Overview
2-Methylacrylic acid solution, commonly referred to as methacrylic acid (MAA) solution, is an industrial chemical primarily used as a monomer for polymer production. As an α,β-unsaturated carboxylic acid, it readily undergoes polymerization and copolymerization reactions. The commercial solution typically contains stabilizers (such as hydroquinone derivatives) to prevent premature polymerization during storage and transportation. Industrial grades usually range from 80% to 99% purity, with water being the primary diluent in lower-concentration formulations.
Physical and Chemical Properties
The solution exhibits characteristic properties of methacrylic acid: a pungent odor, high reactivity due to its double bond and carboxylic group, and moderate viscosity. Its miscibility with common organic solvents makes it versatile for formulation work. Key chemical behaviors include its tendency to polymerize exothermically when exposed to heat or initiators, and its ability to form esters through standard carboxylate reactions. The acid is moderately strong (pKa ≈4.66) and forms stable salts with various cations.
Main Applications
Approximately 75% of MAA solution consumption goes into polymethacrylate production, including PMMA (plexiglass) and impact modifiers. In coatings and adhesives, it improves weather resistance and adhesion properties. The textile industry utilizes MAA for fiber modification, while the electronics sector employs it in photoresist formulations. Emerging applications include biomedical materials and controlled-release drug delivery systems where its polymerization characteristics are particularly valuable.
Safety and Storage
As a Category 8 corrosive substance, MAA solution requires corrosion-resistant storage tanks (stainless steel or polyethylene) and secondary containment. The stabilized version typically contains 200-250 ppm MEHQ inhibitor. For safe handling, facilities should maintain temperature below 30°C using cooling systems if necessary, and monitor inhibitor levels regularly. Fire protection systems must account for both flammability (flash point 76°C) and polymerization hazards.
B2B Procurement Guide
Industrial buyers should specify: required concentration (affecting shipping costs and handling), inhibitor type/level (critical for storage stability), and metal ion content (affects polymerization quality). Bulk shipments (ISO tanks or tank trucks) offer cost advantages for regular users, while intermediate bulk containers (IBCs) suit smaller-scale operations. Quality certifications should include analysis reports for purity, water content, and inhibitor concentration.
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