Organic/inorganic hybrid modified phenolic resin for aluminum-carbon refractories and preparation method thereof

A technology of aluminum-carbon refractory material and phenolic resin, which is applied in the field of organic/inorganic hybrid modified phenolic resin for aluminum-carbon refractory material and its preparation, which can solve the problem of high surface energy, increased production cost, and large specific surface area of ​​nano-silica and other problems, to achieve the effect of improving the bonding strength at medium temperature, improving the reaction functionality and reducing the production cost

Inactive Publication Date: 2016-04-27
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: (1) Nano-silica has a large specific surface area, high surface energy and is prone to agglomeration
(2) Nano-silica as a filler cannot effectively improve the molecular structure of phenolic resin
The disadvantages of this method are: (1) The compatibility of phenolic resin and metal oxide sol is not high, and they cannot be mixed uniformly effectively
(2) The price of the metal precursor sol is expensive, which increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An organic / inorganic hybrid modified phenolic resin for aluminum-carbon refractory materials and a preparation method thereof. The raw materials and contents of the organic / inorganic hybrid modified phenolic resin for the aluminum-carbon refractory are: calcium lignosulfonate is 4~6wt%; phenol is 34~36wt%; the formaldehyde solution with a concentration of 37wt% is 55 ~65wt%.

[0022] According to the above raw materials and their contents:

[0023] First, under the condition of 50~60°C, put the lignin and phenol in the reactor and stir evenly; ~0.7h.

[0024] Then, under the condition of 70-90°C, add formaldehyde solution with a concentration of 37wt% into the reaction kettle, and stir for 0.2-0.6h.

[0025] Then, at 80-100°C, add 2-4wt% silica sol of the raw material into the reaction kettle, and stir for 1-3h; dehydrate under reduced pressure at 60-70°C to obtain an organic / Inorganic hybrid modified phenolic resin.

[0026] The organic / inorganic hybrid modified ...

Embodiment 2

[0029] An organic / inorganic hybrid modified phenolic resin for aluminum-carbon refractory materials and a preparation method thereof. The raw materials and contents of the organic / inorganic hybrid modified phenolic resin for aluminum-carbon refractory materials are: calcium lignosulfonate is 6~8wt%; phenol is 32~34wt%; concentration is 37wt% formaldehyde solution is 55 ~65wt%.

[0030] According to the above raw materials and their contents:

[0031] First, under the condition of 50~60°C, put the lignin and phenol in the reactor and stir evenly; ~0.7h.

[0032] Then, under the condition of 70-90°C, add formaldehyde solution with a concentration of 37wt% into the reaction kettle, and stir for 0.2-0.6h.

[0033] Then, at 80-100°C, add 2-4wt% silica sol of the raw material into the reaction kettle, and stir for 1-3h; dehydrate under reduced pressure at 60-70°C to obtain an organic / Inorganic hybrid modified phenolic resin.

[0034] The organic / inorganic hybrid modified pheno...

Embodiment 3

[0037] An organic / inorganic hybrid modified phenolic resin for aluminum-carbon refractory materials and a preparation method thereof. The raw materials and contents of the organic / inorganic hybrid modified phenolic resin for aluminum-carbon refractory materials are: calcium lignosulfonate is 8~10wt%; phenol is 30~32wt%; concentration is 37wt% formaldehyde solution is 55 ~65wt%.

[0038] According to the above raw materials and their contents:

[0039] First, under the condition of 50~60°C, put the lignin and phenol in the reactor and stir evenly; ~0.7h.

[0040] Then, under the condition of 70-90°C, add formaldehyde solution with a concentration of 37wt% into the reaction kettle, and stir for 0.2-0.6h.

[0041] Then, at 80-100°C, add 2-4wt% silica sol of the raw material into the reaction kettle, and stir for 1-3h; dehydrate under reduced pressure at 60-70°C to obtain an organic / Inorganic hybrid modified phenolic resin.

[0042] The organic / inorganic hybrid modified phen...

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Abstract

The invention relates to an organic / inorganic hybridization-modified phenolic resin for an aluminum carbon refractory material and a preparation method thereof. According to the technical scheme, the organic / inorganic hybridization-modified phenolic resin is prepared from the following raw materials: 4-10wt% of lignin, 30-36wt% of phenol and 55-65wt% of a formaldehyde solution of which the concentration is 37wt% and the preparation method comprises the following steps of adding lignin and phenol in the percentage by weight into a reaction vessel at 50-60 DEG C and uniformly stirring; at 70-90 DEG C, adding sodium hydroxide which accounts for 1.5-2.5wt% of the raw material to the reaction kettle and stirring for 0.4-0.7 hour; at 70-90 DEG C, adding the formaldehyde solution to the reaction kettle and stirring for 0.2-0.6 hour; finally adding silica sol which accounts for 2-8wt% of the raw material to the reaction vessel at 80-100 DEG C, stirring for 1-3 hours and carrying out pressure-reduced dehydration at 60-70 DEG C to obtain the organic / inorganic hybridization-modified phenolic resin for the aluminum carbon refractory material. The preparation method disclosed by the invention has the characteristics of simple production process and low production cost; and as a binder, the prepared product can significantly improve the medium-and-low-temperature bonding strength of the alumina carbon refractory material.

Description

technical field [0001] The invention belongs to the technical field of modified phenolic resin for refractory materials. Specifically relates to an organic / inorganic hybrid modified phenolic resin for aluminum-carbon refractory materials and a preparation method thereof. Background technique [0002] At present, phenolic resin is widely used as a binder in aluminum-carbon refractory materials. Compared with tar pitch binder, phenolic resin has the advantages of thermohardness, high drying strength and low environmental pollution. However, since phenolic resin is an organic polymer compound with few branches, The degree of wetting to inorganic materials is low, and the network structure formed after curing is not dense enough, so that the aluminum-carbon refractory material combined with phenolic resin has the problem of insufficient room temperature strength, and the bonding strength is low due to the cracking of phenolic resin in the middle temperature stage. [0003] At p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28C08G8/10C08K3/36C04B35/66
Inventor 赵雷王富成方伟梁峰陈辉陈欢杜星叶林峰王鑫
Owner WUHAN UNIV OF SCI & TECH
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