Description

5-Sulfo-1,3-Benzenedicarboxylic Acid, 1,3-Dimethyl Ester Sodium Salt Polymer With Dimethyl 1,4-Benzenedicarboxylate, 1,2-Ethanediol And 2,2'-Oxybis[Ethanol] is a specialized sulfonated copolyester, a high-performance polymer engineered for demanding applications. This compound matters for its unique combination of ionic character from the sulfonate group and the robust thermal and mechanical properties inherent to polyester backbones. It is primarily needed by industries focused on advanced material science, including membrane technology, specialty coatings, and as a dispersant or compatibilizer in complex polymer blends.

Application

• Ion-Exchange and Proton Exchange Membranes: A key material for fuel cells (PEMFC) and water electrolysis due to its ionic conductivity and chemical stability.
• Functional Polymer Additives: Acts as a permanent antistatic agent or dispersant in engineering plastics and films.
• Specialty Coatings and Adhesives: Imparts hydrophilicity, adhesion promotion, and tailored surface properties in high-performance coatings.
• Gas Separation and Pervaporation Membranes: Used in membrane fabrication for selective separation of gases or liquid mixtures.
• Polymer Electrolytes: Employed in solid-state battery research and electrochromic devices.
• Compatibilizer for Polymer Blends: Enhances the miscibility and interfacial adhesion in blends of polar and non-polar polymers.

Basic Information

Product Name	5-Sulfo-1,3-Benzenedicarboxylic Acid, 1,3-Dimethyl Ester Sodium Salt Polymer With Dimethyl 1,4-Benzenedicarboxylate, 1,2-Ethanediol And 2,2'-Oxybis[Ethanol]
CAS No.	63534-56-5
Molecular Formula	(C11H9NaO7S · C10H10O4 · C2H6O2 · C4H10O3)n
Molecular Weight	Polymer - Contact for details
Synonyms	Sulfonated Poly(ethylene terephthalate-co-sulfoisophthalate); Poly(ethylene terephthalate-co-sodium 5-sulfoisophthalate); SPET; Sulfonated Copolyester; Poly(ethylene terephthalate-co-3,5-dicarboxybenzenesulfonate sodium salt); AQ Polymer; Eastman AQ; AQ 55S; Water-Dispersible Polyester
EINECS	Contact for details

Quality Control

Our production of this advanced polymer adheres to rigorous quality testing protocols to ensure batch-to-batch consistency in ionic content, molecular weight distribution, and thermal properties. While specific grades are tailored to application needs, our standard quality commitment includes verification of sulfonation degree, intrinsic viscosity, and glass transition temperature. Certificates of Analysis (COA) detailing lot-specific data are available upon request.

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 polymer properties.

Specification

Item	Specification
Appearance	Off-white to pale yellow granules or powder
Identification (IR)	Conforms to structure
Sulfonation Degree (Ion Exchange Capacity)	1.0 - 3.0 meq/g (Grade Dependent)
Inherent Viscosity	0.4 - 0.8 dL/g (Grade Dependent)
Glass Transition Temperature (Tg)	40 - 70 °C
Moisture Content (Karl Fischer)	≤ 3.0 %
Ash Content	≤ 1.0 %

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