# US 11,306,252 B2 · Liquid crystal polyester resin composition and injection molded body

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,306,252 B2
- Document ID: US11306252B2
- Status: Granted
- Kind: B2
- Application number: 16/755,873
- Filed: 2018-10-26
- Published: 2020-09-24
- Granted: 2022-04-19
- Earliest claimed: 2017-10-31
- Assignees: Sumitomo Chemical Company, Limited
- Applicants: Sumitomo Chemical Company, Limited
- Inventors: Shintaro Komatsu
- Web page: https://patentgrep.com/patent/US11306252B2

## CPC

- C09K 19/3809: {Polyesters; Polyester derivatives, e.g. polyamides}
- B29B 7/007: {for continuous mixing}
- B29B 7/726: {Measuring properties of mixture, e.g. temperature or density (B29B7/724 takes precedence)}
- B29B 7/90: Fillers or reinforcements {, e.g. fibres}
- B29B 7/94: Liquid charges
- B29B 9/12: characterised by structure or composition
- B29B 9/14: fibre-reinforced
- B29C 45/0001: {characterised by the choice of material}
- B29C 48/0022: {combined with cutting}
- B29C 48/40: using two or more parallel screws {or at least two parallel non-intermeshing screws}, e.g. twin screw extruders
- B29C 48/92: Measuring, controlling or regulating
- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C09K 19/52: characterised by components which are not liquid crystals, e.g. additives {with special physical aspect: solvents, solid particles}
- B29B 9/06: in the form of filamentary material, e.g. combined with extrusion
- B29K 2067/04: {Polyesters derived from hydroxycarboxylic acids}
- C08K 3/045: {Fullerenes}
- C08K 7/06: Elements
- C08K 9/12: Adsorbed ingredients {, e.g. ingredients on carriers}
- C09K 2019/521: {Inorganic solid particles}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A liquid crystal polyester resin composition including a liquid crystal polyester resin, 15 parts by mass or more and 100 parts by mass or less of a carbon fiber with respect to 100 parts by mass of the liquid crystal polyester resin, and 0.001 parts by mass or more and 0.02 parts by mass or less of a fullerene with respect to 100 parts by mass of the carbon fiber.

## Claims

### Claim 1

A liquid crystal polyester resin composition comprising:
a liquid crystal polyester resin;
15 parts by mass or more and 100 parts by mass or less of a carbon fiber with respect to 100 parts by mass of the liquid crystal polyester resin; and
0.001 parts by mass or more and 0.02 parts by mass or less of a fullerene with respect to 100 parts by mass of the carbon fiber,
wherein the fullerene is adsorbed onto the carbon fiber.

### Claim 2 (depends on 1)

The liquid crystal polyester resin composition according to claim 1,
wherein the fullerene has a fullerene structure containing a fullerene skeleton, and the fullerene is a mixture of a fullerene having 60 carbon atoms in the skeleton portion, a fullerene having 70 carbon atoms in the skeleton portion, and a higher fullerene having more than 70 carbon atoms in the skeleton portion.

### Claim 3 (depends on 2)

The liquid crystal polyester resin composition according to claim 2,
wherein a content of the fullerene having 60 carbon atoms with respect to the total mass of the fullerene is 50% by mass or more and 90% by mass or less.

### Claim 4 (depends on 1)

The liquid crystal polyester resin composition according to claim 1, wherein the fullerene comprises an unsubstituted fullerene.

### Claim 5 (depends on 1)

An injection molded body formed from the liquid crystal polyester resin composition according to claim 1.

### Claim 6 (depends on 1)

The liquid crystal polyester resin composition according to claim 1, wherein the carbon fiber is a carbon fiber bundle in which a plurality of single fibers are bundled, and a number of fibers bundled in the carbon fiber bundle is 3,000 or more and 60,000 or less.