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Chlorinated polyethylene produced by one-step method and preparation method of chlorinated polyethylene

A technology of chlorinated polyethylene and high-density polyethylene, which is applied in the field of polymer compound preparation, can solve the problems of unusable sewage acid water, large production equipment area, and high equipment investment cost, achieving remarkable social and environmental benefits, The effect of reducing floor space and reducing equipment investment

Inactive Publication Date: 2015-10-21
SHANDONG LEJIANG BUILDING NEW MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention provides one-step method for producing chlorinated polyethylene and its preparation method, to solve the existing problems of complex technological process, large production equipment footprint, high equipment investment cost, and unusable sewage acid water. , serious waste of water resources and environmental pollution

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  • Chlorinated polyethylene produced by one-step method and preparation method of chlorinated polyethylene

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Embodiment

[0025] as attached figure 1 shown

[0026] One-step production of chlorinated polyethylene and preparation method thereof comprises the following steps:

[0027] S101: Dissolve high-density polyethylene in water, and chlorination reaction occurs under the conditions of emulsifier, dispersant, initiator and chlorine gas;

[0028] S102: adding calcium oxide into the reaction system of S101 in batches to generate chlorinated polyethylene resin and calcium chloride aqueous solution;

[0029] S103: Centrifuge and dry the chlorinated polyethylene resin in S102 to obtain the product chlorinated polyethylene;

[0030] S104: concentrating and drying the calcium chloride aqueous solution in S102 to obtain calcium chloride as a by-product.

[0031] Further, in S101, 15-25 mass parts of high-density polyethylene is added to 90-100 mass parts of water.

[0032] Further, in S101, the emulsifier is an anionic emulsifier or a nonionic emulsifier, and the amount added is 1-12‰ of the mass ...

Embodiment 1

[0042] Dissolve 4.0g of sodium dodecylbenzenesulfonate, 16.0g of OP-10, 20.0g of polyolefin pyrrolidone (k-30), and 140.0g of active silicon dioxide in 2000 g of water, put them into the reactor, and add 2.0g of Benzoyl peroxide, 200.0g of high-density polyethylene, closed reactor, heated up to 80°C, began to feed chlorine gas, when the temperature rose to 135°C, fed 220.0g of chlorine gas in total, stopped the chlorine flow, and the chlorine flow time was 2.5 hour, and then reacted at 135°C for 1 hour. Calcium oxide is added in batches during the reaction, the calcium oxide is added at a rate such that the pH value of the reaction system is controlled between 7.0-8.0, and the total amount of calcium oxide added is 80 g. 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...

Embodiment 2

[0044] Dissolve 0.6g of sodium dodecylbenzenesulfonate, 1.4g of OP-10, and 10.0g of polyolefin pyrrolidone (k-30) in 2000g of water, put them into the reactor, and add 10.0g of benzoyl peroxide, 400.0g high-density polyethylene airtight reactor, heat up to 80°C, start to feed chlorine gas, when the temperature rises to 135°C, cumulatively feed 210.0g chlorine gas, stop chlorine flow, chlorine flow time is 2.5 hours, keep warm at 135°C for 1 Hour. Calcium oxide is added in batches during the reaction, the rate of addition of calcium oxide is as the criterion so that the pH value of the reaction system is controlled between 7.0-8.0, and the total amount of calcium oxide added is 160g. 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 a...

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Abstract

The invention provides chlorinated polyethylene produced by a one-step method and a preparation method of chlorinated polyethylene. The preparation method comprises the following steps: S1, dissolving high density polyethylene in water and carrying out chlorination reaction under a condition of an emulsifier, a dispersant, an initiator and chlorine; S2, adding calcium oxide into a reaction system in the S1 in batches to generate chlorinated polyethylene resin and a calcium chloride aqueous solution; S3, centrifugalizing and drying the chlorinated polyethylene in the S2 to obtain a product chlorinated polyethylene; and S4, concentrating and drying the calcium chloride aqueous solution in the S2 to prepare a byproduct calcium chloride. Compared to a conventional process, the process flow is reduced, the occupied area and the equipment investment are reduced, and the production cost is lowered; moreover, 15 tons of water per ton of CPE can be saved and 25 tons of industrial wastewater per ton of CPE can be reduced, the water resource is saved, and the social environmental benefit is remarkable. Waste acidic water is fully utilized to prepare the byproduct. The preparation method is high in clean production level and has a relatively good economical benefit.

Description

technical field [0001] The invention belongs to the technical field of polymer compound preparation, and in particular relates to one-step production of chlorinated polyethylene and a preparation method thereof. Background technique [0002] Chlorinated polyethylene is a new type of polymer elastomer material with good chemical stability and a series of excellent characteristics, such as: weather resistance, oil resistance, aging resistance, chemical resistance, etc. Because the chain of chlorinated polyethylene contains halogen atoms, it also has good flame retardant properties; and because chlorinated polyethylene is obtained by chlorinating polyethylene, the molecule contains unchlorinated polyethylene segments, and the entire The material exhibits properties between rubber and plastic, and can be widely used as an excellent modifier and additive for plastic and rubber, as well as special rubber products. [0003] There are many kinds of preparation techniques for chlori...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F8/04
Inventor 王波
Owner SHANDONG LEJIANG BUILDING NEW MATERIALS CO LTD
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