CN103923427A - Halogen-free flame retardant and heat resistant HIPS (high impact polystyrene) plastic for automotive interior trim parts and preparation method thereof - Google Patents
Halogen-free flame retardant and heat resistant HIPS (high impact polystyrene) plastic for automotive interior trim parts and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a halogen-free flame retardant and heat resistant HIPS (high impact polystyrene) plastic for automotive interior trim parts and a preparation method thereof. The halogen-free flame retardant and heat resistant HIPS plastic comprises the following components in parts by weight: 100 parts of HIPS resin, 2-15 parts of flame retardant and 1-8 parts of heat resistant agent, wherein preferably, the flame retardant is one of or a mixture of more of ammonium polyphosphate, montmorillonite, melamine cyanurate and aluminium hydroxide; the heat resistant agent is one of or a mixture of more of magnesium stearate, methyltin tris(isooctyl thioglycollate), dibutyltin dilaurate and tris(4-nonylphenyl)phosphite. The halogen-free flame retardant and heat resistant HIPS plastic is low in production cost, has good processability, flame retardance and heat resistance, is environment-friendly, and is particularly suitable for preparing various automotive interior trim parts through injection molding.
Description
Technical field
The invention belongs to chemical material technical field, be specifically related to a kind of modification HIPS plastics and preparation method thereof, relate in particular to heat-resisting HIPS plastics of a kind of automotive upholstery halogen-free flameproof and preparation method thereof.
Background technology
Impact resistant polystyrene (HIPS) is the shock proof polystyrene products of one that the way by add poly-isoprene-isobutylene rubber particle in polystyrene is produced.This polystyrene products can add micron order rubber grain and by the way of scion grafting, polystyrene and rubber grain be linked together.In the time being subject to impacting, the point stresses of crack propagation can be discharged by relatively soft rubber grain.Therefore the expansion of crackle is hindered, and shock resistance is improved.
Polystyrene is a kind of broad-spectrum brittle plastic.The case of computer that you are using is now exactly polystyrene.Transparent plastic cup, wrapping porous plastics is also made up of polystyrene.Polystyrene belongs to polyolefine, is formed by radical polymerization by vinylbenzene.Can obtain a kind of novel polyphenyl ethene by polymerization catalyzed by metallocene, i.e. syndiotactic polystyrene (syndiotactic).The both sides of the main chain that the phenyl ring on syndiotactic polystyrene alternately connects, and the phenyl ring of ordinary polystyrene is randomly being connected to main chain both sides.Syndiotactic polystyrene (syndiotactic) is crystalline polymers, and fusing point reaches 270 DEG C.In in styrene polymerization system, add polyhutadiene, make vinylbenzene graft polymerization on polyhutadiene main chain.Polystyrene and polyhutadiene are inconsistent, and therefore vinylbenzene and divinyl segment are assembled respectively, and generation is separated.These polyhutadiene phase regions can impact-absorbing energy, thereby has improved the opaque particle of shock strength HIPS engineering plastics oyster white of polystyrene, and density is 1.05g/cm
3, 150～180 DEG C of melt temperatures, 300 DEG C of heat decomposition temperatures, are dissolved in aromatic hydrocarbon, chlorinated hydrocarbon, ketone (except your ketone) and ester class. the much mineral oil of ability, organic acid, alkali, salt, lower alcohol and the aqueous solution thereof, not resistance to boiling water.
HIPS is one of the most cheap engineering plastics, and ABS, PC/ABS, PC compares, the glossiness of material is poor, over-all properties also relative mistake some.HIPS adds divinyl modification by PS and forms, because the shock strength of PS is very low, the product of making is very crisp, and the toughness of divinyl is fine, adds and can make after divinyl the impact property of PS improve 2～3 times.Although the shock strength of HIPS exceeds much than the shock strength of PS, but its over-all properties is still not as ABS, the impact property of the .HIPS such as PC/ABS is lower in engineering plastics, and therefore, we should note the inspection of the impact property to material in the time using this material.
