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Corresponding Author

Omar M. Shafey

Authors ORCID

https://orcid.org/0009-0004-4006-0427

Document Type

Original Article

Subject Areas

Chemistry

Keywords

polymer; Alkyd; Vinyl acetate copolymer; emulsion polymer; Alkyd emulsion; Waterbased coating.

Abstract

Alkyd emulsion is one of the solutions to the problem of the legal limit value for volatile organic content (VOC). In the present work, we discuss the synthesis of different grafted alkyd-vinyl acetate copolymers using the emulsion polymerization technique. The prepared polymers were characterized in terms of particle size, FT-IR, differential scanning calorimetry (DSC), and gel permeation chromatography (GPC). The synthesized polymers showed enhancements in nanometric properties (70 nm) as compared with commercial vinyl acetate copolymer resins. The spectra of the blank resins and hybrid resins showed some spectral differences, as shown by FT-IR spectroscopy. The DSC test revealed that the hybrid resin's glass-transition temperatures are lower than those of that based on vinyl acetate copolymer, and the GPC results showed that the average molecular weight (M.wt) of hybrid resin is higher than both vinyl acetate copolymer and alkyd resins, further confirming the chemical formation of hybrid resin. The characterized copolymers were evaluated as binders in water-based coating formulations and showed an increase in wet scrub to 2930 cycles for the hybrid resin, compared to the vinyl acetate copolymer resin of 1600 cycles. These improvements may be one of the most promising opportunities to replace solvent-based alkyd with alkyd-vinyl acetate emulsion in waterborne coating.

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