Azo dyes having a high solubility in petroleum fuels
AssigneeMorton-Norwich Products, Inc.
InventorRichard B. Orelup
Life of this patent
Estimating the term…
Abstract
Azo dyes which are highly soluble in petroleum fuels. The dyes have the general formula ##STR1## where R.sub.1, R.sub. 2, R.sub. 3, and R.sub.4 are each H or CH.sub. 3 and R.sub. 5 is either 2-ethylhexyl or 2-ethylhexyloxypropyl. When R.sub. 5 is 2-ethylhexyl, then at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3. When R.sub.5 is 2-ethylhexyloxypropyl, then each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is H, or at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3 provided that R.sub.1 and R.sub.3 are not both CH.sub.3 at the same time that R.sub.2 and R.sub.4 are each H, and provided that R.sub.2 and R.sub.4 are not both CH.sub.3 at the same time that R.sub.1 and R.sub.3 are both H.
Claims21
An azo dye having a high solubility in petroleum fuels and having the formula ##STR20## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each H or CH.sub.3 and R.sub.5 is either 2-ethylhexyl or 2-ethylhexyloxypropyl, wherein:
- A. when R.sub.5 is 2-ethylhexyl, then at least one of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3 ;
- B. when R.sub.5 is 2-ethylhexyloxypropyl, then each of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is either, H or CH.sub.3 provided that R.sub.1 and R.sub.3 are not both CH.sub.3 at the same time when R.sub.2 and R.sub.4 are both H, or R.sub.2 and R.sub.4 are not both CH.sub.3 at the same time when R.sub.1 and R.sub.3 are both H.
An azo dye having a high solubility in petroleum fuels and having the formula ##STR21## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each H or C.sub.3 with the proviso that at least one of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3.
An azo dye having a high solubility in petroleum fuels and having the formula ##STR22## in which each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is H or CH.sub.3, with the proviso that R.sub.1 and R.sub.3 are not both CH.sub.3 at the same time when R.sub.2 and R.sub.4 are both H, and R.sub.2 and R.sub.4 are not both CH.sub.3 at the same time when R.sub.1 and R.sub.3 are both H.
A colored petroleum fuel having dissolved therein an azo dye composition having the general formula ##STR23## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each H or CH.sub.3 with the proviso that at least one of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3.
A colored petroleum fuel having dissolved therein an azo dye composition having the formula ##STR24## in which each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is H or CH.sub.3, with the proviso that R.sub.1 and R.sub.3 are not both CH.sub.3 at the same time when R.sub.2 and R.sub.4 are both H, and R.sub.2 and R.sub.4 are not both CH.sub.3 at the same time when R.sub.1 and R.sub.3 are both H.
Dependencies are inferred from the claim text.