Description

Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,4-Diisocyanatobenzene CAS NO 89339-41-3 is a specialized polyurethane prepolymer or block copolymer derived from poly(tetramethylene ether) glycol (PTMEG) and p-phenylene diisocyanate (PPDI). This engineered polymer is valued for its unique combination of elastomeric properties, chemical resistance, and thermal stability, making it a critical performance material. It is primarily sought after by manufacturers in the high-performance elastomers, specialty adhesives, coatings, and medical device sectors where durability under demanding conditions is essential.

Application

• High-Performance Elastomers and Thermoplastic Polyurethanes (TPU): Used as a key intermediate for producing fibers, films, and molded parts requiring excellent tensile strength, abrasion resistance, and low-temperature flexibility.
• Specialty Adhesives and Sealants: Serves as a base polymer for formulating adhesives with strong bonding characteristics and resistance to oils, solvents, and hydrolysis.
• Engineered Coatings: Employed in protective and functional coatings for textiles, industrial equipment, and automotive components to enhance durability and chemical resistance.
• Medical Device Components: Utilized in the manufacture of biocompatible tubing, catheters, and other devices where purity, flexibility, and stability are paramount.
• Impact Modifiers and Additives: Acts as a modifier in other polymer systems to improve toughness, flexibility, and processing characteristics.

Basic Information

Product Name	Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,4-Diisocyanatobenzene
CAS No.	89339-41-3
Molecular Formula	(C4H8O)n•C8H4N2O2 (Polymer)
Molecular Weight	Varies by grade (Contact for details)
Synonyms	PTMEG-PPDI Prepolymer; Poly(tetramethylene ether) glycol-p-phenylene diisocyanate polymer; Poly(oxytetramethylene) glycol-p-phenylenediisocyanate copolymer; PPDI-PTMEG copolymer; 1,4-Diisocyanatobenzene polymer with .alpha.-hydro-.omega.-hydroxypoly(oxy-1,4-butanediyl); Polyurethane prepolymer based on PTMEG and PPDI; 4,4'-Methylenebis(phenyl isocyanate) alternative polymer
EINECS	Contact for details

Quality Control

Our production of this polymer adheres to strict quality management systems. Each batch is characterized for critical parameters including isocyanate (NCO) content, hydroxyl value, viscosity, and residual monomer levels to ensure consistency and performance. Certificates of Analysis (COA) documenting these specifications are available upon request, supporting 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 temperatures recommended for the specific grade (typically 15-25°C). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept sealed under a dry inert atmosphere (e.g., nitrogen) after opening to prevent moisture absorption and polymerization.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid or solid
Identification (IR)	Conforms to structure
Isocyanate (NCO) Content	As per grade (Contact for details)
Hydroxyl Value (mg KOH/g)	As per grade (Contact for details)
Viscosity @ 25°C (cP)	Reported per COA
Residual Monomer (PPDI)	< 0.1% (or as per grade)
Moisture (Karl Fischer)	< 0.05%

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