Title:
樹脂-直鎖状オルガノシロキサンブロックコポリマーの調製方法
Document Type and Number:
Japanese Patent JP2013540169
Kind Code:
A
Abstract:
Organosiloxane block copolymers, curable compositions, and solid compositions derived from these block copolymers are disclosed. The organosiloxane block copolymers comprise: 40 to 90 mole percent disiloxy units of the formula [R12—SiO2/2] 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.
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Inventors:
John Bernard Horstman
Steven swire
Steven swire
Application Number:
JP2013529429A
Publication Date:
October 31, 2013
Filing Date:
September 21, 2011
Export Citation:
Assignee:
DOW CORNING CORPORATION
International Classes:
C08G77/44
Domestic Patent References:
| JPS5036256B1 | 1975-11-22 | |||
| JPS5483957A | 1979-07-04 | |||
| JPS4944937B1 | 1974-11-30 |
Attorney, Agent or Firm:
Kenji Sugimura
Kengo Yoshida
Yoshie Sakurada
Kengo Yoshida
Yoshie Sakurada