CN102336970A - Polypropylene composite material incombustible for 850 DEG C glowing filament and production method thereof - Google Patents
Polypropylene composite material incombustible for 850 DEG C glowing filament and production method thereof Download PDFInfo
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- CN102336970A CN102336970A CN2011103041705A CN201110304170A CN102336970A CN 102336970 A CN102336970 A CN 102336970A CN 2011103041705 A CN2011103041705 A CN 2011103041705A CN 201110304170 A CN201110304170 A CN 201110304170A CN 102336970 A CN102336970 A CN 102336970A
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Abstract
The invention relates to a polypropylene composite material incombustible for an 850 DEG C glowing filament, which has the advantages of high flame retardancy and low cost and can easily implement large-scale production. The flame-retardant polypropylene composite material comprises the following components in parts by weight: 100 parts of polypropylene and 45-50 parts of compound flame retardant; and the compound flame retardant comprises the following components in parts by weight: 100 parts of ammonium polyphosphate, 40-60 parts of microencapsulated tri-(2,3-dibromopropyl)isocyanurate and 40-60 parts of melamine. The compound flame-retardant system can enable polypropylene to obtain strong gas-phase obstruction as well as strong solid-phase obstruction, so that the polypropylene can effectively prevent flammable gas generated by the heated material from contacting oxygen, thereby avoiding combustion and achieving the technical index of incombustibility for 850 DEG C glowing filament.
Description
Technical field
The present invention relates to belong to the plastics flame retardant area, be specifically related to 850 ℃ of nonflammable PP composite materials of a kind of glowing filament, just a kind of PP composite material of flame retardant type.
Background technology
Material glowing filament fire retardancy test is mainly used in the thermal stresses that simulation glow element or overload thermal source such as resistance or ignition source are caused at short notice; With simulation technique evaluation ignition hazard property, be applicable to plastics or non-metal insulating material part that electron and electrician product, household electrical appliance parts are used.
The flame-retardant polypropelene matrix material has been widely used in electron and electrician product and the household electrical appliance now; Conventional polypropylene fire retardant system such as bromine antimony flame-retardant system, common phosphorus nitrogen expandable flame retardant system; Though these flame-retarded technologies can be accomplished good vertical combustion grade, like 0.8mm, V-0.But because of not intercepting high temperature glowing filament inflammable gas of material production and contacting of oxygen when applying fully; Thereby combustion phenomena appears; Therefore can not satisfy the fire-retardant requirement of glowing filament that electron and electrician product and household electrical appliance industry improve day by day, nonflammable like 850 ℃ of glowing filaments.
Summary of the invention
The object of the invention will provide a kind of flame-retardant polypropelene matrix material exactly, and this Flame Retardancy can significantly improve, and is simultaneously with low cost.Simultaneously, the present invention provides the working method of this flame-retardant polypropelene matrix material.
The present invention realizes through following technical scheme: 850 ℃ of nonflammable PP composite materials of a kind of glowing filament comprise by weight: 100 parts of Vestolen PP 7052,45～50 parts of compound flame retardants; Wherein compound flame retardant is made up of following composition by weight: 100 parts of ammonium polyphosphates, micro encapsulation three-(2, the 3-dibromopropyl) 40～60 parts of chlorinated isocyanurates, 40～60 parts of trimeric cyanamides.
The technical characterstic of flame-retardant polypropylene composite material of the present invention is: micro encapsulation three-(2; The 3-dibromopropyl) chlorinated isocyanurates itself both can produce hydrogen bromide and be covered in material surface; Also can to generate density big and can stay in the bromo-phosphonium in glowing filament application point district for a long time with ammonium polyphosphate reaction, thus powerful gas phase sealing coat formed.In addition, trimeric cyanamide plays a part whipping agent and coke toughener, and ammonium polyphosphate then is pyrogenic catalyzer, can impel the glowing filament application point to form porousness coking protective membrane, forms effective solid phase barrier layer.This compositional flame-retardant system can make PP composite material obtain the intensive gas phase and intercept, and also has the intensive solid phase to intercept simultaneously, and effectively barrier material receives contacting of thermogenetic inflammable gas and oxygen, thereby avoids burning.Reach 850 ℃ the nonflammable index of glow wire test.And used starting material all are sophisticated conventional products, and cost is lower, and the product price ratio is high.Being convenient to large-scale promotion uses.
Further preferred prescription is: described compound flame retardant is made up of following composition by weight: 100 parts of ammonium polyphosphates, micro encapsulation three-(2, the 3-dibromopropyl) 43～55 parts of chlorinated isocyanurates, 43～55 parts of trimeric cyanamides.The flame retardant properties of product is best like this.
