VERNIUM AB 2480

Dyeing Auxiliaries

Dyeing of polyester fibers with disperse dyes at all stages of processing in HT processes on jets and circulating liquor machines_ VERNIUM A8 2480 acid buffer is recommended for pH sensitive dyes like some DISPERSE dyes and also recommended for dyeing of polyester blends. Dyeing of wool fibers with suitable dyes at all stages of processing ensuring the proposed pH 4.5-5 of the ACID dyeing system. VERNIUM AB 2480 acid buffer can also be used for dyeing of any fiber where pH 4.5 is required.

CHARACTERISTICS

Good buffer capacity.
No problem with correct PH measurement.
No impact on fastness.
No extra addition of acid required to adjust the PH.

BENEFITS

Robust dyeing system 'Right First Time' hence cost savings.
No PH change through electrolytes and added substances to the dyebath
No impact on PH through impurities of the fiber or water. Compatible with all auxiliaries and
Easy and safe handling.
Suitable for jets

SPECIFICATIONS

Chemical constitution Organic acid and salts

Ionic character Anionic

Physical form Clear colorless to slightly yellowish liquid

pH (5% solution) 3.5 to 4.5

Specific gravity at 20°CAbout 1

Viscosity< 250mPas (D=100s 1) at 25°C

General stability Stable in hard water, to adds, to alkalis and electrolytes in usual amounts.

Storage stability Stable for 1 year at 20°C in dosed containers not affected by heat or cold.

CompatibilityCan be used together with anionic and nonionic products if carefully applied

Ecology/toxicology The usual hygiene and safety rules for handling chemicals should be observed in storage, handling and use. The products must not be swallowed

For further information, please see the existing Safety Data Sheet.

APPLICATIONS

VERNIUM AB 2480 acid buffer is added to the dyebath at the start of the (HT-) exhaust dyeing cycle. Dissolving/diluting

VERNIUM AB 2480 acid buffer is diluted with water in all proportions and is added to the dyebath before the dyes.

For PES fibers

VERNIUM AB 2480 acid buffer is a complete acid dyeing buffer and no further acid needs to be used The required amount depends on various factors (e.g. amount of dyes. water, additional chemicals) but will normally lie within the limits given below Preliminary trials should be caned out

2.0 g/1 VERNIUM AB 2480 Required amount

Required amount for WO fibers (ACID dyes)

The required amount depends on various factors e.g. kind of wool and its alkalinity or acidity, amount of dyes. water. additional chemicals and also on liquor ratio (see also under notes). It will normally lie within the limits given below Preliminary trials should be carried out.

3.0-5.0 g/l VERNIUM AB 2480

NOTES regarding PES

Due to excellent buffer capacity of VERNIUM AB 2480 acid buffer higher amounts of
alkali might be required for one-bath-two-step dyeing of PES/CEL blends with
disperse/reactive dyes to achieve the required pH for maximum fixation of the reactive

dyes.

For short liquor ratio dyeing of less than 7:1 use 1-2% VERNIUM AB 2480 acid buffer on weight of goods.

If the dyebath contains impurities such as Ca²⁺, Mg’^*, Fe³⁺ and/or Cu²⁺ an addition of 0.2-1.0 g/I VERNIUM LEVEL 4420 is recommended

NOTES regarding WOOL

Due to high acid affinity of the wool fiber itself the amount of usage of VERNIUM AB 2480 acid buffer is generally higher than for PES fibers

For short liquor ratio dyeing of e.g 10^.1 and less, the amount of usage of VERNIUM AB 2480 acid buffer should be at least 5%. Depending on wool quality the amount of product can be even higher. Therefore preliminary trials are recommended in order to achieve the optimum pH for dyeing with ACID dyes (pH 4.5-5).

VERNIUM AB 2480 acid buffer can also be used for dyeing wool blends e.g. PES/WO or PAN/WO where above-mentioned pH is required.

PACKING

This product is supplied in HDPE drums of 50 kg and 200 kg net.

STORAGE AND HANDLING

It is recommended to use personal protective equipment like safetly glasses, face shield and protective hand gloves.
Any splash in the eyes or on the skin must be washed by plenty of running water.