Optical Brightener OB

Chemical Structure of OB-1 Fluorescent Whitening Agent 2,2- (4,4-diphenylene) Bisbenzothiazole
Technical specifications: Appearance: Yellow green crystalline powder
Melting point 352 ℃
Fineness less than 300 mesh
Maximum absorption spectrum wavelength 374nm
Maximum fluorescence emission wavelength 434nm

Performance characteristics: Due to the melting point of 351-353 ℃ and the ability to withstand high temperatures of 375 ℃, this product has good heat resistance among all whitening agents, excellent fluorescent whitening ability, good thermal stability, and compatibility with many polymers.
Scope of application: OB-1 is a fluorescent whitening agent for a variety of plastics, widely used in plastics such as ABS, HIPS, PA, PC, PP, EVA, and rigid PVC. OB-1 is also commonly used in polyester short and long fibers, and the addition of OB-1 to polypropylene, nylon, nylon, and polyester can significantly improve whiteness. After adding OB-1 to the recycled polyester fiber waste, bottle material, and chips, the recycled material will appear whiter and the chromaticity of different recycled materials will become more pronounced.
Usage 1. Addition amount of polyester staple fiber: 75-300g/T
2. EVA、 Addition amount of polypropylene, nylon, polyester, etc.: 75-200g/T
Packaging and storage of 25kg cardboard drums or packaging according to customer requirements; Store in a cool, dry, and dark place.
Attention: This product information is for reference, research, and identification only. Our company does not assume any responsibility or disputes arising from this. If you have any technical or usage issues, please contact our company promptly.

OB Fluorescent Whitening Agent Chemical Structure 2,5-bis (5-tert-butylbenzoxazolyl) thiophene
Technical specifications Molecular formula C26H26N2O2
Molecular weight 430
Content ≥ 99.0%
Melting point 198-202 ℃
Appearance: Yellow or yellow green crystalline powder
Ash content ≤ 0.2%
Maximum absorption spectrum wavelength 375nm (in ethanol)
Maximum fluorescence emission wavelength 435nm (in ethanol)

OB fluorescent whitening agent can be widely used in plastics such as PVC, PS, ABS, PE, PP, etc. Due to its superior fluorescent whitening effect, good thermal stability, and low addition amount, it has become one of the commonly used fluorescent whitening agents in China. It is also suitable for whitening polyester fibers, coatings, paints, inks, and acrylic acid. OB fluorescent whitening agent can be used together with dyes to produce special brightness, which is particularly effective in color formulations.
Due to the low amount of fluorescent whitening agent added, it should be thoroughly dispersed to ensure that the whitening agent can be evenly dispersed throughout the entire polymer. If any UV absorber is added to the polymer, attention should be paid to adjusting the dosage of OB fluorescent whitening agent appropriately.
PVC white 100-500g/T ABS natural color 100-500g/T
Transparent 10-100g/T, white 100-500g/T
PS white 10g/T PE, PP colorless 50-100g/T
Transparent 10-100g/T, white 50-500g/T

Safety and Management: This product can be managed as a general chemical. When using, gloves and protective goggles should be worn to avoid direct contact with the skin and eyes. If it comes into contact with the skin, rinse it off with clean water.
Packaging and storage of 25kg cardboard drums or packaging according to customer requirements; Store in a cool, dry, and dark place.