Patents Assigned to Soken Chemical & Engineering Co., Ltd.
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Publication number: 20090018277Abstract: Disclosed is a resin composition composed of a heat-treated resin component (A) obtained by heating and mixing an aromatic imide resin or an aromatic imidazole resin with a carboxylic acid anhydride, and a silane compound (B) having at least one functional group selected from the group consisting of an epoxy group, an amino group, an amide group, a methoxy group, an isocyanate group, a carboxyl group, a mercapto group, a vinyl group, a (poly)sulfide group and a methacrylo group. This resin composition has excellent heat resistance of aromatic imide resins and aromatic imidazole resins while being remarkably improved in adhesion to various bases.Type: ApplicationFiled: May 1, 2006Publication date: January 15, 2009Applicant: SOKEN CHEMICAL & ENGINEERING CO., LTD.Inventors: Syuji Okamoto, Hiroto Matsumoto, Jun Izumi
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Publication number: 20080311394Abstract: A polymerizable composition containing at least (A) a (meth)acrylic monomer or a partially polymerized material thereof, which is adjusted so that the glass transition temperature of the whole polymer component after polymerization comes to be 20° C. or less, (B) a thermally conductive inorganic filler, (C) a photopolymerization initiator and (D) a thermal polymerization initiator is disclosed. Further, a production method for a (meth)acrylic thermally conductive sheet which is characterized by applying the photopolymerizable composition in a thickness of from 0.5 mm to 10 mm on a support, laminating a protective sheet on the surface of the thus-applied layer, and then subjecting the resultant laminate to light irradiation is disclosed. In the polymerizable composition according to the invention, the (meth)acrylic monomer can be polymerized by light irradiation for a short time even without providing heating, achieving a sufficiently high polymerization ratio.Type: ApplicationFiled: August 25, 2008Publication date: December 18, 2008Applicant: SOKEN CHEMICAL & ENGINEERING CO., LTD.Inventors: Jun IZUMI, Masayuki Takada
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Publication number: 20080277054Abstract: A polymerizable composition which contains a component (A): a (meth)acrylic monomer, a component (B): a (meth)acrylic polymer having at least one functional group capable of undergoing a cross-linking reaction in its molecule, a component (C): a (meth) acrylic oligomer having at one terminal of its molecule a functional group capable of undergoing a cross-linking reaction, a component (D): a cross-linking agent having a functional group capable of undergoing a cross-linking reaction, a compound (E): a photopolymerization initiator and/or a thermal polymerization initiator, and a component (F): a thermally conductive filler, is disclosed. Further, a (meth)acrylic thermally conductive sheet having a pressure-sensitive adhesive layer prepared by polymerizing and cross-linking the polymerizable composition on a support is disclosed.Type: ApplicationFiled: May 11, 2006Publication date: November 13, 2008Applicant: SOKEN CHEMICAL & ENGINEERING CO., LTD.Inventors: IZUMI Jun, TAKADA Masayuki
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Publication number: 20080146732Abstract: A process for producing an emulsion pressure-sensitive adhesive comprises (co)polymerizing a main monomer in the presence of a protective colloid, the protective colloid being an acrylic copolymer comprising (A-1) at least one hydrophilic monomer selected from the group consisting of acrylamide, methacrylamide, hydroxyethyl acrylate and hydroxyethyl methacrylate and (B-1) an alkyl (meth)acrylate that is copolymerizable with the hydrophilic monomer (A-1) and whose alkyl group has 4 to 18 carbon atoms, or (A-2) a hydrophilic monomer being acrylic acid and/or methacrylic acid and (B-2) an alkyl (meth)acrylate that is copolymerizable with the hydrophilic monomer (A-2) and whose alkyl group has 4 to 9 carbon atoms; the hydrophilic monomer and the alkyl (meth)acrylate being copolymerized in a weight ratio in the range of 40-70:60-30; the acrylic copolymer having a weight-average molecular weight in the range of 500 to 50000.Type: ApplicationFiled: February 11, 2008Publication date: June 19, 2008Applicant: SOKEN CHEMICAL & ENGINEERING CO., LTD.Inventor: Kiyokuni Takashima
