Photochromic polyurethane laminate
US9726785B2 · kind B2 · utility
1Cited by
2References
32Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 19, 2015 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Jun 19, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2551/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Photochromic polyurethane laminates and methods for the formation of same wherein the photochromic polyurethane layer of the laminate has been crosslinked with a isocyanate-active prepolymer using a crosslinking agent. The crosslinking agent is formulated to have at least three functional groups that are reactive with functional groups of the polyurethane or of the isocyanate-active prepolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.