CN109111645A - A kind of flame retardant rubber composition and composite flame-retardant agent - Google Patents
A kind of flame retardant rubber composition and composite flame-retardant agent Download PDFInfo
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- CN109111645A CN109111645A CN201810991410.5A CN201810991410A CN109111645A CN 109111645 A CN109111645 A CN 109111645A CN 201810991410 A CN201810991410 A CN 201810991410A CN 109111645 A CN109111645 A CN 109111645A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a kind of flame retardant rubber composition and composite flame-retardant agent, which includes 20-40 parts of neoprenes, 30-50 parts of EP rubbers, 15-25 parts of butadiene rubbers, 20-30 parts of nitrile rubbers, 2-4 parts of natural rubbers, 10-20 parts of epoxy resin, 0.5-1 parts of sulphur, 3-4 parts of zinc oxide, 3-5 parts of stearic acid, 4-10 parts of naphthenic oils, 1-2 parts of silane coupling agents, 30-40 parts of fillers and 30-40 parts of fire retardants；The filler is made of the high wear-resistant carbon black that mass ratio is 1:2-3 with barium sulfate；The fire retardant is made of the modified magnesium hydroxide that mass ratio is 1:1-5 with modified aluminium hydroxide；The modified magnesium hydroxide is ground by the magnesium hydroxide that mass ratio is 10:2-5 with stearic acid；The modified aluminium hydroxide is ground by the aluminium hydroxide that mass ratio is 10:1-3 with silane coupling agent.Flame retardant rubber of the invention has excellent mechanical property and flame retardant effect.
Description
Technical field
The present invention relates to field of rubber technology, in particular to a kind of flame retardant rubber and its fire retardant used.
Background technique
Rubber is organic combustible material, harm safety, therefore such as mine rubber conveyer belt and the various rubber products of car and boat,
It is required to flame retardancy and flame retardant property, the rubber of anti-flammability has: neoprene, chlorosulfonated polyethylene, polyvinyl chloride and silicon
Rubber etc..In addition, addition fire retardant be improve rubber flame retardancy method, fire retardant be added to by mechanical mix techniques it is poly-
It closes in object, makes polymer that there is anti-flammability, additive flame retardant mainly has organic fire-retardant and inorganic fire retardants, halogen system at present
Fire retardant (organic chloride and organic bromide) and non-halogen fire retardant.Organic fire-retardant is with bromine system, phosphorus nitrogen system, nitrogen system and red
Phosphorus and compound are some fire retardants of representative, and inorganic fire retardants is mainly antimony oxide, magnesium hydroxide, aluminium hydroxide, silicon
The flame-retardant systems such as system.
Magnesium hydroxide is a kind of novel fire retardant researched and developed in recent years, but in rubbery system, due to magnesium hydroxide
Powder surface contains a large amount of hydroxyl, makes it have stronger polarity and hydrophily, easily formation aggregate, polar fire-retardant in this way
Compatibility and processing fluidity between agent and non-polar polymeric material are deteriorated, therefore how magnesium hydroxide is in rubber bodies in recent years
System obtains dispersing to be research hotspot well, in such as " surface modifier of flame retardant of magnesium hydroxide and application study " article, benefit
Magnesium hydroxide is modified with silane coupling agent and titanate coupling agent, hydrogen-oxygen can be improved well by obtaining silane coupling agent
Change magnesium, disperses it in rubbery system, obtain flame retardant effect well.Chinese patent 201510891183.5 is provided with hard
The polar method of resin acid modified magnesium hydroxide.But modified magnesium hydroxide needs further compatible with high molecular material, rubber at present
Flame retardant property and the mechanical property needs of glue further increase.
Summary of the invention
Goal of the invention: the present invention provides a kind of flame retardant rubber composition, the rubber excellent in mechanical performance.The present invention also mentions
The composite flame-retardant agent used for the flame retardant rubber.
