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Polymerization of hexafluoropropylene oxide

A technology of hexafluoropropylene oxide and hexafluoropropylene, which is applied in the field of polymerization of hexafluoropropylene oxide and can solve problems such as low polymerization degree

Inactive Publication Date: 2008-02-27
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it has been found difficult to obtain HFPO oligomers having a low degree of polymerization and containing a small or minimal amount of oligomers with a degree of polymerization of 4 or less

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Catalyst 11.6g KF and 501g diglyme

[0022] Reaction temperature 0°C

[0023] HFPO / HFP 596g put into the reactor

[0024] The amount of the lower phase 266g

Embodiment 2

[0026] Catalyst 11.6g KF and 501g diglyme

[0027] Reaction temperature 0°C

[0028] 1100g of HFPO / HFP put into the reactor

[0029] The amount of the lower phase 563g

Embodiment 3

[0031] Catalyst 11.6g KF and 501g diglyme

[0032] Reaction temperature 0°C

[0033] 2100g of HFPO / HFP put into the reactor

[0034] The amount of lower phase 1057g

[0035] The following table lists the results obtained:

[0036] Composition of lower phase (GC result, area %)

[0037] Composition determined by analysis *

[0038] * HFPO oligomers with n<5 were not detected in the resulting composition.

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PUM

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Abstract

The present invention provides a process for oligomerization of hexafluoropropylene oxide, the process comprising polymerizing a mixture of hexafluoropropylene oxide and hexafluoropropene in the presence of an aprotic organic solvent using KF as a catalyst.

Description

[0001] Cross References to Related Patent Applications [0002] This patent application claims priority from European Patent Application No. 05101610.3, filed March 2, 2005, which is hereby incorporated by reference in its entirety. technical field [0003] This invention relates to the polymerization of hexafluoropropylene oxide (HFPO). In particular, the present invention relates to a process for the polymerization of HFPO that produces a desired degree of polymerization and a small amount of low molecular weight HFPO oligomers. Background technique [0004] Polymerization or oligomerization of HFPO results in perfluoropolyethers that find use in a variety of applications. For example, the resulting perfluoropolyethers can be used in the manufacture of surfactants, or in the preparation of fluorochemicals suitable for treating a variety of substrates to render them oil and / or water repellent. Generally, relatively low degrees of polymerization, i.e. oligomers of HFPO, ar...

Claims

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Application Information

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IPC IPC(8): C08G65/22
CPCC08G65/226
Inventor 沃尔那·施韦特费格克劳斯·欣策埃贡·奥伯迈尔
Owner 3M INNOVATIVE PROPERTIES CO
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