Description

Oxirane, Methyl-, Polymer With Oxirane, Ether With 1,2-Propanediol (2:1), Polymer With 1,3-Diisocyanatomethylbenzene, Nonylphenol-Blocked is a specialized, blocked polyurethane prepolymer designed for controlled reactivity in demanding industrial formulations. This product matters because it provides a stable, one-component system that only cures upon exposure to heat, moisture, or specific catalysts, offering manufacturers precise processing control and extended pot life. It is primarily needed by formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to enhance product durability, chemical resistance, and mechanical properties.

Application

• High-Performance Industrial Coatings: Used as a binder in heat-cured coatings for automotive, coil, and industrial maintenance applications, providing excellent hardness and chemical resistance.
• Adhesives and Sealants: Serves as a key component in moisture-curing or heat-activated polyurethane adhesives and sealants for construction, automotive assembly, and composite bonding.
• Elastomer Production: Employed in the manufacture of cast polyurethane elastomers for rollers, wheels, and industrial parts requiring abrasion resistance and toughness.
• Fiber Sizing and Treatment: Acts as a surface modifier and sizing agent for glass or carbon fibers to improve adhesion to polymer matrices in composite materials.
• Textile and Leather Finishing: Utilized in coatings and finishes to impart water repellency, durability, and a soft hand feel to technical textiles and leather goods.
• Encapsulation and Potting Compounds: Formulated into protective compounds for electronic components, where controlled cure profiles and environmental protection are critical.

Basic Information

Item	Details
Product Name	Oxirane, Methyl-, Polymer With Oxirane, Ether With 1,2-Propanediol (2:1), Polymer With 1,3-Diisocyanatomethylbenzene, Nonylphenol-Blocked
CAS No.	102900-03-8
Molecular Formula	Complex Polymer (Contact for details)
Molecular Weight	Varies by grade (Contact for details)
Synonyms	Nonylphenol-blocked polyurethane prepolymer; Blocked polyisocyanate prepolymer; MDI-based blocked prepolymer; Polyether polyol, propoxylated, polymer with 1,3-diisocyanatomethylbenzene, nonylphenol-blocked; Thermosetting polyurethane resin; Heat-activated polyurethane; 1,3-Diisocyanatomethylbenzene, polymer with methyloxirane and oxirane, ether with 1,2-propanediol, nonylphenol-blocked; CAS 102900-03-8.
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 a series of analytical tests including measurement of NCO content (blocked), viscosity, non-volatile content, and deblocking temperature. Certificates of Analysis (COA) documenting these specifications are 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 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 moisture ingress, which can lead to premature reaction and gelation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Viscous liquid, clear to slightly hazy
Color (Gardner)	≤ 4
Non-Volatile Content	≥ 99.0 %
Viscosity @ 25°C	2,000 - 6,000 mPa·s (Typical)
Blocked NCO Content	8.0 - 12.0 %
Deblocking Onset Temperature	≈ 130 - 150 °C (DSC)
Specific Gravity @ 25°C	1.05 - 1.10

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