Patents by Inventor Mitsuyoshi Shirai
Mitsuyoshi Shirai 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: 8901242Abstract: [Problem] To provide a composite film having light-curing property and weather resistance. [Means for solving] A composite film is one that comprises at least a urethane polymer, wherein both an initial b* value of the composite film measured by a spectrocolorimeter (value at an angle of 15 degrees) and a b* value after performing an accelerated weathering test for 120 hours (value at an angle of 15 degrees) are 4.0 or less, and a non-volatile component after heating the composite film at 130° C. for two hours is 96% or more.Type: GrantFiled: April 8, 2009Date of Patent: December 2, 2014Assignee: Nitto Denko CorporationInventors: Hidenori Suzuki, Masanori Uesugi, Makoto Kai, Mitsuyoshi Shirai
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Publication number: 20140178682Abstract: The present invention provides a multi-layered PSA article having higher interlayer adhesive strength. The multi-layered PSA article of the present invention comprises a PSA layer (A) formed from a PSA composition (a) comprising as a primary component an acrylic polymer (a) obtained by polymerizing a monomer composition (a), a PSA layer (B) formed from a PSA composition (b) comprising as a primary component an acrylic polymer (b) obtained by polymerizing a monomer composition (b), and an intermediate layer (C) placed between the PSA layer (A) and the PSA layer (B), wherein the acrylic polymer (a) and the acrylic polymer (b) comprise an acidic group, and the intermediate layer (C) is formed from an intermediate layer composition (c) comprising a polymer (c) having a primary to tertiary amino group.Type: ApplicationFiled: May 29, 2012Publication date: June 26, 2014Applicant: NITTO DENKO CORPORATIONInventors: Mitsuyoshi Shirai, Eriko Funatsu, Hidetoshi Maikawa
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Publication number: 20140127503Abstract: The present invention provides a multi-layered PSA article having higher interlayer adhesive strength. The multi-layered PSA article of the present invention comprises a PSA layer (A) formed from a PSA composition (a) comprising an acrylic polymer (a) as a primary component, a PSA layer (B) formed from a PSA composition (b) comprising an acrylic polymer (b) as a primary component, and an intermediate layer (C) placed between the PSA layer (A) and the PSA layer (B), wherein the PSA composition (a) and the PSA composition (b) individually further comprise a compound having per molecule two or more functional groups that are capable of reacting with active hydrogen, and the intermediate layer (C) is formed from an intermediate layer composition (c) comprising a polymer (c) obtained by polymerizing a monomer composition (c) comprising a monomer having an active hydrogen.Type: ApplicationFiled: May 29, 2012Publication date: May 8, 2014Applicant: NITTO DENKO CORPORATIONInventors: Mitsuyoshi Shirai, Eriko Funatsu, Hidetoshi Maikawa
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Patent number: 8545978Abstract: To provide a composite film having low-temperature flexibility. The composite film including an acrylic polymer and a urethane polymer, in which the acrylic polymer includes an acryl component containing at least an acrylic acid-based monomer and a monofunctional acrylic monomer whose homopolymer has a glass transition temperature (Tg) of 273 K or more; the content of said acrylic acid-based monomer in said composite film is from 0.5 to 15 wt %; the glass transition temperature (Tg ac) of the acrylic polymer is 273 K or more; the glass transition temperature (Tg ur) of the urethane polymer is 273 K or less; and the glass transition temperature (Tg) of the composite film is 269 K or less.Type: GrantFiled: September 2, 2009Date of Patent: October 1, 2013Assignee: Nitto Denko CorporationInventors: Hidenori Suzuki, Masanori Uesugi, Makoto Kai, Mitsuyoshi Shirai
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Patent number: 8530046Abstract: To provide an adhesive sheet for protecting coating films which is excellent in the adhesion between a coating layer and a composite film, and has weather resistance. The adhesive sheet for protecting coating films is one comprising a base layer and an adhesive layer, and the base layer has a coating layer produced by using the fluoroethylene vinyl ether alternating copolymer having a specific structure on one surface of a composite film containing an acrylic polymer and a urethane polymer. It is preferable that the coating layer is cross-linked with a composite film and has cross-linked points.Type: GrantFiled: May 14, 2009Date of Patent: September 10, 2013Assignee: Nitto Denko CorporationInventors: Makoto Kai, Kenichi Shibata, Mitsuyoshi Shirai, Masanori Uesugi, Hidenori Suzuki
