Patents by Inventor Motoo Kawamata
Motoo Kawamata 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: 5593916Abstract: A holding container which is made of a polyether ether ketone resin and is suitable for use in holding one or more substrates upon fabrication of the corresponding number of thin-film semiconductor substrates useful in driving a planar display, for example, a liquid crystal display.Type: GrantFiled: June 7, 1995Date of Patent: January 14, 1997Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Yoshihisa Gotoh, Motoo Kawamata, Toshiaki Takahashi
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Patent number: 5455201Abstract: A holding container which is made of a polyether ether ketone resin and is suitable for use in holding one or more substrates upon fabrication of the corresponding number of thin-film semiconductor substrates useful in driving a planar display, for example, a liquid crystal display.Type: GrantFiled: November 12, 1993Date of Patent: October 3, 1995Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Yoshihisa Gotoh, Motoo Kawamata, Toshiaki Takahashi
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Patent number: 4506042Abstract: Disclosed is a curable resin composition comprising (a) at least one maleimide compound selected from the group consisting of N-(alkenylphenyl)maleimide derivatives, and dimers and polymers thereof and (b) one or more kinds of epoxy resins, each having at least one epoxy group in the unit molecule thereof. The resin composition may contain, besides the above two components, an amino compound as a further component (c). The resin composition may comprise a prepolymer of any two components among the three components (a), (b) and (c) and the remaining component. The resin compositions are useful as molding materials, for the fabrication of laminates, and as varnishes, including insulation varnishes and impregnating varnishes.Type: GrantFiled: April 4, 1983Date of Patent: March 19, 1985Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Hikotada Tsuboi, Motoo Kawamata, Masayuki Oba, Nobuhito Koga
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Patent number: 4500719Abstract: Disclosed are novel alkenylphenylmaleimide derivatives having the general formula ##STR1## where R is an alkenyl radical of from 3 to 12 carbon atoms, R' is a hydrogen atom, a halogen atom, or a straight-chain or branched alkyl radical of from 1 to 4 carbon atoms, and n is a whole number of from 1 to 4, and linear dimers thereof as well as a process for the preparation of such maleimide compounds.Type: GrantFiled: August 13, 1982Date of Patent: February 19, 1985Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Masayuki Oba, Motoo Kawamata, Hikotada Tsuboi, Nobuhito Koga
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Patent number: 4459234Abstract: A novel process for producing anthraquinone in good yields is provided which comprises reacting phthalic anhydride with benzene in a single step in the vapor phase in the presence of a catalyst comprising titanium oxide and/or tin oxide.Type: GrantFiled: May 30, 1980Date of Patent: July 10, 1984Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Motoo Kawamata, Shiro Fujikake
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Patent number: 4440920Abstract: Aromatic polyesters are obtained by copolycondensing isophthalic acid and terephthalic acid or derivatives thereof with bis(hydroxyphenyl) sulfone and 2,2-bis(4'-hydroxyphenyl)propane.These aromatic polyesters have excellent molding workability. From these polyesters, colorless, transparent moldings can be obtained by compression, extrusion or injection molding methods. The products thus obtained have excellent mechanical and electrical properties and improved heat resistance.Type: GrantFiled: December 10, 1982Date of Patent: April 3, 1984Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shiro Fujikake, Motoo Kawamata, Hikotada Tsuboi
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Patent number: 4401777Abstract: Disclosed is a curable resin composition comprising (a) at least one maleimide compound selected from the group consisting of N-(alkenylphenyl)maleimide derivatives, and dimers and polymers thereof and (b) one or more kinds of epoxy resins, each having at least one epoxy group in the unit molecule thereof. The resin composition may contain, besides the above two components, an amino compound as a further component (c). The resin composition may comprise a prepolymer of any two components among the three components (a), (b) and (c) and the remaining component. The resin compositions are useful as molding materials, for the fabrication of laminates, and as varnishes, including insulation varnishes and impregnating varnishes.Type: GrantFiled: October 20, 1981Date of Patent: August 30, 1983Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Hikotada Tsuboi, Motoo Kawamata, Masayuki Oba, Nobuhito Koga
