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Acrylic copolymer and optical film comprising the same

A kind of copolymer and acrylic technology, which is applied in the field of optical film, can solve the problems of high price and complicated process, and achieve the effect of excellent compatibility, excellent heat resistance and maintaining transparency

Active Publication Date: 2015-11-25
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these membranes have the problems of high cost and complicated process in the preparation process

Method used

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  • Acrylic copolymer and optical film comprising the same
  • Acrylic copolymer and optical film comprising the same
  • Acrylic copolymer and optical film comprising the same

Examples

Experimental program
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Effect test

Embodiment 1

[0072] An acrylic copolymer resin was prepared using 91 parts by weight of methyl methacrylate, 5 parts by weight of phenyl methacrylate and 4 parts by weight of phenylmaleimide monomer. The glass transition temperature and molecular weight of the obtained resin were measured, and as a result, a resin having a glass transition temperature of 125° C. and a weight average molecular weight of 110,000 was obtained. 90 parts by weight of the above resin and 10 parts by weight of polycarbonate were mixed to prepare a final resin composition. The above resin composition was formed into a film using a solution casting method, and then stretched at a glass transition temperature to measure the retardation value of the film. As a result, the in-plane retardation value / thickness retardation value were 30 / -80, respectively.

Embodiment 2

[0074] An acrylic copolymer resin was prepared using 86 parts by weight of methyl methacrylate, 10 parts by weight of phenyl methacrylate and 4 parts by weight of phenylmaleimide monomer. The glass transition temperature and molecular weight of the obtained resin were measured, and as a result, a resin having a glass transition temperature of 126° C. and a weight average molecular weight of 115,000 was obtained. 85 parts by weight of the above resin and 15 parts by weight of polycarbonate were mixed to prepare a final resin composition. The above resin composition was formed into a film using a solution casting method, and then stretched at a glass transition temperature to measure the retardation value of the film. As a result, the in-plane retardation value / thickness retardation value were 45 / -120, respectively.

Embodiment 3

[0076] An acrylic copolymer resin was prepared using 76 parts by weight of methyl methacrylate, 20 parts by weight of phenyl methacrylate and 4 parts by weight of phenylmaleimide monomer. The glass transition temperature and molecular weight of the obtained resin were measured, and as a result, a resin having a glass transition temperature of 128° C. and a weight average molecular weight of 115,000 was obtained. 80 parts by weight of the above resin were mixed with 20 parts by weight of polycarbonate to prepare a final mixed resin. The above mixed resin was formed into a film using a solution casting method, and then stretched at a glass transition temperature to measure the retardation value of the film. As a result, the in-plane retardation value / thickness retardation value were 60 / -280, respectively.

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Abstract

The present invention relates to acryl-based copolymers including an alkyl(meth)acrylate-based monomer; a (meth)acrylate-based monomer containing an aromatic ring; and a maleimide-based monomer, a resin composition including the same, and an optical film prepared by using the same.

Description

technical field [0001] This application claims priority to Korean Patent Application No. 10-2010-0062418 filed with the Korean Intellectual Property Office on Jun. 30, 2010, the disclosure of which is incorporated herein by reference. [0002] The present invention relates to an acrylic copolymer and an optical film comprising the same. Background technique [0003] Recently, based on the development of optical technology, a display technology using various methods such as plasma display panel (PDP), liquid crystal display (LCD), etc., which replaces the Brown tube of the related art, has been proposed and put into the market. Polymer materials for displays are required to have high performance. For example, in the case of LCDs, achieving wide viewing angles, achieving high contrast ratios, suppressing variations in image tone with viewing angles, and uniformity of screen display have been particularly recognized as important issues, while development toward thin films, lig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/52G02B5/02G02F1/1335
CPCG02F1/133634C08F220/14C08F220/18C08F222/40G02B1/105G02B5/3083C08F220/1806C08F222/402G02B1/14C08J5/18G02B1/04
Inventor 姜秉逸韩昌薰李大雨崔银庭
Owner LG CHEM LTD