Shin-etsu Chemical Co., Ltd.

Daichi Todoroki

Tsutomu Nakamura

Masayuki Ikeno

Takashi Tanaka

Hidenori Mizushima

Shigeru Ubukata

Susumu Ueno

Minoru Igarashi

Yoshiaki Koike

Kohei Masuda

Masanobu Nishimine

Ryosuke Yoshii

Tomoya Minamikawa

Tomoya Ogata

A method for manufacturing granulated silica. The method includes granulating silica powders each having a primary particle size of 5 to 50 nm by use of water, and hydrophobizing each surface of the silica powders with a silicon atom-containing hydrophobizing agent before or simultaneously with the granulation step.

Method for manufacturing granulated silica

Provided is a millable silicone rubber composition capable of yielding a silicone rubber (cured product) superior in heat resistance. The composition contains:

Heat-resistant millable silicone rubber composition

A silicone rubber composition is provided comprising (A) an alkenyl-containing organopolysiloxane, (B) reinforcing silica, (C) an inorganic particle-polysiloxane composite comprising inorganic nanoparticles having a polysiloxane containing SiRROand SiRRROunits grafted to their surface, and (D) a curing agent. The composition cures into a transparent silicone rubber having UV-absorbing ability and heat resistance.

Silicone rubber composition and cured product thereof

Provided is a silicone rubber composition suited for use as a key pad having excellent dynamic fatigue durability (keying durability) and a silicone rubber key pad obtained by curing molding of the composition. A silicone rubber composition for making a key pad includes:

Silicone rubber composition for making key pad and key pad

Provided is a silicone rubber composition for extrusion molding, including: (A) 100 parts by mass of an organopolysiloxane represented by an average composition formula (1): RSiO(in the formula, Rrepresents identical or different, unsubstituted or substituted monovalent hydrocarbon groups, and n represents a positive number within a range from 1.95 to 2.04), (B) 0 to 50 parts by mass of a vinyl group-containing silicon compound, (C) 5 to 100 parts by mass of a reinforcing silica, and (D) an effective quantity of a curing agent, in which the vinyl group content relative to the combination of the components (A) through (D) is at least 1.0&#xd7;10mol/g. The composition yields a cured product for which the elastic modulus increases across a temperature range from 30 to 110&#xb0; C. and which is therefore capable of reducing the temperature dependency of acrylic optical fibers. The composition is suitable for extrusion molding.

Silicone rubber composition for extrusion molding

A liquid silicone rubber coating composition that is ideal for forming a coating on an air bag is provided. The composition includes: (A) an organopolysiloxane containing two or more alkenyl groups bonded to silicon atoms within each molecule, (B) an organohydrogenpolysiloxane containing at least two silicon atom-bonded hydrogen atoms within each molecule, (C) an addition reaction catalyst, (D) a finely powdered silica with a specific surface area of at least 50 m/g, (E) an organosilicon compound containing an epoxy group and a silicon atom-bonded alkoxy group within each molecule, and (F) a compound represented by a general formula: Al(OH)(OCOR)(wherein, R represents identical or different, unsubstituted or substituted monovalent hydrocarbon groups of 1 to 20 carbon atoms). Leakage of the inflator gas when the air bag is in an inflated state is suppressed, enabling production of an air bag that exhibits excellent sustainability of the inflation period.

Liquid silicone rubber coating composition, curtain air bag, and method of producing same

Provided is a liquid silicone rubber coating composition, including predetermined quantities of (A) an organopolysiloxane containing 2 or more Si atom-bonded alkenyl groups, (B) an organohydrogenpolysiloxane containing 2 or more SiH groups, (C) an addition reaction catalyst, (D) a finely powdered silica with a specific surface area of at least 50 m/g, (E) an organosilicon compound containing an epoxy group and a Si atom-bonded alkoxy group, and (F) an oxyzirconium compound. The composition is useful for producing a silicone rubber coating layer on the substrate surface of a curtain air bag. The air bag suppresses leakage of the inflator gas, thus enabling the inflation time to be sustained for a satisfactory period.

A liquid silicone rubber coating composition comprising (A) an organopolysiloxane containing silicon-bonded alkenyl radicals, (B) an organohydrogenpolysiloxane containing SiH radicals, (C) an addition reaction catalyst, (D) finely divided silica, (E) an organosilicon compound containing epoxy and alkoxy radicals, (F) an organic titanium, zirconium or aluminum compound, and (G) a silanol-containing silane or siloxane compound is coated on a surface of an airbag base fabric and cured to form a rubber coating layer thereon. The composition is suited for curtain airbags.

Liquid silicone rubber coating composition, curtain airbag and making method

A press-bonding anisotropic conductive resin composition comprising (A) an organopolysiloxane having on the average at least two alkenyl groups per molecule, (B) an adhesion promoter, (C) finely divided silica, (D) metallized conductive particles, and (E) a curing agent becomes an anisotropic conductor by press bonding. The conductive particles accommodate height variations among electrode terminals, allowing the composition to achieve stable interconnects between all electrode terminals.

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Annaka, Japan

Daichi Todoroki