Optical brightener OB & OB-1 both can used for plasics,but many customers think they are the same product,that is because they do not know the differences between OB & OB-1.Even they are different products,but their appliaction and end products are the same,they both can be used for PP,PVC,PE,PET etc products.
Now we want to explain the differences between OB 184 and OB-1 393.
In fact,optical brightener OB is totally different material from optical brightener OB-1.
The different raw material between Optical Brightner OB 184 and OB-1 393:
Optical Brightner OB 184 main raw material:2,5-Thiophenedicarboxylic acid，2-Amino-4-tert-butylphenol
Optical Brightner OB-1 393 main raw material:2-Aminophenol
The data sheet differences between Optical Brightner OB 184 and OB-1 393:
Chemical Name:Optical Brightner OB 184:2,5'-Bis[2-(5-tert-buty l-2 benzoxazoly)thiophene
Optical Brightner OB-1 393:2.2’-(4.4’-diphenol vinyl) dibenzoxazol
C.I No.:Optical Brightner OB 184:184
Optical Brightner OB-1 393:393
CAS No.:Optical Brightner OB 184:7128-64-5
Optical Brightner OB-1 393:1533-45-5
Molecular Formula：Optical Brightner OB 184:C28H18N2O2
Optical Brightner OB-1 393:C26H26N2O2N2
Molecular Weight：Optical Brightner OB 184:414
Optical Brightner OB-1 393:430
Technical Index differences between Optical Brightner OB 184 and OB-1 393:
Optical Brightner OB-1 393 technical Index:
Appearance:yellowish green powder
Melting Point:357~359°C
Purity:≥99%
Optical Brightner OB 184 technical Index:
Appearance:slight greenish yellow powder
Melting Point:200-202°C
Purity:≥99%
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