Dyestuff composition: disperse or vat dye and lignin sulphonate
US4551151A · kind A · utility
12Cited by
15References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1984 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Apr 16, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K23/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Improved dyestuff compositions are disclosed herein comprising, as dispersants, sulfonated lignins prepared by selectively isolating lignins having molecular weights greater than 5,000 and subsequently reacting the lignin with sodium sulfite and an aldehyde.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.