CN104194145B - A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant and preparation method thereof - Google Patents
A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant and preparation method thereof Download PDFInfo
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- CN104194145B CN104194145B CN201410380116.2A CN201410380116A CN104194145B CN 104194145 B CN104194145 B CN 104194145B CN 201410380116 A CN201410380116 A CN 201410380116A CN 104194145 B CN104194145 B CN 104194145B
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- 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
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Abstract
A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant and preparation method thereof, raw material is made up of 66 parts of polypropylene matrixs, 20 parts of halogen-free expanded flame-retardant agent, 2 parts of conductive fillers, 1 ~ 3 part of nano modification particle, 1 ~ 3 part of additive, 5 parts of compatilizers, 1 part of antioxidant and 2 parts of lubricants.Preparation method is: use high-speed mixer by polypropylene matrix, compatilizer, antioxidant and mix lubricant uniformly after, compound is put into accurate mill, after material melts to be mixed, adds halogen-free expanded flame-retardant agent and conductive filler melting mixing；Add nano modification particle and additive the most again, mix in accurate mill, obtain this polypropylene.The present invention uses nano modification particle and hollow glass micropearl as fire retarding synergist, it is possible to increase polyacrylic fire resistance；But also the viscosity of polyacrylic polymer melt can be significantly reduced, improve its processing characteristics, improve its heat stability high；Color inhibition ability is excellent, and impact resistance, bending strength is good.
Description
Technical field
The present invention relates to polypropylene field, a kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant and preparation method thereof.
Background technology
According to " polymer combustion and flame-retarded technology " (Zhang Jun, Ji Kuijiang, Xia Yan cause etc. is write, Interpharm Press, in April, 2005) to introduce, polypropylene itself belongs to combustible material, its oxygen index (OI) is only 17.0 ~ 18.0%, and charring rate is low, during burning, it is easily generated molten drop, so being desirable that in a lot of application scenarios and carrying out flame-retardant modified to it.The most both at home and abroad polypropylene fire retardant is mainly used interpolation fire retardant.Halogen containing flame-retardant is big due to the amount of being fuming, and the hydrogen halide discharged has corrosivity, and a lot of countries have prohibitted the use of.
Introduce according to " advanced polymer processing techniques " (Polymers for Advanced Technologies21:1-26,2009), with and can be used in the Halogen additive flame retardant of polypropylene flame redardant, most have future in engineering applications is expansion type flame retardant.Expansion type flame retardant is phosphorus-nitrogen containing compound mostly, mainly plays fire retardation by forming porous foam layer of charcoal at condensed phase.At present, generally use a kind of synergist and expansion type flame retardant compositional flame-retardant polypropylene, improve the flame retarding efficiency of expansion type flame retardant further.But after fire retardant adds, usually make the mechanical property of compound system decline, it is difficult to meet some occasions having demand in flame retardant area to mechanics.Meanwhile, conventional halogen-free flame retardants price is higher, causes the price of polypropylene finished product to increase, how reduce cost, fire-retardant meet in the case of, promoting its mechanical property is the problem that polypropylene field needs to solve.
Summary of the invention
It is an object of the invention to overcome the problem that in prior art, polypropylene flame redardant mechanical property is low, a kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant and preparation method thereof is provided, by adding nano modification particle and additive, improve polyacrylic impact resistance and bending strength, improve its mechanical property.
The technical scheme that the present invention is used for achieving the above object is: a kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant, by polypropylene matrix, halogen-free expanded flame-retardant agent, conductive filler, additive, nano modification particle, compatilizer, antioxidant and lubricant composition, the parts by weight of each component are followed successively by: polypropylene matrix 66 parts, halogen-free expanded flame-retardant agent 20 parts, conductive filler 2 parts, 1 ~ 3 part of nano modification particle, additive 1 ~ 3 part, compatilizer 5 parts, antioxidant 1 part and lubricant 2 parts, described conductive filler is white carbon black, described additive is hollow glass micropearl, described nano modification particle is by the silane coupler that weight ratio is 1:100 and Nano-meter SiO_22Mix.
In the present invention, polypropylene matrix is high shock resistance type polypropylene；Halogen-free expanded flame-retardant agent is phosphorus nitrogen fire-retardant agent, and its phosphorus content is 0 ~ 24%, and nitrogen content is 0 ~ 22%, and particle diameter is 2 ~ 10um.
