Patent GB-442373-A (GB)
Title: Process of dyeing pelts, hairs or feathers
IPC: D06P3/30
Filed: 1934-08-01
Abstract: Aniline-black and like dyeing.--Pelts, hairs, and feathers are dyed by the processes of the parent Specifications with the use in the dyebath of an emulsifying or wetting agent and the prior inventions may be further modified for dyeing pelts by substituting the salts used therein wholly or in part by a salt formed by a di- or poly-oxy compound of the benzene series with an aromatic or heterocyclic amine.  Such salts are obtained by dissolving equimolecular proportions of the components in an organic solvent, such as methanol, acetone or benzene, and evaporating the solvent.  Specified emulsifying or wetting agents are turkey red oils, sulphonated aliphatic hydrocarbons from brown coal tar, e.g. sulphonated solar oil, water-soluble condensation products of unsaturated fatty acids with sulphonic acids of aromatic oxy-compounds (cf. Specification 346,425), sulphonated alkylnaphthalenes and fatty alcohol sulphonates.  The following examples are specified: (1) A chromium-mordanted white lambskin is dyed a black-green on the hair side by treatment for 3 hours in an aqueous bath at 30 DEG  C. containing hydrogen peroxide, the salt from 1 : 5-dioxynaphthalene and 4-amino-4<1>-dimethylaminodiphenylamine, and the condensation product from naphthalenesulphonic acid and benzyl chloride (cf. Specification 240,318, [Class 2 (iii)]).  (2) An iron-mordanted white rabbit skin is dyed a full moleskin grey by treatment for 3 hours in an aqueous bath at 28 DEG  C. containing hydrogen peroxide, the salt from 2 : 7 - dioxynaphthalene and 4 - aminodimethylaminobenzene, and turkey red oil.  (3) An alum-mordanted white lambskin is dyed a blue-grey by treatment for 3 hours in an aqueous bath at 28 DEG  C. containing hydrogen peroxide, the salt from 1 : 5-dioxynaphthalene and 4-aminodimethylaminobenzene, and isopropylnaphthalenesulphonic acid.  (4) A chromium-mordanted white rabbit skin is dyed a deep green on the hair side by treatment for 4 hours in an aqueous bath at 32 DEG  C. containing hydrogen peroxide, the salt from 2 : 6-dioxynaphthalene and 4-aminodimethylaminobenzene and the product obtained by treating castor oil with 1-naphthol-5-sulphonic acid in presence of sulphuric acid (cf. Specification 346,425).  (5) A chromium-mordanted white lambskin is dyed a bluish brown by treatment for 3 hours in an aqueous bath at 30 DEG  C. containing hydrogen peroxide, the salt from 2 : 7-dioxynaphthalene and 2 : 4-diaminotoluene, and turkey red oil. (6) A chromium-mordanted white lambskin is dyed a full blue-black with a blue flesh side by treatment for 5 hours in an aqueous bath at 32 DEG  C. containing hydrogen peroxide, the salt from 1 : 5-dioxynaphthalene and 4-aminodiphenylamine, the salt from 2 : 6-dioxynaphthalene and 4-aminodimethylaminobenzene, and a wetting agent obtained by sulphonating solar oil and xylene (cf. Specification 271,474, [Class 2 (iii)]).  (7) A chromium-mordanted white rabbit skin is dyed a moleskin grey by treatment for 3 hours in an aqueous bath at 30 DEG C. containing hydrogen peroxide-the salt from 1 : 2-dioxybenzene and 1 : 4, diaminobenzene, and turkey red oil.  (8) A chromium-mordanted rabbit skin is dyed a greenish deep grey by treatment for 3 hours in an aqueous bath at 30 DEG  C. containing hydrogen peroxide, the salt from 1 : 3-dioxybenzene and 4 - aminodiphenylamine, and isopropylnaphthalenesulphonic acid.  (9) A copper-mordanted rabbit skin is dyed brown by treatment for 3 hours in an aqueous bath at 30 DEG  C. containing hydrogen peroxide, the salt from 1 : 4-dioxybenzene and 2-chloro-1 : 4-diaminobenzene and the condensation product from naphthalenesulphonic acid and benzyl chloride.  (10) A chromium-mordanted white rabbit skin is dyed a full black with a blue flesh side by treatment for 3 hours in an aqueous bath at 30 DEG  C. containing hydrogen peroxide, the salt from 1 : 5-dioxynaphthalene and 4-aminodiphenylamine, the salt from 1 : 3-dioxybenzene and 2-chloro-1 : 4-diaminobenzene, and the condensation product from naphthalenesulphonic acid and benzyl chloride.  (11) A chromium-mordanted white lambskin is dyed a dull red-brown by treatment for 3 hours in an aqueous bath at room temperature containing hydrogen peroxide, the salt from 1 : 5-dioxynaphthalene and 1-amino-5-oxynaphthalene, and turkey red oil.  (12) A chromium-mordanted white rabbit skin is dyed a bluish dark brown by treatment for 3 hours at room temperature in an aqueous solution containing hydrogen peroxide, the salt from 1 : 6-dioxynaphthalene and 1-amino-5-oxynaphthalene, and turkey red oil.  (13) An iron-mordanted white rabbit skin is dyed a marine blue by treatment for 3 hours in an aqueous bath at 30 DEG  C. containing hydrogen peroxide, the salt from 1-amino-5- oxynaphthalene and 4-aminodiphenylamine, and the wetting agent used in (6).  (14) A chromium-mordanted lambskin is dyed a full greenish black with a blue flesh side by treatment for 3 hours in an aqueous bath at about 30 DEG  C. containing hydrogen peroxide, the salt from 1 : 5-dioxynaphthalene and 4-aminodiphenylamine, the salt from 1 : 5-dioxynaphthalene and 2 : 4-diaminotoluene, the salt from 1 : 6-dioxynaphthalene and 1 - nitro - 2 - amino - 4 - dimethylaminobenzene, and sulphonated solar oil.  (15) A chromium-mordanted lambskin is dyed a full blue-black with a light blue flesh side by treatment in an aqueous solution containing hydrogen peroxide, the salt from 1 : 5-dioxynaphthalene and 4-aminodiphenyl amine, the salt from 2 : 6-dioxynaphthalene and 4-aminodimethylaminobenzene, the salt from 1 : 5-dioxynaphthalene and 1 : 3-diaminobenzene, and turkey red oil. 1-Nitro-2-amino-4-dimethylaminobenzene is obtained by reaction of 1 - nitro - 2 - amino - 4 - chlorobenzene with dimethylamine.