CN102924835A - High-strength high-inflaming-retardant rubber sheath material of mine cable and preparation process - Google Patents

Abstract

The invention discloses a high-strength high-inflaming-retardant rubber sheath material of a mine cable and a preparation process. The prescription of the material includes 38% of chlorinated polyethylene, 4% of magnesium oxide, 1.2% of dibasic lead sulfate, 1% of tribasic lead sulfate, 0.8% of lead stearate, 3.3% of dioctyl phthalate, 4% of chlorcosane, 17% of carbon black, 4% of antimonous oxide, 11% of magnesium hydrate, 3.5% of tri(2-chloroethyl)phosphate, 4% of precipitation white carbon black, 6% of calcium carbonate, 0.3% of surfactant gama-thiopropyl triethoxy silane, 1% of curing agent dicumyl peroxide and 0.9% of cocuring agent tri-allyl cyanuric acid ester. Inflaming-retarding performance of the rubber sheath material is improved by synergistic effect of fire retardant antimonous oxide, chlorinated paraffin, magnesium hydrate and tri(2-chloroethyl)phosphate, physical mechanical performance of the rubber sheath material is improved by adding reinforcing agent carbon black and the precipitation white carbon black. The material is simple in preparation process and strong in operability.

Description

High-intensity high combustion mining cable rubber sheath material and preparation technology

Original applying number 201110299112.8, on 09 29th, 2011 applying date, denomination of invention is: fire-retardant anti-tear mining cable rubber sheath material and preparation method.

Technical field

The present invention relates to the eraser sheath material for the mineral products cable, also relate to this material preparation technique.

Background technology

Development along with open coal mine and Underground Mine electric coal winning machine tool, performance requriements to mine cable is also more strict, not only require the insulation layer of cable that excellent electric property is arranged, require simultaneously sheath material to gather around good physical and mechanical properties, such as tensile strength, elongation at break height; Furthermore, inevitably have methane gas in the mine, have combustion explosion danger, mining need be laid large numbers of various cables in the well electric energy, control signal and monitoring are provided, and requires cable sheath to have difficult combustion and flame-retarding power energy not.

Summary of the invention

First purpose of the present invention provides physical and mechanical properties and the good high-intensity high combustion mining cable rubber sheath material of flame retardant properties, and tensile strength is greater than 13.5MPa, elongation at break has better physical and mechanical properties greater than 360%, and oxygen index is greater than 40;

Second purpose of the present invention provides above-mentioned mining cable rubber sheath material preparation technique.

For achieving the above object, the technical solution used in the present invention is: be used for the eraser sheath material of mineral products cable, its material component and content by weight percentage are:

Chlorinatedpolyethylene 38%,

Magnesium oxide 4%,

Second base lead sulfate 1.2%,

Lead sulfate tribasic 1%,

Lead stearate 0.8%,

Dioctyl phthalate (DOP) 3.3%,

Clorafin 4%,

Carbon black 17%,

Antimonous oxide 4%,

Magnesium hydroxide 11%,

Trichloroethyl phosphate 3.5%,

Precipitated silica 4%,

Calcium carbonate 6%,

Tensio-active agent γ-mercaptopropyltriethoxysilane 0.3%,

Vulcanizing agent dicumyl peroxide 1%,

Cocuring agent iso-cyanuric acid triallyl ester 0.9%.

Above-mentioned eraser sheath material preparation technique for the mineral products cable may further comprise the steps:

Step 1. with the described chlorinatedpolyethylene 38% 2min ~ 3min that in 70 ℃ ~ 80 ℃ Banbury mixeies, plasticates;

Step 2. in described Banbury mixer, add again the described carbon black 17% of high abrasion, described second base lead sulfate 1.2%, described lead sulfate tribasic 1%, described lead stearate 0.8%, described magnesium oxide 4%, described trichloroethyl phosphate 3.5%, described antimonous oxide 4%, described calcium carbonate 6%, mixing 2min ~ 3min;

Step 3. last described dioctyl phthalate (DOP) 3.3%, described clorafin 4%, described magnesium hydroxide 11%, described precipitated silica 4%, the described tensio-active agent γ-mercaptopropyltriethoxysilane 0.3% of adding in described Banbury mixer, mixing 3min ~ 4min, form glue stuff compounding, this glue stuff compounding is discharged from described Banbury mixer when temperature reaches 90 ℃ ~ 100 ℃;

Step 4. the described glue stuff compounding of discharge thin-pass 1 ~ 2 time in mill, and come backswing glue 2 ~ 3 times, and then roll at tri-roll press machine, do not open the bar slice;

Step 5. the glue stuff compounding room temperature after the calendering is deposited 8h, then put into mixer mixing, melting temperature adds described vulcanizing agent dicumyl peroxide 1%, described cocuring agent iso-cyanuric acid triallyl ester 0.9% when reaching 100 ℃, follow mixing 1min, then discharges glue stuff compounding;

Step 6. this glue stuff compounding thin-pass 1 ~ 2 time in mill, and come backswing glue 2 ~ 3 times, then open the bar slice at tri-roll press machine, the rubber page or leaf of output is through the cooling roller cooling, cross the talcum powder case after, namely make finished product.

