The 2007 expo on adhesives and sealants offered a glimpse of the latest developments and breakthroughs The second India International Adhesives and Sealant Expo 2007 (iiase07) was held in Mumbai recently. The expo showcased the latest developments in the field of products and services and presented a plethora of B2B opportunities amongst the industry players. The event drew participation from leading adhesive and sealant manufacturers and service providers from around the world. The event also included a seminar, Adhesive Technologies in Manufacturing - the way forward in India, which highlighted on the latest technological developments in the field of adhesives and sealants. Speakers at the seminar touched upon the various developments taking place in the field of sealants and adhesives as well as supporting service fields like dispensers and dispersers. Speaking at the seminar, Naveen Seth, managing director, Henkel Adhesives and Technologies India, spoke about engineering adhesives and sealants. Concentrating on adhesives and sealants that are used for powertrain, interiors, chassis, body-in-white and paint shop applications, Naveen said, "Anaerobic sealants make an excellent sealant; they have low permeability and enable the assembler to take his time to assemble but also suffers from drawbacks like not being very tolerant to high joint movements". Pointing towards flexible anaerobic gasket material, Naveen added, "The target audience for flexible anaerobic gasket material is mainly the auto industry, the OEMs and suppliers, as it is suitable for high joint movements, offers good oil resistance combined with moisture resistance." Naveen also spoke about the new polyacrylate and referred to it as the next generation sealant. "New polyacrylate is a new generation sealant for powertrain grade cure-in-place (CIP) gasket that cures in UV light in less than 20 seconds." "Thomas used polyacrylate adhesive instead of rivets", according to Naveen, "to build bus bodies". "Structural adhesives eliminate through bolting in van body". Referring to the new polyolefin bonders, Naveen said that a two part activated acrylic based on proprietary initiator and acrylic adhesive composition, which took a long time to cure can now be cured at room temperature in a time of 24-32 hours. "We tried UV pre-applied thread lockers where the resin is pre-applied and UV cured to prepare in a few seconds. It offers good resistance to oil and enable tremendous energy savings."Speaking on PUR hot melts, Hari Prasad, General Manager, Nordson India, said, "polyurethane reactive hot melt adhesives are 100 per cent solid one component urethane polymers like a standard hot melt until they react with moisture. They bond dissimilar components and form immediate handling bonds in addition to exhibiting very high bond strength and improved moisture resistance after cure. Fully cured bond with a bit of moisture and time brings about benefits like temperature resistance, chemical resistance and creep resistance. Typical PUR hot melt applications include auto lighting, auto headliners and package (parcel shelf) tray where fabric is often bond to hard board." "Various other outstanding applications of PUR", said Hari Prasad, "include shoe sole attachment where PUR provide better and flexible bonding, plastic clear boxes and book binding where they provide excellent bonding strength and flexibility."Toshio Kawai, Senior General Manager (R&D), Three Bond Japan, spoke about new products for the auto industry. Kawai delved upon RTV silicone liquid gasketing material for oil pan and other engine sealing applications in addition to auto applications in areas like transmission, pre-coated fasteners and differentials. Speaking in comparison to RTV silicone adhesives and sealants, Kawai said, "New FIPG has better fluid resistance and tolerance to displacement even as the newest development is CIPG (cured in place gasket). The Acrylic rubber (Acrylic CIPG) has better resistivity for oil/engine oil; better compression resistance and blow out resistance." Adding that the auto industry is facing some major challenges, Kawai said, "The auto industry needs engines that burn less fuel and use less oil. Fuel cell is one example. Three Bond has been studying the market and working on sealing products. For material development target for fuel cell", according to Kawai, "Three Bond suggests TB 1152B/1153B sealants as they have good elasticity and gas permeability (H2 gas permeability and vapour permeability) versus silicone material." "Generally epoxies offer the best options for diverse applications", said Vishvas Kenkre, Technical head (IME Region), Huntsman Adhesives, which markets the Araldite brand of Adhesives and sealants in India. "Epoxies can be made to be flexible", said Kenkre, "even as PU adhesives are used for vehicle assembly, auto glazing and truck body bonding." Drawing attention towards the new MMA adhesives and sealants, Kenkre said, "The Araldite 2000 plus range will have polyurethane epoxy and methacrylate. MMA resemble epoxy and urethane but cure by a free radical mechanism. Advantages include their ability to bond on oil surfaces as they are more tolerant to unprepared surfaces and offer good elongation and excellent solvent resistance," Kenkre said that MMA was used by DaimlerChrysler to bond interior trim. Dr Venkatesh Shingankuli, director technology and quality leader, GE Bayer Silicones (India) spoke about RTV silicone room temperature vulcanizing sealants used in auto, aviation, communications and home appliances. Stating that RTV silicones are used in most of the sensors used in modern automobiles including g sensor, temperature sensor, knock sensor, airbag sensor, etc. Shingankuli said, "compared to epoxy, silicon has good thermal resistance and UV resistance, however adhesive strength is not as good as epoxy. So, we have TIM 1 and TIM 2 (thermal interface) material used in LED applications. Silicone elastomers offer a lot of opportunity in auto and electronic applications where long term performance and reliability play an important role. They aid faster curing and offer various other benefits like better resistance." If the seminar gave a glimpse of the latest developments in the field of adhesives and sealants, the iiase07, which saw the participation of several domestic and international players like Henkel, Nordson, Huntsman, ITW Dyantec, GE Bayer Silicones, Ingersoll Rand India, 3M, Uptodate Plastics, NSC India, Pidilite Industries, Three Bond, Adhesive Technologies (M) Sdn Bhd, Hardcastle & Waud, Jeson Industries, Semco Packaging, Mohm Chemical Sdn Mhd, Arizona Chemical, TAH Industries Inc (UK), SPEB Adhesives, Taiwan Sheen Soon Co, SCI-Tech, Graco, Eastman Chemical, Anabond, Metlok, Sika, KAS Plastics, ASI, McCoy Silicons, Kores India, Resinova, Flex Industries, WEICON GmbH and Pioneer Engineering, provided a good destination for those looking for new products, suppliers, new application techniques under one roof. The expo also provided enough inspiration for those who came exploring solutions for wider design capabilities in fields as diverse as automotive, packaging, construction, wood, electronics, medicine, non-woven, tobacco, rubber, footwear, handicraft, etc.