Description

1,2,3-Propanetriol, Polymer With 1,3-Diisocyanatomethylbenzene, 2-Ethyl-2-(Hydroxymethyl)-1,3-Propanediol, Methyloxirane And Oxirane, Caprolactam-Blocked is a specialized, caprolactam-blocked polyurethane prepolymer designed for controlled reactivity and enhanced shelf stability. This advanced material is engineered to provide a robust, cross-linked polymer network upon thermal activation, making it a critical component in high-performance coating and adhesive formulations. It is essential for manufacturers in the automotive, industrial maintenance, and electronics sectors seeking durable, chemically resistant finishes and bonds.

Application

• High-Performance Industrial Coatings: Used as a cross-linking agent in polyurethane-based paints and varnishes for metal, plastic, and wood substrates, offering excellent chemical and abrasion resistance.
• Automotive Refinish & OEM Coatings: A key component in primer, basecoat, and clearcoat systems requiring superior durability, gloss retention, and weatherability.
• Heat-Cured Adhesives & Sealants: Serves as the reactive backbone in one-component (1K) polyurethane adhesives that cure upon heating, used in assembly and bonding applications.
• Wire Enamels and Electrical Insulation: Employed in formulating insulating varnishes for motors, transformers, and coils due to its thermal stability and dielectric properties.
• Corrosion-Resistant Linings: Formulated into protective coatings for pipelines, tanks, and industrial equipment exposed to harsh chemical environments.
• Plastic & Composite Coatings: Provides adhesion and a hard, protective surface on engineering plastics and fiber-reinforced composites.

Basic Information

Product Name	1,2,3-Propanetriol, Polymer With 1,3-Diisocyanatomethylbenzene, 2-Ethyl-2-(Hydroxymethyl)-1,3-Propanediol, Methyloxirane And Oxirane, Caprolactam-Blocked
CAS No.	70892-40-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Caprolactam-blocked polyisocyanate prepolymer; Blocked polyurethane prepolymer; TDI/TMP/PO/EO adduct, caprolactam-blocked; Toluene diisocyanate-trimethylolpropane-ethylene oxide-propylene oxide polymer, caprolactam-blocked; Polyurethane crosslinker, blocked; 1,3-Diisocyanatomethylbenzene polymer with glycerol, TMP, EO, and PO, caprolactam-blocked; Thermal latent curing agent
EINECS	Contact for details

Quality Control

Our production of this blocked polyurethane prepolymer adheres to stringent quality management systems to ensure batch-to-batch consistency and performance reliability. Each 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/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 gelation. Keep away from heat and open flame.

Specification

Item	Specification
Appearance	Viscous liquid
Color (Gardner)	≤ 4
Solids Content	70 - 75 %
Viscosity (25°C)	2000 - 6000 mPa·s
Blocked NCO Content	8.0 - 10.0 %
Deblocking Temperature	≈ 130 - 150 °C
Specific Gravity (25°C)	1.05 - 1.15

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