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

A cellulose ester resin, optical film technology, used in optics, optical components, nonlinear optics, etc., can solve problems such as dimensional changes, and achieve the effect of improving moisture permeability resistance and excellent storage stability

Active Publication Date: 2020-08-07
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, TAC has high moisture permeability and easily causes dimensional changes due to moisture absorption and hydrolysis under humid heat conditions. Therefore, it is necessary to suppress moisture absorption with additives, and various additives are provided (for example, refer to Patent Documents 1 and 2).

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] 158 g of 90% neopentyl glycol (hereinafter abbreviated as "NPG") as a diol component and phthalic anhydride (hereinafter abbreviated as "PA") as a dicarboxylic acid component were charged into a 2-liter three-necked flask. 422 g, 410 g of isononyl alcohol (hereinafter abbreviated as "INA") as an alcohol component, and 0.056 g of tetraisopropyl titanate (hereinafter abbreviated as "TIPT") as a catalyst were introduced from a nitrogen gas inlet tube under a nitrogen gas stream. The temperature was raised to 220°C step by step. The condensation reaction was performed at 220° C. for 8 hours, and it was confirmed that the acid value was 1.0 or less. The excess diol was removed under reduced pressure at 200° C. to obtain the ester resin (1) of the present invention. The obtained ester resin (1) was a pale yellow liquid at normal temperature, with an acid value of 0.2 and a number average molecular weight of 520.

Embodiment 2

[0108] 107.6 g of propylene glycol (hereinafter abbreviated as "PG") as a diol component, 362 g of PA as a dicarboxylic acid component, 412 g of INA as an alcohol component, and 0.062 g of TIPT as a catalyst were put into a 2-liter three-necked flask, and introduced from nitrogen gas The temperature of the tube was raised to 220° C. in stages under nitrogen flow. The condensation reaction was performed at 220° C. for 8 hours, and it was confirmed that the acid value was 1.0 or less. The excess diol was removed under reduced pressure at 200° C. to obtain the ester resin (2) of the present invention. The obtained ester resin (2) was a pale yellow liquid at normal temperature, with an acid value of 0.2 and a number average molecular weight of 560.

[0109] Synthesis Example 1 of Ester Resin for Comparative Control

[0110] 383 g of PG as a diol component, 381 g of adipic acid (hereinafter abbreviated as AA) as a dicarboxylic acid component, 129 g of PA, and 0.054 g of TIPT were...

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Abstract

Provided are an ester resin capable of improving the moisture resistance when processed into a film, having excellent storage stability even in a hot, humid environment, and capable of being used suitably as a plasticizer for cellulose ester resin, a resin composition including the same, and, for the purpose of providing an optical film obtained using said resin composition and a liquid-crystal display device using the same, an ester resin having a number-average molecular weight of 350-1000, which is an ester resin represented by the formula B-(A-G)n-A-B [B is an aliphatic monoalcohol 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), the content of (A2) in the total (A1 + A2) of (A1) and (A2) is 70-100 mol%, and n is a repeating number], a cellulose ester resin composition including the same, and an optical film and a liquid-crystal display device including said composition.

Description

technical field [0001] The present invention relates to an ester resin suitable as a plasticizer for a cellulose ester resin, a cellulose ester resin composition containing the ester resin, an optical film obtained using the resin composition, and a liquid crystal display device using the same. Background technique [0002] In recent years, the thinning of liquid crystal displays has progressed, and the protective film for polarizing plates has also been reduced from the conventional 80 μm to 40 μm to 20 μm. In the protective film of a polarizing plate, triacetyl cellulose resin (hereinafter, TAC) is often used at present from the viewpoint of easy lamination with a polarizing plate. [0003] However, TAC has high moisture permeability and easily causes dimensional changes due to moisture absorption and hydrolysis under humid heat conditions. Therefore, additives are required to suppress moisture absorption, and various additives have been provided (for example, refer to Pat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/181C08J5/18C08L1/10C08L1/16C08L67/02G02B5/30
CPCC08G63/181C08J5/18C08L1/10C08L1/16C08L67/02G02B5/30G02B1/14G02F1/133528C08J2301/10C08J2301/16C08J2467/02
Inventor 尾崎知代田尻裕辅吉村洋志
Owner DIC CORP
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