The company’s two-part conformal coating range – 2K – has been a breakthrough for customers, combining the tough, resistant properties of a resin, with the easy application of a coating. Up until now, most of the 2K range consists of polyurethane coatings, however, due to increasing demand, the company has developed a silicone 2K conformal coating, 2K750. This has been formulated for selective-coating with greater thickness and improved edge coverage. The UL94V-0 compliant coating also features a wide operating temperature range of –40 to +220 °C, with a high continuous use temperature of 200 °C. The tough, low-stress coating has a fast thermal cure time of 10 mins at 80 °C, in addition to curing at ambient temperature, and provides excellent adhesion to most solder resists and metals.
Throughout the development of the 2K range, the company has worked closely with selective coating machine manufacturers to ensure that these formulations are fully optimized for application using commercially available dispensers. Included among these is PVA‘s two-component spray valve modification, VPX-2KS. During the show, Jonathan Urquhart will host a presentation, entitled ‘Implementing 2 component conformal coatings into high volume production and their benefits’ (S31: Conformal Coatings II / Circuit Protection). The presentation will take place on Thursday, March 1st at 10.30am and will give more insight about the advantages of two-part, high performance conformal coatings for harsh environment.
The Moisture Cure Silicone conformal coating, MCS, will also be launched at the show. It is a soft, flexible, low stress coating with a wide operating temperature range (-40 to +200 °C) and a high continuous use temperature of 180 °C. The low viscosity, solvent-free silicone material provides a rapid touch-dry time at ambient conditions (10 mins at 25 °C, 50 % RH), which can be further accelerated with heat, and fully cures within 48 hours.
The company’s Heat Cure Silicone coating, HCS, is a low viscosity, solvent-free material with a fast full thermal cure time of 10–12 mins at 110 °C. This low odor coating meets the requirements of UL94V-0 and has virtually no cure by-products. Developed with improved adhesion, it is a soft, yet tough, low stress coating with a wide operating temperature range (-40 to +200 °C) and a high continuous use temperature of 180 °C.
Apex, Booth 3532