Technical Data Sheet

Magna-Tac M666

Ambient temp curing epoxy

 

 

Viscosity

Color

Base

Wgt/Gal

Solids

Diluant

Shelf Life

Part A

Part B

Medium Syrup

Red

Amber

Modified epoxy

9.5

8.2

100 %

100%

Do not dilute

1 year

 

MagnaTac M666 is an easy to handle, equal mix by volume, 100% reactive, two part, formulated epoxy adhesive which produces high strength bonds between a wide variety of materials. Coated parts may be mated without delay to cure at room temperature and do not require pressure other then that necessary to keep components in intimate contact during cure.

Fully cured bonds exhibit minimal shrinkage, are electrical insulators and provide excellent resistance to weather, galvanic action and most chemical, acids and alkalis.

 

It is especially designed for: 

NOTE: Fully cured panels consisting of degreased steel or etched aluminum skins and foamed glass cores produced with this adhesive pass PFL Test Cycles (ASTM Test D1037-55T0) also given in ASTM C481, Cycle A).

Fully Cured metal to metal bonds, tested at room temperature using MMM-A-132 procedures, yield up to 3500 psi. Bonds involving expanded styrene foam withstand 175F to 200 hours without cell attack.

 

 

 

Mixing Ratio (by weight)

Properties

Pot Life

@ 77 F

Average Tensile Strength

Part A

Part B

100 PARTS

100 PARTS

For best balance of properties. 1 hour ( 1 qt) 2500 psi

 

 

Surface Preparation

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

 

Preparation of adhesive

 

Always stir each part thoroughly first. Proportion accurately and mix slowly to avoid entrapping 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.

Mixed adhesive may be applied with trowel, spatula, knife, paint roller, brush, etc. Apply enough mixed adhesive to leave about 4-6 mils in the final glue line. This may be accomplished by coating 4-6 mils on one surface only or by coating 2-3 mils on each surface.

If one surface is porous, more adhesive must be applied to fill the voids and yet produce a final glue line thickness of 4-6 mils.

 

 

  Cure Time

 

Room Temperature

At room temperature, assemblies can be handled in approximately 8-14 hours. MagnaTac M666 develops 85% of its maximum strength in 24-48 hours.

NOTE: The bond continues to advance in strength for approximately one week.

 

Fast Cure

If a faster cure is required, the following cycles may be used:

 

Elevated Temperatures

 

Temperature

Cure Time

150 F

120 minutes

200 F

45 minutes

250 F

30 minutes

300 F

10 minutes

 

Bonds will continue to improve in strength at room temperature until optimum is reached, usually within 3-4 days.

Typical lap shear values obtained when Magna-Tac 666 is used to bond 0.064" etched 2024T3 aluminum alloy to itself in a 1/2 overlap are as follows:

 

Test Temperature

Tensile Shear, psi

-67 F

2000

77F

2500

180F

400

 

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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