Shin-etsu Chemical Co., Ltd.

Dai Nippon Printing Co., Ltd.

Sony Corporation

Kirin Beer Kabushiki Kaisha

Tomoegawa Paper Co., Inc.

Mitsubishi Gas Chemical Company, Inc.

Shin-etsu Kagako Kogyo Kabushiki Kaisha

Shin-etsu Chemical Industry Co., Ltd.

Yoshio Inoue

Minoru Takamizawa

Masatoshi Arai

Masaharu Takahashi

Hiroshi Yoshioka

Atsumi Noshiro

Tsuneo Kimura

Minoru Igarashi

Susumu Sekiguchi

Masachika Yoshino

Koji Yokoo

Masashi Somezawa

Hitoshi Fujii

Hironao Fujiki

Shinichi Sato

Yasushi Yamamoto

Atsushi Yaginuma

Naoki Omura

Takehide Okami

Takeo Inoue

Hiroyuki Obata

Yoshifumi Inoue

Kazuma Momii

Kaoru Nakajima

Shigeo Kimura

Kunio Kobayashi

Toshikazu Sugita

Shuichi Yokokura

Kunio Itoh

Masanori Akada

Toshio Takago

Takeo Yoshida

Hisashi Shimizu

Kei Miyoshi

Hitoshi Kinami

Fumio Okada

Yasuaki Hara

Kazutoshi Fujioka

Satoshi Takeuchi

Kazuyuki Suzuki

Masami Terashima

Akira Abe

Tokuo Sato

Tomiyoshi Tsuchida

Shiro Gomyo

Ken-ichi Takita

Hiroyuki Koda

Kipp J Mize

Kenichi Tanaka

Tetsuo Tomizawa

Yasuo Kurihara

Sekiguchi Susumu

Toshiaki Izumita

Yukio Kojima

Kohichi Nakamura

Makoto Ogiwara

Yuji Harazaki

Masaki Moteki

Takashi Toida

Yu Horie

Kenji Cho

Hsashi Aoki

Akiro Yokoo

Akiteru Yoshida

Shiniti Sato

Weak current wire

A room temperature curable mildew resistant organopolysiloxane composition comprises (A) a hydroxyl or hydrolyzable group-containing organopolysiloxane, (B) a hydrolyzable organosilane such as methyltrimethoxysilane, methyltris(methylethylketoxime silane) or vinyltris(methylethylketoxime silane), a partially hydrolyzed product thereof or a mixture of the hydrolyzable organosilane with the partially hydrolyzed product thereof; and (C) a triazolyl group-containing compound such as 2-(4-chlorophenyl)ethyl-.alpha.-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-yl -ethanol. Preferably, the component (B) does not contain aliphatic unsaturation in the molecule, and in this case, the component (B) free of aliphatic unsaturation is used in combination with (B') a hydrolyzable silane such as tetrakis(dimethylketoxime)silane, a partially hydrolyzed product thereof or a mixture of the hydrolyzable silane and the partially hydrolyzed product thereof.

Mildew resistant organopolysiloxane with hydrolyzable organosilane and

This composition comprises (A) a diorganopolysiloxane terminated with hydroxyl groups at both ends of its molecular chain having a viscosity of 25 to 1,000,000 cSt at 25.degree. C., (B) a low molecular weight organosilane or straight chain organosiloxane having silanol groups, such as HO(Me.sub.2 SiO)H, Me.sub.3 SiO[Me(OH)SiO].sub.2 SiMe.sub.3 or mixtures thereof, (C) a hydrolyzable silane, and (D) a silica filler having a specific surface area of 50 m.sup.2 /g or more. The composition has good non-flowability and exhibits good application workability when surface-finishing with spatula, and therefore is useful as building sealing materials.

Room temperature curable organopolysiloxane composition

The silicone rubber composition of the present invention comprises (A) an organopolysiloxane obtained by mixing and heating an organopolysiloxane having a silanol group at both ends of the molecular chain and a silane or a siloxane having two hydrolyzable groups in the molecule, (B) a finely divided silica, and (C) a curing agent. The composition, wherein the content of low-molecule siloxanes is remarkably constrained, is quite useful in the application wherein low-molecular siloxanes are obnoxious, for example, in the application of electrical contacts and parts used adjacent thereto, roll materials of copying machines, gaskets for construction, etc.

Silicone rubber composition

A method of producing a silicone rubber composition, comprising heating a mixture of an organopolysiloxane having a silanol group at both the ends of the molecular chain, a end blocking agent, such as a triorganosilanol, a silane or a siloxane having two dialkylaminosilyl groups in the molecule, and a reinforcing filler thereby carrying out chain lengthening and end blocking of said organopolysiloxane. According to this method, a silicone rubber composition whose low-molecular siloxane content is held down remarkably can be produced without consuming a large amount of energy for the mixing.

