It is understood that methyl methacrylate-butadiene-styrene copolymer (MBS) is a white powder, odorless and high in strength. It has high rigidity and can maintain sufficient rigidity at 85-90℃. It has good low temperature resistance and still has good toughness at -40℃. It has excellent transparency, with a light transmittance of 80%-90%. It is resistant to oil, weak acid, and weak alkali. Its outstanding advantages are transparency and resistance to UV aging. Soluble in acetone, benzene, toluene, dichloroethane and other organic solvents.
The production process of MBS resin is to first emulsify butadiene and styrene in water and emulsifier, polymerize under the action of initiator to produce styrene-butadiene latex (SBR latex), and then Add styrene and methyl methacrylate for emulsion graft polymerization to obtain MBS resin graft latex (MBS resin latex). Finally, after coagulation, dehydration and drying, the finished MBS resin product is obtained.
In the entire production process of MBS resin, there are three key technologies:
One is the synthesis technology of SBR latex, because the SBR latex The particle size not only determines the impact resistance of MBS resin and PVC alloy, but also determines its light transmittance.
The second is the synthesis technology of MBS resin latex, because the core-shell ratio, joint The branch rate and the order of adding monomers during the grafting process have a very significant impact on the cohesion and post-processing of MBS resin latex, the particle morphology of MBS resin powder, and the compatibility and optical properties of MBS resin and PVC.
The third is the agglomeration technology of MBS resin latex. The level of agglomeration directly determines the particle size distribution, particle regularity, fluidity and apparent density of the final product, as well as the dispersion and phase of MBS resin in PVC. Capacitance and other indicators.
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