Description

1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethylcyclohexane, Caprolactam-Blocked is a specialized, blocked polyisocyanate prepolymer derived from isophorone diisocyanate (IPDI) and a polyol, with caprolactam serving as the blocking agent. This chemistry matters for industrial formulators seeking a thermally-activated crosslinker that provides excellent storage stability and processing safety in one-component (1K) systems. It is primarily needed by manufacturers of high-performance powder coatings, coil coatings, and industrial finishes requiring enhanced durability, chemical resistance, and weatherability.

Application

• Powder Coatings: As a crosslinking agent in thermosetting powder coatings for appliances, automotive parts, and architectural aluminum, providing smooth finish and excellent flow.
• Coil Coatings: Used in pre-coated metal (PCM) for building panels and appliances, offering superior flexibility, formability, and corrosion resistance.
• Industrial Maintenance & Protective Coatings: Formulated into high-performance 1K systems for structural steel, pipelines, and industrial equipment that cure at elevated temperatures.
• Automotive OEM and Refinish: Employed in primer-surfacers and clear coats where excellent adhesion, hardness, and chemical resistance are required.
• Wire Enamels: Acts as a key resin component in magnet wire coatings, providing good electrical insulation and thermal stability.
• Adhesives and Sealants: Used in heat-curable, high-strength adhesive formulations for automotive and aerospace assemblies.

Basic Information

Product Name	1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethylcyclohexane, Caprolactam-Blocked
CAS No.	68610-70-8
Molecular Formula	Complex Polymer (Contact for details)
Molecular Weight	Varies by grade (Contact for details)
Synonyms	IPDI-based blocked polyisocyanate; Caprolactam-blocked IPDI prepolymer; IPDI trimer, caprolactam blocked; Blocked polyisocyanate crosslinker; Isophorone diisocyanate, polymer with polyol, caprolactam-blocked; Vestagon B 1530 (example trade name); Powder coating hardener; 1K polyurethane crosslinker
EINECS	Contact for details

Quality Control

Our production of this blocked polyisocyanate adheres to strict quality management systems, ensuring batch-to-batch consistency critical for coating performance. Key parameters such as blocked NCO content, viscosity, melting point, and free monomer content are rigorously tested. A comprehensive Certificate of Analysis (COA) is provided with each shipment, detailing specifications relevant to your application. Our manufacturing processes are designed to meet the demands of global markets, including compliance with relevant segments of REACH regulations.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive) and must be stored in a cool, dry place at room temperature (15-25°C). Ensure the original container is kept sealed to prevent moisture absorption, which can lead to premature deblocking or gelation. Store away from strong bases and organic solvents. Under these conditions, the product typically has a shelf life of 12 months from the date of manufacture.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Blocked NCO Content	Contact for details
Melting Range	Contact for details
Viscosity (at specific temp)	Contact for details
Free Monomer (IPDI)	< 0.5% (typical)
Moisture Content	< 0.5%

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