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  4. Polymermembranen auf der Basis von Polyvinylidenfluorid, Verfahren zu deren Herstellung und deren Verwendung
 
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Patent
Title

Polymermembranen auf der Basis von Polyvinylidenfluorid, Verfahren zu deren Herstellung und deren Verwendung

Other Title
Polymermembranes based on polyvinylidene fluoride, a method of their production and their use
Abstract
The invention relates to polymer membranes based on polyvinylidene fluoride (PVDF), a method of their production and their use for ultrafiltration. Using known techniques, the membranes are made from homogeneous solutions comprising between 5 and 30 per cent PVDF by weight and between 0.01 and 30 per cent sulphonic acids and/or their salts by weight; these salts are obtained by sulphonating the polyether ketones of formula (I) or by subsequent neutralization of the sulphonic acids. The membranes are then treated with methanolic solutions comprising between 0.1 and 5 per cent of the above-mentioned sulphonic acids and/or their salts by weight. This process yields membranes with excellent hydrophilic properties, high thermal and mechanical stability and high transmembrane flows. -(-O-p-C<-6 H<-4 -O-p-C<-6 H<-4 -CO-p-C<-6 H<-4 -)<-n -
Inventor(s)
Groebe, A.  
Chmiel, H.  
Link to Espacenet
http://worldwide.espacenet.com/publicationDetails/biblio?DB=worldwide.espacenet.com&locale=en_EP&FT=D&CC=DE&NR=3904544A
Patent Number
1989-3904544
Publication Date
1990
Language
German
Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB  
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