Description

1,3-Hexanediol, 2-ethyl-, polymer with 1,6-diisocyanatohexane and 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane, di-Et malonate- and Et acetoacetate-blocked is a specialized blocked polyisocyanate crosslinker designed for high-performance coating systems. This product is engineered to provide excellent stability in one-component formulations while offering a controlled cure profile upon heating. It is essential for formulators seeking to develop durable, chemical-resistant, and weather-stable finishes. Its primary applications are found in industrial, automotive, and coil coating sectors where superior film properties are required.

Application

• Automotive OEM and Refinish Clearcoats & Topcoats: Provides excellent gloss retention, chemical resistance, and durability for exterior automotive coatings.
• Industrial Metal Coatings: Used in coil coatings, appliance finishes, and general industrial metal primers and topcoats for enhanced corrosion protection and mechanical properties.
• Plastic Coatings: Offers good adhesion and flexibility for coatings on automotive plastics, consumer electronics, and other plastic substrates.
• High-Performance Wood Finishes: Imparts superior hardness, scratch resistance, and chemical durability for furniture, flooring, and cabinet coatings.
• One-Component (1K) Polyurethane Systems: Acts as a latent hardener, enabling stable single-package formulations that cure upon exposure to heat, simplifying application and logistics.
• Powder Coatings: Serves as a crosslinker in thermosetting powder coating formulations, contributing to flow, leveling, and final film performance.

Basic Information

Product Name	1,3-Hexanediol, 2-ethyl-, polymer with 1,6-diisocyanatohexane and 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane, di-Et malonate- and Et acetoacetate-blocked
CAS No.	103818-86-6
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Blocked aliphatic polyisocyanate; Blocked HDI/ IPDI trimer; Acetoacetate/ malonate blocked polyisocyanate; Polyurethane crosslinker, blocked; 2-Ethyl-1,3-hexanediol polymer with HDI and IPDI, blocked; Thermosetting resin hardener; Latent curing agent for polyols; 1K PU crosslinking agent.
EINECS	Contact for details

Quality Control

Our production of this blocked polyisocyanate adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as blocking agent content, NCO equivalent weight, viscosity, and color are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment 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 room temperature (15-25°C / 59-77°F). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent contact with atmospheric moisture, which can lead to premature reaction and gelation. Keep away from heat and open flame.

Specification

Item	Specification
Appearance	Clear, pale yellow to yellow viscous liquid
Solid Content	Contact for details
Viscosity (at 25°C)	Contact for details
NCO Equivalent Weight (Blocked)	Contact for details
Color (Gardner)	≤ 3
Blocking Agent Type	Diethyl malonate / Ethyl acetoacetate
De-blocking Temperature	~130-150°C

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