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Coating Formulations (coating + formulations)
Selected AbstractsGloss Stability of Whey-Protein/Plasticizer Coating Formulations on Chocolate SurfaceJOURNAL OF FOOD SCIENCE, Issue 3 2002S.-Y. Lee ABSTRACT: : Four different whey-protein-isolate (WPI)/plasticizer formulations were compared to determine which provided the most gloss and which was most stable with time when applied on chocolates. The 4 plasticizers studied were glycerol, polyethylene glycol 400 (PEG 400), propylene glycol (PG), and sucrose, all in a 1:1 ratio with WPI. Gloss stability was determined by measuring gloss fade over time using the Tricor Gloss Analysis System. WPI/sucrose coatings provided the highest and most stable gloss. With optimization, water-based WPI/sucrose coatings could be an alternative source of glaze to alcohol-based shellac coatings in the confectionery industry. [source] Characterization of the interactions between polymethacrylate-based aqueous polymeric dispersions and aluminum lakesJOURNAL OF PHARMACEUTICAL SCIENCES, Issue 12 2001Nasser Nyamweya Abstract Instability in film coating formulations can arise from interactions between aluminum lake pigments and aqueous polymeric dispersions. The purpose of this study was to characterize the interactions between three polymethacrylate-based aqueous polymeric dispersions (Eudragit® RS 30 D, Eudragit® L 30 D-55, and Eudragit® NE 30 D) and aluminum lakes. Particle size measurements, pH stability profiles, zeta potential measurements, and microscopy were used to study mixed dispersions of the polymeric latices and the lakes. Interactions leading to dispersion instability were related to the surface charge of the components in the formulation. Interactions between the ionic polymers and the lakes arose from instability of the lakes outside a certain pH range resulting in the release of electrolytes, which led to aggregation of the polymeric particles. Interactions between the nonionic polymer and the lakes were related to the polymer modifying the surface charge of the lakes, resulting in aggregation of the pigment particles. © 2001 Wiley-Liss, Inc. and the American Pharmaceutical Association J Pharm Sci 90:1937,1947, 2001 [source] Whey protein isolate coating on LDPE film as a novel oxygen barrier in the composite structurePACKAGING TECHNOLOGY AND SCIENCE, Issue 1 2004Seok-In Hong Abstract To examine the feasibility of whey protein isolate (WPI) coating as an alternative oxygen barrier for food packaging, heat-denatured aqueous solutions of WPI with various levels of glycerol as a plasticizer were applied on corona-discharge-treated low-density polyethylene (LDPE) films. The resulting WPI-coated LDPE films showed good appearance, flexibility and adhesion between the coating and the base film, when an appropriate amount of plasticizer was added to the coating formulations. WPI-coated LDPE films showed significant decrease in oxygen permeability (OP) at low to intermediate relative humidity, with an Arrhenius behaviour and an activation energy of 50.26,kJ/mol. The OP of the coated films increased significantly with increasing relative humidity, showing an exponential function. Although the coated films showed a tendency to have less oxygen barrier and more glossy surfaces with increasing plasticizer content, differences in the OP and gloss values were not significant. Haze index and colour of the coated films were also little influenced by WPI coating and plasticizer content. The results suggest that whey protein isolate coating could work successfully as an oxygen barrier and have potential for replacing synthetic plastic oxygen-barrier layers in many laminated food packaging structures. Copyright © 2004 John Wiley & Sons, Ltd. [source] Synthesis and characterization of urethane vinyl ether crystalline monomersPOLYMER INTERNATIONAL, Issue 3 2006Zhaohua Zeng Abstract UV powder coatings combine the advantages of both conventional thermoset powder coatings and liquid UV-curing coatings. In this paper, a series of crystalline monomers based on urethane vinyl ether have been synthesized by reaction of hexamethylene diisocyanate (HDI) with hydroxybutyl vinyl ether (HBVE) or together with a saturated alcohol such as 1-octanol, 2-butoxy ethanol and 2-ethoxy ethanol. The crystallinity of the monomers was characterized by DSC, WAXD and polarizing microscopy. It was found that the melting point of the monomer can be expediently adjusted to an adequately low level by changing the type and/or the amount of the saturated alcohol added during the synthesis procedure. Thus, when 20,40 mol% of HBVE was replaced by a saturated alcohol, the melting point decreased to around 75,90 °C, which is suitable for UV-curing powder coating formulations. Copyright © 2006 Society of Chemical Industry [source] | ||||||||||