Polyurethane based adhesive for polarizing structure and polarized lens
US10669459B2 · kind B2 · utility
0Cited by
8References
12Claims
0Family size
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Key dates
| Filing date | Mar 20, 2013 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Sep 20, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3025
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A polyurethane based adhesive containing one polyol compound derived from caprolactone monomer having a number average molecular weight between 200 and 1000 combined with a polyisocyanate compound. The functionality of the polycaprolactone polyol is between 1 and 4. Other aspects include a polarizing layered structure, a polarized lens and a method for manufacturing same all of which include the polyurethane based adhesive. The adhesive avoids delamination and is useful in optical applications where it will be in contact with water, for example during surfacing or edging process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.