Patent GB-233813-A (GB)
Title: Dyeing of acetyl cellulose
IPC: C09B21/00
Filed: 1924-02-27
Abstract: Cellulose acetate goods are dyed from a hydrosulphite vat without hydrolysis by means of quinonearylides of the benzene or naphthalene series or thiazines, azines, or oxazines derived therefrom.  A table is given of the shades produced with the following dyestuffs:- 2 : 5-di-p-chloranilinobenzoquinone, 3 : 6-dianilino-2 : 5- dichlorbenzoquinone, 3 : 6-di-p-oxyphenylamino-2 : 5-dichlorbenzoquinone, 2-anilino-1 : 4-naphthoone, 2-diphenylamino-1- : 4-naphthoquinone, the quinonimides from b -naphthoquinone-4-sulphonic acid and p-toluidine, p-aminodimethylaniline, p-phenylenediamine, or 1 : 4-aminonaphthol, the condensation products from naphthazarin and one molecule of p-phenylenediamine or p-aminophenol the thiazine obtained by heating 3 : 6-dianilino-2 : 5-dichlorbenzoquinone with sodium sulphide, the thiazines obtained by treating with sulphur dichloride the condensation product from b -naphthoquinone-4-sulphonic acid and p-toluidine or p-anisidine, or by boiling with alcoholic sodium polysulphide the condensation product from b -naphthoquinone-4-sulphonic acid and p-aminodimethylaniline, the azines obtained by heating under pressure with alcoholic ammonium sulphide the condensation products from benzoquinone and o-nitraniline, a -naphthoquinone and m-nitro-p-toluidine, or b -naphthoquinone-4-sulphonic acid and o-nitraniline, the oxazine from nitroso-m-dimethylaminophenol and naphthohydroquinone or 1-amino-2-naphthol or 2-amino-1-naphthol, and the oxazine from nitroso-m-dimethylaminophenol and hydroquinone.  Specifications 8093/93, 19599/12, 147,704, 151,000; 182,830, [Class 15 (ii), Dyeing, Processes &c. for], 204,108, 219,349; and 220,505, [Class 15 (ii), Dyeing, Processes &c. for], are referred to.ALSO:Cellulose acetate goods are dyed from a hydrosulphite vat without hydrolysis by means of quinonearylides of the benzene or naphthalene series or triazines, azines, or oxazines derived therefrom.  A table is given of the shades produced with the following dyestuffs: - 2 : 5-di-p-chloranilinobenzoquinone, 3 : 6-dianilino-2 : 5-dichlorbenzoquinone, 3 : 6-di-p-oxyphenylamino-2 : 5-dichlorbenzoquinone, 2-anilino-1 : 4-naphthoquinone, 2-diphenylamino-1 : 4-naphthoquinone, the quinonimides from b -naphthoquinone-4-sulphonic acid and p-toluidine, p-aminodimethylaniline, p-phenylenediamine, or 1 : 4-aminonaphthol, the condensation products from naphthazarin and one molecule of p-phenylenediamine or p-aminophenol, the thiazine obtained by treating 3 . 6-dianilino-2 : 5-dichlorbenzoquinone with sodium sulphide, the thiazines obtained by treating with sulphur dichloride the condensation product from b -naphthoquinone-4-sulphonic acid and p-toluidine or p-anisidine, or by boiling with alcoholic sodium polysulphide the condensation product from b -naphthoquinone-4-sulphonic acid and p-aminodimethylaniline, the azines obtained by heating under pressure with alcoholic ammonium sulphide the condensation products from benzoquinone and o-nitraniline, a -naphthoquinone, and m-nitro-p-toluidine, or b -naphthoquinone-4-sulphonic acid and o-nitraniline, the oxazine from nitroso-m-dimethylaminophenol and naphthohydroquinone or 1-amino-2-naphthol or 2-amino-1-naphthol, and the oxazine from nitrosom-dimethylaminophenol and hydroquinone.  Specifications 8093/93, [Class 2, Acids and salts, Organic &c.], 19599/12, 147,704, and 151,000, [Class 2 (iii), Dyes &c.], 182,830, 204,108, [Class 2 (iii), Dyes &c.], 219,349, and 220,505 are referred to.