Lignin composition, method of producing the same and dispersing agent for cement used the same
US5811527A · kind A · utility
22Cited by
4References
10Claims
0Family size
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Key dates
| Filing date | Sep 30, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Sep 30, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/408
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A lignin composition having a content of aluminum or iron or both at 0.05 to 5 wt. % (based on the solids of the lignin solution) and a content of extracts with chlorotrifluoroethylene dimer at 0.01 to 0.4 wt. % (based on solids in lignin solution). The lignin compositions possess high surface tension and are suitable as dispersing agents for cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.