Mesamoll

This substance is typically encountered as a clear, colorless to pale yellowish oily liquid with a faint characteristic odor. Its average molecular formula is often represented as C21H36O3S, corresponding to an approximate molecular weight of 368.57. It is a complex mixture of alkylsulfonic acid esters with phenol. The product exhibits low volatility and high boiling point, typically distilling above 200°C at reduced pressure. It is freely miscible with most common organic solvents including mineral oils, hydrocarbons, esters, and ketones, but is practically insoluble in water and glycerol. The ester bonds are susceptible to hydrolysis under strongly acidic or basic conditions, particularly at elevated temperatures. It demonstrates good thermal stability and resistance to oxidation under normal processing conditions. Storage in tightly sealed containers away from moisture and strong oxidizing agents at ambient temperature is generally adequate.

Mesamoll is a technical mixture of phenyl esters of long-chain alkylsulfonic acids, commonly referred to as an alkylsulfonic acid phenyl ester. It belongs to the class of sulfonic acid esters, which are characterized by the presence of a sulfonyl group (SO2) linking an alkyl chain to a phenyl ring via an oxygen atom. This structure imparts a unique combination of properties, including high solvating power, good compatibility with various polymers, and excellent resistance to saponification compared to conventional phthalate esters. The long alkyl chains contribute to its plasticizing efficiency and low volatility, while the phenyl ester moiety ensures good miscibility with polar polymers. Its complex composition, consisting of a range of alkyl chain lengths, provides a broad performance profile and makes it particularly suitable as a plasticizer for polyvinyl chloride and other thermoplastics. It is known for its ability to impart good low-temperature flexibility and resistance to extraction by oils and fats.

Plasticizer for PVC and Copolymers
Mesamoll is primarily employed as a monomeric plasticizer in the production of flexible polyvinyl chloride and vinyl chloride copolymers. It imparts excellent flexibility, good low-temperature properties, and reduced migration compared to many phthalate-based plasticizers. It is particularly valued in applications requiring resistance to saponification, such as in flooring, wall coverings, and coated fabrics where contact with alkaline materials like concrete or plaster may occur.

Sealants and Adhesives
In the formulation of sealants and adhesives, this compound acts as a non-migrating plasticizer that enhances flexibility and adhesion while maintaining durability. It is used in polyurethane, acrylic, and polysulfide-based systems for construction and automotive applications. Its low volatility ensures long-term performance without significant loss of flexibility over time.

Coatings and Inks
The product serves as a film-forming aid and plasticizer in surface coatings and printing inks. It improves film flexibility, substrate adhesion, and gloss while reducing brittleness. Its good solvating power allows for high solids formulations with reduced volatile organic compound content, contributing to more environmentally friendly coating systems.

Rubber and Elastomer Processing
In rubber and elastomer compounds, Mesamoll functions as a processing aid and plasticizer, improving flow characteristics during mixing and shaping operations. It enhances the low-temperature flexibility of finished rubber articles and shows good compatibility with various synthetic rubbers, including nitrile rubber and chloroprene rubber, where it contributes to improved oil and fuel resistance.