Acrylic acid and methyl acrylate monomer is a very important kind of emulsion polymerization, emulsion polymers and copolymers due to its excellent mechanical performance, film-forming property, weather resistance, aging resistance, transparency, adhesion strength, water resistance, oil resistance, anti fouling resistance. And the raw material cost is moderate, so acrylic acid and methyl acrylic polymer and copolymer emulsion in coating, adhesive, paper processing, textile, printing and dyeing, leather, collodion, ink, elastomer, water treatment, impact modifier, medical polymer, nano materials and many other technology has been widely used in the field of and become a kind of rapid development.
Acrylic acid and methyl acrylate monomers at home and abroad have developed rapidly, the known monomer have thousands, which is of great industrial value are ten, has been put into mass production of acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, acrylic acid -2- ethyl acrylate, methyl methacrylate, butyl acrylate. Its output is increasing year by year.
Acrylic and methacrylic monomers are usually colorless and transparent liquid, with a pungent odor and flammable.
Acrylic esters will self assemble during storage and transportation, especially when mixed with moisture and iron impurities, or at higher temperatures, so it is required to store at temperatures below 25 degrees and add inhibitors. The commonly used inhibitor of two hydroxy aniline, 2, 5 Di tert butyl phenol and hydroquinone monomethyl ether, its content is generally 10~30mg/kg. The inhibitor will affect the subsequent polymerization, before using the available alkali washing and distillation or ion exchange method to remove the inhibitor.
Acrylate, especially low grade ester, is easy to form end polymer when stored at high temperature. End polymer appearance is white popcorn, a porous material insoluble, micro it is due to the presence in the monomer initiator, the trace in the a position on the occurrence of hydrogen ester crosslinking reaction product of a three-dimensional structure generated by the. If stored under 25 centigrade, and try to reduce the water content as much as possible and add the inhibitor, the formation of end polymer can be avoided or reduced.
Acrylic acid and methyl acrylic acid monomer, acrylic acid ester is especially low, have a certain toxicity, is irritating to the eyes, skin and mucous membrane, should be controlled in the environment in the air vapor concentration is less than or equal to 75mg/kg, should keep the workshop ventilation.