Silicone compositions which, when exposed to atmospheric moisture at room temperature cure to form a flame retardant elastomer comprising (a) an organopolysiloxane having terminal hydroxyl groups, (b) a cross-linking agent having an average of at least three functional groups linked to a silicon atom per molecule, in which the functional groups are selected from the group consisting of hydrocarbonoxy groups, amine groups, aminoxy groups, oxime groups and mixtures thereof, (c) a condensation catalyst, (d) platinum metal or compound thereof, (e) carbon black, (f) alumina hydrate and optionally (g) a filler.
The resultant flame retardant silicon elastomers are useful as insulation for electrical equipment, as encapsulants and as sealants where flame retardancy is necessary.
有机
硅组合物,该组合物在室温下暴露于大气湿气时会固化形成阻燃弹性体,该组合物包括:(a) 具有末端羟基的有机聚
硅氧烷;(b)
交联剂,该
交联剂每个分子平均具有至少三个与
硅原子相连的官能团、(c) 缩合催化剂,(d)
铂金属或其化合物,(e)
炭黑,(f)
水合氧化铝,以及 (g) 填充剂。
由此产生的阻燃
硅弹性体可用作电气设备的绝缘材料、封装材料和需要阻燃的密封剂。