Auxiliaries emulsion paints

Emulsion paints consist of polymer dispersions as binders, pigments, extenders, and small amounts of auxiliaries (in some cases < 1 %). Waterborne polymer dispersions are produced by emulsion polymerization monomer droplets are polymerized in water-containing surfactants and protective colloids. The size and size distribution of the dispersed polymer particles can be controlled by adjusting the stirring rate in the polymerization reactor and by selecting appropriate protective colloids. 

Auxiliaries. Dispersants ensure that the individual particles in the emulsion paint do not combine to form agglomerates. Protective colloids and emulsifiers are used during emulsion polymerization to ensure that small polymer spheres are formed in the aqueous phase but do not fuse together. They influence film formation of the emulsion paint and can cause foaming. Protective colloids include polyfvinyl alcohols) and cellulose ethers. Emulsifiers include anionic and nonionic surfactants. 

During the production and transportation of emulsion paints the dispersants and emulsifiers cause foaming which leads to the undesirable formation of craters and pores in the coating film. Defoamers reduce the surface tension of the liquid to such an extent that the air bubbles in the foam collapse. They include silicone oils, waxes, fatty acids, if necessary on a solid carrier, e.g., on silicates. The defoamers are formulated in an auxiliary liquid (e.g., mineral oil, silicone oil, or glycol). 

Application. Emulsion paints can be applied by brush, roller, dipping, inundation, and spraying. A wide range of qualities of emulsion paints with tailor-made properties can be produced from the available binders, thickeners, and auxiliaries. 

Auxiliary solvents and film-forming auxiliaries are also used as flow promoting agents in aqueous dispersions (emulsion paints). Propylene glycol acts not only as a solvent, but is hygroscopic and thus ensures a sufficiently high water content in the coating until a smooth surface has formed. 

Synonyms Vinyl acetate-ethylene-vinyl chloride copolymer Vinyl chlo-ride/ethylene vinyl acetate copolymer Uses Binder, vehicle for emulsion paints, paper coatings, textured finishes, fabric coatings, flame retardant fabrics, constmction adhesives, and thermal insulation systems adhesive for flooring, walls, foam, tiles, paper/paperboard binder for fabrics, glass fiber textile auxiliary and coating paper coatings... 

Reaction of hydroxylamine with ketones or aldehydes yields oximes, aldoximes RHC=NOH, or ketoximes R2C=NOH. Almost all the hydroxylamine production (95%) is used for the production of either cyclohexanone oxime or caprolactam, both of which are intermediates for polyamide synthetics. The remainder of the hydroxylamine production is used as an anticreaming agent in paints and coatings, as an auxiliary in refining fats for soap production, as a regulator or inhibitor for various polymerizations, as a stabilizer for developers, and as an additive for color emulsions. Oximes are also used as pharmaceuticals or in crop protection. 

Chem. Descrip. Oxidized polyethylene wax CAS 68441-17-8 EINECS/ELINCS 200-815-3 Uses Lubricant for PVC, PS melting agent, water repellent for paints processing aid for polyester textile and paper auxiliary abrasion-resist, printing ink emulsions dry-bright/mixed saponified emulsion polish/pre-servative agent... 

Uses Surfactant for cleaning products, textile auxiliaries, paints, and asphalt emulsions... 

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