Nonlinearly optically active polymers
AssigneeRhone-Poulenc Chimie
InventorsGerard Mignani, Pascal Barthelemy, Remi Meyrueix
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Abstract
Novel nonlinearly optically active polymers, well suited for electrooptical applications, are prepared by copolymerizing a first difunctional monomer with a second difunctional comonomer, with at least one of such difunctional monomers including a polar charge transfer moiety containing at least one electron acceptor group and at least one electron donor group (D), and further wherein the polymerizable functional groups are borne by the one or more electron donor groups (D).
Claims10
A nonlinearly optically active polymer, which comprises the copolymerizate of a first difunctional monomer with a second difunctional comonomer, with at least one of said difunctional monomers comprising a polar charge transfer moiety having the following formula (I):
- D-(radical with disclosed electrons)-A (I)
- in which A is an electron acceptor radical comprising a nitro, cyano, --CO.sub.2 R.sub.5 or PO.sub.3 (R.sub.5).sub.2 radical, wherein R.sub.5 is a lower alkyl radical;
- D is an electron donor radical, wherein the electron donor radical provides the reactive functions for the polymerizable functional groups, the polymerizable functional groups attached to said electron donor and said other difunctional monomer have alcohol, amine, allyl, vinyl or acid functions;
- and said radical with dislocated electrons have one of the formulae:
- ##STR12## in which R.sub.3, R.sub.4 and R.sub.6, which may be identical or different, are each a hydrogen atom or a lower alkyl radical.
Dependencies are inferred from the claim text.