Description

Cyclohexane, 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethyl-, Polymer With Hydroxy-Terminated Polybutadiene CAS NO 68951-41-7 is a specialized polyurethane prepolymer formed from an aliphatic diisocyanate and a hydroxy-terminated polybutadiene (HTPB) backbone. This product is engineered to deliver a unique combination of flexibility, hydrolytic stability, and excellent adhesion to various substrates. It is primarily used by formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to enhance the performance characteristics of their polyurethane systems. The resulting materials benefit from the inherent properties of the polybutadiene segment, including low-temperature flexibility and resistance to water and chemicals.

Application

• High-Performance Elastomers: Used as a key component in the formulation of castable polyurethane elastomers requiring superior flexibility, abrasion resistance, and dynamic performance.
• Specialty Coatings & Linings: Serves as a binder in protective coatings for industrial flooring, tank linings, and marine applications where chemical and moisture resistance are critical.
• Adhesives & Sealants: Formulated into flexible adhesives and sealants that maintain bond integrity under thermal cycling and in humid environments.
• Composite Binders: Acts as a matrix resin or binder in composite materials, particularly where adhesion to plastics or metals and impact resistance are required.
• Potting & Encapsulation: Employed in electronic potting compounds to protect components from moisture, vibration, and thermal shock.
• Automotive Components: Used in the production of flexible automotive parts such as bushings, gaskets, and vibration-damping elements.

Basic Information

Product Name	Cyclohexane, 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethyl-, Polymer With Hydroxy-Terminated Polybutadiene
CAS No.	68951-41-7
Molecular Formula	Polymeric Mixture
Molecular Weight	Varies by formulation
Synonyms	IPDI-HTPB Prepolymer; Isophorone Diisocyanate-HTPB Adduct; HTPB-modified IPDI Prepolymer; Polybutadiene Polyurethane Prepolymer; Aliphatic Polyurethane Prepolymer based on IPDI and HTPB; Hydroxyl-terminated polybutadiene/IPDI polymer; 3-Isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate polymer with hydroxyl-terminated polybutadiene
EINECS	Contact for details

Quality Control

Our production of this polyurethane prepolymer adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as NCO content, viscosity, and residual monomer levels are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing the specific properties of your shipment is provided with every order to support your quality assurance and formulation processes.

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 15-25°C (59-77°F). This product is hygroscopic (moisture-sensitive) and highly volatile; containers must be kept sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and polymerization. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
NCO Content (%)	To be specified per grade
Viscosity (cPs @ 25°C)	To be specified per grade
Specific Gravity (25°C)	~1.02 - 1.05
Residual Monomer (IPDI)	< 0.5%
Moisture Content (Karl Fischer)	< 0.05%

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