CN114106462A - High-modulus automotive interior flame-retardant PP material and preparation method thereof - Google Patents
High-modulus automotive interior flame-retardant PP material and preparation method thereof Download PDFInfo
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 88
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000000463 material Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- 239000004743 Polypropylene Substances 0.000 claims abstract description 74
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 31
- 239000002131 composite material Substances 0.000 claims abstract description 29
- 238000001035 drying Methods 0.000 claims abstract description 18
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 18
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 18
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 16
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 16
- 229920001577 copolymer Polymers 0.000 claims abstract description 13
- -1 polypropylene Polymers 0.000 claims abstract description 12
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920001155 polypropylene Polymers 0.000 claims abstract description 10
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 25
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 claims description 16
- JKBYAWVSVVSRIX-UHFFFAOYSA-N octadecyl 2-(1-octadecoxy-1-oxopropan-2-yl)sulfanylpropanoate Chemical group CCCCCCCCCCCCCCCCCCOC(=O)C(C)SC(C)C(=O)OCCCCCCCCCCCCCCCCCC JKBYAWVSVVSRIX-UHFFFAOYSA-N 0.000 claims description 9
- 239000007822 coupling agent Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- FFZQJAHBHYRHSU-UHFFFAOYSA-N 2-hydroxy-1,3,2$l^{5}-dioxaphosphinane 2-oxide Chemical group OP1(=O)OCCCO1 FFZQJAHBHYRHSU-UHFFFAOYSA-N 0.000 claims description 6
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 5
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 4
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 3
- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 claims 1
- 229940083037 simethicone Drugs 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 230000002195 synergetic effect Effects 0.000 abstract description 5
- 238000013329 compounding Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 17
- 239000000523 sample Substances 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000454 talc Substances 0.000 description 3
- 235000012222 talc Nutrition 0.000 description 3
- 229910052623 talc Inorganic materials 0.000 description 3
- 239000012745 toughening agent Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013068 control sample Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229940008099 dimethicone Drugs 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000003678 scratch resistant effect Effects 0.000 description 2
- VKJLYEDTHCTCOH-UHFFFAOYSA-N 3-(3-octadecoxy-3-oxopropyl)sulfanylpropanoic acid Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(O)=O VKJLYEDTHCTCOH-UHFFFAOYSA-N 0.000 description 1
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012796 inorganic flame retardant Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013074 reference sample Substances 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application relates to the field of preparation of automotive interior materials, and particularly discloses a high-modulus automotive interior flame-retardant PP material and a preparation method thereof. The high-modulus flame-retardant PP material for the automotive interior is prepared from the following raw materials in parts by weight: 70-80 parts of polypropylene PP particles, 10-16 parts of inorganic composite flame retardant, 6-8 parts of linear ethylene-octene copolymer, 10-15 parts of talcum powder and 1.2 parts of antioxidant; the inorganic composite flame retardant is prepared by compounding modified nano aluminum hydroxide, micron magnesium hydroxide and zinc borate at a certain ratio, the synergistic effect of the modified nano aluminum hydroxide, the micron magnesium hydroxide and the zinc borate is fully exerted, and the flame retardant effect of the PP material for the automotive trim is improved; the preparation method comprises the following steps: and mixing, extruding, melting, granulating and drying the raw materials with corresponding weight to obtain the PP flame-retardant material for the automotive interior. The PP material for the automotive interior has the advantages of excellent flame retardance and high modulus; in addition, the preparation method has the advantages of simple preparation process and suitability for industrial production.
Description
Technical Field
The application relates to the field of preparation of automotive interior materials, in particular to a high-modulus automotive interior flame-retardant PP material and a preparation method thereof.
Background
Automotive interior mainly indicates the automobile product that the inside repacking of car was used, involves the square face of car inside, for example car steering wheel cover, car cushion, car callus on the sole, car perfume, car pendant, inside goods of furniture for display rather than for use, containing box etc..
The requirements for flame retardancy of automotive interior parts are becoming increasingly stringent. Meanwhile, the VOC requirement of the automotive interior parts is a problem which needs to be solved by various automotive host factories. Automobile interior parts such as door panels, pillars, threading pipes, handles, ceilings, center consoles and the like are mostly made of PP materials. The flame retardance of the PP material is mostly a halogen-containing flame-retardant system, but the PP material is not suitable for being used in automotive interior parts due to the problems of easy precipitation, large smell, easy aging and the like; inorganic flame retardants such as aluminum hydroxide and magnesium hydroxide have good chemical stability, are not easy to volatilize, have low toxicity or are non-toxic, do not generate harmful gases such as corrosion and the like, and are environment-friendly, but generally can generate good flame retardant effect only by high filling amount.
