Urethane Adhesives

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Overlap Shear Strength-Plastics: The following are typical data after a full cure

showing the adhesion of Scotch-Weld Urethane Adhesives 3532 B/A, 3535 B/A and

3549 B/A to various plastic substrates. All data were developed on 1/8-inch thick,

1/2-inch overlap, 1-inch wide specimens with .005-inch thick bondlines that had been

abraded and alcohol wiped prior to bonding. Values are in psi.

Tensile and Elongation: Scotch-Weld Urethane Adhesives 3532 B/A, 3535 B/A and

3549 B/A have been tested according to ASTM-D-738 at 2 inches/min. Cure: 1 hour

at 250°F (121°C), 30 min. at 285°F (141°C).

Temperature

Tensile

Elongation

Room Temperature

3000 psi

96%

Rate of Strength Buildup: The following are typical test data showing the rate of

strength buildup at various temperatures and times.

Substrate

Test Temperature

-40°F (-40°C)

75°F (24°C)

180°F (82°C)

Nylon

240

580

40

Lexan™

125

Plexiglass™

620

1300

70

FRP

180

Rigid PVC

370

960

110

ABS

810

300

Polystyrene

330

530

110

Typical Performance

Characteristics

Overlap Shear Strength-Metals: The following are typical data after a full cure

showing the adhesion of 3M™ Scotch-Weld™ Urethane Adhesives 3532 B/A, 3535

B/A and 3549 B/A to various metal substrates. All aluminum data were developed on

.063-inch thick 2024 T-3 clad aluminum and all steel data on .035-inch cold rolled

steel. Test specimens were 1/2-inch overlap, 1-inch wide with .005-inch thick

bondlines pulled at a testing rate of .1-inch/min. All values are psi.

Substrate

Test Temperature

-40°F (-40°C)

75°F (24°C)

180°F (82°C)

Etched Aluminum

2500

2000

300

Abraded and Solvent Wiped Aluminum

2000

2000

300

Solvent Wiped Aluminum

1000

1000

100

Abraded and Solvent Wiped Steel

2000

1200

100

Solvent Wiped Steel

1000

700

20