Description

1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypolyoxy(Methyl-1,2-Ethanediyl) And 1,1-Methylenebis4-Isocyanatobenzene is a specialized polyurethane prepolymer derived from trimethylolpropane (TMP), polyether polyols, and MDI (4,4'-diphenylmethane diisocyanate). This compound matters as a high-performance building block, offering excellent reactivity, mechanical strength, and formulation versatility for creating custom polyurethane systems. It is primarily needed by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for producing flexible and rigid foams, where precise polymer architecture is critical.

Application

• Polyurethane Coatings: Serves as a key resin component for high-performance industrial, protective, and decorative coatings requiring chemical resistance and durability.
• Adhesives & Sealants: Used in formulating structural and elastic adhesives and sealants with strong bonding properties and flexibility.
• Elastomers: Acts as a prepolymer for manufacturing cast, thermoplastic, or millable polyurethane elastomers used in wheels, rollers, and gaskets.
• Flexible & Rigid Foams: A reactive intermediate in the production of polyurethane foams for insulation, cushioning, and composite applications.
• Binder Systems: Employed as a polymeric binder in composite materials, foundry sands, and filtration media.
• Waterborne Polyurethane Dispersions (PUDs): Can be modified and dispersed in water to create environmentally friendly coating and adhesive formulations.

Basic Information

Item	Details
Product Name	1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypolyoxy(Methyl-1,2-Ethanediyl) And 1,1-Methylenebis4-Isocyanatobenzene
CAS No.	9020-84-2
Molecular Formula	Complex Polymer (Copolymer)
Molecular Weight	Variable (Polymer)
Synonyms	Polyurethane prepolymer based on TMP and MDI; MDI-TMP-Polyether prepolymer; Trimethylolpropane ethoxylate-MDI copolymer; Polyoxypropylene triol-MDI-TMP adduct; Isocyanate-terminated polyether prepolymer; Polyether polyol-MDI-TMP polymer; Reactive polyurethane intermediate; CAS 9020-84-2
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 parameters such as NCO content, viscosity, and hydroxyl value. Certificates of Analysis (COA) detailing these specifications are provided with each shipment. We adhere to ISO 9001 quality management standards, and our production can be adapted to meet specific customer and regulatory requirements.

Storage

Preserve in a tightly closed, moisture-proof 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). Keep away from heat, open flames, and sources of ignition. Due to its reactive isocyanate groups, the product is moisture-sensitive (hygroscopic) and must be stored under a dry, inert atmosphere (e.g., nitrogen blanket) once opened to prevent polymerization and gelation.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
NCO Content (%)	To be specified per grade
Viscosity @ 25°C (cPs)	To be specified per grade
Hydroxyl Value (mg KOH/g)	To be specified per grade
Specific Gravity @ 25°C	To be specified per grade
Moisture Content (Karl Fischer)	≤ 0.05%

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