Description

1,3-Dimethyl 5-sulfo-1,3-benzenedicarboxylate sodium salt polymer with 1,3-benzenedicarboxylic acid, 1,4-benzenedicarboxylic acid, 2,2-dimethyl-1,3-propanediol and 1,2-ethanediol is a specialized sulfonated copolyester designed to impart unique ionic functionality and solubility characteristics. This engineered polymer is valued for its ability to modify surface properties and enhance compatibility in complex formulations. It serves as a critical functional additive in advanced material science, particularly for industries requiring precise control over hydrophilicity and ionic interactions.

Application

• Dispersant and Stabilizer for pigments and fillers in high-performance coatings and inks.
• Compatibilizer in polymer blends and composites to improve interfacial adhesion between dissimilar materials.
• Functional Additive for ion-exchange membranes and materials used in separation technologies.
• Surface Modifier to enhance the hydrophilicity and antistatic properties of synthetic fibers and films.
• Rheology Modifier and processing aid in specialty plastic and resin formulations.
• Intermediate for the synthesis of more complex, value-added polymeric materials with tailored ionic content.

Basic Information

Item	Details
Product Name	1,3-Dimethyl 5-sulfo-1,3-benzenedicarboxylate sodium salt polymer with 1,3-benzenedicarboxylic acid, 1,4-benzenedicarboxylic acid, 2,2-dimethyl-1,3-propanediol and 1,2-ethanediol
CAS No.	91601-34-2
Molecular Formula	(C11H9NaO7S · C8H6O4 · C8H6O4 · C5H12O2 · C2H6O2)n
Molecular Weight	Polymer - Contact for details
Synonyms	Sulfonated Polyester Ionomer; Poly(1,3-benzenedicarboxylic acid-co-1,4-benzenedicarboxylic acid-co-2,2-dimethyl-1,3-propanediol-co-ethanediol), 5-sulfo-1,3-benzenedicarboxylate sodium salt; Sodium 5-sulfoisophthalic acid dimethyl ester copolymer; Ionic Copolyester; SPES (Sulfonated Polyester); AQ Polymer; Eastman AQ; Water-Dispersible Sulfopolyester
EINECS	Contact for details

Quality Control

Our production of this sulfonated copolyester adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is characterized for critical parameters including ionic content, molecular weight distribution, and solution viscosity. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance specifications is provided with every shipment to support your quality assurance and regulatory compliance 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). Minimize exposure to high humidity to prevent caking and maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white powder or granules
Identification (IR)	Conforms to structure
Sulfonate Content	Contact for details
Inherent Viscosity	Contact for details
Moisture Content	< 2.0% (Karl Fischer)
pH (in solution)	Contact for details
Solubility	Soluble in water and polar organic solvents

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