JEC COMPOSITES MAGAZINE - Issue #73 - June 2012 - 75

Global technical support Scott Bader provides global technical support for pultruders interested in using Crestapol 1212 and 1214 resins. This includes offering “bespoke solutions” to customers in order to provide the best option for individual requirements. Several development projects with leading pultruders in Europe, China and South America are currently ongoing for profiles used in a range of rail, metro and building applications.

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needs. The inherent toughness of the cured urethane acrylate-based resin matrix provides pultruded profiles with very high mechanical properties, even with high mineral filler loadings. These urethane acrylate resins have been developed to achieve the highest international FST performance standards. So, for a variety of challenging applications, mechanically superior profiles can be produced which also meet demanding FST test standards.

Crestapol 1212 and 1214 resins can be heavily filled with up to 200 parts per hundred of resin (phr) by weight of alumina trihydrate (ATH) filler. Crestapol 1214 is a low-profile urethane acrylate-based resin that is recommended for applications where high fire resistance (FR) properties are required in combination with the lowest shrinkage and a very smooth, glossy high-quality surface finish. Pultruded profiles made from ATHfilled resins up to 200 phr can achieve a wide range of international fire, smoke and toxic fumes standards specified for building and transportation applications, including overground and underground rail applications. ATH-filled glass-reinforced laminates of both grades have passed DIN 5510 S4/SR2/ST2, French épiradiateur NFP 92-501-M1 and NFF 16-101-F0, as well as the more stringent Spanish M1/F0 fire resistance test for interior rail applications. When used in closedmould applications in combination

with Scott Bader’s Crystic® Fireguard 70PA intumescent topcoat, the 1212 grade with 170 phr of ATH achieves Firestarr HL2 performance to CEN TS45545-2:2009. This resin is also compatible with standard pigments, allowing high-quality colouration of components to be achieved.

Successful applications in Spain
Two leading Spanish pultruders have both seen major benefits, including improved productivity and enhanced product performance, from using Crestapol 1212 resin to more cost-effectively produce a variety of pultruded profiles for building, land transportation and industrial applications. Polymec S.L., based in Murcia, specializes in the production of pultruded carbon fibre and glass fibre-reinforced composite profiles. During 2010, they successfully completed extensive trails and switched to using ATH-filled Crestapol 1212 resin for various rail interior profile applications, such as cable covers. They chose this grade because the resin enables them to attain the required mechanical and fire resistance properties with respect to fire, smoke and toxicity, while also allowing them to increase their production rate, which has boosted productivity. Another specialist pultruder, Technipul Composites S.L., located in Barcelona, also switched to ATH-filled Crestapol 1212 resin, which is now specified for a variety of glass fibrereinforced profiles used for exterior and interior parts which must meet stringent FST specifications for both overground and underground trains, in metro stations and rail tunnel roofs. They have specified this resin because it meets the fire retardant performance needed in combination with providing good mechanical properties and an excellent surface finish. n

Fig. 2: Crestapol 1212 fracture toughness versus Iso UP and VE resins

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No73 June 2012

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JEC COMPOSITES MAGAZINE - Issue #73 - June 2012

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