| About |
|---|
| SELVOL™ E 523 is a medium viscosity partially hydrolysed polyvinyl alcohol which finds applications principally in the Adhesives, Paper and Textile industries. Adhesives: PVAc emulsions for wood,paper, packaging and building ; Remoistenables. Paper: Surface sizing; Antigrease treatment. Textiles: Spun yarn sizing / Synthetic; Filament yarn sizing; Finishing; Printing. Others: Cement mortars (fine powder product); Gypsum boards (fine powder product); Ceramics binder and coating; Protective strip coatings; Mould release polyester / silicone; PVC Polymerisation; Water soluble films&& |
| Product Description | |
|---|---|
| Supplier | Sekisui |
| Generic | PVOH |
| Material Status | Commercial: Active |
| Availabilitys | Africa & Middle East ,North America,Latin America,Asia Pacific,Europe |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.27 to 1.31 | g/cm³ | |
| PH value | |||
| Of a 4% aqueous solution | 4.5 to 6.5 | Internal Method | |
| VOC Content | < 1.0 | wt% | Internal Method |
| Ash Content | |||
| Sodium oxide | < 0.5 | % | Internal Method |
| 粘度 – Of a 4% aqueous solution at 20ºC 3 | 23 to 27 | mPa·s | Brookfield |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Glass transition temperature | 58.0 | ℃ | |
| Melting temperature | 180 | ℃ | |
| Linear coefficient of thermal expansion | |||
| MD：0~45℃ | 7.0E-5 to 1.0E-4 | 1/℃ | |
| specific heat | 1650 to 1670 | J/kg/℃ | |
| Thermal conductivity coefficient | 2.0 | W/m/K |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Volume resistivity | 3.1E+7 to 3.8E+7 | ohms·cm |
| optical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Refractive index | |||
| nD^20℃ | 1.5200 to 1.5500 |
| Supplementary information | Nominal value | Unit | Test method |
|---|---|---|---|
| Degree of Hydrolysis | 87.0 to 89.0 | mol% | Internal Method |
| Methanol Content | < 0.9 | wt% | Internal Method |
| Photostability | Excellent | ||
| volatility | < 5.0 | wt% | Internal Method |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. International Reference: ISO 976 |
| 3. International Reference: ISO 2555 |
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