Description

1,3-Butanediol, Polymer With 2,4-Diisocyanato-1-Methylbenzene And .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,4-Butanediyl) CAS NO 56602-86-9 is a specialized polyurethane prepolymer or block copolymer derived from 1,3-butanediol, toluene diisocyanate (TDI), and a poly(tetramethylene ether) glycol (PTMEG). This engineered material is valued for its unique combination of flexibility, toughness, and chemical resistance derived from its segmented polymer structure. It is primarily sought by formulators in the adhesives, sealants, coatings, and elastomers industries for developing high-performance polyurethane systems.

Application

• High-Performance Polyurethane Elastomers: Used as a key prepolymer component to manufacture flexible, durable elastomers for industrial parts, rollers, and wheels.
• Specialty Adhesives & Sealants: Serves as a base resin in formulating strong, moisture-curing adhesives and sealants with excellent adhesion and environmental resistance.
• Protective & Functional Coatings: Incorporated into coating formulations to provide abrasion resistance, flexibility, and chemical protection for surfaces in demanding environments.
• Thermoplastic Polyurethane (TPU) Modification: Acts as a modifier or chain extender to tailor the hardness, elasticity, and processing characteristics of TPU compounds.
• Fiber & Textile Finishing: Utilized in coatings for synthetic fibers to enhance durability, water repellency, and feel.
• Composite Material Binder: Functions as a polymeric binder in composite materials, contributing to matrix toughness and interlayer bonding.

Basic Information

Product Name	1,3-Butanediol, Polymer With 2,4-Diisocyanato-1-Methylbenzene And .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,4-Butanediyl)
CAS No.	56602-86-9
Molecular Formula	Contact for details
Molecular Weight	Variable (Polymer)
Synonyms	Polyurethane prepolymer based on 1,3-butanediol and TDI; PTMEG-TDI-1,3-BDO copolymer; Poly(tetramethylene ether) glycol-toluene diisocyanate-1,3-butanediol copolymer; α-Hydro-ω-hydroxypoly(oxy-1,4-butanediyl), polymer with 1,3-butanediol and 2,4-diisocyanato-1-methylbenzene; Polyurethane resin (PTMEG type); Block copolymer of PTMEG, TDI, and 1,3-butanediol; 1,3-Butanediol, polymer with 2,4-toluene diisocyanate and PTMEG
EINECS	Contact for details

Quality Control

Our production of this polymer adheres to strict batch-to-batch consistency protocols. Quality is verified through parameters including NCO content, viscosity, hydroxyl value, and residual monomer levels. A comprehensive Certificate of Analysis (COA) detailing the specific grade's properties is provided with every shipment to ensure it meets your formulation requirements.

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). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature reaction. Isolate from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
NCO Content	Specification available upon request
Viscosity (25°C)	Specification available upon request
Hydroxyl Value	Specification available upon request
Specific Gravity (25°C)	Specification available upon request
Residual TDI (HPLC)	< 0.1%
Moisture (Karl Fischer)	< 0.05%

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