CN112679855A - 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material and preparation method thereof - Google Patents
5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material and preparation method thereof Download PDFInfo
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Abstract
The invention provides a 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material and a preparation method thereof, wherein the composite material comprises the following components: 65-97 parts of low-dielectric polypropylene resin; 1-10 parts of efficient phosphorus flame retardant; 1-10 parts of low-dielectric hollow micro powder. The high-efficiency phosphorus flame retardant plays roles in gas phase and condensed phase flame retardance in the combustion process, phosphorus-containing organic free radicals neutralize free radicals generated by decomposition of polypropylene to play roles in gas phase flame retardance, glassy molten phosphate effectively blocks permeation of heat and combustible gas, polyphosphoric acid generated by decomposition has a dehydration and carbonization role, and condensed phase flame retardance is played; the water vapor produced by combustion absorbs a large amount of heat, thereby reducing the combustion temperature and the heat release rate.
Description
Technical Field
The invention relates to the technical field of polypropylene composite materials, in particular to a low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material for 5G and a preparation method thereof.
Background
The 5G communication is close to the millimeter wave band, the maximum advantage is high transmission speed, and the biggest disadvantage brought by the same is poor penetration force, large attenuation and low dielectric constant and dielectric loss of a transmission medium material. Compared with inorganic non-metal materials, high polymer materials, especially common polyolefin materials, have the advantages of low dielectric constant, light weight, low price and the like.
High 5G communication frequency causes large heating of components, and higher requirements on heat resistance and flame retardance of the material are provided. The polypropylene material has the advantages of high flame retardance and high flame retardance difficulty due to the fact that all molecules of the polypropylene material are carbon and hydrogen elements, and the heat resistance of the polypropylene material is poorer than that of engineering plastics, so that the flame retardance and the heat resistance of the polypropylene material are improved, the advantages of low dielectric constant, low density and low cost are kept, and the polypropylene material has great economic significance and social significance for application of the polypropylene material in the 5G field.
With the rapid development of 5G communication, in recent years, the application research of polypropylene materials in the field of 5G communication, particularly the research of polypropylene material reinforced modification applied to 5G antenna covers, is increasing, but the application research of flame retardant polypropylene for 5G is very little. CN 109206751 introduces a weather-resistant flame-retardant polypropylene modified material for an antenna housing, which is mainly characterized in that polypropylene is modified by electronic-grade glass fiber, low-dielectric filler, toughening agent, compatilizer, halogen-free flame retardant and the like, the total addition proportion is about 20-50 parts, although the strength and the heat resistance of the polypropylene material are improved, the density and the dielectric constant of the material are obviously increased, the density of the material is more than 1.1, the dielectric constant is more than 2.6, the cost of the material is greatly increased, and the application in the field of 5G communication is greatly limited; CN 111117070 introduces a high-flow flame-retardant PP base material for LFT-D process and a low-dielectric low-stress halogen-free flame-retardant polypropylene composite material, which mainly adopts low-dielectric glass fibers, halogen-free flame retardant, flame-retardant synergist, antioxidant, weather-resistant assistant, lubricant, compatilizer and the like, wherein the addition ratio of the halogen-free flame retardant to the flame-retardant synergist is about 15-35%, the ratio of the glass fibers is about 30%, the material density is more than 1.2, and the dielectric constant is about 2.8, so that the dielectric constant is not obviously reduced compared with the dielectric constant of other common engineering plastics such as PC (polycarbonate) of 2.9-3.7.
The invention mainly introduces a low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material for 5G and a preparation method thereof.
Disclosure of Invention
Based on the above, the invention aims to overcome the defects of the prior art and provide a low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material for 5G, which is low in price, environment-friendly, good in flame-retardant effect, low in specific gravity, low in dielectric constant, excellent in mechanical property and heat resistance.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: A5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material and a preparation method thereof comprise the following components in parts by weight:
65-97 parts of low-dielectric polypropylene resin;
1-10 parts of efficient phosphorus flame retardant;
1-10 parts of low-dielectric hollow micro powder.
