Description

Poly(Styrene-Co-Maleic Acid), Partial sec-Butyl/Methyl Mixed Ester is a synthetic copolymer designed for superior performance as a dispersant, emulsifier, and rheology modifier. This compound matters for its unique amphiphilic structure, which provides excellent compatibility and stabilization in complex formulations. Industries requiring advanced surface-active agents, such as coatings, inks, and specialty polymer processing, will find this product essential for enhancing product stability and performance.

Application

• Industrial Coatings & Inks: Acts as a high-performance dispersant and grinding aid for pigments, improving color strength and stability.
• Adhesives & Sealants: Functions as a rheology modifier and tackifier, enhancing application properties and final bond strength.
• Polymer Additives: Used as a compatibilizer and processing aid in polymer blends and composites to improve mechanical properties.
• Oilfield Chemicals: Serves as a component in drilling fluid additives and demulsifiers for crude oil processing.
• Agricultural Formulations: Employed as an emulsifier and stabilizer in pesticide and herbicide concentrates.
• Textile & Leather Processing: Utilized as a leveling agent and dye dispersant to ensure uniform color application.

Basic Information

Product Name	Poly(Styrene-Co-Maleic Acid), Partial sec-Butyl/Methyl Mixed Ester
CAS No.	65652-36-0
Molecular Formula	(C8H8·C4H4O4)x
Molecular Weight	Variable (Polymer)
Synonyms	Styrene Maleic Anhydride Partial sec-Butyl/Methyl Ester; SMA® Partial Ester; PSMA Partial Ester; Styrene/Maleic Acid Copolymer Partial Ester; Poly(styrene-alt-maleic acid) Partial sec-Butyl/Methyl Ester; SMA Resin Ester; SMA Copolymer Ester; Dispersant SMA Ester
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure batch-to-batch consistency and compliance with industry standards. Key parameters such as acid value, esterification degree, molecular weight distribution, and viscosity are strictly monitored. Certificates of Analysis (COA) detailing all test results are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong acids and organic solvents. The container must be kept tightly closed to prevent moisture absorption.

Specification

Item	Specification
Appearance	Off-white to light yellow flakes or powder
Identification (IR)	Conforms to structure
Acid Value	Contact for details
Esterification Degree	Contact for details
Viscosity (Solution)	Contact for details
Molecular Weight (Mw)	Contact for details
Moisture Content	< 2.0%
Residue on Ignition	< 0.5%

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