Patents Assigned to Teijin Chemicals, Ltd.
  • Patent number: 10042481
    Abstract: The present invention provides a transparent electroconductive laminate suitable for use in combination with a display device such as a liquid crystal display, and a transparent touch panel having the transparent electroconductive laminate. The transparent electroconductive laminate comprises a transparent organic polymer substrate 33 having, on at least one surface thereof, a hardcoat (HC) layer 33h, an optical interference layer 32, and a transparent electroconductive layer 31 in this order. The transparent electroconductive laminate satisfies the following conditions: the refractive indexes n3 and n3h of the transparent organic polymer substrate and the HC layer satisfy the following formula: |n3?n3h|?0.02, the thickness of the HC layer is from 1 to 10 ?m, the thickness of the optical interference layer is from 5 to 500 nm, the thickness of the transparent electroconductive layer is from 5 to 200 nm, the total light transmittance is 85% or more, and the b* value is from ?1.0 to less than 1.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: August 7, 2018
    Assignees: TEIJIN LIMITED, TEIJIN CHEMICALS LTD.
    Inventors: Haruhiko Itoh, Kouki Ikeda
  • Patent number: 9652059
    Abstract: Disclosed is a transparent electroconductive laminate which achieves the required transparency or haze characteristic while having a desirable slipperiness in terms of handleability. Further disclosed is a transparent touch panel having said transparent electroconductive laminate. The transparent laminate (10) has a transparent organic polymer substrate (1), a transparent electroconductive layer (2) on one face of the transparent organic polymer substrate, and a cured resin layer (3) with a concavo-convex surface on the other face of the transparent organic polymer substrate, and the transparent touch panel has said transparent electroconductive laminate. The cured resin layer (3) has a concavo-convex surface by being formed from a coating composition which contains two types of polymerizable components which mutually phase-separate on the basis of the physical difference therebetween.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: May 16, 2017
    Assignees: TEIJIN LIMITED, TEIJIN CHEMICALS LTD.
    Inventors: Haruhiko Itoh, Koichi Imamura
  • Patent number: 9598546
    Abstract: An optical film having a desired wavelength dispersion characteristic, a low photoelastic coefficient and a desired Nz coefficient. The optical film is formed from a copolymer and meets the following conditions (i) to (v): (i) the thickness (d) is 20 to 80 ?m; (ii) the following formulas (1) and (2) are satisfied: 0.6<R(450)/R(550)<1??(1) 1.01<R(650)/R(550)<1.40??(2) (R(450), R(550) and R(650) are retardations within the plane of the film at respective wavelengths); (iii) R(550) is 120 to 160 nm; (iv) the birefringence (?n) is not less than 1.5×10?3; and (v) the Nz coefficient represented by the following formula (4) is 1.18 to 2.40: Nz=(nx?nz)/(nx?ny)??(4) (nx, ny and nz are 3-dimensional birefringences of the film).
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: March 21, 2017
    Assignee: TEIJIN CHEMICALS, LTD.
    Inventors: Akiko Washizu, Masatoshi Ando, Tetsuya Motoyoshi, Shoichi Maekawa
  • Patent number: 9296143
    Abstract: It is an object of the present invention to provide a process capable of manufacturing various types of curved members having a high-grade design surface which are used as glazing members for means of transport such as automobiles at a low cost. The present invention is the process of manufacturing a curved member having a high-grade design surface, comprises the steps of: (1) preparing a sheet having a high-grade design surface by injection compression molding a resin material containing a thermoplastic resin; (2) preheating the sheet at a temperature of (Tg+5)° C. to (Tg+70)° C. (Tg(° C.) is the glass transition temperature of the resin material) to soften it; and (3) applying pressure to the softened sheet to curve the high-grade design surface.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: March 29, 2016
    Assignee: TEIJIN CHEMICALS, LTD.
