-
公开(公告)号：DE602004002202T2
公开(公告)日：2007-01-04
申请号：DE602004002202
申请日：2004-03-19
Applicant: BASF AG
Inventor： HERFERT NORBERT , AZAD M , CARRICO W , WOODRUM T , MITCHELL A , KIKAMA MA-IKAY
Abstract: A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The superabsorbent polymer is prepared using a sulfinic acid derivative, like 2-hydroxy-2-sulfinatoacetic acid, a salt thereof, or a mixture thereof, as the reducing agent in a polymerization initiator system for the preparation of a superabsorbent polymer from monomers. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.
-
Patent Agency Ranking
公开(公告)号：DE69820405D1
公开(公告)日：2004-01-22
申请号：DE69820405
申请日：1998-05-05
Applicant: BASF AG
Abstract: A new and improved method of manufacturing an acrylic acid superabsorbent polymer, that is manufactured by any known technique, except that the acrylic acid monomer is polymerized to substantial completion before neutralization, and neutralization is accomplished by admixing a solid, e.g., powdered or granular, neutralizing agent into the acrylic acid polymer. Preferably, the neutralizing agent is a solid, non-hydroxide neutralizing agent, such as sodium carbonate, potassium carbonate, ammonium carbonate or mixtures thereof. Cross-linking may be accomplished during polymerization, simultaneously with neutralization, or cross-linking may be carried out in a separate processing step subsequent to neutralization, or both.
-
公开(公告)号：DE602004002202D1
公开(公告)日：2006-10-12
申请号：DE602004002202
申请日：2004-03-19
Applicant: BASF AG
Inventor： HERFERT NORBERT , AZAD M , CARRICO W , WOODRUM T , MITCHELL A , KIKAMA MA-IKAY
Abstract: A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The superabsorbent polymer is prepared using a sulfinic acid derivative, like 2-hydroxy-2-sulfinatoacetic acid, a salt thereof, or a mixture thereof, as the reducing agent in a polymerization initiator system for the preparation of a superabsorbent polymer from monomers. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.
-
-
-
公开(公告)号：DE69820405T2
公开(公告)日：2004-05-27
申请号：DE69820405
申请日：1998-05-05
Applicant: BASF AG
Abstract: A new and improved method of manufacturing an acrylic acid superabsorbent polymer, that is manufactured by any known technique, except that the acrylic acid monomer is polymerized to substantial completion before neutralization, and neutralization is accomplished by admixing a solid, e.g., powdered or granular, neutralizing agent into the acrylic acid polymer. Preferably, the neutralizing agent is a solid, non-hydroxide neutralizing agent, such as sodium carbonate, potassium carbonate, ammonium carbonate or mixtures thereof. Cross-linking may be accomplished during polymerization, simultaneously with neutralization, or cross-linking may be carried out in a separate processing step subsequent to neutralization, or both.
-
-
-
-
-
Search Results
6
records
(took 0.02 seconds)
