Technical Data Sheet

Magna-Tac A-39

Metal to Metal Structural Epoxy

Viscosity

Color

Base

Wt/Gal

Solids

Diluant

Shelf Life

Gray Paste

Gray

Modified epoxy

9.5 lbs.

100 %

Do not dilute

1 year

 

Magna-Tac A-39 is a 100% -solids, two-component, solvent-free, formulated epoxy adhesive in paste form specifically designed for metal-to-metal applications and for bonding other rigid materials such as glass, plastics, wood and structural laminates based on glass or fiber reinforced melamine, silicone, polyester, phenolic, epoxy, etc., resins.

This adhesive may be cured at room temperature or at elevated temperatures, depending on manufacturing conditions, properties desired and on service requirements for the finished assembly.

Magna-Tac A-39 meets military specification MMM-A-134 Type 1.

 

Surface Preparation

 All bonding surfaces must be thoroughly cleaned, degreased and dried. For plastic surfaces, remove mold release if any.

 

Preparation of Adhesive

Weigh each part accurately and mix slowly to avoid entrapment of air.

Note: Pot life can be lengthened substantially if shallow mixing vessels are used or smaller batches are mixed. Cover mixed material to prevent water absorption

Depending upon the end use service requirements of the completed bond, Magna-Tac A-39 may be used with hardeners which set at room temperatures, at moderate temperatures and at elevated temperatures.

 

  Cure Time

 

 

 

Mixing Ratio (by weight)

Properties

Pot Life

@ 77 F

Aver. Tensile Strength

Part A

Part B

7 PARTS

2 PARTS

For best balance of properties. 30 min

(175 gms)

2500 psi

 

Heat Curing

 

75% of cure is attained in 24 hours. To accelerate the cure, any of the following cycles may be used:

 

Temperature

Cure Time

150 F

60 minutes

200 F

25 minutes

250 F

15 minutes

 

Where military specification qualification is necessary, A39 must be cured for 1 hour at 164 F.

 

Application

Mixed Magna-Tac A-39 may be applied with trowel, spatula, knife, etc. Apply enough mixed adhesive to fill all cavities and depressions in both surfaces being bonded and to leave about 4 additional mils of adhesive on each side. After proper mating of the components (with slight squeeze out of adhesive), optimum bond line thickness should range from .003 to .006 inch. (Very heavy glue lines may be tolerated up to 0.010 inch - and the adhesive may be cured in heavy sections with very little shrinkage and with good resultant bond strength.) Assemble the parts immediately after spreading the adhesive since there are no volatile solvents present to be evaporated.

 

Clean-up solvent.

Do not add thinner to this adhesive. Methyl Ethyl Ketone may be used for cleaning equipment or wiping up spilled adhesive before curing.

 

Beacon Chemical Company

For Ordering & Technical Assistance

Tel: 914-699-3400

Fax: 914-699-2783

e-mail  davidmesh@cs.com

 

The information given and the recommendations made herein are based on our research and believed to be accurate but no guaranty of their accurate is made. The products discussed herein are sold without any warranty as to merchantability or fitness for a particular purpose or any other warranty, express or implied

 

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 BEACON ADHESIVES, Inc., 125 MacQuesten Parkway South, Mount Vernon, NY 10550, Tel: (914) 699-3405
E-mail: davidmesh@cs.com