TPT March 2012

T echnology N ews

Polyurethane cure-in-place pipe IST (Innovative Sewerage Technologies), a producer of sewer rehabilitation products, has launched the world’s first polyurethane- based cure-in-place pipe repair system for the trenchless technology market. working practices. Traditionally companies repairing sewer networks have had to rely on epoxy resins with a relatively short pot life. This meant impregnating hoseliners on-site, prior to insertion, often under unfavourable conditions. curing techniques (>75°C) and less than one hour using steam methods. VITROX ® resin can be used with standard CIPP equipment and after curing is resistant to temperatures of up to 120°C.

With a working time of up to 24 hours between liner impregnation and installation, plus snap cure capabilities, the solution is seen as a breakthrough in CIPP system technology, offering utility companies and contractors significant time and cost savings in the repair of broken or fractured sewer pipes. The new IST solution comprises a traditional needle-felt liner and a polyurethane resin called VITROX ® – a unique isocyanate product developed by Huntsman Polyurethanes, one of the world’s major chemical companies. VITROX ® resin is a two-component system with an exceptionally long pot life. Its increased working time window has the potential to revolutionise CIPP

VITROX ® resin has been tested extensively in the field by IST and is currently undergoing German national certification from Deutsches Institut für Bautechnik (DIBt) Berlin – a third party institute. IST provides full system solutions for the repair of pipes including cameras, pipecutters, resins and liners. The company was formed in 1998. Headquartered in Germany, it has sites around the world and is a leading manufacturer of sewer rehabilitation products. Innovative Sewerage Technologies – Germany

Using VITROX ® , far more time is available between resin application and installation. As a result, liners can be prepared off-site, the day before application, at a suitable indoor location. This reduces the risk of mixing faults, which can occur on outdoor sites because of inclement weather conditions. It also means actual repair work can start on-site as soon as the team arrives each day – saving time and money. A further benefit is the speed at which VITROX ® resins can cure. With a unique snap cure mechanism VITROX ® resins will harden on demand when the system reaches an elevated, predefined temperature. For the CIPP market this has been set at just two hours using water-

Email: vitrox@huntsman.com Website: www.ist-web.com

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