186 px, Polyhydroxyethylmethacrylate is a typical acrylate resin. An acrylic resin is a

thermoplastic A thermoplastic, or thermosoft plastic, is any plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. Most thermoplastics have a high molecular weight. The polymer chains associate ...

thermosetting plastic In materials science, a thermosetting polymer, often called a thermoset, is a polymer that is obtained by irreversibly hardening (" curing") a soft solid or viscous liquid prepolymer (resin). Curing is induced by heat or suitable radiation and ...

substance typically derived from

acrylic acid Acrylic acid (IUPAC: propenoic acid) is an organic compound with the formula CH2=CHCOOH. It is the simplest unsaturated carboxylic acid, consisting of a vinyl group connected directly to a carboxylic acid terminus. This colorless liquid has a ...

methacrylic acid Methacrylic acid, abbreviated MAA, is an organic compound. This colorless, viscous liquid is a carboxylic acid with an acrid unpleasant odor. It is soluble in warm water and miscible with most organic solvents. Methacrylic acid is produced indu ...

and acrylate monomers such as butyl acrylate and or methacrylate monomers such as methyl methacrylate. Thermoplastic acrylics designate a group of acrylic resins typically containing both a high molecular weight and a high glass transition temperature which exhibit lacquer dry capability. Acrylic resins designed for use in two component systems for crosslinking with isocyanate are referred to as polyols and are made with the monomers previously mentioned as well as hydroxy monomers such as hydroxy ethyl methacrylate. Acrylic resins are produced in different liquid carriers such as a hydrocarbon solvent (solventborne acrylics or solution acrylics solventborne acrylic selector) or water in which case they are referred to as emulsions or dispersions and they are also provided in 100% solids bead form. One example is polyhydroxyethylmethacrylate (pHEMA), which makes a crosslinked polymer when treated with

polyisocyanate In organic chemistry, isocyanate is the functional group with the formula . Organic compounds that contain an isocyanate group are referred to as isocyanates. An organic compound with two isocyanate groups is known as a diisocyanate. Diisocyan ...

s. Such materials are a useful component in some paints.

Advantages as an ingredient in paint

Acrylic resin is a common ingredient in

latex paint Acrylic paint is a fast-drying paint made of pigment suspended in acrylic polymer emulsion and plasticizers, silicone oils, defoamers, stabilizers, or metal soaps. Most acrylic paints are water-based, but become water-resistant when dry. Dep ...

(UK: " emulsion paint"). Interior and exterior latex paints with a greater proportion of acrylic resin, versus vinyl, offer better stain protection, greater water resistance, better adhesion, greater resistance to cracking and blistering, and resistance to

alkali In chemistry, an alkali (; from ar, القلوي, al-qaly, lit=ashes of the saltwort) is a basic, ionic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of a ...

cleaners. Acrylic resin is considered extremely weatherproof. This makes it ideal for outdoor applications. In solid form acrylic resin can last for decades. It does not yellow when exposed to sunlight, even after many years. Acrylic resins are the materials which when added to latex (U.K. Emulsion) increases its gloss properties, mechanical properties i.e. scratch resistance, and improves the gloss (shine) compared to vinyl-only resin.

Microbial degradation

Melanin Melanin (; from el, μέλας, melas, black, dark) is a broad term for a group of natural pigments found in most organisms. Eumelanin is produced through a multistage chemical process known as melanogenesis, where the oxidation of the amino ...

-producing ''

Cladosporium ''Cladosporium'' is a genus of fungi including some of the most common indoor and outdoor molds. Species produce olive-green to brown or black colonies, and have dark-pigmented conidia that are formed in simple or branching chains. Many species ...

'' fungi damaged dried acrylic resin samples in the

Milan Cathedral Milan Cathedral ( it, Duomo di Milano ; lmo, Domm de Milan ), or Metropolitan Cathedral-Basilica of the Nativity of Saint Mary ( it, Basilica cattedrale metropolitana di Santa Maria Nascente, links=no), is the cathedral church of Milan, Lombard ...

References

{{Plastics Plastics Acrylate polymers

Advantages as an ingredient in paint

Microbial degradation

See also

References