    Inventors: Keiichi Kashima, Takehiro Suga, Junichi Miura, Ryo Niimi, Toshiaki Hotaka
  • Patent number: 9189112
    Abstract: Provided is a touch panel device which prevents a problem such as generation of Newton's rings even if an air layer between the touch panel device and a display device has a small thickness. This capacitance type touch panel device (100) includes: a protective transparent base (10) having an observation-side surface and a display device-side surface; and two polymer films with position detection electrode layers (20b, 22; 30b, 32) which are arranged on the display device-side surface of the protective transparent base. The difference between the minimum value and the maximum value of the linear expansion coefficients in the surface direction of all the polymer films (20b; 30b) arranged on the display device-side surface of the protective transparent base is 10.0×10?6 cm/cm·° C. or below. Furthermore, the display device with a touch panel device (100, 200, 300) according to the present invention has such a touch panel device.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: November 17, 2015
    Assignee: TEIJIN CHEMICALS LTD.
    Inventors: Koichi Imamura, Haruhiko Ito, Koki Ikeda
  • Patent number: 8969436
    Abstract: A method of producing a molded article by melting a granule at a temperature of 280 to 380° C. and molding it, wherein the granule satisfies the following conditions (I) and (II): (I) when 100 parts by weight of the granule is cleaned with 100 parts by weight of a 1N nitric acid aqueous solution, the amount of an Fe compound eluted into the 1N nitric acid aqueous solution cleaning fluid is 1 to 100 ppb in terms of the Fe atom based on the granule; and (II) the granule comprises (A) 100 parts by weight of a polycarbonate resin (component a) and (B) 0.00010 to 0.5 parts by weight of a specific phosphorous-based compound (component b).
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: March 3, 2015
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Manabu Norimatsu, Tomomitsu Onizawa, Seiichi Tanabe
  • Patent number: 8962780
    Abstract: It is an object of the present invention to provide a polycarbonate-polydiorganosiloxane copolymer having improved transparency. The present invention is the polycarbonate-polydiorganosiloxane copolymer comprises a polycarbonate block and a polydiorganosiloxane block, wherein (i) the copolymer has an aggregation structure comprising a matrix of the polycarbonate and polydiorganosiloxane domains dispersed therein; (ii) the polydiorganosiloxane domains have an average size of 5 to 40 nm and a normalized dispersity of not more than 30%; and (iii) the total light transmittance is not less than 88%.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: February 24, 2015
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Yuji Higaki, Katsuhiro Yamanaka, Fumitaka Kondo
  • Patent number: 8945704
    Abstract: A multi-layer film which is excellent in transferability to a metal shape during thermoforming and hardly produces uneven thickness, wrinkles, whitening or cracks on the surface of the obtained molded article. The multi-layer film has a layer (layer A) containing a polycarbonate resin and a polyester-based thermoplastic elastomer and a layer (layer B) containing an acrylic resin, wherein the layer B is formed on at least one side of the layer A.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: February 3, 2015
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Junichi Shibata, Hideaki Nitta, Shoichi Maekawa
  • Patent number: 8877304
    Abstract: It is an object of the present invention to provide an optical film which has reverse chromatic dispersibility that its retardation becomes smaller as the wavelength becomes shorter and a low photoelastic constant.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: November 4, 2014
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Tetsuya Motoyoshi, Masatoshi Ando, Makoto Ueno, Akiko Nishijima
  • Patent number: 8859655
    Abstract: A flame retardant resin composition which has high flame retardancy, excellent heat resistance and physical properties and is obtained from a plant-derived raw material and a molded article thereof. The flame retardant resin composition comprises: (A) 100 parts by weight of a polylactic acid and/or a lactic acid copolymer (component A); (B) 1 to 100 parts by weight of a styrene-based resin and/or a polycarbonate resin (component B); and (C) 1 to 100 parts by weight of an organic phosphorus compound represented by the following formula (1) (component C). (wherein X1 and X2 are the same or different and each an aromatic substituted alkyl group represented by the following formula (2)) ALAr)n??(2) (wherein AL is a branched or linear aliphatic hydrocarbon group having 1 to 5 carbon atoms, Ar is a phenyl group, naphthyl group or anthryl group all of which may have a substituent. n is an integer of 1 to 3, and Ar can be bonded to any carbon atom contained in AL.).