In the thermal degradation or combustion process of the 5G low-specific-weight low-dielectric high-heat-resistant flame-retardant polypropylene composite material, the high-efficiency phosphorus flame retardant plays a role in gas phase and condensed phase flame retardance, phosphorus-containing organic free radicals neutralize free radicals generated by decomposition of polypropylene to play a role in gas phase flame retardance, glassy molten phosphate effectively blocks the permeation of heat and combustible gas, and polyphosphoric acid generated by decomposition has a dehydration and carbonization effect and plays a role in condensed phase flame retardance; the water vapor of burning output has absorbed a large amount of heats, and then has reduced combustion temperature and heat release rate, and the hollow miropowder of low dielectric has hollow structure, and great porosity can play good weight reduction and reduce material density to reduce the effect of material dielectric constant, hollow structure has good thermal-insulated effect simultaneously, and hollow miropowder can play the effect of certain nucleating agent simultaneously, thereby improves the heat resistance of material. Therefore, the 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material has the characteristics of low price, environmental protection, good flame-retardant effect, low specific gravity, low dielectric constant, excellent mechanical property and heat resistance, low smoke and low heat release, the flame-retardant grade can reach UL94V 2-V-0 grade, the density is less than 0.95cm-3, and the dielectric constant is less than 2.5.
It is preferable that: the high-efficiency phosphorus flame retardant is at least one of hypophosphite, polyphosphate and pyrophosphate, preferably hypophosphite, but is not limited to the hypophosphite, and more preferably the hypophosphite is aluminum hypophosphite.
It is preferable that: the low dielectric hollow micro powder is at least one of organic or inorganic micro powder having a hollow structure in the categories of hollow glass micro beads, hollow ceramic micro beads, POSS (cage-like silsesquioxane), molecular sieve, and zeolite, and more preferably, the hollow micro powder is hollow glass micro beads or POSS.
It is preferable that: the low-dielectric polypropylene resin is at least one of polypropylene copolymer and polypropylene homopolymer, and the melt flow rate of the polypropylene resin is 0.5-100g/10min measured at 230 ℃ and 2.16 kg.
It is preferable that: the low dielectric polypropylene resin is produced by a hydrogen regulation method and has a dielectric constant less than 2.3; the polypropylene resin has better mechanical property and lower dielectric constant.
The 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material is realized by the following scheme:
adding polypropylene resin, a high-efficiency phosphorus flame retardant and low-dielectric hollow micro powder into a mixer, uniformly mixing to obtain uniformly mixed materials, and extruding and granulating the uniformly mixed materials through a double-screw extruder to obtain the 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material.
Preferably, the mixer is a high-speed mixer, and the rotating speed of the mixer is not less than 600 r/min.
Preferably, the extrusion is carried out by means of a twin-screw extruder having a length to diameter ratio of (36-52): 1, the temperature of the melting section of the double-screw extruder is 170-230 ℃.
Preferably, the granulation is performed by a granulator having a function of drying and classification.
Compared with the prior art, the invention has the following beneficial effects:
in summary, the invention has the following advantages:
1. the high-efficiency phosphorus flame retardant plays a role in gas phase and condensed phase flame retardance in the combustion process, phosphorus-containing organic free radicals neutralize free radicals generated by decomposition of polypropylene to play a role in gas phase flame retardance, glassy molten phosphate effectively blocks permeation of heat and combustible gas, polyphosphoric acid generated by decomposition has a dehydration and carbonization role, and condensed phase flame retardance is played; the water vapor produced by combustion absorbs a large amount of heat, thereby reducing the combustion temperature and the heat release rate.
2. The low dielectric hollow micro powder has a hollow structure, the larger porosity can play a good role in reducing weight and reducing material density, so that the effect of reducing the dielectric constant of the material is achieved, the hollow structure has a good heat insulation effect, and meanwhile, the hollow micro powder can play a certain role of a nucleating agent, so that the heat resistance of the material is improved.
