Method for preparing oil-filled chlorinated polyethylene rubber by suspension chlorination reaction
A technology of chlorinated polyethylene and chlorination reaction, which is applied in the field of chlorinated polyethylene rubber preparation, can solve the problems of high content of chlorinated paraffin, high content of polyethylene wax, poor heat aging resistance, etc. The effect of high product performance and improved heat aging resistance
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Embodiment 1
[0031] This embodiment provides a method for preparing oil-extended chlorinated polyethylene rubber by suspension chlorination reaction, the steps are as follows:
[0032] (1) Put 140Kg of 17% hydrochloric acid in a 200L glass-lined reactor, start stirring, select metallocene high-density polyethylene powder 40.0Kg, melt index MI (190℃ / 10min, 5Kg) 1, melt flow ratio MFR 9.5, poly Ethylene wax content 0.1%, water content 0.15wt%, particle size 90μm; hydrophobic white carbon black 0.06Kg, organic fluorine non-ionic surfactant 0.5Kg, benzoyl peroxide 0.04Kg, add to the reactor together, well mixed;
[0033] (2) Turn on the stirring, and heat the system to 75°C, pump the negative pressure to -0.08Mpa, feed chlorine gas, control the chlorine flow rate at 0.2-0.3Kg / min, when 25Kg chlorine gas is fed, the temperature of the material rises to 132.5°C , put cooling water into the jacket of the reaction kettle to cool down, and keep the material temperature at 132.5°C. When the total c...
Embodiment 2
[0041] This embodiment provides a method for preparing oil-extended chlorinated polyethylene rubber by suspension chlorination reaction, the steps are as follows:
[0042](1) Add 16000Kg 18% hydrochloric acid into a 25m³ glass-lined reactor, start stirring, select metallocene high-density polyethylene powder 2200Kg, melt index (MI 190°C / 10min, 5Kg) 4, melt flow ratio (MFR) 9.5, Water content 0.2wt%, particle size 150μm; hydrophobic white carbon black 8.8Kg, surfactant 40Kg, benzoyl peroxide 8.8Kg, add to the reactor together, mix well;
[0043] (2) Raise the temperature of the material to 76°C, pump negative pressure to make the pressure of the reactor -0.04Mpa, feed chlorine gas, control the speed of chlorine gas to make the pressure and temperature in the reactor rise slowly, when the mass number of chlorine gas introduced reaches 1330Kg, feed Cooling water was introduced into the jacket of the reaction kettle to transfer the excess heat of reaction, so that the reaction tem...
Embodiment 3
[0052] This embodiment provides a method for preparing oil-extended chlorinated polyethylene rubber by suspension chlorination reaction, the steps are as follows:
[0053] (1) Add 16000Kg 18% hydrochloric acid into a 25m³ glass-lined reactor, start stirring, select metallocene high-density polyethylene powder 2200Kg, melt index (MI 190°C / 10min, 5Kg) 2, melt flow ratio (MFR) 9.5, Water content 0.2wt%, particle size 120μm; hydrophobic white carbon black 8.8Kg, surfactant 40Kg, benzoyl peroxide 8.8Kg, add to the reactor together, mix well;
[0054] (2) Raise the temperature of the material to 76°C, pump negative pressure to make the pressure of the reactor -0.04Mpa, feed chlorine gas, control the speed of chlorine gas to make the pressure and temperature in the reactor rise slowly, when the mass number of chlorine gas introduced reaches 1330Kg, feed Cooling water was introduced into the jacket of the reaction kettle to transfer the excess heat of reaction, so that the reaction te...
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Abstract
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