CN112961428A - Halogen-free flame-retardant polypropylene compound suitable for new energy automobile and application and preparation method thereof - Google Patents
Halogen-free flame-retardant polypropylene compound suitable for new energy automobile and application and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of high molecular polymers, in particular to a halogen-free flame-retardant polypropylene compound suitable for new energy automobiles, and an application and a preparation method thereof, wherein the halogen-free flame-retardant polypropylene compound comprises the following components in parts by weight: 43.5-78.4 parts by weight of polypropylene; 10-30 parts by weight of a phosphorus-nitrogen type halogen-free intumescent flame retardant; 1-4 parts by weight of epoxy resin; 0.5-2 parts by weight of hindered amine light stabilizer; 10-20 parts by weight of talcum powder; 0.1-0.5 part by weight of heat stabilizer, and the halogen-free flame-retardant polypropylene composite has the advantages of good flame retardant property, good thermal stability and good water resistance, and can be applied to preparation of flame-retardant part electronics and flame-retardant electric appliance parts around a new energy automobile battery pack.
Description
Technical Field
The invention relates to the technical field of high molecular polymers, in particular to a halogen-free flame-retardant polypropylene compound suitable for new energy automobiles and an application and a preparation method thereof.
Background
The polypropylene has the advantages of no toxicity, environmental protection, recoverability and the like, so that the polypropylene can be rapidly used for replacing expensive engineering plastics in various fields of national economy such as automobiles, electronic appliances, buildings, textiles, packaging and the like, and is widely applied. The polypropylene has gradually replaced engineering plastics such as ABS, PC/ABS and the like and is widely applied to automobile parts due to the advantage of high cost performance. The new energy automobile has the environmental protection characteristic and becomes the development trend of the national automobile industry, the new energy automobile adopts the battery pack to replace an engine of a fuel oil automobile, so the new energy automobile has excellent flame retardant performance for the materials around the battery pack, and simultaneously cannot adopt a brominated flame retardant with extremely high toxicity after combustion, and a halogen-free flame retardant is required to be adopted.
At present, the halogen-free flame retardant of the polypropylene material is mainly an intumescent phosphorus-nitrogen flame retardant, the components of the intumescent phosphorus-nitrogen flame retardant are an acid source, a carbon source and a gas source, the acid source component is ammonium polyphosphate, the carbon source is a main component of pentaerythritol, and the gas source is melamine and derivatives thereof. The halogen-free phosphorus-nitrogen flame retardant has the advantages that the flame retardant performance is excellent, and the products generated after combustion are carbon dioxide, water, nitrogen and other non-toxic gases. However, the phosphorus-nitrogen type halogen-free intumescent flame retardant still has the following defects: the phosphorus-nitrogen type halogen-free intumescent flame retardant has extremely strong surface polarity, so the phosphorus-nitrogen type halogen-free intumescent flame retardant has poor compatibility with polypropylene, so the phosphorus-nitrogen type halogen-free intumescent flame retardant has poor thermal stability and very poor hydrolysis stability, after the new energy automobile is used for a long time, the flame retardant property of the final material is seriously reduced due to the thermal decomposition of the flame retardant caused by thermal aging and the hydrolysis of the flame retardant caused by humid weather.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention aims to provide a halogen-free flame-retardant polypropylene composite suitable for new energy automobiles, and an application and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the halogen-free flame-retardant polypropylene compound suitable for the new energy automobile comprises the following components in parts by weight: 43.5-78.4 parts by weight of polypropylene; 10-30 parts by weight of a phosphorus-nitrogen type halogen-free intumescent flame retardant; 1-4 parts by weight of epoxy resin; 0.5-2 parts by weight of hindered amine light stabilizer; 10-20 parts by weight of talcum powder; 0.1 to 0.5 part by weight of a heat stabilizer.
