methylacrylaat

Methyl acrylate, also known as methyl acrylate ester, is an organic compound with the chemical formula C4H6O2 and the structure CH2=CH-COO-CH3. It is the methyl ester of acrylic acid and functions as a reactive vinyl monomer used in polymer synthesis. At room temperature it is a colorless, volatile liquid with a sharp odor. It is moderately soluble in water and highly soluble in many organic solvents.

Production and handling

Methyl acrylate is produced primarily by esterification of acrylic acid with methanol in the presence of an acid catalyst, followed by purification and removal of water. In commercial practice, inhibitors such as hydroquinone monomethyl ether or tert-butylcatechol are added to suppress premature polymerization during storage and transport. The liquid is flammable and should be handled with appropriate engineering controls, personal protective equipment, and away from sources of heat or ignition.

polymerization and reactivity

Methyl acrylate readily undergoes free-radical polymerization, especially under heat, light, or elevated concentrations of initiators. This exothermic process can occur rapidly, which is why stabilizers are important and polymerization is typically inhibited during storage. It can also react with water under acidic or basic conditions, slowly hydrolyzing to acrylic acid and methanol.

Applications

As a monomer, methyl acrylate is used to prepare poly(methyl acrylate) and copolymers with styrene, acrylonitrile, butadiene, and other monomers. These polymers find use in coatings, adhesives, sealants, and specialty resins. It is also employed in UV-curable coatings and in certain hydrogel and specialty applications where ester groups are advantageous.

Safety and environmental aspects

Methyl acrylate is flammable and can irritate skin, eyes, and the respiratory tract. Adequate ventilation and containment are essential, and proper disposal procedures should be followed to minimize environmental impact.