Temperature-resistant water-based phenolic resin and preparation method thereof

Abstract

The invention relates to a temperature-resistant water-based phenolic resin and a preparation method thereof, and the preparation method comprises the following steps: (1) stirring and heating preheated molten phenol, and synchronously adding part of a catalyst; (2) heating and adding the catalyst, keeping the temperature, dropwise adding a part of formaldehyde, heating the mixture, keeping the temperature, and adding the rest of catalyst and the rest of formaldehyde; and (3) after the heating and heat insulation reaction, adding a modifier, synchronously raising the temperature, performing heat insulation reaction and stopping the reaction, and after the temperature is reduced, carrying out reduced pressure dehydration under stirring to obtain a target product. Compared with the prior art, the synergistic effect of boric acid and other modifiers is utilized for composite modification, the defect of single modification is overcome, a B-O bond, a P-O bond, a Si-O bond and a Mo-O bond are introduced into common water-based phenolic resin, and thereby the water-based phenolic resin with higher temperature resistance is prepared through infrared spectrum and thermogravimetric comparison.

Description

technical field [0001] The invention relates to a thermosetting phenolic resin, in particular to a temperature-resistant water-based phenolic resin and a preparation method thereof. Background technique [0002] As early as 1872, the West German chemist Bayer (A. Baeyer) first discovered that phenol and aldehyde can be condensed in the presence of acid to obtain crystalline products and amorphous, brown-red, unhandled resinous products. The resinous product has not been studied. After entering the 20th century, chemists from various countries became more and more interested in the condensation reaction of phenol and formaldehyde. Until 1905 to 1907, the American scientist Baekeland (the founder of phenolic resin) carried out systematic research on phenolic resin. After more than 100 years of development, the synthesis methods of phenolic resins have been further matured and diversified, among which thermosetting phenolic resins are an outstanding resin system. Thermosettin...

AI Technical Summary

Problems solved by technology

These advantages enable the rapid development of phenolic resins. Since the 21st century, the development of phenolic resins has been in a stable development period. Due to the substantial increase in demand for phenolic resins, higher requirements have been placed on the performance of phenolic resins. However, traditional water-based phenolic resins The resin has poor temperature resistance, is easy to self-polymerize, and has low stability, which cannot meet the growing needs of people and hinder its further development.

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