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Leucophor BNB

Leucophor BNB

Universally applicable fluorescent brightener for cellulosic fibres and particularly suitablefor application on the padding machine, in the continuous bleaching process and finishingliquors

Leucophor BNB is a fluorescent brightener for cellulosic fibres and their blends withsynthetic fibres. Leucophor BNB produces brilliant whitening effects with a blue shadeand good light and wet fastness properties.

Leucophor BNB is distinguished by its low substantivity, good stability to peroxide andcompatibility with the products used in finishing white goods. It is therefore particularlysuitable for brightening woven and knitted goods by the padding process, for application

in the continuous bleach, in filling and handle finishes, as well as in resin finishes withmetal salt catalysts.

Leucophor BNB possesses an excellent levelling power which also facilitatesbrightening by the exhaust process and in the peroxide bleach on machines where workis carried out with a short l iquor ratio.

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1. Properties:

Appearance : Pale yellow powder

Chemical character : Anionic stilbene derivative

Storage stability : Practically unlimited

Solubility : In water at:20C 150 g/l50C 200 g/l100C 300 g/l

Effect of light : Working solutions should be protectedagainst light.

Stability in the liquor to:

- hard water

-alkalis

- acids

- metal salt catalysts- hydrogen peroxide- hydrosulfite- hypochlorite- sodium chloride

:

::

:::::

Very good

GoodGood, down to pH 5 in acid catalyzedsynthetic resin liquorsGoodVery goodGoodUnstableUnstable

Compatibility of Leucophor BNB with finishing chemicals:

Very good compatibility

Limited compatibility

:

:

- with the usual synthetic resinprecondensates and catalysts

in the range above pH 5.- with filling agents on the basis

of starch and syntheticpolymers.

- with anion-active and nonionicwetting agents.

- with anion-active and nonionicsoftening agents.

- with cation-active softeningagents (suitability should bedetermined in preliminary tests.

- if nitrate catalysts are applied,

the goods must be washed inorder to obtain optimum lightfastness ratings.

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2. Fastness properties:

Xenon lamp1) Rating 3-4

Washing 4, 95C ISO Rating 4Hypochlorite bleaching, severe ISO Rating 4-5

3. Scope of application

On neutral and regenerated cellulose fibres, Leucophor BNB produces brilliantwhitening effects with a distinctly bluish shade.

4. Application

4.1 Dissolving:

Leucophor BNB Powder pour on 10 times the amount of hotwater and dissolve by stirring

5. Guideline recipe:

5.2 Continuous peroxide bleach:

(pad roll, J box)0.5-2 ml/l

Hostapal-MRZ Liquid

10-20 ml/l Stabilizer CWP Liquid2-5 g/l Caustic soda (solid)10-15 ml/l Hydrogen peroxide 35%1-5 g/l Leucophor BNB Powder

pad (pick up 80-100%)store for 60-90 min at 90C

5.3 Exhaust process

- exhaust process with an addition of salt0.2-0.4 % Leucophor BNB Powder2-5 g/l Glaubers salttreat for 30-40 min at 60-90C

If levelling difficulties occur, add the salt 10-15 minbefore the end of the treatment.

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- Peroxide bleach (jigger)1 g/l Hostapal DTC Paste0.2 g/l Magnesium chloride3 ml/l Water glass 38Be/71.5Tw5 ml/l Caustic soda 36Be/66.5Tw

5-8 ml/l Hydrogen peroxide 35%0.2-0.6 % Leucophor BNB Powder

bleach for 60-90 min at 80-90C

Many of their dyestuffs, pigments and chemicals are patented by Clariant Ltd or its affiliates in numerous industrial countries.

Trademark registered by Clariant Ltd or Clariant GmbH in numerous countries.

* Trademark licensed to Clariant Ltd in numerous countries.

+ Manufacturer's registered trade mark

The signs , * and + appear only at the first mention of the product.

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.