C. High Molecular weight PVB
| Grade |
Butyral
wt% |
Hydroxyl
wt% |
Acetyl
wt% |
Viscosity
cps |
Free Acid
wt% |
Volatile
wt% |
| 8223 |
----- |
18.5~20.5 |
<2 |
60~150 1 |
<0.05 |
<3 |
| B91FC |
----- |
18.0~19.5 |
<2 |
60~150 1 |
<0.02 |
<2 |
| B91FB |
----- |
20.0~21.5 |
<2 |
60~150 1 |
<0.02 |
<2 |
| B91FS |
----- |
18.0~19.0 |
<2 |
60~150 1 |
<0.02 |
<2 |
| Remark: Measurement of Viscosity |
1 Solution Viscosity was determined in 5% by weight in 95% ethanol, at 20℃, using Brookfield viscometer.
2 Solution Viscosity was determined in 10% by weight in at 20℃, toluene/ethanol 1/1, using Brookfield viscometer.
3 Solution Viscosity was determined in 5% by weight in toluene/ethanol 1/1, at 20℃, using Brookfield viscometer.
Major applications: - Copper foil laminates: Binder for copper foil and Epoxy laminates
- Printed circuit board bonding adhesives
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