Select ALL the statements that are correct regarding solvents in various paint f
ID: 906921 • Letter: S
Question
Select ALL the statements that are correct regarding solvents in various paint formulations (You must select ALL the correct statements and NOT select any incorrect ones to receive credit). Say you have a formulation that uses two solvents, water (H20) and isopropanol (CH3CH(OH)CH3), then increasing the proportion of water (H20) should shorten (speed-up) the drying time of the paint formulation. If you wish to dissolve an inorganic pigment (a salt) into an oil vehicle such as linseed oil, hexane (CH3CH2CH2CH2CH2CH3) would be better solvent than ethanol (CH3CH2OH) Remember that solid vehicles must be completely dissolved in a solvent. If a formulation uses polyvinyl alcohol (PVA) as the vehicle, water (H2O) would be a far better choice than hexane (CH3C2CH2CH2CH2CH3) as the solvent to completely dissolve the PVA. Say you want a thick, viscous paint formulation based on sodium polyacrylate. Surely water (H2O) would be your main solvent, but you wish to increase the viscosity and drying time further by adding another solvent. Adding glycerol CH2(OH)CH(OH)CH2OH) would help, while acetone (CH3COCH3) should have the opposite effect.Explanation / Answer
3rd and 4th are correct