Anti-Tarnishing lacquer for Silver and Copper-based Alloys
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1. |
Title of Product/Design/Equipment. |
Anti-Tarnishing lacquer for Silver and Copper-based Alloys |
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2. |
IPR Status Patent/Abroad IPR Details |
Patent Application No: 3445DEL2012
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3. |
Application/Uses |
Paint/Coating |
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4. |
Salient Technical Feature including Competing Feature |
Anti-tarnishing lacquer developed at CSIR-NML is a one component fast drying interior lacquer for use on brass, copper, bronze and silver surfaces. It prevents tarnishing (blackening) and provides a durable finish resistant to water, acid and alkali environments. The formula contains active corrosion inhibitors chemically bonded to acrylic polymer backbone, hence prevents tarnishing of copper, brass, bronze and items for long durations of several years. This one component acrylic resin lacquer is nontoxic (Lead and Cadmium free) when dry. The lacquer can be applied by spraying, brushing, or dipping and takes 10 minutes to dry. Post treatment like baking not required. The coating passes 500 hours of salt spray test (ASTM B 117) and 72 hours of flower of sulfur test (ASTM B 809). Appearance: Transparent; Gloss @20°: 65-70; Film Thickness: 2-5; micron Coverage: 15-20 m2/litre; VOC: 750-800 g/L; Acid resistance: Pass; Alkali resistance: Pass; Salt Spray Test: 500 hrs |
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5. |
Level/Scale of Development |
500 litres/batch |
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6. |
Environmental Consideration |
The product contains organic solvents/VOC. Use in ventilated areas. No liquid waste or gas emission during lacquer production. |
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7. |
Status of Commercialization |
Product Commercialized by M/S. Mahashraya Chemicals (P) Ltd. , Balasore. Odisha M/S. Multicoat Surfaces (P) Ltd., Kolkata |
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8. |
Major Raw Material to be Utilized |
Commercial grade chemicals like Acrylic monomers, substituted triazoles, Toluene, Acetone, Dicydohexylcarbodiimide (DCC). |
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9. |
Major Raw Plant Equipment and Machinery Required |
Reflux unit. Stirring unit, Filtering unit |
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10. |
Techno-Economics |
Capital cost: Rs. 10 Lakh Unit price: Rs. 400/litre |
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11. |
Technology Package |
Process-Know-how, (b) Details of equipment, (c) Plant Layout & (d) Quality Assurance Methods. Assistance in setting up the plant on separate terms. |
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