Ester resin, antiplasticizer, cellulose ester resin composition, optical film and liquid crystal display device

A technology of optical film and ester resin, which is applied in the fields of optics, nonlinear optics, organic chemistry, etc., can solve the problems of film strength and moisture permeability resistance, etc., and achieve an increase in elastic modulus, excellent strength and moisture permeability resistance, and a balance excellent effect

Active Publication Date: 2020-02-04
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, when additives are added to suppress moisture permeability, plasticization of the resin occurs at the same time, so it is difficult to balance the strength and moisture permeability resistance of the obtained film

Method used

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  • Ester resin, antiplasticizer, cellulose ester resin composition, optical film and liquid crystal display device
  • Ester resin, antiplasticizer, cellulose ester resin composition, optical film and liquid crystal display device
  • Ester resin, antiplasticizer, cellulose ester resin composition, optical film and liquid crystal display device

Examples

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Embodiment

[0121] Hereinafter, based on an Example, this invention is demonstrated more concretely. Parts and % in examples are based on mass unless otherwise specified.

Synthetic example 1

[0123] 405 g of 1,2-propanediol (PG) as a diol component, 79 g of adipic acid (AA) as a dicarboxylic acid, 240 g of phthalic anhydride (PA), and 586 g of benzoic acid (BzA) as a monocarboxylic acid Put 0.08 g of tetraisopropyl titanate (TIPT) as an esterification catalyst into a four-necked flask with an internal volume of 2 liters equipped with a thermometer, a stirrer, and a reflux condenser, and stir under a nitrogen stream while gradually The temperature was raised to 230° C., and then the reaction was continued at 230° C., and a dehydration condensation reaction occurred for a total of 19 hours to obtain a reaction product (acid value: 0.22, hydroxyl value: 16). The number average molecular weight (Mn) of the ester resin (1-1) which is the reaction product thereof was 405. figure 1 A spectrum obtained by GPC measurement is shown. In the GPC spectrum, the area % of components with n=0 was 31%, and the area % of components with n being 3 or more was 20%.

Synthetic example 2

[0125] Using 405 g of PG as a diol component, 320 g of PA as a dicarboxylic acid component, 586 g of BzA as a monocarboxylic acid component, and 0.08 g of TIPT, it synthesized similarly to the synthesis example 1, and obtained ester resin (1-2). Its properties are also shown in Table 1.

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Abstract

Provided are: ester resin and a resin composition which can increase strength when processing a resin into a film and improve moisture permeation resistance, and can be used as an antiplasticizer foroptical use resin; and an optical film and a liquid crystal display device obtained using said resin composition. More specifically, provided are: ester resin represented by the formula B-(G-A)n-G-B (in which B is a monocarboxylic acid residue, G is an alkylene glycol residue, an oxyalkylene glycol residue or an aryl glycol residue, A is an alkylene dicarboxylic acid residue (A1) or an aryl dicarboxylic acid residue (A2), with the content of component (A2) being 70-100 mol% of (A1+A2), and n is the number of repeating units], wherein the proportion of components for which n=0 is 10-70% in terms of areal ratio in GPC measurements, and the ratio of the areal percentage of components for which n is 3 or more and the areal percentage of components for which n=0 (n >= 3)/(n=0) is 3 or less; cellulose ester resin composition containing the ester resin; and an optical film and liquid crystal display device containing the composition.

Description

technical field [0001] The present invention relates to an ester resin suitable as an antiplasticizer for resins for optical materials, a cellulose ester resin containing the same, an optical film obtained using the resin composition, and a liquid crystal display device using the same. Background technique [0002] In recent years, liquid crystal displays have gradually become thinner, and polarizing plate protective films have gradually decreased from the conventional 80 μm to 40 μm to 25 μm. Conventionally, a triacetyl cellulose resin (hereinafter referred to as TAC) has been commonly used as a protective film for a polarizing plate from the viewpoint of easy bonding to a polarizing plate. [0003] However, since TAC is hard and brittle, it has problems of insufficient strength and easy breakage when formed into a film. In addition, TAC has high moisture permeability and easily undergoes dimensional changes due to moisture absorption. Therefore, additives are required to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/78C08L1/08C08L67/02C07C69/80C08G63/16C08G63/78G02B5/30G02F1/1335
CPCC07C69/78C07C69/80C08G63/16C08G63/78C08L1/08C08L67/02G02B5/30G02F1/1335C08G63/181C08L1/10
Inventor 尾崎知代田尻裕辅
Owner DIC CORP
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