Polyurethanes made with copper catalysts
US9035012B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Jul 5, 2011 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Jan 27, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyisocyanate-based polymers are formed by curing a reaction mixture containing at least one polyisocyanate and at least one isocyanate-reactive compound having at least two isocyanate-reactive groups in the presence of a copper catalyst that contains at least one copper atom associated with a polydentate ligand that contains at least one nitrogen-containing complexing site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.