Production method of polyvinyl chloride with small pot suspension method
A technology of polyvinyl chloride and a production method, which is applied in the field of small-scale kettle suspension method PVC production, can solve the problems of unstable small-scale kettle heat transfer ability, low degree of automation, incomplete recovery, etc., so as to shorten the polymerization reaction time and improve the Product quality, the effect of reducing the cleaning time
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[0011] A small kettle suspension polyvinyl chloride, characterized in that: the optimized formula is: initiator, dispersant, and other auxiliary agents, the initiator is peroxydicarbonate-diethylhexyl; the dispersant uses different Alcoholysis degree binary PVA (polyvinyl alcohol) composite system and HPMC (hydroxypropyl methylcellulose) + PVA multiple composite system; other auxiliary agents include: transfer agent such as mercaptoethanol; terminator adopts acetone thiosemicarbazone ( ATSC) and the composite system of the two.
[0012] A production method of polyvinyl chloride by the suspension method in a small kettle according to claim 1, characterized in that: through secondary water injection, that is, after the above-mentioned reaction reaches a certain level, inject desalted water again to avoid volume shrinkage, specifically as follows Steps to proceed:
[0013] (1) Continuously add water according to the polymerization reaction rate;
[0014] (2) Add a certain amoun...
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