CN105273388B - A kind of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material and preparation method thereof - Google Patents

A kind of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material and preparation method thereof Download PDF

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CN105273388B
CN105273388B CN201510816194.7A CN201510816194A CN105273388B CN 105273388 B CN105273388 B CN 105273388B CN 201510816194 A CN201510816194 A CN 201510816194A CN 105273388 B CN105273388 B CN 105273388B
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polyphenylene oxide
free flame
halogen
high heat
composite material
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CN105273388A (en
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董磊
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Dongguan Bailixing New Material Co Ltd
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Abstract

The invention discloses a kind of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material and preparation method thereof, the composite is made up of following components:Polyphenylene oxide 30%~50%, syndiotactic polytyrene 15%~50%, glass fibre 10%~40%, halogen-free flame retardants 1%~7%, compatilizer 2%~6%, antioxidant 0.4%~1.0%, lubricant 0.2%~1.0%, wherein, the halogen-free flame retardants is the red phosphor masterbatch that impact resistant polystyrene is carrier.The present invention can obtain high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material by selecting high heat-resisting syndiotactic polystyrene resin, high content of phosphorus and compatibility good and carrying out halogen-free flameproof modification to the small red phosphor masterbatch of resistance to heat affecting and glass polyphenylene ether.In addition, being compatilizer by adding the graft that PPO or sPS is matrix, the impact property of high heat-resistant halogen-free flame-retardant polyphenylene oxide can be improved.

Description

A kind of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material and preparation method thereof
Technical field
The present invention relates to the technical field of polyphenylene oxide composite material, is to be related to a kind of high heat-resistant halogen-free resistance more specifically Fire polyphenylene oxide composite material and preparation method thereof.
Background technology
The relative density of polyphenylene oxide (PPO) is small, has loose proof stress, creep resistance, heat-resisting, resistant to hydrolysis, resistance to vapor, chi A series of excellent properties such as very little stability, while there is fire retardant self-extinguishment and keep excellent in very wide temperature, frequency range The features such as electric property.But polyphenylene oxide is due to the big processing difficulties of melt viscosity, so typically adding other resins, such as polyphenyl Ethene (PS), nylon (PA), acrylonitrile-butadiene-styrene (ABS) (ABS) etc. improve the processing characteristics of material.But these resins Addition can be decreased obviously the anti-flammability of polyphenylene oxide, be not suitable for the higher field such as electric of flame-retardancy requirements.For The shortcomings that overcoming the above, it has been proposed that various solutions, and applied for Patents.
Chinese patent CN102399433A discloses one kind and is used for photovoltaic junction box polyphenylene ether composition, its key component bag Include:55~95 parts of polyphenylene oxide, 45~5 parts of polystyrene, 2~10 parts of toughener, 5~20 parts of phosphate flame retardant, said composition There are good flame resistance, heat oxygen aging resistance, excellent electrical properties.Chinese patent CN102702722A discloses a kind of Halogen Fire-retardant enhancing polyphenylene oxide/ABS and preparation method thereof, its key component includes:Polyphenylene oxide 10~50%, ABS10~40%, Compositional type halogen-free flame retardants 5~25%, toughener 2~20%, glass 10~40%, compatilizer 1~10%, obtained polyphenylene oxide Alloy has the advantages that good mechanical property, excellent outward appearance, high-impact.Chinese patent CN101570631A discloses one kind High heat-resisting, halogen-free fire-retardant polyphenyl ether/polystyrene complex and preparation method thereof, the compound includes polyphenylene oxide resin, polyphenyl Ethene, toughener, halogen-free flame retardants and processing aid, wherein, halogen-free flame retardants be microencapsulation encapsulated red phosphorus and phosphate or There is heat-resisting high, fire retardant to be not easy to separate out and without halogen for one or more compounding uses in phosphite ester, obtained material The features such as.Chinese patent CN102643526A discloses a kind of superelevation heat resistance halogen-free fire-retardant polyphenyl ether composition, its main group Dividing includes:Polyphenylene oxide 70~90%, polyphenylene sulfide 0.5~10%, polystyrene 2~25%, phosphate 1~10%.By adding Enter heat resistance and mobility that polyphenylene sulfide improves composition.
Invention more than although provides some beneficial to finger in terms of the anti-flammability and heat resistance of polyphenylene oxide composite material is improved Lead, but still come with some shortcomings:(1) addition of the resin such as acrylonitrile-butadiene-styrene (ABS) (ABS) and polystyrene (PS) makes The heat resistance of polyphenylene oxide is remarkably decreased;(2) addition of phosphate ester flame retardants meets green Halogen demand for development, but by In very strong plastication, it is decreased obviously the heat resistance of polyphenylene oxide composite material while fire retardant is improved;(3) polyphenylene sulfide Although ether will not decline the heat resistance of polyphenylene oxide, itself and polyphenylene oxide poor compatibility, the mechanical performance of material is influenceed.