In the present invention, the particle diameter of white carbon black is 15nm, and the particle diameter of nano modification particle is 10 ~ 40nm.
Compatilizer of the present invention, antioxidant and lubricant are commercially available known material, and the compatilizer that the present invention uses is maleic anhydride inoculated polypropylene, and antioxidant is phosphite ester kind antioxidant, and lubricant is dimethicone.
A kind of preparation method of nanometer modified environment-friendly halogen-free polypropylene flame redardant, use high-speed mixer by polypropylene matrix, compatilizer, antioxidant and mix lubricant uniformly after, compound is put into accurate mill, add halogen-free expanded flame-retardant agent after material melts to be mixed, after melting uniformly, add cooperative flame retardant conductive filler melting mixing again；Add nano modification mix particles the most again；Then hollow glass micropearl is added, mix in accurate mill, obtain nanometer modified environment-friendly halogen-free flame-proof antistatic polypropylene.Concrete preparation process is: step one, by silane coupler and Nano-meter SiO_22Mix by the weight ratio of 1:100, prepare nano modification particle A, standby；
Step 2, by weight, takes 66 parts of polypropylene matrixs, 5 parts of compatilizers, 1 part of antioxidant and 2 parts of lubricant mix homogeneously in high-speed mixer respectively, obtains prepared mixture B, standby；
Step 3, the mixture B that step 2 prepares is put in the mill that internal temperature is 160 ~ 170 DEG C and carries out melt blending, the rotating speed controlling mill is 20 ~ 40r/min, after melt blending 1 ~ 3min, 20 parts of halogen-free expanded flame-retardant agent are added on the basis of keeping mill internal temperature and rotating speed, melt blending 2 ~ 7min, prepares mixture C；
Adding 2 parts of white carbon blacks in step 4, mixture C in mill, on the basis of keeping mill internal temperature, changing its rotating speed is 15 ~ 35r/min, melt blending 3 ~ 6min, prepares mixture D；
Step 5, mixture D in mill are added the nano modification particle A that 1 ~ 3 part of step one prepares, the temperature set according to step 3 mill and rotating speed, melt blending 3 ~ 6min, prepares mixture E；
Step 6, mixture E in mill are added temperature and rotating speed that 1 ~ 3 part of hollow glass micropearl sets according to step 3 mill, melt blending 2 ~ 8min, prepared halogen-free polypropylene flame redardant.
Nano modification particle and the introducing of hollow glass micropearl, it is possible to completely cutting off the transmission between material in polypropylene, fire-retardant synergisticing performance is good.Wherein, nano modification particle can space between filling glass cenosphere, enhance the compactness of compositions so that gas can not free in and out, heat cannot free exchange, improve prepared polyacrylic fire resistance.
The chemical analysis of hollow glass micropearl and percentage composition thereof be: SiO255~65%、Al2O326~35%、MgO1~2%、Fe2O30.2~1%、TiO20.5~2%、Na2O and K2O0.5 ~ 4%, C0.01 ~ 2%, particle diameter is 1 ~ 50 micron, is the closing microsphere of a kind of light weight, and being full of in the internal cavity of its hollow has CO2Deng gas, can promote that layer of charcoal is formed, and then play effect that is heat insulation and that slow down imflammable gas effusion, have light weight, low heat conduction, nontoxic, do not fire, chemical stability is good and the advantage such as high dispersive.Silane coupler is to Nano-meter SiO_22Surface process, it is possible to avoid Nano-meter SiO_22Reunite, make hollow glass micropearl and Nano-meter SiO_22It is uniformly dispersed.
In polypropylene matrix, add the nano silicon of modification, have therebetween good affinity and Physical interaction；Nano silicon has big specific surface area；Nano silicon has heterogeneous nucleating effect to polypropylene matrix simultaneously, and adding a small amount of nano silicon, i.e. to may result in acrylic sphere crystalline substance granule tiny, uniform, and along with nanometer titanium dioxide silicone content improves, then the nucleus formed is the most, and spherulite size is the least.Therefore, nano silicon can improve polyacrylic tensile property and elastic modelling quantity, and the mechanical property of composite increases.
