Preparation method of polyether carbonate polyalcohol

A polyether carbonate and polyol technology, applied in chemical instruments and methods, transportation and packaging, dissolution, etc., can solve problems such as difficult to reuse, expensive catalysts, etc., to achieve easy separation, reduce limitations, and reusability Good results

Inactive Publication Date: 2012-07-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The more important thing about these patents is that the catalyst is expensive and difficult to reuse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put 184g of glycerin in a reaction kettle equipped with a mechanical stirrer, add a sodium alkoxide catalyst with a total mass of 5‰ of raw materials under stirring, heat the material to 100°C, and vacuum dehydrate (about 1h), until no water is distilled out , close the vacuum valve, make the pressure in the kettle close to -0.09~-0.08Mpa, the temperature rises slowly to 140°C, and 270g of dimethyl carbonate (DMC) is added within 30min, and the experimental reaction is completed after 4h of heating, cooling, and discharging , Measurement. After testing and analysis, the polyether carbonate polyol has a carbonate group content of 50.75g%, a number average molecular weight of 1320g / mol, a hydroxyl value of 466mgKOH / g, and a viscosity of 65951mPa·s (25°C).

Embodiment 2

[0028] Put 200g of glycerin in a reaction kettle equipped with a mechanical stirrer, add a sodium alkoxide catalyst of 1% of the total mass of raw materials under stirring, heat the material to 100°C, and vacuum dehydrate (about 1h), until no water is distilled out , close the vacuum valve, make the pressure in the kettle close to -0.08~-0.09Mpa, the temperature rises slowly to 140°C, and add 235g of dimethyl carbonate (DMC) within 30min, the experimental reaction is completed after 4h of heating, cooling and discharging , Measurement. After testing and analysis, the polyether carbonate polyol has a carbonate group content of 43.25g%, a number average molecular weight of 1130g / mol, a hydroxyl value of 557mgKOH / g, and a viscosity of 61782mPa·s (25°C).

Embodiment 3

[0030] Put 184g of glycerin in a reaction kettle equipped with a mechanical stirrer, add a potassium salt catalyst with a total mass of 8‰ of the raw material under stirring, heat the material to 100°C-110°C, and vacuum dehydrate (about 1h) until there is no water When distilling off, close the vacuum valve to make the pressure in the kettle close to -0.09~-0.08MPa, and slowly raise the temperature to 140°C, and add 270g of dimethyl carbonate (DMC) within 30min, and finish heating and cooling after 4h for the experimental reaction. , discharging, measuring. After testing and analysis, the polyether carbonate polyol has a carbonate group content of 51.50g%, a number average molecular weight of 1225g / mol, a hydroxyl value of 495mgKOH / g, and a viscosity of 63971mPa·s (25°C).

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Abstract

The invention discloses a preparation method of sucrose type polyether carbonate polyalcohol, which comprises the following steps: carrying out ester exchange reaction on glycerol and dimethyl carbonate (DMC) under the action of a catalyst to obtain polyether carbonate polyalcohol until reaching a certain molecular weight; and reacting the polyether carbonate polyalcohol and epoxyethane (EO)\propylene oxide (PO) according to needs. The molecular weight and hydroxyl value of the polyether carbonate polyalcohol are controlled by the quantity of the epoxy compounds, and the viscosity of the polyether can be lowered to some extent. The invention has the characteristics of economy, high safety, environmental protection, low price and high efficiency, and is applicable to the technical field of chemical industry.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for synthesizing 320-PEC polyol macromolecule material, especially a polyurethane and surfactant material with good degradation performance; the invention also relates to a larger molecular weight polyether material method of preparation. Background technique [0002] In the downstream products of petrochemical industry, non-ionic surfactants and polyether polyol products used in polyurethane production generally belong to polyether and polyether with propylene oxide (PO) or ethylene oxide (EO) as the main raw material. Polyether polyol series. However, the price of ethylene oxide / propane is greatly affected by the fluctuation of crude oil price, and it is flammable and explosive, and the safety requirements for production and transportation are very high. With the maturity of methods for producing dimethyl carbonate (DMC) such as urea, the output...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/30C08G65/28C08G18/48B01F17/42B01F17/52C09K23/42C09K23/52
Inventor 周建成周晓锋岳振涛李乃旭王云
Owner SOUTHEAST UNIV
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