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Superabsorbent polymer with crosslinker

A superabsorbent polymer, a technology of absorbent polymer, applied in the field of superabsorbent polymer, granular superabsorbent polymer composition, can solve problems such as slow absorption rate

Inactive Publication Date: 2014-09-10
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The superabsorbent polymers disclosed in these patents have slow absorption rates due to the presence of ionic crosslinks

Method used

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  • Superabsorbent polymer with crosslinker
  • Superabsorbent polymer with crosslinker
  • Superabsorbent polymer with crosslinker

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Experimental program
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Effect test

Embodiment 1-240 and comparative example 1-36

[0251] According to Tables 1-12 including Examples 1-240 and Comparative Examples C1-C36, for Examples 1-240, internal crosslinker compositions 1-12 were added to the monomer solution of the superabsorbent polymer composition, and The particulate superabsorbent polymer was further processed with surface crosslinking and optional surface treatment as indicated in the table below.

[0252] The following nomenclature for particulate superabsorbent polymer compositions is used in the following table: SX means surface crosslinking, pretreatment before SX means application of elements to the surface of the superabsorbent polymer particles; posttreatment after SX means surface Surface treatment of crosslinked superabsorbent polymer particles; EC means ethylene carbonate. The performance units of the particulate superabsorbent polymer composition are CRC (g / g); AUL (0.9 psi) (g / g); GBP (Darcy); AAP (0.7 psi) (g / g) and SFC (10 -7 *cm 3 *s*g -1 ). All % in the tables mean % by weigh...

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Abstract

The present invention further relates to a particulate superabsorbent polymer composition comprising a crosslinker composition that is the reaction product selected from (i) saturated amines and / or saturated polyamines with ethylenically unsaturated glycidyl compounds and / or ethylenically unsaturated polyglycidyl compounds, (ii) ethylenically unsaturated amines and / or ethylenically unsaturated polyamines with saturated glycidyl compounds and / or saturated polyglycidyl compounds, or (iii) ethylenically unsaturated amines and / or ethylenically unsaturated polyamines with ethylenically unsaturated glycidyl compounds and / or ethylenically unsaturated polyglycidyl compounds; and a surface crosslinking agent applied to the particle surface. The present invention further relates to an absorbent article that includes such particulate superabsorbent polymer compositions.

Description

Background of the invention [0001] The present invention relates to superabsorbent polymers, particulate superabsorbent polymer compositions, as well as processes for preparing such products and absorbent articles comprising such products. Examples of superabsorbent polymers may include cross-linked partially neutralized polymers, including cross-linked polyacrylic acid or cross-linked starch-acrylic acid graft polymers, according to the general definition of superabsorbent polymers, which follow the hydrogel Swells and forms to be able to absorb large quantities of aqueous liquids and bodily fluids such as urine or blood, and to retain aqueous liquids under pressure. Superabsorbent polymers can be formed into granules, commonly referred to as particulate superabsorbent polymers, wherein the particulate superabsorbent polymers can be post-processed with surface crosslinking, surface treatment, and other treatments to form particulate superabsorbent polymer compositions. The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06A61L15/00
CPCA61F2013/15463Y10T428/31855B01J20/28016A61F13/53B01J2220/445C08F220/06B01J20/3085A61L15/24C08F222/1006A61F2013/530299B01J20/267B01J2220/68B01J20/3028A61L15/60B01J20/28026C08F222/103Y10T428/2982C08F2/10C08F220/04C08J3/24C08L33/14C08F220/325
Inventor M·诺曼S·A·麦金托什F·舒伯特C·鲁瓦克
Owner EVONIK DEGUSSA GMBH
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