Polyurethane/thiourethane-based optical resin and process for producing the same
US7932327B2 · kind B2 · utility
1Cited by
4References
8Claims
0Family size
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Key dates
| Filing date | Aug 4, 2006 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Oct 10, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a process which can be carried out upon the production of a polyurethane/thiourethane-based resin with the use of a polyisocyanate compound, a polyol compound, and a polythiol compound, without causing abrupt heat generation or viscosity increase. At least one polyol compound having at least one ether bond and two or more hydroxy groups in a molecule is used as the polyol compound, whereby a large heat generation or an abrupt viscosity increase are prevented from occurring upon blending monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.