PLEASE NOTE: since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required courses.
Companies can register for online training via THIS link.
You can also read more information here.
Polytek PT Flex 50 Flexible Polyurethane
Polytek's polyurethane casting resin is of high quality.
This is a 2-component polyurethane that quickly hardens into a sturdy rubber. This polyurethane rubber is perfect for molding decorative pieces, production parts, tools, models, etc.
Due to the somewhat bright yellow/amber color, this polyurethane can be easily colored with polyurethane dyes.
Processing
The model or mold in which PT Flex 50 is processed must not be porous and must not contain sulphur. So be careful with (dried) clay, etc. If the model is porous or contains sulfur, it is best to seal it with shellac or another good sealing sealer. If the product is only porous, PVA or normal paints will also suffice.
After applying a pore filler or lacquer, a release agent must also be applied. This is especially necessary on Shellac. But a release agent must also be applied to unsealed products. Preferably a release spray .
Test thoroughly whether the mold or shape (after sealing and release agent) does indeed go together with this polyurethane.
Make sure component A and component B are both at room temperature (20-25°C) and the ambient temperature above 16 ° C, during the entire process including curing time.
Stir the B-component in the packaging beforehand.
Mix with a spatula in a clean mixing bowl, as mechanical mixing can create a lot of air. Carefully scrape sides of mixing bowl while stirring.
Pour as soon as possible after stirring. DO NOT scrape sides of pitcher while pouring.
Let the product harden at room temperature and de-mould after the de-mould time. Final properties are reached after 7 days, as with most room temperature polyurethanes.
To clean
Wipe tools before the product has hardened. Use ethanol as a solvent, but be aware of flammability. Wax surfaces to keep workspaces clean.
Properties
- Mixing ratio: A:B = 1:1 in weight (e.g. 100 gram A with 100 gram B)
- Hardness: 50 Shore A
- Pouring time, 250 grams: 4 minutes mix (min)
- Demould time at 25°C: 2 hours
- Demolding time at 70 ° C: 30 minutes
- Specific gravity: 1.04 grams/cm³
- Cured color: Yellow/Amber cloudy transparent
- Initial Mixed Viscosity @20oC: 600 cSt
- Specific volume: 0.96 cm³/g
- Shrinkage on curing: 0.2% (Highly temperature dependent)
- Tensile strength: 1.96 N/mm²
- Elongation: 242%
- Tear strength: 10.0 N/mm
shelf life
This product has a shelf life of at least 6 months with proper storage. Store in tightly sealed containers free of moisture (preferably covered with an inert gas) in a dark location between 15-32oC .
Safety regulations
Polytek PT Flex 50 A component
H-Code hazard statements
H315 Causes skin irritation.
H317 May cause an allergic skin reaction.
H319 Causes serious eye irritation.
H332 Harmful if inhaled.
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled.
H335 May cause respiratory irritation.
H351 Suspected of causing cancer.
H373 May cause damage to organs (lungs and respiratory system) through prolonged or repeated exposure.
P-Code Precautions
Prevention:
P202 Do not handle until all safety precautions have been read and understood.
P260 Do not breathe vapors or mist.
P280 Wear protective gloves, protective clothing, eye protection and face protection.
P284 Wear respiratory protection in case of insufficient ventilation.
Action:
P302 + 352 IF ON SKIN: Wash with plenty of soap and water.
P304 + 340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P305 + 351 + 338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Keep rinsing.
P308 + 313 IF exposed or concerned: Get medical advice/attention.
P403 + 233 Store in a well-ventilated place. Keep container tightly closed.
P501 Dispose of contents and container in accordance with local, regional, and national regulations
Polytek PT Flex 50 B component
H-Code hazard statements
H317 May cause an allergic skin reaction.
H401/411 Toxic to aquatic life with long lasting effects.
P-Code Precautions
261 Avoid breathing vapour/spray.
P272 Contaminated work clothing should not be allowed to leave the work area.
P273 Avoid release to the environment.
P280 Wear protective gloves and eye protection.
Action:
P302 + P352 IF ON SKIN: Wash with plenty of soap and water.
P333 + P313 If skin irritation or rash occurs: Get medical advice/attention.
P391 Collect spilled material.
P501 Dispose of contents and container in accordance with local, regional, and national regulations.
- Always work in a well-ventilated area. Use an organic gas mask in less well-ventilated areas or with larger quantities or with frequent use.
- Use liquid-tight nitrile gloves and splash goggles.
- Do not smoke or eat while using and handling this product.
- Wash hands well after use.
- For large quantities also wear an apron or overall.
- In case of contact with skin, wash thoroughly with soap
- In case of contact with eyes, rinse immediately with plenty of water for several minutes.
- If symptoms persist, consult a doctor and take the safety data sheet with you!
EN - Product Information Polytek PT Flex 50 flexible polyurethane.pdf
EN - Product information PT Flex 50
EN- Safety Data Sheet PTFLEX A
EN - Safety Data Sheet PTFLEX B
