Process for the production of a layer of self-cicatrizing polyurethane, and products obtained
US5091214A · kind A · utility
5Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1990 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Jun 5, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31601
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A coating layer of a thermohardening polyurethane having self-cicatrization properties is prepared by preparing a reactive mixture of an isocyanate component which is a diisocyanate or a mixture of diisocyanate monomers capable of forming an isocyanate trimer, a polyol monomer having a functionality of at least 2 and a trimerization catalyst; placing the reactive mixture onto a support for formation of said layer; heating the reactive mixture to a temperature sufficient to initiate trimerization; and then further heating the reactive mixture to initiate and conduct polymerization thereby forming said polyurethane layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.