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the manufacturing process of Fluorescent brightener CBS-127 C.I. 378 CAS No.:40470-68-6

Fluorescent brightener CBS-127 is an important member of the brightener family. It has excellent weather resistance, especially in the whitening application of PVC plastic puree. Because of its light yellow appearance, it is popular among plastic products and artificial Like leather, it is more widely used in pipe profiles. Each brightener has its own unique skill. The ground traffic sign that we are used to daily is its masterpiece-road reflective paint.

  • Brand: Raytop
  • Appearance: Yellow Green
  • Purity: 98.5%
  • Color shade: Blue
  • Finess: 300 mesh
  • Package: 10kg/25kg per fiber drum
  • Shelf Life: 2 years
Call Us: +86-15854199366

Fluorescent brightener CBS-127 is an important member of the brightener family. It has excellent weather resistance, especially in the whitening application of PVC plastic puree. Because of its light yellow appearance, it is popular among plastic products and artificial Like leather, it is more widely used in pipe profiles. Each brightener has its own unique skill. The ground traffic sign that we are used to daily is its masterpiece-road reflective paint.


Next, we will introduce the manufacturing process of Fluorescent brightener CBS-127.


The upstream raw materials of Fluorescent brightener CBS-127 are biphenyl dichlorobenzyl and o-methoxybenzaldehyde, and trimethyl phosphite. The trimethyl phosphite of the Fluorescent brightener CBS-127 plays an important role.


The  manufacturing process of the Fluorescent brightener CBS-127 is divided into two steps: esterification and condensation.


The first is the phosphonate reaction of biphenyl dichlorobenzyl and trimethyl phosphite. The optimal temperature for this process is 140-150 degrees. The reaction is two hours, and 4,4-bis(dimethoxy) is washed with methanol. Phosphonomethyl) biphenyl.


In the second step, methoxybenzaldehyde undergoes a condensation reaction. The o-methoxybenzaldehyde and 4,4-bis(dimethoxyphosphonomethyl)biphenyl react with potassium hydroxide at a temperature of 50 degrees. After 2 hours of reaction, after neutralization, filtration, washing, and drying, the Fluorescent brightener CBS-127 is reacted.



Product Cate:Optical Brightening Agent For Plastic

Product Name:Fluorescent brightener CBS-127

Chemical Name:1,1'-biphenyl-4,4'-bis-benzoxazole

CAS No.:40470-68-6

C.I. No.:378

Molecular Formula:C30H26O2

Molecular Weight:418

Technical Index:Appearance:slight yellow powder 

Melting Point:219-221°C 

Purity:≥99% 

Maximum UV Spectrum Absorption:359nm

Uses:Mainly be used in whitening of plastics such as PVC,PS,ABS,TPR,etc.

Optical Brightener FP-127.jpg


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