optical brightener DT liquid for polyster yellowish liquid cas no. 12224-12-3 C.I. 135 used in low temperature polyste

Optical brightener PF

Chemical name: 1,2-bis(5-methyl-2-benzoxazol)-ethene
Structure:

Formula: C₁₈H₁₄N₂O₂
Molecular Weight: 290
C.I.Number: 135
Appearance: Yellow crystal powder
Melting Point: 182-184ºC
Purity: 98.0%(min)

Maximum UV Absorption Spectrum: 363nm
Property: This product has good effect in whitening polyster fiber under low temperature. The liquid producs made of it are widely used in printing and dyeing industry. It has excellent fastness to light and chlorine-resistant property. It also has good effect in whitening plastic products such as PE, PP, PS, ABS, and PVC, especially plastics under low and middle temperature(130-180℃) as well as coating, printing ink and print
Application method:

1. Relative to weight of materials to be whitened

2. Temperature and time:( 30 minutes, 160℃, one minutes, 180-190℃)

3. The product may be firstly dissolved by using plasticizer , and then grinded into suspension liquid by triple-roller mill. Uniformly add the suspension liquid to plastics which will be whitened under proper temperure(150-180℃)