Optical Brightener VBL

Fluorescent Brightener VBL is a typical representative of bis(triazinylamino)stilbene derivative.It can be soluble in 80 times soft water and shows anion character and the pH value resistant to acid and alkali is 6-11 and the expected pH value of dyeing bath is 8-9. When used in acidic solution, the fluorescence will weaken owing to the increase of acid and turns into yellow color. It can resist 300ppm hard water, 0.25% free chlorine, but don't resist the ion of copper and iron. It show stability to rongalite, but cannot be baked at high temperature. It has bluish voilet optical color and can be used in the one.bath with anionic surfactant or dyestuff and nonionic surfactant and oxydol, unsuitable for application in cationic dyestuff and surfactant and raw synthetic resin.

Mainly used in pulp brightening, surface sizing and coating, etc, with high acid resistance. It is the first choice to produce paper of high brightness requirements

l. When used in dyeing industry, add directly into the dyeing bath, solved with water then can be in use. the dosage is 0.08-0.3%, bath ration: 1:40, and the ideal bath temperature: 60℃.
2. When used in paper-making industry, dissolved with 80 times water and added into paper pulp or paints. The dosage is 0.1-0.3% of the dry pulp or paints.

10kg or 25kg/ fiber drums. It can be packed in other forms according to user's requirements.

Shelf life: not more than 24 months in the room temperature.

 

Tonex chemical optical brightener OB, optical brightener OB-1, optical brightener CBS-X and optical brightener BBU Liquid are valiable REACH Cetitificated.

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