Paints

INTRODUCTION

-Paints are mixture of pigments and binders generally available in liquid state.

-The pigments provide the paint with its colour and opacity.

-The pigment powder is broken down into individual particles which are coated by and dispersed in a binder (resin).

PURPOSE OF PAINTING

To protect the surfaces from atmospheric influences and to preserve them from the decay, oxidation and corrosion.

▸ To improve the appearance of surfaces.

To facilitate the cleaning of surfaces.

DIFFERENT TYPES OF PAINTS 

 1. Aluminium paints 

-Aluminum paints are made by mixing finely ground Aluminum with spirit or oil varnishes

-This type of paint is used for painting wood works, metallic surface etc.

 

2. Asbestos paints 

▸ Asbestos paint is a special purpose paint which is made of fibrous asbestos.

 ▸ It is used for covering leakage in metal roofs, for patch works, for protecting surfaces from acid gases and steam.

 

3. Anti-corrosive paints 

-Anti-corrosive paints are used to resist corrosion. 

-This type of paint is widely used for metal surfaces like pipe, external structures which may allowed nature etc.

 4. Bituminous paints 

-Bituminous paints are obtained by dissolving tar or asphalt in petroleum or white spirit

-Bituminous paints are used for metal structures in under water conditions, iron pipes carrying water.

 5. Cement based paints 

▸ These paints contain cement, accelerator, pigment and other additives.

▸ Cement based paint is water proof and can be applied in internal or external surfaces.

 6. Synthetic rubber paints 

•Synthetic rubber paints are made by dissolving synthetic resins in the suitable solvents.

•This type of paint is widely used on cement concrete surfaces like concrete walls etc.

 7. Silicate paints 

•Silicate paint is a mixture of silica and resinous substances.

•This type of paint can be used in hot conditions and for metal structures.

 8. Graphite paints 

•Graphite paint is made of graphite which is in black color.

•It is used for painting underground structures like mines etc.

 9. Plastic paints 

•Plastic paints contain plastic as the base.

•They are used for coating walls, slabs, decks etc.

 10. Casein paints 

•It is available in powder form or paste form.

•Casein paints are used for coating walls, ceilings, wood works etc.

 11. Cellulose paints 

•They are made of celluloid sheets, nitrogen-cotton, amyl acetate and photographic films.

•It is very costly and only used for painting aircrafts, motor cars etc.

 12. Enamel paints 

•The main constituents of enamel paints are metallic oxide, petroleum spirit, oil and resinous matter.

•They are widely used for painting doors, windows, stairs, decks etc.

 13. Emulsion paints 

•Emulsion paints have good alkali resistant properties.

•This type of paint can be used for all masonry works especially for stucco plaster brick works which contains free alkali.

 14. Bronze paints 

•Bronze paints are reflective paints which are widely used on radiators.

 15. Colloidal paints 

•Colloidal paints do not contain any type of inert materials.

•When it is applied on the surface, it settles and penetrates through the body of surface.

 16. Oil paints.

•General base constituents used for making oil paints are white lead, zinc white, lithopone, red lead and titanium oxide.

•This type of paints can be applied for walls, doors, windows, metal structures etc.