Correspondingly, the working method of 850 ℃ of nonflammable PP composite materials of a kind of glowing filament is: at first take by weighing Vestolen PP 7052, ammonium polyphosphate by formula rate, and micro encapsulation three-(2, the 3-dibromopropyl) chlorinated isocyanurates, trimeric cyanamide, raw materials mix is even; Granulation then, extrusion temperature are 180-190 ℃.Such method is convenient to accurate dosing, and technology and the step used simultaneously all are conventional equipment and technology, and be simple to operate, easy to use.Production process does not produce waste material yet, and the feature of environmental protection is good.
The further improvement of working method is: described mixing process is to use impeller to carry out, and the stirrer rotating speed is more than or equal to 650 commentaries on classics/min, maximum LV 20 meter per seconds that stir, and mixing time is 4 to 10 minutes.Just higher mixing speed should be arranged, simultaneously, because the blade outer end LV of stirring rake is maximum; Under the rotating speed condition with higher; Also to control the size of stirring rake, can mix like this, avoid simultaneously colliding at a high speed, rub and material itself is caused the impact fracture of physics or heat; Also reduce structural strength requirement, reduce equipment cost whipping device.
Described mixed material is used the twin screw extruder extruding pelletization.Assurance is extruded evenly, and the twin screw extruder stable performance is convenient to control extrusion temperature, pressure and flow simultaneously.Because twin screw extruder structure determined, in fact forcing machine be exactly that intermediate stations technological temperature technological temperature the highest, the input and output material position is lower.Correspondingly, in order to control processing temperature within aforesaid scope, be exactly in each station of twin screw extruder minimum temperature be controlled at 180 ℃, the highlyest be no more than 190 ℃; Usually the intermediate stations temperature is the highest.
Embodiment
For making more detailed understanding method of use of the present invention of those skilled in the art and technique effect, following examples and relevant detection data are provided.
Embodiment one
Ingredients by weight consists of:
Vestolen PP 7052 100Kg, ammonium polyphosphate 23.5Kg, micro encapsulation three-(2, the 3-dibromopropyl) chlorinated isocyanurates 11.75Kg, trimeric cyanamide 11.75Kg;
After compound flame retardant and Vestolen PP 7052 take by weighing by weight; Put into impeller under the condition of rotating speed 650 commentaries on classics/min, maximum stirring LV 20 meter per seconds, mixed 5 minutes, then extruding pelletization in twin screw extruder; Extrusion temperature is 180～185 ℃, makes sample 1.
Embodiment two
Ingredients by weight consists of:
Vestolen PP 7052 100Kg, ammonium polyphosphate 22.5Kg, micro encapsulation three-(2, the 3-dibromopropyl) chlorinated isocyanurates 9Kg, trimeric cyanamide 13.5Kg;
After compound flame retardant and Vestolen PP 7052 take by weighing by weight, put into impeller in rotating speed 750 commentaries on classics/min, the maximum LV that stirs
20Under the condition of meter per second, mixed 7 minutes, extruding pelletization in twin screw extruder then, extrusion temperature is 183～190 ℃, makes sample 2.
Embodiment three
Ingredients by weight consists of:
Vestolen PP 7052 100Kg, ammonium polyphosphate 24Kg, micro encapsulation three-(2, the 3-dibromopropyl) chlorinated isocyanurates 14.4Kg, trimeric cyanamide 9.6Kg;
After compound flame retardant and Vestolen PP 7052 take by weighing by weight, put into impeller at rotating speed
1200Commentaries on classics/min, the maximum LV that stirs
15Under the condition of meter per second, mixed 7 minutes, extruding pelletization in twin screw extruder then, extrusion temperature is 185～190 ℃, makes sample 3.
Embodiment four
Ingredients by weight consists of:
Vestolen PP 7052 100Kg, ammonium polyphosphate 25Kg, micro encapsulation three-(2, the 3-dibromopropyl) chlorinated isocyanurates 13Kg, trimeric cyanamide 12Kg;
After compound flame retardant and Vestolen PP 7052 take by weighing by weight; Put into impeller under the condition of rotating speed 1200 commentaries on classics/min, maximum stirring LV 18 meter per seconds, mixed 4 minutes, then extruding pelletization in twin screw extruder; Extrusion temperature is 185～190 ℃, makes sample 4.