When adding hollow glass micropearl in PP/Nano silicon dioxide composite material, trickle due to its particle of hollow glass micropearl, volume is little, specific surface area is big, thus big with composite contact area, when material is by External Force Acting, hollow glass micropearl particle be stressed in the material deform upon, destruction etc., thus apparatus with shock absorbing, improve impact property；Meanwhile, hollow glass micropearl also has the effect of crystal grain thinning.Therefore, on the basis of the original mechanical property of PP/Nano silicon dioxide composite material, add hollow glass micropearl and can improve the mechanical property of composite further.Furthermore, add a certain amount of hollow glass micropearl in the composite, due to " ball effect ", the mobility of material melt can be improved, improve owing to adding the impact that nano silicon brings to Composite Melt viscosity, the beneficially processing of actual production.
Beneficial effect: 1, nano modification silicon dioxide has heterogeneous nucleating effect to polypropylene matrix, polyacrylic tensile property and elastic modelling quantity can be improved, when adding hollow glass micropearl in PP/Nano silicon dioxide composite material, silane coupler can make to obtain nano modification silicon dioxide and modified hollow glass micropearl in material, modified hollow glass micropearl is uniformly dispersed in the base, material about is equivalent to embedded at homodisperse modified hollow glass micropearl particle periphery have good interface combination and certain thickness compliant interface phase, so that crazing can be caused in time being damaged at material, terminate fracture propagation, under certain morphosis, cause the shear yielding of matrix simultaneously, thus consume substantial amounts of impact energy, can preferably transmit again born external force, reach not only to strengthen but also toughness reinforcing purpose；
2, the present invention uses nano modification particle and hollow glass micropearl as fire retarding synergist, the transmission between material in polypropylene can be completely cut off, the two cooperative effect in polypropylene flame redardant, polyacrylic fire resistance can be significantly improved, can preferably reduce HRR, meanwhile, also have and certain press down cigarette effect；But also the viscosity of polyacrylic polymer melt can be significantly reduced, improve its processing characteristics, improve its heat stability high；Color inhibition ability is excellent, and impact resistance, bending strength is good；
3, the present invention uses nano carbon black as cooperative flame retardant conductive filler, and it has fire-retardant and electric conductivity, the beneficially carbon-coating of polypropene composition System forming compacted mass, and face crack is few, good to the barriering effect of heat and oxygen, has certain smoke elimination effect.Because white carbon black is nanoscale, it is simple to disperseing in Polypropylene compositions objects system, the polypropylene antistatic making the present invention prepare is respond well；
4, preparation technology is easy, and used material is cheap, and it is more obvious that integrated cost compares to traditional polypropylene flame redardant advantage, the nanometer modified environment-friendly halogen-free flame-proof antistatic polypropylene superior flame retardant property produced.The present invention uses multiple halogen-free material as fire retarding synergist so that the properties of product of the present invention is improved, and the fire retardant of present invention employing and synergist are Halogen product, compare environmental protection, and environmental pollution is little；Meanwhile, the cooperative flame retardant conductive filler used and additive etc. are cheap, instead of the proportion of halogen-free flame retardants, reduce the holistic cost of system, and the cost advantage of the present invention is obvious.
Detailed description of the invention
A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant, by polypropylene matrix, halogen-free expanded flame-retardant agent, conductive filler, additive, nano modification particle, compatilizer, antioxidant and lubricant composition, the parts by weight of each component are followed successively by: polypropylene matrix 66 parts, halogen-free expanded flame-retardant agent 20 parts, conductive filler 2 parts, 1 ~ 3 part of nano modification particle, additive 1 ~ 3 part, compatilizer 5 parts, antioxidant 1 part and lubricant 2 parts, described conductive filler is white carbon black, described additive is hollow glass micropearl, described nano modification particle is by the silane coupler that weight ratio is 1:100 and Nano-meter SiO_22Mix.
Wherein, the particle diameter of white carbon black is 15nm, and the particle diameter of nano modification particle is 10 ~ 40nm.
A kind of preparation method of nanometer modified environment-friendly halogen-free polypropylene flame redardant, use high-speed mixer by high shock resistance type polypropylene, compatilizer, antioxidant and mix lubricant uniformly after, compound is put into accurate mill, add halogen-free expanded flame-retardant agent after material melts to be mixed, after melting uniformly, add cooperative flame retardant conductive filler melting mixing again；Add nano modification mix particles the most again；Then hollow glass micropearl is added, mix in accurate mill, obtain nanometer modified environment-friendly halogen-free flame-proof antistatic polypropylene.
