Description

1, 3-Butanediol, Polymer With 1, 3-Diisocyanatomethylbenzene And 2-Ethyl-2- (Hydroxymethyl) - 1, 3-Propanediol, Phenol-Blocked is a specialized blocked polyurethane prepolymer designed for controlled reactivity and enhanced shelf stability. This compound is critical for industrial formulators seeking to create high-performance coatings, adhesives, and elastomers with precise curing profiles. It is primarily utilized by manufacturers in the automotive, industrial maintenance, and specialty chemical sectors where durable, chemically resistant finishes are required.

Application

• High-Performance Industrial Coatings: Used as a key resin component in two-component (2K) polyurethane coatings for metal, concrete, and plastic substrates, providing excellent chemical and abrasion resistance.
• Adhesives and Sealants: Serves as a blocked polyol component in structural and elastic adhesives, enabling room-temperature or heat-activated curing for assembly and bonding applications.
• Elastomer Production: Employed in the formulation of castable polyurethane elastomers for industrial parts, rollers, and wheels, offering a balance of toughness and flexibility.
• Automotive Refinish and OEM Coatings: A vital ingredient in primer-surfacers and clear coats, contributing to superior gloss retention, weatherability, and durability.
• Wire and Cable Insulation: Used in potting compounds and insulating coatings that require thermal stability and electrical properties.
• Corrosion-Resistant Linings: Formulated into protective linings for tanks, pipes, and industrial flooring in aggressive chemical environments.

Basic Information

Product Name	1, 3-Butanediol, Polymer With 1, 3-Diisocyanatomethylbenzene And 2-Ethyl-2- (Hydroxymethyl) - 1, 3-Propanediol, Phenol-Blocked
CAS No.	68608-96-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Phenol-blocked polyurethane prepolymer; Blocked PU prepolymer; Polyurethane, polymer with 1,3-butanediol and 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, phenol-blocked; Toluene diisocyanate (TDI) polymer with butanediol and trimethylolpropane, phenol-blocked; Phenol-capped polyurethane; Blocked isocyanate prepolymer; MDI/TDI-based blocked prepolymer; Thermosetting polyurethane resin
EINECS	Contact for details

Quality Control

Our production of this blocked polyurethane prepolymer adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is characterized for critical parameters including blocked isocyanate content, viscosity, solids content, and deblocking temperature. Comprehensive Certificates of Analysis (COA) documenting these specifications are provided 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 room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use 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 to semi-solid
Color (Gardner)	≤ 4
Solids Content	70 - 80 %
Viscosity (at 25°C)	Contact for details
Blocked NCO Content	Contact for details
Deblocking Temperature	≈ 130 - 150 °C
Specific Gravity (at 25°C)	1.05 - 1.15
Flash Point	> 100 °C

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