Thermoplastic resin composition providing superior low-gloss characteristic, weather resistance, and mechanical properties and extruded article manufactured from the same

• US 10,351,699 B2
• Filed: 11/10/2016
• Issued: 07/16/2019
• Est. Priority Date: 11/10/2015
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Park, Chun Ho, Hwang, Yong Yeon, Oh, Hyun Taek, Kim, Min Jung, Lee, Sang Mi, Lee, Yeong Min, Kang, Eun Soo
• Primary Examiner(s): Peng, Kuo Liang
• Application Number:
  US15/533,362
• Publication Number:
  US 20180265687A1
• Time in Patent Office: 978 Days
• CPC Class Codes: C08F 212/10 with nitriles
• CPC Class Codes: C08F 265/04 on to polymers of esters
• CPC Class Codes: C08F 279/04 Vinyl aromatic monomers and nitriles as the only monomers
• CPC Class Codes: C08J 5/00 Manufacture of articles or shaped materials containing macromolecular substances manufacture of semi-permeable membranes B01D67/00 - B01D71/00
• CPC Class Codes: C08L 2201/02 Flame or fire retardant/resistant
• CPC Class Codes: C08L 2201/08 Stabilised against heat, light or radiation or oxydation
• CPC Class Codes: C08L 2203/20 use in electrical or conductive gadgets
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2205/025 containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
• CPC Class Codes: C08L 2205/035 containing four or more polymers in a blend
• CPC Class Codes: C08L 2207/04 Thermoplastic elastomer
• CPC Class Codes: C08L 25/12 with unsaturated nitriles
• CPC Class Codes: C08L 25/16 Homopolymers or copolymers of alkyl-substituted styrenes
• CPC Class Codes: C08L 35/06 Copolymers with vinyl aromatic monomers
• CPC Class Codes: C08L 51/04 grafted on to rubbers
• CPC Class Codes: C08L 51/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: C08L 55/02 ABS [Acrylonitrile-Butadiene-Styrene] polymers

Abstract

The present disclosure relates to a thermoplastic resin composition providing superior low-gloss characteristic, weather resistance, and mechanical properties and an extruded article manufactured from the same. More particularly, the present invention relates to a thermoplastic resin composition including 40 to 70% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer as a matrix resin; 20 to 40% by weight of an acrylic graft copolymer (a) in which 46 to 95% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer is grafted to 5 to 54% by weight of a (meth)acrylate-based rubbery polymer having an average particle diameter of 0.05 to 1 μm; 1 to 10% by weight of an acrylic graft copolymer (b) in which 5 to 45% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer is grafted to 55 to 95 % by weight of a (meth)acrylate-based rubbery polymer having an average particle diameter of 0.05 to 1 μm; and 1 to 20% by weight of a large-diameter diene-based graft copolymer (c) in which 80 to 95% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer is grafted to 5 to 20% by weight of a diene-based rubbery polymer having an average particle diameter of 1 to 20 μm, and thus, providing superior low-gloss characteristic, weather resistance, and mechanical properties, and an extruded article manufactured from the same.

Claims

1. A thermoplastic resin composition, comprising:

40 to 70% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer as a matrix resin;

20 to 40% by weight of an acrylic graft copolymer (a) in which 46 to 95% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer is grafted to 5 to 54% by weight of a (meth)acrylate-based rubbery polymer having an average particle diameter of 0.05 to 1 μ

m;

1 to 10% by weight of an acrylic graft copolymer (b) in which 5 to 45% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer is grafted to 55 to 95% by weight of a (meth)acrylate-based rubbery polymer having an average particle diameter of 0.05 to 1 μ

m; and

1 to 20% by weight of a large-diameter diene-based graft copolymer (c) in which 80 to 95% by weight of an aromatic vinyl compound-vinyl cyan compound copolymer is grafted to 5 to 20% by weight of a diene-based rubbery polymer having an average particle diameter of 1 to 20 μ

m.

2. The thermoplastic resin composition according to claim 1, wherein the (meth)acrylate-based rubber is a C₂ to C₈ alkyl(meth)acrylate polymer.

3. The thermoplastic resin composition according to claim 1, wherein the diene-based rubbery polymer is one or more selected from the group consisting of a butadiene rubbery polymer, a butadiene-styrene rubbery polymer, and an isoprene rubbery polymer.

4. The thermoplastic resin composition according to claim 1, wherein the aromatic vinyl compound-vinyl cyan compound copolymer, as a matrix resin, is a bulk polymerization polymer comprising 60 to 90% by weight of an aromatic vinyl compound and 10 to 40% by weight of a vinyl cyan compound.

5. The thermoplastic resin composition according to claim 1, wherein the aromatic vinyl compound-vinyl cyan compound copolymer, as a matrix resin, has a weight average molecular weight of 80,000 to 250,000 g/mol.

6. The thermoplastic resin composition according to claim 1, wherein the aromatic vinyl compound is one or more selected from the group consisting of styrene, α

-methyl styrene, p-methyl styrene, 2,4-dimethyl styrene, and vinyl toluene.

7. The thermoplastic resin composition according to claim 1, wherein the vinyl cyan compound is one or more selected from the group consisting of acrylonitrile, methacrylonitrile, and ethacrylonitrile.

8. The thermoplastic resin composition according to claim 1, wherein the thermoplastic resin composition has a gloss of 22 to 38 measured according to ASTM D523.

9. The thermoplastic resin composition according to claim 1, wherein the thermoplastic resin composition further comprises one or more additives selected from the group consisting of a flame retardant, an antioxidant, an antistatic agent, an anti-dripping agent, a releasing agent, an antimicrobial agent, a heat stabilizer, a lubricant, a UV stabilizer, an impact modifier, a filler, an inorganic additive, a stabilizer, a pigment, and a dye.

10. An extruded article manufactured from the thermoplastic resin composition according to claim 1.

11. The extruded article according to claim 10, wherein the extruded article is an electric and electronic product, an automobile component, a building interior and exterior material, or a furniture interior and exterior material.