Emulsion polymerization!
It is formed by the reaction and polymerization of monomers, initiators and their reaction solvents. Generally, the resulting resin is a resin solution with a solid content of 50%! It is a resin containing about 50% of the solvent. The general reaction is benzene (toluene or xylene), esters (ethyl acetate, butyl acetate), usually single or mixed!
Solid emulsion type acrylic resin has the immutability of solvent! Generally, the performance of the product will be different due to the choice of solvent! Usually have a certain color number! The glass transition temperature is lower because it is generally reacted with acrylate without methyl! This type of resin can have a higher solid content, up to 80%! It can be used as a high-solid coating, and the production is easy!
However, due to the immutability of solvents, transportation is inconvenient!
Suspension polymerization! It is a relatively complex production process, generally used as a method for the production of solid resin! Solid acrylic resin, which generally uses methyl acrylate to go down and polymerize! Acrylates without methyl generally have certain functional groups! Its polymerization reaction in the reaction tank is not easy to control, and it is easy to become sticky and explode! The general process is to put monomers, initiators, and additives into the reaction axe and then put them into distilled water to react! After a certain time and temperature reaction, wash with water, and then dry! Filter and more! The production control of its products is more strict! If any link in the middle is not in place, the products produced will have a certain impact! It is generally reflected in the difference in color and molecular weight!
Ontology aggregation! It is a high-efficiency production process! Generally, the raw materials are put into a special plastic film! Then it reacts into agglomerates, takes it out and pulverizes it, and then filters it. Generally, the purity of solid acrylic resin produced by this method is the highest among all production methods! His product stability is also the best, but his shortcomings are also full of big! Acrylic resin polymerized with benzene is not soluble in solvents! Sometimes the same monomer with the same ratio is difficult to dissolve several times by suspension polymerization! And the dispersibility of the pigment is not as good as that of the suspension polymerized acrylic resin!
Other aggregation methods! Solvent method reaction, the solvent goes down together to do the intermediary substance during the reaction! After the reactor is finished, remove the solvent!