OPTICAL BRIGHTENER 4BK cas no.:27344-41-8

Main chemical name: stibene bistriazine derivativeSpecification: Appearance: Slight yellow uniform powderFluorescent color: Slight BluishMoisture: 5% (max)Fineness (120 mesh residue): 5% (max)Property: 1.with strong fluorescene, excellent whitening performance and slight bluish shade.2.With high light stability and chemical stability..3.Good acid stability, stable in perborate and hydrogen peroxide.Application: Main be used in whitening of cotton fabric and polyester/cotton blends, T/C whitening in one bath.Treating Process:1.Exhausting process: 0.1-0.8%(O.W.F.)     bath ratio: 1:10-1:30,temperature: 90-100 ºCX30-40min→ wash→dry.The processing can be adjusted according to the actual situation.One bath process of scouring hydrogen peroxide bleaching and whitening:Dosage: 02.-0.8%(o.w.f.)     hydrogen peroxide: 5-15g/LStabulizer: 1-5g/L     NaOH: 2-4g/LScouring agent: 0.5g/L     bath ratio: 1:10-30temperature: 90-100 X30-40min→ wash→dry The processing can be adjusted according to the actual situationPacking: 50kg fiber drum