Description

1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With 1,3-Diisocyanatomethylbenzene is a high-performance, cross-linked polyurethane polyol prepolymer derived from trimethylolpropane (TMP) and meta-tetramethylxylene diisocyanate (m-TMXDI). This specialized polymer is valued for its excellent weatherability, hydrolytic stability, and resistance to yellowing, making it a superior choice for demanding coating and adhesive formulations. It is primarily utilized by manufacturers in the paints & coatings, specialty adhesives, and advanced elastomers industries seeking enhanced durability and performance.

Application

• High-Performance Coatings: A key resin component in automotive clear coats, industrial maintenance paints, and marine coatings where superior gloss retention and resistance to UV degradation are critical.
• Specialty Adhesives & Sealants: Used in formulating flexible, moisture-curing polyurethane adhesives and sealants for construction, automotive, and aerospace applications.
• Elastomers: Serves as a building block for castable and thermoplastic polyurethane elastomers requiring excellent mechanical properties and chemical resistance.
• UV-Curable Systems: Incorporated as an oligomer in radiation-curable coatings and inks for plastics and wood, offering fast cure times and high crosslink density.
• Fiber Optic Coatings: Employed in primary and secondary coatings for optical fibers due to its low moisture absorption and stable mechanical performance.
• Composite Materials: Acts as a matrix resin or modifier in fiber-reinforced composites for enhanced toughness and environmental stability.

Basic Information

Product Name	1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With 1,3-Diisocyanatomethylbenzene
CAS No.	9017-09-8
Molecular Formula	(C9H20O3 · C10H10N2O2)n
Molecular Weight	Polymer - Contact for details
Synonyms	Poly(oxy(methyl-1,3-propanediyl)), α-hydro-ω-hydroxy-, polymer with 1,3-diisocyanatomethylbenzene; TMP-m-TMXDI prepolymer; Trimethylolpropane-m-TMXDI polymer; Polyurethane polyol based on TMP and m-TMXDI; m-TMXDI/TMP adduct; Aliphatic polyurethane prepolymer (based on m-TMXDI); Meta-tetramethylxylene diisocyanate trimethylolpropane polymer
EINECS	Contact for details

Quality Control

Our production of this polyurethane prepolymer adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as NCO content, hydroxyl value, viscosity, and color are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15-25°C (59-77°F). This product is hygroscopic (moisture-sensitive). Keep containers tightly sealed when not in use to prevent moisture absorption and premature reaction. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
NCO Content	Contact for details
Hydroxyl Value (mg KOH/g)	Contact for details
Viscosity @ 25°C (cPs)	Contact for details
Color (Gardner)	≤ 2
Specific Gravity @ 25°C	Contact for details
Moisture Content (Karl Fischer)	≤ 0.05%

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