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Plant-fiber-base polyether ester polylol, and preparation method and applications thereof

A plant fiber based polyether ester technology, applied in the field of polymer chemistry, can solve problems such as poor compatibility, easy shrinkage of polyurethane foam, and reduced reactivity, and achieve high temperature resistance, fine cells, and improved performance.

Inactive Publication Date: 2010-02-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The common disadvantages of the above technologies are: firstly, the obtained plant-based polyol has low functionality, so the reactivity is not high; the liquefied product has poor compatibility with other raw materials for synthesizing polyurethane, and the synthetic polyurethane foam is easy to shrink
Since the fatty acid used is usually a monofunctional group, the esterification reaction often results in the capping of polyether polyols, which reduces the reactivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Liquefaction of plant fiber raw materials: Add polyethylene glycol 400 20g, glycerin 40g and sulfuric acid 0.3g into a three-necked flask equipped with a condenser, a mechanical stirrer and a water separator, stir to make it evenly mixed, and start the oil bath Heat up to 50°C, add 30g of dried bagasse, heat up to 150°C, and react at this temperature for 1h, add 0.9g of solid NaOH to neutralize the acidic substances in the reaction mixture, and filter while hot to remove the filter residue, Cooling to obtain liquefied product;

[0030] (2) Esterification of the liquefied product of plant fiber raw materials: take 50 g of the liquefied product in a three-necked flask, and when the temperature of the liquefied product is stabilized at 140° C., add 50 g of ε-caprolactone and 0.005 g of stannous octoate. After reacting for 1 hour, stop heating and cool at room temperature to obtain a plant fiber-based polyester polyol with a hydroxyl value of 495 mgKOH / g.

Embodiment 2

[0032] (1) Liquefaction of plant fiber raw materials: add polyethylene glycol 400 60g, glycerin 30g and sulfuric acid 1g into a three-necked flask equipped with a condenser, a mechanical stirrer and a water separator, stir to make it evenly mixed, and start oil bath heating , heat up to 60°C, add 30g of dried bagasse, heat up to 130°C, and react at this temperature for 1h, add 0.9g of solid NaOH to neutralize the acidic substances in the reaction mixture, and filter while hot to remove the filter residue, cool , to obtain the liquefied product;

[0033] (2) Esterification of the liquefied product of plant fiber raw materials: take 50 g of the liquefied product in a three-necked flask, and when the temperature of the liquefied product is stabilized at 140° C., add 30 g of γ-valerolactone and 0.15 g of dibutyltin oxide. After reacting for 1 hour, the heating was stopped and cooled at room temperature to obtain a plant fiber-based polyester polyol with a hydroxyl value of 450 mgK...

Embodiment 3

[0035] (1) Liquefaction of plant fiber raw materials: Add polyethylene glycol 400 60g, glycerin 20g and sulfuric acid 3g into a three-necked flask equipped with a condenser, a mechanical stirrer and a water separator, stir to make it evenly mixed, and start oil bath heating , heat up to 60°C, add 30g of dried bagasse, heat up to 170°C, and react at this temperature for 1h, add 0.9g of solid NaOH to neutralize the acidic substances in the reaction mixture, and filter while hot to remove the filter residue, cool , to obtain the liquefied product;

[0036] (2) Esterification of the liquefied product of plant fiber raw material: take 50 g of the liquefied product in a three-necked flask, and when the temperature of the liquefied product is stabilized at 140° C., add 100 g of gamma-valerolactone and 0.1 g of tetraphenyltin. After reacting for 1 hour, the heating was stopped and cooled at room temperature to obtain a plant fiber-based polyester polyol with a hydroxyl value of 450 mg...

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Abstract

The invention discloses a preparation method of a plant-fiber-base polyether ester polylol, which belongs to the field of high polymer chemistry. The preparation method comprises the following steps:liquefying plant fiber materials and a liquefacient under the catalysis of an acid catalyst to obtain a liquefying product; and carrying out the reaction of the liquefying product and cyclic carboxylic ethers, open-chain hydroxyl carboxylic ethers or estolides, and the like under the catalysis of acids, organic tin compounds or titanic acid esters so as to obtain the polyether ester polylol. The method realizes the high functionality and the high reactive activity of the plant-fiber-base polyether ester polylol. The hydroxyl value and the relative molecular mass of the product can be regulatedby changing the material proportions and the technique conditions to obtain the required product so as to prepare the polylol material required by different polyurethane materials and enhance the performance of the polyurethane materials.

Description

technical field [0001] The invention belongs to the field of macromolecular chemistry, in particular to a plant fiber-based polyether ester polyol and its preparation method and application, in particular to a method for preparing polyester polyol for producing polyurethane from plant fiber raw materials . Background technique [0002] Polyurethane is the abbreviation of polyurethane, which is a polymer compound obtained by the interaction of dibasic or polybasic organic isocyanate and polyol compound. According to its physical properties and uses, polyurethane can usually be divided into rigid polyurethane foam, flexible polyurethane foam, polyurethane coating and polyurethane elastomer. Rigid polyurethane foam has very low thermal conductivity and is an excellent thermal insulation and structural material. It is widely used in various fields of national economy and national defense industry such as construction, refrigerators, automobiles, furniture, agriculture, medicine...

Claims

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Application Information

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IPC IPC(8): C08B3/00C08B3/12C08G18/42C08J9/00
Inventor 谌凡更刘娟娟敖日格勒
Owner SOUTH CHINA UNIV OF TECH
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