Alkyd resin processing fusion process

Fusion process - [ALKYD RESINS] (Vol 2) - [ALKYD RESINS] (Vol 2) -for glasses [GLASS] (Vol 12) -metal soap mfg [DRIERS AND METALLIC SOAPS] (Vol 8)... 

The manufacture of alkyd resins usually involves alcoholysis of the oils with a polyhydric alcohol followed by a batch process in which the first step is the esterification to a specified end point and then solution into a solvent thinning tank. The esterification may be done in the absence (fusion process) or presence (solvent process) of solvent, but in both cases an inert gas (nitrogen or carbon dioxide) must be bubbled through the reaction mixture to facilitate removal of water of esterification and to minimize oxidation. 

A typical fusion process formation for a medium oil alkyd resin is as follows [46]. 

Alkyds are actually a type of polyester resin and are produced by direct fusion of glycerol, phthahc anhydride, and drying oU at 410°F-450°F (210°C-232°C). The process involves an esterification reaction of the alcohol and the anhydride and transesterification of the drying oil. A common mode of operation today is thus to start with the free fatty acids from the drying oil rather than with the triglycerides. 

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