Description

Poly(Propylene Glycol), Tolylene 2,4-Diisocyanate Terminated is a specialized prepolymer, a key intermediate in polyurethane chemistry formed by the reaction of poly(propylene glycol) with tolylene 2,4-diisocyanate (TDI). This compound matters for its role as a versatile building block, providing the reactive isocyanate (-NCO) end groups necessary for chain extension and cross-linking with polyols or other active hydrogen compounds. It is primarily needed by formulators and manufacturers in the adhesives, sealants, coatings, and elastomers industries to create tailored polyurethane systems with specific flexibility, adhesion, and durability properties.

Application

• Polyurethane Adhesives & Sealants: Serves as a core prepolymer for formulating high-performance, flexible, and moisture-curing adhesives and sealants used in construction and automotive assembly.
• Elastomer Production: Used as a key intermediate in the manufacture of castable, thermoplastic, or millable polyurethane elastomers for wheels, rollers, and industrial parts.
• Coatings & Paints: Acts as a reactive component in two-component (2K) polyurethane coatings, providing excellent weatherability, chemical resistance, and mechanical properties.
• Binder Systems: Employed in the production of binders for composite materials, foundry sands, and abrasive tools.
• Footwear & Apparel: Utilized in the synthesis of polyurethane components for shoe soles, insoles, and synthetic leather.
• Flexible Foam Modification: Can be used to modify the properties of flexible polyurethane foams, enhancing resilience and load-bearing characteristics.

Basic Information

Product Name	Poly(Propylene Glycol), Tolylene 2,4-Diisocyanate Terminated
CAS No.	9057-91-4
Molecular Formula	Typically represented as (C10H8N2O2).(C3H6O)n, where n varies based on the polyol chain length.
Molecular Weight	Variable, dependent on the molecular weight of the starting poly(propylene glycol). Contact for details.
Synonyms	PPG-TDI Prepolymer; TDI-Terminated Poly(Propylene Glycol); Polypropylene Glycol Toluene Diisocyanate Adduct; TDI-PPG Adduct; Polyoxypropylene Glycol, TDI-Terminated; Isocyanate-Terminated Polypropylene Glycol; Polyurethane Prepolymer (PPG/TDI type); Oligomeric TDI-PPG
EINECS	Contact for details.

Quality Control

Our Poly(Propylene Glycol), Tolylene 2,4-Diisocyanate Terminated is manufactured under strict quality protocols. Each batch undergoes rigorous testing to ensure consistent performance, including measurement of isocyanate (NCO) content, viscosity, and moisture levels. Certificates of Analysis (COA) detailing these 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. Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent reaction with atmospheric moisture. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Isocyanate (NCO) Content	As per grade (e.g., 3.0 - 6.0 %)
Viscosity @ 25°C	As per grade
Moisture (Karl Fischer)	≤ 0.05 %
Specific Gravity @ 25°C	As per grade
Identification (IR)	Conforms

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