AVCO-RETARDER CAT

CATIONIC DYE RETARDER
AVCO-RETARDER CAT is a levelling agent with affinity to acrylic fibres, which in the beginning of the dyeing process goes on to fibre dyeing sites faster than the dyestuff molecule, herewith lessening the absorption rate of the dyestuffs. It slows down the rate of exhaustion of the cationic dyes in the critical range of the heating phase (above 80°C). Due to this retarding effect it promotes the even uptake of the dyes.

SPECIFICATION:

Appearance Slightly yellowish clear liquid
Chemical nature Quaternary ammonium compound in aqueous solution
Compatibility Incompatible with anionic products
Ionicity Cationic
pH (5% sol) 7 ± 0.5
Solubility Miscible with water at any ratio
Storage Freezes below O°C. Fully usable after thawing. Storage stability is 12 monthes at least.

PROPERTIES & USES:

  1. High levelling efficiency to cationic dyestuffs.
  2. Excellent balance of retarding and levelling.
  3. Improves migration of cationic dyestuff.
  4. Colour yield is not reduced when the recommended concentrations are used.

APPLICATION:

As a general rule the amount of retarder employed in the dyeing, will depend on the exhaust rate of each dyestuff, saturation factor of the acrylic fibre to be dyed and depth of shade required.

The following concentrations of AVCO-RETARDER CAT are recommended:

% dyestuff

up to 0.5

0.5-1

1-2

2-3

3-5

% AVCO-RETARDER CAT

3-2.5

2.5-2.0

2.0-1.5

1.5-1

0.5
To receive exact concentration of AVCO-RETARDER CAT in the dye-bath use the following formula:
SF – C1 · SBF1 + C2 · SBF2 + C3 · SBF3 = % AVCO – RETARDER CAT
0.7
SF – saturation factor of the acrylic fibre
C 1, 2, 3 – quantities of application of dyestuffs
SBF 1,2,3 – saturation factors of each dyestuff
This formula is only an indication, and initial laboratory trial should be made before big scale dyeing.