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Perfluoropolyether, touch screen and fingerprint-proof membrane containing perfluoropolyether membrane and preparation thereof

A technology of perfluoropolyether and anti-fingerprint film, which is applied in the field of perfluoropolyether, can solve the problems of large surface static friction coefficient, high deposition temperature, and difficult control of thickness, and achieve good anti-fingerprint performance

Inactive Publication Date: 2014-04-16
陈琦 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Recently, the main method for preparing the buffer layer is the physical vapor deposition method, but this type of method has disadvantages such as high deposition temperature, slow deposition rate, relatively large surface roughness of the film layer, large surface static friction coefficient, and difficulty in controlling the thickness of each part.

Method used

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  • Perfluoropolyether, touch screen and fingerprint-proof membrane containing perfluoropolyether membrane and preparation thereof
  • Perfluoropolyether, touch screen and fingerprint-proof membrane containing perfluoropolyether membrane and preparation thereof
  • Perfluoropolyether, touch screen and fingerprint-proof membrane containing perfluoropolyether membrane and preparation thereof

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preparation example Construction

[0025] The synthesis method comprises the following steps: providing a fluoride salt and a polar solvent mixture; adding tetrafluorooxetane to make a catalytic amount of fluorine negative ion react with the tetrafluorooxetane at a certain temperature; Distillation, by controlling the vacuum degree and distillation temperature, the perfluoropolyether material with the required degree of polymerization is collected.

[0026] The polar solvent can adopt diglyme or similar property solvent. The reaction temperature is -30°C to 100°C.

[0027] The synthesis reaction can be represented by the following formula, where the initiator CsF can be replaced by KF or other suitable fluoride salts.

[0028]

[0029] Compared with the common perfluoropolyether material synthesized from hexafluoropropylene oxide, the perfluoropolyether material of the present invention has a unique structure and has better anti-fingerprint performance when applied to the anti-fingerprint coating of the tou...

Embodiment 1

[0045] 113g KF and 1960g diglyme were added to a 2 gallon (7571ml) stainless steel reactor, stirred and cooled to -17°C. 1485 g (8.95 mols) of tetrafluoro oxetane (molecular weight 166.0) were added within one hour, at which point the reaction temperature rose to -4°C and the pressure rose to 28 KPa. The reaction mixture was stirred for 30 minutes and allowed to warm to room temperature. 7350 g of the bottom fluorochemical phase were recovered. Low-boiling components were removed by distillation under reduced pressure, and components at 150-170 degrees (150mmHg) were collected to obtain perfluoropolyether materials with a degree of polymerization of 20-25.

Embodiment 2

[0047] 139g KF and 1960g diglyme were added to a 2 gallon (7571ml) stainless steel reactor, stirred and cooled to -17°C. 1485 g (8.95 mols) of tetrafluoro oxetane (molecular weight 166.0) were added within one hour, at which point the reaction temperature rose to -4°C and the pressure rose to 28 KPa. The reaction mixture was stirred for 30 minutes and allowed to warm to room temperature. 7400 g of the bottom fluorochemical phase were recovered. Low-boiling components were removed by distillation under reduced pressure, and components at 130-150 degrees (150 mmHg) were collected to obtain a perfluoropolyether material with a degree of polymerization of 15-20.

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Abstract

The invention provides a method for preparing perfluoropolyether through carrying out ring opening polymerization on tetrafluoro oxetane and the perfluoropolyether thereby. According to the method, the ring opening polymerization of the tetrafluoro oxetane is initiated by using fluoride salt as an initiator and a perfluoropolyether chemical compound F-(OCF2CF2CF2)n-CF2CF3 is collected through controlling the vacuum degree and the distillation temperature, where the n=2-30. The invention provides a method for applying the perfluoropolyether material to a fingerprint-proof membrane for touch screens at the same time. According the method, a buffer layer is formed on a glass substrate after being subjected to O2 glow discharge bombardment and a perfluoropolyether membrane is formed on the upper surface of the buffer layer, wherein the buffer layer is a PECVD (Plasma Enhanced Chemical Vapor Deposition)-deposited SiO2 film. A good adhesive force is provided between the SiO2 buffer layer and the glass substrate through depositing the SiO2 buffer layer by utilizing PECVD, so that the adhesive force between the perfluoropolyether fingerprint-proof membrane and the glass substrate is increased to a certain extent.

Description

technical field [0001] The invention relates to a perfluoropolyether, an anti-fingerprint film structure containing a perfluoropolyether film applied to mobile phones and tablet computers, a touch screen, and a preparation method thereof. Background technique [0002] In capacitive touch products (mobile phones, tablet computers), the surface of the glass panel is easily polluted by external dirt and user's fingerprints. Therefore, the technology of maintaining the cleanliness of the glass surface for a long time and removing fingerprints and dirt adhered to the surface more and more has attracted more and more attention. Perfluoropolyether anti-fingerprint film is a film with both hydrophobic and oleophobic properties. Based on good hydrophobicity and oleophobicity, perfluoropolyether film is not easy to adhere to dust and dirt from the outside, and the adhesion In the case of dirt and fingerprints, it also has the characteristics of easy removal of foreign matter on the s...

Claims

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Application Information

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IPC IPC(8): C08G65/22C08L71/00C23C16/40C23C16/44C23C16/02C23C14/12C23C28/00G06F3/041
Inventor 陈琦刘烽王欢
Owner 陈琦
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