FLUORESCENT BRIGHTENER VBL
MOLECULAR FORMULA: C36H34N12O8S2Na2
MOLECULAR WEIGHT: 872.84 (As International Relative Atom Mass 1997)
Max UV ABSORPTION WAVELENRHTH: 348 nm
EXCUTIVE STANDARD: GB/T10661-2004
|Used for textiles||Used for paper-making|
|Appearance||Light yellow or yellow uniform powder|
|Fluorescent strenghth (equivalent to the Sstandard sample)||100|
|Color Shade||Similar to the standard sample|
|Whiteness (the deviation with the Standard Sample)||—||≥ -3|
|Moisture content||≤ 5.0%|
|Content of Water-Insoluble Impurities||≤ 0.5%|
|Fineness (residual content passed through 250μm-pore sieve )||≤ 10.0%|
|The limitation of 23 kinds of harmful aromatic amines, mg/kg|
the standard GB 19601-2004
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.
Fluorescent whitening agent for cotton fabric and gluing products,
light color or printing products. It show normal sun light
resistance and has good affinity with cellulose fiber, normal level
dyeing result. can be used in printing pulps and exhausting or
Fluorescent whitening agent for polyvinyl alcoholic fiber and
3. Fluorescent whitening agent for paper-making industry, paper
pulp or paints.
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.
PACKAGE: Packed in cardboard bucket or plastic coating paper bag after
being packed in plastic bag first. Net weight is either 25 Kg or 50
Kg per bucket or sack.
TRANSPORTAION: Should avoid sunlight and crash.
STORAGE: Should be stored in cool, dry and ventilated place, and storage
peroid should not exceed 2 years.