阅读说明：本技术 一种环氧树脂及其制备方法 (Epoxy resin and preparation method thereof ) 是由 宋云霞 于 2019-10-17 设计创作，主要内容包括：本发明提供了一种环氧树脂,其分子结构为<Image he="243" wi="700" file="DDA0002237621890000011.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>R1为C<Sub>15</Sub>H<Sub>25</Sub>、C<Sub>15</Sub>H<Sub>27</Sub>、C<Sub>15</Sub>H<Sub>29</Sub>或C<Sub>15</Sub>H<Sub>31</Sub>的直链结构。本发明还提供了一种环氧树脂的制备方法。本发明的环氧树脂具有非常好的柔韧性,与主流的的双酚A(F)树脂具有良好的互补性,且与双酚A(F)环氧树脂及其固化剂具有良好的相容性。(the invention provides an epoxy resin with a molecular structure of R1 is C 15 H 25 、C 15 H 27 、C 15 H 29 Or C 15 H 31 The linear structure of (1). The invention also provides a preparation method of the epoxy resin. The epoxy resin has very good flexibility, good complementarity with mainstream bisphenol A (F) resin, and good compatibility with bisphenol A (F) epoxy resin and a curing agent thereof.)

1. an epoxy resin characterized by: has a molecular structure ofR1 is C₁₅H₂₅、C₁₅H₂₇、C₁₅H₂₉Or C₁₅H₃₁and (3) a linear structure of (1), wherein n is 0 to 100.

2. The process for producing an epoxy resin according to claim 1, wherein: adding a substrate A1 into a reaction vessel with a mechanical stirring device, wherein the substrate A1 has a structural formular1 is C₁₅H₂₅、C₁₅H₂₇、C₁₅H₂₉Or C₁₅H₃₁Adding epoxy chloropropane, diluting with 0-10 times of an inert organic solvent of A1 weight, adding 30-60% by mass of an alkaline water solution under a stirring state, keeping the temperature at 50-100 ℃, stirring for 2-5 hours, then adding water, wherein the material ratio of the substrate A1, the epoxy chloropropane, the 30-60% by mass of the alkaline water solution and the water is 318 g: 93.6g-2590 g: 50g-400 g: stirring for 20-50 minutes by 100g of organic solvent, standing for layering for 2-10 hours, discharging the lower water phase after the layering is completed, washing for 1-3 times, vacuumizing the upper oil phase at 60-120 ℃ to remove unreacted epoxy chloropropane, organic solvent and residual moisture, and filtering to obtain the epoxy resin as claimed in claim 1.

3. The method for preparing an epoxy resin according to claim 2, wherein: the alkaline water solution is sodium hydroxide or potassium hydroxide solution.

4. The method for preparing an epoxy resin according to claim 2, wherein: the inert organic solvent is toluene, xylene or benzene.

5. The method for preparing an epoxy resin according to claim 2, wherein: the addition amount of the inert organic solvent is 0-10 times of the weight of the reaction substrate phenol.

The technical field is as follows:

The invention belongs to the field of chemical industry, and relates to an epoxy resin, in particular to an epoxy resin and a preparation method thereof.

Background art:

Cardanol (Cardanol) is extracted from natural cashew nut shell oil by advanced technology, and can replace or partially replace phenol to be used for manufacturing epoxy curing agent, liquid phenolic resin and liquid or powdered thermosetting phenolic resin. The cardanol has the following characteristics due to the special chemical structure: 1. the benzene-containing ring structure has high temperature resistance; 2. polar hydroxyl groups can provide wetting and activity of the system to the contact surface; 3. the meta-position carbon 15 straight chain containing unsaturated double bonds can provide good toughness, excellent hydrophobicity, low permeability and self-drying property for the system.

Cardanol is not a pure substance, and contains a series of substances with a diphenol structure besides a main monophenol structure substance, and the diphenol substance, namely cardol, is obtained by means of distillation or solvent extraction purification.

The invention content is as follows:

The invention provides an epoxy resin and a preparation method thereof, and aims to solve the technical problem of insufficient toughness of the epoxy resin in the prior art.

the invention provides an epoxy resin with a molecular structure of

R1 is C₁₅H₂₅、C₁₅H₂₇、C₁₅H₂₉Or C₁₅H₃₁And (3) a linear structure of (1), wherein n is 0 to 100.

The invention also provides a preparation method of the epoxy resin, which comprises the step of adding a substrate A1 into a reaction vessel with a mechanical stirring device, wherein the substrate A1 has a structural formulaR1 is C₁₅H₂₅、C₁₅H₂₇、C₁₅H₂₉Or C₁₅H₃₁Adding epoxy chloropropane, diluting with 0-10 times of an inert organic solvent of A1 weight, adding 30-60% by mass of an alkaline water solution under a stirring state, keeping the temperature at 50-100 ℃, stirring for 2-5 hours, then adding water, wherein the material ratio of the substrate A1, the epoxy chloropropane, the 30-60% by mass of the alkaline water solution and the water is 318 g: 93.9-2590 g: 50g-400 g: stirring for 20-50 minutes by using 100g of organic solvent, standing for layering for 2-10 hours, discharging the lower water phase after layering is completed, washing for 1-3 times, vacuumizing the upper oil phase at 60-120 ℃ to remove unreacted epoxy chloropropane, organic solvent and residual moisture, and filtering to obtain the epoxy resin.

Further, the alkaline aqueous solution is sodium hydroxide or potassium hydroxide solution.

r1 is C₁₅H₂₅、C₁₅H₂₇、C₁₅H₂₉or C₁₅H₃₁The linear structure of (1).

Further, the inert organic solvent is toluene, xylene or benzene.

Further, the amount of the inert organic solvent added is 0 to 10 times, preferably 5 to 10 times, the weight of the reaction substrate phenol.

Compared with the prior art, the invention has the advantages of positive and obvious technical effect. The epoxy resin has very good flexibility, good complementarity with mainstream bisphenol A (F) resin, and good compatibility with bisphenol A (F) epoxy resin and a curing agent thereof.

The specific implementation mode is as follows: