Back to results
US 7,846,215 B2Granted
Process for dyeing polyester
AssigneeHuntsman International LLC
InventorsMartin Weber, Edvard Ham
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for dyeing polyester fibre material according to the exhaust method, which process comprises the following steps: (a) pre-treatment of the fibre material with one or more surfactants, (b) dyeing with one or more disperse dyes, and (c) reductive after-treatment with a hydroxyalkylsulfinic acid or a hydroxyalkylsulfinic acid salt, wherein steps (a), (b) and (c) are carried out in succession in a single liquor.
Claims6
A process for dyeing polyester fibre material according to the exhaust method, which process comprises the following steps:
- (a) pre-treatment of the fibre material with triethylene glycol monobutyl ether or phosphoric acid ester (potassium salt) of ethoxylated tridecyl alcohol or a mixture thereof,
- (b) dyeing with one or more disperse dyes, and
- (c) reductive after-treatment with a hydroxyalkylsulfinic acid or a hydroxyalkylsulfinic acid salt,
- wherein steps (a), (b) and (c) are carried out in succession in a single liquor.
1 more element
Dependencies are inferred from the claim text.