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Patent number: 4400521Abstract: Maleimide compounds represented by the general formula (I) ##STR1## where R and R' are a hydrogen atom, a halogen atom, or an alkyl radical of from 1 to 4 carbon atoms, and n and n' are a whole number of from 1 to 4; and a process for the preparation of the maleimide compounds, in which a maleamic acid represented by the general formula (II) ##STR2## where R and R' are a hydrogen atom, a halogen atom, or an alkyl radical of from 1 to 4 carbon atoms, and n and n' are a whole number of from 1 to 4, is contacted with a dehydrating agent in an organic solvent.Type: GrantFiled: October 29, 1980Date of Patent: August 23, 1983Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Masayuki Oba, Motoo Kawamata, Hikotada Tsuboi, Nobuhito Koga
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Patent number: 4395531Abstract: Disclosed is a process for the preparation of polyamide compounds by reacting at least one polycarboxylic acid with at least one diisocyanate in the presence of a catalyst comprising at least one mono-alkali metal salt of dicarboxylic acid. The polyamide compounds prepared by this process have a substantially linear configuration and a high degree of polymerization and, therefore, are suitable for the manufacture of fibers, films and molded articles.Type: GrantFiled: February 23, 1982Date of Patent: July 26, 1983Assignee: Mitsui Toatsu Chemical IncorporatedInventors: Toshihiro Toyoda, Motoo Kawamata, Masanori Osawa, Masayoshi Itoh, Kazumi Mizutani, Masahiro Kono
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Patent number: 4390737Abstract: This invention relates to a process for the selective ortho-alkylation of a phenolic compound having at least one ortho-positioned hydrogen atom by catalytically reacting the phenolic compound with an alcohol in the vapor phase. In this process, the reaction of the phenolic compound with the alcohol is carried out at a temperature of from 300.degree. to 550.degree. C. in the presence of a catalyst containing manganese oxide, silicon oxide and one or more additives selected from group (A) consisting of germanium oxide, tin oxide and lead oxide, or a catalyst containing manganese oxide, silicon oxide, one or more additives selected from the aforesaid group (A), and one or more additives selected from group (B) consisting of alkali metal oxides and alkaline earth metal oxides.Type: GrantFiled: October 30, 1981Date of Patent: June 28, 1983Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Akihide Kudoh, Motoo Kawamata, Kazushi Ohshima, Makoto Kotani, Takeshi Tsuda, Satoshi Morita
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Patent number: 4388478Abstract: This invention relates to a process for the selective ortho-alkylation of a phenolic compound having at least one ortho-positioned hydrogen atom by catalytically reacting the phenolic compound with an alcohol in the vapor phase. In this process, the reaction of the phenolic compound with the alcohol is carried out at a temperature of from 300.degree. to 550.degree. C. in the presence of a catalyst containing manganese oxide and one or more additives selected from group (A) consisting of germanium oxide, tin oxide and lead oxide, or a catalyst containing manganese oxide, one or more additives selected from the aforesaid group (A), and one or more additives selected from group (B) consisting of alkali metal oxides and alkaline earth metal oxides. The catalyst used in this invention exhibits not only excellent catalytic activity in the selective ortho-alkylation of phenols, continuous stability of the activity, good shapeability and good mechanical strength but also effective utilization of alcohols.Type: GrantFiled: October 30, 1981Date of Patent: June 14, 1983Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Akihide Kudoh, Motoo Kawamata, Kazushi Ohshima, Makoto Kotani, Takeshi Tsuda, Fukuichi Aoki
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Patent number: 4376206Abstract: Disclosed are novel alkenylphenylmaleimide derivatives having the general formula ##STR1## where R is an alkenyl radical of from 3 to 12 carbon atoms, R' is a hydrogen atom, a halogen atom, or a straight-chain or branched alkyl radical of from 1 to 4 carbon atoms, and n is a whole number of from 1 to 4, and linear dimers thereof as well as a process for the preparation of such maleimide compounds.Type: GrantFiled: March 19, 1980Date of Patent: March 8, 1983Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Masayuki Oba, Motoo Kawamata, Hikotada Tsuboi, Nobuhito Koga
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Patent number: 4375566Abstract: A process for producing selectively o-alkylated phenols wherein an anisole having at least one ortho positioned hydrogen atom is contacted with a mixed oxide catalyst in the vapor phase.Type: GrantFiled: May 18, 1981Date of Patent: March 1, 1983Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Motoo Kawamata, Kazushi Ohshima, Mitsuo Onofusa, Akihide Kudoh, Makoto Kotani, Takeshi Tsuda