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: October 14, 2014
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Katsuhiro Yamanaka, Fumitaka Kondo
  • Patent number: 8859099
    Abstract: A laminate having excellent weatherability and abrasion resistance as well as adhesion. The laminate comprises a base, a first layer formed by thermally curing an acrylic resin composition and a second layer formed by thermally curing an organosiloxane resin composition, all of which are formed in the mentioned order, wherein the acrylic resin composition comprises: (A) an acrylic copolymer which contains at least 70 mol % of a recurring unit represented by the following formula (A): wherein X is a hydrogen atom or methyl group, and Y is a methyl group, ethyl group, cycloalkyl group, hydroxyalkyl group having 2 to 5 carbon atoms or triazine-based ultraviolet absorber residue; (B) a blocked polyisocyanate compound; (C) a curing catalyst; and (D) a triazine-based ultraviolet absorber, and the organosiloxane resin composition comprises: (E) colloidal silica and (F) a hydrolysis condensate of an alkoxysilane.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: October 14, 2014
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Toshio Kita, Shunsuke Kajiwara, Ryou Niimi, Takehiro Suga, Tatsuya Ekinaka, Nobuaki Takaoka
  • Patent number: 8846180
    Abstract: A retardation film which has few foreign matter defects and small retardation nonuniformity and meets the required quality of a retardation film is provided with high productivity at a low cost by melt extruding a polycarbonate. The retardation film obtained by stretching and orienting a melt extruded film of a polycarbonate is characterized in that: (1) the polycarbonate constituting the film has a viscosity average molecular weight of 1.3×104 to 1.8×104; (2) the retardation R(589) within the plane of the film measured at a wavelength of 589 nm is 50 to 800 nm; (3) the retardation R(589) nonuniformity within the plane of the film is ±5 nm; (4) the average thickness of the film is 10 to 150 ?m; and (5) the number of film defects as large as 100 ?m or more is 2 or less/m2.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: September 30, 2014
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Hideaki Nitta, Junichi Shibata, Atsushi Sasaki, Masahiro Murakami
  • Patent number: 8765891
    Abstract: It is an object of the present invention to provide a laminate having excellent weatherability and abrasion resistance as well as adhesion. The present invention relates to a laminate comprising a base, a first layer formed by thermally curing an acrylic resin composition and a second layer formed by thermally curing an organosiloxane resin composition, all of which are formed in the mentioned order, wherein the acrylic resin composition comprises: (A) an acrylic copolymer which contains at least 70 mol % of a recurring unit represented by the following formula (A): wherein X is a hydrogen atom or methyl group, and Y is a methyl group, ethyl group, cycloalkyl group, hydroxyalkyl group having 2 to 5 carbon atoms or triazine-based ultraviolet absorber residue; (B) a blocked polyisocyanate compound; (C) a curing catalyst; and (D) a triazine-based ultraviolet absorber, and the organosiloxane resin composition comprises: (E) colloidal silica and (F) a hydrolysis condensate of an alkoxysilane.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: July 1, 2014
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Toshio Kita, Shunsuke Kajiwara, Ryou Niimi, Takehiro Suga, Tatsuya Ekinaka, Nobuaki Takaoka
  • Patent number: 8697796
    Abstract: A resin composition comprising 3.0 to 7.0 parts by weight of an acryl-modified polyorganosiloxane (component B) obtained by graft copolymerizing a specific polyorganosiloxane (component B1) with a (meth)acrylic ester based on 100 parts by weight of an aromatic polycarbonate resin (component A), and a molded article thereof. The resin composition is excellent in slidability, impact resistance, heat resistance and dimensional stability and has a good surface appearance.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: April 15, 2014
    Assignee: Teijin Chemicals, Ltd.