Embodiment 1
A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant, it is made up of polypropylene matrix, halogen-free expanded flame-retardant agent, cooperative flame retardant conductive filler, additive and nano modification particle, compatilizer, antioxidant, lubricant, by weight meter: described polypropylene matrix is made up of 66 parts of high shock resistance type polypropylene；Described halogen-free expanded flame-retardant agent is 20 parts of phosphorus nitrogen fire-retardant agent；Described cooperative flame retardant conductive filler be 2 parts of particle diameters be the white carbon black of 15nm；Described additive be 3 parts of particle diameters be the hollow glass micropearl of 1 ~ 50 micron；Described nano modification particle is 1 part of Nano-meter SiO_2 through KH550 modification2, KH550 and Nano-meter SiO_22Weight ratio be 1:100；Described compatilizer is 5 parts of maleic anhydride inoculated polypropylenes；Described antioxidant is 1 part of phosphite ester kind antioxidant；Described lubricant is 2 parts of dimethicones.Wherein, the particle diameter of nano modification particle is 10 ~ 40nm.
The concrete preparation process of nanometer modified environment-friendly halogen-free polypropylene flame redardant is: step one, by KH550 and Nano-meter SiO_22Mix by the weight ratio of 1:100, prepare nano modification particle A, standby；
Step 2, take 66 parts of high shock resistance type polypropylene, 5 parts of maleic anhydride inoculated polypropylenes, 1 part of phosphite ester kind antioxidant, 2 parts of dimethicone mix homogeneously in high-speed mixer, obtain mixture B, standby；
Step 3, being put into by mixture B in accurate mill so that it is melting mixing is uniform, control temperature at 170 DEG C, rotating speed is 30r/min, melt blending 3min；Adding 20 parts of phosphorus nitrogen fire-retardant agent on the basis of keeping mill internal temperature and rotating speed so that it is melting mixing is uniform, melt blending 5min obtains mixture C；
Adding 2 parts of white carbon blacks in step 4, mixture C in mill, on the basis of keeping mill internal temperature, changing its rotating speed is 35r/min, melt blending 5min, prepares mixture D；
Step 5, mixture D in mill are added the nano modification particle A that 1 part of step one prepares, the temperature set according to step 3 mill and rotating speed, melt blending 5min, prepares mixture E；
Step 6, mixture E in mill are added temperature and rotating speed that 3 parts of hollow glass micropearls set according to step 3 mill, melt blending 8min, prepared halogen-free polypropylene flame redardant.
Embodiment 2
A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant, is the hollow glass micropearl of 1 ~ 50 micron, 2 parts of Nano-meter SiO_2 through KH550 modification by 66 parts of high shock resistance type polypropylene, 2 parts of nano carbon blacks, 20 parts of halogen-free expanded flame-retardant agent, 2 parts of particle diameters2, 5 parts of maleic anhydride inoculated polypropylenes, 1 part of phosphite ester kind antioxidant and 2 parts of dimethicones compositions；Wherein, the particle diameter of white carbon black is 15nm, and the particle diameter of nano modification particle is 10 ~ 40nm；Halogen-free expanded flame-retardant agent is phosphorus nitrogen fire-retardant agent, and its phosphorus content is 0 ~ 24%, and nitrogen content is 0 ~ 22%, and particle diameter is 2 ~ 10um.
The concrete preparation process of a kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant is: step one, by KH550 and Nano-meter SiO_22Mix by the weight ratio of 1:100, prepare nano modification particle A, standby；
Step 2, take 66 parts of high shock resistance type polypropylene, 5 parts of maleic anhydride inoculated polypropylenes, 1 part of phosphite ester kind antioxidant, 2 parts of dimethicone mix homogeneously in high-speed mixer, obtain mixture B, standby；
Step 3, being put into by mixture B in accurate mill so that it is melting mixing is uniform, control temperature at 170 DEG C, rotating speed is 40r/min, melt blending 2min；Adding 20 parts of phosphorus nitrogen fire-retardant agent on the basis of keeping mill internal temperature and rotating speed so that it is melting mixing is uniform, melt blending 7min obtains mixture C；
Adding 2 parts of white carbon blacks in step 4, mixture C in mill, on the basis of keeping mill internal temperature, changing its rotating speed is 20r/min, melt blending 6min, prepares mixture D；
Step 5, mixture D in mill are added the nano modification particle A that 2 parts of steps one prepare, the temperature set according to step 3 mill and rotating speed, melt blending 6min, prepares mixture E；
Step 6, mixture E in mill are added temperature and rotating speed that 2 parts of hollow glass micropearls set according to step 3 mill, melt blending 6min, prepared halogen-free polypropylene flame redardant.
