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PT Flex 97 Flexible Polyurethane
Polytek's polyurethane casting resin is of high quality.
This is a 2 component polyurethane that cures quickly to a very strong rubber. This polyurethane rubber has a high wear resistance and strength. This variant is perfect for casting decorative pieces, production parts, tools etc.
The slightly bright yellow/amber color makes this polyurethane easy to color with polyurethane dyes.
Processing
This PU can be processed manually and is also very suitable for dosing syringes/dispensers .
The model or mold in which PT Flex 97 is processed may not be porous and contain no 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 well-sealing sealer. If the product is only porous, PVA or ordinary lacquers will 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 .
Silicone molds usually do not need a release agent
Test carefully whether the mold or mold (after sealing and release agent) does indeed go together with this polyurethane.
Ensure component A and B component are both at room temperature (20-25°C) and ambient temperature above 16 ° C throughout the process including curing time.
Stir/ homogonize the components in the package first.
Mix with a spatula in a clean mixing bowl, as machine mixing can trap 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 as these might contain badly mixed material.
Allow the product to harden at room temperature and de-mould after the de-molding time. As with most room temperature polyurethanes, the final properties are reached after 7 days.
Cleaning
Wipe tools before product has cured. Use ethanol as a solvent, but watch out for flammability. Wax surfaces to easily keep workspace clean.
Properties
- Mixing ratio: A:B = 1:1 by weight (e.g. 100 grams A with 100 grams B)
- Hardness: 95-97 Shore A
- Pouring time, 250 grams: 4 minutes
- Demoulding time at 25°C: 1 hour
- Specific gravity: 1.02-1.07 grams/cm³
- Cured color: Yellow/Amber cloudy clear
- Initial Mixed Viscosity @ 20 o C: 600-900 cSt
- Shrinkage on curing: 0.16% (High temperature dependent)
- Tensile strength: 9-10 N/mm²
- Elongation: 340-400%
- Tear strength: 65-75 N/mm
- Linear Shrinkage: <0,2%
Shelf life
This product has a shelf life of at least 6 months with proper storage. Store in tightly closed containers without moisture (preferably covered with an inert gas) in a dark location between 15-32 o C.
Safety regulations
Polytek PT Flex 97 A component
H-Code Hazard Statements
H315 Causes skin irritation.
H317 May cause an allergic skin reaction.
H319 Causes serious eye irritation.
H332 Harmful by inhalation.
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 mists.
P280 Wear protective gloves, protective clothing, eye protection and face protection.
P284 In case of insufficient ventilation, wear respiratory protection.
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 (possible): 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, state and national regulations
Polytek PT Flex 97 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 clothes 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 spillage.
P501 Dispose of contents and container in accordance with local, state and national regulations.
- Always work in a well-ventilated area. Use an organic gas mask in less well-ventilated areas or in 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 everywhere.
- In case of contact with skin, wash very thoroughly with soap
- In case of contact with eyes, rinse immediately with plenty of water (several minutes).
- In case of persistent complaints, consult a doctor and bring the safety data sheet with you!
EN - Product Information PT Flex 97 Flexible Polyurethane.pdf
EN- Safety Data Sheet PTFLEX 97 A
EN - Safety Data Sheet PTFLEX 97 B
