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A kind of preparation method of polyester masterbatch and film thereof

A polyester masterbatch and polyester technology, which is applied in the field of preparation of new polyesters and their masterbatches and films, can solve problems such as improving the optical properties of films, and achieve the effects of improving clarity and reducing haze.

Active Publication Date: 2020-02-21
SINOPEC YIZHENG CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is applied to PEN film, and there is no improvement effect on the optical properties of the film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The alpha quartz of 360g is pre-dispersed with 2640g ethylene glycol, grinds in ball mill for 0.5 hour, and preparation mass concentration is the alpha quartz / ethylene glycol suspension of 12%, and wherein alpha quartz mean particle size median value d(50) is 1.7 μm, d(90) is 3.7 μm.

[0027] Add 5000g terephthalic acid, 3000g ethylene glycol, 1.612g ethylene glycol antimony catalyst, 144.58g of the above-mentioned α quartz / ethylene glycol suspension in a 20L general-purpose polymerization reactor, at 230°C-240°C, 0.25Mpa (Table Under pressure), the esterification reaction was carried out, and when the water output reached 1100ml, the pressure was released to normal pressure. The polycondensation reaction is carried out under the conditions of internal temperature 270°C-280°C and vacuum <100Pa. After the reaction is completed, it is extruded by a melt pump, pelletized, and dried to obtain a new type of polyester masterbatch. The α-quartz content in the new polyester m...

Embodiment 2

[0030] The alpha quartz of 320g, 3680g ethylene glycol carry out pre-dispersion, utilize ball mill to grind 0.4 hour, the preparation mass concentration is the alpha quartz / ethylene glycol suspension of 8%, wherein the median value d(50) of alpha quartz mean particle size is 1.7 μm, d(90) is 3.7 μm.

[0031] Add 400kg of terephthalic acid, 200kg of ethylene glycol, and 161.2g of ethylene glycol antimony to the beating tank of the semi-continuous polymerization device. After dispersing evenly, slowly enter the esterification reaction tank according to the progress of the esterification reaction. gauge pressure) to carry out the esterification reaction, and the esterification reaction was completed when the water output reached 86.7kg. Press the esterified product into the polycondensation kettle under nitrogen pressure, add 2892g of the above-mentioned α-quartz / ethylene glycol suspension, and carry out the polycondensation reaction at an internal temperature of 270°C-282°C and ...

Embodiment 3

[0034] 450kg of α-quartz and 2550kg of ethylene glycol are pre-dispersed in an industrial dispersion tank, and they are ground for 1 hour by a ball mill to prepare a 15% α-quartz / ethylene glycol suspension, wherein the average particle diameter of α-quartz is d (50) is 1.7 μm, and d(90) is 3.7 μm.

[0035] A continuous polyester plant with a five-pot process is used to produce new polyester masterbatches, with an output of 500t / d. The whole set of reaction equipment includes the first esterification tank, the second esterification tank, the first pre-condensation tank, the second pre-condensation tank and the final polycondensation tank . Terephthalic acid and ethylene glycol are continuously fed into the beating tank according to the ratio, and the ethylene glycol antimony catalyst preparation solution is continuously added to the beating tank (the content of antimony element in the total amount of polyester is 160ppm); after beating Feed reaction to the first esterification...

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Abstract

The invention relates to a novel polyester masterbatch preparation method and a novel polyester film preparation method. According to the present invention, the polyester is produced by using a dibasic acid and a diol as monomers through a direct esterification method, wherein the preparation process comprises an esterification reaction and a condensation polymerization reaction, and additives such as alpha quartz and an antimony-based catalyst are added during the reaction; with the application of the polyester masterbatch to prepare the film, other anti-adhesion masterbatches are not required to be added; in the case of the same powder content in the film, compared to the film prepared by using the PET masterbatch prepared from the conventionally used amorphous silica, the haze of the film prepared from the novel polyester masterbatch of the present invention is reduced by 20%, and the gloss and the sharpness can be increased by 5%; and the novel polyester masterbatch of the presentinvention is mainly used for biaxially stretched PET polyester films, and can further be used for spinning.

Description

technical field [0001] The invention belongs to the field of macromolecule chemical industry, and in particular relates to a preparation method of novel polyester, masterbatch and film thereof. Background technique [0002] Biaxially oriented polyethylene terephthalate film (BOPET) is a polymer film material with excellent comprehensive properties. The polyester masterbatch commonly used in the production of BOPET contains additives such as silica blocking agents to prevent the film from being damaged during production and post-production. Blocking occurs during processing, which affects the application of the film. At present, the silica used in conventional polyester masterbatches mainly includes gel silica, precipitated silica, etc., all of which are amorphous silica, and its refractive index is 1.46, which is quite different from PET's refractive index of 1.64. Therefore, the addition of masterbatch tends to increase the haze of the film. In addition, the median partic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/86C08K3/36C08L67/02C08J5/18B29C48/18
CPCB29C48/18C08G63/183C08G63/866C08J5/18C08J2367/02C08K3/36C08L67/02C08L2203/16C08L2205/025
Inventor 王树霞戴钧明司虎王玉合
Owner SINOPEC YIZHENG CHEM FIBER
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