Continuous process for preparing a polyurethane latex
US6087440A · kind A · utility
7Cited by
24References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1999 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Feb 16, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/00
- 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 solids (between about 65% and 74% solids) latex 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.