Description

1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-, polymer with .alpha.-hydro-.omega.-hydroxypoly[oxy(methyl-1,2-ethanediyl)], 1,1'-methylenebis[4-isocyanatobenzene] and oxybis[propanol] is a specialized polyurethane prepolymer or polyol derivative, identified by CAS NO 70682-75-6. This engineered polymer is valued for its ability to impart enhanced flexibility, toughness, and chemical resistance to final polyurethane formulations. It is a critical raw material for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to develop high-performance, durable products.

Application

• High-Performance Coatings: Used as a key component in polyurethane coatings for industrial, automotive, and marine applications, providing excellent weatherability and abrasion resistance.
• Specialty Adhesives & Sealants: Serves as a base polymer for formulating flexible, strong-bonding adhesives and durable, waterproof sealants.
• Elastomer Production: Employed in the manufacture of cast, thermoplastic, or millable polyurethane elastomers for gaskets, wheels, and industrial parts.
• Composite Materials: Acts as a matrix resin or modifier in fiber-reinforced composites, enhancing impact strength and interfacial adhesion.
• Flexible Foams: Can be used as a polyol component in the production of specialized flexible polyurethane foams requiring specific resilience and load-bearing properties.
• Potting & Encapsulation Compounds: Formulated into systems for protecting electronic components, offering a balance of flexibility and environmental protection.

Basic Information

Product Name	1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-, polymer with .alpha.-hydro-.omega.-hydroxypoly[oxy(methyl-1,2-ethanediyl)], 1,1'-methylenebis[4-isocyanatobenzene] and oxybis[propanol]
CAS No.	70682-75-6
Molecular Formula	Complex Polymer / Mixture
Molecular Weight	Varies by grade and formulation
Synonyms	Polyurethane polyol based on TMP and MDI; Trimethylolpropane (TMP) started polyether polyol, MDI terminated; Polyoxypropylene triol, TMP started, reacted with MDI and diethylene glycol; Polyether polyurethane prepolymer; MDI-based polyurethane prepolymer; CAS 70682-75-6; Reactive polyurethane resin
EINECS	Contact for details

Quality Control

Our production of this polyurethane polymer 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 moisture content are rigorously tested. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C / 59-77°F). This product is hygroscopic (moisture-sensitive). Containers must be kept tightly sealed to prevent moisture absorption, which can affect reactivity and product performance. Keep away from heat, sparks, and open flame.

Specification

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

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