Resin composition

Patent metadata

Field	Value
Publication number	US-2024240008-A1
Application number	US-202318368964-A
Country	US
Kind code	A1
Filing date	Sep 15, 2023
Priority date	Jan 13, 2023
Publication date	Jul 18, 2024
Grant date	—

Abstract

The present disclosure relates to a resin composition and relates to a resin composition having excellent heat resistance and impact resistance and accomplishing the high degree of blackness.

First claim

1 . A resin composition comprising:
a graft copolymer; and a matrix copolymer, wherein the graft copolymer comprises:
a first graft copolymer comprising an acrylic polymer having an average particle diameter of 200 nm to 650 nm, an aromatic vinyl-based monomer unit and a vinylcyan-based monomer unit; and
a second graft copolymer comprising an acrylic polymer having an average particle diameter of 50 nm to 100 nm, an aromatic vinyl-based monomer unit and a vinylcyan-based monomer unit,
the matrix copolymer comprises a first matrix copolymer comprising an alkyl-substituted aromatic vinyl-based monomer unit, an alkyl (meth)acrylate monomer unit, and a vinylcyan-based monomer unit, and the first graft copolymer is comprised in 1 part by weight to 15 parts by weight, the second graft copolymer is comprised in 16 parts by weight to 40 parts by weight, and the first matrix copolymer is comprised in 40 parts by weight to 70 parts by weight, based on 100 parts by weight of the graft copolymer and the matrix copolymer.

2 . The resin composition of claim 1 , wherein a refractive index difference between the second graft copolymer and the first matrix copolymer is 0.1 or less.

3 . The resin composition of claim 1 , wherein a refractive index difference between the second graft copolymer and the first matrix copolymer is 0.02 or less.

4 . The resin composition of claim 1 , wherein based on the weight of the first matrix copolymer itself, the first matrix copolymer comprises:
the alkyl-substituted aromatic vinyl-based monomer unit in 35 wt % to 40 wt %, the alkyl (meth)acrylate monomer unit in 40 wt % to 50 wt %, and the vinylcyan-based monomer unit in 17 wt % to 22 wt %.

5 . The resin composition of claim 4 , wherein the first matrix copolymer includes a copolymer of α-methylstyrene, methyl methacrylate, and acrylonitrile.

6 . The resin composition of claim 1 , wherein the matrix copolymer further comprises a second matrix copolymer comprising an alkyl-unsubstituted aromatic vinyl-based monomer unit, an alkyl (meth)acrylate monomer unit and a vinylcyan-based monomer unit.

7 . The resin composition of claim 6 , wherein the second matrix copolymer is comprised in 5 parts by weight to 30 parts by weight based on 100 parts by weight of the graft copolymer and the matrix copolymer.

8 . The resin composition of claim 7 , wherein the second matrix copolymer includes a copolymer of styrene, methyl methacrylate and acrylonitrile.

9 . The resin composition of claim 1 , further comprising a colorant.

10 . The resin composition of claim 9 , wherein the colorant comprises a mixture of anthraquinone and perinone.

11 . The resin composition of claim 1 , wherein the resin composition does not comprise an alkyl (meth)acrylate polymer.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Lg Chemical Ltd

Inventors

• Choi Min Jin
• Lee Choon Ho
• Jung Woo Chul
• Lee Kyoung Sil
• Ryu Hyun Jun
• Choi Suk Jo
• Lim Myoung Jun
• Kim Tae Hoon

Classifications

• C08L2201/08

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

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08L33/12 Primary

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C08K5/3447 Primary

  condensed with carbocyclic rings · CPC title