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Home Construction Basics Paint and its Properties
Home Construction Basics Paint and its Properties
| Paint and its Properties |
| Saturday, 12 April 2008 09:34 | |||
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Almost everybody knows the word paint, it uses, color including the brand which are rated as poor, good and durable. There are those who have little knowledge of paint but rated a brand based on how it is advertised. Others on the cost of the paint. Generally, a good quality paint is a little bit costlier than that of a poorer one. However, in terms of surface area coverage, ease of work and durability, a good quality paint is cheaper than that of a poorer one. Thus, never have a second thought of having the best from a reputable brand, otherwise, to think of saving a few cents for your paint might turn out later to be more expensive. Obtaining a good quality paint from a reputable brand however, is not a guarantee that you have a long lasting paint. There are numerous kinds of paint as there are various kinds of surface to be painted. Applying a premium quality paint to a surface not suitable for such type of paint is considered a technical failure which cannot be guaranteed by the cost neither the brand of the part. It is therefore imperative to know which kind of paint for what kind of surface to be applied with. Ingredients of PaintPaint has the following ingredients:1. Vehicle 2. Solvent 3. Pigment 4. Additives VehicleVehicle is that substance in the paint which gives a film continuity and provides adhesion to the surface or substrate. It is called vehicle because it carries the ingredients to the substrate which will remain on the surface after the paint has dried.The Vehicle contains a film former which is the combination of the following: a. Resins b. Plasticizers c. Drying oil, etc The Vehicle is divided into the following components: 1. Solid Thermoplastic Film Formers - the solid resin is melted for application and then solidifies after application. 2. Lacquer Type Film Former - the vehicle dries by solvent evaporation. 3. Room Temperature Catalyzed Film Formers - a chemical agent blended into the coating before application cause cross-linking into a solid polymer at room temperature. 4. Heat-Cured Film Formers - heat causes cross-linking of the film former or activates a catalyst that is not active until heat has been applied. 5. Oxidizing Film Formers - oxygen from the air enters the film and cross-link it to form a solid gel. 6. Emulsion type Film Formers - the solvent evaporation and the droplets of plastic film former floating in it to flows together to form a film. SolventSolvent are low viscosity volatile liquid used in coating improve application properties.PigmentPigment are solid grains or particles of uniform and controlled sizes which are generally insoluble in the vehicle of the coating.The Paint Pigment contributes to the following properties: a. For the decoration of function - it contributes opacity, color and gloss control. b. For the protection - it contribute specific properties such as hardness, resistance to corrosion and rapid weathering, abrasion and improved adhesion. c. It makes sanding easier, retard flame and serves as insulation against electricity. d. Pigments serve to fill spaces in paint films. AdditivesAdditives are ingredients formulated in the paint to modify the properties of either the vehicle or the pigmentation or both. They give the wet paint or dried paint film properties which are not present in the vehicle and pigmentation system. Additives improve a certain properties of vehicle such as speed drying, pigment resistance to fading or the entire paint such as the ease of application.
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