Synthesis method of ricinoleic acid based polyester polyol

A technology of ricinoleic acid and synthesis method, applied in the field of polyurethane industry, can solve problems such as limiting large-scale application, small molecular weight, etc., and achieve the effects of excellent adhesion, simple operation, and convenient processing

Inactive Publication Date: 2017-05-31
SHAANXI HI-TECH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Castor oil is a renewable trifunctional polyol, but due to its relatively small molecular weight, it cannot completely replace the current industrialized polyol, and because it is a p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The synthetic method of ricinoleic acid-based polyester polyol of the present invention comprises the following steps:

[0014] The first step, the preparation of castor oil methyl ester

[0015] In a 500mL three-necked flask equipped with an electric stirrer, a reflux condenser and a thermometer, add 250g of pre-dehydrated castor oil, heat it to 35 degrees in a constant temperature water bath, and then add 54g of 5% KOH-CH 3 0H solution, after stirring for 2 hours, add 10% HCl to neutralize to pH 4-4.5, pour the reaction solution into a separatory funnel, let it stand for layers, separate the lower layer of glycerin-methanol solution, and use 100mL deionized solution for the upper layer Water was washed 3 times to neutrality, and dehydration was distilled off under reduced pressure to obtain 247g of clear and transparent castor oil methyl ester;

[0016] The second step, the synthesis of ricinoleic acid-based polyester polyol diol

[0017] Add the castor oil methyl e...

Embodiment 2

[0019] The synthetic method of ricinoleic acid-based polyester polyol of the present invention comprises the following steps:

[0020] The first step, the preparation of castor oil methyl ester

[0021] In a 500mL three-necked flask equipped with an electric stirrer, a reflux condenser and a thermometer, add 250g of pre-dehydrated castor oil, heat it to 35 degrees in a constant temperature water bath, and then add 54g of 5% KOH-CH 3 0H solution, after stirring for 2 hours, add 10% HCl to neutralize to pH 4-4.5, pour the reaction solution into a separatory funnel, let it stand for layers, separate the lower layer of glycerin-methanol solution, and use 100mL deionized solution for the upper layer Water was washed 3 times to neutrality, and dehydration was distilled off under reduced pressure to obtain 247g of clear and transparent castor oil methyl ester;

[0022] The second step, the synthesis of ricinoleic acid-based polyester polyol diol

[0023] Add the castor oil methyl e...

Embodiment 3

[0026] The synthetic method of ricinoleic acid-based polyester polyol of the present invention comprises the following steps:

[0027] The first step, the preparation of castor oil methyl ester

[0028] In a 500mL three-necked flask equipped with an electric stirrer, a reflux condenser and a thermometer, add 250g of pre-dehydrated castor oil, heat it to 35 degrees in a constant temperature water bath, and then add 54g of 5% KOH-CH 3 0H solution, after stirring for 2 hours, add 10% HCl to neutralize to pH 4-4.5, pour the reaction solution into a separatory funnel, let it stand for layers, separate the lower layer of glycerin-methanol solution, and use 100mL deionized solution for the upper layer Water was washed 3 times to neutrality, and dehydration was distilled off under reduced pressure to obtain 247g of clear and transparent castor oil methyl ester;

[0029] The second step, the synthesis of ricinoleic acid-based polyester polyol diol

[0030] Add castor oil methyl ester...

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PUM

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Abstract

The invention provides a synthesis method of ricinoleic acid based polyester polyol, and relates to the field of polyurethane industry, in particular to the synthesis method of the ricinoleic acid based polyester polyol. The method comprises the following steps that castor oil methyl ester is prepared; in a 500mL three-necked flask provided with an electric stirrer, a backflow condenser and a temperature indicator, 250g of castor oil subjected to pre-dehydration treatment is added; after the constant-temperature water bath heating is performed to 35 DEG C, 54g of 5-percent KOH-CH30H solution is added; stirring reaction is performed for 2h, then, 10-percent HCl is added for neutralization until a pH value is 4 to 4.5; reaction liquid is poured into a separating funnel; standing is performed for layer seperation, so that a lower layer glycerol-methanol solution is separated out; an upper layer is washed for 3 times by 100 mL of deionized water until a neutral state is formed; reduced pressure distillation dewatering is performed to obtain 247g of clear and transparent castor oil methyl ester. The synthesis method has the advantages that the operation is simple; the processing is convenient; the product quality is ensured; the product performance is improved; good film forming performance, high hardness, excellent adhesion force and good water-resistant and oil-resistant performance are realized.

Description

technical field [0001] The invention relates to the field of polyurethane industry, in particular to a synthesis method of ricinoleic acid-based polyester polyol. Background technique [0002] Polyester polyol is the main raw material for preparing polyurethane materials, which can be used to prepare polyurethane rubber, elastomers, adhesives, coatings, foams and other materials. Polyester polyol type polyurethane resin has excellent wear resistance, temperature resistance and oil resistance, among which adipic acid polyester polyol has formed a series of products. The raw materials used in current polyester polyols basically come from petroleum products. With the increasing consumption of petroleum resources, the use of renewable resources to replace petroleum resources to produce polyurethane materials has attracted more and more attention. [0003] Castor oil is a renewable trifunctional polyol, but due to its relatively small molecular weight, it cannot completely repla...

Claims

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Application Information

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IPC IPC(8): C08G63/49C11C3/04C08G18/68
CPCC08G63/48C08G18/68C11C3/04
Inventor 王耀斌
Owner SHAANXI HI-TECH IND CO LTD
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