Thermoplastic Resin Composition and Molded Article Using Same

Patent metadata

Field	Value
Publication number	US-2022106482-A1
Application number	US-201917298102-A
Country	US
Kind code	A1
Filing date	Nov 27, 2019
Priority date	Nov 29, 2018
Publication date	Apr 7, 2022
Grant date	—

Abstract

The present invention relates to a thermoplastic resin composition and a molded article using same, the thermoplastic resin composition comprising: (D) 4 to 12 parts by weight of a methyl methacrylate-butadiene-styrene graft copolymer; (E) 0.1 to 0.3 parts by weight of a phosphate-based heat stabilizer; and (F) 25 to 35 parts by weight of an inorganic filler having an average particle diameter (D50) of 1 to 5 μm, with respect to 100 parts by weight of a basic resin including (A) 65 to 75 wt % of a polycarbonate, (B) 20 to 30 wt % of an aromatic vinyl-cyanized vinyl copolymer; and (C) 1 to 10 wt % of a polyethylene terephthalate resin.

First claim

1 . A thermoplastic resin composition, comprising
100 parts by weight of a base resin which comprises (A) 65 to 75 wt % of a polycarbonate resin; (B) 20 to 30 wt % of an aromatic vinyl-vinyl cyanide copolymer; and (C) 1 to 10 wt % of a polyethylene terephthalate resin, and (D) 4 to 12 parts by weight of a methyl methacrylate-butadiene-styrene graft copolymer; (E) 0.1 to 0.3 parts by weight of a phosphate-based heat stabilizer; and (F) 25 to 35 parts by weight of an inorganic filler having an average particle diameter (D50) of 1 to 5 μm based on 100 parts by weight of the base resin.

2 . The thermoplastic resin composition of claim 1 , wherein the (A) polycarbonate resin has a melt flow index of 15 to 25 g/10 min measured under the condition of 300° C. and 1.2 kg load according to ASTM D1238.

3 . The thermoplastic resin composition of claim 1 , wherein the (B) aromatic vinyl-vinyl cyanide copolymer is a copolymer of a monomer mixture including 60 to 80 wt % of an aromatic vinyl compound and 20 to 40 wt % of a vinyl cyanide compound.

4 . The thermoplastic resin composition of claim 1 , wherein the (B) aromatic vinyl-vinyl cyanide copolymer has a weight average molecular weight of 80,000 to 200,000 g/mol.

5 . The thermoplastic resin composition of claim 1 , wherein the (B) aromatic vinyl-vinyl cyanide copolymer is a styrene-acrylonitrile copolymer.

6 . The thermoplastic resin composition of claim 1 , wherein the (C) polyethylene terephthalate resin has an intrinsic viscosity measured according to ASTM D2857 of less than or equal to 1.0 dl/g.

7 . The thermoplastic resin composition of claim 1 , wherein the (D) methyl methacrylate-butadiene-styrene graft copolymer comprises 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.

8 . The thermoplastic resin composition of claim 7 , wherein the (D) butadiene-based rubbery polymer of the (D) methyl methacrylate-butadiene-styrene graft copolymer has an average particle diameter of 100 to 400 nm.

9 . The thermoplastic resin composition of claim 1 , wherein the (E) phosphate-based heat stabilizer comprises dihydrogen phosphate, stearyl phosphate, trimethyl phosphate, triethyl phosphate, triphenyl phosphate, or a combination thereof.

10 . The thermoplastic resin composition of claim 1 , wherein the (F) inorganic filler comprises montmorillonite, talc, kaolin, zeolite, vermiculite, aluminum oxide, silica, magnesium hydroxide, aluminum hydroxide, glass flakes, or a combination thereof.

11 . 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 antibacterial agent, a release agent, an antioxidant, an ultraviolet stabilizer, an antistatic agent, a pigment, and a dye.

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

Assignees

• Lotte Chemical Corp

Inventors

• Kim Myunghun
• Kwon Keehae
• Hong Jaekeun

Classifications

• C08L69/00 Primary

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

• C08L25/12

  with unsaturated nitriles · CPC title

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C08L2201/08

  Stabilised against heat, light or radiation or oxydation · CPC title

• C08K2201/005

  Additives being defined by their particle size in general · CPC title