Patents Assigned to Kuraray Co., Ltd.
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Publication number: 20250101218Abstract: A curable resin composition that includes a curable resin (A) and acrylic rubber particles (B), the acrylic rubber particles (B) having a multilayer structure of two or more layers including an inner layer that includes a crosslinked rubber polymer having an acrylic acid ester unit, and an outermost layer that includes a hard polymer, the outermost layer of the acrylic rubber particles (B) having a thickness of 3.5 nm or more. Also an adhesive and a curing agent each including the curable resin composition, and a cured article of the curable resin composition.Type: ApplicationFiled: January 23, 2023Publication date: March 27, 2025Applicant: KURARAY CO., LTD.Inventors: Yasunari UMEDA, Kimitoshi NAKAMURA
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Patent number: 12258276Abstract: One aspect of the present invention relates to a carbonaceous material which has a benzene adsorption of 25 to 40% and a vitamin B12 adsorption of 13.0 to 50.0 mg/g, while having a pore volume of mesopores of 0.070 to 0.150 cm3/g as calculated from a nitrogen adsorption isotherm by means of a BJH method.Type: GrantFiled: April 22, 2020Date of Patent: March 25, 2025Assignee: KURARAY CO., LTD.Inventors: Shuichi Ishida, Tetsuya Hanamoto, Hiroe Yoshinobu
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Publication number: 20250091255Abstract: Provided is a composite material that is useful as a reinforcement, and the like. The composite material at least includes a woven fabric which contains weaving yarns being fibers each having a tensile elastic modulus of 20 GPa or higher, and a thermoplastic elastomer resin. The thermoplastic elastomer resin penetrates through openings of the woven fabric from one surface of the woven fabric, and is exposed at another surface.Type: ApplicationFiled: December 27, 2022Publication date: March 20, 2025Applicant: KURARAY CO., LTD.Inventors: Kazumasa KUSUDO, Yoshifumi ASO, Satoshi KATSUYA
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Publication number: 20250091260Abstract: The present invention relates to a method for producing a resin sheet containing at least the following step P, Step P: a step of applying pressure (p) to a sheet-shaped resin modeled article formed by a 3D printer while heating, and deforming the sheet-shaped resin modeled article to obtain a compressed sheet; and relates to a polishing pad containing a polishing layer obtained by using the method for producing.Type: ApplicationFiled: January 30, 2023Publication date: March 20, 2025Applicant: KURARAY CO., LTD.Inventors: Mitsuru KATO, Takashi SUGIOKA
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Publication number: 20250096452Abstract: An antenna system includes: a laminate including a plurality of high-frequency permeable layers; and an antenna circuit board including a high-frequency insulating layer. n-th layer of the plurality of high-frequency permeable layers has a thickness Ln within a range of Lnmin ±?(10??n). The n-th layer is at least one high-frequency permeable layer of the laminate. ?n denotes a relative dielectric constant of the n-th layer; ? denotes a wavelength of the high-frequency wave that is incident on the laminate; and Lnmin denotes a thickness of the n-th layer where an intensity of a reflected wave from the laminate is minimized, the intensity being determined as an intensity of a composite wave of reflected waves from a front surface, a back surface, and joint interfaces of the laminate.Type: ApplicationFiled: January 17, 2023Publication date: March 20, 2025Applicant: KURARAY CO., LTD.Inventors: Keisuke IKEDA, Tatsuya SUNAMOTO, Minoru ONODERA
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Patent number: 12252634Abstract: Disclosed are a polyurethane for use in a polishing layer, and a polishing layer and a polishing pad using the same, the polyurethane including a terminal group represented by the following formula (I): R—(OX)n— (I) wherein R represents a monovalent hydrocarbon group having 1 to 30 carbon atoms that may be substituted with a heteroatom or may be interrupted by a heteroatom, X represents an alkylene group having 2 to 4 carbon atoms, 90 to 100% of the alkylene group being an ethylene group, and n represents a number from 8 to 120.Type: GrantFiled: September 3, 2019Date of Patent: March 18, 2025Assignee: KURARAY CO., LTD.Inventors: Mitsuru Kato, Chihiro Okamoto, Shinya Kato
