Patent GB-822573-A (GB)
Title: A method for the manufacture of black colouring matter
IPC: C07C39/235
Filed: 1956-10-09
Abstract: A black colouring matter is prepared by heating a ferrous compound with urushiol to produce iron urushiolate and dissolving the product in a solvent.  The term urushiol includes the chief constituents of lacquers from China, Japan, Korea, Burma, Indo-China and Java which are of slightly different chemical composition.  The iron may be present in the stoichiometric proportion, or in lesser amount, in which case the addition product of hexamethylene tetramine and a monohydric phenol is condensed with the product.  Examples are given of producing both types.  The colouring matter may be dissolved in solvent naphtha and ethylene glycol monomethyl ether to form a printing ink; it may be added to a varnish consisting of polymerized drying oils and thinners; it may be added to paints consisting of modified or unmodified alkyd resins and suitable vehicles; it may be added to tri-methyl silanol and solvent naphtha to form a silicoresin paint; it may be added to a paint consisting of an epoxy resin, a melamine-formaldehyde resin and solvent naphtha; these paint compositions are hardened by baking after application; it may be incorporated into moulding powders containing phenol-, urea- or melamine-formaldehyde resin or polyvinyl chloride; and it may be included in the mixture of rubber, sulphur and magnesia used in the production of ebonite.  It may also be mixed with a melamine resin or with maleic-acid modified linseed oil to form a printing paste for textiles; the printed material must be heated to harden the print.ALSO:A black colouring matter comprises a solution of iron urushiolate, prepared by heating a ferrous compound with urushiol. The term urushiol includes the chief constituents of lacquers from China, Japan, Korea, Burma, Indo-China and Java which are of slightly different chemical composition.  The iron may be present in the stoichiometric proportion, or in lesser amount in which case the addition product of hexamethylene tetramine and a monohydric phenol is condensed with the product.  Examples are given of producing both types.  The ferrous compound may be ferrous hydroxide or ferrous acetate (pyrolignite of iron).ALSO:A black colouring matter comprises a solution of iron urushiolate, prepared by heating a ferrous compound with urushiol. The term urushiol includes the chief constituents of lacquers from China, Japan, Korea, Burma, Indo-China and Java which are of slightly different chemical composition.  The iron may be present in the stoichiometric proportion, or in lesser amount, in which case the addition product of hexamethylene tetramine and a monohydric phenol is condensed with the product.  Examples are given of producing both types.  The colouring matter may be added to paints consisting of modified or unmodified alkyd resins and suitable vehicles; it may be added to trimethyl silanol and solvent naphtha to form a silicoresin paint; it may be added to a paint consisting of an epoxy resin, a melamine-formaldehyde resin and solvent naphtha; these paint compositions are hardened by baking after application; it may be incorporated into moulding powders containing phenol-, urea-, or melamine-formaldehyde resin or polyvinyl chloride; and it may be included in the mixture of rubber, sulphur and magnesia used in the production of ebonite. It may also be mixed with a melamine resin or with maleic-acid modified linseed oil to form a printing paste for textiles; the printed material must be heated to harden the print.