Thermoplastic resin composition and low-gloss molded article made therefrom

Patent metadata

Field	Value
Publication number	US-9856371-B2
Application number	US-201514747176-A
Country	US
Kind code	B2
Filing date	Jun 23, 2015
Priority date	Jun 27, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A thermoplastic resin composition includes (A) a graft rubber copolymer, (B) an aromatic vinyl-vinyl cyanide-based copolymer, and (C) a silicone-modified aromatic vinyl-vinyl cyanide-based copolymer. The silicone-modified aromatic vinyl-vinyl cyanide-based copolymer (C) has an average particle size of about 100 μm or less.

First claim

What is claimed is:

1. A thermoplastic resin composition comprising: (A) a rubber-modified graft copolymer, (B) an aromatic vinyl-vinyl cyanide-based copolymer, and (C) a silicone-modified aromatic vinyl-vinyl cyanide-based copolymer,
wherein (C) the silicone-modified aromatic vinyl-vinyl cyanide-based copolymer has an average particle size of about 20 μm to about 100 μm,
wherein a molded article comprising the thermoplastic resin composition has a melt-flow index of about 3 to about 30 g/10 min, as measured under conditions of a temperature of 220° C. and a load of 10 kg by an evaluation method according to ASTM D1238 and a gloss of about 70% or less, as measured at an angle of 60° by an evaluation method according to ASTM D523.

2. The thermoplastic resin composition of claim 1 , wherein (C) the silicone-modified aromatic vinyl-vinyl cyanide-based copolymer is cross-linked.

3. The thermoplastic resin composition of claim 1 , wherein (C) the silicone-modified aromatic vinyl-vinyl cyanide-based copolymer is a copolymer of a mixture of monomers comprising (C1) an aromatic vinyl-based monomer, (C2) an unsaturated nitrile-based monomer, and (C3) a cross-linkable monomer.

4. The thermoplastic resin composition of claim 3 , wherein (C) the silicone-modified aromatic vinyl-vinyl cyanide-based copolymer is the copolymer of the mixture of monomers comprising:
about 100 parts by weight of a mixture of monomers comprising (C1) the aromatic vinyl-based monomer in an amount of about 60 to about 80% by weight and (C2) the unsaturated nitrile-based monomer in an amount of about 20 to about 40% by weight; and
about 0.1 to about 20 parts by weight of (C3) the cross-linkable monomer, based on about 100 parts by weight of the mixture of monomers comprising (C1) the aromatic vinyl-based monomer and (C2) the unsaturated nitrile-based monomer.

5. The thermoplastic resin composition of claim 3 , wherein (C1) the aromatic vinyl-based monomer comprises styrene, α-methylstyrene, β-methylstyrene, p-methylstyrene, p-t-butyl styrene, ethyl styrene, vinylxylene, monochlorostyrene, di chl oro styrene, dibromostyrene, vinylnaphthalene, or a mixture thereof.

6. The thermoplastic resin composition of claim 3 , wherein (C2) the unsaturated nitrile-based monomer comprises acrylonitrile, methacrylonitrile, ethacrylonitrile, phenylacrylonitrile, a-chloroacrylonitrile, fumaronitrile, or a mixture thereof.

7. The thermoplastic resin composition of claim 3 , wherein (C3) the cross-linkable monomer comprises a compound or a mixture of compounds represented by the following Formula 1:

wherein l, m and n are the same or different and are each independently an integer ranging from 0 to 100, provided that l, m and n are not zero at the same time, and
R 1 R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are the same or different and are each independently hydrogen, a substituted or unsubstituted C 1 to C 30 alkyl group, a substituted or unsubstituted C 2 to C 30 alkenyl group, a substituted or unsubstituted C 2 to C 30 alkynyl group, a substituted or unsubstituted C 3 to C 30 cycloalkyl group, a substituted or unsubstituted C 6 to C 30 aryl group, a substituted or unsubstituted C 1 to C 30 heteroaryl group, a hydroxyl group, an alkoxy group, an amino group, an epoxy group, a carboxyl group, a halogen group, an ester group, an isocyanate group, or a mercapto group, provided that at least two of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 include a polymerizable unsaturated reactive group.

8. The thermoplastic resin composition of claim 3 , wherein (C3) the cross-linkable monomer comprises a compound or a mixture of compounds represented by the following Formula 2:

wherein R 9 , R 10 , R 11 , R 12 , R 13 and R 14 are the same or different and are each independently hydrogen, a substituted or unsubstituted C 1 to C 30 alkyl group, a substituted or unsubstituted C 2 to C 30 alkenyl group, a substituted or unsubstituted C 2 to C 30 alkynyl group, a substituted or unsubstituted C 3 to C 30 cycloalkyl group, a substituted or unsubstituted C 6 to C 30 aryl group, a substituted or unsubstituted C 1 to C 30 heteroaryl group, a hydroxyl group, an alkoxy group, an amino group, an epoxy group, a carboxyl group, a halogen group, an ester group, an isocyanate group, or a mercapto group, and
p is an integer ranging from 1 to 6, provided that at least two of R 9 , R 10 , R 11 , R 12 , R 13 , and R 14 include a polymerizable unsaturated reactive group.

9. The thermoplastic resin composition of claim 3 , wherein (C3) the cross-linkable monomer comprises 1,3,5-trimethyl-1,3,5-trivinyl-cyclotrisiloxane, 1,3,5,7-tetramethyl-1,3,5,7-tetravinyl-cyclotetrasiloxane, 1,3,5,7,9-pentamethyl-1,3,5,7,9-pentavinyl-cyclopentasiloxane, 1,3,5-triethyl-1,3,5-trivinyl-cyclotrisiloxane, 1,3,5,7-tetraethyl-1,3,5,7-tetravinyl-cyclotetrasiloxane, 1,3,5,7,9-pentaethyl-1,3,5,7,9-pentavinyl-cyclopentasiloxane, or a mixture thereof.

10. The thermoplastic resin composition of claim 1 , wherein (C) the silicone-modified aromatic vinyl-vinyl cyanide-based copolymer has an average particle size of about 20 μm to about 80 μm.

11. The thermoplastic resin composition of claim 1 , wherein the thermoplastic resin composition comprises (A) the rubber-modified graft copolymer in an amount of about 10 to about 40% by weight, (B) the aromatic vinyl-vinyl cyanide-based copolymer in an amount of about 20 to about 90% by weight, and (C) the silicone-modified aromatic vinyl-vinyl cyanide-based copolymer in an amount of about 1 to about 30% by weight.

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

Assignees

• Samsung Sdi Co Ltd
• Lotte Advanced Mat Co Ltd

Inventors

• Kim Bo Eun
• Jang Joo Hyun
• Heo Jae Won
• Park Kwang Soo
• Jung Yu Jin
• Jin Young Sub

Classifications

• C08L25/12 Primary

  with unsaturated nitriles · CPC title

• C08L2205/03

  containing three or more polymers in a blend · 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

• C08L55/02

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