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Patent number: 8399091Abstract: An adhesive sheet is provided in which properties that cause corrosion of a non-contacting metal are inhibited. The adhesive sheet is provided with a pressure-sensitive adhesive layer formed from an aqueous dispersion type adhesive composition. The pressure-sensitive adhesive composition contains an aqueous dispersion type acrylic polymer synthesized using a chain transfer agent that does not have sulfur as a composite element thereof. The amount of sulfur-containing gas (as SO42?) released from the pressure-sensitive adhesive sheet in the case of heating for 1 hour at 85° C. is 0.043 ?g/1 cm2 or less, adhesive strength on an ABS sheet is 10 N/20 mm or more, and holding time as determined in an 80° C. cohesive strength test is 1 hour or more.Type: GrantFiled: June 1, 2010Date of Patent: March 19, 2013Assignee: Nitto Denko CorporationInventors: Kenichi Yamamoto, Toshihide Suzuki, Shouhei Wada, Mitsuyoshi Shirai, Akiko Takahashi
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Publication number: 20130052460Abstract: A primer composition contains an acrylic polymer obtained by polymerizing a monomer component which contains, as the primary component, an alkyl (meth)acrylate containing an alkyl group having 1 to 30 carbon atoms, and particles.Type: ApplicationFiled: May 17, 2011Publication date: February 28, 2013Applicant: NITTO DENKO CORPORATIONInventors: Azusa Iseki, Tomonari Naito, Asami Kubo, Mitsuyoshi Shirai
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Publication number: 20120231267Abstract: A pressure-sensitive adhesive sheet according to the present invention is a double-sided pressure-sensitive adhesive sheet having a plastic substrate and pressure-sensitive adhesive layers provided on each side thereof. The pressure-sensitive adhesive layers are formed from a water-dispersed pressure-sensitive adhesive composition having an acrylic polymer dispersed in an aqueous solvent. An anchor layer formed from an anchor composition containing polyester-polyurethane dissolved in an organic solvent is provided between at least a first side of the substrate and the pressure-sensitive adhesive layer.Type: ApplicationFiled: March 8, 2012Publication date: September 13, 2012Applicant: NITTO DENKO CORPORATIONInventors: Hironao OOTAKE, Akiko TAKAHASHI, Mitsuyoshi SHIRAI
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Patent number: 8168035Abstract: Provided is an adhesive method of pressure-sensitive adhesive sheet for vehicle coatings, giving a pressure-sensitive adhesive sheet highly adhesive even to a coating surface easily causing the low adhesion by bleed-out of leveling agent or the like. The adhesive method of pressure-sensitive adhesive sheet for vehicle coatings according to the present invention is characterized in that the difference (absolute value) between the solubility parameter (SP value) of a pressure-sensitive adhesive layer (X) formed on the side of the pressure-sensitive adhesive sheet in contact with the vehicle coating and the solubility parameter (SP value) of the surface control agent contained in the vehicle coating is 0.6 (cal/cm3)1/2 or less.Type: GrantFiled: April 22, 2008Date of Patent: May 1, 2012Assignee: Nitto Denko CorporationInventors: Masanori Uesugi, Mitsuyoshi Shirai, Takashi Kondou, Masayuki Okamoto, Masahito Niwa
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Publication number: 20120021208Abstract: To provide a composite film having low-temperature flexibility. The composite film is a composite film including an acrylic polymer and a urethane polymer, in which the acrylic polymer includes an acryl component containing at least an acrylic acid-based monomer and a monofunctional acrylic monomer whose homopolymer has a glass transition temperature (Tg) of 273 K or more; the content of the acrylic acid-based monomer in the composite film is from 0.5 to 15 wt %; the glass transition temperature (Tg ac) of the acrylic polymer is 273 K or more; the glass transition temperature (Tg ur) of the urethane polymer is 273 K or less; and the glass transition temperature (Tg) of the composite film is 269 K or less.Type: ApplicationFiled: September 2, 2009Publication date: January 26, 2012Applicant: NITTO DENKO CORPORATIONInventors: Hidenori Suzuki, Masanori Uesugi, Makoto Kai, Mitsuyoshi Shirai
