Do you know the history of the optical brightener KSN?
Optical brightener KSN source from Germany, model Hostalux KSN. CAS No 5242-49-9,
content (%) 99.
Appearance Yellow powder,
applied to the plastic industry.Fluorescent brighteners with "high fastness" produce a very brightwhite effect with a neutral to blue violet hue as well as high lightfastnessand excellent migration resistance, especially on LDPE.
Opticalbrighteners KSN for plastics and synthetic fibers; It is suitable for thewhitening of polyester, polyamide, polyacrylonitrile and other fibers, silkfabrics and wool fabrics. Widely used in film, injection molding and extrusionmaterials, it is suitable for the processing of all plastics and is well suitedfor the whitening and polymerization stages of any processing stage ofsynthetic polymers.
KSNis an optical brightener applied to plastic and polyester fibers in a highlyconcentrated additive method. The high-brightness optical brightener has aneutral to blue-violet whitening effect for light-toned products and makes thecolor brighter, and has significant migration resistance in LDPE.
Thermallystable for the processing of plastics and synthetic polymers
Uses:Fluorescent brightener KSN is very suitable for whitening in the process ofprocessing synthetic high polymers, such as the dyeing of thin films, injectionmolding, compression molding, chemical fibers, hard bristles and colored waxbristles. It can be used in a similar way to pigments, plastic additives orsynthetic fiber additives.
Howto use: Add 20-300ppm to colored plastic. Transparent plastic is usually addedat a dosage of less than 5-20 ppm.
Themaximum dosage is 100 ppm for thermoplastic PVC and 500 ppm for hard PVC. Theaverage amount of polyester fiber used is 100-250 ppm.
Theproduct can be added during transesterification or at the time ofpolycondensation and mixing, and it can also be added to plastics and fibers inthe form of brightening masterbatch, so the amount of brightening masterbatchis 0.5-20%.
Clariant:KSN, KCB.
BASF:OB, OB-1, CBS-X.
Eastman:OB-1.