Das Faerben von Kunststoffmassen mit Pigmentfarbstoffen

摘要

Paints, nitrocellulose lacquers, moulding powders, pastes and liquids for the moulding of plastics, and synthetic linear aromatic polyesters which are to be formed into fibres are pigmented by the incorporation in the material to be pigmented of perylene derivatives of the formula wherein x represents hydrogen, chlorine, nitro, methyl, phenyl-amino, phenylazo, or together with y represents the chain -CH2-CH2-CH2-CH2-, y represents hydrogen or methyl when x denotes methyl, represents hydrogen, or, together with z, the chain -CH2-CH2-CH2-CH2- when x denotes hydrogen, represents hydrogen when x denotes chlorine, nitro, phenylamino or phenylazo, or, together with x, represents the chain -CH2-CH2-CH2-CH2-, z represents hydrogen or together with y the chain -CH2-CH2-CH2-CH2-when x denotes hydrogen, or represents hydrogen when x has another meaning. The phenyl nucleus may be phenyl, 4-methyl, 4-chlorophenyl, 2.3-tetramethylene phenyl, 3.4-tetramethylenephenyl, 4-nitrophenyl, 4-phenylaminophenyl, 4-phenylazophenyl, or 3.4-dimenthylphenyl. The dyestuffs are preferably brought into a finely divided form before use, e.g. by precipitation from solution in sulphuric acid of 90-100% concentration by the addition of water, or by grinding in the presence of grinding assistants such as sodium or calcium chloride or calcium carbonate urea phthalic acid or similar materials, followed by mixing the mass with water containing hydrochloric acid or sodium hydroxide to dissolve the grinding assistant, the residual finely ground dyestuff being then filtered off and washed. In an example, a mixture of 30 parts of a perylene derivative in which the phenyl nucleus is 4-methylphenyl and 5,000 parts of polyethylene terephthalate are melt spun in nitrogen at 285 DEG C. to form red filaments. In a second example, 0,1 part of a perylene derivative in which the phenyl nucleus is unsubstituted, mixed with 60 parts of polyvinyl chloride, and 41 parts of dioctyl phthalate is milled at 140 DEG -150 DEG C. and pressed at about 140 DEG C. to form a red sheet. In a third example, to a mixture of 0,05 part of a perylene derivative in which the phenyl nucleus is 4-chlorophenyl and 100 parts of a polystyrene moulding powder is roller milled at 120 DEG -150 DEG C. and comminuted to a 2-4 mm. particle size for injection moulding. In a fourth example, a polyethylene moulding powder is similarly pigmented with a perylene derivative in which the phenyl nucleus is 3,4-dimethylphenyl.