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Publication number: 20110183093Abstract: The present invention provides a pressure-sensitive adhesive (PSA) sheet which is formed using a non-toluene solvent-based acrylic PSA composition, and which minimizes corrosion of metals not in contact with the PSA sheet. PSA sheet 1 has PSA layers 21, 22 formed from a solvent-based PSA composition. The PSA composition includes, within an organic solvent that is substantially free of toluene substances, an acrylic polymer synthesized in presence of a sulfur-containing chain transfer agent. Moreover, in a gas generation test whereby PSA sheet 1 is heated at 85° C. for one hour, the emission of sulfur-containing gas is 0.043 ?g or less per 1 cm2 surface area of PSA sheet 1, when converted to SO42?.Type: ApplicationFiled: January 20, 2011Publication date: July 28, 2011Applicant: NITTO DENKO CORPORATIONInventors: Shouhei WADA, Akiko TAKAHASHI, Mitsuyoshi SHIRAI, Toshihide SUZUKI, Kenichi YAMAMOTO
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Publication number: 20110151220Abstract: A double-sided pressure-sensitive adhesive (PSA) sheet 11 has, on each side of a plastic film substrate 1, a PSA layer 3 provided through an undercoat layer 2 containing a compound having an oxazoline group. The PSA layer 3 is formed from a water-dispersed PSA composition. This PSA composition contains an acrylic polymer synthesized by emulsion polymerization of a monomer raw material containing an alkyl(meth)acrylate and a carboxyl group-containing monomer, and a water-dispersed tackifier at a mass ratio of 100:5 to 100 based on solid content. The toluene emission when this PSA sheet is kept at 80° C. for 30 minutes is 20 ?g or less per gram of the sheet.Type: ApplicationFiled: December 20, 2010Publication date: June 23, 2011Applicant: NITTO DENKO CORPORATIONInventors: Mitsuyoshi SHIRAI, Akiko TAKAHASHI, Shouhei WADA, Mutsumi KOBAYASHI
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Publication number: 20110070430Abstract: A double-sided pressure-sensitive adhesive (PSA) sheet having a plastic film as a substrate is provided, with the property of corroding a metal not in contact therewith being suppressed. This PSA sheet has a PSA layer that uses a water-dispersed acrylic PSA composition on each side of the plastic film substrate. The PSA composition contains a water-dispersed acrylic polymer synthesized using a sulfur-containing chain transfer agent. The PSA sheet has the emission of sulfur-containing gas of 0.043 ?g or less per 1 cm2 surface area of the PSA sheet, when converted to SO42?, in a gas generation test under which the PSA sheet is heated at 85° C. for one hour.Type: ApplicationFiled: September 23, 2010Publication date: March 24, 2011Applicant: NITTO DENKO CORPORATIONInventors: Mitsuyoshi SHIRAI, Akiko TAKAHASHI, Shouhei WADA, Toshihide SUZUKI, Kenichi YAMAMOTO, Tatsuya TSUKAGOSHI
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Publication number: 20110064946Abstract: [Problem] To provide an adhesive sheet for protecting coating films which is excellent in the adhesion between a coating layer and a composite film, and has weather resistance. [Means for solving] The adhesive sheet for protecting coating films is one comprising a base layer and an adhesive layer, and the base layer has a coating layer produced by using the fluoroethylene vinyl ether alternating copolymer having a specific structure on one surface of a composite film containing an acrylic polymer and a urethane polymer. It is preferable that the coating layer is cross-linked with a composite film and has cross-linked points.Type: ApplicationFiled: May 14, 2009Publication date: March 17, 2011Applicant: Nitto Denko CorporationInventors: Makoto Kai, Kenichi Shibata, Mitsuyoshi Shirai, Masanori Uesugi, Hidenori Suzuki
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Publication number: 20110064900Abstract: [Problem] To provide an adhesive sheet for protecting coating films having excellent flexibility. [Means for Solving] The adhesive sheet for protecting coating films comprises an adhesive layer and a base layer provided with a composite film containing at least a urethane polymer, and the adhesive sheet has a 10% modulus at 20° C. of 35 N/cm or less, and a 100% modulus at 20° C. of 8 N/cm or more. A breaking strength of the adhesive sheet for protecting coating films is preferably 40 N/cm or more.Type: ApplicationFiled: April 8, 2009Publication date: March 17, 2011Applicant: NITTO DENKO CORPORATIONInventors: Masanori Uesugi, Mitsuyoshi Shirai, Makoto Kai, Hidenori Suzuki, Eiichi Imoto
