Invention Application
- Patent Title: Foams made from water-absorbing, basic polymers, method for the production and utilization thereof
- Patent Title (中): 由吸水性碱性聚合物制成的泡沫体,其生产和利用方法
-
Application No.: US10502212Application Date: 2003-01-30
-
Publication No.: US20050070616A1Publication Date: 2005-03-31
- Inventor: Samantha Champ , Hans-Joachim Hahnle , Martin Beck , Rudiger Funk
- Applicant: Samantha Champ , Hans-Joachim Hahnle , Martin Beck , Rudiger Funk
- Priority: DE10204980.7 20020206
- International Application: PCT/EP03/00927 WO 20030130
- Main IPC: A61F13/53
- IPC: A61F13/53 ; A61F13/00 ; A61F13/15 ; A61F13/49 ; A61L15/00 ; C08J9/12 ; C08J9/28 ; C08J9/30 ; C08K3/00 ; C08K5/00 ; C08L101/14 ; C08J9/00

Abstract:
Foams composed of water-absorbing basic polymers, obtainable by (I) foaming a crosslinkable aqueous mixture including (a) at least one basic polymer whose basic groups have optionally been neutralized, (b) at least one crosslinker, (c) at least one surfactant, (d) optionally at least one solubilizer, (e) optionally thickeners, foam stabilizers, fillers, fibers and/or cell nucleators, and (f) optionally particulate water-absorbing acidic polymers, by dissolving a gas which is inert toward free radicals in the crosslinkable aqueous mixture under a pressure from 2 to 400 bar and subsequently decompressing the crosslinkable aqueous mixture to atmospheric or by dispersing fine bubbles of a gas which is inert toward free radicals, and (II) crosslinking the foamed mixture to form a hydrogel foam and if applicable adjusting the water content of the polymer foam to 1-60% by weight. Preparation of the foams by application of the abovementioned measures (I) and (II) and use of the thus obtainable foams in hygiene articles to absorb body fluids, in dressing material to cover wounds, as a sealing material, as a packaging material, as a soil improver, as a soil substitute, to dewater sludges, to absorb aqueous acidic wastes, to thicken waterborne paints or coatings in the course of disposing of residual quantities thereof, to dewater water-containing oils or hydrocarbons or as a material for filters in ventilation systems.
Public/Granted literature
- US07838567B2 Foams made from water-absorbing, basic polymers, method for the production and utilization thereof Public/Granted day:2010-11-23
Information query
IPC分类: