AO420 Technical
Data Sheet
Benefits
No Surface Preparation
High Toughness
100% Reactive
Non-Sagging Characteristics
Room Temperature Cure
Working Time2
4 - 6 minutes
Fixture Time3
15 - 18 minutes
51°F Flash Point
Operating Temperature
-40°F to 250°F
Gap Filling to 0.25 inches
Mixed Density
8.10 lbs/gal (0.97 g/cc) Chemical Resistance4
Excellent resistance to
• Hydrocarbons
• Acids and Bas
(3-10 pH)
• Salt Solutions
Susceptible to:
• Polar Solvents
• Strong Acids and Bas Recommended for:
ABS
ftprush
Acrylics
Aluminum*
FRP
Gelcoats6
PVC
Polyesters (including DCPD
品牌规划modified)
Steel, Carbon7*
Steel, Stainless*
Styrenics
Urethanes (General)
Vinyl Esters安仁二中
* Plexus Primer Suggested Plexus® AO420 is a two-part methacrylate adhesive designed for structural bonding of thermoplastic, metal and composite asmblies1. Combined at a 10:1 ratio, it has a working time of 4 to 6 minutes and achieves 75% of ultimate strength in 15 to 18 minutes. Plexus AO420 is the standard choice for composites bonding applications in the transportation industry, becau it requires virtually no surface preparation. In addition, this product provides a unique combination of high strength, excellent fatigue endurance, outstanding impact resistance, and superior toughness. Plexus AO420 is available in off-white, blue or black and is supplied in ready-to-u cartridges, 5-gallon pails, or 50-gallon drums and can be dispend as a non-sagging g
el using standard meter-mix equipment.
月季花的功效与作用Physical Properties (Uncured) -Room Temperature
Adhesive Activator Viscosity, cP 100,000 - 125,000 50,000 - 70,000 Color Off-White Off-White, Blue, Black Density, lbs/gal (g/cc) 8.00 (0.96) 8.95 (1.07)
Mix Ratio by Volume 10.0 1.0
Mix Ratio by Weight 8.9 1.0 Mechanical Properties (Cured) -Room Temperature
Tensile (ASTM D638)
Strength, psi 2,700 – 3,000
数学辅导六年级
架子鼓教程Modulus, psi 75,000 - 100,000
Strain to Failure (%) 100 - 125
Lap Shear (ASTM D1002)
Cohesive Strength, psi 1,750 – 2,250
5
HANDLING AND APPLICATION
Plexus® AO420 adhesive (Part A) is flammable. Contents include Methacrylate Ester. Keep containers clod after u. Wear gloves and safety glass to avoid skin and eye contact. Wash with soap and water after skin contact. In ca of eye contact, flush with water for 15 minutes and ge
t medical attention. Harmful if swallowed. Keep out of reach of children. Keep away from heat, sparks, and open flames. Reference the Material Safety Data Sheet for more complete safety information.
Note: Becau of the rapid curing features of this product, large amounts of heat are generated when large mass of material are mixed at one time. The heat generated by the exotherm resulting from the mixing of large mass of adhesive can result in the relea of entrapped air, steam, and volatile gas. To prevent this, u only enough material as needed for u within the working time for the product and confine gap thickness to no more than .375 inch. Questions relative to handling and applications should be directed to ITW Plexus at 800-851-6692.
DISPENSING ADHESIVE
AO420 may be applied manually or with automated equipment. Automated application may be accomplished with a variety of 10 to 1 meter mix equipment delivering both components to a static mixer. For information concerning meter-mix equipment, contact ITW Plexus Sales Reprentatives. Pre-measured cartridges are also available, as well as the hand-held guns with which to dispen the adhesive. For more information, contact ITW Plexus at (800) 851-6692. To assure maximum bon
d strength, surfaces must be mated within the specified working time. U sufficient material to ensure the joint is completely filled when parts are mated and clamped. All adhesive application, part positioning, and fixturing should occur before the working time of the mix has expired. After indicated working time, parts must remain undisturbed until the fixture time is reached. Automated equipment should be constructed of stainless steel or aluminum. Avoid contact with copper or copper containing alloys in all fittings, pumps, etc. Seals and gaskets should be made of Teflon, Teflon-coated PVC foam, ethylene/propylene or polyethylene. Avoid the u of Viton, BUNA-N, Neoprene or other elastomers for als and gaskets. Clean up is easiest before the adhesive has cured. Citrus terpene or N-methyl pyrolidone (NMP) containing cleaners and degrears can be ud for best results. If the adhesive is already cured, careful scraping, followed by a solvent wipe may be the most effective method of clean up.
EFFECT OF TEMPERATURE
Application of adhesive at temperatures between 65o F and 80o F will ensure proper cure. Temperatures below 65o F will slow cure speed; above 80o F will increa cure speed. The viscosities of Parts A and B of this adhesive are affected by temperature. To ensure consistent dispensing in meter-mix equipment, adhesive and activator temperatures should be held reasonably
constant throughout the year. Adhesive in cured state behaves differently at elevated and reduced temperatures. See ITW Plexus for specific values.
STORAGE AND SHELF LIFE
Shelf life of AO420 adhesive (Part A) is 1 year from day of shipment from ITW Plexus. Shelf life of the black activator (Part B), including cartridges that contain black activator, is 6 months from day of shipment. Shelf life of the off-white and blue activators (Part B), including cartridges that contain the activators, is 9 months from day of shipment. Shelf life is bad on continuous storage between 55°F and 75°F. Long-term exposure above 75°F will reduce the shelf life of the materials. Prolonged exposure of activators, including cartridges, which contain activators, above 100°F quickly diminishes the product’s reactivity and should be avoided. Shelf life can be extended by refrigeration (45°F - 55°F). The products should never be frozen.
Notes
1 ITW Plexus strongly recommends all substrates be tested with the lected adhesive in the anticipated rvice conditions to determine
suitability.
2Working Time: The time elapd between the moment Parts A and B of the adhesive system are combined and thoroughly mixed and the time when the adhesive is no longer uable. Times prented were tested at 75°F.
3Fixture Time: The interval of time after which surface being joined will support a 2 lb. (1 kg) dead weight on a 1/2 inch (12.7 mm) overlap joint 1 inch (25.4 mm) wide without movement.Times prented were tested at 75°F.
4Resistance to chemical exposure varies greatly bad on veral parameters including; temperature, concentration, bondline thickness, and duration of exposure. The chemical resistance guidelines listed assumes long-term exposures at ambient conditions.
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5 In a typical bond line, exotherm temperatures will be lower than the temperatures shown.
6Urethane-modified super-weathering gelcoats may require an alternate adhesive. As with all substrates, the gelcoats should be tested with the lected adhesive to determine suitability.
7Exterior applications require the u of coatings or primers that will inhibit oxidation of the steel.
All information on this data sheet is bad on laboratory testing and is not intended for design purpo
s. ITW Plexus makes no reprentations or warranties of any kind concerning this data. Due to variance of storage, handling and application of the materials, ITW Plexus cannot accept liability for results obtained.
AO420 Rev 3. 01/2005
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