Best Material Vacuum Casting PMMA

Short Description:

Used by casting in silicone moulds for making transparent prototype parts  until  10 mm thickness : headlights, glazier, any parts which have the same properties as PMMA, cristal PS, MABS…

• High transparency

• Easy polishing

• High reproduction accuracy

• Good UV resistance

• Easy processing

• Fast demoulding


Product Detail

Product Tags

Composition ISOCYANATE PX 521HT A POLYOL   PX 522HT B MIXING
Mixing ratio by weight 100 55
Aspect liquid liquid liquid
Colour transparent bluish transparent*
Viscosity at 25°C                         (mPa.s) Brookfield LVT 200 1,100 500
Density of parts before mixingDensity of the cured product ISO 1675: 1985ISO 2781: 1996 1.07- 1.05- -1.06
Pot life at 25°C on 155g                   (min) - 5 - 7

*PX 522 is available in orange ( PX 522HT OE Part B) and in red (PX 522HT RD Part B)

Vacuum Casting Processing Conditions

• Use in a vacuum casting machine.

• Heat the mould at 70°C (preferably polyaddition silicon mould).

• Heat both parts at 20°C in case of storage at a lower temperature.

• Weigh part A in the upper cup (do not forget to allow for residual cup waste).

• Weigh part B in the lower cup (mixing cup).

• After degasing for 10 minutes under vacuum pour part A in part B and mix for 1 minute 30 to 2 minutes.

• Cast in the silicone mould, previously heated at 70°C.

• Put in an oven at 70°C minimum.

• Demould after 45 minutes at 70°C.

• Carry out the following thermal treatment : 3 hr at 70°C + 2 hr at 80°C and 2hr at 100°C.

• Always while curing, place the part on stand.

Handling Precautions

Normal health and safety precautions should be observed when handling these products :

• ensure good ventilation

• wear gloves and safety glasses

For further information, please consult the product safety data sheet.

Flexural modulus ISO 178 : 2001 MPa 2.100
Flexural strength ISO 178 : 2001 MPa 105
Tensile modulus ISO 527 : 1993 MPa 2.700
Tensile strength ISO 527 : 1993 MPa 75
Elongation at break in tension ISO 527: 1993 % 9
Charpy impact strength ISO 179/1 eU : 1994 kJ/m2 27
Final hardness ISO 868 : 2003 Shore D1 87
Glass temperature transition (Tg) ISO 11359  : 2002 °C 110
Heat deflection temperature ( HDT 1.8 MPa) ISO 75 Ae :1993 °C 100
Maximal casting thickness   mm 10
Demoulding time at 70°C (thickness 3 mm)   min. 45

Shelf life of both parts is 12 months in a dry place and in their original unopened containers at a temperature between 15 and 25°C.

Any open can must be tightly closed under dry nitrogen.


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