3. The material has the characteristics of low price, environmental protection, good flame retardant effect, low specific gravity, low dielectric constant, excellent mechanical property and heat resistance, low smoke and low heat release, the flame retardant grade can reach UL94V 2-V-0 grade, the density is below 0.95cm-3, and the dielectric constant is less than 2.5.
4. The material has good mechanical property and wide application range, and can be widely applied to the fields of 5G communication base stations, intelligent household appliance shells, electric control boxes, automatic driving automobile sensors and the like.
Detailed Description
The present invention will be further specifically described below with reference to specific examples. In the examples that follow, the amounts of the individual components are by weight. It should be noted that the following examples are given by way of illustration only and should not be construed to limit the scope of the present invention, which is intended to be covered by the claims.
Examples 1 to 9
The index steps of each example are as follows:
according to the embodiment, the polypropylene resin, the efficient phosphorus flame retardant and the low-dielectric hollow micro powder are added into a mixer according to the parts by weight to be uniformly mixed to obtain a uniformly mixed material, the uniformly mixed material is extruded and granulated through a double-screw extruder to obtain the 5G low-specific-weight low-dielectric high-heat-resistant flame-retardant polypropylene composite material, the mixer is a high-speed mixer, the rotating speed of the mixer is not less than 600r/min, the extrusion is carried out through the double-screw extruder, and the length-diameter ratio of the double-screw extruder is (36-52): 1, the temperature of the melting section of the double-screw extruder is 170-230 ℃, and granulation is carried out by a granulator which has the functions of drying and grading.
The compositions of each of the halogen-free flame retardant polypropylene composites of examples 1-9 and comparative example 1 are shown in Table 1.
The component contents of each of the halogen-free flame retardant polypropylene composites of examples 1 to 9 and comparative example 1 are shown in Table 2.
The results of analyzing the properties of each of the halogen-free flame retardant polypropylene composites of examples 1 to 9 and comparative example 1 are shown in Table 3.
TABLE 1 compositions of halogen-free flame retardant Polypropylene composites of examples 1-9 and comparative example 1
TABLE 2 halogen-free flame-retardant Polypropylene composite materials of examples 1-9 and comparative example 1 with respect to the content of each component (in parts by weight)
TABLE 3 analysis results of respective properties of the halogen-free flame-retardant polypropylene composite materials of examples 1 to 9 and comparative example 1
Remarking: the sources of the raw materials used in the present invention are as follows, but are not limited by the following raw materials.
The copolymerized polypropylene is PP K8303; performing medium petrochemical processing; the melt flow rate of 2.16kg at 230 ℃ is 2.5g/10 min;
homo-polypropylene with the trade name PP Z30S; performing medium petrochemical processing; the melt flow rate of 2.16kg at 230 ℃ is 25g/10 min;
the copolymerized polypropylene is PP 4220; performing medium petrochemical processing; the melt flow rate of 2.16kg at 230 ℃ is 0.38g/10 min;
aluminum hypophosphite: the mark is HT-220; chemical engineering of the Taixing;
hollow glass beads: the brand number is K25; 3M company;
POSS micro powder: the brand number is P102212; and (3) performing Aladdin.
As can be seen from tables 1 to 3, as shown in table 3, compared with comparative example 1, the 5G polypropylene composite material with low specific gravity, low dielectric constant, high heat resistance and flame retardancy described in this application has good mechanical properties, in addition to low density, low dielectric constant, good flame retardancy, etc.
Comparing the example 4 with the example 2, it can be seen that when the efficient phosphorus flame retardant is aluminum hypophosphite and the addition proportion is 8-10%, the flame retardant performance is improved from V2 to V0, and the flame retardant performance of the material is higher; comparing the example 1 with the example 2, it can be seen that when the hollow micro powder is POSS micro powder, the dielectric constant of the obtained flame-retardant polypropylene composite material is lower, and the POSS micro powder has better effect of reducing the dielectric constant of the material than the hollow glass micro-beads; comparing example 8 with example 9, it can be seen that when the melt flow rate of the polypropylene resin is 0.5-100g/10min at 230 ℃ under the condition of 2.16kg, the tensile strength of the obtained flame retardant polypropylene composite material is better, the flame retardant property is better, and the dielectric constant is lower.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material is characterized in that: the composition comprises the following components in parts by weight:
65-97 parts of low-dielectric polypropylene resin;
1-10 parts of efficient phosphorus flame retardant;
1-10 parts of low-dielectric hollow micro powder.
