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Polyester resin composition, process for production thereof, and laminated polyester film

A technology of polyester resin and manufacturing method, which is applied in the field of polyester resin composition, can solve problems such as inability to deal with thermal deterioration of polyester resin, scattering of diol components, inability to react with diol, etc., and achieve excellent thermal stability and low refractive index and photoelastic coefficient are low, and the effect of inhibiting gelation

Active Publication Date: 2012-07-04
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this production method has the following problems: the diol having a cyclic acetal skeleton cannot be efficiently reacted, the diol component having a cyclic acetal skeleton scatters during the polycondensation reaction, and gel occurs during polymerization. etc.
However, it cannot cope with thermal deterioration in the production of polyester resin, and the effect is not sufficient

Method used

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  • Polyester resin composition, process for production thereof, and laminated polyester film
  • Polyester resin composition, process for production thereof, and laminated polyester film
  • Polyester resin composition, process for production thereof, and laminated polyester film

Examples

Experimental program
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Effect test

Embodiment

[0105] Hereinafter, examples are given to further specifically describe the present invention. In addition, the measuring method of a physical property and the evaluation method of an effect were performed by the following method.

[0106] (1) Thermal properties of polyester (glass transition temperature, heat of crystal fusion)

[0107] About 10 mg of the sample to be measured was weighed, sealed with an aluminum pan and a pan lid, and measured with a differential scanning calorimeter (model DSC7 manufactured by Perkin Elmer Co., Ltd.). In the measurement, the temperature was raised from 20°C to 285°C at a rate of 16°C / min in a nitrogen atmosphere, then rapidly cooled with liquid nitrogen, and the temperature was raised again from 20°C to 285°C at a rate of 16°C / min in a nitrogen atmosphere . The glass transition temperature was measured during this second temperature rise.

[0108] In addition, the heat of crystal fusion was calculated from the area of ​​the crystal melti...

reference example 1

[0150] Reference example 1 (the synthetic method of titanium catalyst A. citric acid chelated titanium compound)

[0151] Into a 3 L flask equipped with a stirrer, a condenser and a thermometer, warm water (371 g) and citric acid monohydrate (532 g, 2.52 mol) were added, dissolved and stirred. To this stirred solution, titanium tetraisopropoxide (284 g, 1.0 mol) was slowly added dropwise from the dropping funnel. The mixture was heated and refluxed for 1 hour to obtain a turbid solution. The isopropanol / water mixture was distilled off from the obtained solution under reduced pressure. While cooling the remaining solution to a temperature lower than 70° C. and stirring, 380 g of a 32% by weight aqueous solution of NaOH was slowly added dropwise from the dropping funnel. The obtained product was filtered, then mixed with ethylene glycol (504 g, 8.1 mol), and heated under vacuum to remove isopropanol / water to obtain a slightly turbid pale yellow product (Ti content 3.85% by wei...

reference example 2

[0152] Reference example 2 (the synthetic method of titanium catalyst B. lactic acid chelated titanium compound)

[0153] Titanium tetraisopropoxide (284 g, 1.0 mol) was placed in a 2 L flask equipped with a stirrer, a condenser, and a thermometer, and ethylene glycol (218 g, 3.51 mol) was added from the dropping funnel while stirring. The rate of addition was adjusted as the heat of reaction warmed the contents of the flask to about 50°C. The obtained reaction mixture was stirred for 15 minutes, and then 252 g of an 85% by weight aqueous solution of ammonium lactate was added to obtain a transparent pale yellow product (Ti content: 6.54% by weight).

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Abstract

The present invention is a composition containing a polyester resin containing at least an alicyclic dicarboxylic acid component and an alicyclic diol component, and it is a polyester resin composition which satisfies that a glass transition temperature is 65 DEG C or more and 90 DEG C or less, a refractive index at sodium D line is 1.500 or more and 1.570 or less, a titanium element content is 5ppm or more and 500 ppm or less, a phosphorus element content is 50 ppm or more and 500 ppm or less and a gel fraction is 50% or less. By the present invention, it is possible to obtain a polyester resin composition having a low refractive index and photoelastic coefficient, and in which a thermally degraded foreign substance is reduced.

Description

technical field [0001] The present invention relates to a polyester resin composition having a low photoelastic coefficient, a low refractive index, and a low gelation rate, and a method for producing the same. Furthermore, it relates to an optically functional polyester film. Background technique [0002] In recent years, the demand for optically functional films has gradually increased. Specific examples of the optical functional film include, for example, a light reflective film having a high reflectance obtained by laminating layers having different refractive indices into multiple layers without metal plating. In addition, optically isotropic films which have a low photoelastic coefficient and are suitable for use in liquid crystal displays are exemplified. [0003] For example, Patent Document 1 proposes a light reflective film obtained by laminating and copolymerizing a polyester resin composition on a polyethylene naphthalate resin composition (hereinafter referred...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/199B32B27/36G02B1/04
Inventor 吉村仁青野正二坂本纯清水有三小岛博二
Owner TORAY IND INC
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