TECHNICAL SEMINAR ON PAINT Classification of paint, its properties and general raw materials used in manufacture of paints. Classification of paint, its properties and general raw materials used in manufacture of paints.on Tuesday, 25th of February 2008 R.V College of Engineering R.V College of Engineering BANGALORE. BANGALORE.

Corrosion The US Federal Highway Administration released a study, entitled Corrosion Costs and Preventive Strategies in the United States, in 2002 on the direct costs associated with metallic corrosion in nearly every U.S. industry sector. The study showed that for 1998 the total annual estimated direct cost of corrosion in the U.S. was approximately $276 billion (approximately 3.1% of the US gross domestic product). FHWA Report Number:FHWA-RD The NACE International website has a summary slideshow of the report findings. Jones1 writes that electrochemical corrosion causes between $8 billion and $128 billion in economic damage per year in the United States alone, degrading structures, machines, and containers. Federal Highway Administrationgross domestic productNACE InternationalwebsitesummaryFederal Highway Administrationgross domestic productNACE Internationalwebsitesummary

Methods of corrosion prevention: Anodic Protection. Anodic Protection. Cathodic Protection. Cathodic Protection. Surface Coating. Surface Coating.

WHAT IS PAINT? Paint is a stable fluid suspension of finely divided pigment particles. Paint is a stable fluid suspension of finely divided pigment particles. Paint is a mixture of finely dispersed pigment in resin media which, when applied on a substrate it forms a hard film, which is both protective & decorative in nature. Paint is a mixture of finely dispersed pigment in resin media which, when applied on a substrate it forms a hard film, which is both protective & decorative in nature.

Properties Of Paint When paint is applied to the surface of a metal, wooden article or building, it not only gives decorative and aesthetic look but also protects the material from weathering, corrosion, etc. When paint is applied to the surface of a metal, wooden article or building, it not only gives decorative and aesthetic look but also protects the material from weathering, corrosion, etc. It also prevents the surface from Algae or fungal attacks. It also prevents the surface from Algae or fungal attacks.

Classification of Paints Water soluble paints (generally used in construction sector). Water soluble paints (generally used in construction sector). Solvent soluble paints (generally used on metallic surface) Solvent soluble paints (generally used on metallic surface) Solvent free paint (used exclusively for metallic surface also called as Powder Paint) Solvent free paint (used exclusively for metallic surface also called as Powder Paint)

Water-soluble Paints Water-soluble paints are mixed with water for application viscosity. Water used as solvent, is eco-friendly and the surface dries fast to go for second coat application. Water-soluble paints are mixed with water for application viscosity. Water used as solvent, is eco-friendly and the surface dries fast to go for second coat application. I) Cement Paint (For Exterior Purpose). I) Cement Paint (For Exterior Purpose). II) Distemper (For Interior Wall Finish). II) Distemper (For Interior Wall Finish). III) Emulsion Paint (Interior Wall Finish). III) Emulsion Paint (Interior Wall Finish). IV) High performance water soluble metal paints are available, which are costlier and not popular in the local market. IV) High performance water soluble metal paints are available, which are costlier and not popular in the local market.

Solvent-Soluble Paints Solvent-based paints are thin able in solvents, selection of solvent-based paints are based on requirements. Solvent-based paints are thin able in solvents, selection of solvent-based paints are based on requirements. Solvent-based paints are classified as follows: Solvent-based paints are classified as follows: I) Alkyd Resin based paints I) Alkyd Resin based paints II) Acrylic Resin based PU paints II) Acrylic Resin based PU paints III) Polyester Resin based Paints III) Polyester Resin based Paints IV) Epoxy Resin based Paints IV) Epoxy Resin based Paints V) Special paints based on modified resins V) Special paints based on modified resins VI)Thermosetting paints VI)Thermosetting paints

RAW MATERIALS USED IN THE MANUFACTURE OF PAINTS RESIN: RESIN: SOLVENTS: SOLVENTS: PIGMENTS: PIGMENTS: EXTENDERS: EXTENDERS: ADDITIVES: ADDITIVES: DRIERS: DRIERS:

RESIN / BINDER : Resins are organic compounds made by Polymerization of oils (both vegetable & petroleum products). Resins are organic compounds made by Polymerization of oils (both vegetable & petroleum products). Resins are film formers in which micronised pigment particles are evenly dispersed forming a fluid suspension. Resins are film formers in which micronised pigment particles are evenly dispersed forming a fluid suspension. Resins are the Heart of Paint. Resins are the Heart of Paint. They are also called as binders,mediums, vehicles. They are also called as binders,mediums, vehicles.

SOLVENTS A Substance capable of dissolving a solute to form a uniformly dispersed mixture i.e. Solution. A Substance capable of dissolving a solute to form a uniformly dispersed mixture i.e. Solution. Solvents are used in paints for the purpose of flow and leveling. Solvents are used in paints for the purpose of flow and leveling. Eg :Water (in case of water solb paints), organic solvents like xylene,toluene etc. Eg :Water (in case of water solb paints), organic solvents like xylene,toluene etc.

PIGMENTS Colored particles in paints is called as pigments. Colored particles in paints is called as pigments. Pigments are suspended in resin media to give the required coloration. Pigments are suspended in resin media to give the required coloration. Pigments are mainly classified as organic & inorganic pigments. Pigments are mainly classified as organic & inorganic pigments. Eg: Azo pigments, Anthraquinon, Pthalocyanin in case of organic pigments. Eg: Azo pigments, Anthraquinon, Pthalocyanin in case of organic pigments. Titanium Dioxide, Chrome pigments etc in case of inorganic pigments. Titanium Dioxide, Chrome pigments etc in case of inorganic pigments.

EXTENDERS Extenders are optically inert and colorless material used in combination with pigments to increase color effect and thereby reduce the cost of paint production. Extenders are optically inert and colorless material used in combination with pigments to increase color effect and thereby reduce the cost of paint production. Extenders by themselves are transparent material. Extenders by themselves are transparent material. Eg: Calcite, China Clay, Barytese etc. Eg: Calcite, China Clay, Barytese etc.

ADDITIVES Additives are certain chemical agents added in order to enhance certain required properties of paint. Additives are certain chemical agents added in order to enhance certain required properties of paint. They are used in very small quantity but contribute significantly to the property of paint. They are used in very small quantity but contribute significantly to the property of paint. The following classes of additives are commonly used. The following classes of additives are commonly used. 1. Wetting and dispersing agent 1. Wetting and dispersing agent 2. Anti skinning agent 2. Anti skinning agent 3. Anti settling agent 3. Anti settling agent 4. Defoamers 4. Defoamers 5. Flow control and leveling agent 5. Flow control and leveling agent 6. Preservatives and fungicides. etc 6. Preservatives and fungicides. etc

DRIERS Driers are chemical agents which helps in absorbing atmospheric oxygen and oxidizes the paint film as a result of which the film hardens. Driers are chemical agents which helps in absorbing atmospheric oxygen and oxidizes the paint film as a result of which the film hardens. Eg: Napthenic acid, Octoic acid derivatives etc are the driers widely used in paint industry. Eg: Napthenic acid, Octoic acid derivatives etc are the driers widely used in paint industry. Driers are classified as primary and secondary driers. Driers are classified as primary and secondary driers. Eg: Cobalt, lead, manganese (primary driers). Eg: Cobalt, lead, manganese (primary driers). calcium, Barium, Zinc soaps (secondary driers). calcium, Barium, Zinc soaps (secondary driers).

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