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Patent number: 7378473Abstract: Monodisperse colored spherical particles each having two separated color regions of two hues, that is, two-colored spherical particles, useful, for example, for displays of characters, graphics, images and the like, the two hues being for reverse display in terms of electricity and magnetism from the viewpoint of good suitability for display are provided. In the production process and the apparatus for producing the colored spherical polymer particles, microchannels are utilized including a first microchannel through which a colored continuous phase comprising a color dye/pigment dispersed in a fluid dispersing medium containing a polymerizable resin component and having colored phases of different hues is transferred, and a second microchannel through which a spheroidizing disperse phase flows.Type: GrantFiled: December 5, 2003Date of Patent: May 27, 2008Assignees: Soken Chemical & Engineering Co., Ltd.Inventors: Toru Torii, Toshiro Higuchi, Takasi Nisisako, Youichi Takizawa, Takanori Takahashi
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Patent number: 7375161Abstract: A process for producing an emulsion pressure-sensitive adhesive comprises (co)polymerizing a main monomer in the presence of a protective colloid, the protective colloid being an acrylic copolymer comprising (A-1) at least one hydrophilic monomer selected from the group consisting of acrylamide, methacrylamide, hydroxyethyl acrylate and hydroxyethyl methacrylate and (B-1) an alkyl (meth)acrylate that is copolymerizable with the hydrophilic monomer (A-1) and whose alkyl group has 4 to 18 carbon atoms, or (A-2) a hydrophilic monomer being acrylic acid and/or methacrylic acid and (B-2) an alkyl (meth)acrylate that is copolymerizable with the hydrophilic monomer (A-2) and whose alkyl group has 4 to 9 carbon atoms; the hydrophilic monomer and the alkyl (meth)acrylate being copolymerized in a weight ratio in the range of 40-70:60-30; the acrylic copolymer having a weight-average molecular weight in the range of 500 to 50000.Type: GrantFiled: February 27, 2004Date of Patent: May 20, 2008Assignee: Soken Chemical & Engineering Co., Ltd.Inventor: Kiyokuni Takashima
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Publication number: 20080033109Abstract: An adhesive composition for a polarizing plate which has excellent optical properties and durability, is capable of relaxing stress caused by dimensional changes of the polarizing plate or the like and is capable of suppressing light leakage and ununiformity of color. A polarizing plate having an adhesive layer composed of the adhesive composition is also disclosed. The adhesive composition for a polarizing plate includes an acrylic copolymer (A), which contains, as monomer components, (a1) a (meth)acrylic ester in an amount of 10 to 79.9% by weight, (a2) a benzene ring-containing compound in an amount of 20 to 80% by weight and (a3) a functional group-containing compound in an amount of 0.1 to 10% by weight and has a benzene ring content of not less than 10% by weight and a weight-average molecular weight of 800,000 to 2,000,000, a crosslinking agent (B) in an amount 0.01 to 0.3 part by weight, and a silane coupling agent (C) in an amount of 0.01 to 0.Type: ApplicationFiled: July 22, 2005Publication date: February 7, 2008Applicant: SOKEN CHEMICAL & ENGINEERING CO., LTD.Inventors: Koji Tomita, Akira Nomura
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Publication number: 20070261785Abstract: A polymerizable composition which contains a component (A): a (meth)acrylic monomer, a component (B): a (meth)acrylic polymer having at least one functional group capable of undergoing a cross-linking reaction in its molecule, a component (C): a (meth)acrylic oligomer having at one terminal of its molecule a functional group capable of undergoing a cross-linking reaction, a component (D): a cross-linking agent having a functional group capable of undergoing a cross-linking reaction, a compound (E): a photopolymerization initiator and/or a thermal polymerization initiator, and a component (F): a thermally conductive filler, is disclosed. Further, a (meth)acrylic thermally conductive sheet having a pressure-sensitive adhesive layer prepared by polymerizing and cross-linking the polymerizable composition on a support is disclosed.Type: ApplicationFiled: May 11, 2006Publication date: November 15, 2007Applicant: SOKEN CHEMICAL & ENGINEERING CO., LTD.Inventors: Jun Izumi, Masayuki Takada
