Acrylic resin film having good transparency and impact resistance and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-9206294-B2
Application number	US-201214356994-A
Country	US
Kind code	B2
Filing date	Nov 20, 2012
Priority date	Nov 23, 2011
Publication date	Dec 8, 2015
Grant date	Dec 8, 2015

Abstract

Disclosed are an acrylic resin film maintaining a gloss and having good transparency, processing properties, and impact resistance after thermal molding, and a method for manufacturing same. The acrylic resin film according to the present invention includes 10 to 70 parts by weight of an acrylic resin having high fluidity, 10 to 70 parts by weight of an acrylic resin having high hardness, and 5 to 20 parts by weight of an acrylic impact reinforcing material based on 100 parts by weight of the total weight.

First claim

The invention claimed is:

1. An acrylic resin film comprising:
10 parts by weight to 70 parts by weight of a first acrylic resin, wherein the first acrylic resin comprises 70 parts by weight to 90 parts by weight of methyl methacrylate (MMA) and 10 parts by weight to 30 parts by weight of methyl acrylate (MA);
10 parts by weight to 70 parts by weight of a second acrylic resin, wherein the second acrylic resin comprises 65 parts by weight to 85 parts by weight of methyl methacrylate (MMA), 35 parts by weight to 15 parts by weight of methyl acrylate (MA) and 5 parts by weight to 10 parts by weight of styrene; and
5 parts by weight to 20 parts by weight of an acrylic impact modifier, based on a total of 100 parts by weight of the acrylic resin film.

2. The acrylic resin film according to claim 1 , wherein the first acrylic resin has a weight average molecular weight of 100,000 or less.

3. The acrylic resin film according to claim 1 , wherein the second high rigidity acrylic resin has a weight average molecular weight of 150,000 or more.

4. The acrylic resin film according to claim 1 , wherein the acrylic impact modifier comprises butyl acrylate and has a core-shell structure.

5. A method for preparing an acrylic resin film, comprising:
(a) preparing a resin composition by mixing 10 parts by weight to 70 parts by weight of a first acrylic resin wherein the first acrylic resin comprises 70 parts by weight to 90 parts by weight of methyl methacrylate (MMA) and 30 parts by weight to 10 parts by weight of methyl acrylate (MA), 10 parts by weight to 70 parts by weight of a second acrylic resin wherein the second acrylic resin comprises 65 parts by weight to 85 parts by weight of methyl methacrylate (MMA), 35 parts by weight to 15 parts by weight of methyl acrylate (MA) and 5 parts by weight to 10 parts by weight of styrene, and 5 parts by weight to 20 parts by weight of an acrylic impact modifier, based on a total of 100 parts by weight of the resin composition;
(b) forming a resin molded article through melt extrusion of the resin composition; and
(c) drying the resin molded article.

6. The method according to claim 5 , wherein, in operation (b), the resin molded article is formed by a T-die process.

7. The method according to claim 5 , wherein, in operation (b), melt extrusion is performed at 200° C. to 300° C.

8. The method according to claim 5 , wherein, in operation (c), drying is performed at 50° C. to 70° C. for 3 hours to 5 hours.

Assignees

• Lg Hausys Ltd

Inventors

• Shin Chang Hak
• Lee Eung Kee
• Park Ku Il
• Hwang Deok Ryul
• Lee Min Hee

Classifications

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• B29K2033/08

  Polymers of acrylic acid esters, e.g. PMA, i.e. polymethylacrylate · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08J2433/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• C08L33/12

  Homopolymers or copolymers of methyl methacrylate · CPC title