Thermoplastic resin composition and article produced therefrom

Patent metadata

Field	Value
Publication number	US-10023734-B2
Application number	US-201615334386-A
Country	US
Kind code	B2
Filing date	Oct 26, 2016
Priority date	Oct 29, 2015
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

wherein R1 and R3 are each independently a hydrogen atom or a C1 to C5 alkyl group, R2 is a C2 to C10 alkylene group, R4 is C1 to C20 alkyl group, and Ar is a C6 to C20 aryl group.

First claim

What is claimed is:

1. A thermoplastic resin composition comprising:
a base resin comprising a rubber-modified vinyl graft copolymer and an aromatic vinyl resin; and
a siloxane compound comprising a repeat unit represented by the following Formula 1 and a repeat unit represented by the following Formula 2,
wherein the repeat unit represented by Formula 1 and the repeat unit represented by Formula 2 are present in a mole ratio of about 2: about 1 to about 4: about 1 in the siloxane compound:

wherein R 1 is a hydrogen atom or a C 1 to C 5 alkyl group, R 2 is a C 2 to C 10 alkylene group, and Ar is a C 6 to C 20 aryl group;

wherein R 3 is a hydrogen atom or a C 1 to C 5 alkyl group and R 4 is a C 1 to C 20 alkyl group.

2. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition comprises about 100 parts by weight of the base resin comprising about 5 wt % to about 25 wt % of the rubber-modified vinyl graft copolymer and about 75 wt % to about 95 wt % of the aromatic vinyl resin, and about 0.1 part by weight to about 10 parts by weight of the siloxane compound.

3. The thermoplastic resin composition according to claim 1 , wherein the rubber-modified vinyl graft copolymer is prepared through graft copolymerization of an alkyl (meth)acrylate, an aromatic vinyl monomer and a monomer copolymerizable with the aromatic vinyl monomer to a rubbery polymer.

4. The thermoplastic resin composition according to claim 3 , wherein the rubbery polymer has an average particle diameter of about 0.1 μm to about 0.5 μm.

5. The thermoplastic resin composition according to claim 1 , wherein the aromatic vinyl resin is obtained through copolymerization of an alkyl (meth)acrylate, an aromatic vinyl monomer and a monomer copolymerizable with the aromatic vinyl monomer.

6. The thermoplastic resin composition according to claim 1 , wherein the siloxane compound has a number average molecular weight of about 3,000 g/mol to about 12,000 g/mol.

7. The thermoplastic resin composition according to claim 1 , wherein the siloxane compound has a refractive index of about 1.489 to about 1.518.

8. The thermoplastic resin composition according to claim 1 , wherein a difference in refractive index between the base resin and the siloxane compound is about 0.01 or less.

9. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has a notched Izod impact resistance of about 3.5 kgf·cm/cm or higher, as measured on an about ⅛″ thick specimen in accordance with ASTM D256.

10. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has a scratch width of about 280 μm or less as measured by a ball-type scratch profile test, and a pencil hardness of H or higher as measured in accordance with ASTM D3362.

11. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has a difference in specular gloss (ΔGloss (60°)) of about 15 or less, as calculated by the following Equation 1:
Difference in specular gloss (ΔGloss (60°))=| G 0 −G 1 |  [Equation]

wherein G 0 is a 60° specular gloss measured on a specimen having a size of 10 cm×15 cm using a crockmeter in accordance with ASTM D523, and G 1 is a 60° specular gloss measured on the specimen after rubbing with a white cotton cloth 10 times.

12. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has a haze of about 3% or less and a light transmittance of about 87% or more, as measured on an about 2.5 mm thick specimen in accordance with ASTM D1003.

13. A molded article formed of the thermoplastic resin composition according to claim 1 .

Assignees

• Lotte Advanced Mat Co Ltd

Inventors

• Ha Sung Min
• Kwon Young Chul
• Kim Byeong Yeol
• Kim Yoen Kyoung
• Yang Cheon Seok

Classifications

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08F279/02 Primary

  on to polymers of conjugated dienes · CPC title

• C08L33/12 Primary

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C08L33/20 Primary

  Homopolymers or copolymers of acrylonitrile (C08L55/02 takes precedence) · CPC title

• C08L2207/53

  Core-shell polymer · CPC title