Development of PU Coatings from Neem Oil Based Alkyds Prepared by the Monoglyceride Route. (24th April 2015)

• Record Type: Journal Article
• Authors: Chaudhari, Ashok; Kulkarni, Ravindra; Mahulikar, Pramod; Sohn, Daewon; Gite, Vikas
• Is Part Of: Journal of the American Oil Chemists' Society. Volume 92:Number 5(2015)
• Page Start: 733
• Page End: 741
• Publication Date: 2015-04-24
• Subjects: Neem oil -- Alkyds -- Polyurethane -- Coatings -- Renewable sources; Oils and fats -- Periodicals; Soap -- Periodicals; Fats -- Periodicals; Food-Processing Industry -- Periodicals; Acides gras -- Périodiques; Aliments -- Industrie et commerce -- Périodiques; Huiles et graisses -- Périodiques; Savon -- Périodiques; Oliën; Chemie; Oils and fats; Soap; Periodicals; 547.77
• DOI: 10.1007/s11746-015-2642-3
• Languages: English
• ISSNs: 0003-021X

Abstract

Abstract: This work deals with the preparation of alkyd resins from neem oil and their utilization in preparation of polyurethane coatings. Alkyd resins were synthesized by reaction of neem oil monoglycerides with four different divalent acids like phthalic anhydride, maleic anhydride, itaconic acid, and dimer fatty acid. The alkyds formation was studied by determining the acid number of the reaction mixture at regular intervals of time and the extents of the polyesterification reactions were calculated during the formation of alkyds. The structures of synthesized alkyds were confirmed by FT‐IR and 1 H‐NMR spectroscopic analysis and also by end group analysis such as hydroxyl and acid values. The synthesized alkyds were reacted with TDI to prepare PU coatings and their performance was compared with PU coatings prepared from a commercial alkyd.