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Publication number: 20100310866Abstract: An adhesive sheet is provided in which properties that cause corrosion of a non-contacting metal are inhibited. The adhesive sheet is provided with a pressure-sensitive adhesive layer formed from an aqueous dispersion type adhesive composition. The pressure-sensitive adhesive composition contains an aqueous dispersion type acrylic polymer synthesized using a chain transfer agent that does not have sulfur as a composite element thereof. The amount of sulfur-containing gas (as SO42?) released from the pressure-sensitive adhesive sheet in the case of heating for 1 hour at 85° C. is 0.043 ?g/1 cm2 or less, adhesive strength on an ABS sheet is 10 N/20 mm or more, and holding time as determined in an 80° C. cohesive strength test is 1 hour or more.Type: ApplicationFiled: June 1, 2010Publication date: December 9, 2010Applicant: NITTO DENKO CORPORATIONInventors: Kenichi YAMAMOTO, Toshihide SUZUKI, Shouhei WADA, Mitsuyoshi SHIRAI, Akiko TAKAHASHI
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Publication number: 20100255297Abstract: The present invention provides a pressure-sensitive adhesive sheet minimizing the corrosion of metals not in contact with the PSA sheet. PSA sheet 54 has a pressure-sensitive adhesive layer formed from an aqueous pressure-sensitive adhesive composition comprising an adhesive ingredient and a preservative in an aqueous medium. In a metal corrosion test carried out by placing 1 g of the PSA sheet 54 and a silver plate 56 so as not to be in mutual contact in a 50 mL vessel 52 and then closing and holding the vessel 52 at 85° C. for one week, the PSA sheet 54 does not corrode the silver plate 56.Type: ApplicationFiled: April 5, 2010Publication date: October 7, 2010Applicant: NITTO DENKO CORPORATIONInventors: Shouhei WADA, Mitsuyoshi SHIRAI, Toshihide SUZUKI, Kenichi YAMAMOTO, Akiko TAKAHASHI
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Publication number: 20100196704Abstract: [Problem] To provide a composite film having light-curing property and weather resistance. [Means for solving] A composite film is one that comprises at least a urethane polymer, wherein both an initial b* value of the composite film measured by a spectrocolorimeter (value at an angle of 15 degrees) and a b* value after performing an accelerated weathering test for 120 hours (value at an angle of 15 degrees) are 4.0 or less, and a non-volatile component after heating the composite film at 130° C. for two hours is 96% or more.Type: ApplicationFiled: April 8, 2009Publication date: August 5, 2010Applicant: Nitto Denko CorporationInventors: Hidenori Suzuki, Masanori Uesugi, Makoto Kai, Mitsuyoshi Shirai
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Publication number: 20100178500Abstract: There is provided a pressure-sensitive adhesive (PSA) sheet with the property of corroding a metal not in contact therewith suppressed. This PSA sheet is provided with a PSA layer formed from a water-dispersed PSA composition. The PSA composition contains a water-dispersed acrylic polymer synthesized using a sulfur-containing chain transfer agent. Moreover, in a gas generation test whereby the PSA sheet is heated at 85° C. for one hour, the emission of sulfur-containing gas is 0.043 ?g or less per 1 cm2 surface area of the sheet, when converted to SO42?.Type: ApplicationFiled: January 7, 2010Publication date: July 15, 2010Applicant: NITTO DENKO CORPORATIONInventors: Shouhei WADA, Mitsuyoshi SHIRAI, Akiko TAKAHASHI, Toshihide SUZUKI, Kenichi YAMAMOTO
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Publication number: 20100136321Abstract: Disclosed is a pressure-sensitive adhesive sheet to be applied to a surface-conditioner-bearing surface of a vehicle coating. The sheet includes an acrylic pressure-sensitive adhesive layer (Y) as a pressure-sensitive adhesive layer to be in contact with the surface of the vehicle coating. The layer (Y) has been polymerized from an acrylic pressure-sensitive adhesive composition through the application of active energy rays, the composition includes a vinyl monomer mainly containing an alkyl (meth)acrylate (a1) whose alkyl moiety having 2 to 14 carbon atoms, or a prepolymer thereof (a); an active-energy-ray-activatable polymerization initiator (b); a multifunctional (meth)acrylate (c); and a (meth)acrylate oligomer (d) having a weight-average molecular weight of 1000 to 30000 and containing 1 to 50 parts by weight of a rosin-modified (meth)acrylate (d1) per 100 parts by weight of total monomer components.Type: ApplicationFiled: June 13, 2008Publication date: June 3, 2010Applicant: Nitto Denko CorporationInventors: Masanori Uesugi, Mitsuyoshi Shirai, Takashi Kondou, Masayuki Okamoto, Masahito Niwa