Patents by Inventor Shinji Irifune
Shinji Irifune 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: 8039570Abstract: A solvent-free silicone composition for release paper, comprising a mixture prepared by i) subjecting the organopolysiloxane (I) which is composed of R13SiO1/2 units, SiO4/2 units and (HO)SiO3/2 units, and has an OH group content of from 0.02 to 0.1 mol/100 g, to a partial condensation reaction in an organic solvent in the presence of an alkaline catalyst and the organopolysiloxane (II) represented by the following formula (2), and ii) removing the organic solvent, said mixture having an OH group content of less than 0.02 mol/100 g. The composition forms a tight-release layer stable with time.Type: GrantFiled: October 13, 2006Date of Patent: October 18, 2011Assignee: Shin-Etsu Chemical Co., Ltd.Inventor: Shinji Irifune
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Publication number: 20110064882Abstract: A liquid silicone rubber coating composition exhibiting high adhesion for an airbag base fabric; a curtain airbag having a silicone rubber coating layer of the cured composition formed on at least one surface of the base fabric; and a method for producing such curtain airbag are provided. The composition comprises (A) an organopolysiloxane having at least 2 alkenyl groups bonded to the silicon atoms per molecule; (B) an organohydrogenpolysiloxane having at least 2 structural units represented by formula (1) per molecule, the structural units being linked by a non-siloxane structural unit not containing SiH group; (C) an addition catalyst; (E) an organosilicon compound having an epoxy group and an alkoxy group bonded to the silicon atom in the molecule; and (F) a titanium compound and/or a zirconium compound; and preferably (D) a fine powder silica having a specific surface area of at least 50 m2/g.Type: ApplicationFiled: September 10, 2010Publication date: March 17, 2011Inventors: Hidenori MIZUSHIMA, Masayuki Ikeno, Shinji Irifune
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Publication number: 20110015365Abstract: An organohydrogenpolysiloxane comprising at least two structural units of —(HR1SiO)a— wherein R1 is a monovalent hydrocarbon group, and a is an integer of 2-50, which are connected together via a SiH-free structural unit, is a novel crosslinking agent. A silicone composition comprising an alkenyl-containing organopolysiloxane, the organohydrogenpolysiloxane, and a catalyst is curable through addition reaction, adherent to plastic substrates, and useful for coating purposes.Type: ApplicationFiled: July 16, 2010Publication date: January 20, 2011Inventors: Shinji IRIFUNE, Akinari Itagaki
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Publication number: 20100305258Abstract: An addition-curable silicone emulsion that exhibits stable curability even with a small amount of platinum. The curable emulsion composition is composed of an emulsion A and an emulsion B described below which are mixed together at the time of use, wherein the ratio of [number-average particle size of dispersed particles in emulsion A]/[number-average particle size of dispersed particles in emulsion B] is within a range from 0.4 to 2.0. The emulsion A comprises a specific alkenyl group-containing organopolysiloxane, a specific organohydrogenpolysiloxane, a nonionic surfactant, a polyvinyl alcohol and water, wherein the number-average particle size of the dispersed particles is within a range from 300 to 1,000 nm. The emulsion B comprises a specific alkenyl group-containing organopolysiloxane, a platinum-based complex, a nonionic surfactant, a polyvinyl alcohol and water, wherein the number-average particle size of the dispersed particles is within a range from 300 to 1,000 nm.Type: ApplicationFiled: May 28, 2010Publication date: December 2, 2010Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Shinji Irifune, Tsutomu Nakajima, Kenji Yamamoto
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Publication number: 20100255417Abstract: A silicone composition comprising an epoxy-containing organopolysiloxane and a fluoroalkylfluorophosphoric acid salt as a photoacid generator is curable and safe.Type: ApplicationFiled: April 5, 2010Publication date: October 7, 2010Inventors: Kenji Tanaka, Shinji Irifune
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Publication number: 20090246540Abstract: An ultraviolet-curable silicone composition for a release paper including (A) 100 parts by mass of a specific organopolysiloxane having a polymerization degree of 8 to 20 and containing one epoxy group, and (C) an effective quantity of an onium salt photoinitiator. In a preferred embodiment, the composition further includes (B) 10 to 1,000 parts by mass of at least one specific organopolysiloxane containing a plurality of epoxy groups. In another preferred embodiment, the composition has a viscosity of not more than 100 mPa·s. The composition has a peel strength that exhibits a positive dependency on the peel speed when peeled from a hot-melt pressure-sensitive adhesive, and can therefore be used to produce a release paper capable of reducing peeling noise. Further, because the composition has a low viscosity, it exhibits excellent wetting of substrates having significant unevenness, even in a solventless form.Type: ApplicationFiled: March 30, 2009Publication date: October 1, 2009Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Shinji IRIFUNE, Akinari Itagaki
