(1) jetting a monomeric liquid through an orifice under vibration into a first vertical reactor charged with aqueous medium to make monomeric droplets dispersed in aqueous medium, the specific gravity of the monomeric droplets being smaller than that of the aqueous medium,
The invention of this application relates to the continuous polymerization of vinyl compounds and particularly to the continuous production of discrete, unagglomerated beads or pearls of polymers of such compounds.
PolyvinylChloride, Vapor Phase Bulk Polymerization
These methods are usually employed for low molecular weight functional group reactions, where the stoichiometric proportions of the reactions are fixed for the desired final products. During processing, solvent addition may or may not be important. These reactants are usually mixed in a batch reactor with controlled temperature and addition of catalysts. Vacuum processing or Azeotropic Distillation may be employed to remove condensation products such as H2O to obtain a higher degree of polymerization.
Feb. 26, 1952 w. K. WILSON CONTINUOUS EMULSION POLYMERIZATION PROCESS FOR VINYL ACETATE Filed Nov. 22. 1948 INVENTOR. WILFRED K.WILSON A 7K %-ww-w- Patented Feb. 26, 1952 CONTINUOUS EMULSION POLYMERIZATION PROCESS FOR VINYL ACETATE Wilfred K. Wilson, Springfield, Mass., assignor to Shawinigan Resins Corporation, Springfield, Mass., a corporation of Massachusetts Application November 22, 1943, serial No. 61,317
The present invention relates to a process of continuous suspension polymerization. More specifically, it relates to a process of continuous suspension polymerization for producing polymer particles having uniform size and a narrow distribution of particle sizes.
Although this method is very similar to suspension polymerization, the two schemes differ in two important aspects; the polymerization initiator is located in the aqueous phase and the particles of polymer produced are typically in the order of 0.1 micron in diameter, some ten times smaller than the smallest encountered in suspension polymerization.
Water-soluble ionic liquids as novel stabilizers in suspension polymerization reactions: engineering polymer beads.
Condenser o 1 m3 (400 kgJhr. VC 1 reflux) Time at which stirring was stopped I 8 hours after the start of polymerization. Time at which the polymerization inhibitor was added- 3 minutes after the stoppage of stirring.–
Choosing the Right Agitation for a Polymer Synthesis
Polymerization as a chemical transformation is often required when developing new cGMP polymers for drug delivery systems or medical devices. More than any other process parameter, agitation can often have the greatest influence on the quality of the final product. Here at PCI Synthesis, we have fine-tuned our approach and understand the specific factors that can influence outcomes when utilizing polymer chemistry as shown below.