CN101381493A - Halogen-free flameproof ternary ethlene propyene rubbercompound material and preparation method thereof - Google Patents
Halogen-free flameproof ternary ethlene propyene rubbercompound material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a halogen-free flame-retardant ethylene propylene terpolymer composite material and a preparation method thereof. The preparation method is characterized in that 30 to 35 percent of ethylene propylene terpolymer and 7 to 10 percent of macromolecular compatilizer are mixed according to the mass ratio; 2 to 3 percent of processing agent, 51 to 55 percent of metal hydroxide, 1 to 4 percent of rare earth metal oxide, 1.0 to 1.5 percent of vulcanizing agent and a vulcanization accelerator are added into the mixture, uniformly mixed, stands for 8 to 10 hours and then vulcanized for 15 to 20 minutes at a temperature of between 170 and 180 DEG C, so as to obtain the product; the oxygen index of the product is 39 and reaches V0 level in UL-94 test; the maximum heat release rate value is 235 kW.m<-2>, and the total heat release amount is 87.1 MJ.m<-2>; the combustion carbon residue amount is 46.0 percent; the initial thermal decomposition temperature is 324 DEG C, and the maximum thermal decomposition temperature is 448 DEG C; and after the product is aged for 7 days at a temperature of 100 DEG C, the loss rate of the tensile strength and the elongation at break is 7 percent and 12.5 percent respectively.
Description
Technical field
The invention belongs to the fire retardant material technical field, be specifically related to halogen-free flameproof ternary ethlene propyene rubbercompound material and preparation method thereof.
Background technology
Electric wire is widely used in life and the industrial every field, because it is in the importance of aspects such as energy transmission and information transmission, the fire-retardant and fire prevention of electric wire is the important research field that people pay close attention to always.Terpolymer EP rubber is at present at the bigger cable material raw material of China's usage quantity.But, similar to other hydrocarbon rubbers, it belongs to inflammable material, and oxygen index is lower, and heat release rate is higher, and living cigarette amount is bigger in combustion processes, and neat coal amout is very low.Therefore, terpolymer EP rubber is carried out fire-retardant being necessary.
Existing widely used halogen containing flame-retardant, generate when burn because of it cigarette is arranged in a large number, poisonous and have corrosive gas, can cause merely the corrosion of the Circuits System switch that can not cause and other metal objects to reach pollution to environment by fire institute; Easily human respiratory tract and other organs are caused damage, even can be because of the threat to life safety of suffocating.In recent years, the U.S., Britain, Norway and Australia formulate or enact a law, and some fire retardant material is carried out combustion toxicity test or regulation combustion acid gas release amount, and the exploitation halogen-free flame retardants replaces the trend that halogen containing flame-retardant has become world's flame retardant area.
Metal hydroxides (magnesium hydroxide, aluminium hydroxide etc.) source is abundant, cheap, its as fire retardant be applied to fire retardant polyolefin have nontoxic, press down advantage such as cigarette, flame retarding efficiency is low but required addition is big, can have a strong impact on the mechanical property of material, thereby limit its range of application.
" macromolecular material and engineering " (Macromolecular materialsand engineering, 2001 of John Wei Li (John Wiley) company; 286:377) point out in magazine " aluminium hydroxide is filled the fire-retardant and mechanical property of the ternary ethlene propyene rubbercompound material " literary composition, when with carbon black and aluminium hydroxide when composite, can under less aluminium hydroxide addition, can reach vertical combustion test UL-94V0 level, keep good mechanics and ageing-resistant performance again.Mention among the Chinese patent application publication number CN 1903895A " a kind of preparation method of Halogen Free Flame Retardant EPDM ", with unsaturated acid and the composite limiting oxygen index(LOI) that can improve the mechanical property of material and improve material of metal hydroxides; But,, make it on using, be subjected to certain limitation because the price of carbon black and unsaturated acid is relative higher.
China has very abundant rare earth Mineral resources, and rare-earth oxide has been applied to fire-retardant aspect now.Therefore, if rare-earth oxide cheap and easy to get can be incorporated into metal hydroxides fire retardant material system, will have stronger practical significance.
