| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 693984 | Progress in Organic Coatings | 2008 | 8 Pages |
The influence of neutralizing agents was investigated using strong and weak acids with three different amines. Acidic acrylic latexes were synthesized through free radical emulsion copolymerization of butyl acrylate, methyl methacrylate and methacrylic acid or 2-sulfoethyl methacrylate. Both strong (sulfonic) and weak (carboxylic) acids were neutralized with three amines, N,N-dimethyl-methylamine, N,N-dimethyl-1-butanamine and N-methyl-morpholine. Uncrosslinked neutralized and un-neutralized latex samples were monitored for water loss (drying parameters), pH development and amine evolution during drying. Surface morphology was monitored during the later stages of film coalescence. For the weak acid, amine volatility was the controlling factor for film formation kinetics, and pH reduction. For the strong acid, volatility of the amine was not a factor. The process of deblocking was governed by the acid–base equilibrium.
