsch
    • C08K3/22C08K5/544C08K5/56C08K13/02C08L83/04C08L83/07C08L83/08H01B3/30
    • C08K5/544C08K13/02C08K3/22
    • Compositions which can be crosslinked to form flame retardant and/or tracking resistant and arc resistant organopolysiloxane elastomers which comprises adding to a cross-linkable organopolysiloxane an additive which is obtained by mixing(A) 60 to 80 percent by weight of diorganopolysiloxane having 75 to 85 mol percent of dimethylsiloxane units and 15 to 25 mol percent of vinylmethylsiloxane units,(B) 20 to 35 percent by weight of a metal oxide selected from the group consisting of titanium dioxide, zirconium dioxide, zinc oxide, Ce(III) oxide and Ce(IV) oxide,(C) 0.05 to 0.25 percent by weight of platinum, calculated as the element,(D) 1 to 5 percent by weight of an organosilicon compound having basic nitrogen bonded via carbon to siliconin which the sum of the percentages (A) to (D) adds up to 100 percent by weight based on the total weight of the additive.In order to achieve tracking resistance and arc resistance, only titanium dioxide or zirconium dioxide are used, while any of the metal oxides can be used to achieve flame resistance.The additive is present in the composition in amounts of from 1 to 4 percent by weight, based on the total weight of the composition.
    • 可以交联以形成阻燃和/或耐追踪和抗电弧的有机聚硅氧烷弹性体的组合物,其包括向可交联的有机聚硅氧烷中加入通过将(A)60至80重量%的具有75至85的二有机聚硅氧烷 摩尔百分数的二甲基硅氧烷单元和15〜25摩尔%的乙烯基甲基硅氧烷单元,(B)20〜35重量%的选自二氧化钛,二氧化锆,氧化锌,Ce(III)氧化物和Ce (IV),(C)0.05〜0.25重量%的作为元素计算的铂,(D)1〜5重量%的具有通过碳与硅键合的碱性氮的有机硅化合物,其中百分比 (A)至(D)加入总重量的100重量%。 为了实现跟踪电阻和电弧电阻,仅使用二氧化钛或二氧化锆,而可以使用任何金属氧化物来实现阻燃性。 基于组合物的总重量,添加剂以组合物的1至4重量%的量存在于组合物中。