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Method for synthesizing unsaturated polyester by using C36 dimer fatty acid

A technology of dimer fatty acid and C36, which is applied in the field of synthesizing unsaturated polyester, and can solve the problems of light color, low reaction temperature and lack of industrial utilization of polyester

Inactive Publication Date: 2017-05-17
ZHONGKAI UNIV OF AGRI & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the reaction temperature of the solution method is low, and the resulting polyester has a light color, but the cost is high, and the post-treatment process is complicated, so it has not been widely used in industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add C with a molar ratio of 1.6:1.47:5.65 into a reaction vessel equipped with a condensing device, a vacuum device, a thermometer, a stirring device, an oil bath heating device, and a four-neck round bottom flask. 36 Dimerized fatty acid, phthalic anhydride and 1,2-propanediol, then add the catalyst p-toluenesulfonic acid, the addition amount is 1.90% (w / w), pass through the nitrogen protection, slowly raise the temperature until the reactant is in a molten state, at 300 rpm -1 Raise the temperature to 170°C under stirring speed, measure the acid value every 0.5 h, when the acid value drops to 100mgKOH·g -1 , stop the reaction to obtain unsaturated polyester prepolymer. Then add prepolymer and maleic anhydride with a molar ratio of 8.72:1.28 in a reaction vessel equipped with a condensing device, a vacuum device, a thermometer, a stirring device, an oil bath heating device and a four-necked round bottom flask, and put the In an oil bath, vacuumize, and stir the react...

Embodiment 2

[0025] Add C with a molar ratio of 1.6:1.93:5.0 to a reaction vessel equipped with a condensing device, a vacuum device, a thermometer, a stirring device, an oil bath heating device, and a four-neck round bottom flask. 36 Dimerized fatty acid, phthalic anhydride and 1,2-propanediol, then add the catalyst p-toluenesulfonic acid, the addition amount is 1.0% (w / w), pass through nitrogen protection, slowly heat up until the reactant is in a molten state, at 300 rpm -1 Raise the temperature to 170°C under stirring speed, measure the acid value every 0.5h, when the acid value drops to 100mgKOH·g -1 , stop the reaction to obtain unsaturated polyester prepolymer. Then add prepolymer and maleic anhydride with a molar ratio of 8.53:1.47 in a reaction vessel equipped with a condensing device, a vacuum device, a thermometer, a stirring device, an oil bath heating device and a four-necked round bottom flask, and put In an oil bath, vacuumize, and stir the reaction for 4 hours at a reacti...

Embodiment 3

[0027] Add C with a molar ratio of 1.6:1.47:5.65 into a reaction vessel equipped with a condensing device, a vacuum device, a thermometer, a stirring device, an oil bath heating device, and a four-neck round bottom flask. 36 Dimerized fatty acid, phthalic anhydride and 1,2-propanediol, then add the catalyst stannous chloride, the addition amount is 1.0% (w / w), pass through nitrogen protection, slowly heat up until the reactant is in a molten state, at 300 rpm -1 Heat up to 170°C under stirring speed, measure the acid value every 0.5 h, when the acid value drops to 100 mgKOH g -1 , stop the reaction to obtain unsaturated polyester prepolymer. Then add prepolymer and maleic anhydride with a molar ratio of 8.72:1.28 in a reaction vessel equipped with a condensing device, a vacuum device, a thermometer, a stirring device, an oil bath heating device and a four-necked round bottom flask, and put the In an oil bath, vacuumize, and stir the reaction for 4 h at a reaction temperature...

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PUM

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Abstract

The invention discloses a method for synthesizing unsaturated polyester by using C36 dimer fatty acid. The method comprises the following steps: (1) a performed polymer of C36 dimer fatty acid, phthalic anhydride, and 1,2-propylene glycol is prepared by using a direct melt polycondensation method; (2) unsaturated polyester is prepared by a reaction of a product in the step (1) and maleic anhydride.

Description

technical field [0001] The present invention relates to a method using C 36 The invention discloses a method for synthesizing unsaturated polyester from dimer fatty acid, which belongs to the field of oleochemical industry. Background technique [0002] In the 21st century, science and technology are facing more and greater challenges in the field of materials and chemicals: First, synthetic polymer materials have become an important part of the national economy and people's lives. As the main raw material for synthetic materials—petroleum, its reserves are increasing. come less and less. While consuming increasingly depleted oil resources, a large amount of waste that is difficult to handle is also produced, which brings harm to the natural environment on which human beings depend for survival. Second, the current so-called "white pollution" problem is far from being resolved. The environmental pollution caused by a large amount of plastic waste and its incineration serio...

Claims

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Application Information

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IPC IPC(8): C08G63/54C08G63/78C08G63/87
Inventor 冯光炷黄雪尹国强
Owner ZHONGKAI UNIV OF AGRI & ENG
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