Description

1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With 1,3-Diisocyanato-2-Methylbenzene And 2,4-Diisocyanato-1-Methylbenzene is a specialized polyurethane prepolymer derived from a trimethylolpropane (TMP) starter and a mixture of toluene diisocyanate (TDI) isomers. This product matters as a high-performance, reactive intermediate that provides excellent mechanical properties, chemical resistance, and adhesion in final cured materials. It is primarily needed by formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as manufacturers of specialty composites and binders.

Application

• High-Performance Coatings: Used as a key resin component in two-component polyurethane coatings for industrial, marine, and automotive applications, offering durability and chemical resistance.
• Adhesives & Sealants: Serves as a prepolymer base for formulating strong, flexible polyurethane adhesives and sealants with good bonding to various substrates.
• Elastomers: Employed in the production of castable, thermoplastic, or millable polyurethane elastomers for gaskets, wheels, and industrial parts.
• Composite Binders: Acts as a matrix resin in fiber-reinforced plastics (FRP) and other composite materials, providing toughness and structural integrity.
• Waterproofing Membranes: A crucial component in liquid-applied waterproofing and roofing systems due to its excellent weatherability and seamless film formation.
• Industrial Potting & Encapsulation: Used for electrical potting compounds and encapsulants to protect sensitive components from moisture, vibration, and environmental stress.

Basic Information

Product Name	1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With 1,3-Diisocyanato-2-Methylbenzene And 2,4-Diisocyanato-1-Methylbenzene
CAS No.	111791-12-9
Molecular Formula	(C6H14O3 · C9H6N2O2)n
Molecular Weight	Polymer - Variable
Synonyms	Trimethylolpropane (TMP)-TDI Prepolymer; TMP-TDI Adduct; Polyurethane Prepolymer based on TMP and TDI; TDI-TMP Polymer; Toluene Diisocyanate-Trimethylolpropane Adduct; Isocyanate-terminated TMP-TDI polymer; Urethane prepolymer, TMP/TDI type; CAS 111791-12-9
EINECS	Contact for details

Quality Control

Our polyurethane prepolymers are manufactured under strict process controls to ensure batch-to-batch consistency. Quality is verified through rigorous testing of key parameters including NCO content, viscosity, color, and moisture content. Certificates of Analysis (COA) detailing these specifications are provided with every shipment. Our production adheres to ISO 9001 quality management principles, and we support compliance with relevant industry regulations such as REACH.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive) and must be stored under a dry, inert atmosphere (e.g., nitrogen blanket) to prevent premature reaction and gelation. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F) in a cool, dry, well-ventilated area away from heat, sparks, and open flame. Keep container tightly sealed when not in use.

Specification

Item	Specification
Appearance	Clear, pale yellow to amber viscous liquid
NCO Content	Contact for details
Viscosity @ 25°C	Contact for details
Color (Gardner)	≤ 4
Moisture (Karl Fischer)	≤ 0.05%
Specific Gravity @ 25°C	~1.15
Flash Point	> 200 °C

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