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Patent number: 7414096Abstract: A solvent-free silicone composition for release paper, comprising: (A) an organopolysiloxane represented by the following average compositional formula (1) (B) an organopolysiloxane represented by the following average compositional formula (2) (C) an organopolysiloxane having alkenyl groups only at its ends, represented by the following formula (3) and (D) an organohydrogenpolysiloxane represented by the following formula (4) wherein the component (A) is contained in an amount of from 10 to 30 wt %, the component (B) is contained in an amount of from 10 to 30 wt %, the component (C) is contained in an amount of from 40 to 80 wt %, based on a total weight of the components (A), (B) and (C), and the component (D) is contained in such an amount that a molar ratio of the hydrogen atom or atoms bonded to a silicon atom to a total of the alkenyl groups of the components (A), (B) and (C) ranges from 1.0 to 4.0.Type: GrantFiled: November 21, 2006Date of Patent: August 19, 2008Assignee: Shin-Etsu Chemical Co., Ltd.Inventor: Shinji Irifune
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Publication number: 20080176086Abstract: Provided is an ultraviolet-curable silicone composition including: (A) a non-terminal epoxy group-containing organopolysiloxane, (B) an organopolysiloxane containing epoxy groups at the two terminals of the molecular chain, and an onium salt photoinitiator capable of generating cations upon irradiation with ultraviolet light. The silicone composition of the present invention yields a cured film that exhibits excellent ultraviolet-curability and can be readily peeled from a pressure-sensitively adhesive material. In particular, the silicone composition yields a cured film that exhibits a tight release force relative to pressure-sensitive adhesives such as acrylic-based pressure-sensitive adhesives, and also exhibits minimal fluctuation in the release force.Type: ApplicationFiled: January 17, 2008Publication date: July 24, 2008Applicant: Shin-Etsu Chemical Co., Ltd.Inventor: Shinji IRIFUNE
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Patent number: 7374819Abstract: A release film comprising a plastic film substrate 3, a first layer 1 provided on at least one side of the substrate, and a second layer 2 provided on the first layer 1. The second layer 2 functions as a release layer and the first layer 1 as an adhesive layer to fix the second layer 2 on the substrate 3. The release film has a small peel force and can be prepared from solvent-free compositions.Type: GrantFiled: January 21, 2005Date of Patent: May 20, 2008Assignee: Shin-Etsu Chemical Co., Ltd.Inventor: Shinji Irifune
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Publication number: 20070129507Abstract: A solvent-free silicone composition for release paper, comprising: (A) an organopolysiloxane represented by the following average compositional formula (1) (B) an organopolysiloxane represented by the following average compositional formula (2) (C) an organopolysiloxane having alkenyl groups only at its ends, represented by the following formula (3) and (D) an organohydrogenpolysiloxane represented by the following formula (4) , wherein the component (A) is contained in an amount of from 10 to 30 wt %, the component (B) is contained in an amount of from 10 to 30 wt %, the component (C) is contained in an amount of from 40 to 80 wt %, based on a total weight of the components (A), (B) and (C), and the component (D) is contained in such an amount that a molar ratio of the hydrogen atom or atoms bonded to a silicon atom to a total of the alkenyl groups of the components (A), (B) and (C) ranges from 1.0 to 4.0.Type: ApplicationFiled: November 21, 2006Publication date: June 7, 2007Applicant: Shin-Etsu Chemical Co., Ltd.Inventor: Shinji Irifune
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Publication number: 20070087207Abstract: A solvent-free silicone composition for release paper, comprising a mixture prepared by i) subjecting the organopolysiloxane (I) which is composed of R13SiO1/2 units, SiO4/2 units and (HO)SiO3/2 units, and has an OH group content of from 0.02 to 0.1 mol/100 g, to a partial condensation reaction in an organic solvent in the presence of an alkaline catalyst and the organopolysiloxane (II) represented by the following formula (2), and ii) removing the organic solvent, said mixture having an OH group content of less than 0.02 mol/100 g. The composition forms a tight-release layer stable with time.Type: ApplicationFiled: October 13, 2006Publication date: April 19, 2007Inventor: Shinji Irifune
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Publication number: 20050164017Abstract: A release film comprising a plastic film substrate 3, a first layer 1 provided on at least one side of the substrate, and a second layer 2 provided on the first layer 1. The second layer 2 functions as a release layer and the first layer 1 as an adhesive layer to fix the second layer 2 on the substrate 3. The release film has a small peel force and can be prepared from solvent-free compositions.Type: ApplicationFiled: January 21, 2005Publication date: July 28, 2005Inventor: Shinji Irifune
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Patent number: 6875795Abstract: The invention provides a silicone composition curable by ultraviolet irradiation to give a cured film on a substrate surface exhibiting surface releasability against sticky surfaces. Advantageously, peeling works of a sticky surface from the cured surface of the inventive composition can be carried out with no or little generation of peeling noises which deteriolate the working environment. The composition comprises three different types of organopolysiloxane compounds of which the first is a so-called MQ siloxane, the second is a linear or cyclic diorganopolysiloxane having epoxy-containing substituents on the silicon atoms other than the chain terminal silicon atoms and the third is a straight or branched linear organopolysiloxane compound substituted by an epoxy-containing substituent on each of the chain terminal silicon atoms in a specified weight proportion of these three. The composition contains an onium salt compound as a photoreaction initiator to promote the ultraviolet-induced curing.Type: GrantFiled: June 16, 2003Date of Patent: April 5, 2005Assignee: Shin-Etsu Chemical Co., Ltd.Inventor: Shinji Irifune
