Emulsion polymerization of an epoxy‐acrylate emulsion stabilized with polyacrylate. i. influence of salt, initiator, neutralizing amine, and stirring speed

Abstract

ABSTRACT:The past decade has seen the development of high-performance epoxyacrylate coatings. Some of these coatings are used exclusively as can coatings. To improve chemical resistance, emulsion polymerization in the presence of the dispersed epoxy resin can be conducted. Replicated factorial designs were designed to investigate some of the factors that contribute to the performance and stability of the epoxyacrylate coating. The factors investigated in this study were: the type and amount of neutralizing amine, the type of initiator, the presence or absence of salt, and the stirring speed of the impeller. The measured responses for the experimental design were particle size, particle size distribution, and conversion. It has been shown in this study that the type of amine used to neutralize the polyacrylic stabilizer significantly influenced the observed responses probably by acting as chain transfer agent during polymerization. The addition of salt significantly affected the observed responses by shielding the surface charges on the particle surface that impart stability to the latex through electrostatic repulsion. Stirring speed of the impeller and the type of initiator as factors in the range investigated do not influence the kinetics or the particle size and polydispersity to any great extent either on their own or in combination with other factors.

Synthesis and characterization of epoxy‐acrylate composite latex

“…However, in order to make them tractable, it is necessary to dilute the resins with organic solvents. Since the 1960s a substantial research effort has been made into the development of water‐based epoxy systems because of the pressure to reduce volatile organic compounds, and some interesting methods have been proposed 1–4. One method is to produce water‐based epoxy‐acrylate copolymers via grafting polymerization 5–7…”

Polymer heterogeneity in waterborne coatings

“…Another class of hybrids are epoxy acrylics, [93][94][95] which delivers a low VOC system, which is of particular interest for primer applications on metal, architectural coatings, and as coating on concrete. Good adhesion, chemical, and humidity resistances have been reported.…”

Preparation, properties, and applications of acrylic–polyurethane hybrid emulsions in extinction electrophoresis

“…[11][12][13][14][15][16][17][18] However, there are few reports concerning the surface gloss of the PUA films. [11][12][13][14][15][16][17][18] However, there are few reports concerning the surface gloss of the PUA films.…”

“…So far, most studies have focused on latex particles and morphology of the PUA hybrids and their applications in binders for paints, pressure-sensitive adhesives and special coating materials. [11][12][13][14][15][16][17][18] However, there are few reports concerning the surface gloss of the PUA films. Amalvy et al described the production of glossy topcoat one-pot exterior paint formulations using water-based PU/AC hybrid binders.…”