Patent GB-860628-A (GB)
Title: Improvements in or relating to a process for the dyeing of synthetic polyamides in the mass
IPC: C09B47/20
Filed: 1958-09-18
Abstract: Synthetic polyamides are dyed in the mass by incorporating in the molten polyamide a pigment obtained by the condensation of a metal phthalocyanine containing 4 to 8 chlorine atoms with a mercaptan in the presence of an alkali metal hydroxide and an alcohol.  Specified metal phthalocyanines are those of copper, cobalt, nickel and iron. Specified mercaptans are mercaptobenzene, 2-, 3- and 4-methyl-1-mercaptobenzenes, the mercaptonaphthalenes and octyl, dodecyl and benzyl mercaptans.  In the examples, molten polyamides are mixed with the reaction products made by condensing in the presence of benzyl alcohol and potassium hydroxide: (1) octachlorocopperphthalocyanine and 4 - methyl - 1 - mercaptobenzene, (2) tetrachlorocopperphthalocyanine and mercaptobenzene, (3) tetrachloronickelphthalocyanine and 4 - methyl - 1 - mercaptobenzene, (4) tetrachlorocopperphthalocyanine and 2 - mercaptonaphthalene, (5) octachlorocopperphthalocyanine and 4 - methyl - 1 - mercaptobenzene, (6) symmetrical tetrachlorocopperphthalocyanine and benzyl mercaptan, (7) symmetrical tetrachlorocopperphthalocyanine and octyl mercaptan, (8) hexachlorocopperphthalocyanine and 3 - methyl - 1 - mercaptobenzene, (9) hexachlorocopperphthalocyanine and 4 - methyl - 1-mercaptobenzene, (10) octachlorocopper - phthalocyanine and 4 - methyl - 1 - mercaptobenzene, (11) pentachlorocopperphthalocyanine and octyl mercaptan, (12) symmetrical tetrachlorocopperphthalocyanine and 1-mercaptonaphthalene, (13) heptachlorocopperphthalocyanine and mercaptobenzene, (14) pentachlorocopperphthalocyanine and dodecyl mercaptan, (15) hexachlorocopperphthalocyanine and benzyl mercaptan, (16) octachlorocopperphthalocyanine and mercaptobenzene and (17) octachlorocopperphthalocyanine and 2 - methyl - 1 - mercaptobenzene. The liquid compositions of the examples are spun to form filaments of yellow-green to blue-green colour.  Swiss Specifications 258,299, 269,707, 269,708, 269,709 and 269,710 are referred to.ALSO:Pigments are made by the condensation reaction of a metal phthalocyanine containing four to eight chlorine atoms with a mercaptan in the presence of an alkali metal hydroxide and an alcohol.  Specified metal phthalocyanines are those of copper, cobalt, nickel and iron. Specified mercaptans are mercaptobenzene, the 2-, 3- and 4-methyl-1-mercaptobenzene, the mercaptonaphthalenes and octyl, dodecyl and benzyl mercaptan.  In the Examples, pigments are made by condensing in the presence of potassium hydroxide and benzyl alcohol :-(1) octachlorocopper phthalocyanine and 4-methyl-1-mercaptobenzene (2) tetrachloro-copper phthalocyanine and mercaptobenzene, (3) tetrachloronickelphthalocyanine and 4-methyl-1-mercaptobenzene, (4) tetrachlorocopperphthalocyanine and 2-mercaptonaphthalene, (5) octachlorocopperphthaloajanine and 4-methyl-1-mercaptobenzene, (6) symmetrical tetrachlorocopperphthalocyanine and benzyl mercaptan, (7) symmetrical tetrachlorocopperphthalocyanine and octyl mercaptan, (8) hexachlorocopperphthalocyanine and 3-methyl-1-mercaptobenzene, (9) hexachlorocopperphthalocyanine and 4-methyl-1-mercaptobenzene, (10) octachlorocopperphthalocyanine and 4-methyl-1-mercaptobenzene, (11) pentachlorocopperphthalocyanine and octyl mercaptan, (12) symmetrical tetrachlorocopperphthalocyanine and 1-mercaptonaphthalene, (13) heptachlorocopperphthalocyanine and mercaptobenzene, (14) pentachlorocopperphthalocyanine and dodecyl mercaptan, (15) hexachlorocopperphthalocyanine and benzyl-mercaptan, (16) octachlorocopper phthalocyanine and mercaptobenzene and (17) octachlorocopperphthalocyanine and 2-methyl-1-mercaptobenzene.  Swiss Specifications 258,299, 269,707, 269,708, 269,709 and 269,710 are referred to.