Patents Assigned to DIC Corporation (Tokyo)
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Publication number: 20200208054Abstract: The present invention provides a liquid crystal composition, containing: one kind or two or more kinds of a first monomer having a first mesogenic skeleton, at least one polymerizable group represented by the general formula (PG1) linked to the first mesogenic skeleton, and at least one polar group linked to the mesogenic skeleton or the polymerizable group; and one kind or two or more kinds of a second monomer having a second mesogenic skeleton and a polymerizable group represented by the general formula (PG2) linked to the second mesogenic skeleton, and having a chemical structure different from that of the first monomer, in an amount of more than 0.4% by mass, which is excellent in vertical alignment, burn-in characteristics (change with time of pretilt angle), and compatibility, and provides a liquid crystal display element using the liquid crystal composition.Type: ApplicationFiled: June 14, 2018Publication date: July 2, 2020Applicant: DIC CORPORATION (TOKYO)Inventors: Junko Yamamoto, Junichi Mamiya, Yuichi Inoue, Masaomi Kimura
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Patent number: 10470312Abstract: There is provided a method for forming an electrically conductive ultrafine pattern which has an excellent pattern cross-sectional shape is provided by a composite technique including a printing process and a plating process, and furthermore, by imparting excellent adhesion to each interface of a laminate including a plating core pattern, an electrically conductive ultrafine pattern which can be preferably used as a highly accurate electric circuit and a method for manufacturing the same are also provided. The method includes (1) a step of applying a resin composition to form a receiving layer on a substrate; (2) a step of printing an ink containing plating core particles by a reverse offset printing method to form a plating core pattern on the receiving layer; and (3) a step of depositing a metal on the plating core pattern formed in the step (2) by an electrolytic plating method.Type: GrantFiled: March 6, 2014Date of Patent: November 5, 2019Assignee: DIC CORPORATION (TOKYO)Inventors: Sunao Yoshihara, Haruhiko Katsuta, Yoshinori Katayama, Jun Shirakami, Akira Murakawa, Wataru Fujikawa, Yukie Saitou
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Patent number: 10287502Abstract: A liquid crystal composition containing a polymerizable compound of the present invention has excellent characteristics of being able to prepare a PSA type liquid crystal display element with no problem of depositing in a wide temperature range, having high polymerization speed, high liquid crystal alignment regulation force after polymerization, excellent display qualities with no display unevenness, and excellent display characteristics with no defects in display characteristics such as image sticking and is appropriate as a liquid crystal composition in a practical use. Further, the liquid crystal display element with the above-described liquid crystal composition can be appropriately used for a PSA type liquid crystal display element.Type: GrantFiled: May 10, 2016Date of Patent: May 14, 2019Assignee: DIC CORPORATION (TOKYO)Inventors: Kazuki Kurisawa, Takeshi Kuriyama, Shotaro Kawakami
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Patent number: 10240044Abstract: The present invention provides an aqueous pigment dispersion including a pigment, an anionic group-containing organic polymer compound, and bio-nanofibers having an average diameter of 1 nm or more and 100 nm or less and an aspect ratio of 100 or more, and also provides an aqueous ink using the aqueous pigment dispersion. The bio-nanofibers are preferably cellulose nanofibers or chitosan nanofibers. The anionic group-containing organic polymer compound is preferably at least one selected from the group consisting of acrylic resins having anionic groups, polyurethane resins having anionic groups, and polysaccharide derivatives having anionic groups.Type: GrantFiled: April 16, 2015Date of Patent: March 26, 2019Assignee: DIC CORPORATION (TOKYO)Inventors: Yukihiko Kawaharada, Takaaki Nabe
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Patent number: 10158087Abstract: The present invention provides an organic thin film and an organic transistor having high performance stability and mobility. Specifically, there are provided an organic thin film including a compound containing a charge transporting molecular unit A having a structure of an aromatic fused ring system and a unit B serving as a side chain, the compound having a bilayer structure; an organic semiconductor device including the organic thin film; and an organic transistor including the organic thin film used as an organic semiconductor layer.Type: GrantFiled: March 6, 2014Date of Patent: December 18, 2018Assignee: DIC CORPORATION (TOKYO)Inventors: Junichi Hanna, Hiroaki Iino, Yasuyuki Watanabe, Junichiro Koike, Hiroshi Maki, Yutaka Tachikawa, Atsuhisa Miyawaki, Yoshinobu Sakurai
