Acrylic paint is a water-soluble, fast-drying paint made up of pigment suspended in acrylic polymer emulsion . These paints are water-soluble but have water-resistant properties when they dry. Acrylic painting can resemble a water-colour, opaque water or an oil painting depending on how much the paint is diluted with water or modified with any other medium like gel, mediums or pastes.
The pure acrylic emulsion belongs to the group of polymer emulsions. An emulsion is a stable mixture of components that do not mix well together. For example – oil and water can be mixed together, but after some time they settle down and separate. To force the water and acrylic polymer into a stable mixture, chemical emulsifiers are added until the water evaporates or gets absorbed. Usually, emulsions do not exhibit a static nature as they are liquids. Some other easy to identify examples of emulsions are – vinaigrettes, mayonnaise and homogenized milk.
Acrylic emulsion is a milky white polymer emulsion that is mainly produced when acrylic monomer undergoes polymerization by using an initiator in the presence of emulsifier with water as a solvent. Acrylic polymer emulsions are a water-based polymer that can be produced from methyl methacrylate, butyl acrylate, 2-Ethylhexyl acrylate, acrylic acid, methyl acrylate etc. polymers with specific attributes for a variety of applications or uses can be produced by choosing appropriate hard and soft monomers.
Emulsion paints are formulated using acrylic polymer emulsion, in the presence of ammonium persulfate, Dodecyl mercaptan, Potassium persulfate, anionic Dioctyl sulfosuccinate as surfactant and aerosol. The emulsion polymerization of acrylics with NaCN cellulose as protective colloid was used as binders for gloss paints of special rheological behaviour.
The work has shown that there was good compatibility between the binder and the pigment during paint formulation. This accounts for the good opacity and deep colour for paints formulated. The formulated paints were characterized for Physico-chemical properties like viscosity, gloss, hot box stability, gloss retention, opacity, colour, scrub resistance, adhesion etc. which yielded positive results showing that they could be used for indoor and outdoor coatings.
The basic difference is their material that is they are made up of different material.