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Additive for cellulose ester resin, cellulose ester resin composition using same, and optical film

A technology of cellulose ester resin and additives, applied in the directions of diffusing elements, polarizing elements, etc., can solve the problems of insufficient satisfaction and achieve the effect of high Rth value

Active Publication Date: 2010-09-29
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ester compound can increase the Rth value of the polarizer protective film, but cannot sufficiently satisfy the further demanded higher Rth value

Method used

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  • Additive for cellulose ester resin, cellulose ester resin composition using same, and optical film
  • Additive for cellulose ester resin, cellulose ester resin composition using same, and optical film
  • Additive for cellulose ester resin, cellulose ester resin composition using same, and optical film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] [Example 1] Manufacture of ester compound (A-1)

[0119] 248g of ethylene glycol (hereinafter abbreviated as "EG"), 304g of propylene glycol (hereinafter abbreviated as "PG"), 682g of dimethyl terephthalate (hereinafter abbreviated as "DMT") and 952g of benzoic acid ( Hereinafter abbreviated as "BzA") was charged into a four-neck flask with an inner volume of 3 liters equipped with a thermometer, a stirrer, a reflux condenser, and a nitrogen gas introduction tube, and the temperature was raised. When the temperature in the flask reaches 130°C, add an esterification catalyst tetraisopropyl titanate (hereinafter abbreviated as "TIPT") that is 60 ppm relative to the total amount of EG, PG, DMT and BzA, and stir under nitrogen flow, From 170°C, the temperature was raised to 230°C while distilling off produced water and methanol at a rate of temperature increase of 10°C per hour. Next, by making the temperature in the flask 200° C. and heating for 4 hours under a reduced pr...

Embodiment 2

[0120] [Example 2] Production of ester compound (A-2)

[0121] 235 g of EG, 288 g of PG, 971 g of DMT, and 545 g of PTA were charged into a four-neck flask with an inner volume of 3 liters equipped with a thermometer, a stirrer, a reflux condenser, and a nitrogen introduction tube, and the temperature was raised. When the temperature in the flask reaches 130°C, add the esterification catalyst TIPT which is 60ppm relative to the total amount of EG, PG, DMT and PTA. While stirring under nitrogen flow, start from 170°C at a rate of 10°C per hour. The temperature was raised to 230° C. while distilling off generated water and methanol. Next, by making the temperature in the flask 200° C. and heating for 4 hours under a reduced pressure of about 100 Pa, an ester compound (A-2) (acid value: 0.10, hydroxyl value :13).

Embodiment 3

[0122] [Example 3] Production of ester compound (A-3)

[0123]224 g of EG, 274 g of PG, 871 g of terephthalic acid (hereinafter abbreviated as "TPA"), and 272 g of PTA were charged into a quadruple chamber with an inner volume of 3 liters having a thermometer, a stirrer, a reflux condenser, and a nitrogen gas introduction tube. Start to heat up in the flask. When the temperature in the kettle reaches 130°C, add the esterification catalyst TIPT which is 60ppm relative to the total amount of EG, PG, TPA and PTA, and stir under the nitrogen flow while starting from 170°C at a rate of 10°C per hour. The temperature was raised to 245°C while distilling off generated water and methanol. Next, by making the temperature in the flask 200° C. and heating for 4 hours under a reduced pressure of about 100 Pa, an ester compound (A-3) with a number average molecular weight of 1060 and a weight average molecular weight of 2200 (acid value: 0.43, hydroxyl value :16).

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Abstract

The invention provides an additive for a cellulose ester resin, a cellulose ester resin composition using same, and an optical film formed of the resin composition. The additive for the cellulose ester resin contains an ester compound (A) which is an ester compound produced through an esterification reaction by a straight chain alkylene glycol (a-1), a branch chain alkylene glycol (a-2), a dicarboxylic acid such as terephthalic acid or an aromatic dicarboxylic acid compound (a-3) such as an alkyl ester of the terephthalic acid, and the aromatic monocarboxylic acid compound (a-4), wherein the molar ratio (a-1) / (a-2) of the straight chain alkylene glycol (a-1) to the branch chain alkylene glycol (a-2) is arranged between 85 / 15 and 15 / 85; and the number average molecular weight of the ester compound is arranged between 300 and 2000. The optical film has a high retardation value, the transparency and the moisture permeability resistance.

Description

technical field [0001] The present invention relates to an additive for cellulose ester resins containing an ester compound capable of imparting a high degree to an optical film such as a polarizer protective film by adding the ester compound to a cellulose ester resin, and a cellulose ester resin composition and an optical film using the same. delay value. Background technique [0002] Cellulose ester resin films are used as photographic films because of their transparency, optical isotropy, and high toughness. In recent years, in addition to the above-mentioned properties, the demand for polarizing plates constituting liquid crystal display devices such as televisions and notebooks has rapidly increased due to good adhesion to polyvinyl alcohol (PVA). [0003] Polarizing plates for liquid crystal display devices generally have a structure in which polarizer protective films are attached to both sides of a polarizer in which dichroic molecules are aligned on a PVA film, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/08C08K5/12C08L67/02C08G63/20G02B5/30
CPCC08J5/18C08K5/10C08L1/10C08L33/02G02B5/02
Inventor 三原崇吉村洋志桝本雅也铃木治
Owner DIC CORP
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