Negative C-plate type optical anisotropic film comprising poly cycloolefin and method for preparing the same

一种光学各向异性、聚环烯烃的技术，应用在光学、光学元件、非线性光学等方向，能够解决催化剂中毒等问题

Inactive Publication Date: 2006-03-22
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when there is a polar functional group in the introduced substituent, the free electron pairs in the polar functional group will react with the catalytic active site and cause catalyst poisoning.

Method used

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  • Negative C-plate type optical anisotropic film comprising poly cycloolefin and method for preparing the same
  • Negative C-plate type optical anisotropic film comprising poly cycloolefin and method for preparing the same
  • Negative C-plate type optical anisotropic film comprising poly cycloolefin and method for preparing the same

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preparation example Construction

[0055] The present invention provides a negative C-plate type optically anisotropic film, especially a film comprising a cycloolefin addition polymer prepared by addition polymerization of a norbornene-based monomer, a method for preparing the same, and a film comprising the film LCD Monitor.

[0056] The cycloolefin addition polymer obtained by addition polymerization of a norbornene-based monomer of the present invention includes a homopolymer obtained by addition polymerization of a norbornene-based monomer represented by Chemical Formula 1 below, and Another copolymer obtained by addition copolymerization of monomers:

[0057] chemical formula 1

[0058]

[0059] In Chemical Formula 1,

[0060] m represents an integer from 0 to 4;

[0061] R 1 , R 2 , R 3 and R 4 Hydrogen alone or together; Halogen; C 1 to C 20 Alkyl, alkenyl or vinyl of linear or branched chain structure; C 4 to C 12 Hydrocarbyl substituted or unsubstituted cycloalkyl; C 6 to C 40 Hydrocar...

preparation Embodiment 1

[0158] Preparation Example 1: Polymerization of norbornene carboxylate methyl ester

[0159] The norbornene carboxylate methyl ester monomer and purified toluene were added to the polymerization reactor in a weight ratio of 1:1.

[0160] 0.01 mol% (relative to monomer content) Pd(acac) dissolved in toluene 2 and 0.01 mol% (relative to the monomer content) of tricyclohexylphosphine as a catalyst, and 0.02 mol% (relative to the monomer content) dissolved in CH 2 Cl 2 Tetrakis(pentafluorophenyl) borate dimethylaniline in is added to the reactor as a cocatalyst. The reaction was carried out under stirring at 80°C for 20 hours.

[0161] After the reaction is finished, the reaction mixture is added to excess ethanol to obtain a white copolymer precipitate. The precipitate was filtered with a glass funnel, and then the collected copolymer was dried in a vacuum oven at 65° C. for 24 hours to obtain a norbornene carboxylate methyl ester polymer (PMeNB).

preparation Embodiment 2

[0162] Preparation Example 2: Polymerization of Norbornene Carboxylate Butyl Ester

[0163] The butyl norbornene carboxylate monomer and purified toluene were added to the polymerization reactor at a weight ratio of 1:1.

[0164] 0.01 mol% (relative to monomer content) Pd(acac) dissolved in toluene 2 , and 0.01 mol% (relative to monomer content) of tricyclohexylphosphine as a catalyst, 0.02 mol% (relative to monomer content) dissolved in CH 2 Cl 2 Tetrakis(pentafluorophenyl) borate dimethylaniline in is added to the reactor as a cocatalyst. The reaction was carried out under stirring at 80°C for 20 hours.

[0165] After the reaction was completed, the reaction mixture was added to excess ethanol to obtain a white copolymer precipitate. The precipitate was filtered with a glass funnel, and then the collected copolymer was dried in a vacuum oven at 65° C. for 24 hours to obtain a norbornene carboxylate butyl ester polymer (PBeNB).

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Abstract

The present invention provides a negative C-plate type optical anisotropic film having negative birefringence along the thickness direction. In particular, the present invention provides a film comprising cycloolefin addition polymer, which is prepared by addition polymerizing norbornene-based monomers, a method for preparing the same, and a liquid crystal display comprising the same. The film of the present invention can be used for optical compensation films of a variety of LCD (liquid crystal display) modes because the refractive index along the thickness direction can be controlled by the kind and amount of functional groups introduced to the cycloolefin addition polymer.

Description

technical field [0001] The invention relates to an optical film prepared from polycycloolefin, in particular to an optical anisotropic compensation film containing polycycloolefin. This film has negative birefringence along the density direction (n x ≈n y >n z ; n x = Refractive index along the slow axis; n y = index of refraction along the fast axis; n z = Refractive index along the density direction). It also relates to a method for preparing the optical film. Background technique [0002] Applications for liquid crystal displays (LCDs) are growing rapidly because they consume less power, can run for hours on batteries; are more space-efficient; and are lighter than cathode ray tube (CRT) displays. Recently, the use of medium to large size LCDs has also increased in computer monitors and televisions. Especially in such medium to large size LCDs, it is important to have better image quality over a wider viewing angle range and to provide better contrast when powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18G02B5/30G02F1/13363
CPCG02B5/3083Y10T428/1036Y10T428/105C08J2365/00G02F1/133634C08J5/18C09K2323/03C09K2323/035
Inventor 金源国全成浩尹性澈林兑宣金宪李贞旼刘正秀
Owner LG CHEM LTD
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