Process for making water-swellable material comprising...

A - Human Necessities – 61 – L

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

A61L 15/00 (2006.01) A61L 15/42 (2006.01) A61L 15/60 (2006.01) C08J 9/00 (2006.01)

Patent

CA 2534258

This invention is directed to a process for making solid, typically particulate, water-swellable material comprising coated water-swellable, preferably hydrogel-forming polymers, which are coated with a coating agent, which is such that it does not rupture when the polymers swell in a liquid, e.g. water or saline water. Hereto, the coating agent is extensible in wet state and comprises thereto a wet-extensible material that has a wet- elongation of at least 400%, or even more preferably at least 500%, and preferably a tensile stress at break in the wet state of at least 1MPa. Typically, the coating agent comprises thereto an elastomeric polymeric material. The invention also relates to solid (particulate) water-swellable material obtainable by the process of the invention.

La présente invention concerne un procédé d'élaboration d'une matière gonflable dans l'eau, généralement particulaire, solide contenant des polymères formant de préférence des hydrogels, gonflables dans l'eau recouverts par un agent de revêtement spécifique qui ne se rompt pas, lorsque les polymères se dilatent dans un liquide, tel que l'eau ou l'eau saline. Ledit agent de revêtement est donc dilatable à l'état humide et il contient une matière dilatable à l'état humide qui possède un allongement à l'état humide d'au moins 400 %, voire même d'au moins 500 % et, de préférence, une contrainte de traction au niveau de la rupture à l'état humide d'au moins 1MPa. Généralement, ledit agent de revêtement contient une matière polymère élastomère. Cette invention a aussi trait à une matière gonflable dans l'eau (particulaire) solide pouvant être obtenue par le procédé susmentionné.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for making water-swellable material comprising... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for making water-swellable material comprising..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making water-swellable material comprising... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1945727

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.