High impact polystyrene, in order to meet the requirement of toughness material, nineteen fifty starts to develop rubber modified polystyrene (high impact polystyrene is HIPS).By rubber being added to polystyrene base material, can produce the high impact polystyrene of the various grades with different performance.In recent years, develop the HIPS of various special grades, as anti-stress cracking level, high glossiness level, high shock strength level, glass fibre booster stage and low residue volatilization classification etc., they can compete mutually with expensive engineering resin in many Application Areass.The outstanding characteristic of High Impact Polystyrene (HIPS) is that easy processing, excellent in dimensional stability, shock strength are high and have a high stiffness.Be in thermotolerance for HIPS.There is certain limit oxygen permeability, ultraviolet light stability and oil resistant moral character aspect.Chemistry and performance High Impact Polystyrene (HIPS) make by polybutadiene rubber was dissolved in to styrene monomer before polyreaction.Although can use suspension polymerization legal system HIPS, what current industrial production HIPS adopted is mainly mass polymerization.In bulk polymerisation process, the mixture of styrene monomer/rubber/additive is by series reaction device, and transformation efficiency reaches 70～90%.
Other key property of standard HIPS is as follows: flexural strength 13.8～55.1MPa; Tensile strength 13.8-41.4MPa; Elongation at break is 15-75%; Density 1.035-1.04g/ml; Vicat softening point 185-220 °F.
The unique industrialized HIPS of mixing alloy is the blend of itself and polyphenylene oxide.The thermotolerance of this blend and toughness are all very outstanding, but product price is more much higher than the product of alone HIPS.
The development of polystyrene technology can be produced factory to have the more grade of outstanding properties compared with standard level PS.Many performances of polystyrene can not hold concurrently and, as wish improve resistance to impact shock, the glossiness etc. of just having to sacrifice.Some new type resins that occur at present, they have the glossiness of ABS, also have very high toughness simultaneously.Some grade is as when the wrap food, can resistance to various greases and also the developing of ability Chlorofluorocarbons (CFCs) (CFC) whipping agent during for rerigerator.Flame retardant grade (UL V-0 and UL5-V), High Impact Polystyrene (HIPS) has produces and is widely used in television cabin, business machine and electrical apparatus product.The process operation of these resins is more easier than many fire-retardant engineering resins, and price is also lower.
Shock resistance PS can process with many traditional forming methods, as injection moulding, structural foam moding, sheet material and film extrusion, thermoforming and injection blow molding moulding etc.It is slower that HIPS resin absorbs moisture, therefore generally do not need to be dried.Sometimes the excess moisture of material surface can be absorbed, thereby affects the visual appearance of the finished product.Under 160 °F, dry 2-3h just can remove unnecessary moisture.
The extrusion molding of film, sheet material and section bar is HIPS processing molding method with the most use.The work range of High Impact Polystyrene (HIPS) is very wide, and therefore it becomes one of resin of the easiest thermoforming.The common extrusion apparatus resin melting temperature of general use is 400-500 °F, and the melt index range of resin is 1.5-4.0g/10min.Also often adopt rotary, series connection and pressure and vacuum thermoforming equipment shuttle-type.HIPS has excellent shear stability, can connect the reclaimed materials by volume, and not reduce product performance, and the reclaimed materials usage quantity in thermoforming processing can be up to 60%.
Injection moulding is the processing molding method with the most use that is only second to extrusion molding.The injection moulding of resin is to be generally to carry out on 16:1-24:1, the compression ratio reciprocating screw injection moulding machine that is 2.5/1-3.0/1 in length-to-diameter ratio.Adopt its melt index of resin of injection molding forming method processing to be generally 5.0～15.0g/min.Structural foam moding method is conventional technique, adopts chemistry and pneumatogen.
Although various HIPS resins are compatible by this, but wanted surface cleaning equipment before operation, to ensure good quality product, shock resistance PS is all incompatible with acrylonitrile one fourth Th alkene one styrol copolymer (ABS), polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), acrylic resin and other most of plastics, inconsistent plastics mixture can produce separating delamination phenomenon in processing units, causes the very big decline of physicals.
Shock resistance PS has workability, good performance and low price, is therefore used to manufacture permitted multiduty goods and Industrial products.Main application fields has packaging and disposable product, instrument, household electrical appliance, toy and amusement article and building trade.
The single-minded purposes of maximum of HIPS is as packaging and disposable product material, particularly packaging material for food and tableware for food and drink.Main application comprises daily packaging vessel.Vending machine is used and cup, various cover cap, dish, bowl etc. for packing.Disposable product as dish class, bottle cap, safety razor, penholder etc. be also a part of purposes that HIPS consumption is large.
