Thermoplastic Resin Composition and Molded Product Using Same

Patent metadata

Field	Value
Publication number	US-2022356344-A1
Application number	US-202017620877-A
Country	US
Kind code	A1
Filing date	Jun 26, 2020
Priority date	Jun 28, 2019
Publication date	Nov 10, 2022
Grant date	—

Abstract

The present invention relates to a thermoplastic resin composition and a molded product using same, the thermoplastic resin composition including 100 parts by weight of a base resin including: (A) 65 to 75 wt % of a polycarbonate resin; (B) 20 to 30 wt % of a polybutyleneterephthalate resin; and (C) 3 to 7 wt % of a polyethylene terephthalate resin, (D) 3 to 7 parts by weight of a methyl methacrylate-butadiene-styrene graft copolymer, and (E) 1 to 5 parts by weight of a polyolefin-based polymer having a glycidyl group.

First claim

1 . A thermoplastic resin composition, comprising
100 parts by weight of a base resin comprising: (A) 65 to 75 wt % of a polycarbonate resin, (B) 20 to 30 wt % of a polybutylene terephthalate resin, and (C) 3 to 7 wt % of a polyethylene terephthalate resin; (D) 3 to 7 parts by weight of a methyl methacrylate-butadiene-styrene graft copolymer; and (E) 1 to 5 parts by weight of a polyolefin-based polymer having a glycidyl group.

2 . The thermoplastic resin composition of claim 1 , wherein
the (E) polyolefin-based polymer having the glycidyl group comprises a homopolymer of an olefin having a glycidyl group, a copolymer of an unsaturated monomer having a glycidyl group and an olefin, or a combination thereof.

3 . The thermoplastic resin composition of claim 2 , wherein the olefin comprises ethylene, propylene, 1-butene, isobutylene, 2-butene, cyclobutene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 3-methyl-1-butene, 4-methyl-1-butene, cyclopentene, 1-hexene, cyclohexene, 1-octene, 1-decene, 1-dodecene, or a combination thereof.

4 . The thermoplastic resin composition of claim 2 , wherein the unsaturated monomer having the glycidyl group comprises glycidyl(meth)acrylate, vinylglycidylether, allylglycidylether, methacrylglycidylether, 2-methylallylglycidylether, styrene-p-glycidylether, or a combination thereof.

5 . The thermoplastic resin composition of of claim 2 , wherein the (E) polyolefin-based polymer having the glycidyl group comprises an ethylene-glycidylmethacrylate copolymer.

6 . The thermoplastic resin composition of claim 1 , wherein the (A) polycarbonate resin has a melt flow index of 1 to 15 g/10 min, which is measured under the condition of 300° C. and a 1.2 kg load according to ASTM D1238.

7 . The thermoplastic resin composition of claim 1 , wherein the (B) polybutylene terephthalate resin has an intrinsic viscosity of 0.7 to 1.5 dl/g, which is measured according to ASTM D2857.

8 . The thermoplastic resin composition of claim 1 , wherein
the (D) methyl methacrylate-butadiene-styrene graft copolymer has a core-shell structure comprising a core composed of a butadiene-based rubbery polymer, and a shell formed by graft polymerization of methyl methacrylate and/or styrene on the core.

9 . The thermoplastic resin composition of claim 1 , which further comprises at least one additive selected from a flame retardant, a nucleating agent, a coupling agent, a glass fiber, a plasticizer, a lubricant, an inorganic filler, an antibacterial agent, a release agent, a heat stabilizer, an antioxidant, an ultraviolet stabilizer, an antistatic agent, a pigment, and a dye.

10 . A molded product using the thermoplastic resin composition of claim 1 .

11 . The molded product of claim 10 , wherein the molded product has notched Izod impact strength of greater than or equal to 45 kgf·cm/cm, which is measured at room temperature (23° C.) according to ASTM D256.

12 . The molded product of claim 10 , wherein the molded product has gloss of less than or equal to 50 GU, which is measured at an angle of 60 degrees according to ASTM D523.

13 . The molded product of claim 10 , wherein the molded product has a styrene emission amount of less than 30 ppm, which is measured using gas chromatography mass spectrometry (GC-MS) according to a Hyundai Motor Company MS300-55 standard.

Assignees

• Lotte Chemical Corp

Inventors

• Kim Myunghun
• Kwon Keehae
• Kim Younghyo

Classifications

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08L51/04

  grafted on to rubbers · CPC title

• C08L2203/30

  used for thermoforming · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L23/0884

  Epoxide-containing esters · CPC title