Description

1,3-Benzenedicarboxylic acid, 5-sulfo-, monosodium salt, polymer with 1,3-benzenedicarboxylic acid, 1,4-benzenedicarboxylic acid, 2,2-dimethyl-1,3-propanediol, 1,2-ethanediol and hexanedioic acid is a specialized sulfonated copolyester designed to impart unique ionic functionality and enhanced solubility to polymer matrices. This engineered material is valued for its ability to modify surface properties, improve dyeability, and introduce controlled hydrophilicity in high-performance coatings and fibers. It serves as a critical functional additive for manufacturers in the textile, specialty coatings, and advanced material sectors seeking to develop products with specific ionic characteristics and processing advantages.

Application

• Textile Fiber Modification: As a copolymer component to introduce permanent cationic dye sites or improve moisture management in synthetic fibers like polyester.
• Specialty Coatings & Inks: To enhance adhesion, dispersibility, and antistatic properties in water-based or solvent-based coating formulations.
• Ion-Exchange Materials: Serving as a precursor or functional component in the manufacture of membranes or resins for selective ion separation processes.
• Polymer Additive: Used to modify the hydrophilicity, antistatic behavior, or compatibility of engineering plastics and composites.
• Dispersing Agent: Acting as a surfactant or stabilizer in pigment and filler dispersions for various industrial applications.

Basic Information

Item	Details
Product Name	1,3-Benzenedicarboxylic acid, 5-sulfo-, monosodium salt, polymer with 1,3-benzenedicarboxylic acid, 1,4-benzenedicarboxylic acid, 2,2-dimethyl-1,3-propanediol, 1,2-ethanediol and hexanedioic acid
CAS No.	72765-57-2
Molecular Formula	(C8H5O7SNa · C8H6O4 · C8H6O4 · C5H12O2 · C2H6O2 · C6H10O4)n
Molecular Weight	Polymer - Contact for details
Synonyms	Sulfoisophthalic Acid, Sodium Salt, Copolyester; Poly(ethylene-co-neopentyl glycol-co-sulfoisophthalate-co-terephthalate-co-isophthalate-co-adipate); Sodium 5-Sulfoisophthalate Copolyester; Ionic Polyester Copolymer; Sulfonated Polyester Resin; SPET; Copolyester Containing 5-Sodiosulfoisophthalic Acid; Water-Dispersible Polyester
EINECS	Contact for details

Quality Control

Our production of this functional copolymer adheres to rigorous quality testing protocols to ensure batch-to-batch consistency in ionic content, molecular weight distribution, and performance characteristics. While typically produced to industrial grade specifications, parameters such as sulfonation degree, acid value, and viscosity are strictly controlled. Certificates of Analysis (COA) detailing key specifications are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed when not in use to prevent moisture absorption, which can affect flow properties and performance.

Specification

Item	Specification
Appearance	White to off-white powder or granules
Identification (IR)	Conforms to structure
Sulfur Content (as SO3Na)	Contact for details
Acid Value	Contact for details
Inherent Viscosity	Contact for details
Moisture Content (Karl Fischer)	≤ 2.0%
Ash Content	Contact for details

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