Polyurethane latexes from sulfonate prepolymer, aqueous chain extension process, and coated support
US4110284A · kind A · utility
20Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1974 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Oct 11, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2861
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process of preparing anionic polyurethane latexes without the addition of a foreign emulsifying surface active agent comprising rendering the basic polyester or polyether constituent of the latex intrinsically emulsifiable or dispersible in water by incorporating an anionic functional group in the chain thereof and reacting this basic constituent with a diisocyanate in order to obtain a prepolymer which is then emulsified in water. The latexes obtained are advantageously applied in coating and impregnation processes, finishing of leather, and as binders for nonwoven fabrics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.