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Patent number: 4361709Abstract: A process for the production of alkyl phenols having at least one o-alkyl radical comprising catalytically reacting a phenolic compound having at least one o-positioned hydrogen atom with an alcohol in the vapor phase in the presence of a manganese oxide containing catalyst modified with a compound of at least one of the alkali metals.Type: GrantFiled: May 20, 1981Date of Patent: November 30, 1982Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Motoo Kawamata, Kazushi Ohshima, Mitsuo Onofusa, Akihide Kudoh, Makoto Kotani, Takeshi Tsuda
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Patent number: 4323662Abstract: Disclosed is a thermosetting resin composition comprising (a) a bismaleimide and/or a polymaleimide and (b) at least one member selected from alkenylaniline derivatives, linear dimers thereof, and polymers thereof. In addition to components (a) and (b), this resin composition can contain (c) a polymerizable unsaturated substance.Type: GrantFiled: July 8, 1980Date of Patent: April 6, 1982Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Masayuki Oba, Motoo Kawamata, Hikotada Tsuboi, Nobuhito Koga
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Patent number: 4289699Abstract: N-(hydroxyphenyl) maleimides of the general formula ##STR1## where R' stands for H, CH.sub.3, C.sub.2 H.sub.5, F, Cl, Br or I and n is an integer of 1-5 are produced by treating the corresponding maleamic acid or by treating the ester of said N-(hydroxyphenyl) maleimide at a temperature of 0.degree.-150.degree. C. in the presence of at least one dehydrating agent selected for the group consisting of oxides and oxyacids of sulfur or phosphorus and alkali metal and alkaline earth metal salts of the said oxyacids. The corresponding maleamic acid can be obtained by reacting an aminophenol having one or more hydroxyl groups on its phenyl nucleus with maleic anhydride. The esters of the N-(hydroxyphenyl maleimide) can be obtained by reacting said aminophenol and said maleic anhydride in the presence of a conventional acid anhydride dehydrating agent and a conventional imide-forming cyclization catalyst.Type: GrantFiled: October 26, 1979Date of Patent: September 15, 1981Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Masayuki Oba, Motoo Kawamata, Hikotada Tsuboi, Nobuhito Koga
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Patent number: 4231934Abstract: N-(hydroxyphenyl) maleimides of the general formula ##STR1## where R' stands for H, CH.sub.3, C.sub.2 H.sub.5, F, Cl, Br or I and n is an integer of 1-5 are produced by treating the corresponding maleamic acid or by treating the ester of said N-(hydroxyphenyl) maleimide at a temperature of 0-150.degree. C. in the presence of at least one dehydrating agent selected from the group consisting of oxides and oxyacids of sulfur or phosphorus and alkali metal and alkaline earth metal salts of the said oxyacids. The corresponding maleamic acid can be obtained by reacting an aminophenol having one or more hydroxyl groups on its phenyl nucleus with maleic anhydride. The esters of the N-(hydroxyphenyl maleimide) can be obtained by reacting said aminophenol and said maleic anhydride in the presence of a conventional acid anhydride dehydrating agent and a conventional imide-forming cyclization catalyst.Type: GrantFiled: November 2, 1978Date of Patent: November 4, 1980Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Masayuki Oba, Motoo Kawamata, Hikotada Tsuboi, Nobuhito Koga
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Patent number: 4227023Abstract: This invention relates to a process for the selective ortho-alkylation of a phenolic compound having at least one ortho-positioned a hydrogen atom by catalytically reacting the phenolic compound with an alcohol in the vapor phase. In this process, the reaction of the phenolic compound with the alcohol is carried out at a temperature of from 300.degree. to 550.degree. C. in the presence of a mixed oxide catalyst of manganese, silicon, and one or more additives selected from the group consisting of magnesium oxide, calcium oxide, strontium oxide, and barium oxide. The catalyst used in this invention exhibits not only excellent catalytic activity in the selective ortho-alkylation of phenols but also continuous stability of the activity, good shapability, and good mechanical strength.Type: GrantFiled: December 4, 1978Date of Patent: October 7, 1980Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Motoo Kawamata, Tadamitsu Kiyoura, Kazushi Ohshima, Yasuo Kogure, Akihide Kudoh, Makoto Kotani
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Patent number: 4208537Abstract: The selective alkylation of a phenolic compound having a hydrogen atom in at least one of the ortho positions is achieved by reacting the phenolic compound with an alcohol in the vapor phase in the presence of a catalyst containing mixed oxides of chromium and tin. The catalyst can additionally contain iron oxide, sulfate radical, or a combination thereof.Type: GrantFiled: November 27, 1978Date of Patent: June 17, 1980Assignee: Mitsui Toatsu Chemicals IncorporatedInventors: Motoo Kawamata, Kazushi Ohshima, Akihide Kudoh, Makoto Kotani