Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of synthesizing polyethylene glycol perfluoroolefin methyl ether

A technology of perfluoroalkenyl methyl ether and polyethylene glycol, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., to achieve the effect of simple synthesis method, high reaction conversion rate and high purity

Inactive Publication Date: 2007-08-15
ZHEJIANG UNIV OF TECH
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no literature related to the preparation of polyethylene glycol perfluoroalkenyl methyl ether

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 50 mL of cyclohexane and 30 g of hexafluoropropylene trimer into a four-neck flask, heat to 60° C., and stir until completely dissolved. Then add 5 g of N,N-xylidine, under stirring, while heating, slowly add polyethylene glycol monomethyl ether (HO(CH 2 CH 2 O) 13 CH 3 , 40g) ethanol solution, the temperature was controlled at 75°C, and the reaction was carried out for 2 hours. The solvent was distilled off to obtain viscous liquid C 9 f 17 O(CH 2 CH 2 O) 13 CH 3 . The surface tension of its 0.1% aqueous solution is 22.1 mN / m.

Embodiment 2

[0022] Add 50 mL of n-heptane and 20 g of hexafluoropropylene dimer into a four-neck flask, heat to 30° C., and stir until completely dissolved. Then add 5g of pyridine, under stirring, while heating, slowly add polyethylene glycol monomethyl ether (HO(CH 2 CH 2 O) 13 CH 3 , 40g) in ethanol solution, the temperature was controlled at 30°C, and the reaction was carried out for 3 hours. The solvent was distilled off to obtain viscous liquid C 6 f 11 O(CH 2 CH 2 O) 13 CH 3 . The surface tension of its 0.1% aqueous solution is 25.3 mN / m.

Embodiment 3

[0024] Add 60 mL of carbon tetrachloride and 40 g of tetrafluoroethylene tetramer into a four-neck flask, heat to 70° C., and stir until completely dissolved. Then add piperidine 5g, under stirring, while heating, slowly add polyethylene glycol monomethyl ether (HO(CH 2 CH 2 O) 6 CH 3 , 33g) in ethanol solution, the temperature was controlled at 70°C, and the reaction was carried out for 1 hour. The solvent was distilled off to obtain viscous liquid C 8 f 15 O(CH 2 CH 2 O) 6 CH 3 . The surface tension of its 0.1% aqueous solution is 24.7mN / m.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Surface tensionaaaaaaaaaa
Login to View More

Abstract

The invention discloses a synthesizing method of carbowax full fluorine alkylene methyl ether, which comprises the following steps: putting poly glycol methyl ether and full fluoro-olefin oligomerisation body into nonpolar solvent; reacting completely under the function of organic amine activator at 30-100 deg.c; steaming out solvent; getting CnF2n-1O(CH2CH2O)mCH3; setting n as 6-12 intact number and m as 4-24 intact number; making mass ratio of full fluoro-olefin oligomerisation body : poly glycol methyl ether at 1 : 1-1.2; making usage of organic amine activator at 0.1-1.2 double of poly glycol methyl ether.

Description

(1) Technical field [0001] The invention relates to a method for synthesizing polyethylene glycol perfluoroalkenyl methyl ether. (2) Background technology [0002] Fluorocarbon surfactants are the most important varieties of special surfactants. Its unique properties are often summarized as "three highs" and "two phobias", namely high surface activity, high heat resistance stability and high chemical stability; Its fluorine-containing hydrocarbon group is both water-repellent and oil-repellent [New Chemical Materials, 2004, 32(8): 46]. It has the highest surface activity among all surfactants at present, and it is mainly used in special occasions with high technical requirements or in fields where ordinary surfactants are difficult to do and the application effect is poor. Fluorine-containing nonionic surfactants are an important type of fluorine-containing surfactants, and their polar groups are usually composed of a certain number of oxygen-containing ether bonds or hydro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G65/48C07C41/48C07C43/16B01F17/42C09K23/42
Inventor 史鸿鑫项菊萍徐春柳
Owner ZHEJIANG UNIV OF TECH