Technical solution: a kind of flame retardant rubber composition of the present invention, by weight, including 20-40 parts of neoprene rubbers
Glue, 30-50 part EP rubbers, 15-25 parts of butadiene rubbers, 20-30 parts of nitrile rubbers, 2-4 parts of natural rubbers, 10-20 parts of epoxies
Resin, 0.5-1 part sulphur, 3-4 parts of zinc oxide, 3-5 parts of stearic acid, 4-10 parts of naphthenic oils, 1-2 parts of silane coupling agents, 30-40 parts
Filler and 30-40 parts of fire retardants；The filler is made of the high wear-resistant carbon black that mass ratio is 1:2-3 with barium sulfate；Institute
Fire retardant is stated to be made of the modified magnesium hydroxide that mass ratio is 1:1-5 with modified aluminium hydroxide；The modified magnesium hydroxide is by matter
Amount is than being that the magnesium hydroxide of 10:2-5 is ground with stearic acid；The hydrogen-oxygen that the modified aluminium hydroxide is 10:1-3 by mass ratio
Change aluminium to grind with silane coupling agent.
Above-mentioned flame retardant rubber composition, by weight, including 30-35 parts of neoprenes, 35-40 parts of EP rubbers, 20-
25 parts of butadiene rubbers, 25-30 parts of nitrile rubbers, 3 parts of natural rubbers, 15-18 parts of epoxy resin, 0.8 part of sulphur, 3-4 parts of oxidations
Zinc, 3-4 part stearic acid, 6-8 parts of naphthenic oils, 1-2 parts of silane coupling agents, 35-40 parts of fillers and 35-40 parts of fire retardants；Institute
Filler is stated to be made of the high wear-resistant carbon black that mass ratio is 1:2-3 with barium sulfate；The fire retardant is changing for 1:2-3 by mass ratio
Property magnesium hydroxide and modified aluminium hydroxide form；The magnesium hydroxide and stearic acid that the modified magnesium hydroxide is 10:3 by mass ratio
It grinds；The modified aluminium hydroxide is ground by the aluminium hydroxide that mass ratio is 10:2 with silane coupling agent.
Above-mentioned flame retardant rubber composition, by weight, including 35 parts of neoprenes, 38 parts of EP rubbers, 20 parts of suitable fourths
Rubber, 27 parts of nitrile rubbers, 3 parts of natural rubbers, 18 parts of epoxy resin, 0.8 part of sulphur, 3 parts of zinc oxide, 3 parts of stearic acid, 7 parts
Naphthenic oil, 2 parts of silane coupling agents, 35 parts of fillers and 35 parts of fire retardants；The high abrasion that the filler is 1:3 by mass ratio
Carbon black and barium sulfate form；The fire retardant is made of the modified magnesium hydroxide that mass ratio is 1:2 with modified aluminium hydroxide；It is described
Modified magnesium hydroxide is ground by the magnesium hydroxide that mass ratio is 10:3 with stearic acid；The modified aluminium hydroxide is by mass ratio
It is ground for the aluminium hydroxide and silane coupling agent of 10:2.
Epoxy resin of the present invention is preferably novolac epoxy resin.
Above-mentioned flame retardant rubber composition further includes by weight 10-20 parts of polypropylene.Polypropylene is as rubber filling
The toughness of rubber can be improved in modified material.
It further include 15-20 parts of polypropylene by weight in above-mentioned composition.
The composite flame-retardant agent of flame retardant rubber of the present invention, by mass ratio be 1:1-5 modified magnesium hydroxide with change
Property aluminium hydroxide composition；The modified magnesium hydroxide is ground by the magnesium hydroxide that mass ratio is 10:2-5 with stearic acid；Institute
Modified aluminium hydroxide is stated to be ground by the aluminium hydroxide that mass ratio is 10:1-3 with silane coupling agent.
The partial size of barium sulfate described in heretofore described flame retardant rubber composition is preferably 50-100nm.
