Method of preparing a super absorbent polymer and a super absorbent polymer prepared therefrom
US9156974B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2013 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Nov 15, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of preparing a super absorbent polymer (SAP) includes the steps of preparing a first hydrogel polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; preparing a second hydrogel polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and milling the first hydrogel polymer and distributing the first hydrogel polymer into a fine powder having a particle diameter below 150 μm and a base resin having a particle diameter of 150 μm to 850 μm; fabricating a reassembled body of the fine powder by mixing the fine powder and the second hydrogel polymer; and mixing the reassembled body of the fine powder with the first hydrogel polymer, and drying and milling the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.