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US 5,176,983 AGranted
Polymeric nitrones having an acrylic backbone chain
AssigneeAllied-Signal Inc.
InventorsKeith A. Horn, Christine L. Lau
Life of this patent
Estimating the term…
Abstract
Homopolymers and copolymers with an acrylic backbone chain having pendant side-chains containing a nitrone functional group undergo change in refractive index upon exposure to actinic radiation. Waveguides are "written"in films containing such polymers by exposing predtermined areas to sufficient actinic radiation to change the refractive index.
Claims18
A polymeric nitrone of the composition ##STR4## wherein (a) n is an integer greater than 10;
- (b) m is 0-0.99;
- (c) R.sup.1 and R.sup.2, which are the same or different, are H or C.sub.1 -C.sub.20 alkyl, straight chain, branched or cyclic, with the proviso that when R.sup.1 and/or R.sup.2 represent an alkyl group other than methyl, then its alpha-carbon always represents a --CH.sub.2 -- group;
- (d) R.sup.3 is a saturated C.sub.1 -C.sub.20 aliphatic, aromatic or mixed aliphatic/aromatic hydrocarbon group;
- (e) Z is
- (i) a C.sub.1 -C.sub.20 alkyl group, straight chain, branched or cyclic;
- or
- (ii) ##STR5## wherein r is 0 or 1, and wherein R.sup.4 and R.sup.5, which are the same or different, are selected from the group consisting of H, F, Cl, Br, I, --CN, --NO.sub.2, --NH.sub.2, --R.sup.6, --NR.sup.6.sub.2, --OR.sup.6, and --CH.dbd.CH.dbd.COOR.sup.6 wherein R.sup.6 is a C.sub.1 -C.sub.20 alkyl group, straight chain, branched or cyclic.
4 more elements
Dependencies are inferred from the claim text.