Hectorite and bentonite effect on water-based polymer coating rheology

Abstract

Increased interest in aesthetic, natural nail coatings has encouraged more in-depth studies, and particularly of ultraviolet curable coatings, their formation, processing, characteristics, and removal. This study investigated the impact of various thixotropic agents (organically modified hectorite and bentonite clays) on water-based oligomer system rheology. Ingredients were evaluated to determine their influence on unreacted composite characteristics (viscosity and pigment suspension stability) and reacted film characteristics (modulus of elasticity, elongation at break, and film adhesion force). It is concluded that clay-based thixotropic agents are suitable for use as a suspension agent in nail polish formulations and, depending on the concentration, can decrease the risk of pigment sedimentation and syneresis.

In situ preparation of compounds using silanized mPEG inspired by talc-like structures

“…Fine mineral particles, in particular silicates, are mostly used to influence polymer thixotropic properties such as in paints and coatings. 6 Since the first success of polymer-clay nanocomposites in 1993, the ultimate goal in the preparation of such composites is to achieve a homogeneous dispersion of single separate clay mineral layers in a polymer matrix, called "exfoliation". Several strategies have been developed focusing on the processing methods to obtain composite materials through in situ exfoliation, solution exfoliation, or melt exfoliation.…”

Effect of organoclay and wood fiber inclusion on the mechanical properties and thermal conductivity of cement-based mortars

“…The industrial application of OC has been recognized in the literature due to the excellent performance that engendered on the physical properties of the elaborated composites [3,11,13,20]. Several obstacles are encountered which limit the application of natural fiber in cement composites [15].…”

Evaluation of Adhesion of Polymer Composite Coatings

“…Inherent to this technology is the use of the photoactivator system that is capable of absorbing the UV radiation to convert monomers/oligomers into crosslinked networks [1]. Main components of the system are: a photoinitiator to initiate the polymerization process; oligomer which determines the main characteristics of coating; monomer which controls the viscosity of not yet polymerized systems; additives (such as pigments) which give the coating an esthetical view; microbeads which meet the specific needs of the coating [2][3][4][5][6].…”

“…Thin film coatings on fingernails and toenails are used for aesthetic reasons [2], as drug delivery systems [7][8][9] or to strengthen fragile nails [2,3]. Coating adhesion and disintegration is one of the most important characteristics of short-term coatings [3,4].…”

“…All previous industry studies have been conducted mainly to obtain long-lasting coatings. This application requires specific requirements -both good adhesion during use (2-4 weeks) and rapid disintegration and loss of adhesion in solvent media (3-5 minutes) after wear [3,6].…”