ヘキサフルオロプロピレンオキシドの重合

Japanese Patent JP5774470

B2

Process for the oligomerization of hexafluoropropylene oxide (HFPO) in which the sum of the dimers, trimers, tetramers, pentamers and hexamers represents less than 20% of the weight of the polymerized HFPO, the oligomers other than the dimers, trimers, tetramers, pentamers and hexamers (the remaining oligomers) having an average molecular weight ranging between 1100 and 4000 g/mol, characterized in that the process comprises the steps of contacting hexafluoropropylene oxide (HFPO) at a temperature between -30° C. to +50° C. with a catalyst system selected from potassium fluoride and di-, tri- or tetraethyleneglycol-dimethylether in the presence of a solvent which is selected from perfluorinated aliphatic or aromatic hydrocarbon with more than 3 and less than 12 C-atoms and optionally a polar group but not comprising chlorine or bromine partially fluorinated aliphatic or aromatic hydrocarbon with more than 3 and less than 12 C-atoms and optionally a polar group but not comprising chlorine or bromine at a pressure of less than 3 bars by controlled monomer addition continuous feeding or by adding the monomer in one or two portions (shots).

JPWO2010035571	Antireflection layer composition, antireflection film, polarizing plate, and image display device
WO/2017/002560	POLYETHER COPOLYMER AND METHOD FOR PREPARING SAME
WO/2020/078423	FLUORINE-CONTAINING CATIONIC POLYMERIZATION MONOMER, AND SYNTHESIS AND APPLICATION THEREOF

Dannes Bernard

JP2011501223A

September 09, 2015

March 25, 2009

Click for automatic bibliography generation  

Clariant Finance (BV) Limited

C08G65/22

JP60156726A
JP10101788A
JP2008531815A
JP2097526A

WO2006093885A1

Mitsufumi Esaki
Blacksmith
Katsunori Uenishi
Ichiro Torayama

Previous Patent: 液面レベル計測装置、方法及びプログラム

Next Patent: BODY CONSTRUCTION OF REINFORCED-CONCRETE/STEEL- FRAME-BUILT COMPOSITE CONSTRUCTION