Patents by Inventor Takeshi Komai
Takeshi Komai 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: 5210164Abstract: A novel peroxy aryl carbonate which has the both properties of polymerization-initiating and regulating abilities, can be used as a radical polymerization initiator to regulate the polymerization rate, the polymerization degree and molecular weight distribution of the polymer and the like, and therefore produce superior styrene resin and methyl methacrylate syrup.Type: GrantFiled: September 27, 1989Date of Patent: May 11, 1993Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Takeshi Komai, Kazuo Matsuyama, Isao Honma
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Patent number: 5008353Abstract: A novel peroxy aryl carbonate which has the both properties of polymerization-initiating and regulating abilities, can be used as a radical polymerization initiator to regulate the polymerization rate, the polymerization degree and molecular weight distribution of the polymer and the like, and therefore produce superior styrene resin and methyl methacrylate syrup.Type: GrantFiled: November 14, 1988Date of Patent: April 16, 1991Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Takeshi Komai, Kazuo Matsuyama, Isao Honma
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Patent number: 5004780Abstract: A novel cyclic monoperoxyketal represented by the following general formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 represent hydrogen atoms, or same or different alkyl groups having 1-3 carbon atoms, R.sup.4 represents an alkyl group having 1-5 carbon atoms, R.sup.5 represents an alkyl group having 1-3 carbon atoms, and R.sup.6 and R.sup.7 may be separate groups, in which R.sup.6 represents an alkyl group having 1-3 carbon atoms and R.sup.7 represents an alkyl group having 2-10 carbon atoms, a cycloalkyl group or an aryl group, or may be combined into a cylcoalkylene group having 3-12 carbon atoms, has high stability and excellent decomposition property, and is useful as a polymerization initiator of unsaturated monomers and as a curing agent of unsaturated polyester resin.Type: GrantFiled: March 8, 1989Date of Patent: April 2, 1991Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Kazuo Matsuyama, Takashi Sugiura, Takeshi Komai
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Patent number: 4970244Abstract: Photopolymerization initiators of the general formula: ##STR1## wherein R.sub.1 and R.sub.1 ' independently stand for a tertiary alkyl group or a tertiary aralkyl group and R.sub.2 and R.sub.2 ' independently stand for a hydrogen atom, a tertiary alkoxy group, or a tertiary aralkyloxy group are disclosed. They are useful for effecting polymerization of radically polymerizable unsaturated compounds.Type: GrantFiled: June 3, 1985Date of Patent: November 13, 1990Assignee: Nippon Oil & Fats Company, Ltd.Inventors: Takeshi Komai, Mamoru Shimizu
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Patent number: 4929747Abstract: A novel peroxy aryl carbonate which has the both properties of polymerization-initiating and regulating abilities, can be used as a radical polymerization initiator to regulate the polymerization rate, the polymerization degree and molecular weight distribution of the polymer and the like, and therefore produce superior styrene resin and methyl methacrylate syrup.Type: GrantFiled: August 13, 1986Date of Patent: May 29, 1990Assignee: Nippon Oil & Fats Company, Ltd.Inventors: Takeshi Komai, Kazuo Matsuyama, Isao Honma
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Patent number: 4923905Abstract: A light curable dental composition is provided. The composition comprises an ethylenic unsaturated compound and a light polymerization initiator. The light polymerization initiator is a combination of an .alpha.-diketone and a polyperoxy ester containing a benzophenone group and represented by the general formula (I) of: ##STR1## wherein R.sub.1 and R.sub.1 ' represent a tertiary alkyl group or a tertiary aralkyl group and R.sub.2 and R.sub.2 ' represent a hydrogen atom, a tertiary alkoxy group or a tertiary aralkyloxy group.Type: GrantFiled: February 26, 1988Date of Patent: May 8, 1990Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Eiichi Masuhara, Yoshinori Kadoma, Takeo Matsumoto, Takeshi Komai, Eiichi Yamada, Osamu Nakachi, Godo Irukayama