The two-component material of the epoxy resin and the hindered amine light stabilizer can treat the surface of the phosphorus-nitrogen type halogen-free intumescent flame retardant, the polar component on the surface of the phosphorus-nitrogen type halogen-free intumescent flame retardant in the obtained halogen-free flame retardant polypropylene compound is fully bonded with the hindered amine light stabilizer and the epoxy resin, and both the epoxy resin and the hindered amine light stabilizer can effectively capture free radicals, so that the thermal stability of the phosphorus-nitrogen type halogen-free intumescent flame retardant is improved, and the free radicals generated by combustion can be captured, so that the synergistic flame retardant effect can be exerted; in addition, the epoxy resin and the polar group on the surface of the phosphorus-nitrogen halogen-free intumescent flame retardant are subjected to chemical coupling, so that the defect of poor water resistance of the phosphorus-nitrogen halogen-free intumescent flame retardant can be overcome, and the phosphorus-nitrogen halogen-free intumescent flame retardant can be easily dispersed in polypropylene in the blending and extrusion process, so that the halogen-free flame retardant polypropylene composite is endowed with excellent heat resistance and hydrolysis resistance.
Preferably, the composition comprises the following components in parts by weight: 50-70 parts by weight of polypropylene; 15-20 parts by weight of a phosphorus-nitrogen type halogen-free intumescent flame retardant; 2-3 parts by weight of epoxy resin; 1-1.5 parts by weight of a hindered amine light stabilizer; 15-23 parts of talcum powder; 0.3-0.4 part of heat stabilizer.
Preferably, the polypropylene is homopolymerized polypropylene, and the melt index of the polypropylene is more than or equal to 10g/10min, wherein the test method of the melt index is measured by adopting GB/T3682-2000 standard, and the test condition is 230 ℃ and 2.16 Kgf.
Preferably, the epoxy resin is bisphenol A epoxy resin, and the epoxy equivalent of the bisphenol A epoxy resin is 400-800.
Preferably, the particle size fineness of the talcum powder is 1000 meshes-5000 meshes, and the particle size is D90.
Preferably, the heat stabilizer is one or a mixture of at least two of phenolic antioxidant, phosphite antioxidant and thioester antioxidant.
The application of the halogen-free flame-retardant polypropylene composite is provided, and the halogen-free flame-retardant polypropylene composite is applied to the preparation of flame-retardant part electronic and flame-retardant electric appliance parts around the new energy automobile battery pack.
The preparation method of the halogen-free flame-retardant polypropylene compound comprises the following steps:
(1) fully mixing epoxy resin, hindered amine light stabilizer, phosphorus-nitrogen type halogen-free intumescent flame retardant and 5-20 parts by weight of polypropylene in an internal mixer to ensure that the surface of the phosphorus-nitrogen type halogen-free intumescent flame retardant is fully coated by the epoxy resin and the hindered amine light stabilizer, and extruding and granulating the mixture by a single-screw extruder connected in series with the internal mixer after mixing to obtain flame-retardant master batch;
(2) and (2) mixing the flame-retardant master batch obtained in the step (1) with the rest 33.5-63.4 parts by weight of polypropylene, the formula amount of talcum powder and the formula amount of heat stabilizer in a double-screw extruder, and then extruding and granulating to obtain the halogen-free flame-retardant polypropylene compound.
The setting principle of the method is as follows: firstly, an internal mixer is adopted to carry out internal mixing processing treatment on the epoxy resin, the hindered amine light stabilizer and the phosphorus-nitrogen type halogen-free intumescent flame retardant, so that the polar components on the surface of the phosphorus-nitrogen type halogen-free intumescent flame retardant are fully bonded with the hindered amine light stabilizer and the epoxy resin, and meanwhile, the phosphorus-nitrogen type halogen-free intumescent flame retardant is easy to realize good dispersion in polypropylene, so that the halogen-free flame retardant is finally endowed with excellent heat resistance and hydrolysis resistance.
Preferably, the twin screw extruder has a length to diameter ratio of 48: 1.
Preferably, in the step (1), the epoxy resin with formula amount, the hindered amine light stabilizer with formula amount, the intumescent halogen-free flame retardant with formula amount and the polypropylene with part formula amount are fully mixed in an internal mixer for 30 min.
Preferably, in the step (2), the temperature of the twin-screw extruder is set to 180 ℃ to 220 ℃.