Embodiment five
Ingredients by weight consists of:
Vestolen PP 7052 100Kg, ammonium polyphosphate 23Kg, micro encapsulation three-(2, the 3-dibromopropyl) chlorinated isocyanurates 9.5Kg, trimeric cyanamide 13.5Kg;
After compound flame retardant and Vestolen PP 7052 take by weighing by weight; Put into impeller under the condition of rotating speed 1800 commentaries on classics/min, maximum stirring LV 20 meter per seconds, mixed 10 minutes, then extruding pelletization in twin screw extruder; Extrusion temperature is 180～190 ℃, makes sample 5.
Embodiment six
Ingredients by weight consists of:
Vestolen PP 7052 100Kg, ammonium polyphosphate 24.5Kg, micro encapsulation three-(2, the 3-dibromopropyl) chlorinated isocyanurates 11.3Kg, trimeric cyanamide 13.2Kg;
After compound flame retardant and Vestolen PP 7052 take by weighing by weight; Put into impeller under the condition of rotating speed 1500 commentaries on classics/min, maximum stirring LV 16 meter per seconds, mixed 6 minutes, then extruding pelletization in twin screw extruder; Extrusion temperature is 182～190 ℃, makes sample 6.
The result that six groups of above-mentioned samples carry out Performance Detection is as shown in table 1:
Table 1: the detection data that the flame-retardant polypropelene product is detected.
Visible by The above results, anti-flaming polypropylene material property of the present invention is reliable and stable, meets country and industry standard.And have significant lifting, obtained unexpected technique effect.And remain the very simple production technique of employing, and it is composite only to utilize several kinds of fire retardants commonly used to carry out simultaneously, so save cost greatly, the product price ratio is high, is convenient to large-scale promotion application.
Claims (5)
1. 850 ℃ of nonflammable PP composite materials of a glowing filament comprise by weight: 100 parts of Vestolen PP 7052,45～50 parts of compound flame retardants; Wherein compound flame retardant is made up of following composition by weight: 100 parts of ammonium polyphosphates, micro encapsulation three-(2, the 3-dibromopropyl) 40～60 parts of chlorinated isocyanurates, 40～60 parts of trimeric cyanamides.
2. 850 ℃ of nonflammable PP composite materials of glowing filament according to claim 1; It is characterized in that: described compound flame retardant is made up of following composition by weight: 100 parts of ammonium polyphosphates, micro encapsulation three-(2, the 3-dibromopropyl) 43～55 parts of chlorinated isocyanurates, 43～55 parts of trimeric cyanamides.
3. method of producing claim 1 or 2 described PP composite materials, step comprises: at first take by weighing Vestolen PP 7052, ammonium polyphosphate by formula rate, micro encapsulation three-(2, the 3-dibromopropyl) chlorinated isocyanurates, trimeric cyanamide, raw materials mix is even; Granulation then, extrusion temperature are 180-190 ℃.
4. the working method of PP composite material according to claim 3; It is characterized in that: described mixing process is to use the impeller mixing to carry out; The stirrer rotating speed is more than or equal to 650 commentaries on classics/min, maximum LV 20 meter per seconds that stir, and mixing time is 4 to 10 minutes.
5. according to the working method of claim 3 or 4 described PP composite materials, it is characterized in that: described mixed material is used the twin screw extruder extruding pelletization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110304170 CN102336970B (en) | 2011-09-30 | 2011-09-30 | Polypropylene composite material incombustible for 850 DEG C glowing filament and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110304170 CN102336970B (en) | 2011-09-30 | 2011-09-30 | Polypropylene composite material incombustible for 850 DEG C glowing filament and production method thereof |
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| CN102336970B CN102336970B (en) | 2013-01-30 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040138351A1 (en) * | 2002-11-04 | 2004-07-15 | Nikolas Kaprinidis | Flame retardant compositions |
| CN101550249A (en) * | 2008-04-02 | 2009-10-07 | 上海化工研究院 | Halogen-free expandable fire retardant fiber glass reinforced polypropylene material and preparation method thereof |
| CN102146596A (en) * | 2011-05-11 | 2011-08-10 | 四川大学 | Preparation method for halogen-free flame-retardant polypropylene fibers |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040138351A1 (en) * | 2002-11-04 | 2004-07-15 | Nikolas Kaprinidis | Flame retardant compositions |
| CN101550249A (en) * | 2008-04-02 | 2009-10-07 | 上海化工研究院 | Halogen-free expandable fire retardant fiber glass reinforced polypropylene material and preparation method thereof |
| CN102146596A (en) * | 2011-05-11 | 2011-08-10 | 四川大学 | Preparation method for halogen-free flame-retardant polypropylene fibers |
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