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Preparation method for polyether polyol with high activity and low volatile matter content

A technology of polyether polyol and low volatile matter, which is applied in the field of preparation of high activity and low volatile matter polyether polyol to achieve the effects of high indentation strength, high compression ratio and high activity

Active Publication Date: 2018-06-12
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Pure polyether polyols have no irritating odor, but most polyether polyols have irritating odors in practical applications. This is mainly due to the inclusion of some by-products or additives during the production process. These substances may belong to volatile organic compounds. So that the polyether polyol has a certain smell in practical application

Method used

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  • Preparation method for polyether polyol with high activity and low volatile matter content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of polyether polyol oligomers

[0040] at 15m 3 Add 2460kg glycerol and 100kg mass concentration of 45% potassium hydroxide aqueous solution in the stainless steel reaction kettle, carry out nitrogen replacement, and measure the oxygen content in the reaction kettle to be lower than 100ppm. The temperature was raised to 80° C., and dehydration was carried out by bubbling nitrogen under reduced pressure. Keep the temperature in the kettle at 90±2°C and the pressure at 0.1±0.02MPa, add 9540kg of propylene oxide continuously, react under internal pressure for 30 minutes, and the reaction temperature at 90±2°C. Then airtightly suck in 700kg 45% potassium hydroxide aqueous solution, heat up to 100±2°C, nitrogen bubbles for dehydration under reduced pressure, the measured moisture content is less than 0.12wt%, and the polyether polyol oligomerization with high catalytic activity can be obtained after cooling down and discharging. thing.

[0041] (2) Prepara...

Embodiment 2

[0060] (1) Preparation of polyether polyol oligomers

[0061] at 15m 3 Add 2050kg trimethylolpropane and 266kg mass concentration of 30% sodium hydroxide and potassium hydroxide mixture into the stainless steel reaction kettle, carry out nitrogen replacement, and measure the oxygen content in the reaction kettle to be lower than 100ppm. The temperature was raised to 105° C., and dehydration was carried out by bubbling nitrogen under reduced pressure. Keep the temperature in the kettle at 100±2°C and the pressure at 0.2±0.02MPa, continuously add 7950kg of propylene oxide, react under internal pressure for 40 minutes, and the reaction temperature at 100±2°C. Then airtightly pump in 1400kg 30% potassium hydroxide aqueous solution, heat up to 100±2°C, nitrogen bubbles for dehydration under reduced pressure, the measured moisture content is less than 0.12wt%, and the polyether polyol oligomerization with high catalytic activity can be obtained after cooling down and discharging. ...

Embodiment 3

[0081] (1) Preparation of polyether polyol oligomers

[0082] at 15m 3 Add the mixture of 1829kg glycerol and propylene glycol in the stainless steel reactor, 180kg mass concentration is the aqueous solution of the mixture of 50% sodium methylate and potassium hydroxide, carry out nitrogen replacement, measure the oxygen content in the reactor and be lower than 100ppm. Raise the temperature to 110±2°C, and carry out dehydration under reduced pressure by nitrogen bubbling. Keep the temperature in the kettle at 110±2°C and the pressure at 0.1±0.02MPa, continuously add 7155kg of propylene oxide, react under internal pressure for 30 minutes, and the reaction temperature at 110±2°C. Then airtightly draw in 900kg 50% potassium hydroxide aqueous solution, raise the temperature to 110±2°C, nitrogen bubbling and dehydration under reduced pressure, the measured moisture content is less than 0.12wt%, cool down and discharge to obtain a polyether polyol oligomer with high catalytic activ...

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Abstract

The invention belongs to the technical field of chemical synthesis, and specifically relates to a preparation method for polyether polyol with high activity and low volatile matter content. The methodcomprises the following steps: (1) synthesizing a polyether polyol oligomer with highly-efficient catalytic activity by adopting a polyol compound as a starting agent and an alkaline metal aqueous solution as a catalyst; (2) with the polyether polyol oligomer with highly-efficient catalytic activity prepared in the step (1) as base polyether, adding epoxypropane for a reaction at a pressure of 0to 0.5 MPa and a temperature of 80 to 150 DEG C, after the epoxypropane is added, carrying out an internal pressure reaction, then adding oxirane for a reaction, and after the oxirane is added, carrying out an internal pressure reaction so as to prepare a crude polyether polyol polymer with high activity; and (3) subjecting the crude polyether polyol polymer with high activity prepared in the step(2) to refining treatment so as to obtain the polyether polyol with high activity and low volatile matter content. The preparation method provided by the invention can significantly shorten the production period of a product; and the product produced by using the preparation method provided by the invention has the characteristics of high activity, low content of volatile organic matters and small odor.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of polyether polyol with high activity and low volatile matter. Background technique [0002] Compared with polyether polyols with secondary hydroxyl ends, polyether polyols with primary hydroxyl ends have more obvious advantages in the preparation of polyurethane products. First of all, from the perspective of the activity of reacting with isocyanate groups, the primary hydroxyl group is significantly higher than the secondary hydroxyl group, which can speed up the reaction speed. Most polyether polyols with secondary hydroxyl groups at the end are prepared by homopolymerization of propylene oxide, but their applications in many aspects are greatly limited, such as polyurethane large high resilience foam, molded foam and other applications. In addition, the application of polyether polyols terminated with secondary hydroxyl groups in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G65/30C08G18/48C08G101/00
CPCC08G18/48C08G65/2609C08G65/30C08G2101/00
Inventor 刘沂倪华方郭辉张奕张涛李晓邵迎秋李宇张莹
Owner SHANDONG BLUSR DONGDA CHEM