Wrinkled absorbent particles of high effective surface area having fast absorption rate
US5744564A · kind A · utility
31Cited by
10References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1993 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Nov 4, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/26
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The subject invention pertains to large particle size, attrition-resistant, continuous, but wrinkled, high surface area aqueous fluid absorbent polymers, preferably of a crosslinked acrylic acid or acrylate. These absorbents have absorption rates superior to spherical absorbents. The subject invention further pertains to a process of preparing such polymers comprising suspension polymerization with an at least partially off phase soluble initiator. The subject invention further pertains to absorbent structures containing such polymers and to the use of such polymers therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.