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Method for producing low molecular polyamide from tung oi

A low-molecular polyamide and tung oil technology, which is applied in the field of low-molecular polyamide prepared from tung oil, can solve the problems of unsatisfactory mechanical properties of tensile strength and tensile shear strength, low heat distortion temperature, low hardness, etc., and achieve good mechanical properties. Effects of performance, consumption reduction, and high heat resistance

Inactive Publication Date: 2005-06-29
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of product structure, the low-molecular-weight polyamide prepared by dimer (tung) acid contains a large amount of aliphatic long carbon chains, which is a binary linear structure. After curing with epoxy resin, it shows some weaknesses. Mechanical properties such as hardness and lower heat deflection temperature, tensile strength and tensile shear strength are less than ideal

Method used

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  • Method for producing low molecular polyamide from tung oi
  • Method for producing low molecular polyamide from tung oi

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Preparation of Methyl Caryonate

[0025] In a 500ml three-neck flask equipped with a constant temperature oil bath, a stirring device, a thermometer, and a reflux condenser, add 298 grams of tung oil, heat to 120 ° C, dehydrate under reduced pressure for 1 to 2 hours, cool to 50 ° C, add 260 grams of methanol, 5 gram of potassium hydroxide, reacted at 60-70°C for 4 hours, recovered excess methanol, and cooled to room temperature. Glycerol was separated, and after washing to remove the catalyst, free water was distilled off to obtain 280 grams of methyl lyceate.

[0026] (2) Preparation of Methyl Caryonate Anhydride Adduct

[0027] In a 500ml three-necked flask equipped with a constant temperature oil bath, a stirring device, a thermometer, and a distillation device, add 298 grams of methyl laurate, 120 grams of maleic anhydride, and 8.5 grams of aluminum trichloride, and heat to 80°C. After -9 hours, the unreacted maleic anhydride was distilled off under negative ...

Embodiment 2

[0031] (1) Preparation of Methyl Caryonate

[0032] In a 500ml three-neck flask equipped with a constant temperature oil bath, a stirring device, a thermometer, and a reflux condenser, add 298 grams of tung oil, heat to 120 ° C, dehydrate under reduced pressure for 1 to 2 hours, cool to 50 ° C, add 260 grams of methanol, 5 gram of potassium hydroxide, reacted at 60-70°C for 4 hours, recovered excess methanol, and cooled to room temperature. Glycerol was separated, and after washing to remove the catalyst, free water was distilled off to obtain 280 grams of methyl lyceate.

[0033] (2) Preparation of Methyl Caryonate Acid (Anhydride) Adduct

[0034] In a 500ml three-necked flask equipped with a constant temperature oil bath, a stirring device, a thermometer, and a distillation device, add 298 grams of methyl laurate, 120 grams of maleic anhydride, and 8.5 grams of aluminum trichloride, and heat to 80°C. After -9 hours, the unreacted maleic anhydride was distilled off under ne...

Embodiment 3

[0038] (1) Preparation of Methyl Caryonate

[0039] In a 500ml three-neck flask equipped with a constant temperature oil bath, a stirring device, a thermometer, and a reflux condenser, add 298 grams of tung oil, heat to 120 ° C, dehydrate under reduced pressure for 1 to 2 hours, cool to 50 ° C, add 260 grams of methanol, 5 gram of potassium hydroxide, reacted at 60-70°C for 4 hours, recovered excess methanol, and cooled to room temperature. Glycerol was separated, and after washing to remove the catalyst, free water was distilled off to obtain 280 grams of methyl lyceate.

[0040] (2) Preparation of Methyl Caryonate Acid (Anhydride) Adduct

[0041] In a 500ml three-necked flask equipped with a constant temperature oil bath, a stirring device, a thermometer, and a distillation device, add 298 grams of methyl laurate, 120 grams of maleic anhydride, and 8.5 grams of aluminum trichloride, and heat to 80°C. After -9 hours, the unreacted maleic anhydride was distilled off under ne...

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Abstract

The method of preparing low molecular polyamide by china wood oil relates to a different method to prepare epoxide resin curing agent. Firstly, china wood oil and methyl alcohol have ester interchange with the inorganic alkali or Louis catalyst which is 0:1%-5% of china wood oil, generating methyl jasmonate, then have addition reaction of methyl jasmonate it and unsaturated binary acid with Louis, generating which finally has amidation with polybasic amine in 150-230deg.C; then clear away the material did not react, acquiring low molecular polyamide. The invention has no pollution to the environment, low energy cost, the epoxide resin and its solified product have good resistance to heat and high mechanical strength.

Description

technical field [0001] The invention relates to different preparation methods of epoxy resin curing agent, in particular to a method for preparing low-molecular polyamide from tung oil. Background technique [0002] Epoxy resin has excellent technological properties, mechanical properties and physical properties. It is widely used in the fields of machinery, electricity, electronics, aviation, aerospace, chemical industry, transportation, construction, etc. . Epoxy resin has practical significance only when it is used together with curing agent. It can be seen that the structure and quality of curing agent will directly affect the performance and application of cured epoxy resin. The research and development of curing agents at home and abroad are far more active than the research and development of epoxy resin varieties. Every time a new curing agent is developed, it can solve a practical problem in one aspect, which is equivalent to developing...

Claims

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Application Information

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IPC IPC(8): C08G59/44C08G69/26
Inventor 夏建陵王定选聂小安杨小华
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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