C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 8/30 (2006.01) A61L 15/00 (2006.01) A61L 15/60 (2006.01) C08G 73/06 (2006.01) C08J 3/24 (2006.01)
Patent
CA 2319453
The invention relates to a method for surface subsequent cross-linking of water absorbing polymers. The invention is characterized in that the polymers are treated with a surface subsequent cross-linking solution and are subsequently cross-linked and dried during or after treatment by increasing the temperature. The invention is additionally characterized in that the cross- linking agent contains a bis-2-oxazolidinone or a poly-2-oxazolidinone which is dissolved in an inert solvent and which comprises structural units of general formula (I), wherein R1 is a branched or unbranched C1-C18-alkylene, a branched or unbranched C2-C18-alkenylene, C5-C8-cycloalkylene, phenylene, naphthylene, anthracenylene, phenylene substituted with hydrocarbons, naphthylene or anthracenylene or another substituted or non-substituted C6-C18- arylene radical; R2 is a branched or unbranched C1-C18-alkylene, and; n is a whole number from 1 to 50. In addition, the cross-linking agent can also contain a mixture of bis-2-oxazolidinones and poly-2-oxazolidinones dissolved in an inert solvent.
L'invention concerne un procédé de postréticulation superficielle de polymères absorbeurs d'eau, qui se caractérise en ce que les polymères sont traités avec une solution de postréticulation superficielle et sont postréticulés et séchés pendant ou après le traitement par augmentation de la température. Le procédé se caractérise en outre en ce que l'agent de réticulation contient une bis-2-oxazolidinone ou une poly-2-oxazolidinone, contenant des unités structurelles de la formule générale (I) dans laquelle R?1¿ désigne alkylène C¿1?-C¿18? ramifié ou non ramifié, alkénylène C¿2?-C¿18? ramifié ou non ramifié, cycloalkylène C¿5?-C¿8?, phénylène, naphtylène, anthracénylène, phénylène substitué par des hydrocarbures, naphtylène ou anthracénylène ou un autre reste arylène C¿6?-C¿18? substitué ou non substitué, R?2¿ désigne alkylène C¿1?-C¿18? ramifié ou non ramifié et n vaut un nombre entier compris entre 1 et 50. L'agent de réticulation peut aussi contenir un mélange de bis-2-oxazolidinones et de poly-2-oxazolidinones dissous dans un solvant inerte.
Daniel Thomas
Engelhardt Friedrich
Frenz Volker
Funk Rudiger
Riegel Ulrich
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
LandOfFree
Method for cross-linking hydrogels with bis- and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for cross-linking hydrogels with bis- and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for cross-linking hydrogels with bis- and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1560828