ITW Plexus® MA3940LH Methacrylate Adhesive

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ITW Plexus® MA3940LH Methacrylate Adhesive
Categories:	Polymer; Adhesive; Thermoset; Methacrylate; Methacrylate Adhesive
Material Notes:	Plexus® MA3940LH is a new generation of fast-setting two-part methacrylate adhesives specifically designed for the structural assembly of advanced automotive components1. Combined at a 10:1 ratio, it has a working time of 4 to 5 minutes and achieves 75% of ultimate strength in 8 to 10 minutes. After mixing, Plexus MA3940LH cures rapidly to form a tough, elastomeric bond with superb shear, peel, fatigue, and impact strength over a wide temperature range. In addition, this product has superior toughness at temperatures below -17°C. Plexus MA3940LH is off white and is supplied in ready-to-use cartridge, 5-gallon (20-liter) pails, or 50-gallon (200-liter) drums to be dispensed as a non-sagging gel. Excellent resistance to: Acids and Bases (pH 3-10), Salt Solutions. Susceptible to: Polar Solvents, Strong Acids and Bases. Adhesive color; off white (uncured-room temperature). Activator color: off white (uncured-room temperature) Information provided by ITW Performance Polymers.
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Physical Properties	Original Value	Comments

Density	7.80 lb/gal	adhesive. Uncured.
	8.18 lb/gal	Cured
	8.65 lb/gal	Activator. Uncured.
Volatile Organic Compounds (VOC) Content	<= 10 g/l	During cure
Viscosity	30000 - 70000 cP @Temperature 22.2 °C	Activator
	120000 - 160000 cP @Temperature 22.2 °C	Adhesive

Mechanical Properties	Original Value	Comments
Tensile Strength	1160 - 1740 psi	ASTM D638
Elongation at Break	75 - 100 %	ASTM D638
Tensile Modulus	17700 - 20300 psi	ASTM D638
Adhesive Bond Strength	1200 - 1600 psi	Lap Shear Cohesive Strength; ASTM D1002

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	250 °F
Minimum Service Temperature, Air	-40.0 °F
Flash Point	51.0 °F

Processing Properties	Original Value	Comments
Working Life	4.00 - 5.00 min @Temperature 23.3 °C
Shelf Life	7.00 Month	Cartridges
	7.00 Month	Activator (B side)
	13.0 Month	Adhesive (A side)

Descriptive Properties
Fixture Time (mins)	8 to 10	Room temperature cure. Fixture time varies with bond gap and ambient temperature. Present values were measured at 74°F.
Gap Filling (in)	0.04 to 0.16	Room temperature cure.
Mix Ratio by volume	10 to 1	Adhesive to Activator. Room temperature
Mix Ratio by weight	8.9 to 1	Adhesive to Activator. Room temperature

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PITWP9016 / 239526

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