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Patent number: 10133109Abstract: Provided is an LCD device having excellent high speed responsiveness. This LCD device contains a polymer or a copolymer in a liquid crystal composition sandwiched between two transparent substrates, at least one of which has an electrode, and the content of the polymer or the copolymer is 1% by mass or greater and less than 40% by mass of the total mass of the liquid crystal composition and the polymer or the copolymer. This LCD device can be applied to various operation modes such as TN, STN, ECB, VA, VA-TN, IPS, FFS, a ? cell, OCB, and cholesteric liquid crystals.Type: GrantFiled: February 12, 2015Date of Patent: November 20, 2018Assignee: DIC CORPORATION (TOKYO)Inventors: Toru Fujisawa, Go Sudo, Shuuhei Yamamoto, Kazunori Maruyama, Haruyoshi Takatsu, Marina Goto, Fumiaki Kodera, Keumhee Jang
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Patent number: 10113080Abstract: A method for manufacturing an aqueous black pigment dispersion, including the steps of subjecting a mixture containing carbon black and an aqueous medium to media-less dispersion and adding a resin having anionic groups and a basic compound after the dispersion, wherein the carbon black has a carboxylic acid group on the surface such that the value produced by dividing the amount of carboxylic acid group present on the surface by BET value is 0.8 to 5.5 (?mol/m2) and the resin having anionic groups is an urethane resin that satisfies (weight average molecular weight/acid value)<1,400 or a styrene acrylic resin that satisfies (weight average molecular weight/acid value)<120.Type: GrantFiled: January 22, 2015Date of Patent: October 30, 2018Assignee: DIC CORPORATION (TOKYO)Inventors: Yoshinosuke Shimamura, Mariko Toshimitsu, Takaaki Nabe, Yoshihiro Sato
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Patent number: 10113115Abstract: There is provided a liquid crystal composition having the following properties without suffering reductions in refractive index anisotropy (?n) and nematic phase-isotropic liquid phase transition temperature (Tm): sufficiently low viscosity (?), sufficiently low rotational viscosity (?1), a large elastic constant (K33), and a negative dielectric anisotropy (??) with a large absolute value. There is also provided a liquid crystal display device of, for example, a VA type that uses such a liquid crystal composition and that has a high response speed and excellent display quality with defective display being eliminated or reduced. In particular, a liquid crystal composition having a negative dielectric anisotropy is provided, the composition containing a first component that is at least one compound represented by General Formula (i) and a second component that is at least one compound selected from compounds represented by General Formula (L).Type: GrantFiled: September 1, 2015Date of Patent: October 30, 2018Assignee: DIC CORPORATION (TOKYO)Inventors: Kazunori Maruyama, Shinichi Hirata
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Patent number: 10093835Abstract: There is provided a double-sided adhesive tape includes a foam base, a resin film disposed on a surface of the foam base, an adhesive layer disposed on a surface of the resin film, and an adhesive layer disposed on another surface of the foam base. The foam base has a density of 0.45 g/cm3 or less and an interlaminar strength of 10 N/cm or more. The adhesive layer has a 180°-peel adhesion of 10 N/20 mm or more. The 180°-peel adhesion is measured at a peeling speed of 300 mm/min when an adhesive tape including a 25-?m-thick PET base and a 25-?m-thick adhesive layer disposed on the PET base is bonded to an aluminium board at 23° C. and 65% RH by pressing the adhesive tape against the aluminium board with one stroke of a 2-kg roller and subsequently the adhesive tape is left standing for 1 hour at 23° C. and 50% RH.Type: GrantFiled: April 22, 2014Date of Patent: October 9, 2018Assignee: DIC CORPORATION (TOKYO)Inventors: Akira Yamakami, Hideaki Takei, Yuki Ogawa, Yumi Kamikawa, Takeshi Iwasaki
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Patent number: 10011771Abstract: A liquid crystal composition containing a polymerizable compound of the present invention has excellent characteristics of being able to prepare a PSA type liquid crystal display element with no problem of depositing in a wide temperature range, having high polymerization speed, high liquid crystal alignment regulation force after polymerization, excellent display qualities with no display unevenness, and excellent display characteristics with no defects in display characteristics such as image sticking and is appropriate as a liquid crystal composition in a practical use. Further, the liquid crystal display element with the above-described liquid crystal composition can be appropriately used for a PSA type liquid crystal display element.Type: GrantFiled: August 10, 2012Date of Patent: July 3, 2018Assignee: DIC CORPORATION (TOKYO)Inventors: Kazuki Kurisawa, Takeshi Kuriyama, Shotaro Kawakami
