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Carbon graphite material soaking special resin and preparation method thereof

A carbon graphite and resin technology, applied in the field of modified composite resin, can solve problems such as excessive content, resin leakage, sealing failure, etc., and achieve the effects of improving comprehensive performance, prolonging time, and enhancing alkali resistance and temperature resistance.

Inactive Publication Date: 2010-10-27
WUXI ZHONGQIANG ELECTRIC CARBON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both resins have defects: 1. The free phenol content of phenolic resin low-temperature volatiles is as high as 15%-16%; the moisture content reaches 18%-20%; these two harmful substances are immersed into the carbon graphite material matrix together during impregnation; Since the curing is heat and pressure curing, the two substances cannot be completely released during curing, and most of them remain in the carbon graphite material matrix. effect, the free phenol and water remaining in the semi-solid state in the material matrix leak out to the end face, causing the so-called resin leakage and sealing failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment one: a kind of preparation method of special resin impregnated with carbon graphite material of the present invention, adopts the following process steps: its formula ratio is counted by weight parts:

[0019] 1. Add 5 parts of bismaleimide BMI to 5 parts of the same amount of xylene, dissolve and stir at room temperature for 1 hour to make a mixed solution; put it into a stirring tank with temperature, speed and pressure control, stirring speed: 250 rpm / Minute;

[0020] 2. Add 66 parts of phenolic resin (2127) to the above warming solution, and mix and stir in the stirring tank for 0.5 hours, keeping the temperature between 35°C; stirring speed: 250 rpm;

[0021] 3. Add 25 parts of furan resin (furfuryl ketone) to the mixed solution in step (2), and continue to stir for 1 hour, keeping the temperature at 30°C;

[0022] 4. Put the mixed solution in step (3) into an 800-liter curing tank for curing, that is, the temperature is raised without pressurization, ...

Embodiment 2

[0023] Embodiment two: a kind of preparation method of special resin impregnated with carbon graphite material of the present invention, adopts following process step: its formula ratio is counted by weight parts:

[0024] 1. Add 6 parts of bismaleimide BMI to the same amount of xylene, dissolve and stir at room temperature for 2 hours to make a mixed solution; stirring speed: 270 rpm;

[0025] 2. Add 68 parts of phenolic resin (2127) to the above warming solution, and mix and stir in the stirring tank for 1 hour, keeping the temperature between 40°C; stirring speed: 270 rpm;

[0026] 3. Add 26 parts of furan resin (furfuryl ketone) to the mixed solution in step (2), and continue to stir for 1.5 hours, keeping the temperature at 38°C;

[0027] 4. Put the mixed solution in step (3) into the curing tank for curing, that is, heat up without pressurization, and open the vent valve; cure at room temperature for 2 hours; when the temperature is 65°C, cure for 10 hours; when the temp...

Embodiment 3

[0029] Embodiment three: a kind of preparation method of special resin impregnated with carbon graphite material of the present invention, adopts following process step: its formula ratio is counted by weight parts:

[0030] 1. Add 7 parts of bismaleimide BMI to the same amount of xylene, dissolve and stir at room temperature for 3 hours to make a mixed solution; stirring speed: 250-300 rpm;

[0031] 2. Add 70 parts of phenolic resin (2127) to the above warming solution, and mix and stir in the stirring tank for 1.5 hours, keeping the temperature between 43°C; stirring speed: 250-300 rpm;

[0032] 3. Add 27 parts of furan resin (furfuryl ketone) to the mixed solution in step (2), and continue to stir for 2 hours, keeping the temperature between 40°C;

[0033] 4. Put the mixed solution in step (3) into the curing tank for curing, that is, heat up without pressurization, and open the vent valve; cure at room temperature for 2.5 hours; when the temperature is 80°C, cure for 11 ho...

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PUM

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Abstract

The invention relates to a carbon graphite material soaking special resin and a preparation method thereof for filling remnant air holes of the roasted carbon graphite material, belonging to the technical field of modified composite resin. The method comprises the following steps: adding bimaleimide into the same dose of dimethylbenzene; dissolving and stirring at a room temperature to prepare a mixed solution; adding phenolic resin in the mixed solution, mixing and stirring; and adding furan resin to continue stirring and adding to a curing tank to be cured into a soaking special resin. The carbon graphite material soaking special resin enhances the alkali resistance and the temperature toleration than the prior single phenolic resin, decreases low-temperature volatile and moisture contained in the prior phenolic resin, improves the comprehensive performance, eliminates sealing failure accidents caused by resin leakage, prolongs the time of a low-temperature region and can discharge more than 95 percent of low-temperature volatile and moisture.

Description

technical field [0001] The invention relates to a special resin for impregnating carbon and graphite materials and a preparation method thereof, in particular to filling the pores left after roasting for carbon and graphite materials, and belongs to the technical field of modified composite resins. Background technique [0002] At present, there is no special impregnation resin for carbon graphite materials used in machinery in my country. Facts have proved that the impregnation of carbon graphite materials has special requirements for resins. There are two types of resins widely used in the production of carbon graphite materials. Phenolic resins have excellent acid resistance. But the alkali resistance is poor. Furan resin has good acid and alkali resistance, and has become the resin with the largest amount of carbon graphite materials. Now the resins used in the carbon graphite industry are used by resin factories for the binder industry. Both resins have defects: 1. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L65/00C08L61/06C08K5/20
Inventor 吴强
Owner WUXI ZHONGQIANG ELECTRIC CARBON CO LTD