发明名称 |
Compositions of resin-linear organosiloxane block copolymers |
摘要 |
Curable compositions of “resin-linear” organosiloxane block copolymers comprising a metal ligand complex are disclosed. The addition of a metal ligand complex to compositions of certain resin-linear organosiloxane block copolymers results in curable compositions having faster cure rates, and improved mechanical strength and/or thermal stability over similar compositions without the metal ligand complex. |
申请公布号 |
US9175140(B2) |
申请公布日期 |
2015.11.03 |
申请号 |
US201314386213 |
申请日期 |
2013.03.14 |
申请人 |
Dow Corning Corporation |
发明人 |
Swier Steven |
分类号 |
C08G77/44;C09D183/14;C08L83/10;C08K3/22;C09D183/10;H01L33/56;C08G77/00 |
主分类号 |
C08G77/44 |
代理机构 |
Schwegman Lundberg & Woessner, P.A. |
代理人 |
Schwegman Lundberg & Woessner, P.A. |
主权项 |
1. A curable composition comprising:
i) an organosiloxane block copolymer comprising:
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];wherein:
each R1, at each occurrence, is independently a C1 to C30 hydrocarbyl,each R2, at each occurrence, 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/mole, 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; andthe organosiloxane block copolymer has a weight average molecular weight (Mw) of at least 20,000 g/mole; and ii) a metal ligand complex. |
地址 |
Midland MI US |