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Patent number: 9701857Abstract: There are provided an active energy ray-curable composition containing a polymerizable compound represented by General Formula (1), a polymerizable compound represented by General Formula (2), and a photopolymerization initiator, and an ink composition for inkjet recording use. CH2?CR1—CO—O—R2—O—CH?CH—R3??(1) (In Formula (1), R1 represents a hydrogen atom or a methyl group, R2 represents an organic residue having 2 to 20 carbon atoms, and R3 represents a hydrogen atom or an organic residue having 1 to 11 carbon atoms.) (In Formula (2), each of R4 and R5 independently represents a hydrogen atom or a methyl group, each of R6a, R6b, and R6c independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and m+n represents an integer of 0 to 4.).Type: GrantFiled: May 27, 2014Date of Patent: July 11, 2017Assignee: DIC CORPORATION (TOKYO)Inventors: Tomokazu Yamada, Yoichi Tanimoto
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Patent number: 9688817Abstract: A problem is to provide a method for producing a polyarylene sulfide resin having excellent reactivity to other compounds and resins, such as an impact resistance improver such as an epoxysilane coupling agent, a functional group-containing thermoplastic elastomer, or the like, and also provide a polyarylene sulfide resin composition produced by the production method, not containing chlorine atoms, and having the excellent reactivity. A method for producing a polyarylene sulfide resin includes performing polymerization reaction of a mixture containing a diiodo aromatic compound, a sulfur compound, and a polymerization inhibitor having a specified functional group. The problem can be solved by using a polyarylene sulfide resin composition containing a polyarylene sulfide resin having a specified terminal functional group and iodine atoms within a range of 0.01 to 10,000 ppm relative to the polyarylene sulfide resin.Type: GrantFiled: March 20, 2014Date of Patent: June 27, 2017Assignee: DIC CORPORATION (TOKYO)Inventors: Hajime Watanabe, Toshio Hinokimori
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Publication number: 20170058160Abstract: The present invention relates to a liquid crystal display device including a particular liquid crystal composition and a cured product of a particular curable resin composition serving as a sealant. The present invention provides a liquid crystal display device that does not suffer from a decrease in the voltage holding ratio (VHR) or increase in the ion density (ID) of the liquid crystal layer or the problem of display defects such as white spots, alignment unevenness, and image-sticking.Type: ApplicationFiled: July 23, 2014Publication date: March 2, 2017Applicant: DIC CORPORATION (TOKYO)Inventors: Yoshiyuki ONO, Jouji KAWAMURA, Yoshinori IWASHITA, Hiroyuki TAKEDA
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Publication number: 20170051150Abstract: The present invention provides an aqueous pigment dispersion including a pigment, an anionic group-containing organic polymer compound, and bio-nanofibers having an average diameter of 1 nm or more and 100 nm or less and an aspect ratio of 100 or more, and also provides an aqueous ink using the aqueous pigment dispersion. The bio-nanofibers are preferably cellulose nanofibers or chitosan nanofibers. The anionic group-containing organic polymer compound is preferably at least one selected from the group consisting of acrylic resins having anionic groups, polyurethane resins having anionic groups, and polysaccharide derivatives having anionic groups.Type: ApplicationFiled: April 16, 2015Publication date: February 23, 2017Applicant: DIC CORPORATION (TOKYO)Inventors: Yukihiko Kawaharada, Takaaki Nabe
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Publication number: 20170051203Abstract: The present invention relates to a nematic liquid crystal composition containing a polymerizable compound and having a negative dielectric anisotropy (??) and PSA or PSVA liquid crystal display element produced by using the same. The liquid crystal composition according to the present invention can provide PSA or PSVA liquid crystal display element, in which a sufficient pretilt angle is included, the amount of remaining monomer is small, there are no or almost no problems, e.g., alignment defects and display defects, arisen from a low voltage holding rate (VHR) and the like, and excellent response performance is exhibited. A liquid crystal display element using the liquid crystal composition according to the present invention is useful for an active-matrix-drive liquid crystal display element and can be applied to PSA, PSVA, and other liquid crystal display elements.Type: ApplicationFiled: April 9, 2015Publication date: February 23, 2017Applicant: DIC CORPORATION (TOKYO)Inventors: Go Sudo, Marina Goto
