A kind of thermosetting rosin-based resin composition and preparation method thereof

Abstract

The invention relates to the field of resin compositions, in particular to a thermosetting rosin-based resin composition and a preparation method thereof. The invention comprises modified rosin, glycol and crosslinking agent. The mass ratio of modified rosin, glycol and crosslinking agent is 1:0.2-0.8:0.3-1.5. The present invention adopts aziridine as cross-linking agent, and the reactivity of the cross-linking agent with carboxyl group in rosin is very high, and the cross-linking speed is fast. The preparation method of the invention has simple and easy steps, fewer raw materials involved in the whole cross-linking process, no need of special equipment and any catalyst, low reaction temperature, short time and mild conditions, which is beneficial to industrial production. The prepared rosin-based resin composition has a uniform and smooth appearance. By changing the type and amount of modified rosin and glycol, the material elasticity, strength, color and transparency of the rosin-based resin composition can be adjusted, which greatly broadens the composition of the rosin-based resin. application fields of biomaterials.

Description

technical field [0001] The invention relates to the field of resin compositions, in particular to a thermosetting rosin-based 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 yea...

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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-based epoxy resin composition, this method first generates rosin-based epoxy resin monomer by maleopimaric anhydride and epichlorohydrin under the action of catalyst, and then this monomer is cured with The agent is solidified under the action of organic amine or imidazole to form a rosin-based epoxy resin composition. It is not difficult to see that this method is relatively complicated and brings great inconvenience to industrial production.

In addition, the Chinese patent CN103113551B prepared a rosin-based shape-memory polyurethane. The composite material first prepared a rosin-based chain-extending group by esterification under the protection of nitrogen, and then cross-linked with isocyanate under the action of a catalyst. The method is also cumbersome. , takes a long time, and requires special conditions such as inert gas protection, which is not conducive to industrial production

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