Process for preparating medical polyvinyl chioride resin with high polymerization

[0017] Example 1

[0018] 14 kg of vinyl chloride monomer, 0.18 kg of diethylhexyl peroxide dicarbonate, cumene peroxide neodecanoate content of 10-50% water emulsion, 0.02 kg of high alcoholysis polyvinyl alcohol, medium Alcoholysis degree polyvinyl alcohol and low alcoholysis degree polyvinyl alcohol, 0.06 kg of additives and 25.2 kg of water are added to the polymerization kettle. There are 2 baffles in the kettle, the stirring speed is 360 rpm, and the temperature is 39 ℃ After reacting for 10-12 hours, adding 0.03 kg of terminator, an aqueous suspension of medical polyvinyl chloride resin with high degree of polymerization can be obtained, the unreacted vinyl chloride monomer is removed, and the finished product is obtained by centrifugal dehydration and drying.

[0019] Example 2

[0020] Combine 14 kilograms of vinyl chloride monomer, 0.30 kilograms of water emulsion with 10-50% diethylhexyl peroxydicarbonate content, 0.018 kilograms of high alcoholysis polyvinyl alcohol and medium alcoholysis polyvinyl alcohol, and 0.06 kilograms of additives Add 25.2 kilograms of water to the polymerization kettle, set 2 baffles in the kettle, stir at 360 rpm, react for 12 to 14 hours at a temperature of 35°C, add 0.03 kg of terminator to obtain medical high polymerization The aqueous suspension of polyvinyl chloride resin is removed from the unreacted vinyl chloride monomer, centrifuged and dried to obtain the finished product.

[0021] Example 3

[0022] 14 kg of vinyl chloride monomer, 0.18 kg of diethylhexyl peroxide dicarbonate, cumene peroxide neodecanoate, and tert-butyl peroxide neodecanoate containing 10-50% aqueous emulsion, 0.02 kg High alcoholysis degree polyvinyl alcohol and low alcoholysis degree polyvinyl alcohol, 0.06 kg of additives and 25.2 kg of water are added to the polymerization kettle. There are 2 baffles in the kettle. The stirring speed is 360 rpm and the temperature is 42°C. After reacting for 8-10 hours, adding 0.03 kg of terminator, an aqueous suspension of medical high-polymerization polyvinyl chloride resin can be obtained, the unreacted vinyl chloride monomer is removed, and the finished product is obtained by centrifugal dehydration and drying.