The utility model has the advantages that improving the anti-flammability of rubber by modified magnesium hydroxide and modified aluminium hydroxide in (1) present invention
Energy；(2) dispersion of modified magnesium hydroxide and modified aluminium hydroxide in system is improved, and it is further that silane coupling agent is added
The amalgamation for improving inorganic system and organic system improves the overall performance of material；(3) epoxy resin can be used as crosslinking
Agent uses, and improves the toughness of rubber；(4) polypropylene in the present invention increases the toughness of rubber；(5) it in the present invention, is added
Barium sulfate improves the mechanical property of flame retardant rubber.
Specific embodiment
One, raw material sources
Silane coupling agent is KH560；
Polypropylene is purchased from Suzhou Dao Chou engineering plastic Co., Ltd；
The novolac epoxy resin trade mark is 638S；
Remaining material is commercially available gained.
Two, performance measurement
Referring to the tensile strength and elongation at break of GB1040-79 method measurement flame retardant rubber；
Referring to the limit oxygen index of GB2406-80 sample measurement sample.
Three, sample preparation
The preparation of 3.1 modified magnesium hydroxides
10 parts of fire retardant magnesium hydroxides are weighed, 3 parts of stearic acid disperse stearic acid in 3 part of 95% ethanol solution, will divide
Dissipating has stearic ethanol solution to be added in 10 parts of fire retardant magnesium hydroxides, grinds 30min, vacuum drying, after drying
Modified magnesium hydroxide flame retardant agent continues to grind 20min, obtains final product.It is ground by the magnesium hydroxide that mass ratio is 10:3 with stearic acid
It grinds.
The preparation of 3.2 modified aluminium hydroxides
10 parts of fire retardant aluminium hydroxides are weighed, Silane coupling agent KH550 is dispersed 2 parts by 2 parts of Silane coupling agent KH550s
In 95% ethanol solution, the ethanol solution for being dispersed with Silane coupling agent KH550 is added in 10 parts of fire retardant aluminium hydroxides, grinding
Modified aluminium hydroxide fire retardant after drying is continued to grind 20min, obtains final product by 30min, vacuum drying.
The preparation of 3.3 flame retardant rubber samples
Embodiment 1: being 20 parts of neoprenes, 30 parts of EP rubbers, 15 parts of butadiene rubbers, 20 parts of butyronitrile rubbers by parts by weight
Glue, 2 parts of natural rubbers, 10 parts of epoxy resin, 0.5 part of sulphur, 3 parts of zinc oxide, 3 parts of stearic acid, 4 parts of naphthenic oils, 1 part of silane idol
The 20 of modified magnesium hydroxide, the preparation of 3.2 parts prepared by connection agent, 10 parts of high wear-resistant carbon blacks, 20 parts of barium sulfate, 10 part of 3.1 part
Part modified aluminium hydroxide pours into mixer, is not pressed into the case where weight after mixing evenly, then be kneaded, the water of mixer
Temperature control system is at 70 DEG C hereinafter, material is discharged when being 115-120 DEG C in compressed air pressure 0.7-0.9MPa, material temperature；Mixer is arranged
Material is sent into open mill mill, 85-90 DEG C of preceding roll temperature, 75-80 DEG C of rear roll temperature, roll spacing 0.3-0.7mm, benefit refining 3-5 times out；
Material after mill is sent into slice machining, obtains cooling, coolant water temperature≤35 DEG C after tablet；Vulcanization: tablet is sent into flat
Plate vulcanizer carries out vulcanizing treatment, steam pressure 0.6-0.7MPa, vulcanization time 25min；The sheet material vulcanizated is placed cold
But, it is sliced deburring, obtains finished product.
