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Eugenol-based polyol and preparation method thereof

A eugenol-based, polyol technology, applied in the preparation of thioethers, organic chemistry, etc., can solve the problems of high energy consumption, single rigid segment or flexible segment, and complicated preparation methods, and achieves easy products and efficient and rapid reactions. , Solve the effect of the cumbersome preparation method

Inactive Publication Date: 2022-03-15
SHAANXI UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to solve the problems that most of the existing polyols are derived from non-renewable petroleum resources, and the molecular structure of polyols has a single rigid segment or flexible segment, the preparation method is cumbersome, and the energy consumption is high, the present invention provides a eugenol The eugenol-based polyol and its preparation method prepare the eugenol-based polyol through the mercapto-ene click reaction under ultraviolet light irradiation, and the eugenol-based polyol has the advantages of high yield, mild preparation conditions, simple steps, low energy consumption, molecular The advantages of the coexistence of rigid chains and flexible chains in the structure

Method used

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  • Eugenol-based polyol and preparation method thereof

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preparation example Construction

[0026] The preparation method of eugenol-based polyol of the present invention comprises the steps:

[0027] Step 1: According to the amount of substances, 100 parts of eugenol, 1300-1600 parts of ethanol, 60-90 parts of potassium carbonate, and 3-5 parts of potassium iodide are mixed by a magnetic stirrer at a temperature of 25°C. When the color of the solution turns dark green, dissolve 50-70 parts of 1,4-dibromobutane in 10 parts of ethanol, and slowly drop it into the reaction system through a constant pressure funnel. Then, raise the temperature to 70-80°C and heat to reflux for 8-12h; after the reaction, cool to room temperature, and keep the crude product for 16 hours to fully crystallize, filter the mixture, wash the obtained solid with hot water, and re- Crystallize and then dry in a vacuum oven at 60°C, and the resulting white powder is 1,4-bis(4-allyl-2-methoxyphenoxy)butane.

[0028] Step 2: According to the amount of substance, 20 parts of intermediate product 1,...

Embodiment 1

[0037] 1. Preparation of Eugenol-based Polyols

[0038]Step 1: According to the amount of substances, 100 parts of eugenol, 1300 parts of ethanol, 60 parts of potassium carbonate, and 3 parts of potassium iodide were mixed by a magnetic stirrer at a temperature of 25°C. When the color of the solution turned dark green, 50 parts of 1,4-dibromobutane was dissolved in 10 parts of ethanol, and slowly added dropwise into the reaction system through a constant pressure funnel. Then, the temperature was raised to 70°C and heated to reflux for 8h; after the reaction, cooled to room temperature, and the crude product was kept for 16 hours to fully crystallize, the mixture was filtered, the obtained solid was washed with hot water, and recrystallized, and then in After drying in a vacuum oven at 60°C, the resulting white powder is 1,4-bis(4-allyl-2-methoxyphenoxy)butane.

[0039] Step 2. According to the amount of substance, 20 parts of intermediate product 1,4-bis(4-allyl-2-methoxyphe...

Embodiment 2

[0043] 1. Preparation of Eugenol-based Polyols

[0044] Step 1: According to the amount of substances, 100 parts of eugenol, 1450 parts of ethanol, 75 parts of potassium carbonate and 4 parts of potassium iodide were mixed by a magnetic stirrer at a temperature of 25°C. When the color of the solution turned dark green, 60 parts of 1,4-dibromobutane was dissolved in 10 parts of ethanol, and slowly added dropwise into the reaction system through a constant pressure funnel. Then, the temperature was raised to 75° C. and heated to reflux for 10 h; after the reaction was completed, it was cooled to room temperature, and the crude product was kept for 16 hours to fully crystallize, the mixture was filtered, and the obtained solid was washed with hot water and recrystallized, and then in After drying in a vacuum oven at 60°C, the resulting white powder is 1,4-bis(4-allyl-2-methoxyphenoxy)butane.

[0045] Step 2. According to the amount of substance, 20 parts of intermediate product ...

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Abstract

The invention provides eugenol-based polyol and a preparation method thereof, the eugenol-based polyol is structurally characterized in that the eugenol-based polyol is a monomer with bifunctionality or tetrafunctionality, and the molecular structure of the eugenol-based polyol not only contains ether bonds and flexible long carbon chains as soft segments, but also contains rigid benzene ring structures as hard segments. Therefore, when the polyhydric alcohol is used for replacing petroleum-based polyhydric alcohol to prepare a green polyurethane material, the ratio of a rigid chain segment to a flexible chain segment in a system is regulated and controlled by controlling the dosage of the polyhydric alcohol, and the strength and toughness of the material can be balanced and considered.

Description

technical field [0001] The invention belongs to the technical field of biomass-based polyols, and in particular relates to a eugenol-based polyol based on light click reaction and a preparation method thereof. Background technique [0002] Polyurethane is a material with excellent properties, a wide range of products and various application fields. Most of the main raw material polyols used in the preparation of traditional polyurethane materials come from non-renewable petrochemical resources. With the increasing shortage of petrochemical resources and the improvement of people's awareness of environmental protection, the use of renewable resources to prepare biomass-based polyols and use them to develop "green" polyurethane materials has become a research hotspot. [0003] At present, there have been many reports on the research and patents on the preparation of biomass-based polyols. Vegetable oil (such as castor oil, soybean oil, palm oil, etc.), plant cellulose, ligni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C323/16C07C319/18
CPCC07C323/16
Inventor 张跃宏徐欣欣吴振强沈连根严雪峰胡丽贞徐华伟赵舜华马建中吕斌
Owner SHAANXI UNIV OF SCI & TECH
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