Method for preparing high-rigidity chlorinated polyethylene
A technology of chlorinated polyethylene and high-density polyethylene, which is applied in the field of producing high-rigidity chlorinated polyethylene by the hydrochloric acid phase method, can solve the problems of product competitiveness decline, product rigidity, and poor weather resistance of MBS, so as to reduce production costs, Improved processability and thorough separation
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Embodiment 1
[0025] a. Preparation of suspension solution: Add 80L of 15% hydrochloric acid solution into a 100L acid-resistant reactor, and add a solution with a melt index MI (190°C / 5kg) = 0.2-1.0g / 10min and an MFR of 10-30 under stirring. 10kg of high-density polyethylene, 0.008kg of dispersant alkylphenol polyoxyethylene ether, and 0.016kg of anti-sticking agent talcum powder were stirred evenly to prepare a suspension solution, and then the acid-resistant reaction kettle was sealed.
[0026] b, chlorination reaction: feed chlorine into the suspension solution in two stages to carry out chlorination reaction:
[0027] Heating section: the initial chlorine flow temperature is controlled at 90°C, and the temperature is gradually raised to 135°C, and the chlorine flow rate in the heating section is 3.1kg;
[0028] Constant temperature section: the temperature in the constant temperature section is controlled at 135°C, the temperature is kept constant, and the chlorine flow rate is 4.5kg; ...
Embodiment 2
[0032] a. Preparation of suspension solution: Add 4000L of 10% hydrochloric acid solution into a 5000L acid-resistant reactor, and add a solution with a melt index MI (190°C / 5kg) = 0.2-1.0g / 10min and an MFR of 10-30 under stirring. 400kg of high-density polyethylene, 1.0kg of dispersant fatty alcohol polyoxyethylene ether, and 2.0kg of anti-sticking agent white carbon black were stirred evenly to obtain a suspension solution, and then the acid-resistant reactor was sealed.
[0033] b, chlorination reaction: feed chlorine into the suspension solution in two stages to carry out chlorination reaction:
[0034] Heating section: the initial chlorine flow temperature is controlled at 75°C, and the temperature is gradually raised to 130°C, and the chlorine flow rate in the heating section is 220kg;
[0035] Constant temperature section: the temperature in the constant temperature section is controlled at 130°C, the temperature is kept constant, and the chlorine flow rate is 220kg;
...
Embodiment 3
[0039] a. Preparation of suspension solution: Add 8700L of 17% hydrochloric acid solution into a 12500L acid-resistant reactor, and add a solution with a melt index MI (190°C / 5kg) = 0.2-1.0g / 10min and an MFR of 10-30 under stirring. 1300kg of high-density polyethylene, 1.6kg of dispersant polyvinylpyrrolidone, and 2kg of anti-sticking agent D17 were stirred evenly to obtain a suspension solution, and then the acid-resistant reactor was sealed.
[0040] b, chlorination reaction: feed chlorine into the suspension solution in two stages to carry out chlorination reaction:
[0041] Heating section: the initial temperature of chlorine flow is controlled at 60°C, and the temperature is gradually raised to 130°C, and the amount of chlorine flow in the heating section is 780kg;
[0042] Constant temperature section: the temperature in the constant temperature section is controlled at 130°C, the temperature is kept constant, and the chlorine flow rate is 520kg;
[0043] During the who...
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