Blister machine to produce sheet polyvinyl chloride bulk polymerization method

The polymerization device is special, mainly composed of a vertical prepolymerization kettle and a horizontal polymerization kettle with a frame agitator. The polymerization is carried out in two stages. The monomer and initiator are prepolymerized in the prepolymerization kettle for 1 hour to generate seed particles. At this time, the conversion rate reaches 8% to 10%, and then flows into the second stage polymerization kettle, and the same amount of monomer as the prepolymer is added. , continue to aggregate. When the conversion rate reaches 85% to 90%, the residual monomer is discharged, and then the finished product is obtained by crushing and sieving. The particle size and shape of the resin are controlled by the stirring speed, and the reaction heat is brought out by the reflux condensation of the monomer. The production process of this method is simple, the product quality is good, and the production cost is also low.