Description

5-Sulfo-1,3-benzenedicarboxylic acid, monosodium salt polymer with 1,4-benzenedicarboxylic acid, 1,4-butanediol, 1,2-ethanediol, hexane dioic acid and α-hydro-ω-hydroxypoly(oxy-1,4-butanediyl) is a specialized sulfonated aromatic copolyester designed to impart unique ionic and hydrophilic characteristics to polymer matrices. This engineered material is critical for formulators seeking to modify surface properties, enhance compatibility, or introduce functional sites for further chemical reactions. It is primarily utilized in advanced industrial applications where precise control over polymer performance is required.

Application

• Functional Polymer Additive: Used as a compatibilizer or property modifier in engineering plastics and high-performance polyester blends.
• Membrane Technology: A key component in the formulation of ion-exchange or charged separation membranes for filtration and electrodialysis processes.
• Coating and Adhesive Formulations: Enhances adhesion to polar substrates and improves moisture management in specialty coatings and adhesives.
• Textile Finishing: Imparts durable hydrophilic and antistatic properties to synthetic fibers and fabrics.
• Dispersing Agent: Acts as a high-performance dispersant for pigments and fillers in demanding aqueous and solvent-based systems.
• Research & Development: Serves as a building block for synthesizing novel polymeric materials with tailored ionic content and functionality.

Basic Information

Product Name	5-Sulfo-1,3-benzenedicarboxylic acid, monosodium salt polymer with 1,4-benzenedicarboxylic acid, 1,4-butanediol, 1,2-ethanediol, hexane dioic acid and α-hydro-ω-hydroxypoly(oxy-1,4-butanediyl)
CAS No.	84189-54-8
Molecular Formula	Polymeric substance; contact for specific formula details.
Molecular Weight	Variable (Polymer)
Synonyms	Sulfonated Poly(butylene terephthalate) Copolyester; Poly(butylene terephthalate-co-sulfoisophthalate); 5-Sodiosulfoisophthalic Acid Copolymer; Poly(tetramethylene terephthalate-co-sodio-5-sulfoisophthalate); PBT Sulfonate Copolymer; Ionic Polyester; AQ Polymer (related trade series); Thermoplastic Copolyester with Ionic Groups
EINECS	Contact for details

Quality Control

Our production of this advanced polymer adheres to strict quality management systems to ensure batch-to-batch consistency in ionic content, molecular weight distribution, and thermal properties. Each lot is characterized using advanced analytical techniques, and a comprehensive Certificate of Analysis (COA) detailing key specifications is provided to guarantee it meets your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Due to its hygroscopic nature, store in a cool, dry place at room temperature (15-25°C/59-77°F). Minimize exposure to high humidity during handling to prevent moisture uptake, which can affect processing and performance.

Specification

Item	Specification
Appearance	Off-white to pale yellow pellets or granules
Sulfonation Degree (Ionic Content)	Contact for details
Inherent Viscosity	Specified range available
Melting Point (DSC)	Contact for details
Moisture Content	< 1.0% (Karl Fischer)
Ash Content	Specified range available

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