Method for producing super absorbent polymer and super absorbent polymer
US10799851B2 · kind B2 · utility
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3References
10Claims
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Key dates
| Filing date | Jun 15, 2017 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Jun 28, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a super absorbent polymer having more improved absorbency under pressure and liquid permeability, and a method for producing the same. The super absorbent polymer comprises a base polymer powder including a cross-linked polymer of a monomer containing a water-soluble ethylenically unsaturated compound or its salt; and a surface cross-linked layer that is formed on the base polymer powder and is further cross-linked from the cross-linked polymer, wherein a glass hollow particle having a micron-scale particle size is included on the surface cross-linked layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.