Production of novel condensates comprising bisphenols and aromatic aminosulfonic acids, condensates and dispersant, additive and water-reducing agent based thereon
US5153299A · kind A · utility
2Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1990 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Aug 14, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/912
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A production method of novel condensates comprising bisphenols and aromatic aminosulfonic acids, in particular, novel 4-aminobenzenesulfonic acid-2, 2-bis(4-hydrocyphenyl)propaneformaldehyde type condensate and said condensate itself are disclosed. Uses of condensates as a dispersant for disperse dye, additive for carbonaceous fine powder-water slurry and water-reducing agent for cement are also claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.