Description

1,3-Benzenedicarboxylic acid, 5-sulfo-, 1,3-dimethyl ester, sodium salt, polymer with 1,3-benzenedicarboxylic acid, 1,4-cyclohexanedimethanol and 2,2'-oxybis[ethanol] is a specialized sulfonated copolyester, known under CAS NO 63512-23-2. This engineered polymer is valued for its unique combination of ionic character and polyester backbone, offering enhanced hydrophilicity and compatibility in demanding formulations. It is primarily sought by industrial manufacturers for advanced material science applications where surface modification, dispersion, or controlled release properties are critical.

Application

• Functional Polymer Additive: Used as a compatibilizer or processing aid in polyester and polycarbonate blends to improve dispersion and mechanical properties.
• Surface Modification Agent: Imparts hydrophilic characteristics to films, fibers, and coatings for improved wettability and adhesion.
• Dispersant for Pigments and Fillers: Enhances the stability and uniformity of inorganic particles in polymer matrices and coating systems.
• Membrane Technology: A key component in the formulation of specialty separation membranes requiring controlled porosity and surface charge.
• Controlled-Release Matrices: Utilized in agricultural or pharmaceutical formulations where a sulfonated polymer matrix aids in the timed release of active ingredients.
• Adhesive and Sealant Formulations: Contributes to the performance of high-strength, moisture-resistant adhesives.

Basic Information

Product Name	1,3-Benzenedicarboxylic acid, 5-sulfo-, 1,3-dimethyl ester, sodium salt, polymer with 1,3-benzenedicarboxylic acid, 1,4-cyclohexanedimethanol and 2,2'-oxybis[ethanol]
CAS No.	63512-23-2
Molecular Formula	(C10H7NaO7S · C8H6O4 · C8H14O2 · C4H10O3)n
Molecular Weight	Polymer - Contact for details
Synonyms	Sulfonated Polyester Copolymer; Poly(1,4-cyclohexylenedimethylene terephthalate-co-sulfoisophthalate) sodium salt; SPET; Water-dispersible sulfopolyester; Sodium sulfoisophthalic acid dimethyl ester copolymer; Polyester ionomer; AQ polymer (related trade series); Copolyester sulfonate sodium salt
EINECS	Contact for details

Quality Control

Our production of this sulfonated copolyester adheres to stringent quality management protocols. Each batch undergoes comprehensive analysis to ensure consistent ionic content, molecular weight distribution, and thermal properties. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting key parameters such as sulfonation degree, inherent viscosity, and glass transition temperature (Tg).

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry place at a controlled room temperature (15-25°C). Ensure the storage area is well-ventilated and away from incompatible materials. Use original packaging and reseal containers immediately after use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to pale yellow granules or powder
Identification (IR)	Conforms to structure
Sulfonation Degree	Contact for details
Inherent Viscosity	Contact for details
Glass Transition Temp (Tg)	Contact for details
Moisture Content	< 2.0% (Karl Fischer)
Residual Solvents	Meets ICH guidelines

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