Acryl-based copolymers and optical film including the same

A kind of copolymer and acrylate technology, applied in the field of optical film, can solve the problems of complex process and high price, and achieve the effects of excellent compatibility, excellent heat resistance, excellent delay and durability

Active Publication Date: 2013-03-20
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these membranes have the problems of high co

Method used

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  • Acryl-based copolymers and optical film including the same
  • Acryl-based copolymers and optical film including the same
  • Acryl-based copolymers and optical film including the same

Examples

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Example Embodiment

[0071] Example 1

[0072] The 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 phenyl maleimide monomer. The glass transition temperature and molecular weight of the prepared 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 is mixed with 10 parts by weight of polycarbonate to prepare the final resin composition. The above resin composition is made 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 was 30 / -80, respectively.

Example Embodiment

[0073] Example 2

[0074] The 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 phenyl maleimide monomer. The glass transition temperature and molecular weight of the prepared 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 the final resin composition. The above resin composition is made 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 was 45 / -120, respectively.

Example Embodiment

[0075] Example 3

[0076] The 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 phenyl maleimide monomer. The glass transition temperature and molecular weight of the prepared 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 is mixed with 20 parts by weight of polycarbonate to prepare the final mixed resin. The above-mentioned 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 was 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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IPC IPC(8): C08F220/18C08F220/52G02B5/02G02F1/1335
CPCG02B5/3083C08F222/40G02F1/133634C08F220/18C08F220/14G02B1/105C08F220/1806C08F222/402G02B1/14C08J5/18G02B1/04
Inventor 姜秉逸韩昌薰李大雨崔银庭
Owner LG CHEM LTD
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