Continuous process for preparing a polyurethane latex
US5959027A · kind A · utility
18Cited by
22References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1998 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Mar 17, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyurethane/urea/thiourea latex having a narrow molecular weight polydispersity and sub-micron particle size can be prepared by first preparing a high internal phase ratio (HIPR) emulsion of a polyurethane/urea/thiourea prepolymer, then contacting the emulsion with a chain-extending reagent under such conditions to form the polymer latex.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.