Manufacturing method for blocked aqueous dispersion of polyurethanes
US5863983A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1997 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Aug 25, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2101/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A blocked hydrophilic polyurethane with molecular weight of 500.about.40,000, 5.about.70% solid content and 5.about.200 milliequivalent per 100 g polymer of sulfonic acid salt, can be prepared from following reactants: PA1 a. Organic isocyanates; PA1 b. Polyols, including polyether polyol, polyester polyol, polycarbonate, and polycaprolactone, that can participate in the polyaddition reactions with isocyanates. PA1 c. Polyols containing sulfonate group. PA1 d. Organic blocking agents capable of reacting with isocyanates. The blocked hydrophilic PU resins formed from above reactants can be applied for the anti-wrinkle treatment of cellulosic textiles with excellent performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.