In view of the above-mentioned related art, the inventors considered that aluminum hydroxide and magnesium hydroxide have a disadvantage of poor flame retardant effect when used as a flame retardant for an automotive interior PP material.
Disclosure of Invention
In order to solve the problem that when aluminum hydroxide and magnesium hydroxide are used as flame retardants to be applied to automotive interior PP materials, the flame retardant effect is poor, the application provides a high-modulus automotive interior flame retardant PP material and a preparation method thereof.
The application provides a high-modulus automotive interior flame-retardant PP material, adopts following technical scheme:
the high-modulus flame-retardant PP material for the automotive interior is prepared from the following raw materials in parts by weight: 70-80 parts of polypropylene PP particles, 10-16 parts of inorganic composite flame retardant, 6-8 parts of linear ethylene-octene copolymer, 10-15 parts of talcum powder and 1.2 parts of antioxidant;
the preparation method of the inorganic composite flame retardant comprises the following steps:
stirring and heating the nano aluminum hydroxide powder, adding a coupling agent into the nano aluminum hydroxide powder, and fully coupling and modifying the nano aluminum hydroxide to obtain modified nano aluminum hydroxide;
mixing the obtained modified nano aluminum hydroxide with the micron magnesium hydroxide and the zinc borate according to the weight ratio of (1-5): (6-8): 1, mixing and stirring uniformly to prepare the inorganic composite flame retardant.
By adopting the technical scheme, the modified nano aluminum hydroxide has excellent compatibility and high decomposition speed; the micron magnesium hydroxide has large surface polarity, slow decomposition speed, good flame retardant effect and poor compatibility; after the two materials are compounded, the modified nano aluminum hydroxide can rapidly exert the effect, the micro magnesium hydroxide can continuously exert the effect for a long time, the quick effect and the long effect are combined, and the formed inorganic composite flame retardant has the high-efficiency and smokeless effect under the auxiliary action of zinc borate, so that the flame retardance of the flame-retardant PP material for the automotive trim is improved;
the talcum powder is used as an inorganic filler, so that the rigidity and toughness of the polypropylene composite material can be improved; the linear ethylene-octene copolymer is used as a toughening agent of the polypropylene composite material to reduce the brittleness of the composite material and improve the impact resistance of the material; the talcum powder and the linear ethylene-octene copolymer improve the mechanical property of the flame-retardant PP material for the automotive interior under the common condition, so that the flame-retardant PP material has high modulus;
optionally, the addition amount of the coupling agent is 0.5-3% of the weight of the nano aluminum hydroxide powder.
By adopting the technical scheme, the addition amount of the coupling agent is optimized, so that the dispersity of the modified nano aluminum hydroxide is better, and the flame retardant property and the mechanical property of the flame retardant PP material for the automotive interior are improved.
Optionally, the coupling agent comprises one of dimethicone, linear dimethicone, and sodium oleate.
Optionally, the heating temperature of the nano aluminum hydroxide powder is 100-130 ℃.
By adopting the technical scheme, the heating temperature of the nano aluminum hydroxide powder is optimized, so that the nano aluminum hydroxide powder is mixed with the micron magnesium hydroxide and the zinc borate more uniformly, and the synergistic effect of the inorganic composite flame retardant is improved.
Optionally, the antioxidant comprises a primary antioxidant and an auxiliary antioxidant, the primary antioxidant is dioctadecyl thiodipropionate, the auxiliary antioxidant is trimethylene phosphate, and the weight ratio of the dioctadecyl thiodipropionate to the trimethylene phosphate is 1: (1-3).
By adopting the technical scheme, the dioctadecyl thiodipropionate can effectively prevent the thermal oxidation degradation of polypropylene in the long-term aging process, has synergistic effect when being used together with the triphosphite, can effectively improve the anti-aging comprehensive capability of the PP material of the automotive trim by combining the dioctadecyl thiodipropionate and the triphosphite, and can effectively prolong the service life of the flame-retardant PP material of the automotive trim.
Optionally, the raw materials also comprise 0.2-0.5 weight part of auxiliary agent.
By adopting the technical scheme, the auxiliary agent has strong compatibility with the PP base material, low diffusion speed and good polarity, and is beneficial to prolonging the service life of the automotive interior flame-retardant PP material.
Optionally, the raw material further comprises 0.3-0.5 weight part of inorganic toner.
By adopting the technical scheme, under the condition of meeting the requirement of environmental protection, the addition of the inorganic toner is beneficial to improving the commercial value of a product made of the flame-retardant PP material for the automotive interior.
