Methyl methacrylate adhesives are the main family of structural acrylics, used for bonding boat hulls to decks, truck body panels, wind blade parts, signs and composites. In conversation MMA names the adhesive type rather than the chemical. The monomer has a sharp, fruity odor at low concentrations, and MMA cells usually need local exhaust. Grades are rated by open time and fixture time.
Bonding the deck flange with the 45-minute MMA so we have time to set the whole length.
Also heard as
- methyl methacrylate
- methacrylate
Related terms
Structural acrylic
A fast-curing two-part methacrylate adhesive that bonds metals, plastics and composites with little surface prep.
Exotherm
The heat released by a curing adhesive, which speeds the reaction and can overheat thick masses.
Open time
The longest gap allowed between applying adhesive and closing the joint while it can still wet the second part.
Fixture time
The time until a bond is strong enough to handle or unclamp the assembly without moving the parts.