In recent years, Special Products becomes the emphasis of HIPS product development.HIPS product newly developed can be competed with engineering resin in some Application Areas, the used quality product of some ratios is much higher, instrument and consumer appliances are one of ever-increasing market of HIPS product, comprise miniature instrument, refrigerator inwall and internals, housing of TV set, air supply rate, business machine and recording picture recording tape cassete.HIPS resin has replaced the high engineering plastics of valency in a lot of fields, but the heat-resisting and flame retardant properties of HIPS resin is not so good, and these shortcomings have seriously limited the application of HIPS resin.
Halogen containing polymers or have good flame retardant properties with the flame-retardant mixture that halogen containing flame-retardant combines, Zeng Zuowei resistance alkene material is widely used.
But when fire occurs, this class Halogen fire retardant material can produce a large amount of smog and poisonous corrosive hydrogen halides gas, cause into secondary harm.Therefore the flame-retardant system of invention Halogen, when burning, the amount of being fuming is little, does not produce poisonous, corrosive gases, has important practical significance.
Summary of the invention
For above shortcomings in prior art, technical problem to be solved by this invention is to provide the heat-resisting HIPS plastics of a kind of automotive upholstery halogen-free flameproof, has good anti-flame retardant resistance and thermotolerance, and the amount of being fuming is little when burning, do not produce poisonous, corrosive gases, avoid secondary pollution.
The present invention seeks to be achieved through the following technical solutions:
One is the heat-resisting HIPS plastics of halogen-free flameproof for automotive upholstery, comprise the component of following weight parts:
100 parts of HIPS resins,
Fire retardant 2-15 part,
Heat-resistant agent 1-8 part.
Preferably, described automotive upholstery comprises the component of following weight parts with the heat-resisting HIPS plastics of halogen-free flameproof:
100 parts of HIPS resins,
Fire retardant 5-15 part,
Heat-resistant agent 4-8 part.
Preferably,
Described fire retardant is one or more the mixture in ammonium polyphosphate, polynite, melamine cyanurate and aluminium hydroxide;
Described heat-resistant agent is one or more the mixture in Magnesium Stearate, methyl tin three (isooctyl mercaptoacetate), dibutyl tin laurate and three (4-nonyl phenyl) phosphorous acid ester;
It is further preferred,
Described fire retardant is made up of the component of following weight parts:
It is further preferred,
Described heat-resistant agent is made up of the component of following weight parts:
It is preferred,
The heat-resisting HIPS plastics of halogen-free flameproof for described automotive upholstery, is characterized in that, comprise the component of following weight parts:
The present invention also provides the preparation method of the heat-resisting HIPS plastics of above-mentioned automotive upholstery halogen-free flameproof, and it comprises the following steps: take raw material by proportioning, fully mix after 5-10 minute at a high speed, add twin screw extruder, at 170-200 DEG C of extruding pelletization.
Obviously, for improving other performances of product, can also add adaptively other auxiliary agents, as heat-resistant agent, antiaging agent, scratch resistant agent, lubricant, photostabilizer, oxidation inhibitor, nucleator, softening agent, tinting material and static inhibitor etc. in the present invention.
In the present invention,
Ammonium polyphosphate, claims again ammonium polyphosphate or polycondensation ammonium phosphate, is called for short APP, English name: ammonium polyphosphate; Polyphosphoric acids ammonium salts, CAS numbering: 68333-79-9.The branchiess long chain polymer of ammonium polyphosphate, the polymerization degree is preferably 21-26.
Polynite, English name: Montmorillonite, No. CAS: 1318-93-0.
Melamine cyanurate, No. CAS: 37640-57-6.
Aluminium hydroxide, No. CAS: 21645-51-2.
Magnesium Stearate, No. CAS: 557-04-0.
Methyl tin three (isooctyl mercaptoacetate), No. CAS: 57583-34-3.
Dibutyl tin laurate, No. CAS: 77-58-7.
Three (4-nonyl phenyl) phosphorous acid ester, No. CAS: 3050-88-2.
Contriver finds by great many of experiments, use fire retardant of the present invention and heat-resistant agent, can effectively strengthen HIPS flame retardant of plastic performance and resistance toheat, especially use the compound flame retardant of ammonium polyphosphate, polynite, melamine cyanurate and aluminium hydroxide, have the flame retardant effect of synergy, and do not contain haloid element in compound flame retardant, when burning, the amount of being fuming is little, do not produce poisonous, corrosive gases, avoid secondary pollution.Use the composite heat-resistant agent of Magnesium Stearate, methyl tin three (isooctyl mercaptoacetate), dibutyl tin laurate and three (4-nonyl phenyl) phosphorous acid ester, have collaborative heat-resisting effect, its mechanism need the further research and inquirement of contriver.Meanwhile, it draws high the conventional parameters such as intensity, flexural strength, modulus in flexure and notched Izod impact strength and all meets the demands.
