ASA GRAFT COPOLYMER COMPOSITION

• US 20140107276A1
• Filed: 02/01/2013
• Published: 04/17/2014
• Est. Priority Date: 02/03/2012
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Kim, Min Jung, Hwang, Yong Yeon, Park, Chun Ho, Han, Hye Kyung, Lee, Sang Mi
• Granted Patent: US 9,428,644 B2
• Time in Patent Office: Days
• US Class Current: 524/504
• CPC Class Codes: C08F 265/04 on to polymers of esters
• CPC Class Codes: C08L 27/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08L 51/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C08L51/04, C08L51/06 take precedence
• 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 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates

Abstract

Disclosed are an ASA graft copolymer having a structure including a seed which comprises at least one compound of an aromatic vinyl compound, a vinyl cyan compound and an alkyl (meth)acrylate compound, a core which surrounds the seed and comprises alkyl acrylate, and a shell which surrounds the core, comprises an aromatic vinyl compound, a vinyl cyan compound and a crosslinking agent, and having suitably controlled thicknesses and refractive indexes of the respective layers, and an ASA graft copolymer composition comprising the ASA graft copolymer.

Claims

1. An ASA graft copolymer composition comprising:

an ASA graft copolymer comprising a seed, a core and a shell; and

a matrix polymer,

wherein the ASA graft copolymer has a gel content higher than 85% and a swelling index lower than 8, a difference in refractive index (μ

D²⁵) between the seed of the ASA graft copolymer and the matrix polymer is lower than 0.06 and a difference in the refractive index (μ

D²⁵) between the core of the ASA graft copolymer and the matrix polymer is higher than 0.05.

2. The ASA graft copolymer according to claim 1, wherein a difference in refractive index (μ

D²⁵) between the shell and the matrix polymer is 0.05 or less.

3. The ASA graft copolymer according to claim 1, wherein the core has a thickness of 20 to 50 nm.

4. The ASA graft copolymer according to claim 1, wherein the core has a site of 150 to 350 nm.

5. The ASA graft copolymer according to claim 1, wherein the shell comprises a crosslinking agent.

6. The ASA graft copolymer according to claim 1, wherein the shell of the ASA graft copolymer comprises an aromatic vinyl compound, a vinyl cyan compound and a crosslinking agent.

7. The ASA graft copolymer according to claim 1, wherein a weight ratio of the seed, the core and the shell is 5 to 40:

20 to 60;

20 to 60.

8. The ASA graft copolymer according to claim 1, wherein the crosslinking agent is selected from the group consisting of divinylbenzene, 3-butanediol diacrylate, 1,3-butanediol dimethacrylate, 1,4-butanediol diacrylate, 1,4-butanediol dimethacrylate, aryl acrylate, aryl methacrylate, trimethylol propane triacrylate, tetraethylene glycol diacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, neopentyl glycol dimethacrylate, triallyl isocyanurate, triarylamine, and diallylamine.

9. The ASA graft copolymer according to claim 5, wherein the crosslinking agent is present in an amount of 0.1 to 10 parts by weight, based on 100 parts by weight of the total weight of monomers of the ASA-based graft copolymer.

10. The ASA graft copolymer according to claim 1, wherein the matrix polymer is at least one selected from a polycarbonate resin, an acrylonitrile-styrene copolymer, a polyester resin and a vinyl chloride resin.

11. The ASA graft copolymer according to claim 1, wherein a weight ratio of the ASA graft copolymer to the matrix polymer is 0.1:

99.9 to 99.9;

0.1.

12. The ASA graft copolymer according to claim 11, further comprising:

at least one additive selected from the group consisting of a flame retardant, a lubricant, an antimicrobial agent, a release agent, a nucleating agent, a plasticizer, a thermostabilizer, an anti-oxidant, a photostabilizer, a compatibilizer, a pigment, a dye and an inorganic additive.

13. A molded article prepared from the ASA graft copolymer composition according to claim 1.

14. The molded article according to claim 13, wherein the molding article is an automobile component, an electric or electrical component or a construction material.