Patents by Inventor Kenichi Isobe
Kenichi Isobe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5576096Abstract: Disclosed is a water repellent for fibers, comprising an acryl-silicone graft copolymer which is prepared by a radical copolymerization reaction of an organopolysiloxane compound containing one radical polymerizable group with radical polymerizable monomers including an acrylate, a methacrylate or a mixture thereof as a main member.Type: GrantFiled: October 16, 1995Date of Patent: November 19, 1996Assignee: Shin-Etsu Chemicals Co., Ltd.Inventors: Ichiro Ono, Kenichi Isobe, Hironori Tsukada, Kenji Ueji, Masakazu Komemushi
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Patent number: 5412004Abstract: A silicone polymer, a paste-like silicone composition prepared by kneading the silicone polymer and a silicone oil under a shearing force, and a water-in-oil type cosmetic composition comprising the paste-like silicone composition as an oil phase component are disclosed. The silicone polymer is prepared by the addition polymerization of components comprising an organohydrogenpolysiloxane R.sup.1.sub.a R.sup.2.sub.b H.sub.c SiO.sub.(4-a-b-c)/2 (1) or R.sup.1.sub.f H.sub.g SiO.sub.(4-f-g)/2 (2) and a polyoxyalkylene C.sub.m H.sub.2m-1 O(C.sub.2 H.sub.4 O).sub.h (C.sub.3 H.sub.6 O).sub.i C.sub.m H.sub.2m-l (A) or an organopolysiloxane R.sup.1.sub.j R.sup.4.sub.k SiO.sub.(4-j-k)/2 (B) the components, including (1) or (A) as an essential component. The silicone polymer can swell in silicone oils and function as a viscosity increasing agent for silicone oils.Type: GrantFiled: February 25, 1994Date of Patent: May 2, 1995Assignees: Kose Corporation, Shin-Etsu Chemical Co., Ltd.Inventors: Kiyomi Tachibana, Koji Sakuta, Kenichi Isobe
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Patent number: 5302685Abstract: Organopolysiloxane powder is prepared from an organopolysiloxane solution by admitting the organopolysiloxane solution into a planetary-screw mixer and agitating the solution at a sufficient temperature to allow a low-boiling liquid component to evaporate from the solution, thereby separating the low-boiling liquid component from the solution.Type: GrantFiled: June 17, 1993Date of Patent: April 12, 1994Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hiroshi Tsumura, Nobuhiko Kodana, Hidehiko Aonuma, Kenichi Isobe
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Patent number: 5256754Abstract: Hydrogenpolysiloxanes having a (meth)acryloxypropyl group on a side chain are useful intermediates. They are prepared by equilibration reaction of siloxane compounds.Type: GrantFiled: April 13, 1992Date of Patent: October 26, 1993Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Mitsuhiro Takarada, Yuji Yoshikawa, Kenichi Isobe
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Patent number: 5254644Abstract: A silicone self-adhesive composition is comprised of (A) high viscosity organopolysiloxane raw rubber, (B) MQ resin, (C) organohydrogenpolysiloxane, (D) platinum catalyst, and (E) high vinyl content organopolysiloxane. It cures at relatively low temperature into an adhesive layer which has good adhesive properties and heat resistance, finding use as heat resistant adhesive tapes and labels.Type: GrantFiled: May 8, 1992Date of Patent: October 19, 1993Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Takahide Kobori, Isamu Moriizumi, Mitsuhiro Takarada, Kenichi Isobe
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Patent number: 5248750Abstract: Organopolysiloxanes having two different functional groups selected from the group consisting of 3-glycidoxy-propyl, 2-(3',4'-epoxycyclohexyl)ethyl, 3-hydroxypropyl, 3-(2'-hydroxyethoxy)propyl, 3-acryloxypropyl, and 3-methacryloxypropyl groups are more compatible with organic resins and more effective for tailoring the organic resins. They are produced by hydrosilylation of organohydrogenpolysiloxanes with functional group-containing alkenes.Type: GrantFiled: October 29, 1991Date of Patent: September 28, 1993Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Mitsuhiro Takarada, Yuji Yoshikawa, Kenichi Isobe
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Patent number: 5202404Abstract: Silicone block polymers are obtained by cohydrolysis of a both end reactive diorganopolysiloxane and a silane or a partial hydrolyzate thereof or curing a both end reactive diorganopolysiloxane and an organopolysiloxane at room temperature or elevated temperatures. They have improved flexibility, stain resistance, thermal shock resistance, and water repellency and are suitable to form hard coatings, moistureproof coatings and topcoats.Type: GrantFiled: March 22, 1991Date of Patent: April 13, 1993Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Mitsuhiro Takarada, Kenichi Isobe