Embodiment 2: being 40 parts of neoprenes, 50 parts of EP rubbers, 25 parts of butadiene rubbers, 30 parts of butyronitrile rubbers by parts by weight
Glue, 4 parts of natural rubbers, 20 parts of epoxy resin, 1 part of sulphur, 4 parts of zinc oxide, 5 parts of stearic acid, 10 parts of naphthenic oils, 2 parts of silane idols
The 30 of modified magnesium hydroxide, the preparation of 3.2 parts prepared by connection agent, 10 parts of high wear-resistant carbon blacks, 30 parts of barium sulfate, 10 part of 3.1 part
Part modified aluminium hydroxide pours into mixer, is not pressed into the case where weight after mixing evenly, then be kneaded, the water of mixer
Temperature control system is at 70 DEG C hereinafter, material is discharged when being 115-120 DEG C in compressed air pressure 0.7-0.9MPa, material temperature；Mixer is arranged
Material is sent into open mill mill, 85-90 DEG C of preceding roll temperature, 75-80 DEG C of rear roll temperature, roll spacing 0.3-0.7mm, benefit refining 3-5 times out；
Material after mill is sent into slice machining, obtains cooling, coolant water temperature≤35 DEG C after tablet；Vulcanization: tablet is sent into flat
Plate vulcanizer carries out vulcanizing treatment, steam pressure 0.6-0.7MPa, vulcanization time 20min；The sheet material vulcanizated is placed cold
But, it is sliced deburring, obtains finished product.
Embodiment 3: being 30 parts of neoprenes, 35 parts of EP rubbers, 20 parts of butadiene rubbers, 25 parts of butyronitrile rubbers by parts by weight
Glue, 3 parts of natural rubbers, 15 parts of epoxy resin, 0.8 part of sulphur, 4 parts of zinc oxide, 4 parts of stearic acid, 6 parts of naphthenic oils, 1 part of silane idol
The 20 of modified magnesium hydroxide, the preparation of 3.2 parts prepared by connection agent, 10 parts of high wear-resistant carbon blacks, 20 parts of barium sulfate, 10 part of 3.1 part
Part modified aluminium hydroxide pours into mixer, is not pressed into the case where weight after mixing evenly, then be kneaded, the water of mixer
Temperature control system is at 70 DEG C hereinafter, material is discharged when being 115-120 DEG C in compressed air pressure 0.7-0.9MPa, material temperature；Mixer is arranged
Material is sent into open mill mill, 85-90 DEG C of preceding roll temperature, 75-80 DEG C of rear roll temperature, roll spacing 0.3-0.7mm, benefit refining 3-5 times out；
Material after mill is sent into slice machining, obtains cooling, coolant water temperature≤35 DEG C after tablet；Vulcanization: tablet is sent into flat
Plate vulcanizer carries out vulcanizing treatment, steam pressure 0.6-0.7MPa, vulcanization time 25min；The sheet material vulcanizated is placed cold
But, it is sliced deburring, obtains finished product.
Embodiment 4: being 35 parts of neoprenes, 40 parts of EP rubbers, 25 parts of butadiene rubbers, 30 parts of butyronitrile rubbers by parts by weight
Glue, 3 parts of natural rubbers, 18 parts of epoxy resin, 0.8 part of sulphur, 4 parts of zinc oxide, 4 parts of stearic acid, 8 parts of naphthenic oils, 2 parts of silane idols
The 30 of modified magnesium hydroxide, the preparation of 3.2 parts prepared by connection agent, 10 parts of high wear-resistant carbon blacks, 30 parts of barium sulfate, 10 part of 3.1 part
Part modified aluminium hydroxide pours into mixer, is not pressed into the case where weight after mixing evenly, then be kneaded, the water of mixer
Temperature control system is at 70 DEG C hereinafter, material is discharged when being 115-120 DEG C in compressed air pressure 0.7-0.9MPa, material temperature；Mixer is arranged
Material is sent into open mill mill, 85-90 DEG C of preceding roll temperature, 75-80 DEG C of rear roll temperature, roll spacing 0.3-0.7mm, benefit refining 3-5 times out；
Material after mill is sent into slice machining, obtains cooling, coolant water temperature≤35 DEG C after tablet；Vulcanization: tablet is sent into flat
Plate vulcanizer carries out vulcanizing treatment, steam pressure 0.6-0.7MPa, vulcanization time 20min；The sheet material vulcanizated is placed cold
But, it is sliced deburring, obtains finished product.