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Patent number: 7169867Abstract: A catalyst for bulk polymerization of a polymerizable unsaturated compound of the invention comprises a compound having at least one thiol group and a secondary hydroxyl group and represented by the following formula (I): wherein R1 to R5 are each a hydrogen atom or an alkyl group, and R6 is a hydroxyl group, an alkyl group or the like. Also a process for bulk polymerization of the invention comprises polymerizing a polymerizable unsaturated compound in an inert gas atmosphere substantially in the absence of a solvent using, as a catalyst, a compound having at least one thiol group and a secondary hydroxyl group and represented by the above formula (I). According to the catalyst or the process of the invention, bulk polymerization can be carried out in one-component catalyst system in a high yield without suffering a runaway reaction.Type: GrantFiled: February 28, 2005Date of Patent: January 30, 2007Assignee: Soken Chemical & Engineering Co., Ltd.Inventors: Syuji Okamoto, Hiroshi Ueno
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Publication number: 20060263619Abstract: A polymerizable composition containing at least (A) a (meth)acrylic monomer or a partially polymerized material thereof, which is adjusted so that the glass transition temperature of the whole polymer component after polymerization comes to be 20° C. or less, (B) a thermally conductive inorganic filler, (C) a photopolymerization initiator and (D) a thermal polymerization initiator is disclosed. Further, a production method for a (meth)acrylic thermally conductive sheet which is characterized by applying the photopolymerizable composition in a thickness of from 0.5 mm to 10 mm on a support, laminating a protective sheet on the surface of the thus-applied layer, and then subjecting the resultant laminate to light irradiation is disclosed. In the polymerizable composition according to the invention, the (meth)acrylic monomer can be polymerized by light irradiation for a short time even without providing heating, achieving a sufficiently high polymerization ratio.Type: ApplicationFiled: May 12, 2006Publication date: November 23, 2006Applicant: SOKEN CHEMICAL & ENGINEERING CO., LTD.Inventors: Jun Izumi, Masayuki Takada
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Publication number: 20060199915Abstract: A modified cycloolefin copolymer is obtained by chemical modification of a base polymer being a cycloolefin copolymer with ethylene chains, through addition of a modifier compound having a functional group and a hydrogen-donating group or having a functional group and an alkyl halide group, wherein: the functional group is added at a stoichiometric percentage of 20 to 90% of all the replaceable hydrogen atoms in ethylene chains and main-chain cycloolefin chains of the base polymer; and the distribution degree of the functional group-modified cycloolefin copolymer in the base polymer is in the range of 0.01 to 0.1 as expressed in distribution correlation coefficient (DR) defined by the relation (1) below. (DR)=[(RI)?(UV)]2 . . .Type: ApplicationFiled: December 24, 2003Publication date: September 7, 2006Applicant: SOKEN CHEMICAL & ENGINEERING CO., LTD.Inventors: Jun Izumi, Syuji Okamoto
