China
联系人 Ms. Monica
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Optical Brightening Agent OB*1
Performance:
Optical Brightener are added to many materials to reduce yellowing, improve whiteness, and to enhance the brightness of a product. OB*1 is used widely in the plastic market. Because of its excellent brightening ability, good thermal stability, and compatibility with many polymers.
Typical Properties:
Chemical name: 2,*-(1,*-Ethenediyldi*4, *-phenylene) bisbenzoxazole
Molecular weight: **4.4
CAS No.: ********5
C.I.: **3
Specifications:
Ash %: 0.3max
Empirical Formula: C*8H*8N2O2
Melting Point(DTA),C: ******9
Appearance: Yellowish Green Powder
Odor: Free of odor
Volatile Content %: 0.3max
Assay %: *9min
Particle Size: **0 meshes
Effect of Optical Brighteners on the Whiteness of Polymers:
Optical brighteners function by absorbing ultraviolet radiation and remitting blue light. The emitted blue light will reduce the yellow color of a polymer. In the presence of a whitening agent, such as TiO2, the use of OB*1 will produce a brilliant white or white than white appearance.
Two primary factors affect the whiteness/yellowness of a formulation. They are the color of the base polymer and the level of brightener added. If no whitening agent, such as TiO2, is used, the level of OB*1 required will likely be lower than when a whitening agent is preset. This level might be as little as ****0 ppm. In determining the optimum concentration of brightener, the effect of any other UV-absorbing materials in the plastic should be considered. It is important that users perform sufficient evaluations to determine the optimum level of OB*1 for their specific end uses.
Methods of Addition:
To be effective, an optical brightener must dissolve in the polymer to which it is added. Since the typical addition levels for OB*1 in the range of ******0 ppm, the use of a concentrate, or masterbatch, is recommended. Concentrates are containing 1%**0% by weight of OB*1 typical.
The concentrate can be produced on an extruder using normal processing conditions for the polymer, including drying if necessary. The concentrate is then let down to typical use levels in the final formulation. Plastics compounding equipment is normally adequate for producing OB*1 brightener formulations. The key requirement is to thoroughly disperse the brightener so that it will dissolve uniformly throughout the molten polymer. This is usually achieved most readily with a concentrate.
Improving Whiteness of Recycled Polymer:
The business of processing post consumer plastics and waste polymer continue to grow. These materials can be recycled into a variety of useful products, from plastic lumber to synthetic fiber. Polyester bottle polymer, polyester plastic waste, and waste fiber polymer can be recycled into polyester fiber that can be used in carpets, filling and insulation material, nonwovens, and apparel. One of the shortcomings of processing these materials is the uncertainty of the color of the source material.
By using optical brighteners, the value of the recycled materials can be significantly enhanced by providing a more uniform white. OB*1 will greatly improve the whiteness, Normal fiber applications require only ******0 ppm in new polymer, but recycled material may require as much as ******0 ppm. Optical brighteners are very effective in improving the appearance of the polymer or fiber. Off-class or second-quality nylon polymer can also be improved in the same way.
Food Industry Applicable:
OB*1 complies with regulations for indirect food additives. OB*1 is restricted to use as an optical brightener for all polymers at a level not to exceed 0.**5% by weight of polymer and at the temperatures not to exceed **5"C(**5"F).
Packing:
*5kg / fiber drum with PE liner
Size of drum: Height: *1cm Diameter: *2cm
(Remark: The information of our products is for reference only. We are not responsible for any unexpected results or patent dispute caused by it.)
国家: | China |
型号: | OB-1 |
离岸价格: | ( Negotiable ) 获取最新报价 |
位置: | - |
最小订单价格: | - |
最小订单: | 100 Kilogram |
包装细节: | 20/25 kg one drum |
交货时间: | in 15 days after receipt the payment |
供应能力: | - |
付款方式: | L/C, T/T |
產品組 : | Optical Brightener |