Fluorescent brightener OB
Chemical
name: 2.5-bis(5-tertbutyl-2-benzoxazolyl)thiophene
Structural
formula:
Molecular
formula:
C26H26SO2N2
Molecular
weight:
430.575
CAS No.: 7128-64 -5
C.I.: 184
Properties:
It is hard to dissolve in water. It dissolves in paraffin, fat, mineral oil, wax and common organic solvents. The hue of the fluorescent light is blue light. The wave length of the maximum absorptive light is 375nm (ethyl alcohol)
Specifications:
Appearance: Bright yellow green crystal powder.
Melting point: 196 -203°C
Assay: 99.5% min
Volatile Content: 0.3% max
Ash: 0.3% max
Max wavelength absorption spectrum: 375nm (in ethanol)
Fineness: Through 200 meshes.
Directions:
PVC: White 0.01-0.05 ( 10g -50g )
Transparent 0.0001-0.001% ( 0.1g -1g )
PS: White 0.001% ( 1g )
Transparent 0.0001-0.001% ( 0.1g -1g )
ABS: Primitive color 0.01-0.05% ( 10g -50g )
(YC Fluorescent Brightener OB can effectively eliminate the intrinsic yellow color in ABS)
White 0.01-0.05% ( 10g -50g )
PE, PP: Achromaticity 0.0005-0.001% ( 0.5g -1g )
White 0.005-0.05% ( 5g -50g )
Other Plastics: Refer to the directions given above.
Application:
It is used in thermoplastic plastics. PVC, PE, PP, PS, ABS, SAN, SB, CA, PA, PMMA, acrylic resin., polyester fiber paint, coating the brightening of printing ink. .
Package:
Packing in 25kg fiber drum. It also can be packed 250kg in big bag or according to the requirement of the customers.
Storage:
Stored in dry and ventilate place.