Embodiment 3
A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant, is the hollow glass micropearl of 1 ~ 50 micron, 3 parts of Nano-meter SiO_2 through KH550 modification by 66 parts of high shock resistance type polypropylene, 2 parts of nano carbon blacks, 20 parts of halogen-free expanded flame-retardant agent, 1 part of particle diameter2, 5 parts of maleic anhydride inoculated polypropylenes, 1 part of phosphite ester kind antioxidant and 2 parts of dimethicones compositions；Wherein, the particle diameter of white carbon black is 15nm, and the particle diameter of nano modification particle is 10 ~ 40nm；Halogen-free expanded flame-retardant agent is phosphorus nitrogen fire-retardant agent, and its phosphorus content is 0 ~ 24%, and nitrogen content is 0 ~ 22%, and particle diameter is 2 ~ 10um.
The concrete preparation process of a kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant is: step one, by KH550 and Nano-meter SiO_22Mix by the weight ratio of 1:100, prepare nano modification particle A, standby；
Step 2, take 66 parts of high shock resistance type polypropylene, 5 parts of maleic anhydride inoculated polypropylenes, 1 part of phosphite ester kind antioxidant, 2 parts of dimethicone mix homogeneously in high-speed mixer, obtain mixture B, standby；
Step 3, being put into by mixture B in accurate mill so that it is melting mixing is uniform, control temperature at 170 DEG C, rotating speed is 30r/min, melt blending 3min；Adding 20 parts of phosphorus nitrogen fire-retardant agent on the basis of keeping mill internal temperature and rotating speed so that it is melting mixing is uniform, melt blending 5min obtains mixture C；
Adding 2 parts of white carbon blacks in step 4, mixture C in mill, on the basis of keeping mill internal temperature, changing its rotating speed is 35r/min, melt blending 5min, prepares mixture D；
Step 5, mixture D in mill are added the nano modification particle A that 3 parts of steps one prepare, the temperature set according to step 3 mill and rotating speed, melt blending 5min, prepares mixture E；
Step 6, mixture E in mill are added temperature and rotating speed that 1 part of hollow glass micropearl sets according to step 3 mill, melt blending 8min, prepared halogen-free polypropylene flame redardant.
The crystallite that nano carbon black is has meta anthracite structure, be a kind of average diameter be the spherical or chain particles aggregate thing of 2～3nm, there is fire-retardant and electric conductivity, it is considered that, carbon black filled composite has conduction band, tunnel-effect and three kinds of electrical conduction mechanisms of field emission.Under the low amount of filling out, low-voltage, carbon black particle surface electric field intensity is generally less than 106 V/cm, and the conduction of tunnel-effect plays a major role；Under the low amount of filling out, high voltage, carbon black particle surface electric field intensity is generally higher than 107 V/cm, and field emission conduction becomes more notable；When high loading, carbon black concentration increases, and can form a large amount of conductive channel, and at this moment conduction band effect becomes apparent from.In the present invention, the electrical property of carbon black filled Polypropylene compositions objects system is these three kinds of coefficient results of mechanism.
The polyacrylic the performance test results that table 1 prepares for the present invention
From the relative analysis of above-mentioned table 1,1 ~ 3 part of nano modification particle and 1 ~ 3 part of additive can make the halogen-free polypropylene flame redardant prepared have higher bending strength and hot strength, the halogen-free polypropylene flame redardant that embodiment 1 ~ 3 prepares is respectively provided with higher mechanical property, and has best performance when 3 parts of nano modification particles that embodiment 3 is recorded and 1 part of additive.The flame-retardant polypropylene composite material developed according to above-mentioned formula and technique compared with prior art, has the excellent flame retardant effect of comparison and higher comprehensive mechanical property.This material can be widely applied to the field such as auto parts machinery, household electrical appliance.
It is an advantage of the current invention that: utilize flame-retardant conductive and nano silicon, the synergistic fire retardation of hollow glass micropearl of white carbon black, make use of hollow glass micropearl can improve the mobility of material melt simultaneously, improve owing to adding nano silicon, and the impact brought to Composite Melt viscosity, thus obtained the polypropylene material of color inhibition, impact resistance, good in thermal property, environmental protection, halogen-free flameproof and dimensionally stable, it is suitable for the fields such as all kinds of automobile-used, household electrical appliance of injection mo(u)lding.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, on the premise of without departing from the inventive method; can also make some improvement and supplement, these improve and supplement and also should be regarded as protection scope of the present invention.
