Porous super absorbent polymer and preparation method thereof
US10934400B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2017 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Jun 18, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure relates to a preparation method of a porous super absorbent polymer exhibiting excellent absorption performance and improved absorption rate due to a novel pore structure, and a porous super absorbent polymer prepared therefrom. The porous super absorbent polymer includes a base resin powder including a cross-linked polymer of a water soluble ethylene-based unsaturated monomer containing acidic groups which are at least partially neutralized, and an inorganic filler contained in the cross-linked structure of the cross-linked polymer, wherein the base resin powder includes a plurality of pores having a diameter of a sub-micron (sub-μm) scale in the cross-linked structure, and an interconnected pore structure in the form of an open channel in which 90% or more of the pores are connected to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.