Description

2H-Azepin-2-One, Hexahydro-, Polymer With 1,3-Diisocyanato-2-Methylbenzene, 2,4-Diisocyanato-1-Methylbenzene And 2,2'-Oxybis[Ethanol] is a high-performance polyurethane prepolymer or resin intermediate, identified by CAS NO 71519-77-2. This specialized polymer is engineered to deliver enhanced durability, chemical resistance, and tailored reactivity for demanding industrial formulations. It is a critical raw material for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to develop advanced polyurethane systems.

Application

• High-Performance Coatings: Used as a key binder in industrial and protective coatings for metal, concrete, and plastic substrates, providing excellent abrasion and chemical resistance.
• Adhesives & Sealants: Serves as a base polymer for formulating strong, flexible polyurethane adhesives and sealants used in construction, automotive assembly, and composite bonding.
• Elastomers and Castables: A precursor for manufacturing polyurethane elastomers, gaskets, wheels, and impact-absorbing components requiring a balance of toughness and elasticity.
• Composite Materials: Employed in the production of fiber-reinforced plastics (FRP) and other composite materials, enhancing matrix properties and interfacial adhesion.
• Waterproofing Membranes: Formulated into liquid-applied or sheet membranes for roofing and infrastructure due to its weatherability and sealing performance.
• Specialty Binders: Acts as a reactive binder in foundry sands, magnetic media, and other specialized applications where controlled cure profiles are essential.

Basic Information

Product Name	2H-Azepin-2-One, Hexahydro-, Polymer With 1,3-Diisocyanato-2-Methylbenzene, 2,4-Diisocyanato-1-Methylbenzene And 2,2'-Oxybis[Ethanol]
CAS No.	71519-77-2
Molecular Formula	Polymeric Substance
Molecular Weight	Contact for details
Synonyms	Caprolactam-Toluene Diisocyanate-Polyethylene Glycol Polymer; Polyurethane Prepolymer based on Caprolactam and TDI; TDI-Caprolactam-PEG Adduct; Poly[(oxy-1,2-ethanediyl)-α-hydro-ω-hydroxy-, polymer with 2-methyl-1,3-diisocyanatobenzene and hexahydro-2H-azepin-2-one]; Isocyanate-terminated Polyurethane Prepolymer; PU Prepolymer; Blocked Polyurethane Resin; Polyurethane Adhesive Intermediate
EINECS	Contact for details

Quality Control

Our production of this polyurethane intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as isocyanate (NCO) content, viscosity, and solids content are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures recommended for polyurethane prepolymers, typically between 15°C and 25°C. This material is moisture-sensitive (hygroscopic); containers must be kept sealed to prevent reaction with atmospheric moisture. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Viscous liquid
Color (Gardner)	≤ 4
NCO Content (%)	Contact for details
Viscosity (cPs @ 25°C)	Contact for details
Solids Content (%)	Contact for details
Specific Gravity (25°C)	Contact for details
Flash Point	> 200 °C

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