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Publication number: 20060194912Abstract: A process for producing an emulsion pressure-sensitive adhesive comprises (co)polymerizing a main monomer in the presence of a protective colloid, the protective colloid being an acrylic copolymer comprising (A-1) at least one hydrophilic monomer selected from the group consisting of acrylamide, methacrylamide, hydroxyethyl acrylate and hydroxyethyl methacrylate and (B-1) an alkyl (meth)acrylate that is copolymerizable with the hydrophilic monomer (A-1) and whose alkyl group has 4 to 18 carbon atoms, or (A-2) a hydrophilic monomer being acrylic acid and/or methacrylic acid and (B-2) an alkyl (meth)acrylate that is copolymerizable with the hydrophilic monomer (A-2) and whose alkyl group has 4 to 9 carbon atoms; the hydrophilic monomer and the alkyl (meth)acrylate being copolymerized in a weight ratio in the range of 40-70:60-30; the acrylic copolymer having a weight-average molecular weight in the range of 500 to 50000.Type: ApplicationFiled: February 27, 2004Publication date: August 31, 2006Applicant: Soken Chemical & Engineering Co., Ltd.Inventor: Kiyokuni Takashima
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Publication number: 20060177651Abstract: It is a pressure-sensitive adhesive for a surface-protective film which comprises the following components (A) and (B): (A) a (meth)acrylic ester copolymer obtained by copolymerizing at least the following components (a1) and (a2) (a1) 80 to 99% by mass of an alkyl (meth)acrylate in which the alkyl group has up to 12 carbon atoms; and (a2) 1 to 10% by mass of 4-hydroxybutyl acrylate or 4-hydroxybutyl methacrylate; and (B) an isocyanate crosslinking agent having a functionality of 3 or higher, the amount of the component (B) being 1 to 5 parts by weight per 100 parts by weight of the component (A). The pressure-sensitive adhesive has a gel fraction of 90% by mass or higher, a peel force as measured at a peel rate of 300 mm/min of 20 gf/inch or lower, and a peel force as measured at a peel rate of 2,000 mm/min of 50 gf/inch or lower.Type: ApplicationFiled: May 10, 2004Publication date: August 10, 2006Applicant: SOKEN CHEMICAL & ENGINEERING CO., LTD.Inventor: Koji Tomita
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Patent number: 7015295Abstract: A method for bulk polymerization of monomers having a polymerizable unsaturated bond consisting mainly of an alkyl acrylate, which comprises adding a polymerization initiator having a 10 hours half-life temperature of 41.0° C. or below to the monomers in an amount of 0.0001 to 0.5 parts by weight based on 100 parts by weight of the monomers to initiate polymerization of the monomers, allowing after the reaction initiation the temperature of the reaction mixture to reach a maximum of 100 to 140° C. by the self-exotherm of the reaction system due to the consumption of the polymerization initiator, and thereby polymerizing 15 to 50% by weight of the monomers used.Type: GrantFiled: October 27, 2000Date of Patent: March 21, 2006Assignee: Soken Chemical & Engineering Co., Ltd.Inventors: Youichi Takizawa, Tetsuya Yoshida
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Publication number: 20060014894Abstract: Monodisperse colored spherical particles each having two separated color regions of two hues, that is, two-colored spherical particles, useful, for example, for displays of characters, graphics, images and the like, the two hues being for reverse display in terms of electricity and magnetism from the viewpoint of good suitability for display are provided. In the production process and the apparatus for producing the colored spherical polymer particles, microchannels are utilized including a first microchannel through which a colored continuous phase comprising a color dye/pigment dispersed in a fluid dispersing medium containing a polymerizable resin component and having colored phases of different hues is transferred, and a second microchannel through which a spheroidizing disperse phase flows.Type: ApplicationFiled: December 5, 2003Publication date: January 19, 2006Applicants: Soken Chemical & Engineering Co., Ltd.Inventors: Toru Torii, Toshiro Higuchi, Takasi Nisisako, Youichi Takizawa, Takanori Takahashi
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Patent number: 6861486Abstract: A catalyst for bulk polymerization comprising an organometallic compound represented by specified formula and a thiol is provided. The specified organometallic compound is a metallocene compound such as titanocene or zirconocene. The use of this bulk polymerization catalyst comprising a metallocene compound and a thiol enables stable bulk polymerization of a polymerizable unsaturated compound such as an acrylic monomer, the reaction control of which has been difficult in the bulk polymerization of the prior art.Type: GrantFiled: September 26, 2002Date of Patent: March 1, 2005Assignee: Soken Chemical & Engineering Co., Ltd.Inventors: Syuji Okamoto, Hiroshi Ueno
