Methods for preparing polyurethanes
US8207286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2009 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Oct 10, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2605/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides methods for preparing polyurethanes from reaction components including: (a) reacting about 1 equivalent of at least one polyisocyanate; and about 0.1 to about 0.5 equivalents of at least one polyol having 2 to 18 carbon atoms to form an isocyanate functional urethane prepolymer; and (b) reacting the isocyanate functional urethane prepolymer, about 0.05 to about 1.0 equivalents of at least one branched polyol having 4 to 18 carbon atoms and at least 3 hydroxyl groups; and up to about 0.9 equivalents of at least one polyol different from the branched polyol and having 2 to 18 carbon atoms, wherein the reaction components are essentially free of polyester polyol and polyether polyol, as well as methods for preparing polyurethanes using a one pot process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.