Chemical-Physical Characteristics
CERTIFICATIONS
ZDHC 3, ECO PASSPORTComposition
Diformate of ethylene
Physical aspect
Colorless liquid
Ion charge
Weakly anionic
pH (5% solution)
6 ± 0.5
Solubility
Excellent in cold water. Do not dilute with hot water before use.
Storage stability
Prolonged under normal conditions storage
Dosage
The dyeing bath is prepared at the desired starting pH, with the possible addition of alkali (diluted
caustic soda, ammonia, borax, etc.) to:
pH 8 – 11 for polyamide fibers
pH 7 – 7.5 for wool
The desired final pH is adjusted by dosages of DONER 121 according to the temperature. The
addition is necessary for the lowering in part of the pH in a continuous way, in operation
the needs of the dyeing process with pH control. This can be done at the beginning of the
heating phase or at boiling temperature after the migration phase in an alkaline environment.
If the addition is made for overflow, the filling height must be as low as possible in order to avoid
premature hydrolysis of the product in hot water.
Dosage: 0.5 – 2 g / l DONER 121 depending on the desired final Ph.
Properties
DONER 121 is used in dyeing baths of polyamide and wool fibers with acid, reactive, chromium
and metal-complex dyes.
DONER 121 progressively releases, depending on the temperature, an organic acid by gradually
lowering the pH of the dyeing bath, allowing excellent equalization of the dye on the fiber.
DONER 121 allows you to work at very low pH values, values at which the dyes are completely
exhausted, thus guaranteeing good reproducibility of the dyes.
The duration of the dyeing is reduced thanks to the rapid exhaustion of the bath, the departure
at a higher temperature than normal and the reduction of the migration phase. This method of
operation allows at the beginning to introduce the material into the bath at a temperature
ranging from 70 – 100 ° C.
Working with hard water or water rich in temporary hardness, the latter can serve as an alkalinity
generator and in this case it is necessary to check the final pH of the dye bath for a correct
dosage of DONER 121
Additional info
The above information is only indicative. Therefore please contact i
our technicians for assistance and for anything not mentioned in this document.
without guarantee
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