WANNATE 3B766A

WANNATE 3B766A is a modified MDI-based isocyanate prepolymer used in polyurethane production, and WANNATE 3B766A is valued for balanced reactivity, low viscosity, and good processing performance in cast elastomer systems.
WANNATE 3B766A is commonly used in cast polyurethane elastomers where controlled pot life and reliable curing with standard chain extenders are required, and WANNATE 3B766A supports production of durable elastomer parts with good mechanical balance.
WANNATE 3B766A is typically supplied as a liquid prepolymer, and WANNATE 3B766A contains reactive isocyanate groups so strict moisture control, ventilation, and PPE are required during handling and processing.

CAS Number: Mixture (MDI-based prepolymer; trade product)
EC Number: Mixture (trade product)
Molecular Formula: Mixture (isocyanate-terminated prepolymer; variable)
Molecular Weight: Mixture (variable)

Synonyms: WANNATE 3B766A, Wannate 3B766A, WANNATE MDI Prepolymer, Modified MDI Prepolymer, MDI Ester Prepolymer, MDI-Based Isocyanate Prepolymer, Cast PU Isocyanate Component, Isocyanate Prepolymer 3B766A, Wanhua Wannate 3B766A, WANNATE 3B Series Isocyanate, Polyurethane Prepolymer Isocyanate, MDI Prepolymer for Elastomers, WANNATE 3B766A, Wannate 3B766A, WANNATE 3B 766A, Wannate 3B 766A, 3B766A, 3B 766A, WANNATE Polyurethane Prepolymer 3B766A, WANNATE PU Prepolymer 3B766A, Polyurethane Prepolymer 3B766A, PU Prepolymer 3B766A, Isocyanate Prepolymer 3B766A, Aromatic Isocyanate Prepolymer 3B766A, Modified Isocyanate Prepolymer 3B766A, Polymeric Isocyanate Prepolymer 3B766A, WANNATE Isocyanate 3B766A, Wannate Isocyanate 3B766A, Isocyanate Resin 3B766A, Polyurethane Resin 3B766A, PU Resin 3B766A, Moisture Curing Polyurethane Prepolymer 3B766A, One Component PU Prepolymer 3B766A, 1K Polyurethane Prepolymer 3B766A, Reactive Polyurethane Prepolymer 3B766A, NCO-Terminated Polyurethane Prepolymer 3B766A, NCO Functional PU Prepolymer 3B766A, Urethane Prepolymer 3B766A, Urethane Resin 3B766A, Polyurethane Binder 3B766A, PU Binder 3B766A, Isocyanate Binder 3B766A, Polyurethane Adhesive Raw Material 3B766A, PU Adhesive Raw Material 3B766A, Polyurethane Sealant Raw Material 3B766A, PU Sealant Raw Material 3B766A, Coating Grade WANNATE 3B766A, Adhesive Grade WANNATE 3B766A, Sealant Grade WANNATE 3B766A, Elastomer Grade WANNATE 3B766A, Industrial WANNATE 3B766A

APPLICATIONS

WANNATE 3B766A is used in cast polyurethane elastomers to manufacture wheels, rollers, and load-bearing components with durable abrasion performance.
WANNATE 3B766A is incorporated into elastomer casting systems to produce pads, bumpers, and vibration-damping parts in compatible designs.
WANNATE 3B766A is used in industrial urethane parts where balanced hardness and flexibility are required.

WANNATE 3B766A is used with 1,4-butanediol (1,4 BDO) chain extension in selected formulations to produce elastomers around the 90+ Shore A hardness range.
WANNATE 3B766A is incorporated into two-component cast systems where predictable pot life supports controlled mold filling and degassing.
WANNATE 3B766A is used in mold casting operations to improve productivity through stable processing behavior and consistent cure.

WANNATE 3B766A is used in polyurethane tooling and prototype parts in selected applications where low viscosity improves detail replication.
WANNATE 3B766A is incorporated into filled elastomer systems where good wetting of fillers supports consistent mechanical properties.
WANNATE 3B766A is used in wear liners and protective elastomer coatings in selected cast-on applications where durable elastomer performance is needed.

WANNATE 3B766A is valued because WANNATE 3B766A provides a practical processing window and reliable elastomer performance for many cast polyurethane applications.

WANNATE 3B766A is used as a specialty polyurethane raw material in elastomer formulations.
WANNATE 3B766A is used in the development of cast polyurethane elastomers.
WANNATE 3B766A helps provide reactive isocyanate functionality for polyurethane network formation.
WANNATE 3B766A is used in two-component polyurethane systems.