In a second aspect, the application provides a preparation method of a high-modulus flame-retardant PP material for automotive interiors, which adopts the following technical scheme:
a preparation method of a high-modulus flame-retardant PP material for automotive interiors comprises the following steps:
mixing the raw materials with corresponding weight to form a mixture;
extruding, melting and granulating the mixture to obtain master batches;
and drying the master batch to obtain the high-modulus PP flame-retardant material for the automotive interior.
By adopting the technical scheme, the prepared automobile interior flame-retardant PP material has excellent flame retardance and high modulus, can be better applied to automobile interiors, greatly improves the mechanical property of the automobile interiors, is simple in preparation process, does not need special equipment, and is suitable for industrial production.
Optionally, the raw materials are mixed by adopting a stirring mode, wherein the stirring speed is 300-400r/min, and the stirring time is 5-10 min.
Optionally, in the master batch drying process, the drying temperature is 85-90 ℃, and the drying time is 2-3 h.
By adopting the technical scheme, the stirring speed, the stirring time, the drying temperature and the drying time are optimized, and the preparation of the PP flame-retardant material for the automotive interior is facilitated.
In summary, the present application has the following beneficial effects:
1. because the inorganic composite flame retardant formed by compounding the modified nano aluminum hydroxide and the micron aluminum hydroxide under the assistance of the zinc borate belongs to a halogen-free flame retardant, the inorganic composite flame retardant is non-toxic and can avoid toxic smoke generated when a halogen-containing flame-retardant high polymer material is combusted, and the excellent flame-retardant effect of the automotive interior flame-retardant PP material is obtained under the full play of the flame-retardant synergistic effect of the aluminum hydroxide and the magnesium hydroxide;
2. according to the application, the talcum powder is added into the PP material as an inorganic filler, so that the production cost of the PP material is reduced, and the rigidity and toughness of the polypropylene composite material can be improved; the linear ethylene-octene copolymer is used as a toughening agent of the PP material, so that the brittleness of the composite material is reduced and the impact resistance is improved; the talcum powder and the linear ethylene-octene copolymer enable the automotive interior flame-retardant PP material to have high modulus performance and excellent impact resistance under the common condition;
3. the dioctadecyl thiodipropionate is preferably used as a main antioxidant, the trimethylene phosphate is preferably used as an auxiliary antioxidant, and the dioctadecyl thiodipropionate and the trimethylene phosphate have a synergistic effect, so that the service life of the flame-retardant PP material for the automotive interior is effectively prolonged.
Detailed Description
The present application is described in further detail below with reference to preparation examples and examples.
Among the relevant raw materials used in the preparation examples and examples:
the model of the polypropylene PP particles is GB303 HP; the average grain diameter of the nano aluminum hydroxide is less than or equal to 80 nm; the average grain diameter of the micron magnesium hydroxide is 1-10 μm; the density of the linear ethylene-octene copolymer was 0.88g/cm38137; the average grain diameter of the talcum powder is 0.1-2 μm; the trade name of the dioctadecyl thiodipropionate is 123-28-4; the grade of the triphosphite is KC-69; BASF scratch-resistant agent is selected as the auxiliary agent.
Preparation example
Preparation example 1
The preparation example prepares an inorganic composite flame retardant, and the specific method is as follows:
putting 100kg of nano aluminum hydroxide powder into a high-speed stirrer, uniformly stirring and heating to 100 ℃, and adding 0.5kg of dimethyl silicone oil into the nano aluminum hydroxide powder by adopting a spraying method to fully couple and modify the nano aluminum hydroxide to prepare modified nano aluminum hydroxide;
adding 600kg of micron magnesium hydroxide and 100kg of zinc borate into the modified nano aluminum hydroxide, and uniformly stirring to obtain the inorganic composite flame retardant.
Preparation example 2
The preparation example prepares an inorganic composite flame retardant, and the specific method is as follows:
placing 300kg of nano aluminum hydroxide powder in a high-speed stirrer, uniformly stirring and heating to 115 ℃, adding 4.5kg of linear polydimethylsiloxane into the nano aluminum hydroxide powder by adopting a spraying method, and fully coupling and modifying the nano aluminum hydroxide to prepare modified nano aluminum hydroxide;
adding 700kg of micron magnesium hydroxide and 100kg of zinc borate into the modified nano aluminum hydroxide, and uniformly stirring to obtain the inorganic composite flame retardant.
Preparation example 3
Putting 500kg of nano aluminum hydroxide powder into a high-speed stirrer, uniformly stirring and heating to 130 ℃, adding 15kg of sodium oleate into the nano aluminum hydroxide powder by adopting a spraying method, and fully coupling and modifying the nano aluminum hydroxide to prepare modified nano aluminum hydroxide;
adding 800kg of micron magnesium hydroxide and 100kg of zinc borate into the modified nano aluminum hydroxide, and uniformly stirring to obtain the inorganic composite flame retardant.
