| 摘要 |
Production method of polyvinyl chloride in an agitated reactor under pressure, by means of polymerization of vinyl monomers in aqueous suspension, of the type in which at least vinyl monomer in aqueous solution is introduced into a reactor under agitation, characterised in that it uses the following combination of characteristics: a)-add a stabilizing-suspending agent in hydroalcoholic suspension of an inorganic mineral powder containing at least magnesium and hydroxyl groups, b)-provide the addition in said reactor of: b1) a base; b2) a peroxide compound represented by A2O2 where A = H or Na b3) a chloroformate represented by CICOOR1 b4) an organic acid anhydride represented by the general formula: (RCO)2O where R is an alkyl radical comprised between C=1 and C=20 c)-in order to carry out the formation of the reaction catalyst in situ by means of the separate addition of b1), b2), b3), b4), only and exclusively in said reactor in order to create said catalyst progressively and under the control of the addition of said stabilizing-suspending agent a).
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