Description

1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-, polymer with .alpha.-hydro-.omega.-hydroxypoly(oxy-1,4-butanediyl) and 1,1-methylenebis4-isocyanatobenzene, isocyanate-terminated is a specialized, high-performance polyurethane prepolymer. This compound is valued for its reactive isocyanate end groups, which enable it to form durable, cross-linked polymer networks upon curing. It is primarily used by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to enhance product mechanical strength, chemical resistance, and adhesion properties.

Application

• High-Performance Coatings: Used as a key resin component in industrial, automotive, and protective coatings for superior durability and gloss.
• Adhesives & Sealants: Serves as a base polymer for formulating structural adhesives, potting compounds, and flexible sealants with excellent bonding strength.
• Elastomers and Castable Urethanes: Employed in the production of耐磨 elastomers, rollers, gaskets, and impact-absorbing materials.
• Composite Materials: Acts as a matrix resin or binder in fiber-reinforced composites for the aerospace and automotive sectors.
• Waterproofing Membranes: A critical ingredient in liquid-applied roofing and waterproofing systems due to its seamless film formation and weather resistance.
• Encapsulation and Potting: Used for protecting sensitive electronic components from moisture, vibration, and environmental stress.

Basic Information

Product Name	1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-, polymer with .alpha.-hydro-.omega.-hydroxypoly(oxy-1,4-butanediyl) and 1,1-methylenebis[4-isocyanatobenzene], isocyanate-terminated
CAS No.	68610-33-3
Molecular Formula	Polymeric substance; Contact for details
Molecular Weight	Varies by grade; Contact for details
Synonyms	Polyurethane prepolymer based on TMP, PTMO, and MDI; Isocyanate-terminated poly(ether-urethane) prepolymer; MDI-PTMO-TMP prepolymer; Poly(tetramethylene oxide)-based urethane prepolymer; Reactive polyurethane resin; Aliphatic polyether urethane prepolymer (based on composition); 4,4'-Methylenebis(phenyl isocyanate), polymer with .alpha.-hydro-.omega.-hydroxypoly[oxy(1,4-butanediyl)] and 2-ethyl-2-(hydroxymethyl)-1,3-propanediol
EINECS	Contact for details

Quality Control

Our production of this polyurethane prepolymer adheres to strict quality management systems. Each batch is characterized for critical parameters including isocyanate (NCO) content, viscosity, and moisture content to ensure consistent reactivity and performance. Certificates of Analysis (COA) detailing these specifications are provided with every shipment. We support compliance with relevant industry standards for raw materials used in formulated products.

Storage

Preserve in a tightly closed, moisture-proof container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures recommended for the specific grade (typically between 15°C and 25°C). This product is hygroscopic (moisture-sensitive) and must be protected from atmospheric moisture to prevent premature reaction and gelation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Isocyanate (NCO) Content	As per grade (Typical range: 3-6%)
Viscosity @ 25°C	As per grade (cP)
Specific Gravity @ 25°C	~1.05 - 1.10
Moisture Content (Karl Fischer)	≤ 0.05%
Identification (IR)	Conforms to structure

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