Technical Information
Direfix SD liq
Direfix SD liquid is a formaldehyde-free fixative agent for improving wash fastness
properties of fabrics dyed with Diresul Sulphur dyestuffs.
Direfix SD liq is especially suitable as fixing agent in the Pad-OX and derivative processes
(Denim-Ox, Pad-Dry-Ox, Pad-Steam-Ox) where it is combined with Diresul Oxidant BRI liq
for a total fixation of the dye to the fibre.
The product can also be used as fixing agent in other type of processes such as cationic
fixation of Diresul Black dyes for very high repetitive washing fastness, as well as
afterfixation agent for all Diresul dyes dyed by conventional processes when improving wet
fastness is required.
Direfix SD liq has no influence on the light fastness of the dyeings.
PROPERTIES
Aspect:
White liquid dispersion
Ionic character:
Cationic
Density at 20ºC:
1.25
pH (undiluted):
7.0
Stability to storage:
Good in closed containers between 0ºC and 50ºC.
Solubility in water:
275 g/l in hot (60ºC) water
COMPATIBILITY WITH PRODUCTS
- anionic:
Not compatible
- non ionic:
Good
- cationic:
Good
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STABILITY:
- to acid products:
Good at normally used concentrations.
- to alkaline products:
Possibility of precipitation.
- to salts:
May precipitate at high concentrations of phosphates and
sulphates
FIELDS OF APPLICATION
Direfix SD liq can be used in all kind of standard applications.
-
As fixing agent for Pad-Ox processes
* Pad-OX application:
Direfix SD liq
Diresul Oxidant BRI liq
Acetic acid 80ºC
20-30 g/l
15-20 g/l
15-20 g/l
Time: 45-60 sec
Temp: 70ºC
-
As after fixation agent:
* Exhaustion application:
Direfix SD liq
2-4 %
Liquor ratio 10:1
Time: 20-30 min
Temp: 60ºC
* Continuous application:
Direfix SD liq
15-20 g/l
Pick-up: 70-80 %
Temp: cold
Drying.
The information and recommendations presented here were compiled with the utmost care, but cannot be extended to cover
every possible case. They are intended to serve as non-binding guidelines and must be adapted to the prevailing conditions.
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