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Amorphous copolyester, substrate, and optical film

A technology of copolyester and optical film, applied in the field of copolyester

Active Publication Date: 2016-01-20
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General polyester film is not easy to meet this condition

Method used

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  • Amorphous copolyester, substrate, and optical film
  • Amorphous copolyester, substrate, and optical film
  • Amorphous copolyester, substrate, and optical film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] With 166 grams of terephthalic acid (TPA) as a diacid monomer, 72.8 grams of 2,2-dimethyl-1,3-propanediol (DMPD, 70mol%) and 58.8 grams of tricyclodecanedimethanol (TCD , 30mole%) is a diol monomer. During the polycondensation reaction, an antimony acetate catalyst with a content of about 350ppm is added, and the esterification reaction is carried out at 240°C to 250°C for about 4 hours, followed by polycondensation at 280°C to 290°C. Condensation reaction is about 4 hours, after two-stage esterification, polycondensation, synthetically have the repeat unit of formula 1 of 0.3 mole fraction, the amorphous polyester (A= 0.3, B=0.7), the intrinsic viscosity measured by Ubbelohde's viscometer is 0.70dL / g.

Embodiment 2

[0070] With 166 grams of terephthalic acid (TPA) as a di-acid monomer, 31.2 grams of 2,2-dimethyl-1,3-propanediol (DMPD, 30mol%) and 137.2 grams of tricyclodecanedimethanol (TCD , 70mole%) is a diol monomer. During the polycondensation reaction, an antimony acetate catalyst with a content of about 350ppm is added, and the esterification reaction is carried out at 240°C to 250°C for about 4 hours, followed by polycondensation at 280°C to 290°C. Condensation reaction is about 4 hours, after two-stage esterification, polycondensation, synthetically have the repeat unit of formula 1 of 0.7 mole fraction, the amorphous polyester (A= 0.7, B=0.3), the intrinsic viscosity measured by Ubbelohde's viscometer is 0.69dL / g.

Embodiment 3

[0072] With 166 grams of terephthalic acid (TPA) as a di-acid monomer, 5.2 grams of 2,2-dimethyl-1,3-propanediol (DMPD, 5mol%) and 186.2 grams of tricyclodecanedimethanol (TCD , 95mole%) is a diol monomer. During the polycondensation reaction, an antimony acetate catalyst with a content of about 350ppm is added, and the esterification reaction is carried out at 240°C to 250°C for about 4 hours, followed by polycondensation at 280°C to 290°C. Condensation reaction is about 4 hours, after two-stage esterification, polycondensation, synthetically have the repeat unit of formula 1 of 0.95 mole fraction, and the amorphous polyester of the repeat unit of formula 2 of 0.05 mole fraction (A= 0.95, B=0.05), and the intrinsic viscosity measured by Ubbelohde's viscometer is 0.68.

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Abstract

The amorphous copolyester provided by the invention is formed by polymerizing diacid monomers and diol monomers. Diacid monomer is selected from at least one of terephthalic acid, 5-tertiary butaneisophthalic acid, and dimethyl 2,6-naphthalene dicarboxylate, and diol monomer is selected from ethylene glycol , 2,2-dimethyl-1,3-propanediol, and at least two of tricyclodecanedimethanol, and tricyclodecanedimethanol accounts for 30% to 95% of the diol molar ratio.

Description

technical field [0001] This invention relates to copolyesters, and more particularly to repeat units and uses of copolyesters. Background technique [0002] Liquid crystal displays use the birefringence properties of liquid crystal molecules and the ability to rotate light to achieve the effect of light and dark display, so more attention should be paid to the improvement of viewing angle. As the size of liquid crystal displays increases and their applications vary, they must be viewed from different angles, and the demand for wide viewing angles is even more important. The requirement of wide viewing angle can be achieved by adding an optical compensation film. [0003] The optical compensation film needs to achieve good light transmission and low birefringence. General polyester film is not easy to meet this condition. [0004] To sum up, there is an urgent need for biaxially stretched polyester films with excellent optical properties, low birefringence, and chemical re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/181C08G63/189C08L67/02G02B1/04
CPCC08G63/181C08G63/199C08K3/26C08K3/36C08K2003/265C08K3/013G02B1/04C08L67/02C08K3/34
Inventor 范正欣时国诚吕铭聪郑力诚
Owner IND TECH RES INST
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