Tementina solvent

Classified in Chemistry

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Q5) Material protective coatings



a) Vehicle -



fluid material in which the paint Hardens



• Polymerisation – reaction with the Air film forming – oil paints



• Evaporation of a solvent – volatile & flammable



Pigment -



• Fine insoluble particles which Produce the colouring and main body of the paint



• Primers and undercoats have more Pigments than the finish coats



• Maximum covering capabilities with Minimum thickness



Extenders -



• Control the flow & gloss of the Liquid paint



• Particle size is larger than the pigment



• Reduce the cost & increase area Of cover



b) Cellulose paints -



• Solvent based (cellulose dissolved in Acetone solvent)



• Plasticisers added to enhance Elasticity



• Synthetic resins produce gloss finish



• Flammable



Powder epoxy coatings -



• These are relatively new and Are shop applied by electrostatic methods



• Excess materials can be Recovered and re-used



• Uniform coating hardened by Baking



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