Compared with the prior art, the beneficial effect of this application lies in:
(1) the halogen-free flame retardant polypropylene compound of the application adopts the epoxy resin and the hindered amine light stabilizer to pretreat the surface of the phosphorus-nitrogen halogen-free intumescent flame retardant innovatively, the polar component on the surface of the phosphorus-nitrogen halogen-free intumescent flame retardant is fully bonded with the hindered amine light stabilizer and the epoxy resin, both the epoxy resin and the hindered amine light stabilizer can effectively capture free radicals, thereby not only improving the thermal stability of the flame retardant, but also playing a role of synergistic flame retardance due to the capture of free radicals generated by combustion, the epoxy resin and the polar groups on the surface of the flame retardant generate chemical coupling effect, the problem of poor water resistance of the phosphorus-nitrogen halogen-free intumescent flame retardant can be improved, and simultaneously the phosphorus-nitrogen halogen-free intumescent flame retardant is easy to realize good dispersion in polypropylene in the blending extrusion process, thereby finally endowing the phosphorus-nitrogen halogen-free intumescent flame retardant with excellent heat resistance and, the halogen-free flame-retardant polypropylene composite completely meets the requirements of peripheral parts of new energy automobile batteries and electronic and electric parts on materials.
(2) According to the preparation method of the halogen-free flame-retardant polypropylene compound, the epoxy resin, the hindered amine light stabilizer and the phosphorus-nitrogen type halogen-free intumescent flame retardant are subjected to banburying processing by using an internal mixer, so that the polar components on the surface of the phosphorus-nitrogen type halogen-free intumescent flame retardant are fully bonded with the hindered amine light stabilizer and the epoxy resin, and the phosphorus-nitrogen type halogen-free intumescent flame retardant is easily dispersed in polypropylene, so that the halogen-free flame retardant is endowed with excellent heat resistance and hydrolysis resistance.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention is further illustrated by the following examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.
The following examples are given by way of example of the following sources of raw materials, which may also be used in practice from other sources, and are illustrated below:
polypropylene: the homopolypropylene PP S700, petrochemical in Lanzhou, has a melt index of 12g/10min under the test conditions of GB/T3682-.
Halogen-free phosphorus-nitrogen intumescent flame retardant: FP-2200, Idecaco, Japan.
Epoxy resin: KD-213, epoxy equivalent 550, Korea.
Hindered amine light stabilizer: UV-3529, Cyanorthe Chemicals; UV-119, Basff; UV-944, Tiangang chemical.
Talc powder: TYT-899, 3000 meshes, Guangxi Guilin Tiancheng, the particle size of which is D90.
Main antioxidant: phenolic antioxidant Irganox 1010, basf; phosphite antioxidant Irganox 168, Basff.
The following examples and comparative examples will be conducted with the formulations of table 1, table 1 below:
table 1 examples formulations table (units are parts by weight)
Example 1
The halogen-free flame retardant polypropylene composite of this example consists of the components of table 1 (example 1), and the preparation method of the halogen-free flame retardant polypropylene composite is as follows:
(1) 0.5 part by weight of hindered amine light stabilizer UV-3529, 1 part by weight of epoxy resin KD-213, 10 parts by weight of intumescent halogen-free flame retardant FP-2200 and 10 parts by weight of polypropylene PP S700 are fully mixed in an internal mixer for 30min, so that the surface of the halogen-free flame retardant is fully coated and treated by the epoxy resin and the hindered amine light stabilizer, the thermal stability and the hydrolysis resistance of the halogen-free flame retardant are improved, and the flame retardant master batch is obtained by extrusion granulation through a single screw extruder connected in series with the internal mixer after mixing.
(2) Fully mixing the flame-retardant master batch generated by the refining of the first-step internal mixer with 33.5 parts by weight of polypropylene PP S700, 0.05 part by weight of hindered phenol main antioxidant Irganox 1010 and 0.05 part by weight of phosphite auxiliary antioxidant Irganox 168, adding the mixture into a double-screw extruder through a main feed (the length-diameter ratio of the double-screw extruder is 48:1), adding 10 parts by weight of talcum powder TYT-899 through a side feed, fully blending, extruding and granulating, wherein the extrusion temperature is 200 ℃.
