Urethane Adhesives

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3M™ Scotch-Weld™ Urethane Adhesive 3549 B/A at room temperature

Specimens: 1/2-inch overlap fiber reinforced plastic to primed steel, 0.32-inch

bondline. Specimens were pulled at 2 inches/min.

Time (Hours)

Overlap Shear Strength (PSI)

42

611

880

16

460

24

700

48

1170

Scotch-Weld Urethane Adhesive 3549 B/A at various temperatures

Specimens: 1/2-inch overlap fiber reinforced plastic to primed steel, .032-inch

bondline. Specimens were placed in an oven at designated temperature for the

specified time. Bonds were then cooled for 1 min. and pulled at a rate of 2 inches/min.

Temperature

Time (Minutes)

Overlap Shear Strength (PSI)

150°F (66°C)

20

53

30

227

40

259

50

508

180°F (82°C)

20

293

30

391

40

576

50

684

200°F (93°C)

10

177

20

409

30

614

40

683

225°F (107°C)

10

392

20

730

Time (Minutes)

Overlap Shear Strength (PSI)

5

844

10

1055

15

1175

20

1165

30

1305

45

1490

60

1455

Typical Performance

Characteristics

(continued)

3M™ Scotch-Weld™ Urethane Adhesive 3535 B/A at 150°F (66°C)

Specimens: 1/2-inch overlap prepared from 1 x 4-inch x 2024 T-3 clad FPL etched

aluminum, .005-inch bondline. Specimens were placed in 150°F (66°C) oven and

cured for specified time. Time to reach 150°F (66°C) was 4 min. Specimens were then

removed and tested at 2-in./min. During testing the specimens were a approximately

125°F (49°C).