Examples
Examples 1 to 15
As shown in Table 1, the main difference between examples 1-15 is the different ratios of the raw materials of the PP material.
The following description will be given by taking example 1 as an example. The application discloses a high-modulus automotive interior flame-retardant PP material, which is implemented by the following specific formula: 70kg of polypropylene PP particles, 10kg of inorganic composite flame retardant, 6kg of linear ethylene-octene copolymer, 10kg of talcum powder, 0.6kg of stearyl thiodipropionate and 0.6kg of triphosphite, wherein the inorganic composite flame retardant is obtained in preparation example 2.
Example 1 a method for preparing a high modulus flame retardant PP material for automotive interiors is as follows:
weighing the raw materials according to the formula, placing the raw materials in a stirrer, and stirring for 10min at the stirring speed of 300r/min to fully mix the raw materials to form a mixture;
putting the mixture into a double-screw extruder, performing well melting extrusion, cooling and granulating to obtain master batches, wherein the temperature of each region of the screw is as follows: the first zone, the second zone 140-; rotating speed of the screw main machine: 220-350 r/min;
drying the master batch to obtain a high-modulus automotive interior flame-retardant PP material; wherein the drying temperature is 85 ℃ and the drying time is 3 h.
TABLE 1 blending ratio of raw materials in flame retardant PP materials for automotive interiors in examples 1 to 15
Example 16
This example is different from example 15 in that the inorganic composite flame retardant obtained in preparation example 1 was used.
Example 17
This example is different from example 15 in that the inorganic composite flame retardant obtained in preparation example 3 was used.
Example 18
The difference between the embodiment and the embodiment 15 is that in the preparation method, the stirring speed is 400r/min, and the stirring time is 5 min; the drying temperature is 90 deg.C, and the drying time is 2 min.
Comparative example
Comparative example 1
The difference between the comparative example and the example 2 is that the flame retardant in the PP material is completely modified nano aluminum hydroxide, and the addition amount of the flame retardant is 10 kg.
Comparative example 2
This comparative example differs from example 2 in that the flame retardant in the PP material is entirely micrometer magnesium hydroxide and its addition is 10 kg.
Comparative example 3
This comparative example differs from example 4 in that the amount of talc added is 0 kg.
Comparative example 4
This comparative example differs from example 4 in that the amount of talc added was 30 kg.
Comparative example 5
This comparative example is different from example 6 in that the linear ethylene-octene copolymer was added in an amount of 0 kg.
Comparative example 6
This comparative example differs from example 6 in that the linear ethylene-octene copolymer was added in an amount of 15 kg.
Performance test
The same weight of the automotive interior flame retardant PP materials obtained in examples 1 to 18 was used as test samples 1 to 18, and the same weight of the automotive interior flame retardant PP materials obtained in comparative examples 1 to 6 was used as control samples 1 to 6. The test sample and the control sample were subjected to performance measurement, and the results are shown in Table 2.
First, mechanical property
The mechanical property test is carried out under the conditions that the temperature is 25 ℃ and the humidity is 50 percent, and the test is as follows:
according to GB/T1040, 1/2-2006, corresponding test samples and control samples are subjected to tensile yield stress and tensile strain at break, data are recorded and analyzed, wherein the shape and the size of the test sample are 1B type;
according to GB/T9341-2008, the bending modulus test is carried out on the corresponding test sample and the corresponding reference sample, data is recorded and analyzed, wherein the size of the test sample is 80 multiplied by 10 multiplied by 4mm, and the test speed is 20 mm/min;
according to GB/T1843-2008, the cantilever beam notch impact strength test is carried out on the corresponding test sample and the corresponding control sample, data are recorded and analyzed, wherein the size of the test sample is 80X 10X 4mm, and the notch of the test sample is A type.
Second, flame retardant property
According to GB/T2406.2-2009, JF-3 type oxygen index tests are carried out on corresponding test samples and control samples, data are recorded and analyzed, and the sample size is 80X 6X 3 mm.
Table 2 table of performance testing data
Referring to table 2, by combining examples 2, 4 and 5 and comparative examples 1 and 2, it can be seen that the flame retardant added with single modified nano aluminum hydroxide and micro magnesium hydroxide has no flame retardant effect and mechanical property after being compounded, and has good flame retardant effect and high bending modulus on the PP material of the automotive interior; with the increasing of the adding amount of the inorganic composite flame retardant, the oxygen index of the PP material of the automotive trim is increased, and the flame retardance is improved.
