# US 11,999,845 B2 · Thermoplastic resin composition and molded article thereof

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

- Number: US 11,999,845 B2
- Document ID: US11999845B2
- Status: Granted
- Kind: B2
- Application number: 17/762,219
- Filed: 2020-12-17
- Published: 2022-10-27
- Granted: 2024-06-04
- Earliest claimed: 2020-07-23
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Chun Ho Park; Tae Hoon Kim; Daeun Sung; Yong Hee An; Wangrae Joe; Ho Hoon Kim; Jeongmin Jang
- Web page: https://patentgrep.com/patent/US11999845B2

## CPC

- C08L 51/04: grafted on to rubbers
- C08L 77/06: Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence)
- C08J 5/18: Manufacture of films or sheets
- C08L 33/12: Homopolymers or copolymers of methyl methacrylate
- C08L 51/003: {grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C08L51/04, C08L51/06 take precedence)}
- C08F 220/14: Methyl esters {, e.g. methyl (meth)acrylate}
- C08J 2333/12: Homopolymers or copolymers of methyl methacrylate
- C08J 2351/00: Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J 2351/04: grafted on to rubbers
- C08J 2433/12: Homopolymers or copolymers of methyl methacrylate
- C08J 2451/00: Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- 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: 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)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

A thermoplastic resin composition and a molded article including the same are disclosed in which the thermoplastic resin composition includes 100 parts by weight of a base resin including an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer; and 0.5 to 10 parts by weight of a matting agent having a refractive index of 1.46 to 1.53, and a molded article including the thermoplastic resin composition, wherein the thermoplastic resin composition satisfies Equations 1 and 2 below: G≤20, [Equation 1] wherein G denotes the gloss of a sheet having a size of 0.15 T as measured at 60° using a gloss meter, Hz<Tt, [Equation 2] wherein Hz and Tt denote the haze (%) and total light transmittance (%) of a sheet having a size of 0.15 T, respectively.

## Claims

### Claim 1

A thermoplastic resin composition, comprising 100 parts by weight of a base resin comprising an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer; and from 0.5 to 10 parts by weight of a matting agent having a refractive index of from 1.46 to 1.53,
wherein the thermoplastic resin composition satisfies Equations 1 and 2 below:
G≤20, [Equation 1]
wherein G denotes a gloss of a sheet having a size of 0.15 T as measured at 60° using a gloss meter,
Hz<Tt, [Equation 2]
wherein Hz and Tt denote haze (%) and total light transmittance (%) of a sheet having a size of 0.15 T, respectively.

### Claim 2 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the thermoplastic resin composition has a readability (R) of from 1 to 1.4 as measured by Equation 3 below:
R=Rc/Ro, [Equation 3]
wherein Rc denotes an area of a brightness peak measured under conditions of width of number stroke: 2 mm, final light quantity: 14 lux, LED light source: 150 lm/W, distance between light source and sheet: contact, and sheet thickness: 0.15 T, and Ro denotes an area of a theoretical brightness peak without light leak.

### Claim 3 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the base resin comprises from 10 to 70% by weight of the acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer, and the base resin further comprises from 5 to 50% by weight of a polymethacrylate-based resin, and from 10 to 50% by weight of a methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer.

### Claim 4 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the total light transmittance (Tt) is from 80 to 95%, and the haze (Hz) is from 1 to 90%.

### Claim 5 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer comprises one or more selected from the group consisting of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (i) having a grafting degree of 40% or more and containing from 40 to 60% by weight of acrylate rubber having an average particle diameter of from 0.05 to 0.15 μm, an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (ii) having a grafting degree of less than 40% and containing from 40 to 60% by weight of acrylate rubber having an average particle diameter of from 0.05 to 0.15 μm, and an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (iii) containing from 40 to 60% by weight of acrylate rubber having an average particle diameter of from 0.33 to 0.5 μm.

### Claim 6 (depends on 5)

The thermoplastic resin composition according to claim 5, wherein, based on 100% by weight of the base resin, the acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (i) is present in an amount of from 30 to 60% by weight, the acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (ii) is present in an amount of from 35 to 65% by weight, and the acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (iii) is present in an amount of from 5 to 30% by weight.

### Claim 7 (depends on 3)

The thermoplastic resin composition according to claim 3, wherein the polymethacrylate-based resin comprises from 65 to 80% by weight of methacrylate and from 20 to 35% by weight of a vinyl cyanide compound.

### Claim 8 (depends on 3)

The thermoplastic resin composition according to claim 3, wherein the polymethacrylate-based resin has a weight average molecular weight of from 50,000 to 200,000 g/mol.

### Claim 9 (depends on 3)

The thermoplastic resin composition according to claim 3, wherein the polymethacrylate-based resin comprises one or more selected from the group consisting of a polymethacrylate-based resin (a) having a weight average molecular weight of from 30,000 to 90,000 g/mol, a polymethacrylate-based resin (b) having a weight average molecular weight of from 100,000 to 200,000 g/mol, and a polymethacrylate-based resin (c) having a weight average molecular weight of greater than 200,000 g/mol and less than or equal to 300,000 g/mol.

### Claim 10 (depends on 9)

The thermoplastic resin composition according to claim 9, wherein, based on 100% by weight of the base resin, the polymethacrylate-based resin (a) is present in an amount of from 5 to 30% by weight, the polymethacrylate-based resin (b) is present in an amount of from 5 to 30% by weight, and the polymethacrylate-based resin (c) is present in an amount of from 10 to 50% by weight.

### Claim 11 (depends on 3)

The thermoplastic resin composition according to claim 3, wherein the methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer comprises from 65 to 85% by weight of methacrylate, from 10 to 30% by weight of an aromatic vinyl compound, and from 5 to 10% by weight of a vinyl cyanide compound.

### Claim 12 (depends on 3)

The thermoplastic resin composition according to claim 3, wherein the methacrylate-aromatic vinyl compound-vinyl cyanide compound copolymer has a weight average molecular weight of from 80,000 to 200,000 g/mol.

### Claim 13 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the matting agent includes a polyamide resin having a refractive index of from 1.46 to 1.53.

### Claim 14 (depends on 1)

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

### Claim 15 (depends on 14)

The molded article according to claim 14, wherein the molded article is a film or sheet material for hidden displays.

### Claim 16 (depends on 15)

The molded article according to claim 15, wherein the film or the sheet has a thickness of from 0.05 to 0.5 T.