Description

Propanoic Acid, 3-Hydroxy-2-(Hydroxymethyl)-2-Methyl-, Polymer With 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethylcyclohexane, Caprolactam-Blocked is a specialized blocked polyisocyanate prepolymer, a key intermediate in high-performance coating systems. This compound matters because it provides a latent, thermally-activated crosslinking functionality, enabling the formulation of one-component (1K) systems with excellent storage stability and controlled cure profiles. Industrial manufacturers in the coatings, adhesives, and composites sectors rely on this material to develop durable, chemical-resistant finishes for demanding applications.

Application

• One-Component (1K) Polyurethane Coatings: As a blocked isocyanate crosslinker for automotive OEM, refinish, and industrial coatings requiring excellent flow, hardness, and chemical resistance.
• Powder Coatings: A critical component in thermosetting powder coatings for appliances, architectural aluminum, and general metal finishing, where it provides low-temperature cure capability.
• High-Performance Industrial Finishes: Used in coil coatings, can coatings, and heavy-duty maintenance paints that demand superior weatherability and durability.
• Wire Enamels and Electrical Insulation: Imparts thermal stability and electrical insulating properties in magnet wire enamels and other electrical component coatings.
• Adhesives and Sealants: Serves as a crosslinking agent in heat-curable adhesive films and sealants for automotive and aerospace assembly.
• Composite Materials: Utilized as a matrix resin or modifier in fiber-reinforced plastics (FRP) to enhance interfacial adhesion and mechanical properties.

Basic Information

Item	Details
Product Name	Propanoic Acid, 3-Hydroxy-2-(Hydroxymethyl)-2-Methyl-, Polymer With 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethylcyclohexane, Caprolactam-Blocked
CAS No.	102923-77-3
Molecular Formula	Complex Polymer / Pre-polymer
Molecular Weight	Varies by formulation and degree of polymerization. Contact for details.
Synonyms	Caprolactam-blocked HDI isocyanurate; Blocked polyisocyanate based on HDI; Blocked HDI trimer; ε-Caprolactam blocked polyisocyanate; Hexamethylene diisocyanate (HDI) based blocked polyisocyanate; Polyurethane crosslinker, blocked; 1,6-Hexamethylene diisocyanate, polymer with 1,3,3-trimethylcyclohexane isocyanate, caprolactam-blocked; Thermosetting resin crosslinking agent.
EINECS	Contact for details.

Quality Control

Our production of this blocked polyisocyanate adheres to stringent quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as blocked isocyanate content, viscosity, solids content, and deblocking temperature are rigorously tested. Certificates of Analysis (COA) detailing these specifications are provided with every 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 room temperature (typically 15-25°C). Keep away from heat, sparks, and open flame. Moisture must be excluded to prevent premature reaction. Under these conditions, the product maintains optimal stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Solids Content	Contact for details
Viscosity (at 25°C)	Contact for details
Blocked NCO Content	Contact for details
Deblocking Temperature	~160°C (Typical onset)
Color (Gardner)	≤ 2
Specific Gravity (at 25°C)	Contact for details
Solubility	Soluble in common organic solvents (esters, ketones)

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