Description

1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,4-Butanediyl) And 1,1-Methylenebisisocyanatobenzene CAS NO 70851-35-3 is a specialized polyurethane prepolymer or polymer derived from a polyether polyol and an aromatic diisocyanate. This engineered material is valued for its ability to impart durability, flexibility, and chemical resistance to final formulations. It is primarily sought by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries for developing high-performance products.

Application

• High-Performance Coatings: Used as a key binder or prepolymer in polyurethane coatings for industrial, automotive, and marine applications, offering excellent weatherability and abrasion resistance.
• Adhesives & Sealants: Serves as a base polymer in formulating structural adhesives, flexible sealants, and potting compounds, providing strong bonding and elasticity.
• Elastomers and Castable Urethanes: A critical component in the production of polyurethane elastomers for rollers, wheels, gaskets, and impact-absorbing parts.
• Composite Materials: Acts as a matrix resin or modifier in fiber-reinforced composites, enhancing interlaminar strength and toughness.
• Waterproofing Membranes: Utilized in liquid-applied roofing and waterproofing systems due to its inherent moisture-curing properties and durability.
• Industrial and Maintenance Paints: Formulated into protective coatings for concrete, steel, and other substrates in harsh chemical or outdoor environments.

Basic Information

Item	Details
Product Name	1,3-Propanediol, 2-Ethyl-2-(Hydroxymethyl)-, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,4-Butanediyl) And 1,1-Methylenebisisocyanatobenzene
CAS No.	70851-35-3
Molecular Formula	Complex Polymer (Contact for details)
Molecular Weight	Polymer (Variable)
Synonyms	Polyurethane prepolymer based on PTMEG and MDI; Poly(tetramethylene ether glycol)-MDI prepolymer; PTMEG-MDI prepolymer; Polyether urethane prepolymer; Aliphatic polyether-based urethane polymer; MDI-terminated poly(tetramethylene oxide); 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 polymer adheres to strict batch-to-batch consistency protocols. Quality is monitored through key parameters including NCO content, viscosity, solids content, and color. A comprehensive Certificate of Analysis (COA) detailing these specifications is provided with every shipment to ensure it meets your formulation 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). This product is hygroscopic (moisture-sensitive) and light-sensitive; prolonged exposure to atmospheric moisture or direct light can affect its reactivity and properties. Keep away from heat sources and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
NCO Content	Contact for details
Viscosity (25°C)	Contact for details
Solids Content	~100% (Reactive prepolymer)
Color (Gardner)	≤ 3
Specific Gravity (25°C)	Contact for details
Moisture Content	≤ 0.05%

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