Because the utilization of technique scheme, the present invention compared with prior art has following advantages:

The present invention is in high-intensity high combustion mining cable rubber sheath material, make base-material with chlorinatedpolyethylene, by adding the fire retardant antimonous oxide, clorafin and magnesium hydroxide, trichloroethyl phosphate acts synergistically to improve the flame retardant properties of rubber sheath material, improve the physical and mechanical properties of rubber sheath material by adding strengthening agent carbon black and precipitated silica, through experiment confirm, eraser sheath tensile strength of material of the present invention is greater than 13.5MPa, elongation at break is greater than 360%, has better physical and mechanical properties, oxygen index is greater than 40, have preferably flame retardant properties, and preparation technology is simple, workable.

Embodiment

Below further set forth the present invention.

At the eraser sheath material that is used for the mineral products cable, make base-material with chlorinatedpolyethylene, by adding the fire retardant antimonous oxide, clorafin and magnesium hydroxide, trichloroethyl phosphate acts synergistically to improve the flame retardant properties of rubber sheath material, specifically, antimonous oxide and clorafin carry out chemical reaction, generate butter of antimony, butter of antimony can be as the free radical catcher in gaseous combustion district, can effectively pounce on and catch the free radical that polymer combustion produces, play fire retardation, and absorb magnesium hydroxide at trichloroethyl phosphate and decompose the phosphoric acid that the large quantity of moisture that discharges is heated and generates, metaphosphoric acid, these aerobic acids such as poly-metaphosphoric acid impel chlorinatedpolyethylene dehydration carbonization to form liquid film charcoal layer can be with oxygen and flammable volatile matter, heat separates with inner superpolymer matrix, weakens or interrupts burning.The water vapor that magnesium hydroxide decompose to produce is easier to be discharged and will absorb certain heat, reduced the temperature of system, the oxide compound charcoal layer that decomposes generation also can cover the surface of material equably, thereby heat and polymer materials are separated, improved the filler fire retardation, improve the physical and mechanical properties of rubber sheath material in the sheath material by adding strengthening agent carbon black and precipitated silica, and magnesium hydroxide above-mentioned also there is certain strengthening action.In the other materials component of sheath material, magnesium oxide mainly absorbs the hydrogen chloride gas that produces in processing and the sulfidation except certain flame retardant effect is arranged, or cheap and good-quality thermo-stabilizer.(should not use acid Synergist S-421 95 in the rubber compounding, prevent that acid Synergist S-421 95 from affecting the sulfuration of chlorinated polyethylene rubber on the destruction of superoxide.Itself has alkalescence magnesium oxide, is again the important thermo-stabilizer of chlorinated polyethylene rubber).Calcium carbonate also plays the absorbing hydrogen chloride effect, the hydrogenchloride that assurance decomposites is thoroughly removed, calcium carbonate is also as filler, reduce material cost, second base lead sulfate, lead sulfate tribasic, lead stearate is as stablizer, stop the chlorinatedpolyethylene decomposes to produce hydrogenchloride, dioctyl phthalate (DOP) is convenient to the materials processing moulding as softening agent, and tensio-active agent can improve the consistency between the organic substance and inorganic substance in the material component, so that each material component is mixing full and uniform, improve the physical and mechanical properties of goods, adopt the white carbon black of precipitator method preparation, particle diameter is large, be uniformly dispersed easily, guarantee melting effect, vulcanizing agent is so that material generation vulcanization crosslinking makes macromolecular material change tridimensional network into from linearity, improve machinery and the physicals of material, cocuring agent can increase cross-linking efficiency and thermotolerance.

Specific embodiment:

38 kilograms of chlorinatedpolyethylenees, 4 kilograms in magnesium oxide, 1.2 kilograms of second base lead sulfates, 1 kilogram of lead sulfate tribasic, 0.8 kilogram of lead stearate, 3.3 kilograms of dioctyl phthalate (DOP)s, 4 kilograms of clorafins, 17 kilograms of high wear-resistant carbon blacks, 4 kilograms of antimonous oxides, 11 kilograms of magnesium hydroxides, 3.5 kilograms of trichloroethyl phosphates, 4 kilograms of precipitated silicas, 6 kilograms in calcium carbonate, 0.3 kilogram of tensio-active agent γ-mercaptopropyltriethoxysilane, 1 kilogram of vulcanizing agent dicumyl peroxide, 0.9 kilogram of cocuring agent iso-cyanuric acid triallyl ester.

