Description

Poly[oxy(methyl-1,2-ethanediyl)], α-hydro-ω-hydroxy-, ether with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol (3:1), polymer with 1,3-diisocyanatomethylbenzene, Et alc.-blocked is a specialized blocked polyurethane prepolymer. This compound is engineered to provide a stable, latent-reactive component that cures upon heating, releasing the blocking agent to form durable polyurethane networks. It is primarily required by formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to develop high-performance, one-component systems with excellent shelf stability and controlled reactivity.

Application

• One-Component (1K) Polyurethane Coatings: Serves as the core resin for high-performance industrial, automotive, and protective coatings that cure at elevated temperatures.
• Adhesives and Sealants: Used in formulating pre-mixed, moisture-stable adhesives and sealants that require heat activation for final curing and bond strength development.
• Elastomer Production: Acts as a key intermediate for manufacturing castable polyurethane elastomers with tailored mechanical properties.
• Wire and Cable Insulation: Employed in heat-curable insulating and jacketing compounds that demand excellent electrical properties and chemical resistance.
• Textile and Leather Finishing: Utilized in coatings and binders that provide durable, flexible finishes upon thermal curing.
• Composite Materials: Functions as a matrix resin or binder in fiber-reinforced composites, activated during the molding or curing process.

Basic Information

Product Name	Poly[oxy(methyl-1,2-ethanediyl)], α-hydro-ω-hydroxy-, ether with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol (3:1), polymer with 1,3-diisocyanatomethylbenzene, Et alc.-blocked
CAS No.	125301-94-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Ethanol-blocked TDI-based polyurethane prepolymer; Blocked polyurethane prepolymer from TDI and trimethylolpropane ethoxylate; Polyether polyol, TDI, ethanol-blocked; 1,3-Diisocyanatomethylbenzene polymer with α-hydro-ω-hydroxy-poly[oxy(methyl-1,2-ethanediyl)] and 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, ethanol-blocked; Blocked aliphatic polyurethane resin; Thermosetting polyurethane resin; Latent curing agent for PU; TDI-based blocked prepolymer
EINECS	Contact for details

Quality Control

Our blocked polyurethane prepolymers are manufactured under strict process controls to ensure batch-to-batch consistency and performance reliability. Quality is verified through parameters including NCO content (blocked), viscosity, solids content, and blocking agent level. A Certificate of Analysis (COA) detailing specific test results is provided with each 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 room temperature (15-25°C/59-77°F). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent moisture absorption, which can lead to premature reaction and viscosity increase. Keep away from heat and open flame.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
Solids Content	Contact for details
Viscosity (at 25°C)	Contact for details
Blocked NCO Content	Contact for details
Blocking Agent (Ethanol) Content	Contact for details
Specific Gravity (at 25°C)	Contact for details

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