• Optical Brightener ST-2

    Optical Brightener ST-2

    ST-2 high-efficiency fluorescent whitening agent can be arbitrarily dispersed in soft water, acid and alkali resistance is pH=6-11, it can be used in the same bath with anionic surfactants or dyes, non-ionic surfactants, and hydrogen peroxide. Used in coatings, organic salts are incompatible with organics, and the coatings are easy to migrate and yellow after drying.

  • Optical Brightener FP-127

    Optical Brightener FP-127

    It has the advantages of high whiteness, good shade, good color fastness, heat resistance, good weather resistance, and no yellowing.It can be added to the monomer or prepolymerized material before or during polymerization, polycondensation or addition polymerization, or it can be added in the form of powder or pellets before or during the molding of plastics and synthetic fibers. It is suitable for all kinds of plastics, but it is especially suitable for the whitening and brightening of artificial leather products and the whitening of sports shoe sole EVA.

  • Optical Brightener OB

    Optical Brightener OB

    Optical brightener OB is one of the best brighteners widely used in plastics and fibers and has the same whitening effect as Tinopal OB. It can be used in thermoplastics, polyvinyl chloride, polystyrene, polyethylene, polypropylene, ABS, acetate, and it can also be used in varnishes, paints, white enamels, coatings, and inks.It also has a very good whitening effect on synthetic fibers.It has the advantages of heat resistance, weather resistance, non-yellowing, and good color tone.It can be added to the monomer or prepolymerized material before or during polymerization…

  • Optical Brightener OB-1

    Optical Brightener OB-1

    1.Suitable for whitening of fibers such as polyester, nylon and polypropylene.

    2.Suitable for whitening and brightening of Polypropylene plastic, ABS, EVA, polystyrene and polycarbonate etc.

    3.Suitable for addition in the conventional polymerization of polyester and nylon.

  • Optical Brightener PF-3

    Optical Brightener PF-3

    Fluorescent brightener PF-3 can be dissolved with plasticizer and then milled into a suspension with three rolls to form a mother liquor. Then stir in the PF-3 plastic fluorescent whitening agent suspension uniformly during the processing, and shape it at a certain temperature (the time depends on the temperature), generally at 120150℃ for about 30 minutes, and 180190℃ for about 1 minute. 

  • Tris(hydroxymethyl) Methyl Aminomethane THAM

    Tris(hydroxymethyl) Methyl Aminomethane THAM

    Mainly used in pharmaceutical intermediates and biochemical reagents. Intermediate of fosfomycin, also used as vulcanization accelerator, cosmetics (cream, lotion), mineral oil, paraffin emulsifier, biological buffer, biological buffer Agent.



    The fluorescent whitening agent KSNp not only has excellent high temperature resistance, but also has good resistance to sunlight and weather. The fluorescent whitening agent KSN is also suitable for the whitening of polyamide, polyacrylonitrile and other polymer fibers; it can also be used in film, injection molding and extrusion molding materials. The fluorescent whitening agent is added at any processing stage of synthetic polymers. KSN has a good whitening effect.

  • Optical brightener OEF

    Optical brightener OEF

    Optical brightener OB is a kind of benzoxazole compound, it is odorless, hard to dissolve in water, soluble in paraffin, fat, mineral oil, wax and common organic solvents. It can be used for whitening and brightening solvent-based coatings, paints, latex paints, hot melt adhesives and printing inks. Low dosage, high efficiency and environmental protection, with special effects on the ink.

  • Optical brightener OB  Fine

    Optical brightener OB Fine

    Optical brightener OB Fine is a kind of benzoxazole compound, it is odorless, hard to dissolve in water, soluble in paraffin, fat, mineral oil, wax and common organic solvents. It can be used for whitening thermoplastic plastics, PVC, PS, PE, PP, ABS, Acetate fiber, paint, coating, printing ink, etc. It can be added at any stage in the process of whitening the polymers and make the finished products emit a bright bluish white glaze.

  • M-Phthalaldehyde


    M-phthalaldehyde is used in pharmaceutical intermediates, fluorescent brighteners, etc.

  • 1,4-Naphthalene Dicarboxylic Acid

    1,4-Naphthalene Dicarboxylic Acid

    1-methyl-4-acetylnaphthalene and potassium dichromate are oxidized for 18h at 200-300 ℃ and about 4MPa; 1,4-dimethylnaphthalene can also be obtained by liquid phase oxidation at 120 ℃ and about 3kpa with cobalt manganese bromide as catalyst.

  • 2,5-Thiophenedicarboxylic Acid

    2,5-Thiophenedicarboxylic Acid

    Adipic acid and thionyl chloride were mixed in the weight ratio of 1: (6-10) and refluxed for 20-60 h in the presence of pyridine catalyst. The solvent was evaporated and the residue was heated at 140-160 ℃ for 3-7 H. Thiophene-2,5-dicarboxylic acid was obtained by sodium hydroxide treatment, acid precipitation, filtration, decolorization and purification.

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