Dust control of absorbent polymers
US6090875A · kind A · utility
36Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1996 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Feb 16, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2300/14
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The subject invention provides water-swellable polymer compositions having reduced dusting tendencies, i.e., reduced amounts of unassociated dust having a maximum diameter less than or equal to 10 microns and/or the tendency to generate reduced amounts of unassociated dust having a maximum diameter less than or equal to 10 microns upon attrition and a process for preparing such compositions. Hydrophobic dedusting agents are used to achieve the above while substantially maintaining or increasing the surface tension of an aqueous fluid in equilibrium with the polymer and air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.