Thermoplastic resin composition

Patent metadata

Field	Value
Publication number	US-11898029-B2
Application number	US-202017275142-A
Country	US
Kind code	B2
Filing date	Jun 4, 2020
Priority date	Jun 13, 2019
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

Provided is a thermoplastic resin composition which includes: a base resin including, in a weight ratio of 70:30 to 90:10, a first copolymer formed by graft polymerization of a diene-based rubber polymer having an average particle diameter of 50 to 200 nm with a first monomer mixture including an alkyl(meth)acrylate-based monomer and an aromatic vinyl-based monomer and a second copolymer which is a copolymer of a second monomer mixture including an alkyl(meth)acrylate-based monomer and an aromatic vinyl-based monomer; and a plasticizer.

First claim

The invention claimed is:

1. A thermoplastic resin molded article made of a thermoplastic resin composition comprising:
a base resin including, in a weight ratio of 70:30 to 90:10, a first copolymer formed by graft polymerization of a diene-based rubber polymer having an average particle diameter of 50 to 200 nm with a first monomer mixture including an alkyl (meth)acrylate-based monomer and an aromatic vinyl-based monomer and a second copolymer which is a copolymer of a second monomer mixture including an alkyl (meth)acrylate-based monomer and an aromatic vinyl-based monomer; and
a plasticizer,
wherein the base resin is included in an amount of 100 parts by weight, and the plasticizer is included in an amount of 4 to 10 parts by weight, and
wherein the thermoplastic resin molded article has a haze of 2.0% or less, a flexural strength of 280 to 420 kg/cm 2 , and a flexural modulus of 11,000 to 13,500 kg/cm 2 .

2. The thermoplastic resin molded article of claim 1 , wherein the plasticizer is a polyester-based plasticizer.

3. The thermoplastic resin molded article of claim 1 , wherein the plasticizer has a viscosity of 1,500 to 5,000 cps.

4. The thermoplastic resin molded article of claim 1 , wherein the plasticizer is one or more selected from the group consisting of: polydi(2-ethylhexyl)glycoladipate; hexanedioic acid, polymer with 1,3-butanediol, 2-ethylhexyl ester; hexanedioic acid, polymer with 1,3-butanediol and 1,2-propanediol, 2-ethylhexyl ester; and hexanedioic acid, polymer with 2,2-dimethyl-1,3-propanediol and 1,2-propanediol, isononyl ester.

5. The thermoplastic resin molded article of claim 1 , wherein the plasticizer has a refractive index of 1.45 to 1.6.

6. The thermoplastic resin molded article of claim 1 , wherein the refractive indices of the first copolymer and the second copolymer differ by 0.01 or less.

7. The thermoplastic resin molded article of claim 1 , wherein each of the first and second monomer mixtures further includes a vinyl cyanide-based monomer.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Roo Da
• Choi Jeong Su
• Lee Won Seok
• Park Sang Hoo
• Lee Jong Ju

Classifications

• C08L51/04 Primary

  grafted on to rubbers · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08L2205/06

  having improved processability or containing aids for moulding methods · CPC title

• C08F285/00 Primary

  Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers · CPC title

• C08L55/02 Primary

  ABS [Acrylonitrile-Butadiene-Styrene] polymers · CPC title