NARSIL – 7 is widely used as a versatile defoamer in general industrial applications using Petroleum Oil Solvents and aliphatic and Aromatic liquids medium.
Adhesives : Paper Coating Processes
Asphalt : Paper Production Processes
Cutting Oils : Petroleum Pitch
Detergents & Soaps : Propane Gas
Gas Scrubbing : Rubber Lactices
Glycol Dehydrates : Resins and Varnishes
Insecticides : Salt Solutions
Oil Quenche Baths : Steel-picking Solutions
Polishes : Vacuum Distillations
Wool Facts : Wire Drawing compounds
As an aid to improve the visual field in gastroscopic examination.
HOW TO USE
NARSIL – 7 is effective in very low concentrations. 1 to 50 gms of NARSIL – 7 per ton foam is Sufficient to suppress most foams. For any new industrial application, the user may start with a concentration of 20 Gms per ton. Then increase or decrease this concentration until most economical use level is established.
In most industrial application, it is diluted with solvent then added to foamer, dispersions may be made by Butyl Alcohol, Toluene, Xylene, Kerosene, Ethyl ether, Chloroform, and many other solvents. Comparative tests using different diluents should be run if it is desirable to determine the most suitable and economical diluents to use for any particular process or product. Freshly prepared dispersion should be used for maximum efficiency.
SPECIFICATION FOR NARSIL – 7
Test : Specification Requirements
Defoaming performance : 15 Seconds Max at 50 p.p.m.
Color : Transparent
Consistency : Liquid thin
Sp. Gravity at 25°C : 0.857 to 0.900
Suitable Diluents : Aliphatic, Aromatic and Chlorinated Solvents
Odor : Slight
Shelf Life : 1 Year
Method of Performance Test
- Prepare a sample of defoamer by mixing 0.5 gm of sample and 50 c.c. Butyl Alcohol.
- Take 1 gm Triton x 100 in a small flask and 99 c.c. distilled water.
Add 0.5 of sample from (a) and shake the flask vertical wrist movement for 10 seconds, then place the flask on the table and count the time required for the foam to collapse. (The point at which a portion of liquid surface can be observed)
Maximum time should be 15 seconds at 50p.p.m. as added above.