Example 2
The halogen-free flame retardant polypropylene composite of this example consists of the components of table 1 (example 2), and the preparation method of the halogen-free flame retardant polypropylene composite is as follows:
(1) 1 part by weight of hindered amine light stabilizer UV-3529, 2 parts by weight of epoxy resin KD-213, 20 parts by weight of intumescent halogen-free flame retardant FP-2200 and 5 parts by weight of polypropylene PP S700 are fully mixed in a mixer for 30min to ensure that the surface of the halogen-free flame retardant is fully coated and treated by the epoxy resin and the hindered amine light stabilizer, so that the thermal stability and hydrolysis resistance of the halogen-free flame retardant are improved, and the flame retardant master batch is obtained by extruding and granulating through a single screw extruder connected with the mixer in series after mixing.
(2) Fully mixing the flame-retardant master batch generated by the refining of the first-step internal mixer with 56.7 parts by weight of polypropylene PP S700, 0.15 part by weight of hindered phenol main antioxidant Irganox 1010 and 0.15 part by weight of phosphite auxiliary antioxidant Irganox 168, and then adding the mixture into a double-screw extruder (the length-diameter ratio of the double-screw extruder is 48:1) through main feeding, wherein 15 parts by weight of talcum powder TYT-899 is added through side feeding, and extruding and granulating after fully blending, wherein the extruding temperature is 210 ℃.
Example 3
The halogen-free flame retardant polypropylene composite of this example consists of the components of table 1 (example 3), and the preparation method of the halogen-free flame retardant polypropylene composite is as follows:
(1) 2 parts by weight of hindered amine light stabilizer UV-3529, 4 parts by weight of epoxy resin KD-213, 30 parts by weight of intumescent halogen-free flame retardant FP-2200 and 15 parts by weight of polypropylene PP S700 are fully mixed for 30min in a mixer to ensure that the surface of the halogen-free flame retardant is fully coated and treated by the epoxy resin and the hindered amine light stabilizer, so that the thermal stability and hydrolysis resistance of the halogen-free flame retardant are improved, and the flame retardant master batch is obtained by extruding and granulating through a single screw extruder connected with the mixer in series after mixing.
(2) Fully mixing the flame-retardant master batch generated by the refining of the first-step internal mixer with 63.4 parts by weight of polypropylene PP S700, 0.25 part by weight of hindered phenol main antioxidant Irganox 1010 and 0.25 part by weight of phosphite auxiliary antioxidant Irganox 168, and then adding the mixture into a double-screw extruder (the length-diameter ratio of the double-screw extruder is 48:1) through main feeding, wherein 20 parts by weight of talcum powder TYT-899 is added through side feeding, and extruding and granulating after fully blending, wherein the extruding temperature is 180 ℃.
Example 4
The halogen-free flame retardant polypropylene composite of this example consists of the components of table 1 (example 4) and is prepared as follows:
(1) 1 part by weight of hindered amine light stabilizer UV-3529, 2 parts by weight of epoxy resin KD-213, 20 parts by weight of intumescent halogen-free flame retardant FP-2200 and 13.1 parts by weight of polypropylene PP S700 are fully mixed in an internal mixer for 30min, so that the surface of the halogen-free flame retardant is fully coated and treated by the epoxy resin and the hindered amine light stabilizer, the thermal stability and the hydrolysis resistance of the halogen-free flame retardant are improved, and the mixture is extruded and granulated through a single screw extruder connected with the internal mixer in series after being mixed, and the flame-retardant master batch is obtained.
(2) Fully mixing the flame-retardant master batch generated by the refining of the first-step internal mixer with 51.6 parts by weight of polypropylene PP S700, 0.15 part by weight of hindered phenol main antioxidant Irganox 1010 and 0.15 part by weight of phosphite auxiliary antioxidant Irganox 168, and then adding the mixture into a double-screw extruder (the length-diameter ratio of the double-screw extruder is 48:1) through main feeding, wherein 15 parts by weight of talcum powder TYT-899 is added through side feeding, and extruding and granulating after fully blending, wherein the extruding temperature is 200 ℃.
