Synthesis method of trifunctional rosin-based epoxy resin

Abstract

The invention discloses a synthesis method of a trifunctional rosin-based epoxy resin. A bio-based epoxy resin is synthesized through the method and can be used for replacing the petrochemical productbisphenol-A epoxy resin; for the problems that in the process of synthesizing MPA-ER with MPA, ring opening of anhydride bonds is difficult, the esterification reaction efficiency is low, the synthesized MPA-ER is large in viscosity, low in epoxy value and deep in color and the reaction time is long, MPa is used for synthesizing MPA-ER, and the above problems can be solved to some extent. According to the method, synthetic MPA is converted into MPa with higher reactivity, and then MPA-ER is synthesized; so far, there are few related documents and patent reports about the synthesis route. Thepreparation method of the trifunctional rosin-based epoxy resin has the advantages that the preparation process is simple, the operability is high, the reaction conditions are easy to control, and industrial production is facilitated.

Description

Technical field [0001] The invention relates to the technical field of epoxy resins, in particular to a method for synthesizing trifunctional rosin-based epoxy resins. Background technique [0002] Rosin is a natural resin obtained by distilling a viscous liquid secreted from pine trees. Its main component is resin acid. It is a brittle glass-like material at room temperature. Because of its molecular characteristics such as fused rings, it is compatible with some petroleum-based resins. The rigid structure of alicyclic or aromatic is similar, so rosin becomes the raw material for preparing some new polymers with specific chemical structure and value characteristics. It is widely used in medical treatment, electrical appliances, flux, paint, viscosity modifier, paper glaze, soap , Food and other fields. [0003] As one of the three most important thermosetting polymers, epoxy resin is widely used in many fields such as coatings, adhesives, circuit boards, electronic component pack...

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Problems solved by technology

Wang Dan and others synthesized castor oil-based polyurethane (COPU), using COPU as a curing agent, and adding different contents of carbon nanotubes (CNTs) to the prepared MPA-ER / COPU system to improve its thermal properties. It was found that when the CNTs content was At 0.4% of the curing system, the Tg of the MPA-ER / COPU / CNTs system reaches a maximum of 150°C, which is 52.4°C higher than that of the MPA-ER / COPU system, and its initial decomposition temperature and activation energy of thermal degradation reactions have also been improved. ; Also synthesized water-based MPA-ER, water-based COPU, and prepared graphene oxide (GO), adding GO to the MPA-ER / COPU system to improve thermal performance, when the content of GO reached 0.8%, MPA-ER / COPU The Tg of the / GO system is as high as 181.1 °C, which is 88.8 °C higher than that of the MPA-ER / COPU system. The coating test found that the MPA-ER / COPU / GO system has good physical and chemical properties. The addition of GO will increase the impact strength and Decreased elasticity, not suitable as an additive for this kind of coating

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