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Scott Bader’s Crystic Crestomer Range of Urethane Acrylate Adhesives Acquires RINA Certification

Published on 2013-06-13. Author : SpecialChem

Registro Italiano Navale (RINA) Group has given a new approval and reapproved grades from Scott Bader's Crystic® Crestomer® range of high performance urethane acrylate structural adhesives. A new RINA certification has been awarded to Crystic Crestomer 1153PA for the structural bonding of glassfiber reinforced plastic composites.

Crestomer 1153PA, which is pre-accelerated, and MEKP cured (2% w/v), was developed by Scott Bader to offer an 80% longer working time to OEMs, fabricators and installers who want to bond together very large GRP parts. According to Scott Bader's published technical data at standard 250C (770F) ambient conditions, Crestomer 1153PA has a 40 minute longer working time of up to 90 minutes compared with 50 minutes for Crestomer 1152PA. Both Crestomer grades are used by leading fiberglass boat builders for a variety of demanding structural applications. In particular, GRP hull bulkhead bonding is specified in preference to FRP over-laminating to significantly reduce weight, speed up production, reduce VOC emissions and avoid fiber print through.

With its significantly longer geltime, Crestomer 1153PA is specifically aimed at bonding applications for fiberglass boats over 25 meters (82ft) long, as well as other non-marine structural applications. This is where very large GRP parts need a longer adhesive open working time during assembly to provide sufficient time to accurately position such large GRP moldings. Having a longer adhesive open time can be vital, not just on a factory shop floor, but for building and construction projects where GRP sectional parts are installed on site, typically where parts are lifted by crane into position and then secured and bonded.

GRP fabricators located in hotter parts the world, with typical ambient temperatures above 270C (~810F), have also seasonally switched to using Crestomer 1153PA to get the optimum working time needed throughout the year.

Two other grades have also been re-approved by RINA: Crestomer 1152PA; and Crestomer Advantage 30, which is a pre-packed 380ml cartridge. Back in May 2009, RINA certification approval was also given to Crystic Crestomer 1196PA for its use as a structural adhesive to bond cores and skin laminates in marine sandwich structures. Crestomer structural adhesives have also been awarded Lloyds acceptance and DNV approvals for GRP marine applications, which covers structural adhesives for use in the most critical FRP bonding applications. These include lifeboat and evacuation systems for the offshore, cruise and shipping industries, for which Crestomer 1152PA has been specified.

The Crystic Crestomer range is available in a keg, drum and cartridge options for application using a manual or pneumatic gun, along with static mixers and dispensing equipment for high volume bonding. Crystic Crestomer products, developed and manufactured by Scott Bader for over 40 years, are proven in use globally by leading fiberglass boat builders. They offer a highly cost effective method of fiberglass boat construction, which contributes to weight reduction, improves overall build quality both structurally and aesthetically, and improves shop floor working conditions by reducing overall styrene emissions.

Registro Italiano Navale (RINA) Group business activities cover a range of assessment, control, certification, and research services related to materials, design, technology, products, and plants. RINA internationally provides its assistance and consultancy services to economic and institutional operators in a range of sectors, including marine and yachting.

About Scott Bader

Scott Bader was established in 1921. Today it is a €225 million global chemical company, employing over 600 people worldwide. It is a common trusteeship company, having no external shareholders, with a strong commitment to support its customers, workforce and the environment. Scott Bader's headquarters is based in the UK where it has purpose-built, state-of-the-art technical facilities that provide R & D as well as complete evaluation, testing and application support. It has manufacturing facilities in Europe, The Middle East, South Africa, Canada and India.

Source: Scott Bader


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