Description

1,3-Butanediol, Polymer With 1,1'-Methylenebis[4-Isocyanatobenzene], [(1-Methyl-1,2-Ethanediyl)Bis(Oxy)]Bis[Propanol] And 1,2-Propanediol is a specialized polyurethane prepolymer or polyol-based resin intermediate. This compound is engineered to deliver precise reactivity and tailored physical properties for advanced material formulations. It is primarily required by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to enhance product performance, durability, and application characteristics.

Application

• High-Performance Polyurethane Coatings: Used as a key resin component in industrial, automotive, and protective coatings for superior gloss, chemical resistance, and weatherability.
• Specialty Adhesives & Sealants: Serves as a building block in formulating flexible, strong-bonding adhesives and durable sealants for construction and automotive assembly.
• Elastomer Production: Acts as a precursor in the synthesis of polyurethane elastomers used in wheels, rollers, gaskets, and impact-absorbing materials.
• Composite Materials: Incorporated into resin systems for fiber-reinforced plastics (FRP) and other composites to modify toughness and processing behavior.
• Binder for Advanced Materials: Utilized in the production of specialty foams, non-woven binders, and other engineered polymeric materials.

Basic Information

Item	Detail
Product Name	1,3-Butanediol, Polymer With 1,1'-Methylenebis[4-Isocyanatobenzene], [(1-Methyl-1,2-Ethanediyl)Bis(Oxy)]Bis[Propanol] And 1,2-Propanediol
CAS No.	70644-57-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Polyurethane prepolymer based on 1,3-Butanediol, MDI, and polyols; Polyol-modified MDI prepolymer; 1,3-Butanediol/MDI/polypropylene glycol copolymer; Urethane polymer of 1,3-butanediol, 4,4'-methylenebis(phenyl isocyanate), and propoxylated propanediol; CAS 70644-57-4; Reactive polyurethane resin intermediate; Polyether polyol-MDI adduct
EINECS	Contact for details

Quality Control

Our production of this 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 color are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all relevant 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 room temperature (15-25°C / 59-77°F). This material is hygroscopic (moisture-sensitive); containers must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Viscous liquid
Color (Gardner)	≤ 3
Viscosity (at 25°C)	Contact for details
NCO Content	Contact for details
Hydroxyl Value (mg KOH/g)	Contact for details
Solid Content	Contact for details
Moisture Content (Karl Fischer)	≤ 0.1%

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