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Publication number: 20250083278Abstract: A polishing pad is provided with a spiral groove or concentric grooves disposed spanning from a central region to a peripheral edge region of a polishing surface of the polishing pad, and radial grooves including line segment-shaped grooves extending from the central region toward the peripheral edge region. The line segment-shaped grooves have a first end portion and a second end portion, positioned at a distance of 5 to 10% and at a distance of 35 to 70% of the radius of the polishing surface from a center of the radial grooves, respectively, and the line segment-shaped grooves have an average length of 30 to 65% of the radius of the polishing surface. A cross-sectional area Sa (mm2) of the line segment-shaped grooves and a cross-sectional area Sb (mm2) of the spiral groove or the concentric grooves satisfy 0.1?Sb/Sa<1.0.Type: ApplicationFiled: August 1, 2022Publication date: March 13, 2025Applicant: KURARAY CO., LTD.Inventors: Azusa SUNAYAMA, Mitsuru KATO, Minori TAKEGOSHI
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Patent number: 12247355Abstract: A coating agent for paper comprises: an ethylene-vinyl alcohol copolymer, wherein the ethylene-vinyl alcohol copolymer has a content of ethylene units of 1 mol % or more and less than 20 mol % and a block character of the ethylene units from 0.90 to 0.99. Coated paper is obtained by coating paper with such a coating agent. The coating agent of the present invention is excellent in viscosity stability and also causes the resulting coated paper to be excellent in barrier properties and water resistance.Type: GrantFiled: October 15, 2020Date of Patent: March 11, 2025Assignee: KURARAY CO., LTD.Inventor: Yuta Taoka
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Publication number: 20250075381Abstract: A liquid crystal polyester multifilament has an initial modulus variation of 3.0% or less and a tensile strength of 18 cN/dtex or more.Type: ApplicationFiled: November 18, 2024Publication date: March 6, 2025Applicant: KURARAY CO., LTD.Inventors: Keiichi IKEHATA, Junya IDE
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Patent number: 12240928Abstract: A polyvinyl alcohol-based crosslinked copolymer may include an unsaturated monocarboxylic acid-based structural unit, wherein an amount of carboxylate-forming structural units in the crosslinked copolymer is 1% by mole or more and 35% by mole or less with respect to all structural units constituting the crosslinked copolymer, and a solubility of the crosslinked copolymer in water is 90% or less.Type: GrantFiled: December 26, 2019Date of Patent: March 4, 2025Assignee: KURARAY CO., LTD.Inventors: Yusuke Saegusa, Masahiro Baba, Toshinori Kato
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Publication number: 20250068073Abstract: Provided is a photosensitive resin composition comprising a thermoplastic elastomer (A), a liquid farnesene rubber (B), an ethylenically unsaturated compound (C), and a photoinitiator (D).Type: ApplicationFiled: December 22, 2022Publication date: February 27, 2025Applicant: KURARAY CO., LTD.Inventors: Yoshikazu UENO, Yosuke UEHARA
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Patent number: 12233620Abstract: A thermoplastic liquid crystal polymer (TLCP) molded body including a thermoplastic polymer capable of forming an optically anisotropic melt phase. The TLCP molded body includes an adherend portion in at least a part of the TLCP molded body. The adherend portion has a surface satisfying: a ratio <C—O>/<COO> of 1.5 or greater in which the <C—O> represents a proportion of a peak area of [C—O bond] to a C(1s) peak area, and the <COO> represents a proportion of a peak area of [COO bond] based on the C(1s) peak area; and a ratio <C?O>/<COO> of 0.10 or higher in which the <C?O> represents a proportion of a peak area of [C?O bond] based on the C(1s) peak area, and the <COO> represents the proportion of the peak area of the [COO bond] based on the C(1s) peak area in a result of X-ray photoelectron spectroscopy analysis.Type: GrantFiled: May 27, 2019Date of Patent: February 25, 2025Assignee: KURARAY CO., LTD.Inventors: Tatsuya Sunamoto, Shinji Hiramatsu, Minoru Onodera
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Patent number: 12234333Abstract: Provided are a water-soluble film preferably used for production of a package that has excellent surface gloss and has excellent anti-blocking properties, and a package using the same. A water-soluble film includes a polyvinyl alcohol resin, wherein the water-soluble film has a glossy surface with an average height SRc(G) of 1.8 ?m or less and a maximum height SRz(G) of 20 ?m or more and 50 ?m or less.Type: GrantFiled: June 28, 2021Date of Patent: February 25, 2025Assignee: KURARAY CO., LTD.Inventors: Minoru Okamoto, Sayaka Shimizu, Osamu Kazeto
