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Method for modification of polyurethane film for protective glass

A protective glass and polyurethane technology, applied in the field of polyurethane film, can solve the problem of low surface activity, achieve the effect of enhanced surface wetting ability, increased surface tension, and decreased contact angle

Inactive Publication Date: 2015-10-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But on the other hand, the surface activity of the film itself is low, and its adhesive performance needs to be further improved.

Method used

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  • Method for modification of polyurethane film for protective glass
  • Method for modification of polyurethane film for protective glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Polyurethane (PU) films were cut into 30 mm × 10 mm, put into absolute ethanol and deionized water and ultrasonically cleaned for 15 min, respectively, and the films were taken out, placed on petri dishes, and dried in an oven at 40 °C.

[0027] Use a balance to weigh the silane coupling agent KH550, absolute ethanol and deionized water according to the proportions of 1.3wt%, 95%, and 3.7wt%, respectively, and seal them in a beaker at a temperature of 30°C. Stir for 8 hours at a speed of 500 rpm to fully hydrolyze the coupling agent.

[0028] Put the washed and dried PU film into the dilute solution of hydrolyzed silane coupling agent KH550, and ultrasonically treat it for 1min at a temperature of 30°C. The treated film is ultrasonically cleaned with deionized water for 30min, and placed in an oven at 40°C. Medium dry.

[0029] Use the obtained PU film to bond with glass and polycarbonate (PC) to test the sample, place it in a vacuum oven at 120°C and a vacuum of 0.1MP...

Embodiment 2

[0032] Polyurethane (PU) films were cut into 30 mm × 10 mm, put into absolute ethanol and deionized water and ultrasonically cleaned for 15 min, respectively, and the films were taken out, placed on petri dishes, and dried in an oven at 40 °C.

[0033] Use a balance to weigh the silane coupling agent KH550, absolute ethanol and deionized water according to the proportions of 1.5wt%, 95%, and 3.5wt%, respectively, and place them in a sealed beaker at a temperature of 30°C. Stir for 8 hours at a speed of 500 rpm to fully hydrolyze the coupling agent.

[0034] Put the washed and dried PU film into the dilute solution of hydrolyzed silane coupling agent KH550, and ultrasonically treat it for 5 minutes at a temperature of 30°C, then ultrasonically clean the treated film with deionized water for 30 minutes, and place it at 40°C Dry in the oven.

[0035] Use the obtained PU film to bond with glass and polycarbonate (PC) to test the sample, place it in a vacuum oven at 120°C and a va...

Embodiment 3

[0038] Polyurethane (PU) films were cut into 30 mm × 10 mm, put into absolute ethanol and deionized water and ultrasonically cleaned for 15 min, respectively, and the films were taken out, placed on petri dishes, and dried in an oven at 40 °C.

[0039] Use a balance to weigh a certain amount of silane coupling agent KH550, absolute ethanol and deionized water according to the weight fraction of 1.7wt%, 95% and 3.3wt%, and place them in a sealed beaker at a temperature of 30°C. Under magnetic stirring for 8 hours, the rotation speed is 500rpm, so that the coupling agent is fully hydrolyzed.

[0040] Put the washed and dried PU film into the dilute solution of hydrolyzed silane coupling agent KH550, and ultrasonically treat it for 10 minutes at a temperature of 30°C, then ultrasonically clean the treated film with deionized water for 30 minutes, and place it at 40°C Dry in the oven.

[0041] Use the obtained PU film to bond with glass and polycarbonate (PC) to test the sample, ...

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Abstract

The invention relates to the material surface modification technique and provides a method for modification of a polyurethane film for protective glass. The method comprises the steps of mixing a silane coupling agent KH550, deionized water and absolute ethyl alcohol to obtain a silane coupling agent KH550 weak solution; then stirring at 30 DEG C for 8 h till sufficient hydrolysis; placing the washed and dried polyurethane film in the weak solution, and conducting ultrasonic treatment at 30 DEG C for 1-10 min; taking the polyurethane film out, and conducting washing and drying to obtain the surface modified polyurethane film. Compared with the original polyurethane film, the modified polyurethane film has the advantages that light transmittance is improved greatly, the contact angle of the surface of the film is reduced remarkably, which means surface tension is increased, and surface wetting ability is improved; bonding strength is improved, and the light transmittance of the protective glass obtained through recombination of the modified film is improved. According to the method, operation is easy and practical, cost is low, application in production practice is easy, and the method can be used for improving the organic-inorganic bonding strength of compound glass.

Description

technical field [0001] The invention belongs to the technical field of material surface modification and protective glass, and in particular relates to a modification process of polyurethane (PU) film for protective glass. Polyurethane film. Background technique [0002] Protective glass refers to a transparent material that has the light transmission properties of glass and has a certain protective ability. The protective principle is that the glass converts the impact kinetic energy into the elastic potential energy of the glass and the broken surface energy, so as to achieve the purpose of protection. It has played an important role in protection, military and police protection, and ensuring the safety of aerospace and financial activities. In addition, with the development of social economy and the continuous improvement of public security awareness, protective glass has begun to penetrate into various industries of social life such as finance and transportation, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12
Inventor 杨辉姚忠华张启龙尤增宇程文煜樊先平
Owner ZHEJIANG UNIV
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