Acid/alkali-resistant insulating rubber material and preparation method for same

A technology of insulating rubber and acid and alkali resistance, applied in the field of rubber materials, can solve the problems of high price, depolymerization, rubber does not have other properties, etc., and achieves the effect of easy operation and simple preparation process

Active Publication Date: 2015-11-25
三丰盈新材料(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when ordinary rubber materials encounter working environments with acid-base or salt solutions, they are often corroded due to frequent contact with chemicals such as acid-base or salt, resulting in rubber swelling, rubber molecule breakage, and depolymerization, which in turn increases its mechanical strength. and physical properties are significantly reduced, or even completely lose their due effect, which will directly affect production safety and personal safety; in addition, in some specific occasions, the insulating properties of rubber are also a limiting factor for rubber applications
In the prior art, although the acid and alkali resistance of nitrile rubber and fluorine rubber are relatively strong, the price is relatively expensive.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add 65 parts of reclaimed rubber and 20 parts of fluorine rubber to an internal mixer and masticate at a temperature of 60°C for 10 minutes to obtain mixture A, which is ready for use;

[0030] (2) Mix 4 parts of magnesium oxide, 2 parts of zinc oxide, 25 parts of nano calcium silicate, 0.2 parts of vanadium acetylacetonate, 8 parts of 2-dibenzofuranol, 4 parts of 4-bromo-2-furan valeraldehyde, and furfuryl alcohol Put 18 parts of resin and 8 parts of polyimide fiber into a reaction kettle at a temperature of 120°C and stir evenly to obtain mixture B; wherein, the speed is 250r / min and the time is 30min;

[0031] (3) Mix the mixture A described in step (1) and the mixture B described in step (2) to obtain mixture C; the mixing speed is 35 rpm, the filling factor is 0.45, the feeding temperature is 55°C, and the discharge temperature It is 110℃, and the time is 5min;

[0032] (4) The mixture C described in step (3) is extruded using a twin-screw extruder at a speed of 70 r...

Embodiment 2

[0034] (1) Add 80 parts of reclaimed rubber and 50 parts of fluorine rubber to an internal mixer and masticate for 15 minutes at a temperature of 65°C to obtain mixture A, which is ready for use;

[0035] (2) Combine 9 parts of magnesium oxide, 6 parts of zinc oxide, 40 parts of nano calcium silicate, 0.8 parts of acetylacetone, 15 parts of 2-dibenzofuranol, 12 parts of 4-bromo-2-furan valeraldehyde, and furfuryl alcohol resin 30 parts and 15 parts of polyimide fiber are put into a reaction kettle at 170℃ and mechanically stirred to obtain mixture B; wherein, the speed is 400r / min and the time is 60min;

[0036] (3) Mix the mixture A described in step (1) and the mixture B described in step (2) to obtain mixture C; the mixing speed is 45 rpm, the filling factor is 0.6, the feeding temperature is 75 °C, and the discharge temperature It is 120℃, and the time is 12min;

[0037] (4) The mixture C described in step (3) is extruded using a twin-screw extruder at a speed of 80 rpm at a tem...

Embodiment 3

[0039] (1) Add 70 parts of reclaimed rubber and 30 parts of fluorine rubber to an internal mixer and masticate at a temperature of 65°C for 15 minutes to obtain mixture A, which is ready for use;

[0040] (2) Combine 5 parts of magnesium oxide, 3 parts of zinc oxide, 30 parts of nano calcium silicate, 0.4 parts of triphenylphosphine, 10 parts of 2-dibenzofuranol, 7 parts of 4-bromo-2-furan valeraldehyde, 20 parts of furfuryl alcohol resin and 10 parts of polyimide fiber are put into a reaction kettle at a temperature of 150℃ and mechanically stirred to obtain mixture B; wherein, the speed is 350r / min and the time is 40min;

[0041] (3) Mix the mixture A described in step (1) and the mixture B described in step (2) to obtain mixture C; the mixing speed is 40 rpm, the filling factor is 0.5, the feeding temperature is 60°C, and the discharge temperature It is 110℃, and the time is 8min;

[0042] (4) The mixture C described in step (3) is extruded using a twin-screw extruder at a speed ...

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PUM

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Abstract

The invention discloses an acid/alkali-resistant insulating rubber material, which comprises 65 to 80 parts by weight of reclaimed rubber, 20 to 50 parts by weight of fluororubber, 4 to 9 parts by weight of magnesium oxide, 2 to 6 parts by weight of zinc oxide, 25 to 40 parts by weight of nanometer calcium silicate, 0.2 to 0.8 part by weight of an accelerator, 8 to 15 parts by weight of 2-dibenzofuranol, 4 to 12 parts by weight of 4-bromo-2-furanpentanal, 18 to 30 parts by weight of furfuryl alcohol resin and 8 to 15 parts by weight of polyimide fibers. A preparation process comprises the following steps of adding the reclaimed rubber and the fluororubber into an internal mixer for internal mixing; loading the magnesium oxide, the zinc oxide, the nanometer calcium silicate, the accelerator, the 2-dibenzofuranol, the 4-bromo-2-furanpentanal, the furfuryl alcohol resin and the polyimide fibers into a reaction kettle at temperature of 120 to 170 DEG C for mechanical stirring; mixing mixture A and mixture B to obtain mixture C; performing extrusion treatment and natural cooling on mixture C to obtain the rubber material with high acid/alkali resistance and insulating property.

Description

technical field [0001] The invention belongs to the field of rubber materials, and in particular relates to an acid and alkali resistant insulating rubber material and a preparation method thereof. Background technique [0002] At present, rubber products are used in all aspects of social life, such as various rubber production equipment or rubber parts in heavy industries such as mining, transportation, construction, machinery, electronics, and emerging industries. However, when ordinary rubber materials encounter working environments with acid-base or salt solutions, they are often corroded due to frequent contact with chemicals such as acid-base or salt, resulting in rubber swelling, rubber molecule breakage, and depolymerization, which in turn increases its mechanical strength. And physical properties are significantly reduced, or even completely lose their due effect, which will directly affect production safety and personal safety; in addition, in some specific occasio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L17/00C08L27/12C08L79/08C08L71/14C08K13/02C08K3/22C08K3/34C08K5/1535
Inventor 费根华
Owner 三丰盈新材料(江苏)有限公司
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