Optical Brightener OB (C.I. 184)

Are you looking for optical brightener OB supplier and wholesalers? Here at Shanghai Huixiang Industrial Co., Ltd. we provide optical brightener OB that is highly effective in polymer substrates such as engineering plastics, PE, PC, PVC etc. For more detail about Optical Brightener OB contact us at +86-21-31122722.

  • Model: Optical Brightener OB (C.I. 184)

Optical Brightener OB (CI 184)

1Item name:  2,2-(2,5-Thiophenediyl) Bis [5-(1,1-dimethylethy)]-Benzoxazole



         Appearance:                                        pale yellowish color powder

         Molecular Formula:                             C26H26O2N2S

         Molecular Weight:                             430

CAS No.:                                           7128-64-5

         Melting Point:                                    196-203

         Assay:                                                98.0% min.

     Ash:                             0.3%max.

Volatile Content:                                 0.3%max.

Max. Absorption Wavelength:              375nm(in ethanol)

Max. Emission Wavelength:                 435nm(in ethanol)



Optical Brightener OB is highly effective in polymer substrates such as engineering plastics, PE, PC, PVC, PS, ABS, and PP, adhesive and other organic substrates.

Main applications include fiber, molded article, film and sheet. And also can be used in clear lacquers, pigmented lacquers, paints, printing ink and synthetic leather. It will produce brilliant brightness with dyestuff, which is very efficient in directions for multicolor.

OB features excellent resistance to heat, exceptional whitening properties, good light fastness and low volatility.


4Application (in each 100kg polymer):

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)

           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.

When  OB is used in PMMA polymerization, take care that the polymerization is conducted to full completion since interaction with residual monomer can cause discoloration in the final application.



         Please mix thoroughly to obtain best effect. OB concentrated master batch can be even better mixed.



         25kg / fiber drum with PE liner


7Safety and Stock:

Keeping in stock as ordinary chemicals. Wear protective goggles and gloves while applying. Avoid direct contact with skin and eyes. Soap clean if skin contaminated.

Seller makes no representation or warranty, express or implied, including of merchantability or fitness for a particular purpose.

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