Description

Benzene, 1,3-Diisocyanatomethyl-, Homopolymer, Polypropylene Glycol Mono-Bu Ether- And 2-Pyridineethanol-Blocked is a specialized, blocked polyisocyanate prepolymer designed for controlled reactivity in advanced coating systems. This product matters because it provides a stable, latent curing agent that only becomes active upon heating, enabling the formulation of high-performance, one-component (1K) polyurethane coatings with excellent shelf life. It is essential for industries requiring durable, chemical-resistant finishes, such as automotive OEM and refinish, industrial maintenance, and coil coatings, where precise application and final film properties are critical.

Application

• One-Component (1K) Polyurethane Coatings: Serves as a thermally activated crosslinker for hydroxyl-functional acrylics, polyesters, and polyols.
• Automotive Refinish and OEM Coatings: Used in clearcoats and pigmented topcoats requiring excellent gloss, chemical resistance, and weatherability.
• Industrial Maintenance Coatings: Formulated into protective coatings for steel structures, pipelines, and industrial equipment exposed to harsh environments.
• Coil and Can Coatings: Provides flexibility, adhesion, and corrosion resistance for metal substrates in pre-coated metal applications.
• Adhesives and Sealants: Acts as a crosslinking agent in heat-curable adhesive systems for automotive and assembly applications.
• Plastic Coatings: Enhances the surface properties of automotive interior parts and consumer electronics.

Basic Information

Product Name	Benzene, 1,3-Diisocyanatomethyl-, Homopolymer, Polypropylene Glycol Mono-Bu Ether- And 2-Pyridineethanol-Blocked
CAS No.	157420-46-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Blocked HDI trimer; Blocked polyisocyanate based on HDI; Blocked aliphatic polyisocyanate; 2-Pyridineethanol-blocked polyisocyanate; PPG mono-butyl ether-blocked polyisocyanate; Thermally reactive polyurethane crosslinker; Latent curing agent for PU coatings; Benzene, 1,3-diisocyanatomethyl-, homopolymer, ether with α-butyl-ω-hydroxypoly(oxy-1,2-ethanediyl) and 2-(2-hydroxyethyl)pyridine
EINECS	Contact for details

Quality Control

Our blocked polyisocyanate products are manufactured under a strict quality management system to ensure batch-to-batch consistency and performance reliability. Each lot undergoes rigorous analytical testing, including measurement of NCO content (blocked), viscosity, solids content, and color. Certificates of Analysis (COA) detailing all specification parameters 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 temperatures between 15°C and 25°C (59°F and 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.

Specification

Item	Specification
Appearance	Clear, pale yellow to yellow liquid
Solids Content	Contact for details
Viscosity (at 25°C)	Contact for details
Blocked NCO Content	Contact for details
Color (Gardner)	≤ 3
Specific Gravity (at 25°C)	Contact for details
Flash Point	> 100 °C

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