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Publication number: 20250059325Abstract: A composite includes a polyamide (A) and continuous fibers (B), wherein the polyamide (A) comprises a diamine unit (X) and a dicarboxylic acid unit (Y), the diamine unit (X) comprises 0.1 mol % or more and less than 36 mol % of a diamine unit (X1), and the aliphatic diamine has 6 to 10 carbon atoms, the aliphatic diamine having an alkyl group having two or three carbon atoms bonded to a carbon atom at 2-position when a carbon atom to which any one of two amino groups is bonded is taken as 1-position.Type: ApplicationFiled: December 19, 2022Publication date: February 20, 2025Applicant: KURARAY CO., LTD.Inventor: Atsushi NANYA
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Publication number: 20250059305Abstract: A vinyl alcohol copolymer may include a vinyl alcohol constituent unit and an olefin constituent unit vinyl alcohol having 3 to 30 carbon atoms. Such a copolymer may satisfy at least one of: a difference between a melting point and a lowest heat-sealing temperature is 45° C. or more; and the lowest heat-sealing temperature is 80° C. or less. Such a copolymer may satisfy predetermined relational formulas based on intensities and the number average molecular weight obtained from a UV absorption detector and a refractive index detector in gel permeation chromatography measurement performed on the copolymer.Type: ApplicationFiled: December 22, 2022Publication date: February 20, 2025Applicant: Kuraray Co., Ltd.Inventors: Masahiro BABA, Shinnosuke AKUTAGAWA, Shingo UEYAMA, Hiroyuki KONISHI
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Publication number: 20250059306Abstract: Provided is a modified product of a hydrogenated product of a block copolymer that can be added to obtain a resin composition having an excellent balance of mechanical properties such as tensile strength, tensile strain at break, and impact resistance. A modified hydrogenated product of a block copolymer including a polymer block containing a structural unit derived from an aromatic vinyl compound and a polymer block containing a structural unit derived from a conjugated diene compound, in which the conjugated diene compound contains isoprene and a conjugated diene compound other than isoprene; the polymer block has a vinyl bonding amount of 30 mol % or less; the modified hydrogenated product has one, or two or more functional groups selected from an alkoxysilyl group, a carboxy group, an amino group, a hydroxy group, an epoxy group, and an acid anhydride-derived group, and has a peak top intensity of loss tangent of 0.95 or less and a melt flow rate (MFR) of 0.5 g/10 min or more.Type: ApplicationFiled: December 15, 2022Publication date: February 20, 2025Applicant: KURARAY CO., LTD.Inventors: Masahiro KATO, Yasushi SENDA, Ryo SATANI
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Publication number: 20250059326Abstract: Provided is a polyamide composition, which has high moldability and excellent heat resistance and chemical resistance. The polyamide composition contains a polyamide (A), a copper compound (B1) and a metal halide (B2), and in which the polyamide (A) comprises a diamine unit (X) and a dicarboxylic acid unit (Y), the diamine unit (X) contains 0.1 mol % or more and less than 36 mol % of a diamine unit (X1), and the diamine unit (X1) is a diamine unit derived from an aliphatic diamine, in which the aliphatic diamine has 6 to 10 carbon atoms, the aliphatic diamine having an alkyl group having 2 or 3 carbon atoms bonded to a carbon atom at 2-position when a carbon atom to which any one of two amino groups is bonded is taken as 1-position.Type: ApplicationFiled: December 19, 2022Publication date: February 20, 2025Applicant: KURARAY CO., LTD.Inventors: Naoto SUGAI, Atsushi NANYA
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Publication number: 20250059346Abstract: Provided is a polyamide composition, which has high moldability and excellent heat resistance and chemical resistance. The polyamide composition contains a polyamide (A) and an organic heat stabilizer (B), and in which the polyamide (A) contains a diamine unit (X) and a dicarboxylic acid unit (Y), the diamine unit (X) contains 0.1 mol % or more and less than 36 mol % of a diamine unit (X1), and the diamine unit (X1) is a constituent unit derived from an aliphatic diamine, in which the aliphatic diamine has 6 to 10 carbon atoms, the aliphatic diamine having an alkyl group having 2 or 3 carbon atoms bonded to a carbon atom at 2-position when a carbon atom to which any one of two amino groups is bonded is taken as 1-position.Type: ApplicationFiled: December 19, 2022Publication date: February 20, 2025Applicant: KURARAY CO., LTD.Inventors: Naoto SUGAI, Atsushi NANYA
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Patent number: D1067374Type: GrantFiled: March 29, 2022Date of Patent: March 18, 2025Assignee: KURARAY CO., LTD.Inventors: Youhei Yabuno, Kazuhiko Eda
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Patent number: D1067375Type: GrantFiled: March 29, 2022Date of Patent: March 18, 2025Assignee: KURARAY CO., LTD.Inventors: Youhei Yabuno, Kazuhiko Eda