Referring to table 2, combining examples 4, 6, and 7 and comparative examples 3 and 4, it can be seen that the greater the rigidity and toughness of the material, the worse the impact strength, as the amount of talc added as the filler is increased.
Referring to table 2, in combination with examples 6, 8, 9 and comparative examples 5 and 6, it can be seen that the impact strength of the test specimen can be effectively improved with the continuous addition of the toughening agent linear ethylene-octene copolymer; however, the addition of the linear ethylene-octene copolymer also results in a decrease in the rigidity and toughness of the specimen.
Referring to Table 2, in combination with examples 1-3, it can be seen that with the addition of PP polypropylene particles, the rigidity and toughness of the test specimens are improved, and the impact strength of the corresponding test specimens is reduced.
Referring to table 2, in combination with examples 8 and 10 to 15, it can be seen that the addition of the antioxidant, the BASF scratch-resistant agent and the inorganic toner in the PP material has little influence on the mechanical properties and the flame retardant properties of the sample.
Referring to table 2, in combination with examples 15-17, it can be seen that the inorganic composite flame retardant prepared by changing the compound ratio of the modified nano aluminum hydroxide, the micro magnesium hydroxide and the zinc borate, the stirring temperature of the modified nano aluminum hydroxide and the type and content of the coupling agent within a proper range has a good flame retardant effect; and the inorganic composite flame retardant prepared in preparation example 2 has excellent flame retardant performance on a sample.
Referring to table 2, in combination with examples 15 and 18, it can be seen that by varying the stirring speed, the stirring time, the drying temperature and the drying time in the preparation method within appropriate ranges, the obtained test specimens all have excellent mechanical properties and flame retardancy.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The high-modulus flame-retardant PP material for the automotive interior is characterized by being prepared from the following raw materials in parts by weight: 70-80 parts of polypropylene PP particles, 10-16 parts of inorganic composite flame retardant, 6-8 parts of linear ethylene-octene copolymer, 10-15 parts of talcum powder and 1.2 parts of antioxidant;
the preparation method of the inorganic composite flame retardant comprises the following steps:
stirring and heating the nano aluminum hydroxide powder, adding a coupling agent into the nano aluminum hydroxide powder, and fully coupling and modifying the nano aluminum hydroxide to obtain modified nano aluminum hydroxide;
mixing the obtained modified nano aluminum hydroxide with the micron magnesium hydroxide and the zinc borate according to the weight ratio of (1-5): (6-8): 1, mixing and stirring uniformly to prepare the inorganic composite flame retardant.
2. The high modulus flame retardant PP material for automotive interiors according to claim 1, characterized in that: the addition amount of the coupling agent is 0.5-3% of the weight of the nano aluminum hydroxide powder.
3. The high modulus flame retardant PP material for automotive interiors according to claim 1, characterized in that: the coupling agent comprises one of simethicone, linear polydimethylsiloxane and sodium oleate.
4. The high modulus flame retardant PP material for automotive interiors according to claim 1, characterized in that: the heating temperature of the nano aluminum hydroxide powder is 100-130 ℃.
5. The high modulus flame retardant PP material for automotive interiors according to claim 1, characterized in that: the antioxidant comprises a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is dioctadecyl thiodipropionate, the auxiliary antioxidant is trimethylene phosphate, and the weight ratio of the dioctadecyl thiodipropionate to the trimethylene phosphate is 1: (1-3).
6. The high modulus flame retardant PP material for automotive interiors according to claim 1, characterized in that: the raw materials also comprise 0.2 to 0.5 weight part of auxiliary agent.
7. The high modulus flame retardant PP material for automotive interiors according to claim 6, characterized in that: the raw material also comprises 0.3-0.5 weight part of inorganic toner.
8. The preparation method of the high modulus flame retardant PP material for automotive interiors of any of claims 1 to 7, wherein: the method comprises the following steps:
mixing the raw materials with corresponding weight to form a mixture;
extruding, melting and granulating the mixture to obtain master batches;
and drying the master batch to obtain the high-modulus automotive interior flame-retardant PP material.
9. The preparation method of the high modulus PP flame retardant material for automotive interiors according to claim 8, characterized by comprising the following steps: the raw materials are mixed by adopting a stirring mode, wherein the stirring speed is 300-400r/min, and the stirring time is 5-10 min.
10. The preparation method of the high modulus PP flame retardant material for automotive interiors according to claim 8, characterized by comprising the following steps: in the master batch drying process, the drying temperature is 85-90 ℃, and the drying time is 2-3 h.
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