NetComposites
Thermwood

New 1:1 Adhesives from Plexus

27 November 2007

Three New Plexus structural adhesives have been introduced to produce strong yet flexible bonds on composites and offer medium to long working times for large assemblies.

Plexus say that they require little or no surface preparation and cure at room temperature to tough, durable bonds that withstand service temperatures of - 40° to 180° F. Two-part structural methacrylates dispensed manually or with standard meter-mix equipment, MA530, MA560-1, and MA590 are 100% reactive, non-sagging gels recommended for joining composite assemblies, ABS, acrylics, FRP, gelcoats, polyesters (including DCPD modified), PVC, styrenics, and vinylesters. They are intended for boats, trucks, buses, architectural ornamentation, wind turbine blades, and composite bridges and decks.

MA530 has a working time of 30-40 minutes and fills gaps up to 0.70”. A 0.03” bond line achieves approximately 75% of its ultimate shear strength in 90-160 minutes at 74° F, according to preliminary testing data. It is available in ready-to-use 400-ml cartridges, 5-gallon pails, and 50-gallon drums.

MA560-1 has a longer working time (55-70 minutes) and fills gaps up to 1.00”. It is recommended for large structures as well as small-part assembly where fewer workers are required. Fixture time for a 0.03” bond line is 220-240 minutes at 74° F. This adhesive is also recommended for certain metals and many other substrates. It is available in ready-to-use 400-ml cartridges, 5-gallon pails, and 50-gallon drums.

MA590, with a very long working time of 90-105 minutes, was formulated for building large fibreglass boats but of course is acceptable for other applications. A 0.03” bond line achieves approximately 75% of its ultimate shear strength in 180-240 minutes at 74° F. Like MA560-1, this adhesive fills gaps up to 1.00” and is recommended for certain metals in addition to many other substrates. It is available in ready-to-use 400-ml cartridges, 5-gallon pails, and 50-gallon drums.