3M™ Scotch-Weld™ 7271 B/A

Model

Series

Fire Sealant

Product Description

3M™ Scotch-Weld™ 7271 B/A

3M™ Scotch-Weld™ Hybrid Adhesive SW7271 is a two-part, 1:1 mix ratio, epoxy/acrylate structural adhesive with a 15 minute work life. It exhibits excellent shear and tensile strengths along with high temperature performance and durability on little or non-prepared surfaces, e.g. aluminum and reinforced polyester and epoxy laminates.

Typical Uncured Physical Properties

Property	Accelerator(Part A)	Base(Part B)
Chemical Type	mod. Amine	mod. Epoxy
Color	Blue	Yellow
Density(g/cm3)	1.04	1.35
Viscosity mPas	1.04	1.35
Mix Ratio(Volume)	1	1
Mix Ratio(Weight)	1	1.3
Worklife at 23°C	22 Minutes
Glass beads for bond line control	Yes, diameter 180-300μm
Time to Handling Strength(0.35MPa at 23°C)	60 Minutes
Full Cure time (at 23°C)	2 days @ 23°C

Typical Cured Physical Properties

Color	Green
Tg (°C) by DMTA	59.0
onset point by DMTA	45.6
Shore D Hardness	78
Stress at peak load(MPa)	2.7
Young’s modulus(MPa)	38.8
G modulus(MPa)	2360
Elastic region(%)	230
Poisson ratio	1.0-0.4
Temperature range	-40°C to 120°C