Example 5
The halogen-free flame retardant polypropylene composite of this example consists of the components of table 1 (example 5) and is prepared as follows:
(1) 1 part by weight of hindered amine light stabilizer UV-3529, 2 parts by weight of epoxy resin KD-213, 20 parts by weight of intumescent halogen-free flame retardant FP-2200 and 15 parts by weight of polypropylene PP S700 are fully mixed in a mixer for 30min to ensure that the surface of the halogen-free flame retardant is fully coated and treated by the epoxy resin and the hindered amine light stabilizer, so that the thermal stability and hydrolysis resistance of the halogen-free flame retardant are improved, and the flame retardant master batch is obtained by extruding and granulating through a single screw extruder connected with the mixer in series after mixing.
(2) Fully mixing the flame-retardant master batch generated by the refining of the first-step internal mixer with 46.7 parts by weight of polypropylene PP S700, 0.15 part by weight of hindered phenol main antioxidant Irganox 1010 and 0.15 part by weight of phosphite auxiliary antioxidant Irganox 168, and then adding the mixture into a double-screw extruder (the length-diameter ratio of the double-screw extruder is 48:1) through main feeding, wherein 15 parts by weight of talcum powder TYT-899 is added through side feeding, and extruding and granulating after fully blending, wherein the extruding temperature is 200 ℃.
Example 6
The halogen-free flame retardant polypropylene composite of this example consists of the components of table 1 (example 6) and is prepared as follows:
(1) 1 part by weight of hindered amine light stabilizer UV-3529, 2 parts by weight of epoxy resin KD-213, 15 parts by weight of intumescent halogen-free flame retardant FP-2200 and 15 parts by weight of polypropylene PP S700 are fully mixed for 30min in a mixer to ensure that the surface of the halogen-free flame retardant is fully coated and treated by the epoxy resin and the hindered amine light stabilizer, so that the thermal stability and hydrolysis resistance of the halogen-free flame retardant are improved, and the flame retardant master batch is obtained by extruding and granulating through a single screw extruder connected with the mixer in series after mixing.
(2) Fully mixing the flame-retardant master batch generated by the refining of the first-step internal mixer with 45 parts by weight of polypropylene PP S700, 0.15 part by weight of hindered phenol main antioxidant Irganox 1010 and 0.15 part by weight of phosphite auxiliary antioxidant Irganox 168, adding the mixture into a double-screw extruder (the length-diameter ratio of the double-screw extruder is 48:1) through main feeding, adding 15 parts by weight of talcum powder TYT-899 through side feeding, fully blending, extruding and granulating, wherein the extrusion temperature is 200 ℃.
Example 7
The halogen-free flame retardant polypropylene composite of this example consists of the components of table 1 (example 7) and is prepared as follows:
(1) 1.5 parts by weight of hindered amine light stabilizer UV-3529, 3 parts by weight of epoxy resin KD-213, 20 parts by weight of intumescent halogen-free flame retardant FP-2200 and 20 parts by weight of polypropylene PP S700 are fully mixed in an internal mixer for 30min, so that the surface of the halogen-free flame retardant is fully coated and treated by the epoxy resin and the hindered amine light stabilizer, the thermal stability and hydrolysis resistance of the halogen-free flame retardant are improved, and the flame retardant master batch is obtained by extrusion granulation through a single screw extruder connected in series with the internal mixer after mixing.
(2) Fully mixing the flame-retardant master batch generated by the refining of the first-step internal mixer with 50 parts by weight of polypropylene PP S700, 0.2 part by weight of hindered phenol main antioxidant Irganox 1010 and 0.2 part by weight of phosphite auxiliary antioxidant Irganox 168, adding the mixture into a double-screw extruder (the length-diameter ratio of the double-screw extruder is 48:1) through main feeding, adding 23 parts by weight of talcum powder TYT-899 through side feeding, fully blending, extruding and granulating, wherein the extrusion temperature is 200 ℃.
Comparative example 1
The difference between the comparative example 1 and the example 4 is that 64.7 parts by weight of polypropylene PP S700, 20 parts by weight of halogen-free flame retardant FP-2200, 0.15 part by weight of hindered phenol primary antioxidant Irganox 1010 and 0.15 part by weight of phosphite auxiliary antioxidant Irganox 168 are fully mixed according to the weight ratio shown in the table 1 (the comparative example 1), and then are added into a double-screw extruder through a main feed, 15 parts by weight of talcum powder TYT-899 are added through a side feed, and extrusion granulation is carried out after full mixing; other preparation conditions were the same as in example 4.
