Optical Brighteners for polyester DP-3

Chemical name Stilbene derivative Structural formula Specification Appearance: Grey liquid Fluorescent Color: Similar to the standard sample Whitening strength: 100±3( compared with standard sample) PH value 6.0 8.0 Ionic characternonionic Treating process: 1)Pad-thermos fixing process DP-3 1 5g/l (should be adjusted according to the sample testing), procedure: pad(two dips and two squeezes, residual liquor content 70) dry cure (180 200°C,20 30S) Attention: The goods must be rinsed thoroughly after pretreatment to ensure the PH below 8 the PH of the pad lipuor should be adjusted to 4 5 with acetic acid. 2) HT exhausting process DP-3 0.1 0.53%(o.w.f) liquor ratio 1:10 30 Treating temperature 120 130°C treating time 30 60min PH 5 10(5 7 is specially recommended) Use: Mainly used in whitening of polyester fabric and its blends with strong fluorescence, whitening performance, good fastness to light, wash and excellent fastness to sublimatiom. Package: It is packed in 50Kgs plastic barrel .