Description

Polyoxy(Methyl-1,2-Ethanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebisisocyanatobenzene is a specialized polyurethane prepolymer or block copolymer derived from polyether polyols and a diphenylmethane diisocyanate (MDI) derivative. This engineered material is valued for its unique combination of flexibility, toughness, and chemical resistance, making it a critical performance component in advanced formulations. It is primarily sought by manufacturers in the adhesives, sealants, coatings, and elastomer industries seeking to enhance product durability and processing characteristics.

Application

• Adhesive & Sealant Formulations: Acts as a key polymeric backbone or curative to provide enhanced flexibility, adhesion, and moisture resistance in high-performance construction and industrial adhesives.
• Polyurethane Elastomers: Serves as a prepolymer for manufacturing cast, thermoplastic, or millable polyurethane elastomers with superior abrasion resistance and mechanical properties.
• Coating & Paint Systems: Used as a resin modifier in protective coatings and paints to improve film elasticity, chemical resistance, and weatherability.
• Composite Materials: Functions as a matrix resin or toughening agent in fiber-reinforced composites for automotive and aerospace applications.
• Binder Systems: Employed as a polymeric binder in specialty applications such as foundry sands, explosives, or filtration media.
• Footwear & Apparel: Utilized in the production of durable, flexible soles, heels, and other components for footwear, as well as in waterproof breathable membranes for textiles.

Basic Information

Product Name	Polyoxy(Methyl-1,2-Ethanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebisisocyanatobenzene
CAS No.	39420-98-9
Molecular Formula	(C2nH4n+2On+1) + (C15H10N2O2) - Complex polymer structure
Molecular Weight	Varies (Polymer)
Synonyms	Poly(oxy-1,2-ethanediyl), α-hydro-ω-hydroxy-, polymer with 1,1'-methylenebis[4-isocyanatobenzene]; Polyethylene glycol, polymer with 1,1'-methylenebis(4-isocyanatobenzene); PEG-MDI prepolymer; Polyether polyol-MDI adduct; MDI-terminated poly(ethylene oxide); Polyurethane prepolymer based on PEG and MDI; Oxirane, methyl-, polymer with oxirane, polymer with 1,1'-methylenebis[4-isocyanatobenzene]
EINECS	Contact for details

Quality Control

Our production of this polyurethane prepolymer adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as isocyanate (NCO) content, viscosity, and hydroxyl value are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing assay, physical properties, and impurity profiles is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C/59-77°F). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature polymerization. Isolate from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
NCO Content	Contact for details
Viscosity @ 25°C	Contact for details
Hydroxyl Value	Contact for details
Water Content	< 0.1%
Specific Gravity	Contact for details

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