The content of the invention
It is an object of the invention to overcome drawbacks described above of the prior art, there is provided a kind of high heat-resistant halogen-free flame-retardant polyphenylene oxide Composite and preparation method thereof.
To achieve the above object, the first aspect of the present invention provides a kind of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite wood Material, the composite are made up of following components:
As preferable, the intrinsic viscosity that the polyphenylene oxide determines in 25 DEG C of chloroforms is 0.35~0.65dL/g.It is less than 0.35dL/g (25 DEG C of chloroforms) polyphenylene oxide molecular weight is too low, and fire resistance is poor, and when being higher than 0.65dL/g (25 DEG C of chloroforms) Although polyphenylene oxide fire resistance is good, due to its poor fluidity, processing difficulties are brought on the contrary.
As preferable, the syndiotactic polytyrene is high-impact syndiotactic polytyrene, its Izod notched impact strength More than 10KJ/m2(ISO180,23 DEG C).
As preferable, the glass fibre is alkali-free glass fiber, and filament diameter is 7~17 μm, chopped length 3~ 24mm.Fiber of the diameter less than 7 μm prepares difficulty, and is easily worn during composite processing, and loss of strength is very big; Glass of the diameter more than 17 μm can influence and the combination of resin, the same performance for influenceing composite.
As preferable, the halogen-free flame retardants is the red phosphor masterbatch that impact resistant polystyrene (HIPS) is carrier.Its In, the red phosphor masterbatch is to first pass through stabilizer, low by the red phosphorus that percentage by weight is 40%~60%, 500~1500 mesh The red phosphor masterbatch obtained again with impact resistant polystyrene extruding pelletization after molecular wax cladding.
As preferable, the compatilizer is that polyphenylene oxide grafted maleic anhydride (PPO-g-MAH) or syndiotactic polytyrene connect At least one of branch maleic anhydride (sPS-g-MAH).PPO or sPS is contained in one end of compatilizer, and the other end contains and glass table The MAH of face polar group reaction, it is possible to increase the combination of resin and glass, play more preferable compatible role.
As the compounding antioxidant system that preferable, described antioxidant is hindered phenol, phosphite ester and acid-acceptor composition.Its In, the hindered phenol is preferably four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters, the phosphite ester Preferably three [2.4- di-tert-butyl-phenyls] phosphite esters, the acid-acceptor are preferably zinc oxide (ZnO).
It is pentaerythritol stearate as preferable, described lubricant.
The second aspect of the present invention provides a kind of high heat-resistant halogen-free flame-retardant polyphenylene oxide as described in above-mentioned technical scheme and answered The preparation method of condensation material, comprises the following steps:
(1) by 30%~50% polyphenylene oxide, 15%~50% syndiotactic polytyrene, 1%~7% halogen-free flame retardants, 2%~ 6% compatilizer, 0.4%~1.0% antioxidant and 0.2%~1.0% lubricant are added to mixer mixing;
(2) the above-mentioned material mixed is put into the main feeding hopper of double screw extruder, in side feeding hopper add 10%~ 40% glass fibre, by double screw extruder extruding pelletization, high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material is made.
As preferable, the incorporation time is 3~5min, and the rotating speed of double screw extruder is 200~500r/min, temperature Spend for 250~290 DEG C.
Compared with prior art, the beneficial effects of the present invention are:
1st, it is compound from the syndiotactic polytyrene (sPS) and polyphenylene oxide (PPO) of excellent heat resistance, obtained polyphenylene oxide/ The heat resistance of stereospecific polymerized styrene (PPO/sPS) alloy far above polyphenyl ether/styrene (PPO/PS) and polyphenylene oxide/acrylonitrile- The alloys such as butadiene-styrene (PPO/ABS).
2nd, red phosphor masterbatch is used as fire retardant, on the premise of material halogen-free flameproof is realized, avoids traditional phosphoric acid ester Halogen-free flame retardants is carrier to heat-resisting bad effect, while from HIPS, ensure that compatibility.
3rd, using polyphenylene oxide grafted maleic anhydride (PPO-g-MAH) and syndiotactic polytyrene grafted maleic anhydride (sPS-g- MAH) it is used as compatilizer, it is possible to increase the interface cohesion of resin and glass fibre, improve the processing characteristics of material, improve material Mechanical performance.
4th, technique of the invention is simple, and processing characteristics is good, and obtained halogen-free fire-retardant polyphenyl ether has good mechanical performance, Heat resistance is good, can be used for the family electric car high to anti-flammability and heat resistant requirements and the field such as electric.
