Description

1,2-Ethanediol, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,2-Ethanediyl) And 1,1-Methylenebis4-Isocyanatobenzene is a specialized polyurethane prepolymer or polymer derived from polyethylene glycol (PEG) and methylene diphenyl diisocyanate (MDI). This compound matters for its role as a versatile building block, offering tunable properties for creating high-performance materials with specific elasticity, adhesion, and chemical resistance. It is essential for formulators and manufacturers in sectors requiring advanced polymer systems, such as adhesives, coatings, and biomedical materials.

Application

• Polyurethane Adhesives & Sealants: Serves as a key prepolymer component for formulating high-strength, flexible adhesives used in construction, automotive assembly, and footwear manufacturing.
• Specialty Coatings & Paints: Used to develop durable, chemical-resistant, and weatherable coatings for industrial equipment, marine applications, and protective finishes.
• Elastomers and Flexible Foams: Acts as a precursor in the production of thermoplastic polyurethanes (TPU) and flexible foams for gaskets, rollers, and cushioning materials.
• Biomedical & Pharmaceutical Matrices: Employed in controlled drug delivery systems and biocompatible coatings for medical devices due to the potential biocompatibility of PEG-based segments.
• Composite Materials: Functions as a resin modifier or binder to enhance the toughness and interfacial adhesion in fiber-reinforced composites.
• Encapsulation & Potting Compounds: Utilized in electronics to protect sensitive components by providing a robust, moisture-resistant polymeric encapsulation.

Basic Information

Product Name	1,2-Ethanediol, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,2-Ethanediyl) And 1,1-Methylenebis4-Isocyanatobenzene
CAS No.	39385-58-5
Molecular Formula	Contact for details
Molecular Weight	Variable (Polymer)
Synonyms	Poly(ethylene glycol) methylene diphenyl diisocyanate prepolymer; PEG-MDI prepolymer; Polyoxyethylene glycol MDI adduct; Polyethylene glycol bis(4-isocyanatophenyl)methane polymer; α-Hydro-ω-hydroxypoly(oxy-1,2-ethanediyl) polymer with 1,2-ethanediol and methylenebis(4-isocyanatobenzene); MDI-PEG polymer; Polyurethane prepolymer based on PEG and MDI; Hydroxyl-terminated polyethylene glycol-MDI copolymer
EINECS	Contact for details

Quality Control

Our production of this polymer adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as NCO content, hydroxyl value, viscosity, and molecular weight distribution are rigorously monitored. Certificates of Analysis (COA) detailing these specifications are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed under a dry atmosphere (e.g., nitrogen blanket) to prevent moisture absorption and premature reaction. Isolate from strong acids, bases, and other reactive chemicals.

Specification

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

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