Preparation method of chlorinated polyethylene rubber with high insulation
A chlorinated polyethylene, high insulation technology, applied in the field of structural improvement, can solve problems such as poor insulation performance, achieve stable product performance and avoid damage
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Embodiment 1
[0020] Example 1: A method for preparing high-insulation chlorinated polyethylene rubber of this example, the steps are:
[0021] a. Add 4,500 kg of water, 11 kg of dispersant, 0.5 kg of emulsifier, and 1.1 kg of peroxide initiator to a 6300 liter reactor, and add 540 kg of powdered high-density polyethylene under stirring until the powder is basically suspended in water;
[0022] b. Heat to make the material temperature reach 65℃, seal the reactor and introduce chlorine gas to react, the total chlorine flow is 585kg; the reaction temperature is 65-130℃, the pressure in the reactor is ≤0.6MPa, and the reaction time is 3.5 hours; after the reaction is over Cool down to remove the excess chlorine in the upper part of the reactor;
[0023] c. Transfer the material to a closed stirring container, wash it repeatedly with water, and add sodium hydroxide to make the pH of the medium between 10-12 and the temperature 70-85℃. After 3 hours, add water to wash off excess sodium hydroxide, and...
Embodiment 2
[0024] Embodiment 2: The preparation method of a highly insulating chlorinated polyethylene rubber of this example, the steps are:
[0025] a. Add 20000 kg of water, 30 kg of dispersant, 2.0 kg of emulsifier, and 5 kg of peroxide initiator to a 25000 liter reactor, and add 2200 kg of powdered high-density polyethylene under stirring until the powder is basically suspended in water;
[0026] b. Heat to make the material temperature reach 70°C, seal the reactor and introduce chlorine gas to react, the total chlorine flow is 2400kg; the reaction temperature is 70-130°C, the pressure in the reactor is ≤0.5MPa, the reaction time is 4 hours; after the reaction is over Cool down to remove the excess chlorine in the upper part of the reactor;
[0027] c. Transfer the material to a closed stirring container, wash it repeatedly with water, and add sodium hydroxide to make the pH of the medium between 10-11 and temperature 70-85℃. After 4 hours, add water to wash off excess sodium hydroxide, ...
Embodiment 3
[0028] Embodiment 3: The preparation method of a high-insulation chlorinated polyethylene rubber of this example, the steps are:
[0029] a. Add 1000kg of water, 1.8kg of dispersant, 0.02kg of emulsifier, and 0.2kg of peroxide initiator to a 1500 liter reactor, and add 100kg of powdered high-density polyethylene under stirring until the powder is basically suspended in water;
[0030] b. Heat to make the material temperature reach 70℃, seal the reactor and introduce chlorine gas to react, the total chlorine flow is 110kg; the reaction temperature is 70-130℃, the pressure in the reactor is ≤0.5MPa, the reaction time is 3 hours; after the reaction is over Cool down to remove the excess chlorine in the upper part of the reactor;
[0031] c. Transfer the material to a closed stirring container, wash it repeatedly with water, and add sodium hydroxide to make the pH of the medium between 10-11 and temperature 70-85℃. After 2.5 hours, add water to wash off excess sodium hydroxide, and the...
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