发明授权
- 专利标题: Superabsorbants with controlled absorption speed
- 专利标题(中): 超吸收剂具有受控吸收速度
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申请号: US09403030申请日: 1999-10-21
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公开(公告)号: US06395830B1公开(公告)日: 2002-05-28
- 发明人: Gerd Jonas , Klaus Pflueger , Richard Mertens
- 申请人: Gerd Jonas , Klaus Pflueger , Richard Mertens
- 优先权: DE19716657 19970421
- 主分类号: C08F832
- IPC分类号: C08F832
摘要:
The invention relates to hydrophilic, highly swellable polymers for aqueous fluids, e.g. superabsorbants, which are coated with reactive, water-insoluble, film-forming, hydrophobic polymers and an additional reactive constituent which can react with carboxyl groups of carboxylate anions and form additional cross-links on the particle surface. The invention also relates to the production of superabsorber thus coated and their use in hygiene articles used to absorb body fluids. The products obtained by coating highly swellable, hydrophilic, insoluble polymers with reactive, water-insoluble, film-forming, hydrophobic polymers and an additional reactive component are characterized in that their absorption speed cam be adjusted in an controlled manner extended area according to the type and amount of reactive, water-insoluble, film-forming, hydrophobic polymers used in the coating and according to process engineering conditions chosen for said coating.