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    Optical Brighteners Current Position: home > Optical Brighteners

    Introduction: VBL is a stilbene triazin tetra-sulfonic sodium class optical brightener suitable paper and textile industries.

    Structural Formula:

    Details:

    CAS No:1224-16-7

    Molecular FormulaC36H34N12Na2O8S2

    Molecular Weight872.84

    Appearance: Light yellow uniform powder

    Properties
    VBL as an anionic type Brightener can be soluble in soft water and resistance to acid at pH 6-11. It can’t be resistant to Cu2+and Fe2+ , it is stable to rongalite but can’t be baked under high temperature. it can be used along with anionic surfactant or nonionic surfactant in one bath, and it can’t be used with cationic dyestuff and surfactant.

    Applications
    it is widely used in paper making and pulp or coating industries. Is suitable for polyvinyl alcoholic fiber and polyamide fiber. It can also be used in cotton and gluing products, has good affinity with cellulose fiber.

    Method of usage:

    The recommended loading concentration when used in dyeing is 0.08-0.3%, bath ratio:1:40 under 60

    Please Noted: above recommended loading can be a reference. Exact loading must be determined by specific requirement.
    Packing: 25Kg complex paper bag or carton

    . Recommended loading concentration when used in paper industry is 0.1-0.3%(dry pulp weight). It can be changed depending on substrate, processing conditions, and long-term stability requirements.
     
     
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    -4-Hydroxycinnamic acid
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