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Preparation method of high molecular polyethylene polyamine polyether used for preparing water-based functional liquids

A technology of ethylene polyamine polyether and polyethylene polyamine, which is applied in the field of improvement of polymer polyethylene polyamine polyether prepared by polymerization reaction, and can solve the problems of increasing polyether molecular weight, increasing polyether viscosity, narrow molecular weight distribution, etc. , to achieve the effects of improved shear resistance and viscosity-temperature performance, product cost saving, and short production cycle

Inactive Publication Date: 2012-10-17
大连广会科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to provide a novel catalyst for synthesizing high-molecular polyethylene polyamine polyether, so as to increase the molecular weight of the polyether, make the molecular weight distribution narrower at the same time, improve the viscosity of the polyether, and solve the problem of thickening of the water-based functional liquid in the prior art, Problems of viscosity temperature, poor shear resistance and short service life

Method used

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  • Preparation method of high molecular polyethylene polyamine polyether used for preparing water-based functional liquids

Examples

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Embodiment 1

[0020] Aggregate in two steps:

[0021] (1) Add 10Kg of polyethylene polyamine into the reaction kettle, heat up to 120°C, vacuum dehydrate for 1 hour, slowly add 120Kg of a mixture of propylene oxide and ethylene oxide dropwise, the weight ratio between the two is: epoxy Propane: ethylene oxide = 1:3.5, control the reaction temperature at 90-100°C, after the dropwise addition, keep the temperature for 1 hour, cool down to 80°C and discharge.

[0022] (2) Polyether 0.8Kg from the previous step, add 50g of catalyst metal hydride, add 7Kg of propylene oxide and ethylene oxide mixture at one time, the ratio is 1:3.5, heat up to 140°C, after the reaction is completed, slowly add ring The mixture of oxypropylene and ethylene oxide is 130Kg, and the reaction temperature is controlled at 90-100°C. After the dropwise addition is completed, the temperature is kept for 1 hour, and the temperature is lowered to discharge.

Embodiment 2

[0024] Take 0.6Kg of polyether in the first step in Example 1, add 50g of catalyst metal hydride, add 7Kg of propylene oxide and ethylene oxide mixture at one time, the ratio is 1:3.5, heat up to 140°C, after the reaction is completed, slowly drop Add 130Kg of a mixture of propylene oxide and ethylene oxide, and control the reaction temperature at 90-100°C. After the dropwise addition, keep the temperature for 1 hour, then cool down and discharge.

Embodiment 3

[0026] Take 0.4Kg of polyether in the first step in Example 1, add 50g of catalyst metal hydride, add 7Kg of propylene oxide and ethylene oxide mixture at one time, the ratio is 1:3.5, heat up to 140°C, after the reaction is completed, slowly drop Add 130Kg of a mixture of propylene oxide and ethylene oxide, and control the reaction temperature at 90-100°C. After the dropwise addition, keep the temperature for 1 hour, then cool down and discharge.

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Abstract

The invention discloses a preparation method of high molecular polyethylene polyamine polyether used for preparing water-based functional liquids. The method adopts polyethylene polyamine and a mixture of propylene oxide and ethylene oxide as raw materials, and employs sodium hydride or potassium hydride as a catalyst to conduct a polymerization reaction so as to obtain the high molecular polyethylene polyamine polyether used for preparing water-based functional liquids. The invention preferably selects a two-step polymerization method as the preparation process. And the prepared high molecular polyether has the characteristics of high molecular weight, narrow distribution and high viscosity, etc., thus being suitable to be used for preparing hydraulic liquids, quenching liquids, and cutting fluids, etc. And the prepared water-based functional liquids have especially outstanding thickening property, viscosity-temperature property and shearing resistance, thus having prolonged service life. The average molecular weight of the high molecular polyether prepared by the method of the invention can reach 30000-35000, 40000-45000, 50000-55000, 60000-65000, 70000-75000, and 80000-90000, the molecular weight distribution coefficient MW / MN is 1.4-1.9, the viscosity range at 100DEG C can be 20000-50000mm<2> / s, and the viscosity-temperature index can be up to 240-260DEG C.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, and more specifically relates to the improvement of preparing high-molecular polyethylene polyamine polyether by polymerization reaction. Background technique [0002] Most of the catalysts used in the existing preparation methods of polymer polyethers are traditional Lewis acids and bases. The polyethers produced by the polymerization reaction often have low molecular weight and wide molecular weight distribution, and at the same time, a large number of low molecular weight oligomers are produced, resulting in high molecular weight. Polyether viscosity is not high. The water-based functional fluid prepared with polymer polyether as the main working medium, such as water-based hydraulic fluid, quenching fluid, cutting fluid, etc., has poor thickening, shear resistance and viscosity-temperature properties, and has a short service life. Contents of the invention [0003] The present...

Claims

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Application Information

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IPC IPC(8): C08G65/28C10M145/34C10M173/00
Inventor 倪雪梅穆健王力军于巧云郑雁宋文贤
Owner 大连广会科技有限公司
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