Synthesis method of biaxially orientated polyester film

A technology of biaxially oriented polyester and a synthesis method, applied in the field of biaxially oriented polyester film synthesis, can solve the problems of low surface tension, easy falling off of aluminized layer or ink, etc., and achieves simple method, low cost, and designability. strong effect

Inactive Publication Date: 2015-04-22
CHONGQING XUXING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Biaxially oriented polyester (BOPET) film is a film material with excellent performance and is widely used in packaging, printing and other fields. The surface tension of unmodified BOPET film is relatively low, and there is an aluminum layer or ink that is easy to fall off during use. The phenomenon cannot meet the requirements of high-end packaging, so it must be surface modified. Coating modification is a method with stable performance and easy industrialization. Coating resin is the key to the implementation of this method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] A method for synthesizing a biaxially stretched polyester film, comprising the steps of:

[0020] Methyl methacrylate, ethyl acrylate, ethanol, and benzoyl peroxide are purified by distillation under reduced pressure, wherein benzoyl peroxide is dissolved in chloroform, filtered, recrystallized in methanol, and treated repeatedly for later use;

[0021] Equipped with stirrer, thermometer, condenser, N 2 Add reaction monomers methyl methacrylate, ethyl acrylate and initiator in sequence to the four-necked bottle of the introduction tube;

[0022] Add the mixed solution of ethyl acrylate and ethanol dropwise to the reaction bottle through the dropping funnel, and add the initiator for constant temperature reaction;

[0023] Under vigorous stirring, ammonia water was added dropwise to neutralize the reaction solution, and an appropriate amount of water was added to dilute to obtain a translucent bluish hydrosol;

[0024] A part is taken out and dried for later use, and p...

Embodiment 1

[0026] Methyl methacrylate, ethyl acrylate, ethanol, and benzoyl peroxide are purified by distillation under reduced pressure, wherein benzoyl peroxide is dissolved in chloroform, filtered, recrystallized in methanol, and treated repeatedly for later use; Equipped with stirrer, thermometer, condenser, N 2 Add the reaction monomers methyl methacrylate, ethyl acrylate and 2 / 3 initiator to the four-necked bottle of the introduction tube in sequence, and raise the temperature to 60°C; drop the mixture of ethyl acrylate and 1 / 2 ethanol through the dropping funnel in 1h Add the remaining ethanol to the reaction bottle, drop the remaining ethanol in 1 hour, and add 1 / 3 of the initiator, keep the temperature down to 40°C after 2 hours of constant temperature reaction; add ammonia water dropwise to neutralize the reaction solution under vigorous stirring, and add 1L of water to dilute, A translucent bluish hydrosol was obtained.

Embodiment 2

[0028] Methyl methacrylate, ethyl acrylate, ethanol, and benzoyl peroxide are purified by distillation under reduced pressure, wherein benzoyl peroxide is dissolved in chloroform, filtered, recrystallized in methanol, and treated repeatedly for later use; Equipped with stirrer, thermometer, condenser, N 2 Add the reaction monomer methyl methacrylate, ethyl acrylate and 2 / 3 initiator to the four-necked bottle of the introduction tube in sequence, and raise the temperature to 80°C; pass the mixture of ethyl acrylate and 1 / 2 ethanol through the dropping funnel in 1.2h Add dropwise to the reaction bottle, the remaining ethanol is added dropwise in 1.3h, and 1 / 3 of the initiator is added, and the temperature is lowered to 50°C after a constant temperature reaction for 3h; ammonia water is added dropwise to neutralize the reaction solution under vigorous stirring, and 5L of water is added to carry out Dilute to obtain a translucent bluish hydrosol.

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PUM

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Abstract

The invention relates to a synthesis method of a biaxially orientated polyester film. The synthesis method comprises the following steps: carrying out reduced pressure distillation on methyl methacrylate, ethyl acrylate, ethanol and benzoyl peroxide for refining, wherein the benzoyl peroxide is dissolved in chloroform, filtered, recrystallized in methanol and repeatedly processed for standby application; sequentially adding reaction monomers including methyl methacrylate, the ethyl acrylate and an initiator to a four-mouth flask equippted with a stirrer, a temperature gauge, a condenser pipe and an N2 ingress pipe; dropwise adding mixed liquid of the ethyl acrylate and the ethanol to the reaction flask by a dropping funnel, replenishing the initiator, and carrying out reaction at constant temperature; dropwise adding ammonium hydroxide under fiercely stirring to neutralize reaction liquid and adding an appropriate amount of water for dilution to obtain semitransparent blue-suffused hydrosol; and taking out a part of the hydrosol and drying for later use and adding water to a part of the hydrosol to dilute film to obtain the biaxially orientated polyester film. The synthesis method is simple and is low in cost. The synthesized biaxially orientated polyester film is strong in designability, good in stability, high in transparency and good in rheological property.

Description

technical field [0001] The invention relates to the technical field of organic coating synthesis, in particular to a method for synthesizing a biaxially stretched polyester film. Background technique [0002] Biaxially oriented polyester (BOPET) film is a film material with excellent performance and is widely used in packaging, printing and other fields. The surface tension of unmodified BOPET film is relatively low, and there is an aluminum layer or ink that is easy to fall off during use. The phenomenon cannot meet the requirements of high-end packaging, so it must be surface modified. Coating modification is a method with stable performance and easy industrialization. Coating resin is the key to the implementation of this method. With the enhancement of environmental awareness, non-solvent water-based coatings have better competitiveness. The resins used for water-based coatings mainly include water-based epoxy resins, polyester resins, acrylic resins, and polyurethane r...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08L33/12C08L33/08
Inventor周祖渝
OwnerCHONGQING XUXING CHEM