Preparation technology:

Step 1. with the described chlorinatedpolyethylene 38% 2min ~ 3min that in 70 ℃ ~ 80 ℃ Banbury mixeies, plasticates;

Step 2. in described Banbury mixer, add again the described carbon black 17% of high abrasion, described second base lead sulfate 1.2%, described lead sulfate tribasic 1%, described lead stearate 0.8%, described magnesium oxide 4%, described trichloroethyl phosphate 3.5%, described antimonous oxide 4%, described calcium carbonate 6%, mixing 2min ~ 3min;

Step 3. last described dioctyl phthalate (DOP) 3.3%, described clorafin 4%, described magnesium hydroxide 11%, described precipitated silica 4%, the described tensio-active agent γ-mercaptopropyltriethoxysilane 0.3% of adding in described Banbury mixer, mixing 3min ~ 4min, form glue stuff compounding, this glue stuff compounding is discharged from described Banbury mixer when temperature reaches 90 ℃ ~ 100 ℃;

Step 4. the described glue stuff compounding of discharge thin-pass 1 ~ 2 time in mill, and come backswing glue 2 ~ 3 times, and then roll at tri-roll press machine, do not open the bar slice;

Step 5. the glue stuff compounding room temperature after the calendering is deposited 8h, then put into mixer mixing, melting temperature adds described vulcanizing agent dicumyl peroxide 1%, described cocuring agent iso-cyanuric acid triallyl ester 0.9% when reaching 100 ℃, follow mixing 1min, then discharges glue stuff compounding;

Step 6. this glue stuff compounding thin-pass 1 ~ 2 time in mill, and come backswing glue 2 ~ 3 times, then open the bar slice at tri-roll press machine, the rubber page or leaf of output is through the cooling roller cooling, cross the talcum powder case after, namely make finished product.

The high-intensity high combustion mining cable rubber sheath material of this example preparation, the detection data of performance are as follows:

Aging condition: 80 ± 2 ℃ * 240 hours

To sum up, high-intensity high combustion mining cable rubber sheath tensile strength of material of the present invention reaches more than the 13.7MPa, and elongation at break reaches more than 370%, have better physical and mechanical properties, oxygen index reaches 43, has preferably flame retardant properties, and preparation technology is simple, and is workable.

Above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present invention and according to this enforcement, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.

Claims (2)

1. a high-intensity high fires the mining cable rubber sheath material, it is characterized in that: its material component and content by weight percentage are:

Chlorinatedpolyethylene 38%,

Magnesium oxide 4%,

Second base lead sulfate 1.2%,

Lead sulfate tribasic 1%,

Lead stearate 0.8%,

Dioctyl phthalate (DOP) 3.3%,

Clorafin 4%,

Carbon black 17%,

Antimonous oxide 4%,

Magnesium hydroxide 11%,

Trichloroethyl phosphate 3.5%,

Precipitated silica 4%,

Calcium carbonate 6%,

Tensio-active agent γ-mercaptopropyltriethoxysilane 0.3%,

Vulcanizing agent dicumyl peroxide 1%,

Cocuring agent iso-cyanuric acid triallyl ester 0.9%.

2. mining cable rubber sheath material preparation technique as claimed in claim 1 is characterized in that: may further comprise the steps:

Step 1. with the described chlorinatedpolyethylene 38% 2min ~ 3min that in 70 ℃ ~ 80 ℃ Banbury mixeies, plasticates;

Step 2. in described Banbury mixer, add again the described carbon black 17% of high abrasion, described second base lead sulfate 1.2%, described lead sulfate tribasic 1%, described lead stearate 0.8%, described magnesium oxide 4%, described trichloroethyl phosphate 3.5%, described antimonous oxide 4%, described calcium carbonate 6%, mixing 2min ~ 3min;

Step 3. last described dioctyl phthalate (DOP) 3.3%, described clorafin 4%, described magnesium hydroxide 11%, described precipitated silica 4%, the described tensio-active agent γ-mercaptopropyltriethoxysilane 0.3% of adding in described Banbury mixer, mixing 3min ~ 4min, form glue stuff compounding, this glue stuff compounding is discharged from described Banbury mixer when temperature reaches 90 ℃ ~ 100 ℃;

Step 4. the described glue stuff compounding of discharge thin-pass 1 ~ 2 time in mill, and come backswing glue 2 ~ 3 times, and then roll at tri-roll press machine, do not open the bar slice;

Step 5. the glue stuff compounding room temperature after the calendering is deposited 8h, then put into mixer mixing, melting temperature adds described vulcanizing agent dicumyl peroxide 1%, described cocuring agent iso-cyanuric acid triallyl ester 0.9% when reaching 100 ℃, follow mixing 1min, then discharges glue stuff compounding;

Step 6. this glue stuff compounding thin-pass 1 ~ 2 time in mill, and come backswing glue 2 ~ 3 times, then open the bar slice at tri-roll press machine, the rubber page or leaf of output is through the cooling roller cooling, cross the talcum powder case after, namely make finished product.