High refractive index and high photosensitive optical materials and method for preparing the same
US6653425B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2002 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Nov 27, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L25/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is directed to the preparation of vinyl sulfide compounds of general formula —(—R1—S—R4C═CR5—R3—S—)n—(—R2—S—R4C═CR5—R3—S—)m, where m and n are integers in the range of 1-1000, are formed by the addition of a dithiol compound of general formula HS—R1—SH to an acetylenic compound of general formula HC≡C—R3—S—R2≡S—R3—C—CH2. These vinyl sulfide compounds can be homopolymerized or copolymerized with second monomers, oligomers or polymers that are capable of reacting with their carbon-carbon double bond. The vinyl sulfide compounds have a high refractive index (1.60 or higher at 632 nm) and can be used to make optical telecommunication elements and devices. They are soluble in selected solvents and such solutions can be applied to substrates by various methods such as spin coating, dipping, spraying and other methods known in the art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.