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Optical Brightening Agent OB-1 by Zhejiang Hongda Chemicals acts as an optical brightening agent. It gives an appearance of greenish yellow powder and is mainly used in whitening of polyester, as well in the whitening of nylon during polymerization. 4,4’-bis(4,4’-cyano-phenlene)-benzene. Acts as an optical brightening agent for polyester fiber. It shows strong fluorescence with bluish color shade and an excellent fastness to sublimation. It is also used for raw material of making paste form brightening agent in textile dyeing. 4,4’-bis(3,4’-cyano-phenlene)-benzene. Acts as an optical brightening agent for polyester fiber. It shows strong fluorescence with bluish color shade and an excellent fastness to sublimation. It is also used for raw material of making paste form brightening agent in textile dyeing. 7-Diethylamino-4-methylcoumarin. Acts as a multipurpose brightener with an excellent whiteness, good solubility as well as compatibility. It appears as a off-white powder and is soluble in ethanol but insoluble in water. It is used for H-pvc, S-pvc, polyamide fiber as well as for acrylic fiber. 4,4’-bis(2,2’-cyano-phenlene)-benzene. Acts as an optical brightening agent for polyester fiber. It shows strong fluorescence with bluish color shade and an excellent fastness to sublimation. It is also used for raw material of making paste form brightening agent in textile dyeing. 4,4’-bis(2,3’-cyano-phenlene)-benzene. Acts as an optical brightening agent for polyester fiber. It shows strong fluorescence with bluish color shade and an excellent fastness to sublimation. It is also used for raw material of making paste form brightening agent in textile dyeing. Optical Brightening Agent MM by Zhejiang Hongda Chemicals acts as an optical brightening agent for polyester fiber. It is 4,4’-bis(3,3’-cyano-phenlene)-benzene. It shows strong fluorescence with bluish color shade and an excellent fastness to sublimation. Optical Brightening Agent MM is also used for raw material of making paste form brightening agent in textile dyeing. Optical Brightening Agent KCB by Zhejiang Hongda Chemicals acts as an optical brightening agent for synthetic fiber and plastic products, especially for EVA. It is 1,4-Bis(2-benzoxazoly)naphthalene. Optical Brightening Agent KCB gives an appearance of yellow crystalline powder and shows good compatibility with all kinds of plastics with an excellent stability under all kinds of climate. 4,4’-Bis[2-(2-methoxyphenyl)ethenyl]-1,1’-diphenyl. Acts as an optical brightening agent with an appearance of slight yellow powder and is mainly used in whitening of plastics such as PVC, PS, ABS, etc. Optical Brightening Agent EBF by Zhejiang Hongda Chemicals is 2,5-Bis(2-benzoxazolyl)thiophene. Acts as a whitening agent (optical brightener) with blue, white shade and good stability. It appears as a yellow greenish powder and get dissolved in most organic solvent. It is commonly used for polyester, acetate triacetate fibers jinglun, polyvinyl chloride fibers and their blends in all stages of process both at home and abroad due to its fastness.
Optical Brightening Agent
Polymer additives supplied by Zhejiang Hongda Chemicals