Optical Brightener 220 [17 Oct. 2009, 19:25:24]

Main Chemical Composition: Diphenylethylene bistriazine derivative
Structure:

Formula: C40H40N12O16S4Na4
Molecular Weight: 1165
C.I. Number: 220
Appearance: yellow powder
Strength: 100%
Ionic character: anionic
Application: Mainly be used in whitening of cotton fabric, polyamide fabrics and pulp. And also used to increase brightness of light-colored fabrics.
Property:   1.Convenient in application, diluted with water perfectly, suitable for continuous addition.
2.Good acid stability.
3.Great performance in size press and pigment coating mixtures
Treating process: 1.Addition to the pigment coating mixtures: adding in any stage of building coating material. Good performance with the carrier of CMC, PVA and starch. Usual dosage: 0.1~ 3g/ L on dry white pigment.
2..Addition to the stock: adding without dilution. Usual dosage: 0.01~ 0.4% on dry pulp.For actual application, the process should be adjusted according to correspondent sample-test.
3. Addition to the calico whiting. Usual dosage: 0.01~ 0.4% . 80~ 100dip-dye 30~ 40minutes.