Description

Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethylcyclohexane CAS NO 39378-01-3 is a high-performance polyurethane prepolymer based on polytetramethylene ether glycol (PTMEG) and isophorone diisocyanate (IPDI). This specialized chemical is engineered to deliver exceptional hydrolytic stability, low-temperature flexibility, and outstanding mechanical properties in the final cured material. It is a critical raw material for formulators and manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to produce durable, high-quality polyurethane products.

Application

• High-Performance Elastomers: Used as a prepolymer for manufacturing cast, thermoplastic, and millable polyurethane elastomers requiring excellent abrasion resistance and dynamic performance.
• Industrial & Protective Coatings: Serves as a key component in two-component polyurethane coatings for industrial flooring, tank linings, and marine applications, offering superior chemical and water resistance.
• Adhesives and Sealants: Formulated into high-strength, flexible adhesives and sealants for the automotive, construction, and aerospace sectors.
• Fiber Spandex (Lycra-type): Acts as a crucial macro-diol in the production of spandex fibers, providing the necessary elasticity and recovery.
• Medical Device Components: Utilized in the synthesis of biocompatible polyurethanes for certain medical tubing, catheters, and device parts due to its stability profile.
• Resilient Foams: Employed in the formulation of microcellular foams for shoe soles, gaskets, and vibration-damping materials.

Basic Information

Product Name	Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethylcyclohexane
CAS No.	39378-01-3
Molecular Formula	(C4H8O)n·C15H24N2O2
Molecular Weight	Varies by PTMEG molecular weight and NCO content
Synonyms	PTMEG/IPDI Prepolymer; Poly(tetramethylene ether glycol)-co-isophorone diisocyanate; IPDI-terminated PTMEG; PolyTHF/IPDI prepolymer; Aliphatic polyether urethane prepolymer; Polyurethane prepolymer based on PTMEG and IPDI; 1,1'-Methylenebis(4-isocyanatocyclohexane) polymer with .alpha.-hydro-.omega.-hydroxypoly(oxy-1,4-butanediyl)
EINECS	Contact for details

Quality Control

Our PTMEG/IPDI prepolymer is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent performance, including measurement of NCO content, viscosity, and moisture levels. Certificates of Analysis (COA) detailing these specifications are provided with every shipment. Our production adheres to relevant ISO standards, and we can support compliance requirements for REACH and other global regulatory frameworks.

Storage

Preserve in a tightly closed, moisture-proof container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15°C and 25°C (59°F and 77°F). This product is hygroscopic (moisture-sensitive). Prolonged exposure to atmospheric moisture will lead to reaction and viscosity increase. Use under a dry nitrogen atmosphere for critical applications.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
NCO Content	2.0 - 6.0 % (Typical, varies by grade)
Viscosity @ 25°C	1,000 - 15,000 mPa·s (Varies by grade)
Moisture (Karl Fischer)	≤ 0.05 %
Specific Gravity @ 25°C	1.00 - 1.10
Color (Gardner)	≤ 3

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