Claims (5)
1. a nanometer modified environment-friendly halogen-free polypropylene flame redardant, it is characterized in that: by polypropylene matrix, halogen-free expanded flame-retardant agent, conductive filler, additive, nano modification particle, compatilizer, antioxidant and lubricant composition, the parts by weight of each component are followed successively by: polypropylene matrix 66 parts, halogen-free expanded flame-retardant agent 20 parts, conductive filler 2 parts, 1 ~ 3 part of nano modification particle, additive 1 ~ 3 part, compatilizer 5 parts, antioxidant 1 part and lubricant 2 parts, described conductive filler is white carbon black, described additive is hollow glass micropearl, the particle diameter of hollow glass micropearl is 1 ~ 50 micron, described nano modification particle is by the silane coupler that weight ratio is 1:100 and Nano-meter SiO_22Mixing, described polypropylene matrix is high shock resistance type polypropylene, and described halogen-free expanded flame-retardant agent is phosphorus nitrogen fire-retardant agent, its phosphorus content is 0 ~ 24%, and nitrogen content is 0 ~ 22%, and particle diameter is 2 ~ 10 μm, the particle diameter of described white carbon black is 15nm, and the particle diameter of nano modification particle is 10 ~ 40nm.
A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant the most according to claim 1, it is characterised in that: described compatilizer is maleic anhydride inoculated polypropylene.
A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant the most according to claim 1, it is characterised in that: described antioxidant is phosphite ester kind antioxidant.
A kind of nanometer modified environment-friendly halogen-free polypropylene flame redardant the most according to claim 1, it is characterised in that: described lubricant is dimethicone.
5. the method preparing nanometer modified environment-friendly halogen-free polypropylene flame redardant as claimed in claim 1, it is characterised in that comprise the following steps:
Step one, by silane coupler and Nano-meter SiO_22Mix by the weight ratio of 1:100, prepare nano modification particle A, standby；
Step 2, by weight, takes 66 parts of polypropylene matrixs, 5 parts of compatilizers, 1 part of antioxidant and 2 parts of lubricant mix homogeneously in high-speed mixer respectively, obtains prepared mixture B, standby；
Step 3, the mixture B that step 2 prepares is put in the mill that internal temperature is 160 ~ 170 DEG C and carries out melt blending, the rotating speed controlling mill is 20 ~ 40r/min, after melt blending 1 ~ 3min, 20 parts of halogen-free expanded flame-retardant agent are added on the basis of keeping mill internal temperature and rotating speed, melt blending 2 ~ 7min, prepares mixture C；
Adding 2 parts of white carbon blacks in step 4, mixture C in mill, on the basis of keeping mill internal temperature, changing its rotating speed is 15 ~ 35r/min, melt blending 3 ~ 6min, prepares mixture D；
Step 5, mixture D in mill are added the nano modification particle A that 1 ~ 3 part of step one prepares, the temperature set according to step 3 mill and rotating speed, melt blending 3 ~ 6min, prepares mixture E；
Step 6, mixture E in mill are added temperature and rotating speed that 1 ~ 3 part of hollow glass micropearl sets according to step 3 mill, melt blending 2 ~ 8min, prepared halogen-free polypropylene flame redardant.
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| CN103923369A (en) * | 2013-01-15 | 2014-07-16 | 神华集团有限责任公司 | Halogen-free polyolefin composition and product thereof |
-
2014
- 2014-08-04 CN CN201410380116.2A patent/CN104194145B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372869A (en) * | 2011-10-28 | 2012-03-14 | 泰安现代塑料有限公司 | Halogen-free flame retardant plastic geotechnical grille master batch for mine |
| CN103923369A (en) * | 2013-01-15 | 2014-07-16 | 神华集团有限责任公司 | Halogen-free polyolefin composition and product thereof |
| CN103421240A (en) * | 2013-07-19 | 2013-12-04 | 福建恒盛管业有限公司 | Square single-wall corrugated pipe material for electric power |
Non-Patent Citations (1)
| Title |
|---|
| 白炭黑改性膨胀阻燃剂对PP/POE燃烧及力学性能的影响;黄承焕等;《塑料科技》;20111130;第39卷(第11期);46-50 * |
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| CN104194145A (en) | 2014-12-10 |
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