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Patent number: 6794444Abstract: A silicone emulsion composition of the addition reaction curing type comprising a major proportion of an organopolysiloxane containing at least two alkenyl radicals and T units and having a viscosity of 5-100 mPa·s, a minor proportion of another organopolysiloxane containing at least two alkenyl radicals and having a 30% toluene diluted viscosity of 1,000-10,000 mPa·s, an organohydrogenpolysiloxane, a platinum radical metal catalyst, a surfactant, and water cures into a coating that adheres well to plastic film substrates. The cured coating exhibits release properties to pressure-sensitive adhesives and can be utilized as release film.Type: GrantFiled: December 26, 2002Date of Patent: September 21, 2004Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kenji Yamamoto, Shinji Irifune, Tutomu Nakajima, Masahiko Ogawa
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Patent number: 6696161Abstract: A silicone composition comprising a first organopolysiloxane containing T units, a second organopolysiloxane, an organohydrogenpolysiloxane, and a platinum catalyst cures into a coating that adheres well to plastic film substrates and even to polyester film substrates which are difficult for conventional solventless silicone compositions to adhere. The cured coating exhibits release properties to pressure-sensitive adhesives, and a film substrate coated with the cured silicone composition provides a release film.Type: GrantFiled: July 12, 2002Date of Patent: February 24, 2004Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Shinji Irifune, Masahiko Ogawa
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Publication number: 20030232900Abstract: The invention provides a silicone composition curable by ultraviolet irradiation to give a cured film on a substrate surface exhibiting surface releasability against sticky surfaces. Advantageously, peeling works of a sticky surface from the cured surface of the inventive composition can be carried out with no or little generation of peeling noises which deteriolate the working environment. The composition comprises three different types of organopolysiloxane compounds of which the first is a so-called MQ siloxane, the second is a linear or cyclic diorganopolysiloxane having epoxy-containing substituents on the silicon atoms other than the chain terminal silicon atoms and the third is a straight or branched linear organopolysiloxane compound substituted by an epoxy-containing substituent on each of the chain terminal silicon atoms in a specified weight proportion of these three. The composition contains an onium salt compound as a photoreaction initiator to promote the ultraviolet-induced curing.Type: ApplicationFiled: June 16, 2003Publication date: December 18, 2003Applicant: Shin-Etsu Chemical Co., Ltd.Inventor: Shinji Irifune
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Publication number: 20030134131Abstract: A silicone emulsion composition of the addition reaction curing type comprising a major proportion of an organopolysiloxane containing at least two alkenyl radicals and T units and having a viscosity of 5-100 mPa·s, a minor proportion of another organopolysiloxane containing at least two alkenyl radicals and having a 30% toluene diluted viscosity of 1,000-10,000 mPa·s, an organohydrogenpolysiloxane, a platinum radical metal catalyst, a surfactant, and water cures into a coating that adheres well to plastic film substrates. The cured coating exhibits release properties to pressure-sensitive adhesives and can be utilized as release film.Type: ApplicationFiled: December 26, 2002Publication date: July 17, 2003Inventors: Kenji Yamamoto, Shinji Irifune, Tutomu Nakajima, Masahiko Ogawa
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Patent number: 6573355Abstract: The invention discloses a method for the preparation of an organopolysiloxane having a branched molecular structure which comprises the steps of: (A) Mixing (A1) an organopolysiloxane represented by the average unit formula [R13SiO½]m[R1SiO{fraction (3/2)}]n[R1(R2O)SiO]q, in which R1 is a monovalent hydrocarbon group, R2 is a hydrogen atom, methyl group or ethyl group and the subscripts m, n and q are each 0 or a positive number with the proviso that (n+q)/m is from 0.6 to 1.5 and q/(m+n) is 0 or a positive number not exceeding 0.Type: GrantFiled: July 11, 2001Date of Patent: June 3, 2003Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Shinji Irifune, Masahiko Ogawa
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Publication number: 20030035965Abstract: A silicone composition comprising a first organopolysiloxane containing T units, a second organopolysiloxane, an organohydrogenpolysiloxane, and a platinum catalyst cures into a coating that adheres well to plastic film substrates and even to polyester film substrates which are difficult for conventional solventless silicone compositions to adhere. The cured coating exhibits release properties to pressure-sensitive adhesives, and a film substrate coated with the cured silicone composition provides a release film.Type: ApplicationFiled: July 12, 2002Publication date: February 20, 2003Inventors: Shinji Irifune, Masahiko Ogawa
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Publication number: 20020007007Abstract: The invention discloses a method for the preparation of an organopolysiloxane having a branched molecular structure which comprises the steps of:Type: ApplicationFiled: July 11, 2001Publication date: January 17, 2002Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Shinji Irifune, Masahiko Ogawa