Back to results
US 4,009,193 AGranted
Bisstyrylaryl compounds
AssigneeBASF SE
InventorsHorst Scheuermann, Walter Stilz
Life of this patent
Estimating the term…
Abstract
Bisstyryl-substituted aryl compounds of the formula (I): ##STR1## where X is arylene and R.sup.1 and R.sup.5 are substituents common to the dye art. The compounds are useful as optical brighteners, particularly for acrylonitrile polymers, and give excellent whitening having good fastness properties.
Claims3
A compound of the formula ##STR50## wherein X is 1,4-phenylene, 1,4-phenylene substituted by chloro, methyl or methoxy or 4,4'-diphenylene,
- R.sup.1 is hydrogen, chloro, methyl, methoxy, ethoxy, cyano or methoxycarbonyl,
- R.sup.3 and R.sup.4 are alkyl of 1 to 4 carbon atoms, chloro-, methoxy-, .beta.-ethoxy-, .beta.-acetoxy- or .beta.-cyanoethyl, benzyl or phenylethyl,
- R.sup.5 is alkyl of 1 to 4 carbon atoms, hydroxyalkyl of 2 to 3 carbon atoms, .beta.-hydroxy-.gamma.-chloropropyl, .beta.-cyanoethyl or alkoxycarbonylethyl of 1 to 4 carbon atoms in the alkoxy, and
- A.sup.- is the chloride, bromide, iodide, methosulfate, ethosulfate, benzenesulfonate or p-toluenesulfonate anion where R.sup.5 is said alkyl of 1 to 4 carbon atoms, or A.sup.- is the formate, acetate, propionate or benzoate anion where R.sup.5 is said hydroxyalkyl of 2 to 3 carbon atoms, .beta.-hydroxy-.gamma.-chloropropyl, .beta.-cyanoethyl or alkoxycarbonylethyl of 1 to 4 carbon atoms in the alkoxy.
1 more element
Dependencies are inferred from the claim text.