For a specific paint application, a mixture of solvents is needed. The mixture will be identified by

Question:

For a specific paint application, a mixture of solvents is needed. The mixture will be identified by its ability to mix with water (total miscibility), its normal boiling point (determines the solvent evaporation rate), its solubility parameter (determines whether paint is soluble in it), and its molecular weight (size of the candidate molecule).

For mixture properties, use the ideal mixing rule [Eq. (4.16)]. For the property ranges:

\[\begin{aligned}& 41

with target values in parentheses, find:

(a) at least one binary mixture that satisfy the target.

(b) the minimum cost binary (solvent) mixture.

The cost function is defined as

\[F=\Sigma x_{i} C ho_{i}\]

where \(C\) is a cost factor (in 1,000 cost-units) and \(ho_{i}\) is the density of compound \(i\).

Data From Eq. 4.16:-