Ionic superabsorbent polymers with enhanced swelling...

Details Ionic superabsorbent polymers with enhanced swelling... Ionic superabsorbent polymers with enhanced swelling...

2005-02-15

2005-02-15

Sanders, Kriellion A. (Department: 1714)

Stock material or miscellaneous articles

Composite

Of polyamide

C428S500000, C523S105000, C524S157000, C524S238000, C604S358000

Reexamination Certificate

active

06855434

ABSTRACT:
Ionic superabsorbent polymers having increased swelling capacity of salt-containing solutions are disclosed. The ionic superabsorbent polymers of the present invention contain an additive to increase the osmotic activity of the polymer in the presence of a salt-containing solution. The additive used in combination with the ionic superabsorbent polymer is capable of forming a zwitterion at a pH of from about 1 to about 9, has a dipole moment greater than that of water, and has a molecular weight less than about 10,000 grams/mole.

REFERENCES:
patent: 5300192 (1994-04-01), Hansen et al.
patent: 5308896 (1994-05-01), Hansen et al.
patent: 5352480 (1994-10-01), Hansen et al.
patent: 5998032 (1999-12-01), Hansen et al.
patent: 6080806 (2000-06-01), Bett et al.
patent: 6395395 (2002-05-01), Hansen et al.
patent: 6639120 (2003-10-01), Wallajapet et al.
patent: 0 637 594 (1995-02-01), None
patent: WO 9519191 (1995-07-01), None
patent: WO 9631644 (1996-10-01), None
patent: WO 9930751 (1999-06-01), None
Öztop, et al., Influence of Some Aromatic Amino Acids on the Swelling Behavior of Acrylamide/Maleic Acid Hydrogel, Polymer Bulletin, 1998, 40:575-581.
International Search Report from PCT/US03/02267 dated Aug. 18, 2003.

Affiliated with

Also associated with

Rating

Ionic superabsorbent polymers with enhanced swelling... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ionic superabsorbent polymers with enhanced swelling..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ionic superabsorbent polymers with enhanced swelling... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3472771