Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 7, 2003
Grant Date -
N/A
app pub date -
Aug 28, 2000
filing date -
Feb 26, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention contains a process for the surface postcrosslinking of water-absorbing polymers in which the polymers are treated with a surface postcrosslinking solution and during or after the treatment are postcrosslinked by means of an increase in temperature and are dried, wherein the crossiinker comprises a bis-2-oxazolidinone or a poly-2-oxazolidinone comprising structural units of the formula ##STR1## in which R.sup.1 is branched or unbranched C.sub.1 -C.sub.18 -alkylene, branched or unbranched C.sub.2 -C.sub.18 -alkenylene, C.sub.5 -C.sub.18 -cycloalkylene, phenylene, naphthylene, anthracenylene, hydrocarbon-substituted phenylene, naphthylene or anthracenylene or another substituted or unsubstituted C.sub.6 -C.sub.18 -arylene radical, R.sup.2 is branched or unbranched C.sub.1 -C.sub.18 -alkylene and n is an integer from 1 to 50 or a mixture of bis-2-oxazolidinones and poly-2-oxazolidinones dissolved in an inert solvent.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully