A kind of rosin epoxy resin composition and preparation method thereof

Abstract

The invention relates to the field of resin compositions, and in particular to a rosin epoxy resin composition and a preparation method thereof. The rosin epoxy resin is prepared from modified rosin, epoxy resin, citric acid and a promoter, wherein the epoxy resin comprises epoxy resin I and epoxy resin II; the epoxy resin I is bisphenol A type epoxy resin; the epoxy resin II is aliphatic epoxy resin; the mass ratio of the modified rosin to the epoxy resin I, the epoxy resin II, the citric acid and the promoter is 1:(0-0.6):(0-0.6):(0-0.2):(0.005-0.03); the mass ratio of the modified rosin to the epoxy resin is 1:(0.5-1.2). The rosin epoxy resin composition provided by the invention is uniform and smooth in appearance, and by changing the types or the amounts of the modified rosin, the epoxy resin and the citric acid, properties such as the color, the toughness and the hardness of a rosin epoxy resin composition material can be modified, so that the application range of the rosin epoxy resin composition material can be greatly widened.

Description

technical field [0001] The invention relates to the field of resin compositions, in particular to a rosin epoxy resin composition and a preparation method thereof. Background technique [0002] Bio-based polymer materials refer to a class of materials prepared with renewable substances as the main raw materials. They have the characteristics of greenness, environmental friendliness, and renewable raw materials that traditional polymer materials do not have. They can reduce human consumption of non-renewable materials such as petroleum and coal Dependence on resources has the dual effects of protecting the environment and saving resources, and is currently a hot research topic at home and abroad. [0003] Rosin is processed from the exudation of pine or pine tree trunks. It is a renewable, non-toxic, degradable and low-cost natural resin that has been widely used in adhesives, coatings, inks and other fields. my country is rich in rosin resources. In recent years, the annual...

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Problems solved by technology

Chinese patent CN101864066A discloses a method for preparing rosin-based elastomers, using modified rosin, polycaprolactone diol, and citric acid as raw materials, and preparing rosin-based elastomers through esterification under the action of catalysts such as stannous oxalate. Elastomer, this method has complex steps, many types of raw materials are required, and the reaction time is long, the reaction temperature needs to be above 200°C, which can easily lead to carbonization of rosin

CN102250318B provides a kind of preparation method of rosin base epoxy resin composition, this method utilizes rosin and maleic anhydride to prepare maleopimaric anhydride at first under the action of high temperature, inert atmosphere and strong acid catalyst, then maleopimaric anhydride and ring Oxychlorohydrin generates rosin-based epoxy resin monomer under basic catalyst and inert atmosphere conditions, and then this monomer solidifies with maleopimaric anhydride under the effect of organic amine or imidazole to generate rosin-based epoxy resin composition, without It is difficult to see that this method is relatively complicated, and the raw materials used are highly toxic and have many types, which brings great inconvenience to industrial production.

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