摘要:
According to the invention, addition of one or more surfactants having a cloud point in aqueous solution to an aqueous suspension of an azo disperse dye gives after the isolation of the dye at a temperature above the cloud point aqueous press cakes containing a large amount of this dye.The direct processing of press cakes as obtained for example after the synthesis and isolation of azo disperse dyes to practical dispersions for use requires a minimum dye content in the press cakes. The minimum content is frequently not obtained when conventional methods of isolation are used, so that it is necessary to proceed via the indirect route of drying to obtain powders and redispersing the powders. By using the process according to the invention it is possible to cut out the costly indirect route or, if desired, to reduce the expense of drying to obtain powders by an appreciable margin.
摘要:
According to the invention, addition of one or more surfactants having a cloud point in aqueous solution to an aqueous suspension of a solid gives after the isolation of the solid at a temperature above the cloud point aqueous press cakes containing a large amount of this solid. The direct processing of press cakes as obtained for example after the synthesis and isolation of dyes or pigments to give practical aqueous pastes or dispersions requires a minimum solids content in the press cakes. The minimum content is frequently not obtained when conventional methods of isolation are used, so that it is necessary to proceed via the indirect route of drying to obtain the powders and redispersing the powders. By using the process according to the invention it is possible to cut out the costly indirect route or, if desired, to reduce the expense of drying to obtain powders by an appreciable margin.
摘要:
Compounds of the formula ##STR1## in which Y denotes an aryloxy group, which is possibly substituted, R.sub.4 and R.sub.5 denote hydrogen or C.sub.1 -C.sub.4 -alkyl, m denotes 0 to 12 and Z denotes polyalkylene glycol radicals having about 8 to about 200 ethylene glycol units --(CH.sub.2 --CH.sub.2 O)-- or up to about 200 ethylene glycol units and alkylene glycol units of the formula ##STR2## in which R.sub.6 is methyl or ethyl and in which at least 8 ethylene glycol units are present. These compounds are prepared by initially reacting epoxide with a phenol or naphthol and subsequently oxalkylating. The reaction products are used as dispersants for the preparation of aqueous pigment dispersions.
摘要:
The invention relates to novolak oxyalkylate mixed esters which, on the one hand, contain benzoyl and/or naphthoyl radicals and, on the other hand, contain maleic acid and/or sulfosuccinic acid half-ester groups. They are obtained by reacting novolak oxyalkylates with benzoic acid and/or naphthoic acid or with its anhydride or chloride on the one hand and maleic anhydride on the other hand and, if appropriate, reacting the maleic acid half-ester groups with sulfites to give sulfosuccinic acid half-ester groups. These compounds are highly suitable for use as dispersing agents for the preparation of low-foam dispersions of pigments, dyestuffs and other agents and as emulsifying, leveling and dyeing auxiliaries.
摘要:
Polyether polyamines of the formula 1 ##STR1## in which R.sub.1 and R.sub.2 are identical or different and denote C.sub.8 -C.sub.30 -alkyl, -2-hydroxyalkyl or -alkenyl or C.sub.8 -C.sub.24 -alkoxypropyl, m and n are 2 or 3, R.sub.3 is hydrogen or methyl and the sum of o+p+q+r is an integer from 4 to 600, process for their manufacture and their use as dispersing agents, corrosion inhibitors, demulsifiers and acid retarders.
摘要:
A compound of the formulaA[(Y-O).sub.x - Y - Z].sub.min which A is the radical of an arylated fatty alcohol, Y are identical or different groups of the formulae--CH.sub.2 --CH.sub.2 -- or --CH.sub.2 --CH(CH.sub.3)--,Z are identical or different radicals of the formulae --OH, --O--CO--CH.dbd.CH--COOM and --O--CO--CH.sub.2 --CH(SO.sub.3 M)--COOM,in whichM is a cation,x is an integer from 1 to 150, andm is a number from 1 to 7.
摘要:
By coupling diazotized amines of the benzene series onto acetoacetic acid arylides, in which process more than one diazo and/or coupling component is applied and from 0.1 to 20 molar % of the diazo and/or coupling component contain acid groups, and by subsequently reacting the reactive acid groups of the product obtained by coupling with cation-active quaternary compounds, recrystallization-resistant monoazo pigment mixtures are obtained which are suitable for the preparation of varnishes, printing inks, and oily and aqueous compositions.
摘要:
Dispersions of pigments, disperse- or vat-dyestuffs, wherein the dispersing agent is formed either by cocondensation of a phenolic component, formaldehyde and an alkali metal sulfite or of a sulfonated phenolic component and formaldehyde. These dispersions are characterized in that the dispersing agent used shows an improved dispersing effect. Furthermore, they can also be used when being neutralized for the dispersing alkali sensitive dyestuffs and they show no tendency to soil the fabrics so that also clean shades may be dyed.
摘要:
Water-insoluble azo colorants, their preparation and use The invention relates to monoazo and disazo compounds of the formula (I) ##STR1## in which D is the radical of a carbocyclic or heterocyclic diazo or bisdiazo component, R.sup.1 and R.sup.2, independently of one another, are each a substituted or unsubstituted aryl or heteroaryl radical, X.sup.1 and X.sup.2, independently of one another, are each ring-forming ether oxygen or a substituted or unsubstituted imide grouping and n has the value 0 or 1, in which rings A and B, independently of one another, can each be additionally substituted and/or carry substituted or unsubstituted fused rings.These new compounds of the formula (I) are obtained by coupling diazotized amines or diamines of the type D--NH.sub.2 or H.sub.2 N--D--NH.sub.2 with (benzoxazol-2-yl)- or (benzimidazol-2-yl)-arylacetamides.Depending on the presence and length of alkyl chains, the compounds of the formula (I) are suitable for use as pigments, disperse dyes or oil-soluble dyes.
摘要:
Compounds of the formulaA[(Y--O).sub.x --Y--Z].sub.min which A is the radical of an oxaryl-modified (modified with an aryl group containing a hydroxyl group) fatty alcohol, i.e., the radical of an arylated fatty alcohol, or is the radical of an oxaryl-modified (again, modified with an aryl group containing a hydroxyl group) fatty acid or esterification product thereof, i.e., the radical of an arylated fatty acid or esterification product thereof, Y denotes identical or different groups of the formula--CH.sub.2 --CH.sub.2 -- or --CH.sub.2 --CH(CH.sub.3)--,Z denotes identical or different radicals of the formulae --OH, --O--CO--CH.dbd.CH--COOM and --O--CO--CH.sub.2 --CH(SO.sub.3 M)--COOM, in whichM is a cation,x is an integer of from 1 to 150 andm is a number of from 1 to 7,are suitable as interfacially active agents, in particular as dispersing agents, wetting agents, emulsifiers and dyeing auxiliaries.