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A perfluoropolyether modified silane compound and its surface treatment composition and film

A technology of silane compound and perfluoropolyether, which is applied in the direction of polyether coatings, biocide-containing paints, coatings, etc., can solve the possibility of reducing the possibility of multiple bonding and the improvement of stain resistance cannot be maximized , The tightness between the treatment agent fragment and the substrate cannot be fully exerted, etc., to achieve the best smoothness and excellent antifouling effect

Active Publication Date: 2018-06-01
龙岩思康新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the scheme disclosed in the Chinese invention patent CN 101456947B, two silane groups are placed aside, but due to the use of an aminoamide group with a relatively bulky three-dimensional structure and a large three-dimensional barrier, the possibility of multiple bonding is reduced. The closeness between the chemically bonded treatment agent segment and the substrate may not be fully exerted, resulting in the failure to maximize the improvement of stain resistance

Method used

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  • A perfluoropolyether modified silane compound and its surface treatment composition and film
  • A perfluoropolyether modified silane compound and its surface treatment composition and film
  • A perfluoropolyether modified silane compound and its surface treatment composition and film

Examples

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Effect test

Embodiment 1

[0026] Example 1: Synthesis of perfluoropolyether modified silane compound JE

[0027] Step (A-1): Reduction of acyl fluoride to fluoroether alcohol (1-1)

[0028] In a 2.0L four-necked flask equipped with a stirrer, a dropping funnel, a reflux condenser and a thermometer, 250 g of diethylene glycol dimethyl ether and 11.4 g (0.3 mol) of NaBH 4 , And then 525g (0.175 mole) from the chemical formula F-(CF 2 CF 2 O) n (CF 2 O) n -CF 2 The fluorine polyperfluoroethylene oxide fluoride ether compound (average molecular weight: 3000) represented by -COF is under a nitrogen seal, and the above-mentioned raw material mixture is added dropwise thereto at a rate of 10 mL / min. After completion of the dropwise addition, the temperature of the liquid phase was raised to about 90°C, and the reaction mixture was allowed to proceed at the reaction temperature for 6 hours. After the reaction, the mixture in the flask was stirred and cooled to below 40°C, and then 525 grams of 10% hydrochloric acid...

Embodiment 2

[0049] Example 2 Synthesis of perfluoropolyether modified silane compound NE

[0050] Step (B-2): The acyl fluoride ether reacts with lithium iodide to form the corresponding fluoroether iodide (2-1)

[0051] Add 164 grams of chemical formula F-(CF 2 CF 2 O) n (CF 2 O) m -CF 2 -COF represents the fluorine polyperfluoroethylene oxide fluoride ether compound (average molecular weight is 3000) and 21.7 g of lithium iodide, after nitrogen replacement, then react at 180°C for 10 hours and cool to room temperature, After the solid matter in the reaction mixture is removed, 160 g of crude reaction product can be obtained. This crude product was found to be a mixture of the following two structures of target compound 2-1: and by-product 2-2 through NMR analysis (approximate ratio is 90:10):

[0052] CF 3 CF 2 O-(CF 2 CF 2 O) m -(CF 2 O) n -CF 2 -I (2-1)

[0053] CF 3 CF 2 O-(CF 2 CF 2 O) m -(CF 2 O) n -CF 2 -H (2-2)

[0054] According to the analysis of infrared and nuclear magnetic resonance...

Embodiment 3

[0082] Example 3 Synthesis of perfluoropolyether modified silane compound PE

[0083] Step (C-3a): Compound (2-5) undergoes silylation reaction with methyldichlorosilane

[0084] In order to prevent the compound (2-5) with a vinyl group at the end produced in the step (C-2b) of the above synthesis example from being deactivated due to the presence of a trace of iodide, the platinum catalyst used in the hydrogen silicon reaction is poisoned, The vinyl mixture (2-5) obtained in the above steps is treated with powdered zinc powder and 5% acetic acid aqueous solution at room temperature for half an hour with stirring before the reaction and use. The filtered filtrate is allowed to stand to separate the lower organic layer (see US patent 5,166,453 for details) ), and washed with water once, the processed product thus obtained will be used after the volatile matter is removed under reduced pressure.

[0085] A 100 ml four-flask equipped with a reflux condenser, a thermometer and a stirrer...

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Abstract

The invention discloses a perfluoropolyether-modified silane compound,a surface treatment composition comprising the same and a thin film. The structure of the perfluoropolyether-modified silane compound is as shown in F(CF2CF2O)m(CF2O)nCF2CH2{CH2}p[O(CH2)3]bSi(CH3)a{(CH2)3Si(OCH3)3}3-a, wherein p and b are independent numbers separately; if p and b are 0 at the same time, a can be 1, or if p and b are 1 at the same time, a is 0; and m and n are independent numbers separately. The perfluoropolyether-modified silane compound has good self-assembled monomolecular coating property, and can be used for forming the thin film which has high durability, relatively good smoothness and excellent antifouling property and scratch resistance.

Description

Technical field [0001] The invention relates to a fluorosilicon material and surface treatment technology, in particular to a perfluoropolyether modified silane compound and a surface treatment composition and film containing the same. Background technique [0002] Anti-reflection coatings, optical filters, optical lenses, spectacle lenses, beam splitters, prisms, mirrors and other optical components and medical and sanitary appliances are easily contaminated by fingerprints, skin grease, sweat, cosmetics, etc. during use. Once such stains are adhered, it is difficult to remove them. In particular, stains attached to optical components with anti-reflection coatings are more noticeable and cause various problems. [0003] In order to solve this problem, a so-called silane coupling technique combining inorganic materials (such as glass) and organic materials has been proposed. The silane coupling agent has an organic functional group or chemical structure with good affinity with org...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/337C08G65/336C08G65/331C09D171/02C09D5/16C08J5/18G02B1/18
CPCC08G65/3312C08G65/336C08G65/337C08J5/18C08J2371/02C09D5/1662C09D171/02G02B1/18
Inventor 曹贤根程思聪汤国璋
Owner 龙岩思康新材料有限公司