Preparation of Acid Functional Acrylic Resin

In this example butyl glycol is mixed with butanol. Depending upon the ratios, the reflux temperature will be mo fied. Chain transfer agent tertiary dodecyl mercaptan is present to control molecular weight. The initiator is added separately being slurried with solvent. 

The hard monomers styrene and methyl methacrylate are used. Styrene is lower cost than methyl methacrylate and as much as possible is used to reduce costs. Methyl methacrylate confers certain advantages to the film, depending upon end application, thus it carmot be totally replaced. 

Charge the reactor with butyl glycoP and butanoP and heat to 130°C. 

Commence the addition of the premixed monomers at a constant rate over 3 hrs. at 130°C. 

Add 90% of the initiator charge simultaneously over the same period of time. Note that if required butano can be replaced by butyl glycot K 

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