| 摘要 |
In the dyeing or printing of linear aromatic polyester fibres or films with disperse dyestuffs, the materials are treated, before or during the dyeing or printing operation, with diphenylsulphone or a substitution product thereof, such as 4-chlordiphenylsulphone, 4,41-dichlordiphenylsulphone, 4,41-dibromdiphenylsulphone or 4 - hydroxy - 41 - brom - diphenylsulphone. The diphenylsulphone may be added to the dyebath or pretreatment bath in finely-divided form or as a solution in, for example, dimethylformamide or acetone. Examples of dyeing and printing are given. A dyestuff preparation contains, in addition to the disperse dyestuff and diphenylsulphone or a derivative thereof, dispersing agents such as a naphthalene sulphonic acid-formaldehyde condensation product, ethoxylation products of alcohols, the sodium salt of isopropylnaphthalene sulphonic acid in admixture with glue, and dyeing adjuvants such as sodium sulphate, chloride or acetate, an alkali metal phosphate, benzyl alcohol, the sodium salt of mono- or di-benzylsulphanilic acid, the sodium salt of naphthalene sulphonic acid and sulphanilic acid.ALSO:In the dyeing of aromatic polyester powders with disperse dyestuffs, the powders are treated before or during the dyeing operation with diphenylsulphone or a substitution product thereof such as 4-chloro-, 4,41-dichloro-, 4,41 - dibromo - or 4 - hydroxy - 41 - bromodiphenyl-sulphone.
|
