Preparation method of room-temperature regenerated phenolic resin and recycling technology and application thereof

Abstract

The invention relates to a preparation method of room-temperature regenerated phenolic resin and a recycling technology and application thereof. The preparation method comprises the following steps of according to parts by mass, melting and blending 100 parts of thermoplastic phenolic resin and 18.4 to 55 parts of boric acid compound at the temperature of 60 to 100 DEG C, so as to obtain boron-containing thermoplastic phenolic resin; or, dissolving 100 parts of thermoplastic phenolic resin and 20 to 50 parts of boric acid compound into an organic solvent with low boiling point at the temperature of 40 to 60 DEG C, so as to obtain the boron-containing thermoplastic phenolic resin; curing, so as to obtain the room-temperature regenerated phenolic resin. The preparation method has the advantages that the preparation technology of the resin is simple; the resin is dissolved into the mixing solvent of ethyl alcohol and water at room temperature, so that the resin can be recycled; the resin can be used for preparing the recyclable fiber reinforced boron-containing thermoplastic phenolic resin-based composite material. The prepared boron-containing thermoplastic phenolic resin has the advantages that the function of arylboronic acid ester structure promoting the heat-resistant property of the thermoplastic phenolic resin is fully realized, and the technology of the resin and the mechanical property of the composite material can be simultaneously realized.

Description

technical field [0001] The invention relates to a preparation method of a room-temperature renewable phenolic resin, a recovery process and application thereof. Background technique [0002] Phenolic resin, as one of the important thermosetting resin varieties, has a history of more than one hundred years so far. Due to the availability of raw materials, low cost, and good mechanical properties, heat resistance, and electrical properties, phenolic resins are widely used in the field of advanced composite materials, for example, for processing into resin-based composites with good ablation resistance and carbon / carbon composite. As we all know, only when phenolic resin is cured to form a three-dimensional cross-linked structure can it become a material with practical value. However, cured phenolic resins are quite stable, both to heat and to media (including common inorganic media such as acidic, alkaline, and neutral water, and various organic solvents). This valuable p...

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Problems solved by technology

[0004] It can be seen that although the traditional recovery method has solved the difficult problem of PR recovery to a certain extent, it is still unable to realize the resolidification and recycling of the recovered resin product, and the mixture of phenol and its derivatives is usually obtained, and the recovery cost is relatively high. High, while the recovery conditions are relatively harsh (need high temperature or catalyst)

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