[54] POLYMERIC COMPOSITION CONTAINING CARBOXY NUEUTRALIZED WITH LITHIUM OR POTASSIUM
[75] Inventors: Sandra M. Yarbrough, Appleton;
Ramakant T. Shet; Ronald S.
Harland, both of Neenah, all of Wis.
[73] Assignee: Kimberly-Clark Corporation,
Neenah, Wis.
[21] Appl. No.: 519,629
[22] Filed: May 7, 1990
[51] Int. CI.5 C08F 20/06; C08F 8/42
[52] U.S. CI 525/327.8; 525/330.2;
536/56; 536/102
[58] Field of Search 525/327.8, 330.2, 329.4,
525/329.5, 329.6; 536/56, 102
[56] References Cited
U.S. PATENT DOCUMENTS
4.173,669 11/1979 Ashida 525/330.2
4,732,721 3/1988 Konno 525/330.2
4.959.061 9/1990 Cabestany 604/368
5,026,784 6/1991 Le-Khac 525/327.6
US005241009A
[ii] Patent Number: 5,241,009 [45] Date of Patent: Aug. 31, 1993
FOREIGN PATENT DOCUMENTS
0050375 4/1982 European Pat. Off. .
0171041 2/1986 European Pat. Off. .
0292341 11/1988 European Pat. Off. .
Primary Examiner—Christopher Henderson
Attorney, Agent, or Firm—Thomas J. Mielke
[57] ABSTRACT
A polymeric composition specifically adapted to absorb blood and other proteinaceous fluids and having repeating units, said polymeric composition comprising pendant neutralized carboxyl groups (salts) and pendant carboxyl groups. The polymeric composition is characterized in that the ratio of pendant neutralized carboxyl groups to pendant carboxyl groups is within the range of from about 1:9 to about 9:11, at least about 20 mole percent of the repeating units comprise a pendant neutralized carboxyl group or a pendant carboxyl group, and at least about 50 percent of the pendant neutralized carboxyl groups have been neutralized with a potassium or lithium base.
12 Claims, 4 Drawing Sheets
