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Vegetable oil polyol and preparation method thereof

A vegetable oil polyol and vegetable oil technology, applied in the fields of vegetable oil polyol and its preparation, pure bio-based vegetable oil polyol and its preparation, can solve the problems of polyester polyol price fluctuations, poor degradation of polyurethane materials, environmental hazards, etc. , to achieve the effects of low cost, simple preparation process and good biodegradability

Inactive Publication Date: 2011-10-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, as a non-renewable fossil resource, the reserves of petroleum are rapidly decreasing, and the constant changes in petroleum prices lead to great fluctuations in the price of corresponding polyether polyols or polyester polyols; in addition, the production of polyols with petroleum as raw materials The process pollutes the environment more seriously, and the degradability of the polyurethane material obtained from petroleum-based polyether is poor, and its use also brings harm to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, the preparation of vegetable oil polyol

[0022] (1) After mixing 160 grams of rapeseed oil with 24 grams of formic acid, heat up to 50° C., dropwise add 160 grams of hydrogen peroxide (wherein, formic acid accounts for 13.2% by mass of rapeseed oil, and hydrogen peroxide accounts for 13.2% of the mass of rapeseed oil. The percentage content is 30%). After reacting for 1 hour, the temperature was raised to 60° C. for 5 hours. Stand for stratification, separate the organic layer, wash with deionized water until neutral, and remove the residual moisture under reduced pressure to obtain 165 grams of epoxidized rapeseed oil with an epoxy value of 5.40%.

[0023] (2) Dissolve 25 grams of sorbitol in 5 grams of water at 60°C, add 1.56 grams of tetrafluoroboric acid and 100 grams of epoxidized rapeseed oil obtained in step (1) (wherein, sorbitol, tetrafluoroboric acid, cyclic The mass fraction ratio of oxidized rapeseed oil and water is 4.5:1:18:0.9), keeping th...

Embodiment 2

[0024] Embodiment 2, the preparation of vegetable oil polyol

[0025] (1) The preparation method of epoxidized rapeseed oil is the same as that of Example 1.

[0026] (2) Dissolve 60 grams of sorbitol in 10 grams of water at 70°C, add 2.25 grams of tetrafluoroboric acid and 100 grams of epoxidized rapeseed oil obtained in step (1) (wherein, sorbitol, tetrafluoroboric acid, cyclic The mass fraction ratio of oxidized rapeseed oil and water is 6:0.1:10:1), keeping the temperature at 70°C, reacting for 5 hours, washing with water to remove unreacted sorbitol, and distilling under reduced pressure to remove residual moisture to obtain rapeseed Oil-based polyol with a hydroxyl value of 204 mg KOH / g.

Embodiment 3

[0027] Embodiment 3, the preparation of vegetable oil polyol

[0028] (1) After mixing 200 grams of rapeseed oil with 20 grams of formic acid, heat up to 60° C., dropwise add 300 grams of hydrogen peroxide (wherein, formic acid accounts for 8.8% of the mass percentage of rapeseed oil, and hydrogen peroxide accounts for the mass percentage of rapeseed oil The percentage content is 45%). After reacting for 2 hours, the temperature was raised to 70° C. for 5 hours. Stand for stratification, separate the organic layer, wash with deionized water until neutral, and remove the residual moisture under reduced pressure to obtain 210 g of epoxidized rapeseed oil with an epoxy value of 6.0%.

[0029] (2) Dissolve 80 grams of sorbitol in 8 grams of water at 80°C, add 4.5 grams of tetrafluoroboric acid and 100 grams of epoxidized rapeseed oil obtained in step (1) (wherein, sorbitol, tetrafluoroboric acid, cyclic The mass fraction ratio of oxidized rapeseed oil and water is 8:0.18:10:0.8),...

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Abstract

The invention discloses vegetable oil polyol and a preparation method thereof. The preparation method comprises the following steps that: 1) vegetable oil is subjected to an epoxidation reaction under the action of an oxidizing agent so as to obtain epoxidized vegetable oil; 2) under the action of an acidic catalyst, the epoxidized vegetable oil has a ring cleavage reaction with sugar, or sugar alcohol or both sugar and sugar alcohol so as to obtain the vegetable oil polyol. According to the invention, the basic raw materials used in the preparation method--vegetable oil and ring opening agents sugar or sugar alcohol--all originate from biomass, having no dependency on petroleum; the production cost is low and good biodegradation performance is obtained; the preparation method has the characteristics of a simple preparation process and mild reaction conditions, being in accordance with requirements for green chemical industry.

Description

technical field [0001] The invention relates to a vegetable oil polyol and a preparation method thereof, and belongs to the field of pure bio-based vegetable oil polyol and its preparation. Background technique [0002] As a synthetic polymer material, polyurethane has been widely used in many fields due to its excellent physical and chemical properties. At present, since the polyether polyol or polyester polyol used to prepare polyurethane is mainly derived from petroleum, the polyurethane material faces some problems. First of all, as a non-renewable fossil resource, the reserves of petroleum are rapidly decreasing, and the constant changes in petroleum prices lead to great fluctuations in the price of corresponding polyether polyols or polyester polyols; in addition, the production of polyols with petroleum as raw materials The process pollutes the environment more seriously, and the degradability of the polyurethane material obtained by using petroleum-based polyether a...

Claims

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Application Information

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IPC IPC(8): C07C69/732C07C69/675C07C67/31C07H15/04C07H1/00C08G18/32
Inventor 贾连昆张孟钧阚成友郭宝华
Owner TSINGHUA UNIV