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Silane compound containing perfluoropolyether group, its preparation method, surface treatment agent and article

A perfluoropolyether-based, silane compound technology, applied in polyether coatings, biocide-containing paints, coatings, etc., can solve the problems of high price, difficult to obtain, and difficult synthesis process.

Active Publication Date: 2019-12-31
GUANGZHOU UR MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing silane compounds containing perfluoropolyether groups have problems such as difficult synthesis process, many process steps, long process, special raw material structure and difficult to obtain, which lead to high price and high production cost.

Method used

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  • Silane compound containing perfluoropolyether group, its preparation method, surface treatment agent and article
  • Silane compound containing perfluoropolyether group, its preparation method, surface treatment agent and article
  • Silane compound containing perfluoropolyether group, its preparation method, surface treatment agent and article

Examples

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preparation example Construction

[0198] The present invention also provides the preparation method of the silane compound containing perfluoropolyether group shown in aforementioned formula (2), described method comprises:

[0199] The formula is Rf-CH 2 The compound of -O-X-COOH is converted into the silane compound containing perfluoropolyether group of formula (2) with acid halide reagent and aminosilane coupling agent,

[0200]

[0201] Among them, R f for:

[0202] q, r and s are independently integers ranging from 0 to 200, the sum of q, r and s is at least 1, and the order of existence of the repeating units enclosed in brackets marking q, r or s is arbitrary in the formula, m is an integer of 1 to 6, t is 0 or 1, Z is a fluorine atom or a trifluoromethyl group,

[0203] X is a divalent organic group,

[0204] T independently in each occurrence is hydroxyl, hydrolyzable group or hydrocarbyl,

[0205] Each time Q appears independently, it is -Y-SiR 1 j R 2 3-j ,

[0206] Each time Y appea...

Embodiment approach

[0271] According to a more preferred embodiment of the present invention, the preparation method for preparing the silane compound containing perfluoropolyether group comprises the following steps:

[0272] Step 1: Let the formula be Rf-CH 2 The compound of OH first reacts with potassium hydroxide at room temperature, and then reacts with the formula BrCH 2 COOC 4 h 9 The compound undergoes a nucleophilic substitution reaction at room temperature or under heating (preferably 25-75° C.) to obtain the formula Rf-CH 2 -OCH 2 COOC 4 h 9 Ester-based perfluoropolyether compounds,

[0273]

[0274] Rf is CF 3 (OCF 2 CF 2 ) r (OCF 2 ) s OCF 2 -, r+s is 35-85, and its number average molecular weight is 3000-8000;

[0275] Step 2: The formula is Rf-CH 2 -OCH 2 COOC 4 h 9 The ester-based perfluoropolyether compound reacts with alkali to hydrolyze, and after adding hydrochloric acid to adjust the acidic separation, the formula is Rf-CH 2 -O-CH 2 COOH carboxyl perflu...

Synthetic example 1

[0291] The silane compound A1 containing perfluoropolyether group was synthesized according to the following steps

[0292] step 1:

[0293] In a 100-mL three-necked round-bottom flask equipped with a stirrer, add 10 g of the average composition as CF 3 (OCF 2 CF 2 ) r (OCF 2 ) s OCF 2 CH 2 OH (the sum of r and s is 35-42) perfluoropolyether modified alcohol (number average molecular weight is 3500-4000), 15mL 1,3-bis(trifluoromethyl)benzene and 5mL ethylene glycol dimethyl Ether and 2.6 g of 50 wt % potassium hydroxide solution were stirred at room temperature for 3 hours. Then, 3.8 mL of tert-butyl bromoacetate and 0.42 g of tetrabutylammonium bromide were sequentially added to the reaction flask, and stirred at 50° C. for 5 hours. After water extraction and vacuum distillation, 9.6 g of a colorless and transparent product was obtained, which was the ester-based perfluoropolyether compound (M1): CF 3 (OCF 2 CF 2 ) r (OCF 2 ) s OCF 2 CH 2 OCH 2 COOC 4 h 9 ...

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Abstract

The invention relates to a perfluoropolyether group-containing silane compound represented by a formula (1): Rf-X1-X2-NQkT2-k(1), and a preparation method therefor. The invention also relates to a perfluoropolyether group-containing silane compound shown in the description, and a preparation method therefor. The invention also relates to a perfluoropolyether group-containing silane compound represented by a formula (3) shown in the description, and a preparation method therefor. The perfluoropolyether group-containing silane compound can be used for a surface treatment agent so that the glassand other base materials processed by the surface treatment agent are excellent in anti-pollution, anti-fingerprint, scrape-resistant and wear-resistant performances, and the preparation methods for the compounds are simple in process, and are easy to operate and implement.

Description

technical field [0001] The invention relates to the field of surface treatment agents, in particular to a perfluoropolyether group-containing silane compound and a preparation method thereof, a surface treatment agent containing the perfluoropolyether group-containing silane compound and articles treated with the surface treatment agent. Background technique [0002] It is known in the prior art that when a silane compound containing a perfluoropolyether group is used to treat a substrate, it can form a film layer on its surface that is hydrophobic, oleophobic, anti-fouling, low friction coefficient and durable. On the one hand, it is Due to the low surface energy characteristics of perfluoropolyether in the molecule, on the other hand, the siloxane group in the molecule can undergo dehydration condensation reaction on the surface of the substrate to form chemical bonds and combine. The surface treatment agent containing the composition is evenly dispersed on the base materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/00C08G65/337C08G65/336C03C17/34C09D171/00C09D5/16
CPCC03C17/34C08G65/00C08G65/336C08G65/337C09D5/1662C09D171/00
Inventor 陈以静王其观
Owner GUANGZHOU UR MATERIALS TECH CO LTD
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