Description

Poly(Oxy-1,2-Ethanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,3-Diisocyanatomethylbenzene And 1,1-Methylenebis4-Isocyanatobenzene CAS NO 83437-95-0 is a specialized polyurethane prepolymer derived from polyethylene glycol (PEG) and a blend of aromatic diisocyanates. This engineered polymer is valued for its ability to impart flexibility, adhesion, and moisture resistance in high-performance formulations. It is essential for manufacturers in the adhesives, sealants, coatings, and elastomers industries seeking to enhance product durability and performance under demanding conditions.

Application

• High-Performance Adhesives & Sealants: Serves as a key prepolymer in the formulation of flexible polyurethane adhesives for automotive, construction, and packaging applications.
• Elastomers and Castable Urethanes: Used to produce tough, abrasion-resistant elastomeric parts, rollers, and gaskets with excellent mechanical properties.
• Protective & Decorative Coatings: A vital component in coatings for textiles, industrial floors, and concrete, providing enhanced chemical and water resistance.
• Potting and Encapsulation Compounds: Employed in electronics and electrical applications to protect sensitive components from moisture and mechanical stress.
• Binder Systems: Acts as a reactive binder in composite materials, foundry sands, and abrasive tools.
• Footwear and Apparel: Utilized in the production of durable, flexible soles and waterproof breathable membranes.

Basic Information

Product Name	Poly(Oxy-1,2-Ethanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,3-Diisocyanatomethylbenzene And 1,1-Methylenebis4-Isocyanatobenzene
CAS No.	83437-95-0
Molecular Formula	Contact for details
Molecular Weight	Varies by grade
Synonyms	Polyethylene Glycol Toluene Diisocyanate (TDI)/Methylene Diphenyl Diisocyanate (MDI) Copolymer; PEG-TDI/MDI Prepolymer; Polyurethane Prepolymer based on PEG and Aromatic Diisocyanates; Polyoxyethylene diol, polymer with 1,3-diisocyanatomethylbenzene and 1,1'-methylenebis(4-isocyanatobenzene); Polyether Polyurethane Prepolymer; Aromatic Polyether Urethane Prepolymer; Hydroxyl-terminated Polyethylene Glycol Urethane Prepolymer; CAS 83437-95-0
EINECS	Contact for details

Quality Control

Our polyurethane prepolymer is manufactured under strict process controls to ensure batch-to-batch consistency and performance reliability. Quality is verified through a suite of analytical tests including NCO content, viscosity, hydroxyl value, and moisture analysis. Certificates of Analysis (COA) documenting all key parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed, moisture-proof container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures recommended for the specific grade (typically between 15°C and 25°C). This product is hygroscopic (moisture-sensitive) and light-sensitive; prolonged exposure to atmospheric moisture or light may affect product performance. Keep away from heat sources and open flames.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
NCO Content	Contact for details
Viscosity @ 25°C	Contact for details
Hydroxyl Value (mg KOH/g)	Contact for details
Moisture Content (Karl Fischer)	< 0.05%
Specific Gravity @ 25°C	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.