Description

Poly[4,4'-Methylenebis(Phenyl Isocyanate)-Alt-1,4-Butanediol/Di(Propylene Glycol)/Polycaprolactone] CAS NO 68084-39-9 is a specialized thermoplastic polyurethane (TPU) prepolymer or resin derived from MDI, chain extenders, and a polycaprolactone polyol. This engineered material is valued for its excellent balance of mechanical properties, chemical resistance, and processability, making it a critical raw material for high-performance elastomers. It is primarily sought by manufacturers in the automotive, industrial machinery, medical device, and specialty adhesive and sealant sectors for creating durable, flexible components.

Application

• High-Performance Elastomers: Used as a base polymer for manufacturing durable seals, gaskets, and industrial wheels.
• Automotive Components: Formulation of under-the-hood parts, cable jacketing, and vibration-damping elements requiring oil and fuel resistance.
• Medical Device Tubing & Films: Serves as a raw material for biocompatible tubing, catheters, and protective films due to its flexibility and stability.
• Specialty Adhesives & Sealants: Key ingredient in formulating high-strength, flexible polyurethane adhesives and sealants for construction and assembly.
• Wire & Cable Insulation: Provides excellent insulation properties and mechanical protection for specialized cables.
• Industrial Rollers and Belts: Used in the production of abrasion-resistant rollers and conveyor belts.
• Protective Coatings: Base for creating tough, flexible coatings for textiles and industrial surfaces.

Basic Information

Item	Details
Product Name	Poly[4,4'-Methylenebis(Phenyl Isocyanate)-Alt-1,4-Butanediol/Di(Propylene Glycol)/Polycaprolactone]
CAS No.	68084-39-9
Molecular Formula	(C15H10N2O2 · C4H10O2 · C6H14O3 · C6H10O2)n
Molecular Weight	Polymer - Contact for details
Synonyms	MDI-Based Polycaprolactone Polyurethane Prepolymer; TPU Resin from MDI, BDO, PPG, and PCL; 4,4'-MDI/Butanediol/Di(propylene glycol)/Polycaprolactone Copolymer; Thermoplastic Polyurethane Elastomer Resin; Polyurethane Prepolymer CAS 68084-39-9; PCL-based TPU; Aliphatic Polyester-Based Polyurethane
EINECS	Contact for details

Quality Control

Our production of this thermoplastic polyurethane adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as NCO content, viscosity, and molecular weight distribution are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance specifications is provided with every shipment to support your quality assurance protocols.

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 (typically 15-25°C). Original containers must be kept sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature polymerization. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow pellets or solid
Identification (IR)	Conforms to structure
NCO Content	Contact for details
Viscosity (at specified temp)	Contact for details
Melting Point / Softening Point	Contact for details
Moisture Content (Karl Fischer)	< 0.05%
Specific Gravity	Contact for details

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