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A kind of preparation method of starch-based polyether polyol

A polyether polyol, starch-based technology, applied in the field of preparation of starch-based polyether polyol, achieves the effects of simple equipment and operation, high liquefaction rate, and good biodegradability

Inactive Publication Date: 2019-12-13
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Comprehensively, the existing polyol preparation technology requires the use of catalysts for the reaction, but there are catalyst disposal problems in the liquefaction process using liquid mineral acids such as sulfuric acid as catalysts, and catalyst separation and reuse problems in the liquefaction process using solid acids as catalysts. Therefore, there is an urgent need to develop a catalyst-free starch liquefaction technology to prepare polyols

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 5.0 g of cornstarch to the hydrothermal kettle, then add a mixed polyol solution of 21.0 g polyethylene glycol 200 and 9 g glycerol, then put the hydrothermal kettle into an oven, and react at 140° C. for 5 hours, The reaction kettle was taken out, and after cooling down, the product was distilled to remove water under reduced pressure, and the polyether polyol was obtained by filtration. The liquefaction rate was determined to be 87.2%, and the hydroxyl value was 392.70 mgKOH / g.

Embodiment 2

[0029] Add 5.0g of tapioca starch to the reactor, then add 24.5g of polyethylene glycol 200 and 10.5g of glycerol mixed polyol solution, put the reactor into an oven, react at 140°C for 5 hours, take out the reaction After cooling down, the product was distilled to remove water under reduced pressure, and filtered to obtain a polyether polyol with a liquefaction rate of 90.4% and a hydroxyl value of 331.0 mgKOH / g.

Embodiment 3

[0031] Add 5g of potato starch to the reactor, then add a mixture of 10.5g of polyethylene glycol 200 and 4.5g of glycerin, put the reactor in an oven, react at 180°C for 5 hours, take out the reactor, and cool down The product was distilled to remove water under reduced pressure, filtered to obtain polyether polyol, the liquefaction rate was determined to be 84.7%, and the hydroxyl value was 426.36 mgKOH / g.

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Abstract

The invention provides a preparation method for starch-based polyether polyol, belonging to the technical fields of chemical novel materials and high-quality utilization of biomass. According to the invention, starch and a mixed solution of polyethylene glycol 200 and glycerin are used as raw materials, and a reaction is carried out under a hydro-thermal condition so as to prepare polyether polyol; and the prepared polyether polyol has a hydroxyl value of 274.89 to 426.36 mg KOH / g, and the liquefaction ratio of starch is as high as 90.4% (wherein when the hydroxyl value is 331.0 mg KOH / g, viscosity is 430.5 mPa.s). The preparation method provided by the invention uses biomass as a reaction raw material, and biomass is safe, environment-friendly and good in biodegradability and avoids usage of catalysts used in traditional preparation methods; equipment used in the method and operation carried out in the method are simple; and the prepared starch-based polyether polyol can be used for preparation of hard polyurethane heat-insulation materials.

Description

technical field [0001] The invention relates to the technical field of new chemical materials and high-quality utilization of biomass, in particular to a preparation method of starch-based polyether polyol. Background technique [0002] Polyurethane (PU) is one of the fastest-growing varieties in the modern plastics industry, and its basic reaction is the polycondensation of isocyanate and polyol. In recent years, due to the increasing shortage of petroleum raw materials and the increasingly serious problem of white pollution, the development of the polyurethane industry is being seriously troubled. The use of abundant and biodegradable biomass as a raw material for the production of polyurethane has attracted worldwide attention. Corn starch not only has all the characteristics of renewable resources that other biomass raw materials have, but also has relatively simple components and a large number of hydroxyl groups in its molecular chain, which is suitable for the produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C08G18/48
CPCC08G18/4895C08G65/2609C08G2230/00
Inventor 张龙姜男崔瑛娜
Owner CHANGCHUN UNIV OF TECH
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