(Meth)acrylate-based resin composition having excellent impact resistance and transparency

Patent metadata

Field	Value
Publication number	US-9856373-B2
Application number	US-201414893030-A
Country	US
Kind code	B2
Filing date	Jun 25, 2014
Priority date	Jul 19, 2013
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

Disclosed is a (meth)acrylate-based resin composition comprising a poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer comprising phenyl(meth)acrylate having excellent surface hardness and a high refractive index, as a base resin and a (conjugated diene (meth)acrylate) graft copolymer having excellent impact absorption efficiency, the (meth)acrylate-based resin composition providing excellent transparency by exhibiting excellent impact resistance even using a small amount of impact modifier. The (meth)acrylate-based resin composition having excellent impact resistance and transparency comprises 1 to 29 wt % of the (conjugated diene-(meth)acrylate) graft copolymer and 71 to 99 wt % of the poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer.

First claim

What is claimed is:

1. A (meth)acrylate-based resin composition, comprising:
90 to 95 wt % of a poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer; and
5 to 10 wt % of a conjugated diene based polymer.

2. The (meth)acrylate-based resin composition according to claim 1 , wherein the conjugated diene based polymer is selected from the group consisting of conjugated diene based graft copolymer, styrene-butadiene-styrene block copolymer, and a mixture thereof.

3. The (meth)acrylate-based resin composition according to claim 1 , wherein an alkyl group of alkyl(meth)acrylate of the poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer is a C1 to C5 alkyl group.

4. The (meth)acrylate-based resin composition according to claim 1 , wherein alkyl(meth)acrylate of the poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer is selected from the group consisting of methylacrylate, ethylacrylate, methylmethacrylate, ethylmethacrylate, methylethacrylate, ethylethacrylate, propylacrylate, isopropylacrylate, butylacrylate, propylmethacrylate, isopropylmethacrylate, butylmethacrylate, isobutylmethacrylate, and a mixture of two or more thereof.

5. The (meth)acrylate-based resin composition according to claim 1 , wherein a weight ratio of alkyl(meth)acrylate:phenyl(meth)acrylate in the poly(alkyl(meth)acrylate-phenyl(meth)acrylate) copolymer is 10 to 90:90 to 10.

6. The (meth)acrylate-based resin composition according to claim 2 , wherein the conjugated diene based polymer has a refractive index of 1.5150 to 1.5160.

7. The (meth)acrylate-based resin composition according to claim 2 , wherein the conjugated diene based graft copolymer is an ABS based graft copolymer comprising rubber latex as a core.

8. The (meth)acrylate-based resin composition according to claim 7 , wherein the conjugated diene based rubber latex as a core is obtained by emulsion polymerizing a conjugated diene based monomer, or a mixture of a conjugated diene based monomer and vinyl aromatic monomer, in the presence of an emulsifier.

9. The (meth)acrylate-based resin composition according to claim 8 , wherein the conjugated diene based monomer is selected from the group consisting of 1,3-butadiene, isoprene, chloroprene, or a mixture of two or more thereof.

10. The (meth)acrylate-based resin composition according to claim 8 , wherein the vinyl aromatic monomer is selected from the group consisting of styrene, α-methylstyrene, vinyl toluene, α-chlorostyrene, o-methyl styrene, dichlorostyrene, vinylnaphthalene, and a mixture of two or more thereof.

11. The (meth)acrylate-based resin composition according to claim 8 , wherein, in the mixture of the conjugated diene based monomer and vinyl aromatic monomer, a mix ratio of the conjugated diene based monomer:vinyl aromatic monomer is 70 to 95:5 to 30 in parts by weight.

12. The (meth)acrylate-based resin composition according to claim 1 , wherein the conjugated diene based polymer includes a styrene-butadiene-styrene copolymer.

Assignees

• Lg Chemical Ltd

Inventors

• Kang Byoung Il
• Han Chang Hun
• Seo Jae Bum
• Sung Da Eun
• Lee Dae Woo
• Choi Eun Jung

Classifications

• C08L53/02 Primary

  of vinyl-aromatic monomers and conjugated dienes · CPC title

• C08L33/12

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C08F220/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title

• C08L51/04

  grafted on to rubbers · CPC title

• C08L33/04 Primary

  Homopolymers or copolymers of esters {(C08L43/04 takes precedence)} · CPC title