can be calculated using a formula proposed by DAVIES
[20]: HLB=7+1.3n(O)+1.9n(OH)−0.475n(CxHy), where
n(O) and n(OH) are the numbers of hydrophilic oxygen
and hydroxyl functional groups, and n(CxHy) stands
for the numbers of hydrophobic (lipophilic) —CH,
—CH2—, —CH3—, and =CH— groups