Back to results
US 4,985,528 AGranted
Novel nonlinearly optically active polyurethanes
AssigneeRhone-Poulenc Chimie
InventorsGerard Mignani, Pascal Barthelemy, Remi Meyrueix
Life of this patent
Estimating the term…
Abstract
Novel nonlinearly optically active polyurethane polymers, well suited for electrooptical applications, have recurring structural units of the formula: ##STR1## in which m is a number greater than 5; R.sub.1 and R.sub.2, which may be identical or different, are each a saturated or unsaturated alkyl or aromatic radical; R.sub.3 is a linear aliphatic, or cyclic aromatic or arylaliphatic hydrocarbon radical; and Y is a group including a radical containing dislocated .pi. electrons and an electron acceptor group (A).
Claims15
A polyurethane polymer comprising recurring structural units of the formula:
- ##STR11## in which m is a number greater than 5;
- R.sub.1 and R.sub.2, which may be identical or different, are each a saturated or unsaturated alkyl or aromatic radical;
- R.sub.3 is a linear aliphatic, or cyclic aromatic or arylaliphatic hydrocarbon radical;
- and Y is a group which comprises a radical containing dislocated .pi. electrons and an electron acceptor group (A).
1 more element
Dependencies are inferred from the claim text.