Patents by Inventor Kenichi Asahina
Kenichi Asahina 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: 6590041Abstract: The present invention provides a vinyl chloride resin having a high void ratio and micropores in the interior of particles thereof and allowing high level filling and distribution of various compounding additives a method of producing the same; a chlorinated vinyl chloride resin having good gelation properties and heat resistance and a method of producing the same; a chlorinated vinyl chloride resin having good heat resistance and manifesting good gelation properties and a method of producing the same; highly heat-resistant chlorinated vinyl chloride resin pipes and joints excellent in heat resistance and shock resistance; and highly heat-resistant chlorinated vinyl chloride resin plates excellent in heat resistance, shock resistance and chemical resistance; and heat-resistant vinyl chloride resin moldings excellent in heat resistance and smoothness and having a good appearance; heat-resistant vinyl chloride resin pipes having high heat resistance, excellent in smoothness.Type: GrantFiled: April 26, 2001Date of Patent: July 8, 2003Assignee: Sekisui Chemical Co., Ltd.Inventors: Yoshihiko Eguchi, Yuhki Gotoh, Hideki Inoue, Kenichi Asahina, Yukio Shibasaki, Yoshiaki Okusako, Yoshinobu Suenaga, Ryo Iijima
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Patent number: 5340654Abstract: An interlayer film for laminated glass comprising laminated layers of at least one layer (A) which comprises a plasticizer and polyvinyl acetal resin for which the number of carbon atoms in the acetal group is 4, 5 or 6 and the mole ratio of the average amount of the ethylene groups bonded to acetyl groups is 8-30 mole % of the total amount of the main chain ethylene groups, and at least one layer (B) which comprises a plasticizer and polyvinyl acetal resin for which the number of carbon atoms in the acetal group is 3 or 4 and the mole ratio of the amount of the average ethylene groups bonded to acetyl groups is 4 mole % or less of the total amount of the main chain ethylene groups.Type: GrantFiled: March 18, 1993Date of Patent: August 23, 1994Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Naoki Ueda, Kenichi Asahina, Hirohumi Omura, Jiro Miyai
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Patent number: 5190826Abstract: An interlayer for use in sound-insulating laminated glasses which is in the form of a laminated film of two kinds of resin films (A) and (B), each comprising a polyvinyl acetal acetalized with an aldehyde having 6 to 10 carbon atoms for the film (A) or with an aldehyde having 1 to 4 carbon atoms for the film (B), or is in the form of a resin film (C) comprising a mixture of the two kinds of polyvinyl acetal resins. The interlayer mitigates the coincidence effect to prevent the reduction of TL value without impairing the basic characteristics required of laminated glasses thereby permitting the interlayer to exhibit outstanding sound-insulating properties over a wide temperature range for a prolonged period of time.Type: GrantFiled: May 13, 1991Date of Patent: March 2, 1993Assignee: Sekisui Chemical Co., Ltd.Inventors: Kenichi Asahina, Naoki Ueda, Hirofumi Omura
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Patent number: 5068282Abstract: A heat transfer sheet comprises a substrate sheet and a heat transfer layer laminated on the substrate sheet and containing a dye which can be caused to migrate by heating to be transferred onto a transferable sheet, said heat transfer sheet containing a polyvinyl acetacetal resin as a binder component, the acetal moiety of said polyvinyl acetacetal resin being 50% by weight or more based on the total amount of the resin, and 80% by weight or more of said acetal moiety comprising polyvinyl acetacetal.A process for producing a polyvinyl acetacetal resin by the reaction of a polyvinyl alcohol and acetaldehyde in an aqueous phase in the presence of 4 to 10% by weight of an acid catalyst comprises initiating precipitation of an acetalated product by maintaining the reaction system at a temperature of 8.degree. to 17.degree. C. for 30 minutes or longer, and then maintaining said reaction at a temperature of 25.degree. to 40.degree. C.Type: GrantFiled: October 30, 1989Date of Patent: November 26, 1991Assignees: Dai Nippon Insatsu Kabushiki Kaisha, Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Jumpei Kanto, Masanori Akada, Katsuhiro Kamakari, Kenichi Asahina, Katsuaki Sakashita, Yoshihisa Watanabe
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Patent number: 4902670Abstract: A heat transfer sheet comprises a substrate sheet and a heat transfer layer laminated on the substrate sheet and containing a dye which can be caused to migrate by heating to be transferred onto a transferable sheet, said heat transfer sheet containing a polyvinyl acetacetal resin as a binder component, the acetal moiety of said polyvinyl acetacetal resin being 50% by weight or more based on the total amount of the resin, and 80% by weight or more of said acetal moiety comprising polyvinyl acetacetal.A process for producing a polyvinyl acetacetal resin by the reaction of a polyvinyl alcohol and acetaldehyde in an aqueous phase in the presence of 4 to 10% by weight of an acid catalyst comprises initiating precipitation of an acetalated product by maintaining the reaction system at a temperature of 8.degree. to 17.degree. C. for 30 minutes or longer, and then maintaining said reaction at a temperature of 25.degree. to 40.degree. C.Type: GrantFiled: December 11, 1987Date of Patent: February 20, 1990Assignees: Dai Nippon Insatsu Kabushiki Kaisha, Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Jumpei Kanto, Masanori Akada, Katsuhiro Kamakari, Kenichi Asahina, Katsuaki Sakashita, Yoshihisa Watanabe
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Patent number: 4397976Abstract: A composition for an interlayer film of a laminated safety glass, said composition comprising (A) a thermoplastic resin resulting from copolymerization of (1) vinyl chloride, (2) glycidyl methacrylate and (3) at least one monomer selected from the group consisting of ethylenic hydrocarbons, vinyl esters of fatty acids, acrylic esters and vinyl ethers, and (B) a plasticizer.Type: GrantFiled: July 21, 1981Date of Patent: August 9, 1983Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Tokuyama Sekisui Kogyo Kabushiki KaishaInventors: Takeshi Mori, Toshiyuki Takashima, Kenichi Asahina, Toshiharu Matsumiya, Ariyasu Sugita
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Patent number: 4389508Abstract: A composition for an interlayer film of a laminated safety glass, said composition comprising (A) a thermoplastic resin resulting from copolymerization of (1) vinyl chloride, (2) glycidyl methacrylate and (3) at least one monomer selected from the group consisting of ethylenic hydrocarbons, vinyl esters of fatty acids, acrylic esters and vinyl ethers, and (B) a plasticizer.Type: GrantFiled: September 21, 1981Date of Patent: June 21, 1983Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Tokuyama Sekisui Kogyo Kabushiki KaishaInventors: Takeshi Mori, Toshiyuki Takashima, Kenichi Asahina, Toshiharu Matsumiya, Ariyasu Sugita
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Patent number: 4382996Abstract: A composition for an interlayer film of a laminated safety glass, said composition comprising (A) a thermoplastic resin resulting from copolymerization of (1) vinyl chloride, (2) glycidyl methacrylate and (3) at least one monomer selected from the group consisting of ethylenic hydrocarbons, vinyl esters of fatty acids, acrylic esters and vinyl ethers, and (B) a plasticizer.Type: GrantFiled: July 21, 1981Date of Patent: May 10, 1983Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Tokuyama Sekisui Kogyo Kabushiki KaishaInventors: Takeshi Mori, Toshiyuki Takashima, Kenichi Asahina, Toshiharu Matsumiya, Ariyasu Sugita