# US 10,501,622 B2 · Thermoplastic resin composition and molded article using the same

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

- Number: US 10,501,622 B2
- Document ID: US10501622B2
- Status: Granted
- Kind: B2
- Application number: 15/856,188
- Filed: 2017-12-28
- Published: 2018-07-05
- Granted: 2019-12-10
- Earliest claimed: 2016-12-30
- Assignees: Lotte Advanced Materials Co., Ltd.
- Applicants: Lotte Advanced Materials Co., Ltd.
- Inventors: Jungeun Park; Heeyun Jeong; Keehae Kwon
- Web page: https://patentgrep.com/patent/US10501622B2

## CPC

- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08L 2205/02: containing two or more polymers of the same C08L -group
- 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)

## Abstract

Disclosed are a thermoplastic resin composition including (A) a polyester resin, (B) a styrene-based copolymer, (C) a rubber modified vinyl-based graft copolymer, and (D) a glass fiber, wherein the polyester resin (A) includes (A-1) a polybutylene terephthalate resin having an intrinsic viscosity of less than or equal to about 1.1 dl/g and (A-2) a polyethylene terephthalate resin having an intrinsic viscosity of less than or equal to about 1.0 dl/g, and the glass fiber (D) includes (D-1) a first glass fiber having a length of about 2 mm to about 4 mm and (D-2) a second glass fiber having a length of about 10 μm to about 100 μm, and a molded article using the same.

## Claims

### Claim 1

A thermoplastic resin composition, comprising:
about 50 wt % to about 70 wt % of (A) a polyester resin comprising (A-1) a polybutylene terephthalate resin having an intrinsic viscosity of less than or equal to about 1.1 dl/g as measured according to ASTM D2857 and (A-2) a polyethylene terephthalate resin having an intrinsic viscosity of less than or equal to about 1.0 dl/g as measured according to ASTM D2857, wherein the polybutylene terephthalate resin (A-1) having an intrinsic viscosity of less than or equal to about 1.1 dl/g and the polyethylene terephthalate resin (A-2) having an intrinsic viscosity of less than or equal to about 1.0 dl/g are present in a weight ratio of about 1:1 to about 2:1,
about 5 wt % to about 15 wt % of (B) a styrene-based copolymer,
about 5 wt % to about 15 wt % of (C) a rubber modified vinyl-based graft copolymer, and
about 5 wt % to about 25 wt % of (D) a glass fiber comprising (D-1) a first glass fiber having a length of about 2 mm to about 4 mm and (D-2) a second glass fiber having a length of about 10 μm to about 100 μm.

### Claim 2 (depends on 1)

The thermoplastic resin composition of claim 1, wherein the polyester resin (A) has a weight average molecular weight of about 10,000 to about 80,000 g/mol.

### Claim 3 (depends on 1)

The thermoplastic resin composition of claim 1, wherein the glass fiber (D) includes the first glass fiber (D-1) and the second glass fiber (D-2) in a weight ratio of about 1:1 to about 3:1.

### Claim 4 (depends on 1)

The thermoplastic resin composition of claim 1, wherein the thermoplastic resin composition further includes an inorganic filler.

### Claim 5 (depends on 4)

The thermoplastic resin composition of claim 4, wherein the inorganic filler includes alumina, amorphous silica, anhydrous aluminum silicate, mica, feldspar, clay, talc, a glass flake, a glass microsphere, wollastonite, a titanium dioxide, a zinc oxide or a combination thereof.

### Claim 6 (depends on 1)

A molded article using the thermoplastic resin composition of claim 1.

### Claim 7 (depends on 1)

The thermoplastic resin composition of claim 1, comprising about 5 wt % to about 20 wt % of (D) the glass fiber comprising (D-1) the first glass fiber having a length of about 2 mm to about 4 mm and (D-2) the second glass fiber having a length of about 10 μm to about 100 μm.

### Claim 8 (depends on 1)

The thermoplastic resin composition of claim 1, wherein (D) the glass fiber is selected from the group consisting of both (D-1) the first glass fiber having a length of about 2 mm to about 4 mm and (D-2) the second glass fiber having a length of about 10 μm to about 100 μm.