# US 2020/0399465 A1 · Liquid crystal polyester resin composition and molded body > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399465 A1 - Document ID: US20200399465A1 - Status: Published application - Kind: A1 - Application number: 16/764,621 - Filed: 2018-11-21 - Published: 2020-12-24 - Earliest claimed: 2017-11-27 - Assignees: Sumitomo Chemical Company, Limited - Applicants: Sumitomo Chemical Company, Limited - Inventors: Tomoyuki HARA - Web page: https://patentgrep.com/patent/US20200399465A1 ## CPC - C08K 7/14: Glass - C08L 67/04: Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) - C08J 5/043: {with glass fibres} - C08K 3/013: Fillers, pigments or reinforcing additives - C08K 3/34: Silicon-containing compounds - C08K 3/346: {Clay} - C08K 3/40: Glass - C08K 7/02: Fibres or whiskers - C08K 7/20: Glass - C08K 13/04: Ingredients characterised by their shape and organic or inorganic ingredients - C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers - C08L 67/03: the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings - C08G 63/605: {the hydroxy and carboxylic groups being bound to aromatic rings} - C08J 2367/04: Polyesters derived from hydroxy carboxylic acids, e.g. lactones (C08J2367/06 takes precedence) - C08J 2467/04: Polyesters derived from hydroxy carboxylic acids, e.g. lactones (C08J2467/06 takes precedence) - C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure - C08L 2205/12: containing additives being liquid crystalline or anisotropic in the melt - C09K 2019/521: {Inorganic solid particles} - Y02W 30/62: Plastics recycling; Rubber recycling - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract A liquid crystal polyester resin composition containing 100 parts by mass of a liquid crystal polyester resin; and at least 10 parts by mass and at most 100 parts by mass of glass components; wherein the glass components contain glass fibers having a length of more than 30 μm and glass fine powders having a length of at least 4 μm and at most 30 μm; the number-average fiber length of the glass fibers is at least 50 μm and at most 200 μm; and the content of the fine powders is at least 50% and at most 95% relative to a total number of the glass components. ## Claims ### Claim 1 A liquid crystal polyester resin composition comprising: 100 parts by mass of a liquid crystal polyester resin; and at least 10 parts by mass and at most 100 parts by mass of glass components; wherein the glass components contain glass fibers having a length of more than 30 μm and glass fine powders having a length of at least 4 μm and at most 30 μm; the number-average fiber length of the glass fibers is at least 50 μm and at most 200 μm; and the content of the fine powders is at least 50% and at most 95% relative to a total number of the glass components. ### Claim 2 (depends on 1) The liquid crystal polyester resin composition according to claim 1, wherein: the fine powders are composed of first fine powders having a length of at least 4 μm and at most 20 μm, and second fine powders having a length of more than 20 μm and at most 30 μm; and the content of the first fine powders is at least 40% and at most 70% relative to the total number of the glass components. ### Claim 3 (depends on 1) The liquid crystal polyester resin composition according to claim 1, wherein the content of the fine powders is at least 50% and at most 85% relative to the total number of the glass components. ### Claim 4 (depends on 1) The liquid crystal polyester resin composition according to claim 1, wherein the liquid crystal polyester resin contains repeating units represented by formulas (1) to (3) below: —O—Ar1—CO— (1) —CO—Ar2—CO— (2) —X—Ar3—Y— (3) wherein Ar1 represents a phenylene group, a naphthylene group or a biphenylylene group; Ar2 and Ar3 represent, independently of each other, a phenylene group, a naphthylene group, a biphenylylene group or a group represented by formula (4) below; X and Y represent, independently of each other, an oxygen atom or an imino group (—NH—); and at least one hydrogen atom in the group represented by Ar, Ar2 or Ar3 may, each independently, be substituted by a halogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 20 carbon atoms; —Ar4—Z—Ar5— (4) wherein Ar4 and Ar5 represent, independently of each other, a phenylene group or a naphthylene group; Z represents an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group or an alkylidene group having 1 to 10 carbon atoms; and at least one hydrogen atom in the group represented by Ar4 or Ar may, each independently, be substituted by a halogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 20 carbon atoms. ### Claim 5 (depends on 4) The liquid crystal polyester resin composition according to claim 4, wherein Ar1 is a 1,4-phenylene group, Ar2 is a 1,4-phenylene group and a 1,3-phenylene group, Ar3 is a biphenylylene group, and X and Y are each oxygen atoms. ### Claim 6 (depends on 4) The liquid crystal polyester resin composition according to claim 4, wherein: a molar ratio (3)/(1) between repeating units represented by formula (1) and repeating units represented by formula (3) is at least 0.2 and at most 1.0; and a molar ratio (2)/(3) between repeating units represented by formula (3) and repeating units represented by formula (2) is at least 0.9 and at most 1.1. ### Claim 7 (depends on 1) The liquid crystal polyester resin composition according to claim 1, wherein a molar ratio y/x between repeating units represented by formula (2) is greater than 0 and at most 1, wherein: x represents a molar content of repeating units in which Ar2 is a 1,4-phenylene group; and y represents a molar content of repeating units in which Ar2 is a 1,3-phenylene group. ### Claim 8 (depends on 7) The liquid crystal polyester resin composition according to claim 7, wherein the liquid crystal polyester resin contains a first liquid crystal polyester resin and a second liquid crystal polyester resin, and α/β is at least 0.1 and at most 0.6, wherein: α represents the molar ratio y/x in the first liquid crystal polyester resin; and β represents the molar ratio y′/x′ in the second liquid crystal polyester resin. ### Claim 9 (depends on 1) A molded body formed from the liquid crystal polyester resin composition according to claim 1.