Effect of polyalcohols on the anticorrosive behaviour of alkyd coatings prepared with drying oils

[Display omitted] •Sacha inchi oil-based alkyd resins had lighter colours and higher viscosities.•Hardness of the alkyd films was improved by pentaerythritol and Sacha inchi oil.•Pentaerythritol extended drying time and enhanced alkyd film properties.•Sacha inchi oil and pentaerythritol improved adh...

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Bibliographic Details
Published in:Progress in organic coatings 2020-08, Vol.145, p.105671, Article 105671
Main Authors: Hadzich, Antonella, Gross, G. Alexander, Leimbach, Martin, Ispas, Adriana, Bund, Andreas, Flores, Santiago
Format: Article
Language:English
Subjects:
Accelerated tests
Alkyd resin
Alkyd resins
Biofuels
Coatings
Corrosion prevention
Corrosion tests
Drying oils
Industrial wastes
Pentaerythritol
Polymers
Resins
Sacha inchi oil
Sulfur dioxide
Vegetable oils
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Summary:[Display omitted] •Sacha inchi oil-based alkyd resins had lighter colours and higher viscosities.•Hardness of the alkyd films was improved by pentaerythritol and Sacha inchi oil.•Pentaerythritol extended drying time and enhanced alkyd film properties.•Sacha inchi oil and pentaerythritol improved adhesion properties of alkyd primers.•Sacha inchi oil and pentaerythritol enhanced the anticorrosive behaviour of coatings. Alkyd paints contain resins derived from vegetable oils. Alkyd resins have regained their importance since they are mostly composed of bio-based constituents recovered from biofuels production and agro-industrial waste. The anticorrosive performance of medium alkyd paints modified with Sacha inchi and linseed oils, and different ratios of glycerol and pentaerythritol, were compared by accelerated corrosion tests (Salt Fog and Sulphur Dioxide tests). This study focuses on comparing the effect of polyalcohol and oil type on physicochemical properties of resin solutions and cured films, and consequently, on the anticorrosive behaviour of paints prepared with the resins under study. Results showed that the mixture of pentaerythritol and Sacha inchi oil improves alkyd resin properties and enhance the anticorrosive performance of alkyd paints in accelerated weathering tests.
ISSN:0300-9440
1873-331X
DOI:10.1016/j.porgcoat.2020.105671