Flexible Polyurethane Foams from Epoxidized Vegetable Oils and a Bio-Based Diisocyanate.

ABSTRACT: Bio-polyols from epoxidized soybean and linseed oils and caprylic acid or 3-phenyl butyric acid were prepared using an environmentally friendly, solvent-free method evaluating the presence of triethylamine as catalyst. Side reactions, leading to a cross-linking structure with high density, were reduced, introducing the catalyst and properly tuning the reaction conditions. A medium functionality value of around 3 along with a hydroxyl number up to around 90 mg KOH/g, narrow polydispersity index, and relatively low molecular mass up to 2400 g/mol were the experimental targets. From selected bio-polyols and an aliphatic partially bio-based isocyanate, a series of water blown polyurethane (PU) foams was produced, estimating the effect of the chemical nature of substituents in the polyol backbo

SUBMITTER: Cifarelli A 

PROVIDER: S-EPMC7922077 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature