Quick Search
WANNATE 3T8240 provides a balanced reactivity profile with strong structural control.
WANNATE 3T8240 helps maintain foam stability during expansion and curing.
WANNATE 3T8240 supports consistent quality in both standard and complex polyurethane systems.
Synonyms: WANNATE 3T8240, Balanced-reactivity TDI system, Structural-control isocyanate, Polyurethane reactive component, Modified TDI blend, Wanhua TDI derivative, Flexible foam isocyanate, Industrial PU raw material, Controlled-expansion isocyanate, Polyurethane system component
WANNATE 3T8255 is a raw material that stands out with its low viscosity, pot life of up to 8 minutes, and good flexibility properties.
WANNATE 3T8240 is a high-performance, polyether-based TDI prepolymer designed for casting polyurethane elastomers that require a balance of high resilience and physical toughness.
Based on a PTMEG (polytetramethylene ether glycol) backbone, WANNATE 3T8240 offers superior hydrolysis resistance and low-temperature flexibility compared to polyester alternatives, making it ideal for components exposed to moisture or extreme environments.
When cured with MOCA, WANNATE 3T8240 typically yields a material in the 80A to 95A Shore hardness range, characterized by excellent abrasion resistance and high load-bearing capacity.
WANNATE 3T8240's controlled NCO content (approx. 8.3%) and stable viscosity at processing temperatures allow for consistent mold filling and reliable mechanical properties in demanding industrial applications like mining screens, heavy-duty wheels, and oilfield seals.
WANNATE 3T8255 is a polyester -based, TDI terminated urethane prepolymer that is solid at room temperature.
When cured with MOCA or DMTDA, this high performance material yields outstanding properities.
WANNATE 3T8255 elastomers are characterized by:
Excellent flex life
Excellent abrasion resistance
Good resistant to oils
Excellent tensile strength
Uses of WANNATE 3T8240:
WANNATE 3T8240 is a high-performance, polyether-based TDI prepolymer designed for casting polyurethane elastomers that require a balance of high resilience and physical toughness.
Based on a PTMEG backbone, WANNATE 3T8240 offers superior hydrolysis resistance and low-temperature flexibility compared to polyester alternatives, making it ideal for components exposed to moisture or extreme environments.
When cured with MOCA, WANNATE 3T8240 typically yields a material in the 80A to 95A Shore hardness range, characterized by excellent abrasion resistance and high load-bearing capacity.
WANNATE 3T8240's controlled NCO content and stable viscosity at processing temperatures allow for consistent mold filling and reliable mechanical properties in demanding industrial applications like mining screens, heavy-duty wheels, and oilfield seals.
Stability and Reactivity of WANNATE 3T8240:
Stability:
Stable under recommended storage.
Avoid:
Temperatures >50°C.
Moisture.
Incompatibility:
Reacts exothermically with water.
Alcohols.
Amines.
Acids.
Bases.
Hazard:
Contact with water releases CO₂.
Causing pressure buildup in closed containers.
Handling and Storage of WANNATE 3T8240:
Storage:
Keep in a cool, dry, well-ventilated area.
Under a nitrogen blanket.
Temperature:
Maintain between 20°C–35°C.
If frozen, heat gently and uniformly.
Handling:
Use local exhaust ventilation.
Use non-sparking tools.
First Aid Measures of WANNATE 3T8240:
Inhalation:
Move to fresh air.
Seek medical help (risk of delayed pulmonary edema).
Skin:
Remove contaminated clothes.
Wash with soap and water or isocyanate decontaminant.
Eyes:
Flush with lukewarm water for 15+ minutes.
Consult an ophthalmologist.
Ingestion:
Do not induce vomiting.
Rinse mouth.
Seek immediate medical aid.
Firefighting Measures of WANNATE 3T8240:
Extinguishers:
Dry chemical.
CO₂.
Alcohol-resistant foam.
Hazards:
May release toxic gases (NOₓ.
HCN.
TDI vapors) during combustion.
Action:
Firefighters must wear SCBA.
Cool sealed containers with water spray.
Accidental Release Measures of WANNATE 3T8240:
Containment:
Evacuate area.
Absorb spill with sand or earth.
Decontamination:
Treat area with a solution of:
90% water.
8% ammonia.
2% detergent.
Disposal:
Leave in open containers for 48 hours.
Before sealing to allow gas escape.
Exposure Controls / Personal Protective of WANNATE 3T8240:
Respiratory:
Use organic vapor or supplied-air respirators if heating or ventilation is poor.
Eyes/Hands:
Wear chemical-resistant gloves (Nitrile/Butyl).
Full-face shield.
Body:
Wear chemical-resistant coveralls or aprons.
Prevent skin contact.
Identifiers of WANNATE 3T8240:
Chemical Type: Modified TDI system
CAS Number: Mixture
EC Number: Not assigned
Properties of WANNATE 3T8240:
Appearance: Light yellow to slightly amber liquid
Odor: Characteristic isocyanate odor
Density: ~1.22–1.25 g/cm³
Viscosity: Low to medium
Reactivity: Balanced (neither too fast nor delayed)
Processing behavior: Stable expansion with reduced deformation tendency
Hardness/Shore A: 95±2
100% Modulus/MPa: 12.7
300% Modulus/MPa: 30.0
Tensile Strength/MPa: 57.9
Elongation at Break/%: 460
Tear Strength, Die C pli/( KN/m): 117
Rebound(23°C)/%: 38
Din abrasion/mm3: 33
Specifications of WANNATE 3T8240:
NCO, %: 5.3-5.7
Appearance @ 25°C: Solid free from contamination
Brookfield Viscosity@80°C，mPa·s: 500-700
