Method for preparing thermosetting phenol resin

Abstract

The invention provides a method for preparing a thermosetting phenol resin. The method comprises the following steps: mixing a phenol compound, an aldehyde compound, an amine compound and a catalyst to have a reaction, standing, layering, dehydrating in vacuum, thus obtaining the thermosetting phenol resin. Compared with the prior art, the method has the advantages that the added amine compound participates in the reaction, the polarity of the resin can be reduced by the reaction products, which is beneficial to separation of the resin layer from the water layer; therefore, the dehydration time at the later stage is reduced, the solid thermosetting phenol resin with stable quality is favorably prepared; and the method is simple in operation and easy to control.

Description

technical field [0001] The invention belongs to the technical field of phenolic resins, in particular to a preparation method of thermosetting phenolic resins. Background technique [0002] Phenolic resin is the earliest industrialized synthetic resin in the world. It has a history of nearly a hundred years. Due to its easy-to-obtain raw materials, low price, simple production process and equipment, and more importantly, its intended properties have been widely used in all areas of daily life. [0003] Phenolic resins can be divided into thermosetting resins and thermoplastic resins. Due to the large number of active groups in the resin structure, thermosetting phenolic resins cannot use high temperature to remove the moisture in the resin. Therefore, thermosetting phenolic resins generally exist in liquid form. The formation of solid form generally requires the use of special dehydration and reaction equipment, and the formation process of the resin is not easy to control....

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Problems solved by technology

However, the use of a large amount of solvent in the reaction process increases the environmental impact factors and the possibility of danger, and there is still a lot of water in the resin, which still has a great impact on the later use of the resin.

[0007] Other patents such as the Chinese patent with the application number CN200910023149 and the Japanese patent with the patent number JP58074709A have explained other preparation methods of thermosetting solid phenolic resins, but there are factors affecting the stability of equipment and processes.

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