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    • 5. 发明授权
    • Fluorosilicone copolymers and process for the preparation thereof
    • 氟硅酮共聚物及其制备方法
    • US3974120A
    • 1976-08-10
    • US574331
    • 1975-05-05
    • John S. RazzanoVerne G. Simpson
    • John S. RazzanoVerne G. Simpson
    • C08G77/00C08G77/04C08G77/06C08G77/08C08G77/22C08G77/24C08K5/15
    • C08G77/08C08G77/24
    • Diorganopolysiloxane copolymers having a viscosity from 100,000 to 200,000,000 centipoise at 25.degree.C., are produced by (a) forming an admixture of (i) a cyclic alkyl trifluoropropyl trisiloxane, (ii) a second cyclic diorgano trisiloxane, (i) being present in an amount of 40 to 85 mol % of the total of (i) and (ii), (iii) from 5 to 300 parts per million of an alkyl lithium catalyst, the alkyl component containing from 1 to 12 carbon atoms, and (iv) an aprotic solvent, said aprotic solvent being capable of dissolving both the trimers (i) and (ii) and the copolymer product, (b) reacting said admixture at a temperature between 0.degree.C. and 150.degree.C. to form the copolymer, and (c) recovering the copolymer from the reaction mixture.
    • 通过(a)形成(i)环状烷基三氟丙基三硅氧烷,(ii)第二环状二有机三硅氧烷,(i)存在于(ⅰ)中的第二环状二有机基三硅氧烷的混合物来制备在25℃下具有100,000至200,000,000厘泊粘度的二羟基聚硅氧烷共聚物 (i)和(ii),(iii)的总量的40〜85mol%为5〜300ppm的烷基锂催化剂,含有1〜12个碳原子的烷基成分和(iv )非质子溶剂,所述非质子溶剂能够溶解三聚物(i)和(ii)和共聚物产物,(b)使所述混合物在0℃至150℃之间的温度下反应以形成共聚物 ,和(c)从反应混合物中回收共聚物。