Modified epoxy acrylate and preparation method thereof

Abstract

The invention discloses a modified epoxy acrylate and a preparation method thereof. Raw materials for synthesizing the modified epoxy acrylate comprise epoxy resin, dibasic acid or acid anhydride, hydroxyl acrylate, a catalyst comprising quaternary ammonium salt and an organometallic compound, a polymerization inhibitor and an antioxidant. The synthesis process is simple, and the quaternary ammonium salt and the organometallic compound are matched and are used as the catalyst, so the reaction time is shortened, and multiple performances of a paint film are improved; and the reaction temperature is properly improved, so the reaction time is shortened. The modified epoxy acrylate synthesized through the method has the characteristics of increased flexibility, fast light curing rate, high hardness after curing, large tensile strength, high film glossiness, and excellent chemical corrosion resistance.

Description

technical field [0001] The invention belongs to the field of organic chemical material synthesis, and in particular relates to a modified epoxy acrylate and a preparation method thereof. Background technique [0002] The synthesis of epoxy acrylate has been patented in the 1950s, and it was not applied to the field of photocuring until the 1970s. Epoxy acrylate is derived from the initial commercialization of epoxy resin and acrylic acid or methacrylate. It is currently the most widely used and the largest type of photocurable oligomer in the domestic photocurable industry. According to the different types of results, epoxy acrylate can be divided into bisphenol A epoxy acrylate, novolac epoxy acrylate, modified epoxy acrylate and epoxy soybean oil acrylate, among which bisphenol A ring The amount of oxyacrylate is the largest. [0003] The molecular structure of bisphenol A epoxy acrylate contains aromatic rings and side hydroxyl groups, which can provide good adhesion; a...

AI Technical Summary

Problems solved by technology

But its main disadvantages are: First, bisphenol A epoxy acrylate has a high viscosity, basically at 50,000-100,000map.s / 40°C, and has extremely poor fluidity at room temperature, almost solid

Therefore, it needs to be baked before use, which leads to inconvenient construction and affects the construction efficiency; second, the rigid structure of bisphenol A epoxy acrylate leads to high brittleness of the cured film, and insufficient flexibility limits its application range; third, in the traditional production In the process, due to the addition of tertiary amine or quaternary ammonium salt catalysts, the catalyst cannot be effectively separated after the reaction, resulting in poor yellowing resistance of the paint film

In fields requiring high yellowing resistance, such as plastic topcoats, paper varnishes, etc., its application is greatly restricted

[0004] To sum up, in response to these disadvantages of bisphenol A epoxy acrylate, researchers have also made some efforts and attempts to improve some of its properties while retaining its advantages, such as introducing fatty acid modified epoxy acrylate Acrylate to improve flexibility; or use epoxy soybean oil to synthesize epoxy acrylate to reduce viscosity and increase flexibility; and first react with dibasic anhydride and hydroxyethyl acrylate and then react with epoxy resin to prepare modified epoxy Conventional methods such as acrylate, but all can only optimize a certain aspect of performance, not comprehensive