Cardanol
Commercial CNSL Under reduced Pressure was distilled at a temperature of 225o C under reduced pressure (1mm of Hg) to obtain cardanol. A pale yellow to brown liquid of refractive index 1.5 at 30o C .Cardanol is a phenol which has a C15 unsaturated alkyl chain with 1-3 double bonds at m-position.Cardanol is a mixture of cardanol 90% and cardol 10%.
Specifications of Cardanol
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Properties |
Grade-I |
Grade-II |
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Appearance |
Water White |
Pale Straw Yellow |
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Color on Gardner Scale |
Max 5 |
Min 12 |
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Specific Gravity @ 30 Degree Celsius |
0.92+-0.01 |
0.93+-0.01 |
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Viscosity CPS |
Max 45 |
Max 65 |
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Viscosity @ 30 Degree Celsius Sec bt f4 CUP |
21+-1 |
25+2 |
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Ash Content % |
NIL |
NIL |
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Volatiles at 163 Degree Celsius |
Max 1.0 |
Max 1.0 |
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Acid Value mg KOH/g |
Max 3.0 |
Max 5.0 |
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Iodine Value (wiz's method) |
200+-20 |
200+-20 |
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Polymerization time in Mins |
Max 12 |
Max 10 |
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Boiling point Degree celcius @ VAC.3 to 5 TORR |
215-218 |
225-230 |
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Application of Cardanol
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Activity |
Application |
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Laminating Industry |
Resole type cardanol formaldehyde resin solution in slcohol are used as adhesives for laminates |
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All types of bondings |
Alkemine condensates of cardanol are powerful adhesives used in metal to metal bonding |
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Insulating Varnish |
Cardanol used as diluents in bis-phenol based epoxy resin provides extremely good insulating properties. |
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Putty and electrical |
Polyurethane resins of cardanol are used in sealants encapsulating puttys. |
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Surface active agents (Emulsifiers, dispersants and wetting agents) |
Ethoxylated cardanol and sulfonated ethers of cardanol are used as oil in water emulsifiers in pesticides and as wetting agent in textile industries. |
Packing of Cardanol
Cardanol has a tendency to oxidise and acquire colour on exposure to light and air. Depending upon the time of storage of cardanol , one can either go for MS drums or GI drums. Cardanol retains its natural colour best in GI drums. Drums usually hold 190/195 kgs net weight of cardanol only.
Bulk consumers can however prefer ISO tanks , Flexi tanks , Tanker trucks etc.
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