One-step method for producing chlorinated polyethylene
A technology of chlorinated polyethylene and high-density polyethylene, which is applied in the field of one-step production of chlorinated polyethylene and its preparation, can solve the problems of producing chlorinated polyethylene without a one-step process, and reduce production costs and save water resources , good economic benefits
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Embodiment 1
[0024] Dissolve 2.0g of sodium dodecylbenzenesulfonate, 8.0g of OP-10, 10.0g of polyolefin pyrrolidone (k-30), and 70.0g of active silica in 1000g of water, put them into the reactor, and add 1.0 g benzoyl peroxide, 100.0g high-density polyethylene, close the reactor, raise the temperature to 80°C, and start to feed chlorine gas. 2.5 hours, then keep warm at 135°C for 1 hour. Calcium oxide is added in batches during the reaction process, the calcium oxide is added at a rate such that the pH value of the reaction system is controlled between 7.0 and 8.5, and the total amount of calcium oxide added is 40 g.
[0025] When the kettle temperature drops to 80°C, the reaction system is purged with compressed air, the materials in the kettle are centrifuged, and the solid chlorinated polyethylene is dried to obtain a CPE product with a chlorine content of 35.5%; the centrifuged mother liquor is concentrated and dried to obtain dihydrate with a content of 70.1%. Calcium chloride 105.0...
Embodiment 2
[0027] Dissolve 0.3g of sodium dodecylbenzenesulfonate, 0.7g of OP-10, and 5.0g of polyolefin pyrrolidone (k-30) in 1000g of water, put them into the reactor, and add 5.0g of benzoyl peroxide, 200.0g high-density polyethylene airtight reactor, heat up to 80°C, start to feed chlorine gas, when the temperature rises to 135°C, feed 210.0g of chlorine gas in total, stop chlorine flow, chlorine flow time is 2.5 hours, keep warm at 135°C for 1 Hour. Calcium oxide was added in batches during the reaction, the rate of calcium oxide addition was such that the pH value of the reaction system was controlled between 7.0 and 8.5, and the total amount of calcium oxide added was 81 g.
[0028] When the temperature of the kettle drops to 80°C, the reaction system is purged with compressed air, the materials in the kettle are centrifuged, and the solid chlorinated polyethylene is dried to obtain a CPE product with a chlorine content of 36.0%; the centrifuged mother liquor is concentrated and d...
Embodiment 3
[0030] Dissolve 2.0g of sodium dodecylbenzenesulfonate, 8.0g of OP-10, 10.0g of polyolefin pyrrolidone (k-30), and 70.0g of active silica in 1000g of water, put them into the reactor, and add 1.0 g azobisisobutyronitrile, 100.0g high-density polyethylene, seal the reactor, raise the temperature to 80°C, and start to feed chlorine gas. The time is 2.5 hours, and the temperature is kept at 135° C. for 1 hour. Calcium oxide is added in batches during the reaction process, the calcium oxide is added at a rate such that the pH value of the reaction system is controlled between 7.0 and 8.5, and the total amount of calcium oxide added is 40 g.
[0031] When the kettle temperature drops to 80°C, the reaction system is purged with compressed air, the materials in the kettle are centrifuged, and the solid chlorinated polyethylene is dried to obtain a finished product with a chlorine content of 35.8% CPE; the centrifuged mother liquor is concentrated and dried to obtain a dihydrate with ...
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