| 摘要 |
Pigment compositions, particularly for preparing printing dyes and lacquers, consist of an intimate mixture of a pigment, a non-ionic ethylene oxide-based dispersing agent, a natural or synthetic resin or cellulose derivative having a softening-point above 120 DEG C., and an antioxidant preferably in the proportions 30-65% pigment, 26-55% resin, 9-18% dispersing agent, and 0.1-2% antioxidant, by weight. The resin may be an oil-free alkyd, a maleate (maleic acid-polyol condensate, Examples 1, 3-6, 9, 10), a ketone-, or phenol-aldehyde resin, chlorinated rubber (Example 7), a cellulose ester or ether (cellulose acetobutyrate, Example 8) or the condensation product of an aromatic hydroxy sulphone, formaldehyde, an aromatic hydroxy carboxylic acid or an aryl-substituted hydroxy fatty acid or an ester thereof, and phenol, as disclosed in German Specification 1,124,959 (formaldehyde, 4,41-dihydroxydiphenylsulphone, salicylic acid + o-hydroxydiphenyl, Example 2). Suitable pigments are azo pigments, colour lakes, metal complex dyes, anthraquinones, quinacridones, titanium dioxide, compounds of iron, cadmium, chromium and zinc, and carbon black. Preferred dispersing agents contain 3-50 mols ethylene oxide and an alkanol, alkyl phenol, or carboxylic acid, in particular nonyl phenol. The anti-oxidant may be 2 - 21 - methylene - bis(4 - methyl - 6 - tertiary-butyl-phenol). In Example 1, 35-60 parts of the pigment preparation (based on a maleate resin) is then dispersed in 136 parts spirits, 10 parts ethylene glycol, 14 parts nitrocellulose and 5 parts ketone resin to form a printing dye and in Example 8, 35 parts of the pigment preparation (based on cellulose acetobutyrate) is then dispersed in 134 pts. ethyl acetate, 25 pts. methylene glycol acetate and 6 pts. cellulose acetobutyrate) also to form a printing dye.ALSO:Pigment compositions, particularly for preparing printing dyes and lacquers, consist of an intimate mixture of a pigment, a non-ionic ethylene oxide-based dispersing agent, a natural or synthetic resin or cellulose derivative having a softening-point above 120 DEG C., and an antioxidant, preferably in the proportions 30-65% pigment, 26-55% resin, 9-18% dispersing agent and 0.1-2% antioxidant, by weight. The resin may be colophony or a hydrogenated colophonium resin, or one of a number of synthetic resins (see Division C3). Suitable pigments are azo pigments, colour lakes, metal complex dyes, anthraquinones, quinacridones, titanium dioxide, compounds of iron, cadmium, chromium and zinc and carbon black. Preferred dispersing agents contain 3-50 mols ethylene oxide, and an alkanol, alkyl-phenol or a carboxylic acid, in particular nonyl phenol. The anti-oxidant may be 2,21-methylene-bis(4-methyl-6-tertiary-butyl-phenol). The compostions are prepared by kneading the constituents together at 70-150 DEG C. and cooling and grinding the resulting granulate. The products may be dispersed by simple stirring in mono- or polyhydric alcohols, esters, ketones or benzene hydrocarbons to form printing dyes or lacquers. |