2. The 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material as claimed in claim 1, wherein: the low dielectric polypropylene resin is polypropylene resin with a dielectric constant less than or equal to 2.3.
3. The 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material as claimed in claim 2, wherein: the melt flow rate of the polypropylene resin is 0.5-100g/10min measured at 230 ℃ and 2.16 kg.
4. The 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material as claimed in claim 1, wherein: the high-efficiency phosphorus flame retardant is at least one of hypophosphite, polyphosphate and pyrophosphate, and is preferentially hypophosphite.
5. The 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material as claimed in claim 1, wherein: the low-dielectric hollow micro powder is at least one of organic or inorganic micro powder with a hollow structure in the categories of hollow glass micro beads, hollow ceramic micro beads, POSS, molecular sieves and zeolite, and is preferably any one of the hollow glass micro beads or POSS.
6. The 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material as claimed in claim 1, wherein: the low-dielectric polypropylene resin is at least one of polypropylene copolymer and polypropylene homopolymer.
7. A process for preparing the 5G low specific gravity, low dielectric, high heat resistant and flame retardant polypropylene composite of any one of claims 1 to 6, wherein: adding polypropylene resin, a high-efficiency phosphorus flame retardant and low-dielectric hollow micro powder into a mixer, uniformly mixing to obtain uniformly mixed materials, and extruding and granulating the uniformly mixed materials through a double-screw extruder to obtain the 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material.
8. The preparation method of the 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material according to claim 7, wherein the preparation method comprises the following steps: the rotating speed of the mixer is not less than 600 r/min.
9. The preparation method of the 5G low-specific-gravity low-dielectric high-heat-resistant flame-retardant polypropylene composite material according to claim 7, wherein the preparation method comprises the following steps: the length-diameter ratio of the double-screw extruder is (36-52): 1, the temperature of the melting section of the double-screw extruder is 170-230 ℃.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105602101A (en) * | 2015-12-30 | 2016-05-25 | 上海普利特复合材料股份有限公司 | High-heat-resisting, halogen-free and flame-retardant polypropylene composite material and preparation method thereof |
| CN109206751A (en) * | 2018-07-18 | 2019-01-15 | 上海阿莱德实业股份有限公司 | Antenna house weather-resistance flame-retardant polypropylene modified material and preparation method thereof |
| CN109912890A (en) * | 2019-03-27 | 2019-06-21 | 哈尔滨理工大学 | The fire-retardant low dielectric polypropylene material of one kind and preparation method and application |
| CN112063048A (en) * | 2020-09-02 | 2020-12-11 | 上海金发科技发展有限公司 | Low-dielectric high-melt-strength flame-retardant polypropylene material and preparation method thereof |
-
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- 2020-12-28 CN CN202011581917.7A patent/CN112679855B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105602101A (en) * | 2015-12-30 | 2016-05-25 | 上海普利特复合材料股份有限公司 | High-heat-resisting, halogen-free and flame-retardant polypropylene composite material and preparation method thereof |
| CN109206751A (en) * | 2018-07-18 | 2019-01-15 | 上海阿莱德实业股份有限公司 | Antenna house weather-resistance flame-retardant polypropylene modified material and preparation method thereof |
| CN109912890A (en) * | 2019-03-27 | 2019-06-21 | 哈尔滨理工大学 | The fire-retardant low dielectric polypropylene material of one kind and preparation method and application |
| CN112063048A (en) * | 2020-09-02 | 2020-12-11 | 上海金发科技发展有限公司 | Low-dielectric high-melt-strength flame-retardant polypropylene material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张建耀等: "PP电缆料无卤阻燃技术的研究与应用进展", 《合成树脂及塑料》 * |
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