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Anhydrous resin bonding agent for fireproof material and preparation method thereof

A technology of anhydrous resin and refractory materials, applied in adhesive types, aldehyde/ketone condensation polymer adhesives, adhesives, etc., can solve the problem of high temperature resistance and corrosion resistance of finished bricks, main material fused magnesia Expensive, harmful to human health and other problems, to achieve the effect of long molding time, good molding process adaptability, and good compressive strength at room temperature

Active Publication Date: 2012-07-25
SHANDONG LAIWU RUNDA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the carbon composite refractory material - magnesia carbon brick is widely used in the iron and steel smelting industry. This kind of brick uses water-containing phenolic resin as the binder, which has the following disadvantages: the price of the main material fused magnesia is relatively expensive, and the resources are not abundant; the finished brick General high temperature resistance and corrosion resistance
Because tar and asphalt are prone to produce strong carcinogenic odor and smoke during the baking process, which seriously pollutes the environment and endangers human health, so it is not suitable for promotion and use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1), preparation novolac resin:

[0026] Add 600 parts of phenol and 360 parts of formaldehyde with a concentration of 37% in a reaction kettle equipped with a stirrer, thermometer, vacuum gauge, and heating and cooling devices. After starting to stir, add 12 parts of oxalic acid and 3 parts of zinc acetate for one hour. The temperature was raised to reflux, and after maintaining the reaction for 2 hours, the temperature was lowered to 60°C, and the stirring was stopped to separate the layers. After siphoning the supernatant, it was distilled at normal pressure until the temperature reached 130°C, and then dehydrated under a vacuum of 0.088MPa to 180°C, novolac resin is produced;

[0027] (2), modification treatment:

[0028] In the novolac resin obtained in step (1), dimethyl phthalate is used as the ester solvent as the solvent without hydroxyl, and 600 parts are added in total. After being kept at 100°C for one hour, the temperature is lowered to 80°C, and Isocyana...

Embodiment 2

[0032] (1), preparation novolac resin:

[0033] In the reaction kettle equipped with agitator, thermometer, vacuum gauge and heating and cooling devices, add 1600 parts of m-cresol, 1040 parts of aqueous solution of paraformaldehyde with a concentration of 37%, after starting stirring, add 1 part of phosphoric acid and 5 parts of nickel acetate, heat up to reflux within one hour, maintain the reaction for 3 hours, then cool down to 60°C, stop stirring to make layers, siphon the supernatant, distill at normal pressure until the temperature reaches 130°C, and then distill at 0.09 Dehydration to 190°C under a vacuum of MPa to generate novolak resin;

[0034] (2), modification treatment:

[0035] In the novolac resin that step (1) obtains, the solvent that does not contain hydroxyl uses dimethyl adipate as the mixture of ester solvent and acetophenone as ketone solvent, add 600 parts of dimethyl adipate and 500 Parts of acetophenone, keep warm at 120°C for 2 hours, then cool dow...

Embodiment 3

[0039] (1), preparation novolac resin:

[0040] In a reactor equipped with a stirrer, a thermometer, a vacuum gauge, and heating and cooling devices, add 900 parts of phenol, 100 parts of resorcinol, and 690 parts of formaldehyde with a concentration of 37%. After stirring, add 0.5 parts of phosphoric acid, 2 parts of oxalic acid, 3 parts of zinc acetate and 5 parts of magnesium acetate, heat up to reflux within one hour, maintain the reaction for 2 hours, then cool down to 60°C, stop stirring to make layers, siphon the supernatant, and distill under normal pressure When the temperature reaches 130°C, it is dehydrated to 180°C under a vacuum of 0.088MPa to produce novolac resin;

[0041] (2), modification treatment:

[0042] In the novolak resin that step (1) obtains, the solvent that does not contain hydroxyl uses ethylene glycol dibutyl ether as the ether solvent, adds 900 parts of ethylene glycol dibutyl ethers, and after being incubated at 130° C. for one hour, cool down ...

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Abstract

The invention discloses an anhydrous resin bonding agent for a fireproof material and a preparation method thereof. The anhydrous resin bonding agent is characterized in that after phenol and aldehyde are synthetized into phenol aldehyde linear resin under the action of an acid composite catalyst, a solvent without hydroxide radicals is added for dissolving; and isocyanate is used for modifying to prepare the anhydrous resin bonding agent. The anhydrous resin bonding agent for the fireproof material contain no water, has moderate viscosity, generate no water in the process of solidifying and is particularly suitable for manufacturing alkaline fireproof material products containing calcium, such as magnesia-calcium bricks, dolomite bricks, and the like. The alkaline fireproof material products have long storage time, no easy aquation, no generation of volumetric expansion and high product strength and effectively improve the quality of the fireproof material.

Description

technical field [0001] The invention relates to a resin binder for refractory materials, in particular to an anhydrous resin binder for refractory materials and a preparation method thereof, which is suitable for the production of furnace lining refractory materials for smelting stainless steel. Background technique [0002] With the continuous development of iron and steel smelting technology, people have higher and higher requirements for the strength and high temperature resistance of refractory products. At present, the most commonly used refractory materials are carbon composite refractory materials. One of the components is an organic binder, which occupies a very important position in carbon composite materials. big impact. [0003] At present, the carbon composite refractory material - magnesia carbon brick is widely used in the iron and steel smelting industry. This kind of brick uses water-containing phenolic resin as the binder, which has the following disadvanta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J161/14C04B35/66
Inventor 刘常玉褚宪锋李长彬吕虎吕华吕占美刘卫国
Owner SHANDONG LAIWU RUNDA NEW MATERIAL
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