Description

Polyoxy(methyl-1,2-ethanediyl), .alpha.,.alpha.,.alpha.-1,2,3-propanetriyltris.omega.-hydroxy-, polymer with 1,3-bis(1-isocyanato-1-methylethyl)benzene, 2-hydroxyethyl acrylate-blocked is a specialized, blocked polyisocyanate prepolymer designed for advanced coating and adhesive formulations. This product is engineered to provide a latent crosslinking functionality, enabling the development of high-performance, one-component (1K) systems that cure upon exposure to heat. It is essential for manufacturers seeking to enhance the durability, chemical resistance, and mechanical properties of their final products. Key target industries include automotive OEM and refinish, industrial metal coatings, plastics coating, and high-performance adhesives.

Application

• Automotive OEM and Refinish Coatings: As a crosslinker in high-solids, low-VOC, and waterborne clearcoats and basecoats for superior gloss, scratch resistance, and weatherability.
• Industrial Metal Coatings: For coil coatings, appliance finishes, and general industrial paints requiring excellent hardness, flexibility, and corrosion protection.
• Plastics Coatings: Provides adhesion and mar resistance for coatings on automotive interior parts, consumer electronics, and other plastic substrates.
• High-Performance Adhesives & Sealants: Used in heat-curable structural adhesives and sealants for automotive, aerospace, and construction applications.
• Powder Coatings: Acts as a crosslinking agent in thermosetting powder coatings, offering good flow and leveling with excellent final film properties.
• UV/EB Dual-Cure Systems: Incorporated into formulations that combine immediate UV curing with a subsequent thermal cure for deep-section or shadow area crosslinking.
• Can and Container Coatings: For interior and exterior food and beverage can linings where high chemical resistance and food contact compliance are critical.

Basic Information

Product Name	Polyoxy(methyl-1,2-ethanediyl), .alpha.,.alpha.,.alpha.-1,2,3-propanetriyltris.omega.-hydroxy-, polymer with 1,3-bis(1-isocyanato-1-methylethyl)benzene, 2-hydroxyethyl acrylate-blocked
CAS No.	121790-33-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details (Typically supplied as an oligomeric mixture)
Synonyms	Blocked aliphatic polyisocyanate prepolymer
HEA-blocked TMXDI trimer-based prepolymer
2-Hydroxyethyl acrylate blocked polyisocyanate
Acrylate-functional blocked polyisocyanate
Thermally activated polyurethane crosslinker
Blocked isocyanate crosslinking agent
Latent hardener for 1K polyurethane systems
EINECS	Contact for details

Quality Control

Every batch of our blocked polyisocyanate prepolymer is manufactured under a strict quality management system and undergoes rigorous analytical testing to ensure batch-to-batch consistency and performance reliability. Key parameters such as NCO content (blocked), viscosity, solids content, color, and blocking agent content are monitored. Certificates of Analysis (COA) detailing these specifications are provided with each shipment. Our production adheres to ISO 9001 standards, and we support our global customers with documentation for REACH compliance.

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). Keep containers tightly sealed when not in use to prevent moisture absorption, which can lead to premature reaction and gelation. Keep away from heat, sparks, and open flame. For long-term storage (exceeding 6 months), storage under an inert atmosphere (e.g., nitrogen) is recommended.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
Solids Content	70 ± 2 %
Viscosity (25°C)	3000 - 6000 mPa·s
Blocked NCO Content	6.0 - 8.0 %
Blocking Agent Content	20 - 25 %
Acid Value	≤ 2.0 mg KOH/g
Water Content	≤ 0.1 %

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