Description

Octadecyl Methacrylate is a long-chain alkyl methacrylate monomer, also known as stearyl methacrylate. This compound is valued for its ability to impart hydrophobicity, flexibility, and low surface energy to polymer chains, making it a crucial building block for specialty materials. It is primarily utilized by formulators and manufacturers in the coatings, adhesives, and plastics industries seeking to enhance product performance.

Application

• Coatings & Inks: A key monomer for producing low-VOC, high-performance acrylic resins used in automotive, industrial, and architectural coatings to improve water repellency, gloss, and flexibility.
• Adhesives & Sealants: Incorporated into pressure-sensitive adhesives (PSAs) and sealant formulations to enhance tack, peel strength, and resistance to plasticizer migration.
• Plastics & Polymer Modification: Used as a comonomer to modify the properties of polymers like PVC, PMMA, and polyolefins, increasing impact resistance and reducing brittleness.
• Lubricant & Fuel Additives: Serves as a precursor for viscosity index improvers and pour-point depressants in lubricating oils and industrial fluids.
• Textile & Leather Finishing: Employed in treatments to provide durable water and stain repellency to fabrics and leather goods.
• Personal Care Polymers: Used in the synthesis of polymers for hair styling, skincare, and cosmetic formulations to provide film-forming and conditioning properties.

Basic Information

Product Name	Octadecyl Methacrylate
CAS No.	112-08-3
Molecular Formula	C22H42O2
Molecular Weight	338.57 g/mol
Synonyms	Stearyl Methacrylate; n-Octadecyl Methacrylate; Methacrylic Acid, Octadecyl Ester; SMA; ODA; 2-Methyl-2-propenoic Acid Octadecyl Ester; Stearyl 2-Methylpropenoate; SR 242; Light Ester S
EINECS	203-934-6

Quality Control

Our Octadecyl Methacrylate is produced under a stringent quality management system. Every batch undergoes comprehensive analytical testing, including assay, purity, and identity confirmation, to ensure it meets precise specifications for industrial and specialty applications. Certificates of Analysis (COA) documenting all critical parameters 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 temperatures between 15-25°C (59-77°F). This product is easily oxidized and should be stored under an inert atmosphere (e.g., nitrogen) when not in use. Keep away from heat, sparks, and open flames. For long-term storage, monitor for polymerization inhibitors.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Acid Value	≤ 1.0 mg KOH/g
Color (APHA)	≤ 50
Water Content	≤ 0.1%
Inhibitor (MEHQ)	50 - 100 ppm

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