Description

Benzene, 1,3-Diisocyanatomethyl-, Polymer With Hydroxy-Terminated Polybutadiene, 2-Hydroxyethyl Methacrylate-Blocked is a specialized blocked polyisocyanate prepolymer designed for high-performance, moisture-curing coating systems. This advanced material is crucial for formulating coatings that require excellent flexibility, chemical resistance, and adhesion to challenging substrates. It is primarily sought after by manufacturers in the automotive, industrial maintenance, and heavy-duty protective coatings sectors.

Application

• Automotive OEM and Refinish Primers: Provides excellent stone chip resistance and adhesion to metal and plastic components.
• Heavy-Duty Industrial & Marine Coatings: Used in formulations requiring superior corrosion protection and durability in harsh environments.
• Flexible Substrate Coatings: Ideal for coatings on rubber, plastics, and composites where flexibility and impact resistance are critical.
• Adhesives and Sealants: Serves as a key component in high-strength, moisture-curing adhesive systems.
• Elastomeric Coatings: Imparts excellent elongation and recovery properties for waterproofing and protective membranes.
• Aerospace Coatings: Used in specialized coatings for aircraft components requiring lightweight, durable protection.

Basic Information

Product Name	Benzene, 1,3-Diisocyanatomethyl-, Polymer With Hydroxy-Terminated Polybutadiene, 2-Hydroxyethyl Methacrylate-Blocked
CAS No.	68987-46-2
Molecular Formula	Polymeric Substance
Molecular Weight	Varies by formulation
Synonyms	Blocked HTPB-based polyisocyanate; HEMA-blocked TDI/HTBP prepolymer; Moisture-curable polyurethane prepolymer; Blocked polyisocyanate crosslinker; 2-Hydroxyethyl methacrylate blocked TDI prepolymer; TDI-HTPB-HEMA adduct; Isocyanate-terminated polybutadiene, HEMA-blocked; Reactive urethane prepolymer
EINECS	Contact for details

Quality Control

Our production of this blocked polyisocyanate adheres to strict batch-to-batch consistency protocols. Quality is monitored through key parameters including blocked isocyanate content, viscosity, solids content, and color. A comprehensive Certificate of Analysis (COA) is provided with each shipment, detailing specifications relevant to coating performance. We operate under a quality management system aligned with ISO 9001 standards to ensure reliability for industrial applications.

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 exposure to atmospheric moisture, which can initiate premature curing. Keep away from heat sources and open flames.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 4
Solids Content	70 - 75 %
Viscosity (25°C)	3000 - 6000 mPa·s
Blocked NCO Content	4.0 - 5.5 %
Specific Gravity (25°C)	1.05 - 1.10
Flash Point	> 100 °C

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