Optical Brightener CL-E C.I.191 reddish tone for Nylon CAS no:12270-53-0 textile chemical auxiliary

OPTICAL BRIGHTENER 191

CHEMICAL STRUCTURE

Hydrazine sulfonate derivatives

PROPERTIES

APPLICATION

It's suitable for Optical Brightening Agent for nylon and cotton. Its high light fastness is over 5 grade. It's for exhaustion and padding process. The quality is counter of Blankophor CLE (Bayer).

PROCESS METHOD

1. Exhaustion process for nylon:

A. Na2SO4 bath:

Dosage: optical brightener 191 0.5-1.5% o.w.f; Detergent: 0.5-1.0 g/l;

Na2SO4:2-3g/l; Acetic acid adjusted PH=4-6; Temperature: 80-130℃;

Time:20-30min;

B. Sodium Chorite bath:

Dosage: optical brightener 191 0.5-1.5% o.w.f; Detergent: 0.5-1.0 g/l;

NaNO3:2-3 g/l; Sodium chlorite:3-8g/l;Complexing agent: 0.5-1.0g/l;

Temperature: 90℃; Time:30-40min;

2. Padding process for nylon:

Dosage: Optical brightener 191 8-30 g/l;Levelling agent: 1-2 g/l; Fixing agent:

5-10 g/l;Temperature: 20-60℃; Dip&squeeze: pick up 80-100%,

baking under 105℃.

3. Dyething method for cotton:

Dosage: H2O2 50% or 35% g/l, stabilizer 1g/l, NAOH 98% 0.6g/l,

Bath rate: 20.

Detailed process is according to customer's request.

STORAGE & PACKING

Sealed in storage, keeping date is 12 months under room temperature.

60kg plastic drum or as per customer's request.