Novel nonlinearly optically active polyurethanes

Details Novel nonlinearly optically active polyurethanes Novel nonlinearly optically active polyurethanes

1989-09-18

1991-01-15

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 75, 528 85, C08G 1867

Patent

active

049855280

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).

REFERENCES:
patent: 4454309 (1984-06-01), Gould et al.

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