5-aldehyde resorcinol diglycidyl ether and preparation method thereof
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A technology of aldehyde resorcinol and diglycidyl ether, which is applied in the field of glyceryl ether and its preparation, can solve problems such as poor bonding strength, achieve good heat resistance, good fluidity and processing performance, and mild reaction conditions Effect
Active Publication Date: 2019-03-22
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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[0004] The present invention aims to solve the problem that the existing glycidyl ether epoxy resin has poor bonding strength at high temperature, and provides 5-formyl resorcinol diglycidyl ether and its preparation method
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specific Embodiment approach 1
[0028] Specific embodiment one: the molecular structural formula of the present embodiment 5-formyl resorcinol diglycidyl ether is:
[0029]
specific Embodiment approach 2
[0030] Specific embodiment two: the preparation method of 5-formyl resorcinol diglycidyl ether of the present embodiment comprises the following steps:
[0031] 1. Put 3,5-dihydroxybenzaldehyde, epibromohydrin and catalyst into the reaction kettle, raise the temperature to 80℃~100℃, stir for 2h~8h, then raise the temperature to the reflux temperature to remove the excess epoxybromopropane Evaporate under reduced pressure, recover and recycle to obtain a concentrated solution; wherein the molar ratio of 3,5-dihydroxybenzaldehyde and epibromohydrin is 1: (6-20), the ratio of 3,5-dihydroxybenzaldehyde and catalyst The mass ratio is 100: (0.1~5);
[0032] 2. After the temperature of the concentrated solution is cooled to 40°C to 60°C, add organic solvent and metal alkali solid particles, and continue to stir for 2h to 6h; wherein the mass ratio of 3,5-dihydroxybenzaldehyde to organic solvent is 1:(10 ~25), the molar ratio of 3,5-dihydroxybenzaldehyde to metal alkali solid particl...
specific Embodiment approach 3
[0034] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the catalyst is benzyltriethylammonium chloride, tetrabutylammonium bromide, tetrabutylammonium chloride, tetrabutylammonium bisulfate , one of trioctylmethyl ammonium chloride, dodecyltrimethylammonium chloride, tetradecyltrimethylammonium chloride, 18-crown-6, 15-crown-5 or A mixture of several. Others are the same as in the first embodiment.
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Abstract
The invention discloses 5-aldehyde resorcinol diglycidyl ether and a preparation method thereof, relates to glycidyl ether and a preparation method thereof, and aims at solving the problem of poorer bonding strength of the conventional glycidyl ether epoxy resin at high temperature. The preparation method of the 5-aldehyde resorcinol diglycidyl ether comprises the following steps: firstly, putting3,5-dihydroxy benzaldehyde, epibromohydrin and a catalyst into a reaction still, raising the temperature for reaction, decompressing and evaporating out to obtain a concentrated solution; secondly, after the temperature of the concentrated solution is lowered, adding an organic solvent and metal alkali solid particles and stirring; thirdly, after the reaction ends, repeatedly washing with water,and separating liquid to remove an aqueous phase; finally, performing reduced pressure distillation on an organic phase to remove an organic solvent, and recycling to obtain the 5-aldehyde resorcinoldiglycidyl ether. The 5-aldehyde resorcinol diglycidyl ether is used for preparing a high temperature resisting epoxy resin adhesive. The epoxy resin adhesive prepared from the 5-aldehyde resorcinol diglycidyl ether disclosed by the invention has the characteristic of high temperature resistance. The 5-aldehyde resorcinol diglycidyl ether and the preparation method disclosed by the invention are used for the field of the epoxy resin adhesives.
Description
technical field [0001] The invention relates to a glycerol ether and a preparation method thereof. Background technique [0002] Epoxy resin refers to a compound containing two or more epoxy groups in its molecular structure. This kind of resin has excellent physical and mechanical properties, chemical stability, corrosion resistance, heat resistance and adhesive properties. It has been widely used in aviation, aerospace, chemical industry, machinery, electronics, automobiles and other fields, and plays an extremely important role in the development of the national economy. important role. [0003] Traditional glycidyl ether epoxy resin has excellent mechanical properties and processing properties, and is widely used in aerospace and other fields. Bisphenol A glycidyl ether is a type of epoxy resin with the largest amount and the widest application range at present. In practical applications, the temperature resistance level is slightly insufficient, and it is easy to caus...
Claims
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