Dust reducer consisting of multi-component metal compound, water absorbing agent containing multi-component metal compound, and method for producing the same
US9974882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2013 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Feb 14, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
[Problem] To provide a dust reducer which suppresses blocking against moisture absorption and has a reduced amount of dust generation, without impairing the water absorption physical properties that are required from a water absorbing agent, such as water absorption capacity under load; a method for producing a water absorbing agent using the dust reducer; and a water absorbing agent in which blocking against moisture absorption is suppressed and which has a reduced amount of dust generation. [Solution] A dust reducer for a water absorbing agent containing a surface crosslinked polyacrylic acid (salt)-based water absorbent resin as a main component, wherein the dust reducer is a multi-component metal compound which has a hydrotalcite structure and contains a hydroxyl group and two kinds of metal cations that are divalent and trivalent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.