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US 5,310,922 AGranted
Squaraine dyes
AssigneeSyntex (U.S.A.) Inc.
InventorsJohn Pease, Thomas L. Tarnowski, Donald Berger, Chiu C. Chang, Chun-Hua Chuang
Life of this patent
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Abstract
Novel squaraine dyes and compositions of matter containing such dyes are disclosed. The novel squaraine dyes have an absorption maximum greater than 600 nanometers and are particularly useful in conjunction with a helium/neon (He/Ne) laser. Some of the squaraine dyes are hydrophilic and are therefore water soluble or water compatible and others of the squaraine dyes are lipophilic.
Claims2
A compound of the formula ##STR19## wherein:
- Z is S;
- R.sub.10 and R.sub.11 are independently selected from the group consisting of
- hydrogen,
- alkyl (1 to 20 carbon atoms),
- cycloalkyl of from 5 to 20 atoms, ##STR20## hydrogen, or lower alkyl (1 to 4 carbon atoms) and v is 0 to 5, and ##STR21## .beta..sub.1 and .beta..sub.2 are independently hydrogen, chlorine, bromine, fluorine or lower alkoxy (1 to 4 carbon atoms), with the proviso that only one of .beta..sub.1 or .beta..sub.2 is hydrogen or chlorine, bromine or fluorine when R.sub.10 and R.sub.11 are both hydrogen or lower alkyl of 1 or 2 carbon atoms.
2 more elements
A compound of the formula ##STR22## wherein:
- (a) R'".sub.10 and R'".sub.11 are --CH.sub.2 (CH.sub.2).sub.2 CH.sub.3 and .beta..sub.1 and .beta..sub.2 are hydrogen;
- or
- (b) R'".sub.10 and R'".sub.11 are --CH.sub.2 (CH.sub.2).sub.14 CH.sub.3 and .beta..sub.1 and .beta..sub.2 are hydrogen;
- or
- (c) R'".sub.10 and R'".sub.11 are --CH.sub.2 CH.sub.3 and .beta..sub.1 and .beta..sub.2 are --OCH.sub.2 CH.sub.3.
2 more elements
Dependencies are inferred from the claim text.