Comparative example 2
The difference between the comparative example 2 and the example 5 is that 61.7 parts by weight of polypropylene PP S700, 2 parts by weight of epoxy resin KD-213, 1 part by weight of hindered amine light stabilizer UV-3529, 20 parts by weight of halogen-free flame retardant FP-2200, 0.15 part by weight of hindered phenol primary antioxidant Irganox 1010 and 0.15 part by weight of phosphite ester secondary antioxidant Irganox 168 are fully mixed according to the weight ratio shown in the table 1 (the comparative example 2) and then are added into a double screw extruder through a main feed, 15 parts by weight of talcum powder TYT-899 are added through a side feed, and after full mixing, extrusion granulation is carried out, wherein the extrusion temperature is 200 ℃.
The effect test of the halogen-free flame-retardant polypropylene compound comprises the following steps:
the polymers obtained in comparative examples 1 to 2 and examples 1 to 7 were subjected to the following property tests, and the test results are shown in Table 2, the property test methods being described.
And (3) carrying out UL94 flame retardant test on the plastic particles obtained by extrusion by injection molding by an injection molding machine to obtain 1.0mm standard sample strips.
The heat aging test is carried out by adopting a standard oven under the condition of 150 ℃/500h, and the UL94 flame retardant test is carried out after the heat aging.
The hydrolytic stability is soaked in a water bath at 70 ℃ for 168 hours, and then a UL94 flame retardant test is carried out.
TABLE 2 Polypropylene composite Performance test
Through a comparison experiment between the comparative example 1 and the example 4, it can be seen that the comparative example 1 is not added with the epoxy resin and the hindered amine light stabilizer, the conventional flame retardant property reaches the V-0 grade, and the flame retardant property is excellent, but the flame retardant grade of the comparative example 1 is reduced to the V-2 grade after heat aging and water bath soaking, which shows that the heat stability and the hydrolytic stability of the conventional halogen-free flame retardant polypropylene material cannot meet the requirements of new energy automobiles on the material; through a comparative experiment between the comparative example 1 and the example 5, although the epoxy resin and the hindered amine light stabilizer are added in the comparative example 2, the flame retardant is not coated by adopting an internal mixing process in the comparative example 2, the conventional flame retardant performance of the final material can reach V-0, but after thermal aging and water bath soaking, the flame retardant grade is reduced to V-1 grade, and is improved to a certain extent compared with a conventional flame retardant system, which shows that the epoxy resin and the hindered amine light stabilizer are indeed helpful to the thermal stability and the hydrolytic stability; in examples 1 to 7, the halogen-free flame retardant is fully coated by the ionic polymer in the internal mixer before the extrusion and blending of the twin-screw extruder, and finally, the conventional flame retardant performance is excellent, and the flame retardant performance is still V-0 grade after the thermal aging and the water bath soaking, which fully shows that the halogen-free flame retardant polypropylene material with excellent flame retardant performance, thermal stability and hydrolytic stability can be obtained and can be used for parts with flame retardant requirements around new energy automobile batteries.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The halogen-free flame-retardant polypropylene compound suitable for new energy automobiles is characterized by comprising the following components in parts by weight: 43.5-78.4 parts by weight of polypropylene; 10-30 parts by weight of a phosphorus-nitrogen type halogen-free intumescent flame retardant; 1-4 parts by weight of epoxy resin; 0.5-2 parts by weight of hindered amine light stabilizer; 10-20 parts by weight of talcum powder; 0.1 to 0.5 part by weight of a heat stabilizer.
2. The halogen-free flame-retardant polypropylene composite according to claim 1, comprising the following components in parts by weight: 50-70 parts by weight of polypropylene; 15-20 parts by weight of a phosphorus-nitrogen type halogen-free intumescent flame retardant; 2-3 parts by weight of epoxy resin; 1-1.5 parts by weight of a hindered amine light stabilizer; 15-23 parts of talcum powder; 0.3-0.4 part of heat stabilizer.
