Emerald Group Publishing Limited
Copyright © 2000, MCB UP Limited
Polyurethane elastomer system
Keywords Hyperlast, Coatings, Polyurethanes, Elastomers
Following several months of intensive research and development, British company, Hyperlast Limited reports that it has strengthened its range of polyurethane elastomer systems, with the introduction of "Diprane" 55.
A two-component system of polyester MDI quasi-prepolymer and formulated polyol curatives, the new system claims to combine the versatility and flexibility of its predecessors, while offering increased production efficiency and several performance advantages including improved abrasion and tear properties. It is available in a neutral colour, allowing pigmentation to the customer's specific requirement.
Used throughout hazardous environments such as minerals and materials handling, "Diprane" 55 can reportedly be found in a diverse range of applications, from linings in pumps and pipes, on conveyor belts, hoppers and chutes and as sprayed or cast coatings, wherever abrasion is a problem. It is also claimed to be able to resist oils, cutting fluids, detergents and the weather.
The wear resistance properties of "Diprane" 55 are said to be able to withstand aggressive slurries and countless impacts from rocks, coals and rough metal edges.
Providing a choice of hardness from Shore A 55 to 85, it claims to provide high tensile, tear strength and is believed to have excellent abrasion resistance. It is reported to be relatively simple to process, with low-pressure dispensing equipment and moulds at 70° to 100°C, giving a demould time of 20 to 30 minutes. These properties are said to be achieved with reduced process temperature from conventional polyurethane moulding, resulting in additional benefits of lower energy use.