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6/29/2015 | 1 MINUTE READ

Structural adhesives product line expanded

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Scott Bader (Wollaston, UK) has introduced two new Crestabond grades of methacrylate primerless structural adhesives, now available in black.

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Scott Bader (Wollaston, UK) has introduced two new Crestabond grades of methacrylate primerless structural adhesives, now available in black. They have been added to the M7 (1:1) range. Crestabond M7-05 Black and M7-15 Black have been specifically developed by Scott Bader in response to customer demand, particularly from fabricators bonding pigmented ABS and carbon fiber composite components. These two new 1:1 mix ratio grades are in addition to existing black grades, which up until now have only been available in the Crestabond M1 (10:1) range. With the significant growth in applications now specifying carbon fiber to achieve a lighter weight, the need for a black pigmented adhesive system has significantly increased for the latest designs of finished composite parts now being structurally bonded in applications for motorsports, high-performance and luxury cars, electric vehicles, racing yachts and sports equipment, where aesthetics and finish quality are important. Both new black colored grades are variants of the existing Crestabond M7 off-white grades in the range. They exhibit the same attributes, handling and performance properties including good fatigue and impact resistance; good gap-filling capabilities up to 5 mm; and minimal surface preparation required prior to bonding. Crestabond M7-05 Black has a working time of 4-7 minutes and a fixture time of 18-22 minutes; the Crestabond M7-15 Black grade offers a working time of 10-20 minutes and a fixture time of 30-45 minutes. Both new grades have a viscosity of 30,000-70,000 centipoise (cP) and offer a tensile modulus of 1200-1700 MPa, with a tensile strength between 22-25 MPa, and an elongation of 33-35% depending on the specific grade. M7-05 Black and M7-15 Black are suitable for bonding a range of engineering material substrates such as composites, stainless steel, aluminium, cold rolled and galvanised metals, ABS, acrylic and polycarbonate.