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Fluorine-contained surfactant and preparation method thereof

A technology of surfactants and initiators, which is applied in the field of block polymers, fluorine-containing surfactants and their preparation, can solve problems such as difficulty in industrial production, impact on polymer performance, and complicated preparation process, and achieve excellent surface activity , fast polymerization speed and pure product

Inactive Publication Date: 2014-09-03
无锡市恒创嘉业纳米材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the RAFT polymerization method has the characteristics of mild reaction conditions, the RAFT reagent (sulfur-containing substance) added during the polymerization process will remain in the final polymer, which is difficult to remove and has a certain impact on the performance of the polymer.
At the same time, the preparation process of RAFT reagent is complicated, and the industrial production is difficult

Method used

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  • Fluorine-contained surfactant and preparation method thereof
  • Fluorine-contained surfactant and preparation method thereof
  • Fluorine-contained surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Using diethyl ether as a solvent, 1'-ethoxyethoxy)propyl chloride and metal lithium undergo lithiation reaction in a high vacuum device to prepare (1'-ethoxyethoxy)propyllithium.

[0038] Polymerization adopts high vacuum (-3 Pa) and sealed anionic polymerization experiment technology. In the high vacuum polymerization device, 100 ~ 150mL THF is used as the polymerization solvent, 1.0mL 0.5mol / L 3 (1'-ethoxyethoxy) propyllithium is the initiator, and the initiator and C 3 f 7 CH 2 CH 2 CH 2 OCOCH=CH 2 (Molar ratio 1:1.2) After polymerization for 1 to 3 hours, quickly cool to -78°C with a liquid nitrogen / isopropanol bath, then slowly add 5.0 to 15.0 g of methyl styrene, and add 0.02 g of methyl styrene after polymerization for 0.5 to 1 hour. g CH 3 OH terminates the reaction. The reacted polymer is subjected to rotary evaporation at 60-70°C to remove the solvent, precipitation and purification with n-hexane, repeated three times, and finally dried in a vacuum oven...

Embodiment 2～4

[0040] Except for changing the type of fluorine-containing monomer in Example 1, the initiator, solvent, second monomer, and polymerization temperature are the same as those described in Example 1. Wherein the fluorine-containing monomers used are respectively: (CF 3 ) 2 CF(CF 2 ) 2 C(CH 3 ) 2 OCOCH=CH 2 , (CF 3 ) 3 CCF 2 CH 2 C(CH 3 ) 2 OCOCH=CH 2 、CF 3 CF 2 CF 2 (CF 3 ) CFCH 2 CH 2 CH 2 CH 2 OCOCH=CH 2 . The number average molecular weight of the obtained polymer is 9000-10000.

Embodiment 5～8

[0042] Except for changing the type of fluorine-containing monomer and the second monomer in Example 1, the initiator, solvent, and polymerization temperature are the same as those described in Example 1. Wherein the second monomer used is 4-cyanophenyl acrylate, and the first monomers containing fluorine are respectively: The number average molecular weight of the obtained polymer is 1000-100000.

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Abstract

The invention discloses a fluorine-containing surfactant and a preparation method thereof. The fluorine-containing surfactant of the present invention is a block copolymer obtained by anionic polymerization of fluorine-containing monomers and non-fluorine-containing monomers such as acrylates. Compared with the prior art, the fluorine-containing surfactant of the present invention has a block structure and excellent surface activity, the product is pure, does not introduce active groups or catalysts, and the polymerization temperature is low, the polymerization speed is fast, and it will have a very wide range of Application prospects, especially in the field of leveling has a very prominent effect.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a fluorine-containing surfactant and a preparation method thereof, in particular to a block polymer composed of a fluorine-containing monomer and a monomer not containing fluorine atoms. Background technique [0002] A fluorosurfactant is a fluoropolymer. Due to the special physical and chemical properties of fluorine, compared with traditional surfactants, fluorine-containing surfactants have more advantages, such as: high surface activity, high heat resistance and high chemical stability, its Fluorine-containing hydrocarbon groups are both water-repellent and oil-repellent, so fluorine-containing surfactants have the highest surface activity among all surfactants so far. The addition of very low levels of fluorosurfactants can greatly reduce the surface tension of water. Solve some phenomena such as edge shrinkage, shrinkage cavity, and crater caused by low surface energy or oil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/36C08F297/02G03F7/004C09K23/36
Inventor 邹玥
Owner 无锡市恒创嘉业纳米材料科技有限公司