VIOPHOR BSB LIQUID (IN TEXTILE)
BSB LIQUID is a high substantive Optical Whitening Agent for natural and regenerated fibers, particularly suitable for the exhaustion method.
Properties:
Chemistry : Derivative of Stilbene Disulphonic Acid
Appearance : Reddish Brown Liquid
Ionic Nature : Anionic
Shade : Blueish to Neutral White
Solubility : Soluble in all proportions
Substantively : High
pH (I & aq soln) : 8.5 – 9.0
It is insensitive to medium hard water (approx. 15 Degree German)
Stability:
IN SOLUTION ON THE FIBRE
Peroxide Very Good Very Good
Hydrosulphite Very Good Very Good
Chlorine Not Stable Good
Acids Not stable under pH 5 Not stable under pH 5
Alkalis Very Good Very Good
Fastness: Light 3 – 4
Washing 5
Applications:
Application on Cellulose
(a) Winch or Jet Bleaching Hydrogen Peroxide 50% 8mls/liter
Caustic Soda 0.5 gpl
Organis Stabilizer 1 – 2 gpl
Wetting Agent As required
BSB POWDER 0.22 – 0.4% on wt. of
fabric
(b) Jig Bleaching Hydrogen Peroxide 50% 3 – 5 %
Caustic Soda 1 – 1.5 %
Organis Stabilizer 1 – 1.5 %
Wetting Agent As required
BSB POWDER 0.22 – 0.4%
(c) Package Bleaching Hydrogen Peroxide 50% 13 mls/liter
Caustic Soda 0.5 gpl
Organis Stabilizer 1 – 2 gpl
Wetting Agent As required
BSB POWDER 0.22-0.4% on wt. of fabric
In each case the bleach is normally carried out @ 100 Degree C for approximately one hour.
| 2. | Application on Polyester/Cotton with Blends | The bleaching of Polyester/Cotton Blend is generally carried out bleach liquors similar to those used for 100% cotton fabrics as detailed in section 1. |
| 3. | Application on Polyester/Cotton with Blends | BSB Liquid can be used to obtain solid whites on bleached cotton/Polyamide blends by application from stabilized hydros at 100°C at 6-7 pH for half an hour. |
| 4. | Application on Polyester/Cotton Blends Application Polyamide | Although BSB Liquid is application to nylon from a slightly acidic bath at pH 5.5 at a temperature of 100° C, preferred method of application is as follows. BSB POWDER 0.5-1.2% on wt. of goods Stabilized hydros 1 – 3 gpl Temp 90-100° C Time 30 minutes |
Note:
(i) Dilute solutions must not be exposed to natural light
(ii) Do not use cationic auxiliaries
(iii) Heavy metal ions may interface with the effect of anionic Optical Brighteners. This can be avoided by adding suitable chelating agents