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Patent number: 4777191Abstract: Photopolymerization initiators of the general formula: ##STR1## wherein R.sub.1 and R.sub.1 ' independently stand for a tertiary alkyl group or a tertiary aralkyl group and R.sub.2 and R.sub.2 ' independently stand for a hydrogen atom, a tertiary alkoxy group, or a tertiary aralkyloxy group are disclosed. They are useful for effecting polymerization of radically polymerizable unsaturated compounds. Tetra peroxy esters of benzophenone are preferred.Type: GrantFiled: November 5, 1987Date of Patent: October 11, 1988Assignee: Nippon Oil & Fats Co., Ltd.Inventors: Takeshi Komai, Mamoru Shimizu
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Patent number: 4746685Abstract: A light curable dental composition is provided. The composition comprises an ethylenic unsaturated compound and a light polymerization initiator. The light polymerization initiator is selected from a combination of an organic peroxide and a pyrylium salt compound of: ##STR1## Wherein R.sub.1, R.sub.2, and R.sub.3 each represents a hydrogen atom, an alkyl group and the like, X stands for an oxygen or sulfur atom and Y for an anionic functional group; a polyperoxy ester containing a benzophenone group; and a combination the polyperoxy ester and an .alpha.-diketone.Type: GrantFiled: August 23, 1985Date of Patent: May 24, 1988Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Eiichi Masuhara, Yoshinori Kadoma, Takeo Matsumoto, Takeshi Komai, Eiichi Yamada, Osamu Nakachi, Godo Irukayama
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Patent number: 4734135Abstract: An aqueous suspension of a solid organic peroxide is produced by mixing a solid organic peroxide having a difference of at least 5.degree. C. between the melting point and the thermal decomposition temperature thereof with a protective colloid, a surface active agent, and water thereby forming an aqueous emulsion and subsequently cooling this aqueous emulsion.Type: GrantFiled: September 28, 1983Date of Patent: March 29, 1988Assignee: Nippon Oil & Fats Co., Ltd.Inventors: Nobuyuki Satomi, Kazuo Matsuyama, Takeshi Komai
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Patent number: 4533699Abstract: A sizing agent for the treatment of glass fibers contains as principal components a film-forming agent, which is a copolymer of a specific unsaturated peroxycarbonate and an unsaturated monomer containing at least 70% by weight of vinyl acetate, and a coupling agent. A method for the treatment of glass fibers, which comprises causing said sizing agent to be deposited on glass fibers and subjecting the glass fibers coated with said sizing agent to heat treatment.Type: GrantFiled: May 30, 1984Date of Patent: August 6, 1985Assignee: Nippon Oil & Fats Co., Ltd.Inventors: Takeshi Komai, Kazuo Matsuyama, Takuya Saigo
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Patent number: 4507432Abstract: In curing an unsaturated polyester resin in the presence of an organic peroxide added thereto, 4-methyl-2,4-diphenyl-pentene-1 is added to the mixture of the unsaturated polyester resin with the organic peroxide to enhance the curing properties.Type: GrantFiled: October 24, 1983Date of Patent: March 26, 1985Assignee: Nippon Oil & Fats Co., Ltd.Inventors: Shigeki Banno, Takeshi Komai
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Patent number: 4469862Abstract: An industrially highly valuable novel polymeric diacyl peroxide which is used as a polymerization initiator for free radical polymerization of vinyl monomer, and which is appreciably safe in production and handling, rapidly soluble in vinyl monomer with high solubility, and has exceedingly high catalyst efficiency in the free radical polymerization of vinyl monomer.Type: GrantFiled: June 27, 1983Date of Patent: September 4, 1984Assignee: Nippon Oil and Fats Co. Ltd.Inventors: Takeshi Komai, Toshihiro Izumi, Syuji Suyama
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Patent number: 4283512Abstract: A copolymer having peroxy bonds in the molecule thereof which is obtained by copolymerizing an diacyl type polymeric peroxide having ester bonds therein with one or more monomers having double bonds therein, may have a broad range of average molecular weight and a lot of peroxy bonds therein, and it may be used as an useful polymerization initiator in producing a block copolymer.Type: GrantFiled: November 27, 1979Date of Patent: August 11, 1981Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Masaru Matsushima, Takeshi Komai, Masaharu Nakayama