Summary of the invention
The objective of the invention is to propose a kind of halogen-free flameproof ternary ethlene propyene rubbercompound material and preparation method thereof, to improve flame retarding efficiency, flame retardant properties and the thermal stability of metal hydroxides fire retardant trielement ethylene-propylene rubber system.
Halogen-free flameproof ternary ethlene propyene rubbercompound material of the present invention is characterized in that being made up of following composition and mass ratio thereof:
Terpolymer EP rubber 30-35%
High molecular compatible agent 7-10%
Metal hydroxides 51-55%
Rare-earth oxide 1-4%
Processing aid 2-3%
Vulcanizing agent and vulcanization accelerator 1.0-1.5%.
The preparation method of halogen-free flameproof ternary ethlene propyene rubbercompound material of the present invention is characterized in that: press mass ratio the terpolymer EP rubber of 30-35% is mixed with the high molecular compatible agent of 7-10%; The processing aid that adds 2-3%, the metal hydroxides of 51-55% and the rare-earth oxide of 1-4%, the vulcanizing agent of 1.0-1.5% and vulcanization accelerator, mixing evenly after, placed 8-10 hour, 170-180 ℃ of sulfuration 15-20 minute, promptly obtain halogen-free flameproof ternary ethlene propyene rubbercompound material again.
The 3rd monomer of described terpolymer EP rubber is ethylidene norbornene, dicyclopentadiene or 1, and 4-hexadiene, therein ethylene content are 40-80%;
Described high molecular compatible agent is selected from maleic anhydride graft vinyl acetate copolymer, diacetyl oxide grafting vinyl acetate copolymer or Succinic anhydried grafting vinyl acetate copolymer;
Described metal hydroxides is selected from magnesium hydroxide or aluminium hydroxide;
Described rare-earth oxide is selected from lanthanum sesquioxide, europiumsesquioxide, samarium sesquioxide, yttria, praseodymium sesquioxide, or the based metallic oxides with mixed rare earth of forming by mass ratio 2～1:1 by lanthanum sesquioxide and europiumsesquioxide, the based metallic oxides with mixed rare earth of forming by mass ratio 2～1:1 by lanthanum sesquioxide and samarium sesquioxide, based metallic oxides with mixed rare earth of forming by mass ratio 2～1:1 by lanthanum sesquioxide and yttria or the based metallic oxides with mixed rare earth of forming by mass ratio 2～1:1 by lanthanum sesquioxide and praseodymium sesquioxide.
Described processing aid is made up of by mass ratio 5～3:1 zinc oxide and stearic acid or magnesium oxide and stearic acid are pressed mass ratio 5～3:1 and formed;
Described vulcanizing agent and vulcanization accelerator are made up of by mass ratio 3～2:1.5～1:1 insoluble sulfur and mercaptobenzothiazole and tetramethyl-thiuram disulfide.
This halogen-free flameproof ternary ethlene propyene rubbercompound material that the present invention proposes and preparation method thereof, rare-earth oxide and metal hydroxides are combined, overcome the low defective of flame retarding efficiency that existing metal hydroxides flameproof ternary ethlene propyene rubbercompound material exists, and the relatively poor problem of material heat aging property.
Preparation method's technology of the present invention is simple, produces pollution-freely, and production cost is lower.Halogen-free flameproof ternary ethlene propyene rubbercompound material of the present invention has good flame retardant property and thermostability, when lanthanum sesquioxide when 2% and 53% magnesium hydroxide are composite, the oxygen index of prepared material is up to 39.5, can pass through vertical combustion testing standard UL-94 V0 level, 100 ℃ aging after 7 days, and the rate of loss of tensile strength and elongation at break is respectively 6 and 17.5%; And the oxygen index that only adds the prepared material of 55% magnesium hydroxide is 36.5, and can't reach UL-94 V0 level, and 100 ℃ aging after 7 days, and the rate of loss of tensile strength and elongation at break is respectively up to 24.7 and 28.7%.Material of the present invention can be used for electric wire and cable material, as insulation layer or sheath; Hot material conveyor belt, household electrical appliance accessory etc.
