GY-PVB-40 聚乙烯醇縮丁醛
描述
| Grade | GY-PVB-40 |
| Vinyl Butyral, wt % | 76-82 |
| Vinyl hydroxyl , wt % | 18.0-21.0 |
| Vinyl acetate | < 3 |
| Viscosity, cps | 35-60 |
| Free Acid | < 0.05 |
| Volatile, wt % | < 3 |
| Specific Gravity | 1.1 |
| Bulk Density g/cm3 (Powder) | 0.25-0.40 |
| Glass transition ca. | 62℃ |
| Melting point ℃ | 135-170 |
| Melecular weight g/mole | 25,000-35,000 |
| Degree of polymerization | 400-500 |