04654039 is referenced by 197 patents and cites 9 patents.

The present invention relates to improved hydrogel-forming polymer compositions which can be used as absorbents in absorbent structures and absorbent articles such as diapers, sanitary napkins and the like. Such hydrogel-forming polymer compositions are substantially water-insoluble, slightly cross-linked, partially neutralized polymers which are prepared from unsaturated polymerizable, acid group-containing monomers and cross-linking agents. These hydrogel-forming polymer materials, upon imbibing fluids, form hydrogels. Such polymer materials have relatively high gel volume and relatively high gel strength as measured by shear modulus of the hydrogel which forms therefrom. Such polymer materials also contain relatively low levels of extractable polymer material which can be extracted therefrom by contact with synthetic urine. Preferred hydrogel-forming polymers having these characteristics can be prepared by polymerizing the acid group-containing monomers in their free acid form at relatively low monomer concentrations, preferably using relatively low polymerization temperatures. Absorbent structures and absorbent articles containing these dried hydrogel-forming polymer materials are also disclosed.

Title
Hydrogel-forming polymer compositions for use in absorbent structures
Application Number
6/746152
Publication Number
4654039
Application Date
June 18, 1985
Publication Date
March 31, 1987
Inventor
Thomas A Inglin
Cincinnati
OH, US
Stephen A Goldman
Cincinnati
OH, US
Kerryn A Brandt
Cincinnati
OH, US
Agent
Steven J Goldstein
Jack D Schaeffer
George W Allen
Assignee
The Proctor & Gamble Company
OH, US
IPC
A61F 13/16
View Original Source