Dosage and effect of optical brightener ob-1 393 (C.I.393)

Domestic product name: optical brightener ob-1, DBS. Domestic manufacturers: hangzhou huayang chemical co., LTD., gaoyou auxiliary dosage form factory, guangzhou times chemical plant.
Foreign commodity name and manufacturer: Eastobrite ob-1, ob-3 (ECP).
Color: blue.
Physicochemical properties, optical brightener OB - 1 appearance for green crystalline powder, more than 360 ℃, melting point is 375 ℃ high temperature resistant, is the heat resistance of the best in all fluorescent whitening agent products.
It is insoluble in water, slightly soluble in ethanol, dimethyl formamide, benzene, toluene and other organic solvents, the solubility is also very small. Stable chemical properties, good heat resistance, light resistance and chlorine bleaching resistance. It is resistant to strong acid and alkali, with the maximum absorption wavelength of 374nm and the maximum fluorescence emission wavelength of 434nm. Used for whitening all kinds of plastic products.
Usage: this product is a new product developed by foreign countries in recent years. It was first produced by Eastman kodak. This product is suitable for whitening and brightening plastics such as PE, PP, PVC, HDPE, ABS, PC and PA. Its dosage is low, adaptability is strong, dispersion is good. Can be added after processing or polymerization, whitened high whiteness, with excellent heat resistance, weather resistance properties. This product can also be made into paste for whitening of textiles. Also used for polyester, polyamide fiber slurry coloring, but also for other soluble polymer. The fluorescent whitening agent has low toxicity and can be used to whiten plastic products for food packaging and children's toys.
Dosage: the general dosage of transparent plastic is 0.0025%~0.005%; The general consumption of opaque plastic is 0.01%~0.03%, not more than 0.03%. It can also be made into a content of 1%~10%
The concentrated color masterbatch is then used to process the product according to the additive ratio.
Application performance: its powder products in the high temperature of 300 ℃ above can heat treatment 8 h without decomposition. Can withstand all kinds of treatment conditions. Light fastness varies with substrate type and composition, as shown in the table below.
Light resistance
Matrix type polyvinyl chloride polypropylene polystyrene cellulose acetate
Light fastness grade 4~7  2~4  1~4  2~5 5~7

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