A kind of high moisturizing phenolic resin and preparation method thereof

Abstract

The invention belongs to the technical field of preparation of phenolic resin, and specifically discloses a high moisturizing phenolic resin and a preparation method thereof. That is, start the stirring mechanism, pump the preheated phenol into the reaction kettle in a vacuum state, pump water into the reaction kettle in proportion, add a catalyst, heat up, and when the temperature reaches 58 ℃, add solid formaldehyde in batches, After adding solid formaldehyde, slowly heat up to 59°C, keep the temperature at 58-59°C for 240 minutes, cool down to 50°C, add sulfuric acid for neutralization, pH reaches 7-7.5, filter the resin through a plate-and-frame filter, and filter out The impurities are suspended in the resin, and then the resin enters the dehydration kettle for vacuum dehydration, and the viscosity is adjusted to 5-8pa by adding a solvent, then a silane coupling agent is added, and the material is discharged to obtain a phenolic resin with a methylol content of 38-45%. The iron groove material produced by using the phenolic resin is placed for 20-30 days, and the volume density of the compact sample block is 2.8-3g / cm ‑3 During the period, the production and supply cycle and the construction cycle of the iron ditch of the steel plant were extended.

Description

technical field [0001] The invention belongs to the technical field of phenolic resins, and discloses a high moisturizing phenolic resin for preparing iron groove materials and a preparation method thereof. Background technique [0002] The iron trench material is the refractory material used in the lining or repair of the blast furnace tapping trench. The iron trench lining iron trench material is composed of refractory castables and refractory ramming materials, and the iron trench repairing iron trench material is composed of refractory ramming materials. They are all amorphous refractories. The iron groove material is made by using fused corundum, silicon carbide and fixed carbon as refractory aggregate, adding phenolic resin and performance modifier through mixing. [0003] As a refractory product, iron groove material usually takes a certain amount of time from production to lining or repairing iron hook construction and use, that is, it will generally be delayed for ...

AI Technical Summary

Problems solved by technology

What determines the moisturizing performance of phenolic resin is its methylol content. The methylol content of the currently used phenolic resin is 22-32%. Sample block, the body density is 2.8-3g / cm -3 ; If the storage time exceeds this period, it will be difficult to form the sample block, and the body density will be lower than 2.8g / cm -3 , its performance will be severely degraded and difficult to meet the needs of use

However, due to the long production and supply cycle of the refractory material factory and the long construction period of the iron trench in the steel plant, the iron trench material prepared by the currently used phenolic resin can no longer meet the requirements of use.