Preparation method of nylon modified thermoplastic silicon phenolic resin

Abstract

The invention relates to a preparation method of nylon modified thermoplastic silicon phenolic resin, and the method comprises the following steps: firstly mixing nylon, a siloxane monomer and a phenolic compound, uniformly stirring, adding an acidic catalyst, adjusting pH to acidity, heating, reacting to obtain an intermediate containing silicon atoms or amide groups, and then reacting the intermediate with aldehyde compounds to obtain the nylon modified thermoplastic silicon phenolic resin. According to the method, raw materials have wide sources and low cost; in the process of preparing thenylon modified thermoplastic silicon phenolic resin, the relative content of phenolic hydroxyl and water is reduced, so that the thermal stability and mechanical properties of the modified phenolic resin are improved to a certain extent, and the high-performance phenolic resin with uniform molecular weight distribution, small particle size and small volatile is prepared.

Description

technical field [0001] The invention belongs to a preparation method of modified thermoplastic silicon phenolic resin; in particular, a method for preparing modified thermoplastic silicon phenolic resin by nylon. Background technique [0002] As one of the most used engineering resins, phenolic resin is the first resin discovered and industrialized in the world. Its raw materials are easy to obtain, the cost is low, the synthesis process and equipment are simple, and it has excellent mechanical strength, flame retardant, low Toxicity, low smoke and other characteristics, so it is widely used in many fields such as construction, chemical industry, machinery, refractory materials, bonding and so on. However, the heat resistance of traditional phenolic resins is affected due to the easy oxidation of phenolic hydroxyl groups and methylene groups in the molecular structure, which limits its application in certain fields, especially high-temperature fields. [0003] In order to i...

AI Technical Summary

Problems solved by technology

However, the preparation process of traditional silicon phenolic resin is complex, there are reactions such as hydrolysis self-polymerization of organosilicon monomer, phenolic self-polymerization, monomer and phenolic copolymerization, etc., and the degree of reaction polymerization is difficult to control

[0004] The present inventor has synthesized and prepared novel silicon phenolic resin (SPF) by transesterification in the early stage research, has solved the problem that the reaction process is difficult to control in the above silicon phenolic resin preparation process; Yet the prepared novel silicon phenolic resin toughness Not good, industrial production is not enough, need to further improve its toughness

Images