Embodiment
, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer Technical scheme be clearly and completely described, it is clear that described embodiment is part of the embodiment of the present invention, rather than Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, belongs to the scope of protection of the invention.
A kind of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material, the composite is by following components Composition:Polyphenylene oxide 30%~50%, syndiotactic polytyrene 15%~50%, glass fibre 10%~40%, halogen-free flame retardants 1% ~7%, compatilizer 2%~6%, antioxidant 0.4%~1.0%, lubricant 0.2%~1.0%.
The intrinsic viscosity that the polyphenylene oxide determines in 25 DEG C of chloroforms is 0.35~0.65dL/g.
The syndiotactic polytyrene is high-impact syndiotactic polytyrene, and its Izod notched impact strength is more than 10KJ/m2
The glass fibre is alkali-free glass fiber, and filament diameter is 7~17 μm, 3~24mm of chopped length.
The halogen-free flame retardants is the red phosphor masterbatch that impact resistant polystyrene is carrier.The red phosphor masterbatch is to pass through weight Amount percentage for 40%~60%, 500~1500 mesh red phosphorus first pass through stabilizer, low-molecular-weight wax cladding after again with impact resistance The red phosphor masterbatch that polystyrene extruding pelletization obtains.
The compatilizer is at least one of polyphenylene oxide grafted maleic anhydride or syndiotactic polytyrene grafted maleic anhydride.
Described antioxidant is the compounding antioxidant system of hindered phenol, phosphite ester and acid-acceptor composition.
Described lubricant is pentaerythritol stearate.
A kind of preparation method of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material, comprises the following steps:By 30%~50% Polyphenylene oxide, 15%~50% syndiotactic polytyrene, 1%~7% halogen-free flame retardants, 2%~6% compatilizer, 0.4%~1.0% Antioxidant and 0.2%~1.0% lubricant are added to mixer mixing, and incorporation time is 3~5min, is then placed in twin-screw and squeezes Go out the main feeding hopper of machine, feeding hopper adds 10%~40% glass fibre in side, passes through double screw extruder extruding pelletization, system Obtain high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material.Wherein, the rotating speed of double screw extruder is 200~500r/min, and temperature is 250~290 DEG C.
The embodiment of the present invention and comparative example are molded into the standard batten of test according to standard requirement and tested.Its In, vertical combustion according to UL94 standards, Izod notched impact strength according to ISO180 standards, heat distortion temperature test according to ISO75-2 standards.
The raw material used in the embodiment of the present invention and comparative example is as follows:
Polyphenylene oxide:LXR040 (intrinsic viscosity 0.40dL/g (25 DEG C of chloroforms)), Lanxing Chemical New Material Co., Ltd..
Syndiotactic polytyrene:XARECTMS105 (Izod notched impact strength 20KJ/m2, ISO180,23 DEG C), Japan goes out Light (Idemitsu) company.
Impact resistant polystyrene:HIPS PH88, Taiwan Qi Mei companies.
Glass ECS306:13 μm, chopped length 3mm of filament diameter, Chongqing Polycomp International Co., Ltd.
Compatilizer:CX-1 (PPO-g-MAH), Japanese light extraction (Idemitsu) company;9012PA (sPS-g-MAH), Germany Bi Ke (BYK) company.
Halogen-free flame retardants:REDNIC 30450N3 (red phosphor masterbatch, red phosphorus content 50%, HIPS carriers);WSFR-PX-220 (oligomeric aryl phosphate ester), Zhejiang Wansheng Co., Ltd..
Antioxidant:Hindered phenol 1010 (four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters), phosphorous Acid esters 168 (three [2.4- di-tert-butyl-phenyls] phosphite esters), Switzerland's vapour bar (Ciba) company;Acid-acceptor ZnO (Hhx121), it is black Bo Hai is along Xin Ye Co., Ltds.
Lubricant:PETS (pentaerythritol stearate), husky (Lonza) company of U.S. dragon.
As shown in Table 1 and Table 2, comparative example 1~5 matches somebody with somebody when performance such as table 3 and table 4 to the when performance of matching somebody with somebody of embodiment 1~5 It is shown.
The composition of the high heat-resistant halogen-free flame-retardant polyphenylene oxide of table 1
The performance of the high heat-resistant halogen-free flame-retardant polyphenylene oxide of table 2
Remarks:V0, V1 are flame retardant rating, V0 grade highests.
The contrast test halogen-free flameproof PPO of table 3 composition
The contrast test halogen-free flameproof PPO of table 4 performance
Remarks:Off grade represents that test bars are burnt to fixture always.