Embodiment
The present invention will be further described below in conjunction with specific embodiment.
Embodiment 1:
At first with magnesium hydroxide and lanthanum sesquioxide 80 ℃ of dryings 12 hours, use high mixer magnesium hydroxide and lanthanum sesquioxide ratio thorough mixing with 1:54.Take by weighing terpolymer EP rubber 80 grams respectively; Maleic anhydride grafted ethene-acetate ethylene copolymer 20 grams; Zinc oxide 5 grams; Stearic acid 1 gram; Insoluble sulfur 1.9 grams; Mercaptobenzothiazole 1 gram; Tetramethyl-thiuram disulfide 0.5 gram; Magnesium hydroxide 131 grams, lanthanum sesquioxide 2.7 grams.
Terpolymer EP rubber and high molecular compatible agent maleic anhydride grafted ethene-acetate ethylene copolymer are added in two roller mills, the roller temperature is at 110 ℃, 50 rev/mins of rotating speeds, add processing aid zinc oxide and stearic acid after mixing 3 minutes, mixing once more 5 minutes, add mixing fire retardant magnesium hydroxide and the lanthanum sesquioxide that utilizes high mixer to mix then, mixing 10 minutes, add vulcanizing agent insoluble sulfur and mercaptobenzothiazole, tetramethyl-thiuram disulfide at last, mixing 5 minutes, and thin-pass 6 times, the thin slice blanking of making 2 millimeters thickness.Above material was placed after 8 hours, 170 ℃ of sulfurations 15 minutes, promptly obtained halogen-free flameproof ternary ethlene propyene rubbercompound material.
By the limiting oxygen index(LOI) tester, the vertical combustion tester is tested as can be known the halogen-free flameproof ternary ethlene propyene rubbercompound material sample for preparing in the present embodiment, and the oxygen index of this material can reach the V0 level in the UL-94 test up to 39; Adopt tapered calorimeter test as can be known, the material maximum heat rate of release value for preparing in the present embodiment has only 235kWm
-2, the total heat burst size has only 87.1MJm
-2, burning carbon residue amount 46.0%; Through the thermogravimetric analyzer test as can be known, 324 ℃ of the initial heat decomposition temperatures of the material for preparing in the present embodiment, 448 ℃ of maximum heat decomposition temperatures, 100 ℃ are aging after 7 days, and the rate of loss of tensile strength and elongation at break has only 7 and 12.5% respectively.
Embodiment 2:
At first with magnesium hydroxide and lanthanum sesquioxide 90 ℃ of dryings 10 hours, use high mixer magnesium hydroxide and lanthanum sesquioxide ratio thorough mixing with 2:53.Take by weighing terpolymer EP rubber 80 grams respectively; Maleic anhydride grafted ethene-acetate ethylene copolymer 20 grams; Zinc oxide 5 grams; Stearic acid 1 gram; Insoluble sulfur 1.9 grams; Mercaptobenzothiazole 1 gram; Tetramethyl-thiuram disulfide 0.5 gram; Magnesium hydroxide 128 grams, lanthanum sesquioxide 5.7 grams.
Terpolymer EP rubber and high molecular compatible agent maleic anhydride grafted ethene-acetate ethylene copolymer are added in two roller mills, the roller temperature is at 110 ℃, 50 rev/mins of rotating speeds, add processing aid zinc oxide and stearic acid after mixing 3 minutes, mixing once more 5 minutes, add mixing fire retardant magnesium hydroxide and the lanthanum sesquioxide that utilizes high mixer to mix then, mixing 10 minutes, add vulcanizing agent insoluble sulfur and mercaptobenzothiazole, tetramethyl-thiuram disulfide at last, mixing 5 minutes, and thin-pass 6 times, the thin slice blanking of making 2 millimeters thickness.Above material was placed after 8 hours, 170 ℃ of sulfurations 15 minutes, promptly obtained halogen-free flameproof ternary ethlene propyene rubbercompound material.
