Sprayable coatings

Eor some appHcations the powder is suspended in an aqueous medium or a solvent with the help of emulsifying agents and then sprayed onto the substrate. The powder is also used as a filler to prepare sprayable compositions of PTEE dispersions, which then can be used to coat various substrates (36). 

Two-part sprayable polyurethanes are used in the production of chemical-resistant paints and coatings. The polyurethanes can be let down in some solvent to ease in the spraying. Polyureas are becoming important in this section of the market because of their very fast cure rates. 

Sulfur is used directly in sulfur-additive solutions which are used as coatings (3, 4, 5, 6). Dicyclopentadiene is a potentially cheap material that can form copolymers with liquid sulfur. The patent literature reports applications of the sulfur-dicyclopentadiene system in sprayable coatings, rubber vulcanizates, etc. However, very little has been written on the chemistry, characterization, and properties of this system. 

The behavior of melt viscosity of sulfur-dicyclopentadiene solutions is of obvious interest from the point of sprayable coatings. The melt viscosity behavior has been reported recently, but only qualitatively and over a narrow range of compositions (18). The viscosity of sulfur measured by the capillary method by Bacon and Fanelli (19, 20) is considered to be the best (21). Recently, however, the viscosity of sulfur has been measured by an apparatus containing an electric motor and a rotating cylinder (22). Viscosity of the sulfur-DCP solutions are measured here with the help of a Brookfield synchro-lectric viscometer, which is of the later kind. Viscosity measurements have been carried out to follow the copolymerization reaction and to analyze the viscosity behavior. 

Accelerated setting time Excess MgO Minutes 6h Sprayable coatings for construction, dental cements... 

Solventless, elastomeric coatings were reported by Bonk et al. (169). The sprayable compositions were based mainly on diethylene glycol adipates, Isonate 143-L, and various diamine chain extenders and curatives. Airless Binks spray guns were employed in the... 

In a thermoplastic acrylic automotive coating, a CAB is used as the pigment dispersion medium and at 15% concentration based on polymer weight provides better sprayability, increased cold crack resistance, better pigment control, better solvent release, and improved exterior durability. (See Table IX.)... 

Other anode systems specially developed are sprayable conductive polymer coatings, metallized zinc coatings, and conductive paints. Typical primary anode for the conductive polymer or paints is platinized niobium wire attached to the concrete prior to application. Estimated cost is 76/m with a service life of five years. 

A new two-part, sprayable ceramic coating designed to protect metal surfaces on industrial equipment from wear, abrasion and corrosion is now available. Packaged in a reusable dualcartridge dispenser, Loctite Nordbak 7255 sprayable ceramic coating can be sprayed onto metal components to create smooth, low-friction surfaces that improve equipment efficiency. 

This is sprayable plastisol which can be used for coating substrates which require noise-damping especially of high-frequency components. 

Features Produces coating with exc. sprayability, good sag resist., exc. 

Chem. Descrip. Calcium sulfonate/carbonate complex in mineral spirits Uses Corrosion inhibitor in aerospace, asphalt, automotive (body and frame, sheet steel), oil field, small parts, storage coatings, tubular steel Features Sprayable provides firm, waxy, tack-free films Properties Brn. color dens. 8.2-8.5 Ib/gal vise. 10,000-25,000 cps flash pt. (PMCC)>105 F 68-73% solids SACI 8100 [Stoney Creek Tech. Sea-Land]... 

Uses Binder, thickener, pigment, foam/filler stabilizer, dispersant, emulsifier, plasticizer, vise, control agent, sedimenting aid, protective colloid in coatings, paints, resins, mining, batteries, insecticidal prods., rubber, textile, leather, ceramics, suspension polymerization, pharmaceuticals adhesion promoter in tile cements water retention aid, thickener in sprayable plasters, mortar, stucco, fillers vise, control agent, stabilizer in cosmetics... 

The sprayability of a coating is determined by its viscosity at application. The viseosity is a measure of the ability of a material to resist flow and is an important formulation design parameter. Application viscosity is affected by the ambient conditions and by the degree of... 

This sprayable system is of use where relatively thick, resilient polyurethane coatings are required and where it is impracticable to apply prepolymer itself This criterion is well illustrated in the covering of a ship s propeller. 

In latter years polyurethane elastomers have tended to be used due to their ability to be processed as liquids examples are the RIM process, sprayable and spreadable non-solvent coatings. Also polyurethane elastomers are now widely used in automobile floor mats of various types where bulk and high density are the primary properties needed to give sound absorption and reduced in cab noise levels such products are... 

Anticorrosive lubricant coating is achieved with a sprayable composition containing a-BN, sodium silicate, and C2CI4 [194]. Coating with a slurry of boron nitride powder in an organic... 

Good sag control and good sprayability of coatings can be maintained with a shear thinning fluid without a yield stress if it has an n value of 0.6. 

A clear, light-coloured, UV stabilised chemical resistant NPG-isophthalic gel coat resin as used in the manufacture of all varieties of cultured marble, offering good sprayability and excellent thermal shock resistance on hot-cold water cycling. 

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