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    • 3. 发明申请
    • THERMALLY STABLE COMPOSITIONS CONTAINING RESIN-LINEAR ORGANOSILOXANE BLOCK COPOLYMERS
    • 含有线性有机硅氧烷嵌段共聚物的热稳定组合物
    • US20130165602A1
    • 2013-06-27
    • US13822122
    • 2011-09-22
    • John Bernard HorstmanRandall SchmidtSteven Swier
    • John Bernard HorstmanRandall SchmidtSteven Swier
    • C08G77/44
    • C08G77/44C08G77/04C08G77/14C08G77/16C08G77/26C08G77/48C08G77/54C08G77/70C08G77/80H01L23/296H01L2924/0002H01L2924/00
    • Solid compositions of organosiloxane block copolymers are disclosed having a tensile strength greater than 1.0 MPa and a % elongation at break greater than 40%. The organosiloxane block copolymers comprise: 40 to 90 mole percent disiloxy units of the formula [R12SiO2/2] 10 to 60 mole percent trisiloxy units of the formula [R2SiO3/2] 0.5 to 35 mole percent silanol groups [≡SiOH] where R1 is independently a C1 to C30 hydrocarbyl, R2 is independently a C1 to C20 hydrocarbyl, wherein; the disiloxy units [R12SiO2/2] are arranged in linear blocks having an average of from 10 to 400 disiloxy units [R12SiO2/2] per linear block, the trisiloxy units [R2SiO3/2] are arranged in non-linear blocks having a molecular weight of at least 500 g/mol, and at least 30% of the non-linear blocks are crosslinked with each other, each linear block is linked to at least one non-linear block, and the organosiloxane block copolymer has a molecular weight (Mw) of at least 20,000 g/mole.
    • 公开了具有大于1.0MPa的拉伸强度和断裂伸长率大于40%的有机硅氧烷嵌段共聚物的固体组合物。 有机硅氧烷嵌段共聚物包括:40至90摩尔%的式[R 12 SiO 2/2]的10至60摩尔%的式[R 2 SiO 3/2]的三甲氧基单元的摩尔比为0.5至35摩尔%的硅烷醇基[= SiOH]的式 独立地为C 1至C 30烃基,R 2独立地为C 1至C 20烃基,其中; 二甲硅烷氧基单元[R 12 SiO 2/2]排列成每线性嵌段平均为10〜400个二甲硅烷基单元[R 12 SiO 2/2]的线性嵌段,三硅氧烷单元[R 2 SiO 3/2]排列在具有分子 至少500g / mol的重量,至少30%的非线性嵌段彼此交联,每个直链嵌段连接至少一个非线性嵌段,有机硅氧烷嵌段共聚物的分子量( Mw)至少为20,000g / mol。