Embodiment 5: being 35 parts of neoprenes, 38 parts of EP rubbers, 20 parts of butadiene rubbers, 27 parts of butyronitrile rubbers by parts by weight
Glue, 3 parts of natural rubbers, 18 parts of epoxy resin, 0.8 part of sulphur, 3 parts of zinc oxide, 3 parts of stearic acid, 7 parts of naphthenic oils, 2 parts of silane idols
The 25 of modified magnesium hydroxide, the preparation of 3.2 parts prepared by connection agent, 10 parts of high wear-resistant carbon blacks, 25 parts of barium sulfate, 10 part of 3.1 part
Part modified aluminium hydroxide pours into mixer, is not pressed into the case where weight after mixing evenly, then be kneaded, the water of mixer
Temperature control system is at 70 DEG C hereinafter, material is discharged when being 115-120 DEG C in compressed air pressure 0.7-0.9MPa, material temperature；Mixer is arranged
Material is sent into open mill mill, 85-90 DEG C of preceding roll temperature, 75-80 DEG C of rear roll temperature, roll spacing 0.3-0.7mm, benefit refining 3-5 times out；
Material after mill is sent into slice machining, obtains cooling, coolant water temperature≤35 DEG C after tablet；Vulcanization: tablet is sent into flat
Plate vulcanizer carries out vulcanizing treatment, steam pressure 0.6-0.7MPa, vulcanization time 25min；The sheet material vulcanizated is placed cold
But, it is sliced deburring, obtains finished product.
Embodiment 6: being 35 parts of neoprenes, 38 parts of EP rubbers, 20 parts of butadiene rubbers, 27 parts of butyronitrile rubbers by parts by weight
Glue, 3 parts of natural rubbers, 18 parts of epoxy resin, 15 parts of polypropylene, 0.8 part of sulphur, 3 parts of zinc oxide, 3 parts of stearic acid, 7 parts of cycloalkanes
Oil, 2 parts of silane coupling agents, 10 parts of high wear-resistant carbon blacks, 25 parts of barium sulfate, the modified magnesium hydroxide of 10 part of 3.1 part preparation, 3.2
25 parts of modified aluminium hydroxides of part preparation pour into mixer, are not pressed into the case where weight after mixing evenly, then mixed
The water temperature of refining, mixer is controlled at 70 DEG C hereinafter, compressed air pressure 0.7-0.9MPa, effluent when material temperature is 115-120 DEG C
Material；Mixer discharge material is sent into open mill mill, 85-90 DEG C of preceding roll temperature, 75-80 DEG C of rear roll temperature, roll spacing 0.3-
0.7mm mends refining 3-5 times；Material after mill is sent into slice machining, obtains cooling, coolant water temperature≤35 DEG C after tablet；Sulphur
Change: tablet being sent into vulcanizing press and carries out vulcanizing treatment, steam pressure 0.6-0.7MPa, vulcanization time 25min；It will vulcanization
Good sheet material places cooling, is sliced deburring, obtains finished product.
Embodiment 7: being 35 parts of neoprenes, 38 parts of EP rubbers, 20 parts of butadiene rubbers, 27 parts of butyronitrile rubbers by parts by weight
Glue, 3 parts of natural rubbers, 18 parts of epoxy resin, 20 parts of polypropylene, 0.8 part of sulphur, 3 parts of zinc oxide, 3 parts of stearic acid, 7 parts of cycloalkanes
Oil, 2 parts of silane coupling agents, 10 parts of high wear-resistant carbon blacks, 25 parts of barium sulfate, the modified magnesium hydroxide of 10 part of 3.1 part preparation, 3.2
25 parts of modified aluminium hydroxides of part preparation pour into mixer, are not pressed into the case where weight after mixing evenly, then mixed
The water temperature of refining, mixer is controlled at 70 DEG C hereinafter, compressed air pressure 0.7-0.9MPa, effluent when material temperature is 115-120 DEG C
Material；Mixer discharge material is sent into open mill mill, 85-90 DEG C of preceding roll temperature, 75-80 DEG C of rear roll temperature, roll spacing 0.3-
0.7mm mends refining 3-5 times；Material after mill is sent into slice machining, obtains cooling, coolant water temperature≤35 DEG C after tablet；Sulphur
Change: tablet being sent into vulcanizing press and carries out vulcanizing treatment, steam pressure 0.6-0.7MPa, vulcanization time 25min；It will vulcanization
Good sheet material places cooling, is sliced deburring, obtains finished product.
