Sulfur-containing (thio)ether (co)polymer and a use thereof
US6320020A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1999 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Sep 3, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A sulfur-containing (thio)ether (co)polymer comprising repetitive structural units represented by general formulas 1 and 2, and an optical element using the (co)polymer: ##STR1## PA1 where A and B are bivalent organic group; R.sup.1 and R.sup.2 are hydrogen or alkyl; X.sup.1 to X.sup.4 are oxygen or sulfur; Y.sup.1 and Y.sup.2 are halogen, hydroxy, --OR.sup.3 or --SR.sup.4, in which R.sup.3 is sulfur-containing alkyl, aryl, heterocycle or acyl optionally having a substituent other than SH; and R.sup.4 is alkyl, aryl, heterocycle or acyl; provided that --OR.sup.3 and/or --SR.sup.4 constitute 10 to 100% of the total of Y.sup.1 +Y.sup.2. The (co)polymer exhibits good optical, mechanical and thermal properties and a higher refractive index, and may be prepared in a good productivity. The sulfur-containing (thio)ether (co)polymer is useful for manufacturing a variety of optical elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.