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Patent number: 6806331Abstract: A catalyst for bulk polymerization of a polymerizable unsaturated compound comprises a compound having at least one thiol group and a secondary hydroxyl group and represented by the following formula (I): wherein R1 to R5 are each a hydrogen atom or an alkyl group, and R6 is a hydroxyl group, an alkyl group or the like. Also a process for bulk polymerization of the invention comprises polymerizing a polymerizable unsaturated compound in an inert gas atmosphere substantially in the absence of a solvent using, as a catalyst, a compound having at least one thiol group and a secondary hydroxyl group and represented by the above formula (I). According to the catalyst or the process, bulk polymerization can be carried out in one-component catalyst system in a high yield without suffering a runaway reaction.Type: GrantFiled: April 20, 2000Date of Patent: October 19, 2004Assignee: Soken Chemical and Engineering Co., Ltd.Inventors: Syuji Okamoto, Hiroshi Ueno
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Patent number: 6783850Abstract: An acrylic pressure sensitive adhesive composition comprising 5 to 75 parts by weight of an adherent polymer (a) comprising (meth)acrylic ester component units as principal structural units and having a weight average molecular weight of 50,000 or more; 5 to 40 parts by weight of a tackifier resin (b) comprising (meth)acrylic ester component units as principal structural units and having a weight average molecular weight of 20,000 or less; and 20 to 90 parts by weight of monomers (c) whose principal component is a (meth)acrylic ester, wherein substantially no solvent is contained is provided. Further, a pressure sensitive adhesive tape having a pressure sensitive adhesive layer superimposed on a support surface is provided by coating the support surface with the above acrylic pressure sensitive adhesive composition, which contain a partial polymerizate, and carrying out a polymerization reaction on the support surface.Type: GrantFiled: June 21, 2002Date of Patent: August 31, 2004Assignee: Soken Chemical & Engineering Co., Ltd.Inventors: Youichi Takizawa, Mitsuhiko Nakazawa
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Publication number: 20030023012Abstract: A catalyst for bulk polymerization comprising an organometallic compound represented by specified formula and a thiol is provided. The specified organometallic compound is a metallocene compound such as titanocene or zirconocene. The use of this bulk polymerization catalyst comprising a metallocene compound and a thiol enables stable bulk polymerization of a polymerizable unsaturated compound such as an acrylic monomer, the reaction control of which has been difficult in the bulk polymerization of the prior art.Type: ApplicationFiled: September 26, 2002Publication date: January 30, 2003Applicant: Soken Chemical & Engineering Co., Ltd.Inventors: Syuji Okamoto, Hiroshi Ueno
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Patent number: 6506834Abstract: A highly water resistant tackifier resin comprising an acrylic (co)polymer incorporating therein while taking up at least part of a tackifying component as a raw material on or around seed particles of 0.05 to 15 &mgr;m in average particle size having polar groups on their surfaces. The above tackifier resin can be produced by a process comprising the steps of: dispersing a tackifying component as a raw material, an oil-soluble peroxide or oil-soluble azo initiator and an acrylic monomer in an aqueous medium in which seed particles of 0.05 to 15 &mgr;m in average particle size having polar groups at their surfaces are dispersed; and polymerizing the acrylic monomer while at least part of the tackifying component is incorporated in the acrylic (co)polymer on or around the seed particles so that the seed particles grow.Type: GrantFiled: January 10, 2001Date of Patent: January 14, 2003Assignee: Soken Chemical & Engineering Co., Ltd.Inventor: Kiyokuni Takashima