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Cashew nut shell liquid contains Phenolic group called ANACARDNIC ACID. CNSL oil is distilled and Cardphenol is separated. Cardphenol is polymerized and modified with Alkyds, Styrene monomer and Rosin to make Card phenol resin. Silex 85 is Cardphenol based Phenolic Resins modified with Rosin. They are Golden Reddish yellow resins and are suitable for manufacturing Synthetic Hard Gloss Semi Darker & Darker Enamel Paints, Insulating Varnishes, Printing Inks, Aluminum Medium having outstanding Film Properties. They can be blended with any conventional alkyds and can be used for making Lighter color shades also.

Compatibility: These resins are compatible with all drying oils in all proportions like Linseed Oil, DCO, Soya etc., Their compatibility with other resins like Alkyds, Epoxies is also very good.

Solubility: Silex 85 are soluble in most of the Aromatic & Aliphatic hydrocarbon solvents like Mineral Turpentine Oil (MTO), Xylene, Toluene, Solvent Naphtha etc., They are supplied in 80%, 70% & 50% solid contents.

Film Characteristics: The film characteristics have been studied making the resin to 30% solids in Mineral Turpentine, Driers added are 1.0% Lead, 0.5% Cobalt & 1.0% Manganese as metals in their Octoate and the varnish is left for 24 hours for ageing, properties as per IS specifications 197-1972. These resins have very good film forming property, gloss, hardness and water resistance. These properties are beneficial to paint manufacturers as CNSL resin is economical. However pure Cardphenol resin can be incorporated in regular paint formulation to reduce cost and adjust quality.

Applications: Red oxide metal primer made with Cardphenol resin does outstanding performance and corrosion protection. In cheap quality interior enamels Cardphenol resin is added to reduce cost of formulation and also improve gloss. Generally the pigments are ground in long oil alkyd and Cardphenol resin is added in dilution and thinning. Incorporating Long oil alkyd in Cardphenol formulation improves flexibility and durability. Card phenol resin has better properties so it is recommended for use in finishing interior enamels. Cardphenol resin based formulations tend to yellow when exposed to sunlight and the shade of the paint darkens. Card phenol resin base formulations are not recommended for exterior finishes.

Storage: The storage stability of SILEX 85 Resins are satisfactory at least upto one year if stored in tight containers in a cool place.

Film Characteristics: The film characteristics have been studied by making the resin to 30% solid in mineral turpentine, driers added are 1.0% lead, 0.5% cobalt and 1.0% manganese as metal in their Octoate and the varnish is left for 24 hours for ageing, properties as per IS: specification 197-1972.

application : Baking/Air drying hard Gloss Synthetic enamels, Cycle, Stoving Enemels, Printing Inks, Chemical Resistant Paints and Insulating Varnishes


Code No Description and Appearacne Solid Content Viscocity @ 50% Solids B-4 Cup (Seconds) Hard Dry With Driers (30% Solution) in MTO /in Air (Hrs.) Hard Dry With Driers (30% Solution) in MTO / at 120° C (Mts.) Scratch Hardness Air Dried(Gms.) Resistance To Water & Chemicals Max Acid Value
Silex 85 Rosin Modified Carphenol Golden Yellow Viscous Resin 80 (±) 2% 80 to 120 3 15 1100 Good 10
70 (±) 2% 120 to 160 2.5 15
50 (±) 2% 160 to 200 2.5 15 1100 excellent 7


All the above materials should be stored at room temperature and should not be expossed to air. the container should be always kept airtight. the information contained herein