Description

α-Hydro-ω-Hydroxypoly[Oxy(Methyl-1,2-Ethanediyl)] Polymer With 1,1'- Methylenebis[4-Isocyanatocyclohexane], 2-Hydroxyethyl Acrylate-Blocked is a specialized, blocked polyurethane prepolymer designed for advanced coating and adhesive formulations. This compound is engineered to provide superior performance by offering a latent reactive system that cures upon exposure to heat, moisture, or specific catalysts, enabling precise application control. It is a critical raw material for industries requiring high-performance, durable, and chemically resistant finishes, such as automotive, industrial maintenance, and specialty plastics.

Application

• High-Performance Coatings: Used as a key binder in automotive OEM and refinish coatings, industrial maintenance paints, and coil coatings for enhanced durability, chemical resistance, and weatherability.
• Adhesives and Sealants: Serves as a base polymer in structural adhesives, laminating adhesives, and elastic sealants, providing strong bonding and flexibility.
• UV-Curable Systems: Acts as a reactive oligomer in UV-curable inks, coatings, and 3D printing resins, where the blocked isocyanate group allows for dual-cure mechanisms.
• Elastomers and Castables: Employed in the production of polyurethane elastomers, gaskets, and molded parts requiring specific mechanical properties and processing stability.
• Textile and Leather Finishes: Utilized in coatings for synthetic leather, waterproof textiles, and other fabric treatments to impart abrasion resistance and a soft hand feel.
• Wood and Furniture Coatings: Formulated into high-quality topcoats for furniture, flooring, and cabinetry, offering excellent hardness and scratch resistance.

Basic Information

Product Name	α-Hydro-ω-Hydroxypoly[Oxy(Methyl-1,2-Ethanediyl)] Polymer With 1,1'- Methylenebis[4-Isocyanatocyclohexane], 2-Hydroxyethyl Acrylate-Blocked
CAS No.	68442-29-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Blocked Polyurethane Prepolymer; HDI-based Blocked Prepolymer; 2-Hydroxyethyl Acrylate-blocked HDI Prepolymer; Polyether Polyol, polymer with 1,1'-methylenebis[4-isocyanatocyclohexane], 2-hydroxyethyl acrylate-blocked; Aliphatic Blocked Polyisocyanate; Moisture-Curable Urethane Acrylate; H12MDI-based Blocked Isocyanate Oligomer; Urethane Acrylate Oligomer with Blocked NCO.
EINECS	Contact for details

Quality Control

Our blocked polyurethane prepolymer is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including measurement of NCO content, viscosity, solids content, and blocking agent efficiency, to ensure consistent performance and batch-to-batch uniformity. Certificates of Analysis (COA) detailing all 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, and well-ventilated area at temperatures between 15-25°C (59-77°F). This product is hygroscopic (moisture-sensitive) and light-sensitive. Prolonged exposure to moisture or elevated temperatures may lead to premature reaction and reduced shelf life. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
Solids Content	70 ± 2 %
Viscosity (25°C)	3000 - 6000 mPa·s
Blocked NCO Content	5.0 - 7.0 %
Acid Value	≤ 2.0 mg KOH/g
Identification (IR)	Conforms

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