Butvar® B-74 by Eastman is a free-flowing polyvinyl butyral (PVB) thermoplastic powdered grade. Retains clarity of the coating and offers reactive hydroxyl sites for crosslinking with thermoset systems. Imparts good adhesion, toughness and flexibility. Butvar® B-74 is recommended for binders and structural adhesives and wire enamel overcoats.
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Butvar® B-74 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 |