Description

1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With 1,3-Diisocyanatomethylbenzene, Phenol-Blocked is a blocked polyisocyanate prepolymer, a key intermediate for high-performance polyurethane systems. This product matters for formulators seeking enhanced pot life and controlled reactivity, enabling safer handling and processing of advanced coatings and adhesives. It is primarily needed by manufacturers in the automotive, industrial coating, and specialty adhesive sectors who require durable, chemically resistant finishes.

Application

• High-Performance Coatings: As a crosslinker in automotive OEM, refinish, and industrial maintenance coatings for superior chemical and abrasion resistance.
• Adhesives and Sealants: Used in formulating one-component (1K) polyurethane adhesives that cure upon exposure to heat, providing strong bonds for assembly and construction.
• Elastomers and Castings: Serves as a precursor for manufacturing durable polyurethane elastomers, rollers, and industrial parts.
• Powder Coatings: Acts as a blocked curing agent in heat-cured powder coating formulations, offering excellent flow and finish.
• Textile and Leather Finishes: Imparts water repellency, durability, and flexibility to synthetic leather and technical textiles.
• Electrical Encapsulation: Used in potting and encapsulation compounds for electronic components, providing insulation and protection.

Basic Information

Product Name	1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With 1,3-Diisocyanatomethylbenzene, Phenol-Blocked
CAS No.	68037-45-6
Molecular Formula	Polymeric substance; Contact for details
Molecular Weight	Polymeric substance; Contact for details
Synonyms	Blocked HDI Trimer; Phenol-blocked polyisocyanate; Blocked polyisocyanate based on HDI; Blocked aliphatic polyisocyanate; Hexamethylene diisocyanate trimer, phenol-blocked; HDI isocyanurate, phenol-blocked; Polyurethane crosslinker, blocked; 1,3-Diisocyanatomethylbenzene polymer with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, phenol-blocked
EINECS	Contact for details

Quality Control

Our production of blocked polyisocyanate prepolymers adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested for critical parameters including blocked isocyanate content, viscosity, color, and deblocking temperature. Certificates of Analysis (COA) documenting full specifications are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C/59-77°F). This product is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent exposure to atmospheric moisture, which can lead to premature reaction or gelation.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
Viscosity (at 25°C)	Contact for details
Blocked NCO Content	Contact for details
Solid Content	Contact for details
Deblocking Temperature	~150°C

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