Fluorescent Brightener for Paper Industries

 

VIOPHOR BA CONC PDR Specially developed for high temperature stable product and gives very strong neutral white effects. Most suitable by exhaust application on cellulose fiber, polyamide, silk and wool and their blends and in paper industries for high whiteness paper.

 

 

GENERAL PROPERTIES:

Appearance                                        Pale Yellow powder

Chemical constitution                       Stilbene Derivative

Ionic properties                                  Anionic

Hue (Shade)                                        Neutral White Effect

Solubility                                            40 to 50 grams per liter in cold soft water

Compatibility                                      Not compatible with cationic auxiliaries .

pH of 1% aqueous solution              8-9

 

 

Application in paper

VIOPHOR BA CONC PDR should be added where the stock is vigorously agitated. For discontinuous addition, e.g. in the pulpier, beater or mixing chest, it is advisable to prepare highly dilute VIOPHOR BA CONC PDR solution and to prevent mottling. Generally 0.2 to 0.3% VIOPHOR BA CONC PDR powder to the weight of dry Pulp is sufficient for the medium degree of whiteness. However in special cases VIOPHOR BA CONC PDR powder up to 0.5% of the weight of dry pulp can be used to get very high degree of whiteness.

 

 

Stability in the wash liquor

 

Hard water

Good. The intensity of white effect is not affected by chemicals causing hardness

 

 

Alkali

Good. VIOPHOR BA CONC PDR is stable for considerable periods. In strongly alkaline media even at temperatures above 100*C.

 

 

Peroxide

Good. Peroxide additions to the wash liquor do not impair the intensity of the white effect.

 

 

Chlorine

Poor, VIOPHOR BA CONC PDR. Is slowly destroyed  in a hypochlorite solution but when fixed on the goods it has good fastness to chlorine.

 

 

Storage Stability

Stable if stored away from sunlight under roof and cool condition.

 

 

Toxicology & Ecology

VIOPHOR BA CONC PDR. Doesn’t: present any special hazard when used for the recommended applications provided the usual elementary safety and hygiene rules for handling chemicals are observed.