High molecular weight substituted amides from polycarboxylic acids
US5395897A · kind A · utility
2Cited by
11References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1994 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Apr 25, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention comprises a process for synthesizing a high molecular weight hydroxamic acid polymer and other substituted amides onto a polyacrylic acid or a polymethacrylic acid latex backbone by reacting a stable, inverse polyacrylic acid or polymethacrylic acid latex with hydroxylamine sulfate, in the case of hydroxamic acid, or other primary amines, to produce the high molecular weight substituted amides. The invention further comprises a method of clarifying Bayer process liquors using the substituted amides produced by the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.