Air activated organotin catalysts for polyurethane synthesis
US7919423B2 · kind B2 · utility
7Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2010 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Feb 2, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to an organotin-based catalyst system for polyurethane synthesis that is useful in coatings applications. The catalyst has low activity in the absence of oxygen. When a coating mixture comprising the catalyst is sprayed and/or applied to a substrate as a thin film in air, the catalyst is activated. For solvent-based refinish systems comprising hydroxyl and isocyanate species at high solids levels, the catalyst system therefore provides extended viscosity stability, i.e., pot life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.