    Inventor: Ryusuke Ikematsu
  • Patent number: 8697788
    Abstract: This invention seeks to provide a resin composition and a molded article which are excellent in transparency, weatherability, resistance to boiling water and resistance to molding heat, which have an internal strain reduced and which are excellent in breaking durability. This invention is a resin composition comprising (A) 100 parts by weight of a polycarbonate resin (component A), (B) 0.005 to 1 part by weight of an ester (component B) of pentaerythritol and an aliphatic carboxylic acid, (C) 0.003 to 0.2 part by weight of an epoxy compound (component C), (D) 0.01 to 1 part by weight of an ultraviolet absorbent (component D), and (E) 0.001 to 0.5 part by weight of a phosphorus stabilizer (component E), wherein the components B and the component C have a critical stress of 12 MPa or more each when they are treated at a temperature of 120° C.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: April 15, 2014
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Seiichi Tanabe, Atsushi Kitamura
  • Patent number: 8648165
    Abstract: The present invention seeks to provide a resin composition which contains an aromatic polycarbonate resin and a polyester resin and which has excellent mechanical strength, flowability and thermal stability and also has excellent moist heat resistance together. The present invention is a resin composition containing 50 to 99 parts by weight of an aromatic polycarbonate resin (component A) and 1 to 50 parts by weight of a polyester resin (component B), the component B being a polyester resin polymerized in the presence of a titanium-phosphorus catalyst obtained by reacting titanium tetrabutoxide, etc., with monolauryl phosphate, etc.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: February 11, 2014
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Atsushi Sumita, Daisuke Takahashi, Fumihiro Togashi, Tomoyuki Hirano
  • Publication number: 20140027686
    Abstract: A polycarbonate resin composition which has high light transmission performance in the visible light region, excellent infrared shielding properties and excellent resistance to molding heat, can contribute to the reduction of an environmental burden, and has such high designability that it can be tinted in various colors as well as a molded article thereof. The polycarbonate resin composition comprises: (A) 100 parts by weight of a polycarbonate resin (component A); (B) 0.001 to 0.1 part by weight of an inorganic infrared shielding material (component B); and (C) 0.01 to 1 part by weight of an ultraviolet absorbent represented by the following formula (1) (component C).
    Type: Application
    Filed: September 26, 2013
    Publication date: January 30, 2014
    Applicant: TEIJIN CHEMICALS LTD.
    Inventors: Fumihiro TOGASHI, Takashi KOGA
  • Patent number: 8541537
    Abstract: This invention provides a branched polycarbonate resin obtained from a dihydric phenol compound, a branching agent, monohydric phenols and phosgene by an interfacial polymerization reaction method in the presence of an alkali aqueous solution and an organic solvent, the branched polycarbonate resin having features that: (i) the branching agent content (X) thereof is over 0.70 mol % but 1.50 mol % or less, (ii) the branching agent content (X) and the melt tension (Y) thereof at 280° C. satisfy the following expression (1), 3.8X?2.4?Y?3.8X+4.5 (1), and (iii) the entire N content in the branched polycarbonate resin is 0 to 7 ppm.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: September 24, 2013
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Takayuki Ozaki, Hiroshi Okamoto, Hiroshi Shuto
  • Publication number: 20130231435
    Abstract: There are provided a resin composition including a polylactic acid which (i) includes a poly-L-lactic acid (component B-1) and a poly-D-lactic acid (component B-4), (ii) has a weight ratio of the component B-1 to the component B-4 (component B-1/component B-4) of 10/90 to 90/10, and (iii) shows a proportion of melt peaks at 195° C. or higher to all melt peaks in a temperature rising process in measurement by a differential scanning calorimeter (DSC) of at least 20%; a molded article of the resin composition; and methods for producing the resin composition and the molded article.
    Type: Application
    Filed: April 18, 2013
    Publication date: September 5, 2013
    Applicants: TEIJIN LIMITED, TEIJIN CHEMICALS LTD.
    Inventors: Katsuhiko HIRONAKA, Fumitaka KONDO, Keiichiro INO, Yuichi MATSUNO, Kiyotsuna TOYOHARA, Hirotaka SUZUKI, Ryuji NONOKAWA, Takaaki MATSUDA
  • Patent number: 8524824
    Abstract: To provide a resin composition comprising an aromatic polycarbonate resin and having excellent appearance, impact strength, thermal stability, hydrolysis resistance, and flame retardancy. The present invention relates to a resin composition comprising (A) 75 to 99.98 wt % of an aromatic polycarbonate resin (component A), (B) 0.01 to 5 wt % of a mixture of polytetrafluoroethylene particles and an organic polymer (component B) and (C) 0.01 to 20 wt % of a flame retardant (component C), wherein the sodium metal ion content of the component B (excluding sodium metal ion contained in the polytetrafluoroethylene particles) is 10 ppm or less, and molded articles therefrom.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: September 3, 2013
    Assignee: Teijin Chemicals, Ltd.
    Inventors: Takuya Tomoda, Yoshihisa Shinagawa, Shinichi Soda