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Patent number: 5075349Abstract: A radiation-curable surface-releasing agent is proposed which is capable of giving surface releasability to a substrate surface by irradiation with electron beams or ultraviolet light exhibiting outstandingly low peeling resistance against peeling of pressure-sensitive adhesive tapes applied and bonded to the release-treated surface and very small migration of the releasing ingredient toward the adhesive surface. The surface-releasing agent is a composition comprising a linear diorganopolysiloxane having, only at one of the molecular chain ends, at least one (meth)acryloxy groups and a poly(meth)acrylate compound such as trimethylol propane tri(meth)acrylate, diethylene glycol di(meth)acrylate, pentaerithritol tri(meth)acrylate and the like.Type: GrantFiled: May 29, 1990Date of Patent: December 24, 1991Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Toshio Ohba, Kenichi Isobe
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Patent number: 4849491Abstract: A curable organopolysiloxane composition comprising:(A) an organopolysiloxane having at least two aliphatic unsaturated hydrocarbon groups,(B) a particular organohydrogenpolysiloxane having a group represented by the formula: ##STR1## wherein R.sup.3 is a substituted or unsubstituted monovalent hydrocarbon group and a is an integer of 2 or 3, and(C) a platinum catalyst.This composition has good curing properties, and the silicone film obtained by curing has good release properties which is stable for a long period of time.Type: GrantFiled: March 7, 1988Date of Patent: July 18, 1989Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masahiko Ogawa, Meguru Kashida, Kenichi Isobe
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Patent number: 4769204Abstract: The reactive injection molding of a urethane-based resin composition according to the invention is performed by admixing the polyol compound as one of the reactants of the urethane-based resin with a specific organopolysiloxane as an internal mold release agent so that the molding process can be performed without application of an external mold release agent to the metal mold. The organopolysiloxane is characterized by two types of substituent groups bonded to the silicon atoms, of which the first type is --C.sub.x H.sub.2x OR', R' being a monovalent hydrocarbon group of 8 to 30 carbon atoms free from chain end unsaturation and x being 0-4, and the second type is --C.sub.y H.sub.2y (OC.sub.n H.sub.2n).sub.m OH, y being 1-4, n being 2-4 and m being 0-45.Type: GrantFiled: December 2, 1986Date of Patent: September 6, 1988Assignees: Shin-Etsu Chemical Co., Ltd., MD Kasei LimitedInventors: Toshio Oba, Kenichi Isobe, Shintaro Tachibana, Kazuo Shoji
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Patent number: 4726964Abstract: The invention provides a method for imparting releasability to the surface of a plastic film or paper by coating the surface with an organopolysiloxane composition followed by curing, in which the curing is complete by heating at a relatively low temperature and the cured surface film of the composition is very stable and free from the problem of transfer to another body in contact therewith. The composition comprises a vinyl-containing organopolysiloxane, an organohydrogenpolysiloxane and a platinum compound to catalyze the addition reaction between the silicon-bonded vinyl groups and silicon-bonded hydrogen atoms. Different from conventional organohydrogenpolysiloxane having a linear molecular structure, the organohydrogenpolysiloxane used in the invention is represented by the general unit formula (RSiO.sub.1.5).sub.m (RHSiO.sub.0.5).sub.n, in which R is a monovalent hydrocarbon group free form unsaturation and m and n are each a positive integer with the proviso that the ratio of n/m is from 0.1 to 3.Type: GrantFiled: April 4, 1986Date of Patent: February 23, 1988Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kenichi Isobe, Hisashi Aoki, Yasuaki Hara, Meguru Kashida, Kiyohiro Kondow
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Patent number: 4665145Abstract: A composite polymeric material having a high permeability to oxygen is proposed comprising a vinyl chloride moiety, an organosilicon moiety and, optionally, a third polymeric moiety. Such a composite polymeric material can be prepared in several ways including copolymerization of vinyl chloride monomer, a polymerizable organosilicon compound and, optionally, a third monomer, graft-polymerization of a polymerizable organosilicon compound on to a polyvinyl chloride resin, graft-polymerization of vinyl chloride on to an organopolysiloxane, graft-copolymerization of vinyl chloride and a polymerizable organosilicon compound on to a third polymer and blending of the respective polymeric components.Type: GrantFiled: July 5, 1984Date of Patent: May 12, 1987Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Tohru Yokota, Kaname Inoue, Hajime Kitamura, Kenichi Isobe, Shoji Ichinohe, Takeji Yanagisawa
