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US 5,352,757 AGranted
Sulfur compounds and new polymers obtained from these sulfur compounds
AssigneeRhone-Poulenc Chimie
InventorsSylvie Lavault, Gerard Velleret
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Abstract
The present invention relates to new sulfur compounds which are polyol esters of mercaptocarboxylic acids. It also relates to the use of these sulfur esters for preparing polymers exhibiting a refractive index higher than 1.50. The manufacture of optical discs and of waveguides may be mentioned among the optical applications of these polymers.
Claims33
Sulfur compounds of general formula (I):
- ##STR10## in which:
- R.sub.1 denotes a linear or branched alkylene radical containing 1 to 3 carbon atoms,
- A denotes a hydrocarbon residue of valency n, chosen from the radicals of formulae:
- ##STR11## n denotes 2, 3 or 5.
1 more element
Dependencies are inferred from the claim text.