Method of producing silicone rubber compositions

A manufacturing method of organosilanes having silanol groups which is characterized by mixing organoalkoxy silanes, having at most a 20 ppm content of chlorine, expressed by the general chemical formula (1) below:

Method for manufacturing organosilanes having silanol groups

A room temperature vulcanizable composition comprises a diorganopolysiloxane blocked with a silanol group at both ends of the molecular chain, an organopolysiloxane having at least three silanol groups in the molecule, and at least one member selected from the group consisting of organosilanes and organopolysiloxanes each having two hydrolyzable groups in one molecule. The composition ensures easy control of its working life and is able to yield a cured product having a low modulus over a long time.

Room temperature vulcanizable organopolysiloxane composition

A siloxane gum is prepared by adding a silane or siloxane having two hydrolyzable groups in a molecule to a silanol-terminated organopolysiloxane in such an amount to give a molar ratio of silanol group/hydrolyzable group of from 0.5 to 3 and effecting condensation polymerization. The resulting organopoly-siloxane has a degree of polymerization of higher than 1,000 and a minimized content of low-molecular weight cyclic siloxanes of less than 5,000 ppm.

Process for preparing organopolysiloxane gum

A silicone rubber composition mainly comprising an organopolysiloxane of the average compositional formula: R.sub.n.sup.1 SiO.sub.(4-n)/2 wherein R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group and n=1.98 to 2.02 can be rendered antibacterial and antifungal by blending a zeolite containing 0.1 to 15% by weight of a silver ion.

Antibacterial, antifungal silicone rubber composition

A conductive silicone rubber composition is prepared by mixing an organopolysiloxane having an aminoalkyl radical, an organopolysiloxane having a (meth)acryloxyalkyl or glycidoxyalkyl radical, and conductive carbon black to form silicone rubber composition (A) in which the carbon black is fixed, and then mixing it with a silicone rubber composition (B) comprising a dimethylpolysiloxane. The composition has stable resistivity in the semiconductive region independent of molding conditions.

Preparation of conductive silicone rubber composition

Organopolysiloxanes having a silanol group at both terminal ends of molecular chain thereof are brought into condensation reaction with each other in the presence of a silane or siloxane having at least two dialkylaminosilyl groups per molecule as a condensation catalyst and a triorganosilanol or other endblocking agent, to lengthen the chain of the organopolysiloxane under reaction, whereby a triorganosilyl-endblocked organopolysiloxane with a high polymerization degree is obtained. The process yields a triorganosilyl-endblocked high-polymerization-degree organopolysiloxane while effectively suppressing or preventing the formation of low-molecular-weight siloxanes.

Process for producing organopolysiloxane with high polymerization degree

An air bag coating composition is obtained by emulsifying (A) an organopolysiloxane containing at least two alkenyl groups each attached to a silicon atom, (B) an organohydrogenpolysiloxane containing at least three hydrogen atoms each attached to a silicon atom, and (C) a curing catalyst in water in the presence of an emulsifier to form an aqueous silicone emulsion. The composition cures into a coating which firmly adheres to an air bag base fabric and provides a tack-free surface.

Air bag coating composition and air bag

A silicone rubber composition comprising (A) an organopolysiloxane, (B) an organic peroxide and (C) carbon black cures under anaerobic conditions into silicone rubber having improved physical properties. A composition further comprising (D) an organopolysiloxane copolymer consisting essentially of M and Q units in a molar M/Q ratio of 6/10 to 9/10 forms an anaerobic adhesive composition which is a useful sealant.

Silicone rubber curing and anaerobic silicone rubber composition therefor

A UV and moisture-curable organopolysiloxane composition comprising (i) an organopolysiloxane terminated with a radical of formula (1): ##STR1## wherein R.sup.1 is a hydrogen atom or monovalent hydrocarbon radical, each of R.sup.2 and R.sup.3 is a divalent hydrocarbon radical which may contain a NH bond or ether bond, each of R.sup.4 and R.sup.5 is a monovalent hydrocarbon radical which may contain an ether bond, and a is equal to 0 or 1, (ii) a photo-polymerization initiator, and (iii) a curing catalyst. The composition readily cures either upon exposure to UV radiation or upon contact with moisture and from the surface to the deep interior within a short time, yielding cured products having satisfactory physical properties.

UV and moisture-curable organopolysiloxane compositions, cured products

Impression composition

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Annaka, Japan

Yoshio Inoue