WANNATE 3B766A is used in polyurethane adhesive formulations.
WANNATE 3B766A helps improve bonding strength in compatible adhesive systems.
WANNATE 3B766A is used in polyurethane sealant formulations.
WANNATE 3B766A supports elastic sealing performance after curing.

WANNATE 3B766A is used in coating systems requiring polyurethane chemistry.
WANNATE 3B766A helps improve durability and chemical resistance in cured coating films.
WANNATE 3B766A is used in industrial protective coatings.
WANNATE 3B766A supports surface protection for metal, plastic, and composite substrates.

WANNATE 3B766A is used in flexible polyurethane elastomer systems.
WANNATE 3B766A helps create materials with good elasticity and mechanical strength.
WANNATE 3B766A is used in molded polyurethane parts.
WANNATE 3B766A supports production of shaped elastomeric components.

WANNATE 3B766A is used in polyurethane wheel and roller applications.
WANNATE 3B766A helps provide wear resistance and load-bearing performance.
WANNATE 3B766A is used in industrial roller coverings.
WANNATE 3B766A supports abrasion resistance in demanding mechanical environments.

WANNATE 3B766A is used in polyurethane gasket formulations.
WANNATE 3B766A helps produce flexible sealing materials.
WANNATE 3B766A is used in polyurethane pad production.
WANNATE 3B766A supports cushioning, resilience, and impact absorption.

WANNATE 3B766A is used in footwear polyurethane systems.
WANNATE 3B766A helps create durable and flexible shoe components.
WANNATE 3B766A is used in sole and midsole formulation development.
WANNATE 3B766A supports mechanical strength and repeated-flex performance.

WANNATE 3B766A is used in automotive polyurethane components.
WANNATE 3B766A helps produce elastomeric parts with resistance to wear and stress.
WANNATE 3B766A is used in transportation coating and elastomer systems.
WANNATE 3B766A supports durability in components exposed to vibration and mechanical load.

WANNATE 3B766A is used in construction polyurethane formulations.
WANNATE 3B766A helps improve adhesion and elasticity in compatible building materials.
WANNATE 3B766A is used in joint sealant development.
WANNATE 3B766A supports flexible movement accommodation in cured sealants.

WANNATE 3B766A is used in potting and encapsulation materials.
WANNATE 3B766A helps protect components from moisture and mechanical stress.
WANNATE 3B766A is used in electronic polyurethane protection systems.
WANNATE 3B766A supports durable encapsulation in compatible formulations.

WANNATE 3B766A is used in polyurethane composite systems.
WANNATE 3B766A helps bind fillers, fibers, and polymeric components.
WANNATE 3B766A is used in specialty resin modification.
WANNATE 3B766A supports improved toughness and reactive curing behavior.

WANNATE 3B766A is used in research and development of polyurethane materials.
WANNATE 3B766A helps evaluate curing response, hardness, elasticity, and compatibility.
WANNATE 3B766A is used in formulation laboratories for CASE applications.

DESCRIPTION

WANNATE 3B766A is an isocyanate-terminated prepolymer based on modified MDI chemistry, and WANNATE 3B766A cures by reacting with polyols or chain extenders to form polyurethane and polyurea-type linkages depending on the curative.
WANNATE 3B766A is designed to provide balanced reactivity, and this helps maintain workable pot life while achieving strong final properties after cure.
WANNATE 3B766A is sensitive to moisture, and moisture exposure can cause CO₂ generation, bubbles, viscosity increase, and loss of NCO content, so dry processing is essential.

WANNATE 3B766A handling requires strict exposure control because isocyanates can cause respiratory sensitization and skin sensitization, and repeated exposure can lead to allergic reactions.
WANNATE 3B766A should be processed with controlled temperature, and prepolymer temperature affects viscosity, mixing efficiency, and reaction rate.
WANNATE 3B766A should be used according to applicable regulations and workplace safety requirements for the target market and facility.

WANNATE 3B766A is a commercial polyurethane raw material grade.
WANNATE 3B766A is associated with WANNATE specialty isocyanate and polyurethane chemistry.
WANNATE 3B766A is generally used as a reactive component in polyurethane systems.
WANNATE 3B766A is selected for applications requiring controlled curing and durable polymer formation.

