# US 2022/0033622 A1 · Resin composition and resin molded article

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- Number: US 2022/0033622 A1
- Document ID: US20220033622A1
- Status: Published application
- Kind: A1
- Application number: 17/450,237
- Filed: 2021-10-07
- Published: 2022-02-03
- Earliest claimed: 2018-08-31
- Assignees: Eastman Chemical Company
- Applicants: Eastman Chemical Company
- Inventors: Ryo Tanaka; Kana Miyazaki; Kenji Yao
- Web page: https://patentgrep.com/patent/US20220033622A1

## CPC

- C08L 1/14: Mixed esters, e.g. cellulose acetate-butyrate
- C08L 1/12: Cellulose acetate
- B29C 45/0001: {characterised by the choice of material}
- B29K 2001/12: {Cellulose acetate}
- B29K 2105/06: containing reinforcements, fillers or inserts
- 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 2205/03: containing three or more polymers in a blend
- C08L 2205/035: containing four or more polymers in a blend
- C08L 2205/16: Fibres; Fibrils
- C08L 2207/53: Core-shell polymer
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- 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)
- 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

## Abstract

Provided is a resin composition containing: a cellulose acylate (A); a thermoplastic elastomer (B); and a fiber (C).

## Claims

### Claim 1

A resin composition comprising:
(I) a cellulose acylate (A) which is a cellulose acetate;
(II) a thermoplastic elastomer (B) wherein the thermoplastic elastomer (B) includes at least one selected from the group consisting of:
(1) a polymer (b1) having a core-shell structure including a core layer and a shell layer containing a polymer of an alkyl (meth)acrylate on a surface of the core layer,
(2) an olefin polymer (b2) being a polymer of an α-olefin and an alkyl (meth)acrylate, the olefin polymer (b2) containing 60 mass % or more of a structural unit derived from the α-olefin,
(3) a polymer (b3) having core-shell structure including a core layer containing a butadiene polymer, and a shell layer containing a polymer selected from a styrene polymer or an acrylonitrile-styrene polymer on a surface of the core layer,
(4) a styrene-ethylene-butadiene-styrene copolymer (b4),
(5) a polyurethane (b5); and
(6) a polyester (b6); and
(III) a fiber (C) chosen from a cellulose fiber, a kenaf fiber, a glass fiber, a carbon fiber, a polyester fiber, a polyamide fiber, an aramid fiber, a polyurethane fiber, an acrylic fiber, a vinylon fiber, a polyethylene fiber, or combinations thereof, wherein the fiber (C) has an average fiber length from 1 to 10 mm.

### Claim 2 (depends on 1)

The resin composition according to claim 1, wherein the fiber (C) contains a fiber having a hydroxy group on a surface of the fiber.

### Claim 3 (depends on 1)

The resin composition according to claim 1, wherein the fiber (C) contains at least one selected from the group consisting of a glass fiber and a cellulose fiber.

### Claim 4 (depends on 1)

The resin composition according to claim 1, wherein a content of the cellulose acylate (A), a content of the thermoplastic elastomer (B), and a content of the fiber (C) satisfy a relationship 0.03≤(C)/{(A)+(B)+(C)}≤0.5 in terms of mass.

### Claim 5 (depends on 1)

The resin composition according to claim 1, wherein the content of the cellulose acylate (A) and the content of the thermoplastic elastomer (B) satisfy a relationship 0.03≤(B)/{(A)+(B)}≤0.3 in terms of mass.

### Claim 6 (depends on 1)

The resin composition according to claim 1, further comprising a cardanol compound (D).

### Claim 7 (depends on 6)

The resin composition according to claim 6, wherein the cardanol compound (D) contains a cardanol compound having a molecular weight of 500 or less.

### Claim 8 (depends on 6)

The resin composition according to claim 6, wherein the content of the cellulose acylate (A) and a content of the cardanol compound (D) satisfy a relationship 0.02≤(D)/{(A)+(D)}≤0.2 in terms of mass.

### Claim 9 (depends on 1)

A resin molded article comprising the resin composition according to claim 1.

### Claim 10 (depends on 11)

The resin molded article according to claim 11, being an injection molding article.

### Claim 11 (depends on 11)

The resin molded article according to claim 11, having a tensile elastic modulus of 2500 MPa or more.

### Claim 12 (depends on 9)

The resin molded article according to claim 9, wherein the resin molded article is a housing of an electronic device or a home electronic applicance, an interior part for automobiles, a block building toy, a plastic model kit, a storage case for a CD-ROM or DVD, a dishware, a beverage bottle, a food tray, a wrapping material, a film, or a sheet.