充填シリコーン組成物および硬化シリコーン生成物

Japanese Patent JP2006501128

A

A method of preparing a hydrophobic partially aggregated colloidal silica, the method comprising reacting (a) a silica sol comprising at least one hydrophilic partially aggregated colloidal silica with (b) an organosilicon compound selected from (i) at least one organosilane having the formula R<1>aHbSiX4-b, (ii) at least one organocyclosiloxane having the formula (R<1>2SiO)m, (iii) at least one organosiloxane having the formula R<1>3SiO(R<1>SiO)nSiR<1>3, and (iv) a mixture comprising at least two of (i) (ii), and (iii), in the presence of (c) water (d) an effective amount of a water-miscible organic solvent, and (e) an acid catalyst, to produce the hydrophobic partially aggregated colloidal silica and an aqueous phase, wherein R<1> is hydrocarbyl or substituted hydrocarbyl; X is a hydrolysable group; a is 0, 1, ,2, or 3; b is 0 or 1; a + b = 1,2, or 3, provided when b = 1, a + B = 2 or 3; m has an average value of from 3 to 10; and n has an average value of from 0 to 10; and the hydrophobic partially aggregated colloidal silica produced by the method. The invention also provides a filled silicone composition comprising (A) a curable silicone composition and (B) 5 to 60% (w/w) of a hydrophobic partially aggregated colloidal silica; and a cured silicone product comprising a reaction product of the filled silicone composition.

Chao, Timothy

JP2004541507A

January 12, 2006

September 05, 2003

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DOW CORNING CORPORATION

C01B33/14; C01B33/141; C01B33/145; C01B33/146; C01B33/149; C08K9/04; C09C1/30; C09C1/36; C08K3/36

JPH01317115A	1989-12-21
JPH11157825A	1999-06-15
JP2000327321A	2000-11-28

Michiteru Soga
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order
Kazuhiro Oyaku

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