By the limiting oxygen index(LOI) tester, the vertical combustion tester is tested as can be known the halogen-free flameproof ternary ethlene propyene rubbercompound material sample for preparing in the present embodiment, and the oxygen index of this material can reach the V0 level in the UL-94 test up to 39.5; Adopt tapered calorimeter test as can be known, the material maximum heat rate of release value for preparing in the present embodiment has only 228kWm
-2, the total heat burst size has only 90.6MJm
-2, burning carbon residue amount 47.5%; Through the thermogravimetric analyzer test as can be known, 322 ℃ of the initial heat decomposition temperatures of the material for preparing in the present embodiment, 448 ℃ of maximum heat decomposition temperatures, 100 ℃ are aging after 7 days, and the rate of loss of tensile strength and elongation at break has only 6 and 17.5% respectively.
Comparative Examples 1:
At first with magnesium hydroxide 90 ℃ of dryings 10 hours.Take by weighing terpolymer EP rubber 80 grams respectively; Maleic anhydride grafted ethene-acetate ethylene copolymer 20 grams; Zinc oxide 5 grams; Stearic acid 1 gram; Insoluble sulfur 1.9 grams; Mercaptobenzothiazole 1 gram; Tetramethyl-thiuram disulfide 0.5 gram; Magnesium hydroxide 133.7 grams.
Terpolymer EP rubber and high molecular compatible agent maleic anhydride grafted ethene-acetate ethylene copolymer are added in two roller mills, the roller temperature is at 110 ℃, 50 rev/mins of rotating speeds add processing aid zinc oxide and stearic acid, mixing once more 5 minutes after mixing 3 minutes, add fire retardant magnesium hydroxide then, mixing 10 minutes, add vulcanizing agent insoluble sulfur and mercaptobenzothiazole, tetramethyl-thiuram disulfide at last, mixing 5 minutes, and thin-pass 6 times, the thin slice blanking of making 2 millimeters thickness.Above material was placed after 8 hours, 170 ℃ of curing temperatures, and curing time 15 minutes promptly obtains halogen-free flameproof ternary ethlene propyene rubbercompound material.
By the limiting oxygen index(LOI) tester, the vertical combustion tester is tested as can be known the halogen-free flameproof ternary ethlene propyene rubbercompound material sample for preparing in the present embodiment, and the oxygen index of this material reaches 37, can't reach the V0 level in the UL-94 test; Adopt tapered calorimeter test as can be known, this material maximum heat rate of release value is 349kWm
-2, the total heat burst size is 99.4MJm
-2, burning carbon residue amount is 37.0%; Through the thermogravimetric analyzer test as can be known, 314 ℃ of the initial heat decomposition temperatures of this material, 450 ℃ of maximum heat decomposition temperatures, 100 ℃ are aging after 7 days, and the rate of loss of tensile strength and elongation at break reaches 24.7 and 28.7% respectively.
Claims (8)
1, a kind of halogen-free flameproof ternary ethlene propyene rubbercompound material is characterized in that being made up of following composition and mass ratio thereof:
Terpolymer EP rubber 30-35%
High molecular compatible agent 7-10%
Metal hydroxides 51-55%
Rare-earth oxide 1-4%
Processing aid 2-3%
Vulcanizing agent and vulcanization accelerator 1.0-1.5%.
2, the preparation method of the described halogen-free flameproof ternary ethlene propyene rubbercompound material of claim 1 is characterized in that: press mass ratio the terpolymer EP rubber of 30-35% is mixed with the high molecular compatible agent of 7-10%; The processing aid that adds 2-3%, the metal hydroxides of 51-55% and the rare-earth oxide of 1-4%, the vulcanizing agent of 1.0-1.5% and vulcanization accelerator, mixing evenly after, placed 8-10 hour, 170-180 ℃ of sulfuration 15-20 minute, promptly obtain halogen-free flameproof ternary ethlene propyene rubbercompound material again.
3, the preparation method of halogen-free flameproof ternary ethlene propyene rubbercompound material according to claim 1, the 3rd monomer that is characterised in that described terpolymer EP rubber is ethylidene norbornene, dicyclopentadiene or 1,4-hexadiene, therein ethylene content are 40-80%.
