公开(公告)号：BRPI0409725A

公开(公告)日：2006-05-02

申请号：BRPI0409725

申请日：2004-04-23

Applicant: STOCKHAUSEN INC

Inventor： SMITH SCOTT J ,  JOY MARK C ,  HSU WHEI-NEEN ,  FRANK MARKUS

IPC: A61L15/60

Abstract: The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomers carrying acid groups, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which has a high gel bed permeability and high centrifuge retention capacity.

公开(公告)号：BRPI0417784A

公开(公告)日：2007-03-20

申请号：BRPI0417784

申请日：2004-12-16

Applicant: STOCKHAUSEN INC

Inventor： JOY MARK C ,  HSU WHEI-NEEN

IPC: A61F13/15 ,  A61L15/60

Abstract: The invention relates to a superabsorbent polymer wherein an increased rate of water absorption is obtained by the addition of an encapsulated blowing agent. The invention relates to a superabsorbent polymer including an encapsulating blowing agent and having a vortex time of 40 seconds or less. In particular, the superabsorbent polymer includes from about 55 to about 99.9 wt. % of polymerizable unsaturated acid group containing monomers; from about 0.001 to about 5.0 wt. % of internal crosslinking agent; wherein the composition has a degree of neutralization of more than about 20%; and from about 0.05 to about 10.0 wt. % of an encapsulated blowing agent.