Optical brightener OB
Chemical Name 2.5-bis(5-tertbutyl-2-benzoxazolyl)thiophene
Molecular Formula C26H26SO2N2
Molecular Weight 430.575
CAS Number 7128-64 -5
Specification
Appearance: Light yellow powder
Assay: 99.0% min
Melting Point: 196 -203°C
Volatiles Content: 0.5% max
Ash content: 0.2% max
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.
Usage
(With plastic raw material weight percentage)
1. PVC Whitening: 0.01 ~ 0.05%
2. PVC : To improve brightness: 0.0001 ~ 0.001%
3. PS : 0.0001 ~ 0.001%
4. ABS: 0.01 ~ 0.05%
5. Polyolefin colorless matrix: 0.0005 ~ 0.001%
6. White Matrix: 0.005 ~ 0.05%
Package and Storage
1. 25kg drums
2. Stored in a cool and ventilated place.
