Patent GB-699194-A (GB)
Title: Dyeing of nylon and acetate silk with ice colors
IPC: D06P3/44
Filed: 1951-02-22
Abstract: Nylon and acetate rayon are dyed by impregnating them with an amine base and a Naphthol coupling component in the presence of from 1 to 5 per cent of the weight of the fibres of a guanidine compound of the formula <FORM:0699194/IV (c)/1> wherein R1 and R2 are hydrogen, alkyl, aryl, aralkyl or cycloalkyl groups, and the amine base is then diazotized and coupled on the fibre.  Many suitable amines, coupling components and guanidine compounds are listed.  The coupling component and the guanidine compound may be employed together in the form of a salt.  When preparing the impregnating solutions a small amount of a water-soluble organic solvent and a wetting-agent may be added. The impregnating bath preferably also contains a small amount of strong base.  Many examples are given in which the following bases, naphthols and guanidine compounds are used: (1), (2), (9), (12), (13) and (17) 4-benzoylamido-2,5 - diethoxyaniline, b  - hydroxynaphthoic - p - chloroanilide and guanidine carbonate, hydrochloride, sulphate or nitrate or aminoguanidine bicarbonate; (3) 4 - benzoylamido - 2,5 - diethoxyaniline, b  - hydroxyanthroic - o - toluidide and guanidine carbonate; (4) 2-amino-4,41-dichlorodiphenyl oxide, b  - hydroxynaphthoic - 1 - naphthylamide and guanidine carbonate; (5) 2-amino-4,41-dichlorodiphenyloxide, 41 - benzoylacetamido - 21,51 - dimethoxybenzanilide and guanidine carbonate; (6) 4-amino-2,31-dimethylazobenzene, b -hydroxynaphthoic-2-naphthylamide and guanidine carbonate; (7) 4 - amino - 2,31 - dimethylazobenzene, 2 - hydroxy - 11 - benzo(a)carbazole - 3 - carboxylic-p-anisidide and guanidine carbonate; (8) and (16) 5-methyl-o-anisidine, b -hydroxynaphthoic-m-nitroanilide and aminoguanidine bicarbonate or guanidine acetate; (10) 5 - methyl - o - anisidine, 5 - chloro - 2,4 - dimethoxy acetoacetanilide and guanidine carbonate; (11) 2-amino-4,41-dichlorodiphenyloxide, phenyl methyl pyrazolone and guanidine carbonate; (14), (15) and (18) 4-benzoylamido-2,5-diethoxyaniline, b -hydroxynaphthoic anilide and b -diphenylbiguanide or guanidine; (19) 2-amino-4,41 - dichlorodiphenyloxide, b  - hydroxynaphthoic - 1 - naphthylamide and phenylbiguanide; (20) 2 - amino - 4,41 - dichlorodiphenyloxide, b  - hydroxynaphthoic - 2 - naphthylamide and phenylbiguanide hydrochloride; (21) 4-amino-41 - (dihydroxyethylamino) - azobenzene, b  - hydroxynaphthoic-p-chloroanilide and guanidine carbonate; (22) and (23) 2-amino-4,41-dichlorodiphenyloxide, b  - hydroxynaphthoic - 1 - naphthylamide and biguanide or biguanide hydrochloride; (24) the b -diphenyl-biguanide salt of b -hydroxynaphthoic-p-chloroanilide and 2 - amino - 4,41 - dichlorodiphenyloxide; (25) b  - hydroxyanthroic - o - toluidide, amino-guanidine bicarbonate and 4 - amino - 2,5 - diethoxybenzanilide; (26) 2-hydroxy-3-carbazole carboxylic - p - chloroanilide, guanidine hydrochloride and 2 - amino - 4,41 - dichlorodiphenyl oxide; (27) b  - hydroxynaphthoic - a  - naphthanilide, phenylbiguanide hydrochloride and 2 - amino - 4,41 - dichlorodiphenyloxide; (28) b -hydroxynaphthoic - 2 - naphthylamide, guanidine carbonate and 4-amino-2,5-diethoxybenzanilide; (29) 4-amino-2,5-diethoxybenzanilide, b -hydroxynaphthoic-p-chloroanilide and guanidine carbonate; (30) b -hydroxynaphthoic-1-naphthylamide, b - diphenylbiguanide and 2-amino - 4,41 - dichlorodiphenyloxide; (31) 4-amino - 2,31 - dimethylazobenzene, guanidine carbonate and b -hydroxynaphthoic-2-naphthylamide; (32) 4-amino-2,5-diethoxybenzanilide, b -hydroxynaphthoic-anilide and guanidine carbonate; (33) to (36) salts are used obtained from guanidine carbonate and b -hydroxynaphthoic anilide, b  - hydroxynaphthoic - p - chloroanilide, b  - hydroxynaphthoic - 2 - naphthylamide, or b  - hydroxyanthroic - o - toluidide; (37) a mechanical mixture of b -hydroxynaphthoic anilide and guanidine carbonate is used in dyeing; and (38) and (39) nylon is grounded with baths containing various amounts of b -hydroxy-naphthoic-m-nitroanilide and guanidine carbonate. Specification 447,611 is referred to.