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Polyester and preparation method thereof as well as hydrolysis-resistant polyester film and preparation method and application thereof

A polyester film, polyester technology, applied in semiconductor devices, electrical components, circuits, etc., can solve problems such as reducing water vapor permeability, increasing production costs, and complex processes

Pending Publication Date: 2022-07-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coating acrylic coatings, metal and metal oxide coatings, and inorganic non-metallic coatings can reduce water vapor permeability, but the process is complicated and increases the preparation cost

Method used

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  • Polyester and preparation method thereof as well as hydrolysis-resistant polyester film and preparation method and application thereof
  • Polyester and preparation method thereof as well as hydrolysis-resistant polyester film and preparation method and application thereof
  • Polyester and preparation method thereof as well as hydrolysis-resistant polyester film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 600g of terephthalic acid, 300g of ethylene glycol and 0.27g of ethylene glycol antimony were mixed uniformly, added to the reaction kettle for esterification reaction, the reaction conditions were temperature 255°C, pressure 260kPa, time 2h; 4.5g of maleic anhydride grafted polyethylene (the quality of maleic anhydride accounted for 0.5wt% of the mass of maleic anhydride grafted polyethylene) was added in the reaction kettle to carry out polycondensation reaction, the temperature was 270°C, and the pressure was 100Pa; After the end, nitrogen is passed through, the material is discharged, and after dicing, the hydrolysis-resistant polyester with an intrinsic viscosity of 0.72 dL / g is obtained; the obtained polyester is subjected to an extrusion casting process and heat treatment at 120° C. for 5 minutes to obtain a hydrolysis-resistant polyester film.

[0052] The obtained polyester film had a breaking elongation retention rate of 50% after 48 hours in an environment wit...

Embodiment 2

[0055] Mix 700g of 2,6-naphthalenedicarboxylic acid, 295g of 1,3-propanediol and 0.02g of tetrabutyl titanate evenly, and add them to the reaction kettle to carry out esterification reaction. The reaction conditions are that the temperature is 240°C, the pressure is 230kPa, and the time is 1.6h. The reactor is down to normal pressure, and 29.5g maleic anhydride grafted styrene-ethylene-butylene-styrene copolymer (the maleic anhydride quality accounts for maleic anhydride grafted styrene-ethylene-butylene-benzene) 1wt% of the mass of the ethylene copolymer) was added to the reaction kettle to carry out the polycondensation reaction, the temperature was 262°C, and the pressure was 20Pa; after the reaction, nitrogen was passed through, the material was discharged, and the intrinsic viscosity was 0.66dL / g after dicing. ester; hydrolysis-resistant polyester film is prepared by extruding and calendering the obtained polyester and heat treatment at 80° C. for 60 minutes.

[0056] The...

Embodiment 3

[0058] 500g 4,4'-biphenyl dicarboxylic acid, 310g 1,4-cyclohexanedimethanol and 0.08g aluminum acetate were mixed uniformly, added to the reaction kettle to carry out esterification reaction, the reaction conditions were temperature 250°C, pressure 290kPa, Time 2.4h; the reaction kettle was reduced to normal pressure, and 48g of maleic anhydride grafted polypropylene (the mass of maleic anhydride accounted for 0.2wt% of the mass of maleic anhydride grafted polypropylene) was added to the reaction kettle to carry out polycondensation reaction, The temperature was 275°C, and the pressure was 180Pa; after the reaction, nitrogen was passed through, the material was discharged, and after dicing, a hydrolysis-resistant polyester with an intrinsic viscosity of 0.81 dL / g was obtained; A hydrolysis-resistant polyester film was obtained.

[0059] The obtained polyester film had a breaking elongation retention rate of 40% after 48 hours in an environment with a temperature of 121° C. and...

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Abstract

The invention discloses hydrolysis-resistant polyester and a preparation method thereof as well as a hydrolysis-resistant film thereof as well as a preparation method and application of the hydrolysis-resistant film. The polyester is obtained by carrying out a reaction on components including dihydric alcohol, dibasic acid and maleic anhydride grafted polyolefin. And carrying out an extrusion film forming process on the polyester to obtain the polyester film. The polyester film can be applied to a solar cell backboard and has excellent hydrolysis resistance.

Description

technical field [0001] The invention relates to the field of polyester films, in particular to a polyester and its preparation method, a hydrolysis-resistant polyester film and its preparation method and application. Background technique [0002] As a crystalline polymer, thermoplastic polyester has the advantages of good mechanical properties, dimensional stability, dielectric properties and chemical resistance, and has been widely used in the fields of fibers and films. However, due to the large number of ester bonds in polyester, its hydrolysis resistance is poor, especially in the case of damp heat, it is very easy to degrade. For example, when applied in the field of photovoltaic backsheets, ordinary polyester cannot meet the requirements of the life of photovoltaic modules, and its hydrolysis resistance needs to be improved and optimized. [0003] In order to improve the hydrolysis resistance of polyester, the prior art provides a polyester composition suitable for us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/189C08G63/185C08G63/78C08L67/02C08J5/18H01L31/048H01L31/049
CPCC08G63/183C08G63/189C08G63/185C08G63/78C08J5/18H01L31/0481H01L31/049C08J2367/02
Inventor 钱振超王睿熊金根章瑛虹
Owner CHINA PETROLEUM & CHEM CORP
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