This type of resin is normally used in the form of the copolymer, e.g. with ethyl, propyl, butyl and isobutyl methacylate, as well as with the corresponding acrylates, in other words acrylic acid esters. There are therefore products with a wide range of properties, ranging from hard and birtle to soft and flexible in character.
These materials are nearly all colourless and light resistant, and soluble in polar solvents. Very few of them are also soluble in aromatic and even in aliphatic solvents. All are used in solution form, films being produced through physical drying. By incorporating a reactive group into the molecule, it is possible to prepare reactive binders. Acrylamide has proved to be a suitable component for this purpose. Radiation- curing binders include, for example, polymethacrylates dissolved in the appropriate monomer rather than in solvents.