Patent GB-762478-A (GB)
Title: Colouration process
Inventor: DOUGLAS GEORGE TRAPP
IPC: C08K5/00
Filed: 1953-07-31
Abstract: Linear aromatic polyesters, e.g. polyethylene terephthalate, are coloured by treating them with a tetra-aza-porphin of the formula <FORM:0762478/IV(a)/1> wherein Me is a metal of atomic number 24-29 inclusive, R1 and R2 are hydrogen atoms or alkyl radicals or together form an alicyclic ring and R3, R4, R5, R6, R7 and R8 are hydrogen atoms or alkyl radicals or any or all of the pairs R3 and R4, R5 and R6, and R7 and R8 may form a substituted or unsubstituted alicyclic, aromatic or quinonoid ring.  The colouring matter may be mixed with the polyester and the mixture then melt-spun into filaments, bristles, films or other shaped articles. Alternatively, filaments, fabrics, bristles and films of the polyester may be impregnated, either locally or uniformly, with a solution of the colouring matter in, for example, o-chloro-phenol, and subsequently heated in, for example, hot air.  Numerous examples describe the treatment of polyethylene terephthalate with nickel, cobalt and copper octamethyl- and tetracyclohexenotetra-aza-porphin, nickel tetramethyl-dibenz-, hexamethyl-, dicyclohexeno-dibenz- and tricyclohexeno - monobenz - tetra - aza - porphin and cobalt tetramethyl-dibenz-tetra-aza-porphin, the mixture then being melt-spun into filaments, employing, in one example, the apparatus of Specification 533,307.  The tetra-aza-porphins may be prepared by the process described in Specifications 686,395, 688,768, 689,387, 689,388 and 689,389, [all in Group IV (c)]. Specifications 651,694 and 730,468, [Group IV (c)], also are referred to.ALSO:Linear aromatic polyesters, e.g. polyethylene terephthalate, are coloured by treating them with a tetra-aza-porphin of the formula:- <FORM:0762478/IV(b)/1> wherein Me is a metal of atomic number 24-29 inclusive, R1 and R2 are hydrogen atoms or alkyl radicals or together form an alicyclic ring and R3, R4, R5, R6, R7 and R8 are hydrogen atoms or alkyl radicals or any or all of the pairs R3 and R4, R5 and R6, and R7 and R8 may form a substituted or unsubstituted alicyclic, aromatic or quinonoid ring.  The colouring matter may be mixed with the polyester and the mixture then melt-spun into filaments, bristles, films or other shaped articles. Alternatively filaments, fabrics, bristles and films of the polyester may be impregnated, either locally or uniformly, with a solution of the colouring matter in, for example, o-chlorophenol, and subsequently heated in, for example, hot air.  Numerous examples describe the treatment of polyethylene terephthalate with nickel, cobalt and copper octamethyl- and tetracyclohexenotetra-aza-porphin, nickel tetramethyldibenz-, hexamethyl-, dicyclohexeno-dibenz-and tricyclohexeno-monobenz-tetra-azaporphin and cobalt tetramethyl-dibenztetra-aza-porphin, the mixture then being melt-spun into filaments, employing, in one example, the apparatus of Specification 533,307 [Group IV].  The tetra-aza-porphins may be prepared by the process described in Specifications 686,395, 688,768, 689,387, 689,388 and 689,389.  Specifications 651,694 [Group IV(a)] and 730,468 also are referred to.