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公开(公告)号：ZA200505518B
公开(公告)日：2006-10-25
申请号：ZA200505518
申请日：2005-07-08
Applicant: BASF AG
Inventor： GERHARD NESTLER , JOACHIM M LLER-ENGEL KLAUS , STEFAN WICKEL
IPC: A61L20090101 , A61L15/60 , C07C20090101 , C08F20090101 , C08F8/00 , C08F20/06 , C08J3/12
Abstract: Preparation of low odor hydrogel-forming polymerisate based on acrylic acid involving preparation of a polymeric hydrogel by radical polymerization of acrylic acid containing monomer in an aqueous polymerization medium and conversion of the hydrogel into a particulate hydrogel or hydrogel forming powder, and treatment of these with a crosslinking substance having at least two latent functional groups reactive to the polymerisate carboxyl groups is new. A process for preparation of low odor hydrogel-forming polymerisate based on acrylic acid including the steps; (a) preparation of a polymeric hydrogel by radical polymerization of at least 50 wt.% of acrylic acid containing monomer composition in an aqueous polymerization medium and conversion of the hydrogel into a particulate hydrogel or a hydrogel forming powder, and optionally treatment of these with a crosslinking substance having at least two latent functional groups reactive to the polymerisate carboxyl groups, where in step (a) the acrylic acid contains at least 500 ppm of acrylic acid oligomer.
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公开(公告)号：ZA911671B
公开(公告)日：1992-11-25
申请号：ZA911671
申请日：1991-03-07
Applicant: BASF AG
Inventor： NIESSNER MANFRED , MANFRED NIESSNER , WICKEL STEFAN , STEFAN WICKEL , SCHNEIDER WALTER , WALTER SCHNEIDER , BECK JUERGEN , JUERGEN BECK , HARTMAN HEINRICH , HEINRICH HARTMAN , MEYER THOMAS , THOMAS MEYER
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公开(公告)号：ZA9101671B
公开(公告)日：1992-11-25
申请号：ZA9101671
申请日：1991-03-07
Applicant: BASF AG
Inventor： NIESSNER MANFRED , MANFRED NIESSNER , WICKEL STEFAN , STEFAN WICKEL , SCHNEIDER WALTER , WALTER SCHNEIDER , BECK JUERGEN , JUERGEN BECK , HARTMAN HEINRICH , HEINRICH HARTMAN , MEYER THOMAS , THOMAS MEYER
CPC classification number: C08F2/10
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