Comparative example 1: fire retardant is 10 parts of non-modified magnesium hydroxides, 25 parts of unmodified aluminium hydroxides, remaining is the same as real
Apply example 7.
Comparative example 2: without silane coupling agent, remaining is the same as embodiment 7.
Comparative example 3: without epoxy resin, remaining is the same as embodiment 7.
Comparative example 4: fire retardant is 35 parts of modified magnesium hydroxides, and no modified aluminium hydroxide, remaining is the same as embodiment 7.
Comparative example 5: fire retardant is 35 parts of modified aluminium hydroxides, and no modified magnesium hydroxide, remaining is the same as embodiment 7.
Comparative example 6: filler is 35 parts of high wear-resistant carbon blacks, and no barium sulfate, remaining is the same as embodiment 7.
Four, performance measurement result
Sample prepared by Part III, measures its mechanical property and flame retardant property, measurement result is shown in Table 1 respectively.
The mechanical property and flame retardant property measurement result of the different flame retardant rubbers of table 1
| Sample | Tensile strength (MPa) | Elongation at break (%) | Limit oxygen index (%) |
| Embodiment 1 | 34.2 | 9.7 | 30.1 |
| Embodiment 2 | 33.1 | 9.4 | 31.9 |
| Embodiment 3 | 34.0 | 9.5 | 32.4 |
| Embodiment 4 | 34.8 | 9.6 | 31.5 |
| Embodiment 5 | 35.1 | 9.8 | 32.6 |
| Embodiment 6 | 36.8 | 10.3 | 33.0 |
| Embodiment 7 | 36.9 | 10.5 | 33.2 |
| Comparative example 1 | 32.9 | 8.5 | 29.2 |
| Comparative example 2 | 31.7 | 8.1 | 30.9 |
| Comparative example 3 | 34.9 | 7.6 | 31.4 |
| Comparative example 4 | 34.3 | 9.8 | 30.8 |
| Comparative example 5 | 36.9 | 9.5 | 31.2 |
| Comparative example 6 | 27.9 | 15.5 | 30.4 |
It can be seen from the result of table 1 influence of non-modified magnesium hydroxide and aluminium hydroxide to limit oxygen index compared with
Greatly, the flame retardant effect of fire retardant modified is more preferable；Can be seen that from comparative example 2, silane coupling agent be individually added into be in order to
The mechanical property and optimization flame retardant effect for increasing flame retardant rubber, so that magnesium hydroxide modified and modified aluminium hydroxide are in body
It is better dispersed in system；It can be seen that from comparative example 3 and the comparing result of embodiment 7, epoxy resin is to flame retardant rubber in the present invention
Elongation at break be affected, the brittleness of rubber increases；From comparative example 4 and comparative example 5 as can be seen that fire retardant Bu Tong not
Flame retardant effect is only influenced, and has an effect on the mechanics effect of flame retardant rubber, therefore needs modified magnesium hydroxide and modification in the present invention
Aluminium hydroxide improves the overall performance of material collectively as fire retardant.From comparative example 7 as can be seen that barium sulfate is in the present invention
The mechanical property for improving material is added in excellent filler.
