High Transparency Vacuum Casting Transparent PC
|Composition||ISOCYANATE PX 5210||POLYOLPX 5212||MIXING|
|Mixing ratio by weight||100||50|
|Viscosity at 25°C (mPa.s)||BROOKFIELD LVT||200||800||500|
|Density at 25°C||(g/cm3)||ISO 1675 : 1985ISO 2781 : 1996||1,07-||1,05||1,06|
|Density of the cure product at 23°C|
|Pot life at 25°C on 150g (min)||Gel Timer TECAM||8|
The PX 5212 must be only used in a vacuum casting machine and cast in a pre-heated silicone mould. The respect of 70°C temperature for the mould is imperative.
Vacuum casting machine utilisation:
• Heat both parts at 20 / 25°C in case of storage at a lower temperature.
• Weigh isocyanate in the upper cup (do not forget to allow for residual cup waste).
• Weigh polyol in the lower cup (mixing cup).
• After degassing for 10 minutes under vacuum pour isocyanate in polyol and mix for 4 minutes.
• Cast in the silicone mould, previously heated at 70°C.
• Put in an oven at 70°C.
1hour for 3 mm thickness
Open the mould, cooling the part with compressed air.
Remove the part.
Post curing treatment is needed to get final properties (after demoulding) 2h at 70°C + 3h at 80°C+ 2h at 100°C
Use a fixture to handle the part during the post curing treatment
NOTA: Elastic memory material offset any deformation observed during demoulding.
It is important to cast the PX 5212 in a new mould without casting resin previously inside.
|Hardness||ISO 868 : 2003||Shore D1||85|
|Tensile modulus of elasticity||ISO 527 : 1993||MPa||2,400|
|Tensile strength||ISO 527 : 1993||MPa||66|
|Elongation at break in tension||ISO 527 : 1993||%||7.5|
|Flexural modulus of elasticity||ISO 178 : 2001||MPa||2,400|
|Flexural strength||ISO 178 : 2001||MPa||110|
|Choc impact strength (CHARPY)||ISO 179/1eU : 1994||kJ/m2||48|
|Glass transition temperature (Tg)||ISO 11359-2 : 1999||°C||95|
|Coefficient og light transmission||LNE||%||89|
|Heat deflection temperature||ISO 75 : 2004||°C||85|
|Maximal casting thickness||-||mm||10|
|Time before demoulding at 70°C (3mm)||-||min||60|
Shelf life of both parts is 12 months in a dry place and in their original unopened containers at a temperature between 10 and 20°C. Avoid storage for long time at a temperature over 25°C.
Any open can must be tightly closed under dry nitrogen.
Normal health and safety precautions should be observed when handling these products :
Ensure good ventilation
Wear gloves, safety glasses and waterproof clothes
For further information, please consult the product safety data sheet.