摘要:
A recording layer including a novel organic compound for a high density optical recording medium is provided. The information may be recorded on the recording layer at a 2× speed or higher speed with a relatively lower writing power so that heat distribution of the recording layer in the irradiated area is not likely to become steep both in time and space. The organic compound incorporated in the recording layer has the following general chemical structural formula (I).
摘要:
The present invention provides a disazo compound of the formula (I) or a salt thereof wherein A represents 4-sulfophenyl or 6,8-disulfo-2-naphtyl, one of R1 and R2 represents hydrogen or methyl. The present invention also provides a dye-based polarizing film comprising a base material and the disazo compound of the formula (I) or the salt thereof contained in the base material.The disazo compound of the present invention provides a polarizing film, which is excellent in light resistance and initial polarizing performance, particularly light resistance when used as a polarizing element.
摘要:
An electrophotographic photoreceptor comprising: (1) an electrophotographic photosensitive layer which comprises a charge carrier transporting compound and a charge carrier generating compound, or (2) an electrophotographic photosensitive layer which comprises a charge carrier transporting compound layer and a charge carrier generating compound layer, on an electrically conductive support, wherein said charge carrier generating compound is a bis-azo compound represented by formula (I): ##STR1## wherein, Ar.sup.1, Ar.sup.2, Ar.sup.5 and Ar.sup.6 represent aryl groups, Ar.sup.3 and Ar.sup.4 represent arylene groups, and R.sup.1 represents a hydrogen atom or an SO.sub.3 Na group.
摘要:
Water-soluble compounds having fiber-reactive dye properties of the general formula ##STR1## in which A is an alkylene of 2 to 6 carbon atoms or a phenylene which can be substituted by 1 or 2 substituents, or is a radical of the formula ##STR2## in which W is a direct bond or a bridge member and the R' and R* each denote hydrogen, chlorine, methyl, methoxy, ethoxy, carboxy or sulfo;B is chlorine or fluorine;R is hydrogen, chlorine, an alkyl of 1 to 4 carbon atoms or an alkoxy of 1 to 4 carbon atoms;M is hydrogen or an alkali metal;n stands for the number zero, 1 or 2,K is a radical of the formula ##STR3## in which D is phenylene which can be substituted by chlorine, bromine, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, carboxy or sulfo, or is naphthalene with optionally 1 or 2 sulfo groups,R.sup.1 denotes hydrogen, chlorine, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms,R.sup.2 is hydrogen or alkyl of 1 to 4 carbon atoms,G is carboxy, methyl or carbalkoxy of 2 to 5 carbon atoms,Y denotes vinyl, .beta.-sulfatoethyl, .beta.-phosphatoethyl, .beta.-thiosulfatoethyl or .beta.-chloroethyl,Z is the .alpha.- or .beta.-bromoacryloyl or .beta.-chloropropionyl or a radical of the formula ##STR4## with B, D and Y of the abovementioned meanings. The novel dyes are suitable for dyeing hydroxyl- and/or carbamoyl-containing material; on hydroxyl-containing material, such as cellulose fibers, they become fixed not only in the alkaline but also in the weakly acid to neutral range, so that they can be used together with disperse dyes for dyeing blend material composed of cellulose and polyester fibers by the dyeing methods for disperse dyes.
摘要:
The description is concerned with a liquid crystal composition of the guest-host type which contains a pleochroic dye dissolved therein. The dye molecule has an end group or end groups in the molecule represented by the general formula: ##STR1## where Ro designates a straight chain of alkyl group, in which methylene group not adjacent to the nitrogen atom may be substituted by oxygen atom or sulfer atom; R1 designates an alkyl group having a chain length different from that of the alkyl group of Ro or a group ##STR2## in R1 a methylene group not adjacent to the nitrogen atom may be substituted by oxygen atom or sulfur atom, and R2 designates hydrogen atom, alkyl group, alkoxy group, cycloalkyl group or dialkylamino group.
摘要:
An electrophotographic photoconductor comprising, on an electroconductive support material, a photoconductive layer containing a bisazo pigment having a phenanthrenequinone substituent, which electrophotographic photoconductor exhibits relatively high photosensitivity and usefullness for electrophotographic copying.
摘要:
WATER-SOLUBLE AZO-PYRIMIDINE DYESTUFFS OBTAINED BY COUPLING DIAZO OR TETRAZO COMPOUNDS DERIVED FROM AROMATIC MONOAMINES OR DIAMINES IN AN EQUIVALENT RATIO OF ABOUT 1:1 WITH AN OPTIONALLY SUBSTITUTED 2.4.6-TRIAMINOPYRIMIDINE COMPOUND WHICH CAN BE COUPLED IN THE 5-POSITION, OR IN AN EQUIVALENT RATIO OF 1:2 WITH IDENTICAL OR DIFFERENT 2,4,6-TRIAMINO-PYRIMIDINE COMPOUNDS OF THIS TYPE, OR WITH ONE EQUIVALENT OF SUCH A TRIAMINO-PYRIMIDINE COMPOUND AND ONE EQUIVALENT OF ANOTHER COUPLING COMPONENT AND, IN THE CASE OF COUPLING COMPONENTS CONTAINING DIAZOTIZABLE AMINO BROUPS, THE DISAZO DYESTUFFS RESULTING FROM COUPLING SUCH DIAZOTIZED AMINOAZO-PYRIMIDINE DYESTUFFS WITH ANOTHER COUPLING COMPONENT, OR DYESTUFFS OBTAINED BY COUPLING TWO EQUIVALENTS OF THE AFORESAID DIAZOTIZED MONOAMINES WITH A COUPLING COMPONENT COMPRISING TWO PYRIMIDYL NUCLEI LINKED TOGETHER VIA A HYDRAZINO BRIDGE OR VIA CERTAIN ORGANIC BRIDGE MEMBERS, THE COMPONENTS BEING SO CHOSEN THAT THE FINAL DYESTUFF CONTAINS AT LEAST ONE SALT-FORMING, WATER SOLUBILIZING GROUP WHICH DIS SOCIATES ACID IN WATER AND AT LEAST THREE RINGS PER MOLECULE, WHICH ARE NOT FUSED WITH ONE ANOTHER, AND OF WHICH PREFERABLY AT LEAST TWO ARE CARBOCYCLIC OR HETEROCYCLIC AND OF AROMATIC CHARACTER AND THE THIRD CAN BE AROMATIC, OR A PARTLY UNSATURATED OR A SATURATED ALICYCLIC RING. SAID DYE STUFFS PRODUCE POLYAMIDE DYEINGS HAVING GOOD FASTNESS TO LIGHT AND ABRASION AND EXCELLLENT WET-FASTNESS PROPERTIES AND WHEN THEY CONTAIN FIBER-REACTIVE SUBSTITUENTS, THE AZOPYRIMIDINE DYESTUFFS CAN ALSO BE USED FOR THE DYEING OF CELLULOSE FIBERS ON WHICH THEY AFFORD DYEINGS HAVING GOOD WET-FASTNESS PROPERTIES, ESPECIALLY FASTNESS TO WASHING.