Claims (8)
1. a kind of flame retardant rubber composition, which is characterized in that by weight, including 20-40 parts of neoprenes, 30-50 parts of second
Third rubber, 15-25 part butadiene rubber, 20-30 parts of nitrile rubbers, 2-4 parts of natural rubbers, 10-20 parts of epoxy resin, 0.5-1 parts
Sulphur, 3-4 part zinc oxide, 3-5 parts of stearic acid, 4-10 parts of naphthenic oils, 1-2 parts of silane coupling agents, 30-40 parts of fillers and
30-40 parts of fire retardants；The filler is made of the high wear-resistant carbon black that mass ratio is 1:2-3 with barium sulfate；The fire retardant by
The modified magnesium hydroxide and modified aluminium hydroxide that mass ratio is 1:1-5 form；The modified magnesium hydroxide is 10:2- by mass ratio
5 magnesium hydroxide is ground with stearic acid；The aluminium hydroxide and silane that the modified aluminium hydroxide is 10:1-3 by mass ratio
Coupling agent is ground.
2. flame retardant rubber composition according to claim 1, which is characterized in that by weight, including 30-35 parts of neoprenes
Rubber, 35-40 part EP rubbers, 20-25 parts of butadiene rubbers, 25-30 parts of nitrile rubbers, 3 parts of natural rubbers, 15-18 parts of epoxies
Resin, 0.8 part of sulphur, 3-4 parts of zinc oxide, 3-4 parts of stearic acid, 6-8 parts of naphthenic oils, 1-2 parts of silane coupling agents, 35-40 parts fill out
Fill agent and 35-40 parts of fire retardants；The filler is made of the high wear-resistant carbon black that mass ratio is 1:2-3 with barium sulfate；It is described
Fire retardant is made of the modified magnesium hydroxide that mass ratio is 1:2-3 with modified aluminium hydroxide；The modified magnesium hydroxide is by quality
It is ground than the magnesium hydroxide for 10:3 with stearic acid；The modified aluminium hydroxide by mass ratio be 10:2 aluminium hydroxide with
Silane coupling agent is ground.
3. flame retardant rubber composition according to claim 1, which is characterized in that by weight, including 35 parts of neoprene rubbers
Glue, 38 parts of EP rubbers, 20 parts of butadiene rubbers, 27 parts of nitrile rubbers, 3 parts of natural rubbers, 18 parts of epoxy resin, 0.8 part of sulphur,
3 parts of zinc oxide, 3 parts of stearic acid, 7 parts of naphthenic oils, 2 parts of silane coupling agents, 35 parts of fillers and 35 parts of fire retardants；The filling
Agent is made of the high wear-resistant carbon black that mass ratio is 1:3 with barium sulfate；The modified magnesium hydroxide that the fire retardant is 1:2 by mass ratio
It is formed with modified aluminium hydroxide；The modified magnesium hydroxide is ground by the magnesium hydroxide that mass ratio is 10:3 with stearic acid；
The modified aluminium hydroxide is ground by the aluminium hydroxide that mass ratio is 10:2 with silane coupling agent.
4. flame retardant rubber composition according to claim 1, which is characterized in that the epoxy resin is epoxy novolac tree
Rouge.
5. flame retardant rubber composition according to claim 1, which is characterized in that by weight, in the composition also
Including 10-20 parts of polypropylene.
6. flame retardant rubber composition according to claim 5, which is characterized in that by weight, in the composition also
Including 15-20 parts of polypropylene.
7. a kind of composite flame-retardant agent, which is characterized in that the modified magnesium hydroxide and modified aluminium hydroxide group for being 1:1-5 by mass ratio
At；The modified magnesium hydroxide is ground by the magnesium hydroxide that mass ratio is 10:2-5 with stearic acid；The modified hydroxide
Aluminium is ground by the aluminium hydroxide that mass ratio is 10:1-3 with silane coupling agent.
8. flame retardant rubber composition according to claim 1, which is characterized in that the partial size of the barium sulfate is 50-
100nm。
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