Elite Plastics have now versified our business & now are specializing in spray polyurethanes, onsite and in our workshop. WHAT IS POLYURETHANE? Polyurethane and Polyurea elastomeric coatings technology is one of the fastest growing technologies of choice for many industrial applications particularly in harsh application environments and / or where the application requires additional performance characteristics other than just corrosion protection. Basically polyurethane is the result of a chemical reaction between an isocyanate and a polyol resin blend. The polyurethane system is made up of various polyol subcomponents (polyether, polyester) and as a rule requires catalysts in order to cure rapidly. An advantage of the polyurethane system that the catalyst can be adjusted to control the reaction profile to fit the application. Some applications require a smoother finish, but if the system gels too fast, a rough orange peel surface will result. Polyurethanes are mostly spray applied but can be cast and sometimes hand rolled. Typically, the Gel (or cured to touch) time for spray applied polyurethane systems ranges from 15 - 30 seconds. It is this fast setting time that provides many of the application advantages. For example some applications require the coating to flow into hard to spray areas or corners and so need a few extra seconds before gelling. POLYURETHANE APPLICATIONS Polyurethane can be applied to virtually any required thickness in one application. They are not usually multi coat systems. This results in very fast application and turnaround times. TANK LININGS Premium polyurethanes are 100% solids, instant setting, two component, highly cross linked, polyurethane coatings suitable for potable water and they offer dramatic advantages over the conventional solvent based epoxy technologies or solvent enhanced polyurethanes. A premium polyurethane also has zero taste impact, very important when assessing potable water approval, particularly taste issues, because many other polyureas and polyurethanes do impart a plastic taste when it comes to potable water. Not only do the unique curing features of premium polyurethane systems drastically reduce the amount of time it takes to actually line the tank, they also cut the required curing time by over one third. PIPE LINING The advantage of premium polyurethanes is that they can be applied after manufacture of the pipe and therefore do not require a large infrastructure cost to manufacture a pre-lined pipe. Spray applied premium polyurethanes can also be sprayed or poured out in remote field locations and still retain the fantastic protection required for field joints, internal connections commonly found in the pipe industry. BUND Premium polyurethanes give the applicator and customer the opportunity to apply a seamless membrane to an existing bund or a cheaply manufactured earthen bund in a short time without great infrastructure cost. Premium polyurethanes can also be designed to have densely cross-linked characteristics to dramatically resist chemical attack. WATER, WASTE WATER AND SEWERAGE The water, wastewater and sewerage industry requires a corrosion protection system that is able to withstand the corrosive environment often experienced by municipal infrastructure. Specially formulated premium 1:1 polyurethanes offer far superior protection than standard systems, giving excellent chemical, impact and abrasion resistance, improved adhesion, and resistance to cathodic disbondment and undercutting. The Benefits of Elastomeric Polyurethane Linings elastomeric polyurethane and polyurea coatings protect a variety of structures today, including storage tanks, oil and gas pipeline, water and wastewater, marine vessels, and commercial facilities. The applications have been successful because of: Ø Excellent life expectancy and superior mechanical performance , Ø Excellent resistance to aggressively corrosive environments, Ø Excellent abrasion resistance, Ø High impact resistance Ø Fast application, Ø Low and cold temperature curing capability, Ø Excellent adhesion, Ø Unlimited film build in one application, Ø And compliance with the most rigorous regulations on solvent and volatile organic compound (VOC) emissions.
Posted on: Wed, 08 Oct 2014 09:41:29 +0000
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