Color: blue light

Physical and chemical properties: The appearance is bright yellow-green crystalline powder, the melting point is higher than 360℃, and it can withstand the high temperature of 375℃, which is the best heat resistance among all fluorescent whitening agents at present.

It is insoluble in water, slightly soluble in ethanol, dimethylformamide, benzene, toluene, etc., and has little solubility in other organic solvents. Stable chemical properties, good heat resistance, light resistance and chlorine bleaching resistance.

Resistant to strong acid and alkali, the maximum absorption wavelength of spectrum is 374nm, and the maximum fluorescence emission wavelength is 434nm. It can be used for whitening various plastic products.

Usage: Optical brightener OB-1 has low dosage, strong adaptability and good dispersibility. It can be added in post-processing and polymerization, and the whitened product has high whiteness and excellent heat resistance and weather resistance.

Fluorescent whitening agent OB-1 can also be made into pulp for whitening textiles, coloring raw pulp of polyester and nylon, and other polymers that can melt this product. Fluorescent whitening agent OB-1 has extremely low toxicity and can be used to whiten plastic products for food packaging and children's toys.

Dosage: 0.0025% ~ 0.005% of transparent plastic; Generally, the dosage of opaque plastic is 0.01%~0.03%, not more than 0.03%. It can also be made into concentrated color masterbatch with the content of 1%~10%, and then used for product processing according to the addition ratio.

Application: Its powder product can be heat-resistant for 8h at high temperature above 300℃ without being decomposed.

The above is the performance characteristics of fluorescent whitening agent OB-1, and the above dosage is only a suggested dosage. Before using it, you can make a beating test.