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Patent number: 4260692Abstract: When polystyrenes having peroxy bonds therein are charged into a polymerization system of methyl methacrylate series monomers, the said polystyrenes act as an opaquing agent and a polymerization initiator.The obtained opaque or translucent plate is splendid in optical and mechanical properties.Type: GrantFiled: October 29, 1979Date of Patent: April 7, 1981Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Takeshi Komai, Masaru Matsushima
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Patent number: 4238381Abstract: A non-aqueous liquid dispersion of polymers is obtained by a first step of copolymerizing one or more vinyl-type monomers with one or more polymerized peroxides, capable of further polymerization followed by a second step of copolymerizing the resulting copolymer having peroxy bonds therein with one or more vinyl-type monomers different than the one or ones used in the first copolymerization step, in an organic liquid which dissolves the polymers of the vinyl-type monomers of the first copolymerization but does not dissolve the polymers of the vinyl-type monomers used in the second copolymerization. The dispersion is splendid in dispersion stability and it is very useful as a thermosetting, film-type, coating composition.Type: GrantFiled: July 2, 1979Date of Patent: December 9, 1980Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Takeshi Komai, Masaru Matsushima
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Patent number: 4237257Abstract: Styrene-type monomers are polymerized, or mixtures of styrene-type monomers and other vinyl type monomers and copolymerized, at 50.degree.-120.degree. C. using 1-10 wt%, based on the weight of the monomers, of an organic peroxide polymerization initiator whose decomposition temperature at 10 hours of halflife is 40.degree. C. to 70.degree. C. whereby colorless low molecular weight styrene series polymers are obtained at a high yield, using polymerization apparatus of simple structure.Type: GrantFiled: July 7, 1978Date of Patent: December 2, 1980Assignee: Nippon Oil and Fats Co.Inventors: Yasuo Moriya, Takeshi Komai
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Patent number: 4169848Abstract: Polymeric diacyl peroxides containing ester groups in the molecules are insensitive to impact, friction and heat. Accordingly, they can be safely produced and handled. They are useful as industrial polymerization initiators and they dissolve promptly in vinyl-type monomers.Type: GrantFiled: May 24, 1978Date of Patent: October 2, 1979Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Takeshi Komai, Masaru Matsushima
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Patent number: 4137252Abstract: Dicyclododecyl peroxydicarbonate of the formula: ##STR1## is stable and can be stored at room temperature. It has a high solubility in organic solvents and good compatibility with unsaturated polyester resins.This compound is an improved polymerization initiator for free radical polymerizations of ethylenically unsaturated monomers, including copolymerization with monomers capable of copolymerizing therewith.This compound also is a catalyst for curing unsaturated polyester resin compositions.Type: GrantFiled: June 9, 1977Date of Patent: January 30, 1979Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Takeshi Komai, Kazuo Matsuyama, Kazuhiro Mizuno
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Patent number: 4119657Abstract: Peroxycarbonates having the following formula are copolymerizable with non-conjugated ethylenically unsaturated monomers and have good storage stability, ##STR1## in which R.sub.1 represents a hydrogen atom or a lower alkyl group having one to four carbon atoms, R.sub.2 and R.sub.3 represent lower alkyl groups having one to four carbon atoms, and R.sub.4 represents an alkyl group having one to 12 carbon atoms or a cyclo alkyl group having three to 12 carbon atoms.Type: GrantFiled: May 20, 1977Date of Patent: October 10, 1978Assignee: Nihon Oil and Fats Co., Ltd.Inventors: Takeshi Komai, Kazuo Matsuyama
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Patent number: 4093786Abstract: 1,1-BIS(TERT-BUTYLPEROXY)CYCLODODECANE DERIVED FROM CYCLODODECANONE AND TERT-BUTYLHYDROPEROXIDE HAS THE FORMULA ##STR1## and is a new, stable and solid compound particularly suitable as a crosslinking agent of polymeric materials.Type: GrantFiled: October 17, 1975Date of Patent: June 6, 1978Assignee: Nihon Yushi Co., Ltd.Inventors: Takeshi Komai, Masaru Matsushima, Takeshi Nakajima