Method for preparing high chlorinated polypropylene by water phase suspension method

A chlorinated polypropylene, water-phase suspension technology, applied in the field of polymer materials, can solve the problems of low efficiency, unable to achieve normal production, unable to meet a large amount of chlorine, adhesion and cohesion, etc., to achieve strong adhesion and salt resistance. The effect of strong fog and fast drying speed

Pending Publication Date: 2021-10-22
上海宝钱新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for preparing high-chlorinated polypropylene by aqueous phase suspension method, which solves the problem of 1. The chlorinated polypropylene resin produced by the aqueous phase process on the market has too large molecular weight of raw materials and cannot meet the requirements A large amount of chlorine is passed through, which is easy to cause adhesion and unite the kettle, and the low efficiency cannot realize normal production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In a 1.5Mpa enamel reactor with a volume of 6300L, 3500 kg of deionized water, 250 kg of cracked polypropylene wax powder, 9 kg of sodium polymethacrylate, and 4 kg of alkylphenol polyoxyethylene ether are pre-dispersed. Dibenzoyl oxide is 1.8 kg, tert-butyl peroxybenzoate is 0.6 kg, and the temperature reaches 85 ° C. After replacing the air with nitrogen, chlorine flow is started. The speed of chlorine flow is controlled at 10-20 kg / min, and the heating rate is controlled at 2-4. ℃ / 10min, the reaction pressure is controlled to not exceed 0.6Mpa, when the pressure exceeds or the temperature rises too fast, reduce the amount of chlorine flow until it reaches about 120°C, and the total amount of chlorine flow is not less than 520 kg. At this time, the pressure begins to rise to 0.8Mpa , slow down the chlorine flow rate to 2-10kg / min, the temperature rise is unlimited and the pressure is not higher than 0.8Mpa, until the temperature reaches 130°C, the total chlorine flow r...

Embodiment 2

[0023] In a 1.5Mpa enamel reactor with a volume of 6300L, 3500 kg of deionized water, 250 kg of cracked polypropylene wax powder, 9 kg of sodium polymethacrylate, and 4 kg of alkylphenol polyoxyethylene ether are pre-dispersed. 1.8 kg of dibenzoyl oxide, 0.8 kg of tert-butyl peroxybenzoate, the temperature reaches 88 ° C, and after the air is replaced with nitrogen, chlorine flow is started, the speed of chlorine flow is controlled at 10-20 kg / min, and the temperature rise rate is controlled at 2-4 ℃ / 10min, the reaction pressure is controlled to not exceed 0.6Mpa, when the pressure exceeds or the temperature rises too fast, reduce the amount of chlorine flow until it reaches about 120°C, and the total amount of chlorine flow is not less than 560 kg. At this time, the pressure begins to rise to 0.8Mpa , slow down the chlorine flow rate to 2-10kg / min, the temperature rise is not limited and the pressure is not higher than 0.8Mpa, until the temperature reaches 135°C, the total chl...

Embodiment 3

[0025] In a 1.5Mpa enamel reactor with a volume of 6300L, 3500 kg of deionized water, 250 kg of cracked polypropylene wax powder, 9 kg of sodium polymethacrylate, and 4 kg of alkylphenol polyoxyethylene ether are pre-dispersed. 1.8 kg of dibenzoyl oxide, 1.2 kg of tert-butyl peroxybenzoate, when the temperature reaches 88°C, replace the air with nitrogen and start to pass chlorine, the speed of chlorine flow is controlled at 10-20kg / min, and the temperature rise rate is controlled at 2- 4°C / 10min, the reaction pressure is controlled to not exceed 0.6Mpa, when the pressure exceeds or the temperature rises too fast, reduce the amount of chlorine flow until it reaches about 120°C, the total amount of chlorine flow is not less than 560 kg, and the pressure begins to rise to 0.8Mpa Slow down the speed of chlorine flow to 2-10kg / min, the temperature rise is not limited and the pressure is not higher than 0.8Mpa, until the temperature reaches 140°C, the total chlorine flow rate is 720...

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Abstract

The invention provides a method for preparing high chlorinated polypropylene by a water phase suspension method, which comprises the following steps: adding deionized water, cracked polypropylene wax powder, an emulsifier and a dispersant into a reaction kettle for pre-dispersion and suspension, adding an initiator when a preset temperature is reached, starting to heat and introduce chlorine, controlling the chlorine introduction speed and the heating speed, obtaining the large-particle-size loosen chlorinated polypropylene through post-treatment. The high-chlorinated polypropylene obtained by the preparation method disclosed by the invention is better in dissolving property, lower in viscosity, high in adhesive strength and corrosion resistance, higher in drying speed and strong in salt spray resistance, and has a good application prospect.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing high-chlorinated polypropylene by an aqueous phase suspension method. Background technique [0002] Chlorinated polypropylene resin, referred to as CPP, is an important chemically modified polymer material. The appearance is light yellow granular solid, non-toxic and tasteless, with a melting point of about 120°C and stable chemical properties below 150°C. It is swellable in alcohols and aliphatic hydrocarbon solvents (chlorinated polypropylene with less than 35% chlorine content is insoluble), soluble in aromatic hydrocarbons, esters and ketone solvents. High chlorinated polypropylene not only has the good oil resistance, heat resistance, acid resistance, alkali resistance and ultraviolet radiation resistance of ordinary chlorinated polypropylene, but also has low viscosity, high adhesion, solvent solubility and Anti-corrosion performance, can be used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/22C08F110/06C08F4/34C08F2/20
CPCC08F8/22C08F110/06C08F4/34C08F2/20
Inventor 杨太山
Owner 上海宝钱新材料技术有限公司
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