Abstract:
A highly covering disazo pigment having the chemical constitution ##SPC1##Which is characterized by a specific surface of 12 - 30, preferably 15 to 25, m.sup.2 /g, a maximum of the grain size distribution of between 250 and 500 nm and a proportion of these grain sizes in the total distribution of 35 - 65 percent, preferably 45 - 60 percent. This new pigment form is obtained by heating the pigment obtained after coupling with a solvent which is immiscible with water or miscible with water to a limited degree only to temperatures above 100.degree.C.
Abstract:
The disazo pigment of the formula ##SPC1##Characterized by a specific surface of 12 - 20, preferably 13 - 18 m.sup.2 /g, a maximum of the distribution of the grain sizes of between 500 and 1000 nm and a proportion of these grain sizes in the total distribution of between 35 and 65 %. This disazo pigment is obtained by isolating the pigment, after coupling, by stirring it out with alkali and, after having filtered it and washed it to neutrality, heating it to temperatures above 100.degree. C in a mixture of water and a solvent which is immiscible with water or miscible with water to a limited degree only.
Abstract:
Process for the aftertreatment of the azo pigment of the formula ##STR1## C.I. PIGMENT ORANGE 36 wherein the crude pigment obtained after coupling is heated to temperatures from 100.degree. to 150.degree. C. in dry or wet condition in a solvent which is water-immiscible or not indefinitely water-miscible and the pigment is isolated in known manner. The pigment aftertreated in this way shows substantially improved hiding power while the same pigment prepared in the usual way has poor hiding power and can not be used in stoving lacquers.
Abstract:
A process for the purification of azo pigments, wherein the crude pigment is stirred for some time in an aqueous alkaline suspension in a pH range from 9 to 12, preferably from 11 to 12, at temperatures between 20.degree. to 80.degree. C and subsequently the crude pigment is filtered off and washed neutral. The pigments treated by this process show a clearer and more brilliant shade and are faster to bleeding when incorporated, for example, into a thermoplastic material than the untreated pigments.
Abstract:
Monoazo dyestuffs of the formula ##SPC1##Wherein R.sub.1, R.sub.2 and R.sub.3 are identical or different and are hydrogen, alkyl or alkoxy, preferably having 1 to 2 carbon atoms, or halogen, especially chlorine, X is hydrogen or halogen, preferably chlorine and A is acetoacetyl or and a process for preparing them by coupling diazotized amines of the general formula ##SPC2##With coupling components of the formula ##SPC3##Where R.sub.1, R.sub.2, R.sub.3, X and A have the above meaning. These new pigments may be used for dyeing and printing of material or synthetic materials. They have good fastness properties, especially an improved fastness to heat.
Abstract:
A form of the disazo pigment C.I. 20040 having the formula 30% of ##STR1## IS SHOWN HAVING IMPROVED COVERING POWER, IMPROVED FLUIDITY IN LACQUER SYSTEMS AND HIGH LUSTER, WHICH IS CHARACTERIZED BY A SPECIFIC SURFACE OF 10 - 20, PREFERABLY 12 - 17 M.sup.2 /G AND A MAXIMUM IN GRAIN DIAMETER DISTRIBUTION BETWEEN 500 AND 1000 NM, AT LEAST 30 % OF ALL GRAINS HAVING A DIAMETER OF FROM 500 TO 1000 NM AND LESS THAN 25% OF ALL GRAINS HAVING A DIAMETER OR MORE THAN 1000 NM. This new pigment is obtained by isolating the pigment, after coupling, by stirring it out with alkali and, after having filtered it off and washed until neutrality, heating it to temperatures above 100.degree. C with an organic solvent which is immiscible with water or miscible with water to a limited degree only.
Abstract translation:一种形式的双偶氮颜料C.I. 具有“IMAGE”+ TR 的30%的公式的20040具有改进的覆盖功率,改进的LACQUER系统和高LUSTER中的流体特性,其特征在于10-20,优选12-17Mb / G 并且在500和1000NM之间的最大粒度分布中,至少30%的所有颗粒具有500至1000N的直径,并且具有直径大于或等于1000Nm的所有颗粒的25%。 这种新颜料是通过在偶联后通过将其与碱反应来分离颜料得到的,并且在将其过滤并洗涤至中性之后,用与水混溶的有机溶剂加热至高于100℃, 水仅在有限的程度。
Abstract:
A pigment of the formula ##STR1## wherein R.sub.1 is hydrogen, chlorine or methyl and R.sub.2 is hydrogen or methyl. These pigments have a high color strength, fastness to overvarnishing, fastness to migration and fastness to light and weathering. They can be used in all fields in which pigments are used as coloring material, especially for the coloring of lacquers with metal-effect.
Abstract:
Process for preparing fiber-reactive water-soluble phthalocyanine azo dyes, using the following conversion stages ##STR1## followed by the diazonium coupling of the fiber-reactive group to the pyrazole ring. The novel intermediates are desirable products.
Abstract translation:使用以下转化阶段[染料核] SO 2卤素制备纤维反应性水溶性酞菁偶氮染料的方法,然后将纤维反应性基团与吡唑环的重氮偶联 。 新型中间体是所需产品。
Abstract:
A process for the manufacture of esters of aromatic sulphonic acids and aromatic aminohydroxy compounds, of the formula Ih.sub.2 n--a--o--so.sub.2 --b (i)comprising reacting an aromatic aminohydroxy compound of the formula IIh.sub.2 n--a--oh (ii)having a pK.sub.a value of from 8.5 to 10.1, with a sulphochloride of the formula IIIcl--SO.sub.2 --B (III)whereinA is phenylene, substituted phenylene, naphthylene or substituted naphthylene,B is phenyl, substituted phenyl, naphthyl or substituted naphthyl, and both A and B are free from --COOH and --SO.sub.3 H substituents;The reaction taking place in a reaction medium consisting essentially of water and a water-immiscible organic solvent for the sulphochloride,At a temperature of from 0.degree. to 95.degree. C., at a pH which is determined from and associated with the pK.sub.a value of said aromatic aminohydroxy compound of formula II by the equationpK.sub.a -pH=0.5 to -1.5, and in the presence of a phase transfer catalyst.
Abstract:
Trisazo dyes of high tinctorial strength and excellent fastness have the structure ##STR1## where one of M and M.sup.1 is ##STR2## as more fully set out below.