4, the preparation method of halogen-free flameproof ternary ethlene propyene rubbercompound material according to claim 1 is characterised in that described high molecular compatible agent is selected from maleic anhydride graft vinyl acetate copolymer, diacetyl oxide grafting vinyl acetate copolymer or Succinic anhydried grafting vinyl acetate copolymer.
5, the preparation method of halogen-free flameproof ternary ethlene propyene rubbercompound material according to claim 1 is characterised in that described metal hydroxides is selected from magnesium hydroxide or aluminium hydroxide.
6, the preparation method of halogen-free flameproof ternary ethlene propyene rubbercompound material according to claim 1 is characterised in that described rare-earth oxide is selected from lanthanum sesquioxide, europiumsesquioxide, samarium sesquioxide, yttria, praseodymium sesquioxide, is formed, formed, formed by mass ratio 2～1:1 or be made up of by mass ratio 2～1:1 lanthanum sesquioxide and praseodymium sesquioxide by lanthanum sesquioxide and yttria by mass ratio 2～1:1 by lanthanum sesquioxide and samarium sesquioxide by mass ratio 2～1:1 by lanthanum sesquioxide and europiumsesquioxide.
7, the preparation method of halogen-free flameproof ternary ethlene propyene rubbercompound material according to claim 1 is characterised in that described processing aid is made up of by mass ratio 5～3:1 zinc oxide and stearic acid or magnesium oxide and stearic acid are formed by mass ratio 5～3:1.
8, the preparation method of halogen-free flameproof ternary ethlene propyene rubbercompound material according to claim 1 is characterised in that described vulcanizing agent and vulcanization accelerator be made up of by mass ratio 3～2:1.5～1:1 insoluble sulfur and mercaptobenzothiazole and tetramethyl-thiuram disulfide.
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| CN101704976B (en) * | 2009-11-27 | 2012-05-23 | 北京化工大学 | Low smoke halogen-free flame retardant ethylene-propylene-diene rubber and preparation method by extrusion molding thereof |
| CN101928431B (en) * | 2009-06-25 | 2013-07-10 | 上海化工研究院 | Halogen-free flame retardant ethylene propylene diene monomer (EPDM) material and preparation method thereof |
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| CN101928431B (en) * | 2009-06-25 | 2013-07-10 | 上海化工研究院 | Halogen-free flame retardant ethylene propylene diene monomer (EPDM) material and preparation method thereof |
| CN101704976B (en) * | 2009-11-27 | 2012-05-23 | 北京化工大学 | Low smoke halogen-free flame retardant ethylene-propylene-diene rubber and preparation method by extrusion molding thereof |
| CN101781413A (en) * | 2010-03-22 | 2010-07-21 | 福建师范大学 | Preparation method of rare earth coordination crosslinking rubber |
| CN101781413B (en) * | 2010-03-22 | 2011-08-24 | 福建师范大学 | Preparation method of rare earth coordination crosslinking rubber |
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| CN106589626A (en) * | 2016-12-21 | 2017-04-26 | 上海精橡胶科技有限公司 | Environmental protection like flame-retardant elastomer material for electric appliance |
| CN110358201A (en) * | 2019-08-01 | 2019-10-22 | 东辰控股集团有限公司 | A kind of silicon rubber and ethylene propylene diene rubber Blend rubber compounded curing system and preparation method thereof |
| CN110358201B (en) * | 2019-08-01 | 2022-09-20 | 山东兴辰控股有限公司 | Silicon rubber and ethylene propylene diene monomer blended rubber compound vulcanization system and preparation method thereof |
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Application publication date: 20090311 Assignee: BAOSHENG SCIENCE AND TECHNOLOGY INNOVATION Co.,Ltd. Assignor: University of Science and Technology of China Contract record no.: 2018340000009 Denomination of invention: Halogen-free flameproof ternary ethlene propyene rubbercompound material and preparation method thereof Granted publication date: 20110824 License type: Exclusive License Record date: 20180614 |
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