Description

1,2-Ethanediol, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,4-Butanediyl) And 1,1-Methylenebis4-Isocyanatobenzene, Block is a specialized polyurethane-polyether block copolymer, synthesized from ethylene glycol, poly(tetramethylene ether) glycol (PTMEG), and 4,4'-methylenebis(phenyl isocyanate) (MDI). This engineered polymer is valued for its unique combination of elastomeric properties, chemical resistance, and processability, making it a critical performance material. It is primarily sought by manufacturers in the polyurethane, specialty adhesive, sealant, and high-performance elastomer industries for formulating advanced materials.

Application

• Thermoplastic Polyurethane (TPU) Elastomers: A key raw material for producing high-grade TPUs used in automotive parts, industrial hoses, cables, and footwear for their durability and flexibility.
• Specialty Adhesives and Sealants: Imparts toughness, adhesion, and environmental resistance in high-performance construction, automotive, and industrial bonding applications.
• Castable Polyurethane Elastomers: Used in the formulation of rollers, wheels, gaskets, and industrial parts requiring excellent abrasion resistance and load-bearing capacity.
• Polymer Modification: Acts as a compatibilizer or toughening agent in polymer blends and composites to enhance mechanical properties.
• Coating and Film Formulations: Provides a flexible, protective, and chemical-resistant layer in specialized industrial and protective coatings.
• Medical Device Components: Potential use in biocompatible applications, subject to specific purity grades and regulatory compliance, for flexible tubing or device parts.

Basic Information

Product Name	1,2-Ethanediol, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,4-Butanediyl) And 1,1-Methylenebis4-Isocyanatobenzene, Block
CAS No.	61245-23-6
Molecular Formula	Contact for details
Molecular Weight	Variable (Polymer)
Synonyms	Poly(oxy-1,4-butanediyl), .alpha.-hydro-.omega.-hydroxy-, polymer with 1,2-ethanediol and 1,1'-methylenebis[4-isocyanatobenzene]; MDI/PTMEG/EG Block Copolymer; Poly(tetramethylene ether) glycol-ethylene glycol-MDI copolymer; Polyurethane-polyether block copolymer based on MDI, PTMEG, and EG; PTMEG-MDI-EG Terpolymer; 4,4'-MDI-PTMEG-EG Polymer; Thermoplastic polyetherurethane prepolymer
EINECS	Contact for details

Quality Control

Our production of this block copolymer adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as isocyanate (NCO) content, hydroxyl value, molecular weight distribution (GPC), and thermal stability (DSC/TGA) are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing specific grade specifications is provided with each shipment. We support compliance with relevant global standards, including REACH, and can tailor quality systems to meet specific customer or regulatory requirements.

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 reaction. Isolate from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white pellets or granules
Identification (IR)	Conforms to structure
Isocyanate (NCO) Content	Contact for details
Hydroxyl Value (mg KOH/g)	Contact for details
Melting Point (DSC)	Contact for details
Moisture Content (Karl Fischer)	< 0.05%
Viscosity (melt, @ specified temp)	Contact for details
Molecular Weight (GPC, Mn)	Contact for details

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