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Synthesis method of polyether epoxy resin

A technology of epoxy resin and synthesis method, which is applied in the direction of epoxy resin glue, polyether adhesive, adhesive type, etc., and can solve the problem of low yield of polyether epoxy resin, limited application range, and degradation of material properties, etc. problems, to achieve the effect of improving the bonding strength of the product, simplifying the production process, and improving the damage

Inactive Publication Date: 2019-08-16
JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the continuous improvement of production level, higher requirements are put forward for the selected materials, including various adhesives, especially in the case of high overload, there are higher requirements for the impact resistance of the material itself, and toughened by plasticizers The material is prone to the problem of uneven dispersion and migration of plasticizer, resulting in the decline of material performance
[0004] At present, domestic epoxy products used for flexible potting and coating are almost all toughened by physical blending. Some patents have expounded on polyether epoxy, but the synthesized polyether epoxy resin Low yield, small epoxy value, poor performance of cured product, limited application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh polyether polyol 210 and sodium methoxide according to the molar ratio of polyether polyol hydroxyl to sodium methoxide as 1:4; weigh epichlorohydrin according to the molar ratio of polyether polyol hydroxyl to epichlorohydrin 1:5; Put polyether polyol 210 and sodium methoxide into a reactor equipped with an electric stirring device and a reflux condensing device, raise the temperature to 90°C to 100°C, and react at a constant temperature for 3 hours.

[0028] After the reaction, vacuum filter the mixture to separate excess sodium methoxide; put the above filtered reactant back into the reactor, add a weighed amount of epichlorohydrin and add 1% of the mass of epichlorohydrin as a catalyst Tetrabutylammonium bromide, heated up to 110°C, and reacted at constant temperature for 6 hours; the final reaction mixture was vacuum removed at 110°C and excess epichlorohydrin was recovered, and sodium chloride was separated by filtration, and the obtained product was washed u...

Embodiment 2

[0031] Weigh polyether polyol 330 and sodium methoxide according to the molar ratio of polyether polyol hydroxyl group to sodium methoxide as 1:6; weigh epichlorohydrin according to the molar ratio of polyether polyol hydroxyl group to epichlorohydrin 1:6; Put polyether polyol 330 and sodium methoxide into a reactor equipped with an electric stirring device and a reflux condensing device, raise the temperature to 100°C-110°C, and react at a constant temperature for 5 hours.

[0032] After the reaction, vacuum filter the mixture to separate excess sodium methoxide; put the above filtered reactant back into the reactor, add a weighed amount of epichlorohydrin and add 1% of the mass of epichlorohydrin as a catalyst Benzyl-3-ethylammonium chloride, heated up to 110°C, and reacted at a constant temperature for 5 hours; the final reaction mixture was vacuum removed at 110°C and excess epichlorohydrin was recovered, sodium chloride was separated by filtration, and the obtained product...

Embodiment 3

[0035] Weigh polyether polyol 310 and sodium methoxide according to the molar ratio of polyether polyol hydroxyl to sodium methoxide as 1:2; weigh epichlorohydrin according to the molar ratio of polyether polyol hydroxyl to epichlorohydrin 1:2; Put polyether polyol 310 and sodium methoxide into a reactor equipped with an electric stirring device and a reflux condensing device, raise the temperature to 100°C-110°C, and react at a constant temperature for 4 hours.

[0036] After the reaction, vacuum filter the mixture to separate excess sodium methoxide; put the above filtered reactant back into the reactor, add a weighed amount of epichlorohydrin and add 1% of the mass of epichlorohydrin as a catalyst Benzyl-3-ethylammonium chloride, heated up to 110°C, and reacted at a constant temperature for 6 hours; the final reaction mixture was vacuum removed at 110°C and excess epichlorohydrin was recovered, sodium chloride was separated by filtration, and the obtained product was washed ...

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PUM

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Abstract

The invention discloses a synthesis method of polyether epoxy resin, the synthesis method comprises the following steps: 1, weighing polyether polyol and sodium methoxide according to a molar ratio ofpolyether polyol hydroxyl to sodium methoxide of 1: (2-6), and weighing epichlorohydrin according to a molar ratio of polyether polyol hydroxyl to epichlorohydrin of 1: (2-8); 2, putting the polyether polyol and the sodium methoxide into a reactor with an electric stirring device and a reflux condensing device, heating to 70-110 DEG C, and reacting for 2-7 hours at constant temperature; 3, performing vacuum filtration on the mixture after the reaction is finished, and separating out excess sodium methoxide; 4, putting the filtered reactant back into the reactor, adding the epichlorohydrin weighed in the step 1, adding a phase catalyst with the mass of 1% of the mass of the epichlorohydrin, heating to 90-140 DEG C, and reacting at constant temperature for 2-6 hours; and 5, removing under vacuum and recovering excess epichlorohydrin from the final reaction mixture at 60-110 DEG C, filtering and separating sodium chloride, washing the obtained product to neutrality with water, and removing the water to obtain the polyether epoxy resin.

Description

technical field [0001] The invention relates to a production method of epoxy resin, in particular to a synthesis method of polyether epoxy resin. Background technique [0002] In addition to the excellent performance of bisphenol A epoxy resin, the polyether epoxy resin of the present invention also has its unique performance, especially the resilience and weather resistance of the cured product are better than those of general epoxy resins containing benzene rings, which greatly increases its scope of application. Due to the structure of bisphenol A epoxy resin itself, the cured product has poor resilience. In some applications, plasticizers need to be added to improve its performance, such as flexible potting of dry-type transformers, power lamps and electrical products. [0003] With the continuous improvement of production level, higher requirements are put forward for the selected materials, including various adhesives, especially in the case of high overload, there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/04C08G65/00C09J163/00C09J171/00
CPCC08G59/04C08G65/00C09J163/00C09J171/00
Inventor 陈建
Owner JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA