Amphiphilic macromolecular emulsifier with switchable surface activity and use thereof in preparation of polymer latex
US9624317B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Dec 21, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2438/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A macromolecular emulsifier with switchable surface activity, and use thereof for preparation of polymer latex is disclosed. By using the macromolecular emulsifier with switchable surface activity as an emulsifier, a reversibly coagulable and re-dispersible polymer latex can be prepared by emulsion polymerization. The polymer latex can achieve the coagulation of latex particles by heating and aerating with nitrogen, air, inert gas and/or adding a small amount of alkali solution; the coagulated latex particles can be restored and re-dispersed into stable latex by aerating with carbon dioxide and/or adding a small amount of acid solution. The coagulation and re-dispersion process is reversible and is easy to control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.