Butvar® B-72 by Eastman is a free-flowing polyvinyl butyral (PVB) thermoplastic powder grade. It exhibits good adhesion, toughness and flexibility. It retains clarity of the coating used for wood and metal substrates and offers reactive hydroxyl sites for crosslinking with thermoset systems. Butvar® B-72 is used in binders and structural adhesives, structural composites and laminates.
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Butvar® B-72 properties
Flammability properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Auto-ignition Temperature | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Burning Rate | 0.0 Visible After Login | Visible After Login | Visible After Login |
Other properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Density, Bulk | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Hydroxyl Content | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Molecular Weight, Mw | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Viscosity | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Volatile Content | 0.0 Visible After Login | Visible After Login | Visible After Login |
Others properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Dust Deflagration Index (Kst) | 0.0 Visible After Login | Visible After Login | Visible After Login |
Physical properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Acetate Content | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Butyryl Content | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Minimum Ignition Energy | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Specific Gravity | 0.0 Visible After Login | Visible After Login | Visible After Login |
Thermal properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Glass Transition Temperature (Tg) | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Melting Point | 0.0 Visible After Login | Visible After Login | Visible After Login |