ITW Plexus® MA685 Methacrylate Adhesive

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ITW Plexus® MA685 Methacrylate Adhesive
Categories:	Polymer; Adhesive; Thermoset; Methacrylate; Methacrylate Adhesive
Material Notes:	Plexus® MA685 is a two-part methacrylate adhesive designed for solid surface seaming and assembly. MA6685 is highly translucent and clear, UV stable and non-yellowing. It offers excellent adhesion to a variety of solid surface sheet materials including cast acrylic and cast/densified polyester. It exhibits high resistance to water, impact, wear, scuffing, boiling water, high temperature and UV light. Combined with MA685 activator at a 10:1 ratio, it has a working time of 8 to 11 minutes and achieves handling strength in 20 to 25 minutes. Excellent resistance to: • Water • Impact • Scuffing • High Temperatures • Ultra-violet light (UV). Recommended for: • Acrylic sheet • Polyester sheet • Thermoplastics • Gel coats • FRP / Composites. Adhesive color: light blue. Activator color: water white. Information provided by ITW Performance Polymers.
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Physical Properties	Original Value	Comments

Density	8.50 lb/gal	adhesive. Uncured.
	8.96 lb/gal	Cured
	9.60 lb/gal	Activator. Uncured.
Volatile Organic Compounds (VOC) Content	<= 20 g/l	During cure
Viscosity	18000 - 24000 cP @Temperature 22.2 °C	Adhesive
	30000 - 40000 cP @Temperature 22.2 °C	Activator

Mechanical Properties	Original Value	Comments
Tensile Strength	3500 - 4500 psi	Butt Joint
Flexural Strength	4500 - 5500 psi	4- point bend.; ASTM D790

Processing Properties	Original Value	Comments
Working Life	7.00 - 12.0 min @Temperature 23.3 °C
Shelf Life	9.00 Month	Activator (B side)
	12.0 Month	Adhesive (A side)

Descriptive Properties
Fixture Time (mins)	18 to 25	74°F cure. Varies with bond gap and temperature.
Maximum Bond Gap (in)	0.25	Room temperature cure.
Mix Ratio by volume	10 to 1	Adhesive to Activator. Room temperature
Mix Ratio by weight	9.43 to 1	Adhesive to Activator. Room temperature

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PITWP9004 / 239514

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