# US 2022/0033643 A1 · Thermoplastic Resin Composition and Molded Product Produced Therefrom

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- Number: US 2022/0033643 A1
- Document ID: US20220033643A1
- Status: Published application
- Kind: A1
- Application number: 17/276,215
- Filed: 2019-09-24
- Published: 2022-02-03
- Earliest claimed: 2018-09-28
- Assignees: Lotte Chemical Corporation
- Applicants: Lotte Chemical Corporation
- Inventors: Min Soo LEE; Eric ARIFIN; Seon Hui LEE; Bong Jae LEE; Sang Hyun HONG
- Web page: https://patentgrep.com/patent/US20220033643A1

## CPC

- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08J 5/04: Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08K 7/14: Glass
- 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 2205/035: 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)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A thermoplastic resin composition of the present invention comprises: about 100 parts by weight of a thermoplastic resin including a polyester resin; about 50-150 parts by weight of glass fibers; and about 1-10 parts by weight of a polyether-ester copolymer, wherein the polyether-ester copolymer has a melt volume flow rate (MVR) of about 30-120 cm3/10 min as measured under conditions of 230° C. and 2.16 kg based on ISO 1133. The thermoplastic resin composition is excellent in impact resistance, appearance characteristics, metal joining properties, and the like.

## Claims

### Claim 1

A thermoplastic resin composition comprising:
about 100 parts by weight of a thermoplastic resin comprising a polyester resin;
about 50 parts by weight to about 150 parts by weight of glass fibers; and
about 1 part by weight to about 10 parts by weight of a polyether-ester copolymer,
wherein the polyether-ester copolymer has a melt volume flow rate (MVR) of about 30 cm3/10 min to 120 cm3/10 min, as measured under conditions of 230° C. and 2.16 kg in accordance with ISO 1133.

### Claim 2 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the polyester resin comprises polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polytrimethylene terephthalate, and/or polycyclohexylenedimethylene terephthalate.

### Claim 3 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the polyester resin comprises about 20 wt % or less of polyethylene terephthalate and about 80 wt % or more of polybutylene terephthalate.

### Claim 4 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the thermoplastic resin comprises about 70 wt % or more of the polyester resin and about 30 wt % or less of a polycarbonate resin.

### Claim 5 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the glass fibers have a rectangular cross-section, an aspect ratio (long-side length/short-side length) of about 1.5 to about 10, and a short-side length of about 2 μm to about 10 μm.

### Claim 6 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the polyether-ester copolymer is a polymer of a reaction mixture comprising a C4 to C20 dicarboxylic acid, a C1 to C10 diol, and a poly(oxyalkylene)diol.

### Claim 7 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the glass fibers and the polyether-ester copolymer are present in a weight ratio of about 10:1 to about 50:1.

### Claim 8 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the thermoplastic resin composition has a dart drop height of about 65 to about 100 cm, at which cracks are generated on a 2.0 mm thick specimen when a 500 g dart is dropped thereon in a DuPont drop test.

### Claim 9 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein thermoplastic resin composition has a metal adhesion strength of about 35 MPa to about 55 MPa, as measured in accordance with ISO 19095.

### Claim 10 (depends on 1)

A molded product formed of the thermoplastic resin composition according to claim 1.