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Publication number: 20160272888Abstract: An object of the present invention is to provide a polymerizable liquid crystal composition with which two characteristics of smoothness of a surface of an anisotropic optical body and orientation properties of liquid crystals can be simultaneously improved, when preparing an anisotropic optical body to be obtained by photopolymerization of the polymerizable liquid crystal composition. Specifically, an object of the present invention is to provide a polymerizable liquid crystal composition containing specific polymerizable compounds and a fluorine-based surfactant. In addition, an anisotropic optical body, a retardation film, an antireflective film, and a liquid crystal display element prepared using the polymerizable liquid crystal composition of the present invention are also provided.Type: ApplicationFiled: October 7, 2014Publication date: September 22, 2016Applicant: DIC CORPORATION (TOKYO)Inventors: Koichi Endou, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kazuaki Hatsusaka
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Patent number: 9347001Abstract: There is provided a liquid crystal composition containing a compound represented by Formula (i) and a compound represented by General Formula (ii) (where Rii1 and Rii2 each independently represent an alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, or an alkenyl group having 4 or 5 carbon atoms; and Xii1 and Xii2 each independently represent a hydrogen atom or a fluorine atom). There is also provided a liquid crystal display device in which such a liquid crystal composition is used.Type: GrantFiled: March 6, 2013Date of Patent: May 24, 2016Assignee: DIC CORPORATION (TOKYO)Inventors: Joji Kawamura, Makoto Negishi, Yoshinori Iwashita
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Patent number: 9321961Abstract: Provided is a liquid crystal composition having a positive dielectric anisotropy, the liquid crystal composition containing two or more compounds selected from compounds represented by general formula (LC0-1) to general formula (LC0-3), and one or more compounds selected from groups of compounds represented by general formula (LC1) to general formula (LC5). The liquid crystal composition has features of a large ?? and a low viscosity, and provides a practical, highly reliable liquid crystal display element that can realize low-voltage driving and high-speed response. The liquid crystal composition is useful for an active matrix driving liquid crystal display element. The liquid crystal composition can be applied to a liquid crystal display element of an IPS mode or the like.Type: GrantFiled: August 29, 2013Date of Patent: April 26, 2016Assignee: DIC CORPORATION (TOKYO)Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
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Patent number: 9321960Abstract: A composition containing a compound represented by general formula (i) and a compound represented by general formula (ii): in the formulas, each of Xi1 to Xi6 independently represents a hydrogen atom, a fluorine atom or a chlorine atom, and each of Xii1 to Xii4 independently represents a hydrogen atom, a fluorine atom or a chlorine atom.Type: GrantFiled: December 11, 2012Date of Patent: April 26, 2016Assignee: DIC CORPORATION (TOKYO)Inventors: Joji Kawamura, Makoto Negishi, Masahiro Niwa
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Patent number: 9315727Abstract: There is provided a liquid crystal composition containing the compound represented by the general formula (1) and a liquid crystal display device that uses the liquid crystal composition. The compound represented by the general formula (1) has high ??, high Tni, and good miscibility with other liquid crystal compounds. Therefore, a liquid crystal composition that has high ?? and exhibits a liquid crystal phase in a wide temperature range can be obtained by using the compound represented by the general formula (1) as a component of the liquid crystal composition. Thus, the compound is very useful as a constituent component of the liquid crystal composition for liquid crystal display devices.Type: GrantFiled: September 19, 2013Date of Patent: April 19, 2016Assignee: DIC CORPORATION (TOKYO)Inventors: Kenta Tojo, Tetsuo Kusumoto