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Baydur® 646 (30 pcf)
| Category: | PUR-MDI , Polyurethane (MDI) |
| Manufacturer: | Covestro - PUR |
| Trademark: | Baydur® |
| Fillers: | - |
| Ports: | Qinzhou, Shekou, Shanghai, Ningbo |
| Delivery Terms | FOB, CIF, DAP, DAT, DDP |
| PDF: | FOXBhp_Baydur-646-30-pcf-.pdf  |
| PRICE: | Order Products email sales@su-jiao.com |
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Baydur 646 is a rigid polyurethane structural foam system used in the reaction injection molding (RIM) process. The system is supplied as two reactive liquid components: Component A is a polymeric diphenylmethane diisocyanate (PMDI), and Component B is a formulated polyol system containing no CFC- or HCFC-blowing additives. The Baydur 646 system is used to produce foam cores for composite applications, such as water skis, wake boards, snow boards, and various components for the transportation and marine markets. As with any product, use of the Baydur 646 system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability. |
| General Information | |
|---|---|
| Uses |
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| Processing Method |
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| Physical | Nominal Value | Unit | Test Method |
|---|---|---|---|
| Specific Gravity | 0.479 | g/cm³ | ASTM D792 |
| Molding Shrinkage - Flow (6.35 mm) | 0.30 - 0.50 | % | ASTM D955 |
| Hardness | Nominal Value | Unit | Test Method |
|---|---|---|---|
| Durometer Hardness | ASTM D2240 | ||
| Shaw D, 6.35mm | 55 | ASTM D2240 | |
| Shaw D, 12.7mm | 55 | ASTM D2240 |
| Mechanical | Nominal Value | Unit | Test Method |
|---|---|---|---|
| Tensile Strength | ASTM D638 | ||
| Fracture, 6.35mm | 12.0 | MPa | ASTM D638 |
| Fracture, 12.7mm | 10.3 | MPa | ASTM D638 |
| Tensile Elongation | ASTM D638 | ||
| Fracture, 6.35mm | 7.0 | % | ASTM D638 |
| Fracture, 12.7mm | 9.0 | % | ASTM D638 |
| Flexural Modulus | ASTM D790 | ||
| 6.35 mm | 572 | MPa | ASTM D790 |
| 12.7 mm | 517 | MPa | ASTM D790 |
| Flexural Strength | ASTM D790 | ||
| 6.35 mm | 16.5 | MPa | ASTM D790 |
| 12.7 mm | 20.0 | MPa | ASTM D790 |
| Compressive Strength | ASTM D695 | ||
| 6.35 mm | 10.3 | MPa | ASTM D695 |
| 12.7 mm | 10.3 | MPa | ASTM D695 |
| Impact | Nominal Value | Unit | Test Method |
|---|---|---|---|
| Charpy Unnotched Impact Strength | Internal method | ||
| -- 1 | 9.0 | kJ/m² | Internal method |
| -- 2 | 8.8 | kJ/m² | Internal method |
| Thermoset | Nominal Value | ||
|---|---|---|---|
| Thermoset Components | |||
| Component a | Mixing ratio by weight: 110 | ||
| Component B | Mixing ratio by weight: 100 |
| Additional Information |
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| Part A Type: Isocyanate Appearance: Dark brown to black liquid Specific Gravity @ 25°C: 1.24 Viscosity @25°C: 200 cps Flash Point PMCC: 199°C NCO: 31.5 wt% Part B Type: Polyol Appearance: Amber liquid Specific Gravity @ 25°C: 1.08 Viscosity @25°C: 1200 cps Flash Point PMCC: 123°C Water: 1.05 wt% Hydroxyl Number: 370 KOH/g Material Temperatures: 29 to 38°CMold Temperature: 50 to 60°CHand Mix Reactivity at 25°C Cream Time: 30 to 40 sec Gel Time: 65 to 75 sec Tack Free Time: 77 to 85 sec Free-Rise Density: 5 to 7 lb/ft³ Machine Reactivity at 30°C Cream Time: 10 to 20 sec Gel Time: 30 to 40 sec Tack Free Time: 50 to 60 sec Free-Rise Density: 5 to 7 lb/ft³ Polyol Nucleation Specific Gravity: 0.8 to 0.9 0Typical cure Time, 0.500 in Thickness: 4 to 5 secMolded Density: 10 to 30 lb/ft³ |
| Note Message | |
|---|---|
| 1 . | 0.5 |
| 2 . | 0.25 in |
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