Dow Corning Toray Silicone Company Limited

Ngk Insulators, Inc.

Katsuya Baba

Akito Nakamura

Hiroshi Honma

Takao Matsushita

Kazuo Hirai

Manabu Suto

Isao Nakajima

Takayuki Takeda

A silicone rubber sponge composition, a silicone rubber sponge, and a process for making a silicone rubber sponge. The silicone rubber sponge composition comprises (A) 100 parts by weight of an organopolysiloxane gum described by average structural unit R SiO , where R is a monovalent hydrocarbon radical or haloalkyl and a is 1.95 to 2.05, (B) 1 to 400 parts by weight of an inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles (D) a mixture of (a) water-soluble silicone and (b) water in an amount such that the water in the mixture is equivalent to 0.01 to 10 parts by weight per 100 parts by weight of component (A), and (E) a curing agent in an amount sufficient to cure the composition.

Silicone rubber sponge composition and sponge articles therefrom

A silicone rubber sponge composition, a silicone rubber sponge, and a process for production thereof. The silicone rubber sponge composition comprises (A) 100 parts by weight organopolysiloxane gum described by average structural unit R SiO , where R is a monovalent hydrocarbon group or haloalkyl and a is 1.8 to 2.3 and having a viscosity at 25&deg; C. of 1,000,000 mPa&middot;s or above, (B) 1 to 400 parts by weight inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles, (D) 0.01 to 10 parts by weight a water-in-oil emulsion with silicone oil an oil phase, and (E) a curing agent in an amount sufficient to cure the composition.

Silicone rubber sponge composition, sponge, and process for making

A silicone rubber sponge composition, a silicone rubber sponge, and a process for production thereof. The silicone rubber sponge composition, comprises (A) 100 parts by weight organopolysiloxane gum described by average structural unit R,SiO,, where R is a monovalent hydrocarbon group or haloalkyl and a is 1.8 to 2.3 and having a viscosity at 25&deg; C. of 1,000,000 mPa&middot;s or above, (B) 1 to 400 parts by weight inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles, (D) 0.1 to 10 parts by weight thermally decomposable blowing agent, and (E) a curing agent in an amount sufficient to cure the composition.

Silicone rubber sponge composition

A silicone rubber sponge composition, a silicone rubber sponge, and a process for making a silicone rubber sponge. The silicone rubber sponge composition comprises (A) 100 parts by weight of an organopolysiloxane gum described by average structural unit R,SiO,, where R is a monovalent hydrocarbon radical or haloalkyl and a is 1.95 to 2.05, (B) 1 to 400 parts by weight of an inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles (D) a mixture of (a) water-soluble silicone and (b) water in an amount such that the water in the mixture is equivalent to 0.01 to 10 parts by weight per 100 parts by weight of component (A), and (E) a curing agent in an amount sufficient to cure the composition.

A silicone rubber sponge composition, a silicone rubber sponge, and a process for making the silicone rubber sponge. The silicone rubber sponge composition comprises (A) 100 parts by weight organopolysiloxane gum described by average structural unit R,SiO,, where R is a monovalent hydrocarbon group or haloalkyl and a is 1.8 to 2.3 and having a viscosity of 1,000,000 mPa&middot;s or above at 25&deg; C., (B) 1 to 400 parts by weight inorganic filler, (C) 0.01 to 50 parts by weight hollow thermoplastic resin particles, (D) 0.1 to 10 parts by weight liquid compound with a boiling point above room temperature, and (E) a curing agent in an amount sufficient to cure the composition.

Silicone rubber sponge composition, silicone rubber sponge, and process for making the sponge

A silicone rubber composition, comprising: (A) an polyorganosiloxane gum represented by the following average structural formula: R,SiO,(where R is a substituted or non-substituted monovalent hydrocarbon, and a is a number between 1.8 and 2.3); (B) microparticulate silica; and (C) a methyl-substituted benzoyl peroxide having the maximum grain diameter not exceeding 50 &mgr;m and an average grain diameter of 30 &mgr;m. When cured, the silicone rubber composition has reduced nonuniformity in the physical properties because of fewer voids, resulting in decreased frequency of spark-outs in the insulated wires.

Silicone rubber composition

A silicone rubber base compound for electrical wire coating such that when it is extruded using an extruding machine having a variable screw with an L/D&equals;10 and a die with a diameter of 1 mm attached thereto at a barrel and head temperature of 70&deg; C., the per-minute extruder output rate at a screw rotation speed of 100 rpm is not less than 1.2 times the extruder output rate at a screw rotation speed of 50 rpm, a silicone rubber composition for electrical wire coating obtained by compounding diacyl organic peroxide consisting of carbon atoms, hydrogen atoms, and oxygen atoms with the silicone rubber base compound for electrical wire coating, and a process for the production of silicone rubber coated electrical wire using the silicone rubber composition for electrical wire coating.

Silicone rubber base compound for electrical wire coating, silicone composition for electrical wire coating, and process for the production of silicone rubber coated electrical wire

A silicone rubber composition that does not foam or evolve an unpleasant odor during its cure and that cures into low-surface-tack, non-yellowing silicone rubber moldings comprises:

Silicone rubber composition and method for molding silicone rubber

An insulator includes a housing portion. The housing portion is composed a silicone rubber obtained by curing a composition containing diorganopolysiloxane (A) and a fine silicon powder (B) by heating, and a methylalkylpolysiloxane oil (C). The diorganopolysiloxane has at least two silicon atom-bonded alkenyl groups in one molecule. The methylalkyl-polysiloxane oil (C) has each of both terminal ends of each molecular chain blocked with a trialkysiloxy group and possessing a viscosity at 25.degree. C. being 1 to 1,000 centistokes, and is incorporated into the above composition in an amount of 1-100 parts by weight per 100 parts by weight of the component (A).

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Chiba Prefecture, Japan

Katsuya Baba