KevinMayer-Summary

Summary:
 * Drive to move to renewable resources has motivated the use of vegetable oil derived alkyd polyester resins to replace dependence on fossil hydrocarbon resources.
 * Commonly, alkyd resins used for home application cure using the oxidative curing process in which free radical formation plays a major roll.
 * Different forms of catalysts exist for the oxidative curing process. Heat and the presence of oxygen are typically required.
 * Alkyd resins are cheap and flexible to use. Formulation and application are simpler. Linseed oil will be tested for use in forming some alkyd resins by varying monomer concentration. Various spectroscopic methods will be used to analyze the products. The film formed by the coating will be tested for various properties.
 * A white, solvent based, alkyd will be formulated from the ground up to test the effect of linseed oil as the fatty acid.
 * The production of the polyester is done in steps to ensure proper distribution of fatty acids in order to obtain a target oil length alkyd resin. Use of FTIR and NMR shows expected results in par with other oil based alkyds.
 * The completed alkyd resin was combined with the components for an alkyd paint in solvent. The results of the FTIR confirm the formation of ester. The viscosities of the product were in range of normal units.
 * The dry time that was observed increased with oil concentration. This is possible due to the degree of polymerization. The degree of polymerization and the presence of different additives impart changes to the film hardness and flexibility.
 * The produced films exhibited good resistance to solvent penetration. Overall the presence of Aerosil R972 improved the film properties over the formulations without it.
 * Linseed oil alkyds perform to the accepted levels and these performance levels can be enhanced with addition of formulation additives. The use of linseed oil enables formulations based on renewable resource feedstocks.

D. Iseri-Caglar, E. Basturk, B. Oktay, M. Vezir Kahraman. “Preparation and evaluation of linseed oil based alkyd paints.” Progress in Organic Coatings 77 (2014): 81-86 DOI