Acrylic acid is the simplest unsaturated carboxylic acid. Its molecular structure is composed of a vinyl group and a carboxyl group. Pure acrylic acid is a colorless clear liquid with characteristic pungent odors. Density 1.0511. The melting point is 14 degrees. The boiling point is 140.9 degrees Celsius. Strong acidity. Corrosive. Soluble in water, ethanol and ethyl ether. The chemical properties are lively. It is easy to polymerize into transparent white powder. Propionic acid was formed during reduction. 2- chlorpropionic acid was generated when added with hydrochloric acid. It is used for the preparation of acrylic resin, and also for other organic synthesis. It is obtained by oxidation of acrolein or hydrolysis of acrylonitrile, or by synthesis of acetylene, carbon monoxide and water, or by pressurized oxidation of ethylene and carbon monoxide.
Acrylic acid can react with carboxylic acid, and the corresponding esters can be obtained by reaction with alcohols. The most common acrylates include methyl acrylate, butyl acrylate, ethyl acrylate and 2-ethylhexyl acrylate.
Acrylic acid and its esters themselves or mixed with other monomers, will occur polymerization reaction to form homopolymer or copolymer. The monomers usually copolymerized with acrylic acid include amides, acrylonitrile, vinyl, styrene and butadiene. This kind of polymer can be used to produce all kinds of plastics, coatings, adhesives, elastomers, floor polishers and coatings.