CN102336970B - 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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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 plastic flame field, be specifically related to 850 ℃ of nonflammable polypropylene composite material of a kind of glowing filament, namely a kind of polypropylene composite material of flame retardant type.
Background technology
Material glowing filament fire retardancy test is mainly used in simulating the thermal stresses that the thermal source such as glow element or overload resistance or ignition source cause at short notice, with simulation technique evaluation ignition hazard, 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 Intumescent Retardant System, although these flame-retarded technologies can be accomplished good vertical combustion grade, such as 0.8mm, V-0.But the inflammable gas of material production and contacting of oxygen when applying because not intercepting the high temperature glowing filament 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 such as 850 ℃ of glowing filaments.
Summary of the invention
Purpose of the present 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 invention provides the production method of this flame-retardant polypropelene matrix material.
The present invention is achieved by the following technical solutions: 850 ℃ of nonflammable polypropylene composite material of a kind of glowing filament comprise by weight: 100 parts of polypropylene, 45～50 parts of compound flame retardants; Wherein compound flame retardant is made of following composition by weight: 100 parts of ammonium polyphosphates, micro encapsulation three-40～60 parts of (2,3-dibromopropyl) 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 generate density greatly and can stay in for a long time the bromo-phosphonium in glowing filament application point district with the ammonium polyphosphate reaction, thereby form powerful gas phase sealing coat.In addition, trimeric cyanamide plays a part whipping agent and coke toughener, and ammonium polyphosphate then is the catalyzer of coking, 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 polypropylene composite material obtain strong gas phase and intercept, and also has strong solid phase to intercept simultaneously, and effectively barrier material is subjected to 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 ripe conventional products, and cost is lower, and the product cost performance is high.Being convenient to large-scale promotion uses.
Further preferred prescription is: described compound flame retardant is made of following composition by weight: 100 parts of ammonium polyphosphates, micro encapsulation three-43～55 parts of (2,3-dibromopropyl) chlorinated isocyanurates, 43～55 parts of trimeric cyanamides.The flame retardant properties of product is best like this.
Correspondingly, the production method of 850 ℃ of nonflammable polypropylene composite material of a kind of glowing filament is: at first take by weighing polypropylene, ammonium polyphosphate by formula rate, micro encapsulation three-(2,3-dibromopropyl) chlorinated isocyanurates, trimeric cyanamide mix raw material; Then granulation, extrusion temperature are 180-190 ℃.Such method is convenient to accurate dosing, and the technology and step that uses simultaneously all is conventional equipment and process, and is 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 production method is: described mixing process is to use homogenizer to carry out, and the stirrer rotating speed is more than or equal to 650 turning/min, maximum linear velocity 20 meter per seconds that stir, and mixing time is 4 to 10 minutes.Namely higher mixing speed should be arranged, simultaneously, because the blade outer end linear velocity of stirring rake is maximum, in the situation that rotating speed is 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 the structural strength requirement to whipping device, reduce equipment cost.
Described mixed material 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 the structure of twin screw extruder determines, in fact forcing machine is exactly that intermediate stations technological temperature technological temperature the highest, the input and output material position is lower.Correspondingly, for the controlled working 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 the more detailed understanding using method of the present invention of those skilled in the art and technique effect, provide following examples and the corresponding data that detect.
Embodiment one
Ingredients by weight consists of:
Polypropylene 100Kg, ammonium polyphosphate 23.5Kg, micro encapsulation three-(2,3-dibromopropyl) chlorinated isocyanurates 11.75Kg, trimeric cyanamide 11.75Kg;
After compound flame retardant and polypropylene take by weighing by weight, put into homogenizer to turn at rotating speed 650/min, under the maximum condition that stirs linear velocity 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:
Polypropylene 100Kg, ammonium polyphosphate 22.5Kg, micro encapsulation three-(2,3-dibromopropyl) chlorinated isocyanurates 9Kg, trimeric cyanamide 13.5Kg;
After compound flame retardant and polypropylene take by weighing by weight, put into homogenizer to turn at rotating speed 750/min, the maximum linear velocity 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:
Polypropylene 100Kg, ammonium polyphosphate 24Kg, micro encapsulation three-(2,3-dibromopropyl) chlorinated isocyanurates 14.4Kg, trimeric cyanamide 9.6Kg;
After compound flame retardant and polypropylene take by weighing by weight, put into homogenizer at rotating speed
1200Turn/min, the maximum linear velocity 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:
Polypropylene 100Kg, ammonium polyphosphate 25Kg, micro encapsulation three-(2,3-dibromopropyl) chlorinated isocyanurates 13Kg, trimeric cyanamide 12Kg;
After compound flame retardant and polypropylene take by weighing by weight, put into homogenizer to turn at rotating speed 1200/min, under the maximum condition that stirs linear velocity 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:
Polypropylene 100Kg, ammonium polyphosphate 23Kg, micro encapsulation three-(2,3-dibromopropyl) chlorinated isocyanurates 9.5Kg, trimeric cyanamide 13.5Kg;
After compound flame retardant and polypropylene take by weighing by weight, put into homogenizer to turn at rotating speed 1800/min, under the maximum condition that stirs linear velocity 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:
Polypropylene 100Kg, ammonium polyphosphate 24.5Kg, micro encapsulation three-(2,3-dibromopropyl) chlorinated isocyanurates 11.3Kg, trimeric cyanamide 13.2Kg;
After compound flame retardant and polypropylene take by weighing by weight, put into homogenizer to turn at rotating speed 1500/min, under the maximum condition that stirs linear velocity 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.
By the above results as seen, 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 only utilize several fire retardants commonly used to carry out simultaneously composite, so greatly save cost, the product cost performance is high, is convenient to large-scale promotion application.
Claims (5)
1. 850 ℃ of nonflammable polypropylene composite material of a glowing filament comprise by weight: 100 parts of polypropylene, 45～50 parts of compound flame retardants; Wherein compound flame retardant is made of following composition by weight: 100 parts of ammonium polyphosphates, micro encapsulation three-40～60 parts of (2,3-dibromopropyl) chlorinated isocyanurates, 40～60 parts of trimeric cyanamides.
2. 850 ℃ of nonflammable polypropylene composite material of glowing filament according to claim 1, it is characterized in that: described compound flame retardant is made of following composition by weight: 100 parts of ammonium polyphosphates, micro encapsulation three-43～55 parts of (2,3-dibromopropyl) chlorinated isocyanurates, 43～55 parts of trimeric cyanamides.
3. method of producing claim 1 or 2 described polypropylene composite material, step comprises: at first take by weighing polypropylene, ammonium polyphosphate by formula rate, micro encapsulation three-(2,3-dibromopropyl) chlorinated isocyanurates, trimeric cyanamide mix raw material; Then granulation, extrusion temperature are 180-190 ℃.
4. the production method of polypropylene composite material according to claim 3, it is characterized in that: described mixing process uses the homogenizer mixing to carry out, the stirrer rotating speed is more than or equal to 650 turning/min, maximum linear velocity 20 meter per seconds that stir, and mixing time is 4 to 10 minutes.
5. it is characterized in that: described mixed material twin screw extruder extruding pelletization according to claim 3 or the production method of 4 described polypropylene composite material.
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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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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| US7138448B2 (en) * | 2002-11-04 | 2006-11-21 | Ciba Specialty Chemicals Corporation | Flame retardant compositions |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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