Water absorbent resin composition and production method thereof
US7960469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2004 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Jun 23, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2013/530744
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The production method of a water absorbent resin composition including a particulate water absorbent resin, wherein: 95 wt % or more of particles whose particle diameter is less than 850 μm and not less, than 106 μm are contained, and a weight average particle diameter of the particles is less than 500 μm and not less than 300 μm and a logarithmic standard deviation (σξ) of a particle size distribution is 0.45 or less, and a water-soluble component of the water absorbent composition is 35 wt % or less, and a multivalent metal component is contained, and an extraction rate of the multivalent metal component is 5.0 wt % or more and less than 100 wt %, thereby providing the water absorbent resin composition, free from any coagulation of particles in high humidity, which has superior absorbent property in terms of an absorbency and a diffusing absorbency under pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.