WANNATE 3B766A may be supplied as a liquid or prepolymer-type material depending on grade specification.
WANNATE 3B766A contains reactive groups suitable for polyurethane-forming reactions.
WANNATE 3B766A reacts with polyols, chain extenders, or other active-hydrogen compounds.
WANNATE 3B766A can form tough elastomeric networks after curing.

WANNATE 3B766A performance depends on NCO content, viscosity, functionality, and formulation balance.
WANNATE 3B766A performance also depends on polyol selection, catalyst system, temperature, and mixing conditions.
WANNATE 3B766A can contribute strength, elasticity, abrasion resistance, and chemical resistance.
WANNATE 3B766A is useful in polyurethane elastomers, coatings, adhesives, sealants, and encapsulation systems.

WANNATE 3B766A should be stored in tightly closed containers.
WANNATE 3B766A should be protected from moisture because isocyanate-containing materials can react with water.
WANNATE 3B766A should be protected from excessive heat and incompatible materials.
WANNATE 3B766A should be handled with suitable ventilation and protective equipment.

WANNATE 3B766A may cause irritation or sensitization depending on exposure conditions.
WANNATE 3B766A should be used according to the supplier safety data sheet and technical data sheet.
WANNATE 3B766A quality may be defined by viscosity, NCO content, color, acidity, and moisture level.
WANNATE 3B766A should be tested in the target formulation before commercial use.

WANNATE 3B766A is important in specialty polyurethane formulation development.
WANNATE 3B766A is valued for supporting durable cured properties in reactive polymer systems.
WANNATE 3B766A helps formulators balance processing behavior and final material performance.
WANNATE 3B766A supports applications requiring reliable polyurethane reactivity and robust mechanical properties.

PROPERTIES

Common Name: WANNATE 3B766A
Chemical Type: Modified MDI-based isocyanate-terminated prepolymer; polyurethane intermediate
Appearance: Clear to pale yellow liquid (typical)
Odor: Mild characteristic isocyanate odor
Solubility: Insoluble in water; reacts with water; compatible with many polyurethane formulation components
Viscosity: Low to moderate (grade dependent; temperature dependent)
Reactivity: Reacts with polyols, chain extenders, and moisture; cure behavior depends on curative and catalysts
Moisture Sensitivity: High; keep dry to maintain NCO content and avoid foaming
Stability: Stable under dry, sealed storage; avoid heat, moisture, and contamination
Storage Temperature: 15–30°C, tightly closed, dry, protect from humidity
Shelf Life: Typically 6–12 months in original sealed packaging (supplier dependent)

FIRST AID

Inhalation:
Move to fresh air immediately.
Seek medical attention if coughing, wheezing, chest tightness, or breathing difficulty occurs.
If symptoms persist, seek urgent medical care because sensitization is possible.

Skin Contact:
Remove contaminated clothing and wash skin thoroughly with soap and water.
Seek medical advice if irritation develops or if sensitization symptoms appear.
Do not use solvents to clean skin.

Eye Contact:
Rinse cautiously with water for at least 15 minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek immediate medical attention.

Ingestion:
Rinse mouth with water and do not induce vomiting.
Seek immediate medical attention or contact a poison center.
Never give anything by mouth to an unconscious person.

Note to Physicians:
Treat symptomatically.
Monitor for respiratory sensitization and bronchospasm.
Provide supportive care as needed.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including chemical-resistant gloves, goggles or face shield, and protective clothing.
Avoid breathing vapors or aerosols and avoid skin contact because isocyanates can sensitize.
Use dry, closed transfer where possible and keep containers sealed when not in use.

Ventilation:
Use local exhaust ventilation at mixing and pouring points.
Avoid handling in confined spaces without adequate airflow.
Use appropriate respiratory protection where required by exposure assessment.

Storage:
Store in tightly closed containers in a cool, dry, well-ventilated area.
Protect from moisture ingress to prevent foaming, viscosity increase, and loss of NCO content.
Keep away from strong bases, amines, alcohols, and water sources unless used in controlled reaction processes.

Spill and Leak Procedures:
Ventilate area and restrict access.
Absorb with inert material and decontaminate using an appropriate isocyanate neutralization procedure per facility rules.
Prevent release to drains and dispose of waste according to local regulations and facility procedures.

Handling Precautions:
Control moisture and cleanliness because small contamination can cause foaming and unstable processing in cast polyurethane systems.
Control temperature because viscosity and reaction rate change strongly with temperature and affect pot life and mold filling.
Use trained procedures for isocyanate handling to minimize sensitization risk and maintain safe operations.