It can be seen from the contrast of above-described embodiment 1 and comparative example 1, compared with impact resistant polystyrene (HIPS), use The syndiotactic polytyrene (sPS) and polyphenylene oxide (PPO) of high-impact are compound, and the heat distortion temperature of obtained halogen-free fire-retardant polyphenyl ether is bright It is aobvious to improve.This is due to that syndiotactic polytyrene is the crystalline material that fusing point is up to 270 DEG C, and impact resistant polystyrene is then Glass transition temperature is 90 DEG C of indefinite form material.
Pass through the contrast of embodiment 3 and comparative example 2 and comparative example 3:(1) phosphate flame retardant PX220 equal proportions are replaced Red phosphor masterbatch 30450N3 is changed, anti-flammability is decreased obviously, and is changed into not obtaining flame retardant rating from original V0 ranks, in order to reach V0 ranks, Need to greatly increase the dosage of fire retardant, this is due to that PX220 available phosphorus content only has 10% or so, far below red phosphor masterbatch 30450N3 phosphorus content.(2) phosphate flame retardant PX220 addition reduces the heat distortion temperature of halogen-free fire-retardant polyphenyl ether, and And with the increase of its content, heat distortion temperature reduction is more, and this is due to that phosphate flame retardant PX220 has obvious plasticising to make With the heat distortion temperature of material can be lowered.
By the contrast of embodiment 2 and comparative example 4, syndiotactic polytyrene grafted maleic anhydride (sPS-g-MAH) The impact strength of material can be significantly improved by adding, and this is due to the adhesion that its addition can improve resin and glass, so as to Improve the ability of material resistance external impacts.In addition, the addition of syndiotactic polytyrene grafted maleic anhydride (sPS-g-MAH) passes through Improve the mechanical performance of material so that the heat distortion temperature of material also increases.Pass through the contrast of embodiment 4 and comparative example 5 Understand, polyphenylene oxide grafted maleic anhydride (PPO-g-MAH), which equally has, improves halogen-free fire-retardant polyphenyl ether impact strength and thermal deformation The effect of temperature.
In summary, compound with conventionally employed indefinite form polystyrene and polyphenylene oxide and use phosphate flame retardant is modified phase Than the present invention from high heat-resisting syndiotactic polystyrene resin, the red phosphor masterbatch of high content of phosphorus and glass polyphenylene ether by being entered Row halogen-free flameproof is modified, and can obtain high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material.In addition, it is base by adding PPO or sPS The graft of body is compatilizer, can improve the impact property of high heat-resistant halogen-free flame-retardant polyphenylene oxide.The high heat-resistant halogen-free of the present invention Flame-proof polyphenylene oxide composite material can be used for the family electric car high to anti-flammability and heat resistant requirements and the field such as electric.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification, Equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (7)

1. a kind of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material, it is characterised in that the composite is by following percentage by weight Component than meter forms:
Wherein, the halogen-free flame retardants is the red phosphor masterbatch that impact resistant polystyrene is carrier, and the red phosphor masterbatch is to pass through Percentage by weight for 40%~60%, 500~1500 mesh red phosphorus first pass through stabilizer, low-molecular-weight wax cladding after again with impact resistance The red phosphor masterbatch that property polystyrene extruding pelletization obtains;
The intrinsic viscosity that the polyphenylene oxide determines in 25 DEG C of chloroforms is 0.35~0.65dL/g;
The glass fibre is alkali-free glass fiber, and filament diameter is 7~17 μm, 3~24mm of chopped length.
2. high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material according to claim 1, it is characterised in that polyphenyl is advised between described Ethene is high-impact syndiotactic polytyrene, and its Izod notched impact strength is more than 10KJ/m2
3. high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material according to claim 1, it is characterised in that the compatilizer is At least one of polyphenylene oxide grafted maleic anhydride or syndiotactic polytyrene grafted maleic anhydride.
4. high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material according to claim 1, it is characterised in that described antioxidant For the compounding antioxidant system of hindered phenol, phosphite ester and acid-acceptor composition.
5. high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material according to claim 1, it is characterised in that described lubricant For pentaerythritol stearate.
A kind of 6. preparation side of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material as described in any one in Claims 1 to 5 Method, it is characterised in that this method comprises the following steps:
(1) by 30%~50% polyphenylene oxide, 15%~50% syndiotactic polytyrene, 1%~7% halogen-free flame retardants, 2%~6% Compatilizer, 0.4%~1.0% antioxidant and 0.2%~1.0% lubricant are added to mixer mixing;
(2) the above-mentioned material mixed is put into the main feeding hopper of double screw extruder, feeding hopper adds 10%~40% in side Glass fibre, by double screw extruder extruding pelletization, high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material is made.
7. the preparation method of high heat-resistant halogen-free flame-retardant polyphenylene oxide composite material according to claim 6, it is characterised in that institute It is 3~5min to state incorporation time, and the rotating speed of double screw extruder is 200~500r/min, and temperature is 250~290 DEG C.
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