# US 10,767,039 B2 · Thermoplastic resin composition

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- Number: US 10,767,039 B2
- Document ID: US10767039B2
- Status: Granted
- Kind: B2
- Application number: 16/286,490
- Filed: 2019-02-26
- Published: 2019-06-27
- Granted: 2020-09-08
- Earliest claimed: 2016-12-09
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Dong Kun Shin; Seo Hwa Kim; Byoung Il Kang; Chang Hun Han
- Web page: https://patentgrep.com/patent/US10767039B2

## CPC

- C08L 51/06: grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
- C08F 255/02: on to polymers of olefins having two or three carbon atoms
- C08F 255/026: {on to ethylene-vinylester copolymers}
- C08F 279/04: Vinyl aromatic monomers and nitriles as the only monomers
- C08L 23/08: Copolymers of ethene (C08L23/16 takes precedence)
- C08L 25/12: with unsaturated nitriles
- C08L 51/04: grafted on to rubbers
- C08L 53/00: Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L 53/005: {Modified block copolymers}
- C08L 55/02: ABS [Acrylonitrile-Butadiene-Styrene] polymers
- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08L 67/03: the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
- C08L 23/0869: with unsaturated acids, e.g. [meth]acrylic acid; with unsaturated esters, e.g. [meth]acrylic acid esters
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2205/035: containing four or more polymers in a blend
- C08L 2207/04: Thermoplastic elastomer
- 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)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

The present invention provides a thermoplastic resin and a molded article using the same, wherein the thermoplastic resin comprises: (A) 10 parts by weight to less than 30 parts by weight of a butadiene-based graft copolymer; (B) 5 parts by weight or more to less than 30 parts by weight of an acrylate-based graft copolymer; (C) 35 parts by weight to 65 parts by weight of a vinyl cyanide-aromatic vinyl-based copolymer; (D) 1 part by weight to 10 parts by weight of an ethylene-alkyl acrylate-based copolymer elastomer based on the total 100 parts by weight of (A), (B), and (C); and (E) 1 part by weight to 10 parts by weight of a polyester-based elastomer.

## Claims

### Claim 1

A resin composition comprising:
(A) 10 parts by weight to less than 30 parts by weight of a butadiene-based graft copolymer including 30 wt % to 70 wt % of a butadiene-based rubber polymer core, and 30 wt % to 70 wt % of a graft shell having a vinyl cyanide monomer-derived unit and an aromatic vinyl monomer-derived unit;
(B) 5 parts by weight or more to less than 30 parts by weight of an acrylate-based graft copolymer including 30 wt % to 70 wt % of an acrylate-based rubber polymer core, and 30 wt % to 70 wt % of a graft shell having a vinyl cyanide monomer-derived unit and an aromatic vinyl monomer-derived unit;
(C) 35 parts by weight to 65 parts by weight of a vinyl cyanide-aromatic vinyl-based copolymer;
(D) 1 part by weight to 10 parts by weight of an ethylene-alkyl acrylate-based copolymer elastomer based on the total 100 parts by weight of (A), (B), and (C); and
(E) 1 part by weight to 10 parts by weight of a polyester-based elastomer.

### Claim 2 (depends on 1)

The resin composition of claim 1, wherein the ethylene-alkyl acrylate-based copolymer elastomer comprises one or more selected from the group consisting of an ethylene methylacrylate copolymer, an ethylene ethylacrylate copolymer, and an ethylene butylacrylate copolymer.

### Claim 3 (depends on 1)

The resin composition of claim 1, wherein the resin composition comprises the polyester-based elastomer (E) and the ethylene-alkyl acrylate-based copolymer elastomer (D) in a weight ratio of 1:1 to 1:10.

### Claim 4 (depends on 1)

The resin composition of claim 1, wherein the resin composition comprises the polyester-based elastomer (E) and the ethylene-alkyl acrylate-based copolymer elastomer (D) in a weight ratio of 1:1 to 1:3.

### Claim 5 (depends on 1)

The resin composition of claim 1, wherein the resin composition comprises 1 part by weight to 10 parts by weight of a mixture of the polyester-based elastomer (E) and the ethylene-alkyl acrylate-based copolymer elastomer (D) based on the total 100 parts by weight of (A), (B), and (C).

### Claim 6 (depends on 1)

The resin composition of claim 1, wherein the polyester-based elastomer is a thermoplastic copolymer in which a crystalline hard segment (i) and a soft segment (ii) are block copolymerized.

### Claim 7 (depends on 6)

The resin composition of claim 6, wherein the polyester-based elastomer comprises the crystalline hard segment (i) and the soft segment (ii) in a weight ratio of 10: 90 to 50:50.

### Claim 8 (depends on 6)

The resin composition of claim 6, wherein the crystalline hard segment comprises polybutylterephthalate, and the soft segment comprises polytetramethyleneoxide glycol.

### Claim 9 (depends on 1)

The resin composition of claim 1, wherein the butadiene-based graft copolymer has an average particle diameter (D50) of 0.2 μm to 0.4 μm, and the acrylate-based graft copolymer has an average particle diameter (D50) of 0.3 μm to 0.5 μm.

### Claim 10 (depends on 1)

The resin composition of claim 1, wherein the vinyl cyanide-aromatic vinyl-based copolymer (C) comprises at least one of:
(c1) a vinyl cyanide-aromatic vinyl-based copolymer including 25 wt % to 40 wt % of a vinyl cyanide monomer-derived unit and having a weight average molecular weight of 50,000 g/mol to 150,000 g/mol; and
(c2) a vinyl cyanide-aromatic vinyl-based copolymer including 20 wt % to 30 wt % of a vinyl cyanide monomer-derived unit and having a weight average molecular weight of 150,000 g/mol to 1,000,000 g/mol.

### Claim 11 (depends on 1)

A thermoplastic resin prepared using the resin composition of claim 1 having:
a tensile strength in a machine direction(MD) of 360 kgf/cm2 or more as measured according to ASTM D638 (50 mm/min),
a TE retention rate (MD) of 60% or more before and after the ESCR test,
a TE retention rate (TD) of 40% or more before and after the ESCR test,
a surface gloss of 70% or more measured at an angle of 60° according to ASTM D2457, and
a low-temperature IZOD impact strength of 14.5 kgf·cm/cm or more measured according to ASTM D256.

### Claim 12 (depends on 11)

The thermoplastic resin of claim 11, wherein the thermoplastic resin has:
a tensile strength in a machine direction (MD) of 380 to 450 kgf/cm2 as measured according to ASTM D638 (50 mm/min),
a TE retention rate (MD) of 80% or more before and after the ESCR test,
a TE retention rate (TD) of 50% or more before and after the ESCR test,
a surface gloss of 80% or more measured at an angle of 60° according to ASTM D2457, and
a low-temperature IZOD impact strength of 15.0 kgf·cm/cm to 20.0 kgf·cm/cm as measured according to ASTM D256.