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Patent number: 4617335Abstract: The invention provides an efficient method for releasing a shaped body of a polymeric material such as a foamed polyurethane resin from a mold in which the body has been molded without the problem of adhesion to the mold. The inventive method comprises admixing the polymeric material with a specific organopolysiloxane represented by the structural formulaR.sup.1.sub.3 Si--O--SiR.sup.2.sub.2 --O).sub.m (SiR.sup.2 A--O).sub.n SiR.sup.1.sub.3,in which A is a substituent group represented by the general formula --C.sub.x H.sub.2x --O--R, R being a monovalent hydrocarbon group having 8 to 30 carbon atoms but free from terminal unsaturation and x being zero or a positive integer not exceeding 4, R.sup.1 is a monovalent hydrocarbon group or the same group as A, R.sup.2 is a hydrogen atom or the same group as R.sup.1, and m and n are each zero or a positive integer with the proviso that at least one group denoted by A is contained in a molecule of the organopolysiloxane.Type: GrantFiled: July 23, 1985Date of Patent: October 14, 1986Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Fumio Okada, Toshio Oba, Morizo Nakazato, Kenichi Isobe
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Patent number: 4594401Abstract: An oxygen permeable hard contact lens having an improved oxygen permeability and an improved hardness and rigidity and an improved refractive index, made of a polymer comprising a styrene containing a silyl or siloxanyl group having at most 15 silicon atoms.Type: GrantFiled: December 27, 1984Date of Patent: June 10, 1986Assignees: Shin-Etsu Chemical Co., Ltd., Toyo Contact Lens Co., Ltd.Inventors: Kozo Takahashi, Yasuharu Tahaka, Kenichi Isobe, Shoji Ichinohe
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Patent number: 4589920Abstract: Use of an ink composition containing an organopolysiloxane having at least one hydrophilic group can bring about such a lithographic printing using a dampening solution as the non-image area is hardly stained, the image area is given a sufficient density, emulsification hardly occurs and tolerance for change of printing conditions is high.Type: GrantFiled: October 7, 1983Date of Patent: May 20, 1986Assignees: Mitsubishi Paper Mills, Ltd., Shin-Etsu Chemical Ltd.Inventors: Eiji Kanada, Toshiro Kondo, Kenichi Isobe
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Patent number: 4525563Abstract: A copolymer comprising,(a) a hydrophilic siloxanylalkyl ester having a structure in which a siloxane part (1) having a terminal acryloyl or methacryloyl group and a siloxane part (2) having a terminal hydrophilic group are bonded through an alkylene chain with each other,(b) a hydrophilic monomer, and(c) a hydrophobic monomeris suitable for use in the production of a soft contact lens having a high oxygen permeability and an excellent affinity for the eye tissue which can be worn continuously for a long period of time.Type: GrantFiled: March 13, 1984Date of Patent: June 25, 1985Assignees: Toyo Contact Lens Co., Shin-Etsu Chemical Co., Ltd.Inventors: Takanori Shibata, Toshiharu Yoshikawa, Kenichi Isobe, Shoji Ichinohe
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Patent number: 4431789Abstract: The invention provides an organopolysiloxane having at least one polyhydric pendant group bonded to the silicon atom as derived from a polyglycerol compound. Such an organopolysiloxane is useful as a non-ionic surface active agent. The organopolysiloxane can be prepared by the hydrosilation reaction between an organohydrogenpolysiloxane having at least one hydrogen atom directly bonded to the silicon atom and a polyglycerol compound having an aliphatically unsaturated linkage in the molecule such as those obtained by the reaction of allyl alcohol and glycidol or by the reaction of diglycerin and allyl glycidyl ether.Type: GrantFiled: March 1, 1982Date of Patent: February 14, 1984Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Satoshi Okazaki, Kenichi Isobe
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Patent number: 4166110Abstract: A nail enamel composition prepared by dissolving a solid resin and an organopolysiloxane, particularly a copolymer having a polysiloxane structure and a polyoxyalkylene structure, together in an organic solvent. The composition forms a film on the surface of the finger-nail and the film thus formed can easily be peeled off.Type: GrantFiled: January 31, 1978Date of Patent: August 28, 1979Assignee: The Lion Dentrifice Co., Ltd.Inventors: Kenichi Isobe, Tatsuhiko Tsutsui, Takao Ueki, Toru Sema