3. The halogen-free flame-retardant polypropylene composite according to claim 1, wherein the polypropylene is a homo-polypropylene, the melt index of the polypropylene is not less than 10g/10min, the melt index is measured by GB/T3682-2000 standard under 230 ℃ and 2.16 Kgf.
4. The halogen-free flame retardant polypropylene composite according to claim 1, wherein the epoxy resin is bisphenol A epoxy resin, and the epoxy equivalent of the bisphenol A epoxy resin is 400 to 800.
5. The halogen-free flame-retardant polypropylene compound as claimed in claim 1, wherein the talc powder has a particle size fineness of 1000 mesh to 5000 mesh and a particle size class of D90.
6. The halogen-free flame retardant polypropylene compound according to claim 1, wherein the heat stabilizer is any one or a mixture of more than two of phenolic antioxidant, phosphite antioxidant and thioester antioxidant.
7. The application of the halogen-free flame-retardant polypropylene composite according to any one of claims 1 to 6, which is characterized in that the halogen-free flame-retardant polypropylene composite is applied to the preparation of flame-retardant parts and components of electronic and electric appliances around new energy automobile battery packs.
8. The preparation method of the halogen-free flame retardant polypropylene compound according to any one of claims 1 to 6, characterized by comprising the following steps:
(1) fully mixing the epoxy resin with the formula amount, the hindered amine light stabilizer with the formula amount, the phosphorus-nitrogen type halogen-free intumescent flame retardant with the formula amount and part of polypropylene with the formula amount in an internal mixer, fully coating the surface of the phosphorus-nitrogen type halogen-free intumescent flame retardant with the epoxy resin and the hindered amine light stabilizer, and extruding and granulating the mixture by a single-screw extruder connected in series with the internal mixer after mixing to obtain flame-retardant master batch;
(2) and (2) mixing the flame-retardant master batch obtained in the step (1) with the polypropylene with the rest formula amount, the talcum powder with the formula amount and the heat stabilizer with the formula amount in a double-screw extruder, and then extruding and granulating, wherein the temperature of the double-screw extruder is set to be 180-220 ℃, so that the halogen-free flame-retardant polypropylene compound is obtained.
9. The halogen-free, flame-retardant polypropylene composite of claim 8 wherein the twin-screw extruder has a length to diameter ratio of 48: 1.
10. The halogen-free flame retardant polypropylene composite according to claim 8, wherein in the step (1), the formulated amount of the epoxy resin, the formulated amount of the hindered amine light stabilizer, the formulated amount of the intumescent halogen-free flame retardant and the formulated amount of the polypropylene are fully mixed in an internal mixer for 30 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110065730.XA CN112961428B (en) | 2021-01-18 | 2021-01-18 | Halogen-free flame-retardant polypropylene composite suitable for new energy automobile and application and preparation method thereof |
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| CN202110065730.XA CN112961428B (en) | 2021-01-18 | 2021-01-18 | Halogen-free flame-retardant polypropylene composite suitable for new energy automobile and application and preparation method thereof |
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| CN112961428A true CN112961428A (en) | 2021-06-15 |
| CN112961428B CN112961428B (en) | 2022-10-21 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073788A (en) * | 2012-12-20 | 2013-05-01 | 华南理工大学 | Weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture and preparation method thereof |
| CN109679217A (en) * | 2018-12-28 | 2019-04-26 | 浙江普利特新材料有限公司 | It is a kind of it is resistance to be precipitated, the halogen-free flame-proof reinforced polypropylene composite material of high stability and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073788A (en) * | 2012-12-20 | 2013-05-01 | 华南理工大学 | Weather-resistant moisture-resistant halogen-free flame-retardant polypropylene mixture and preparation method thereof |
| CN109679217A (en) * | 2018-12-28 | 2019-04-26 | 浙江普利特新材料有限公司 | It is a kind of it is resistance to be precipitated, the halogen-free flame-proof reinforced polypropylene composite material of high stability and preparation method thereof |
Non-Patent Citations (1)
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| R根赫特等主编1: "《塑料添加剂手册》", 31 January 2000, 化学工业出版社 * |
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