Abstract: The present invention relates to specific pentamethine cyanine azo complex dye compounds and their use as dyes in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength from 630 to 670 nm. The invention further relates to an optical layer comprising said dyes and to a write only read many (WORM) type optical recording medium capable of recording and reproducing information with radiation of a red laser, which employs said pentamethine cyanine azo complex type dye in the optical layer.

Abstract: The invention relates to the use of dyestuff salts of indolinium diazamethine type cations with azo metal complex anions based on pyridinones in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength up to 450 nm. The invention further relates to a write once read many (WORM) type optical data recording medium capable of recording and reproducing information with radiation of blue laser, which employs dyestuff salts of indolinium diazamethine type cations with azo metal complex anions based on pyridinones in the optical layer.

Abstract: The present invention relates to pyridinone based azo dyes and/or of anionic azo metal complex dye salts made thereof with cationic basic yellow dyes, which are characterized by an unsaturated bond in beta-position to the endocyclic N atom of the pyridinone, and to their use in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength up to 450 nm. The invention further relates to a write once read many (WORM) type optical data recording medium capable of recording and reproducing information with radiation of blue laser, which employs pyridinone based azo dyes and/or anionic azo metal complex dye salts made thereof with cationic basic yellow dyes, which are characterized by an unsaturated bond in beta-position to the endocyclic N atom of the pyridinone, in the optical layer.

Abstract: The present invention relates to the use of Basic Yellow dyes as dye component for optical data recording media. In a preferred aspect the present invention relates to Basic Yellow dyes together with a metalazo complex dye as dye components for optical data recording media. In a more preferred aspect, the invention relates to a write once read many (WORM) type optical data recording medium capable of recording and reproducing information with radiation of blue laser of preferably 405 nm, which employs a Basic Yellow dye together with a metalazo complex dye and a further recording dye in the optical layer.

Abstract: The invention relates to a pigment dispersion consisting essentially of a) at least one organic or inorganic pigment or a combination of the same, b) an alpha-methyl--omega-hydroxy-polyethylene glycol ether having an average molar mass of between 250 and 1000 g/mol, c) standard dispersing agents for producing aqueous pigment dispersions, d) water, and e) optionally other standard additives.

Abstract: The invention relates to addition compounds of formula (1): in which: n is a number from 1 to 10; R1 and R2 are identical or different and are each a hydrogen atom or a saturated or unsaturated aliphatic radical having 1 to 4 carbon atoms; R3 and R4 are identical or different and are each a hydrogen atom or alkyl having 1 to 3 carbon atoms, and the bridge member (R3+R4) is in each case positioned ortho or meta in relation to the phenolic oxygen atom; Z represents a group —CH2—CH2—, —CH2—CH(CH3)—, —CH(CH3)—CH2— or a combination thereof; s is number from 1 to 200; B represents hydrogen, —CO—CH?CH—COOM, —COCH(SO3M)CH2COOM, —CO—CH2—CH(SO3M)—COOM, —SO3M, —SO2M and/or —PO3MM, whereby M is preferably a cation selected from the group Li+, Na+, K+, NH4+, HO—CH2—CH2—NH3+, (HO—CH2—CH2—)2NH2+ or (HO—CH2—CH2—)3NH+; and Y is a radical of an amine. The inventive addition compounds are used as dispersing agents of solids, for example, pigments, particularly in aqueous media.

Abstract: The invention relates to pigment preparations containing (a) at least one organic or inorganic pigment; (b) at least one cyclic imide of general formula (1) wherein R1 represents a linear-chain, branched or cyclic aliphatic radical having 10 to 30—preferably 12 to 25—carbon atoms, or an alkenyl radical having 10 to 30—preferably 12 to 25—carbon atoms, the aforementioned radicals being able to be substituted by at least one, e.g. 2, 3, 4 or 5, substituent from the group consisting of C1-C6-alkyl, C1-C6-alkoxy, C6-C10-aryl, hydroxy, carboxy, and sulfo, R2, R3, R4 and R5 are the same or different and represent hydrogen, C1-C10-alkyl, C1-C10-alkoxy, halogen, OR6, NR6R7, —COOR6, —CONR6R7, —NR6—COR7, SO2NR6R7, —SO3M, —NO2, —CN or CF3, R6 and R7 representing H or an alkyl radical having 1 to 10 C atoms and M representing an equivalent of a cation having a valency of 1 to 3; and (c) optionally further standard additives.

Abstract: The invention relates to addition compounds of formula (1) in which: n is a number from 1 to 10; Z represents a group —CH2—CH2—, —CH2—CH(CH3)—, —CH(CH3)CH2— or a combination thereof; s is number from 1 to 200; B represents hydrogen, —CO—CH═CH—COOM, COCH(SO3M)CH2COOM, —CO—CH2—CH(SO3M)-COOM, —SO3M, —SO2M and/or —PO3MM, whereby M is preferably a cation selected from the group Li+, Na+, K+, NH4+, HO—CH2—CH2—NH3+, (HO—CH2—CH2—)3NH+, and; Y is a radical of an amine of formula (4). The inventive addition compounds are used as dispersing agents of solids, for example, pigments, particularly in aqueous media.

Abstract: The invention relates to pigment preparations containing (a) at least one organic or inorganic pigment; (b) at least one cyclic imide of general formula (1) wherein R1 represents a linear-chain, branched or cyclic aliphatic radical having 10 to 30—preferably 12 to 25—carbon atoms, or an alkenyl radical having 10 to 30—preferably 12 to 25—carbon atoms, the aforementioned radicals being able to be substituted by at least one, e.g. 2, 3, 4 or 5, substituent from the group consisting of C1-C6-alkyl, C1-C6-alkoxy, C6-C10-aryl, hydroxy, carboxy, and sulfo, R2, R3, R4 and R5 are the same or different and represent hydrogen, C1-C10-alkyl, C1-C10-alkoxy, halogen, OR6, NR6R7, —COOR6, —CONR6R7, —NR6—COR7, SO2NR6R7, —SO3M, —NO2, —CN or CF3, R6 and R7 representing H or an alkyl radical having 1 to 10 C atoms and M representing an equivalent of a cation having a valency of 1 to 3; and (c) optionally further standard additives.