The preparation technology of this product is simple, and product cost is low, and the over-all properties of product is more excellent.Flame-proof heat-resistant HIPS plastics for automotive upholstery of the present invention, can be processed into easily by Shooting Technique the part of different shape, can be used for making automobile inside gadget.
Embodiment
Below in conjunction with embodiment, the invention will be further described.The HIPS resin using in the embodiment of the present invention and comparative example, buys from Shanghai Ying Fei Industrial Co., Ltd..
Embodiment 1
Take each flame retardant compositions according to embodiment 1 data corresponding in table 1, after fully mixing, obtain the compound flame retardant of embodiment 1;
Get 5 kilograms of 100 kilograms of HIPS resins, Magnesium Stearates after drying treatment and the compound flame retardant of embodiment 1, fully mix after 10 minutes at a high speed, add the spout of twin screw extruder; Control the rotating speed of twin screw extruder at 300rpm, temperature, at 200 DEG C, by twin screw extruder extruding pelletization, obtains the heat-resisting HIPS plastics of automotive upholstery halogen-free flameproof of embodiment 1.
Table 1: the HIPS fire-retardant for plastic formula table unit of embodiment 1-7: kilogram
| ? | Ammonium polyphosphate | Polynite | Melamine cyanurate | Aluminium hydroxide |
| Embodiment 1 | 1.5 | 2 | 5 | 2 |
| Embodiment 2 | 1 | 2.5 | 4 | 3 |
| Embodiment 3 | 1.5 | 2 | 7 | / |
| Embodiment 4 | 6.5 | 2 | / | 2 |
| Embodiment 5 | 3.5 | / | 5 | 2 |
| Embodiment 6 | / | 3.5 | 5 | 2 |
| Embodiment 7 | 10.5 | / | / | / |
Embodiment 2
Take each flame retardant compositions according to embodiment 2 data corresponding in table 1, after fully mixing, obtain the compound flame retardant of embodiment 2;
According to method described in embodiment 1, obtain the heat-resisting HIPS plastics of automotive upholstery halogen-free flameproof of embodiment 2.
Embodiment 3
Take each flame retardant compositions according to embodiment 3 data corresponding in table 1, after fully mixing, obtain the compound flame retardant of embodiment 3;
According to method described in embodiment 1, obtain the heat-resisting HIPS plastics of automotive upholstery halogen-free flameproof of embodiment 3.
Embodiment 4
Take each flame retardant compositions according to embodiment 4 data corresponding in table 1, after fully mixing, obtain the compound flame retardant of embodiment 4;
According to method described in embodiment 1, obtain the heat-resisting HIPS plastics of automotive upholstery halogen-free flameproof of embodiment 4.
Embodiment 5
Take each flame retardant compositions according to embodiment 5 data corresponding in table 1, after fully mixing, obtain the compound flame retardant of embodiment 5;
According to method described in embodiment 1, obtain the heat-resisting HIPS plastics of automotive upholstery halogen-free flameproof of embodiment 5.
Embodiment 6
Take each flame retardant compositions according to embodiment 6 data corresponding in table 1, after fully mixing, obtain the compound flame retardant of embodiment 6;
According to method described in embodiment 1, obtain the heat-resisting HIPS plastics of automotive upholstery halogen-free flameproof of embodiment 6.
Embodiment 7
Take each flame retardant compositions according to embodiment 7 data corresponding in table 1, after fully mixing, obtain the compound flame retardant of embodiment 7;
According to method described in embodiment 1, obtain the heat-resisting HIPS plastics of automotive upholstery halogen-free flameproof of embodiment 7.
Test case 1
HIPS flame retardant of plastic to embodiment 1-7 is tested, and test result is in table 2.
Table 2: the HIPS plastic flame test chart of embodiment 1-7
| ? | UL-94 flame retardant rating, (1.6mm) | LOI，％ | Smoke density, m 2/kg |
| Embodiment 1 | V0 | 32.8 | 970 |
| Embodiment 2 | V0 | 31.6 | 981 |
| Embodiment 3 | V1 | 27.4 | 1050 |
| Embodiment 4 | V0 | 29.3 | 992 |
| Embodiment 5 | V1 | 27.2 | 1024 |
| Embodiment 6 | V0 | 30.1 | 1002 |
| Embodiment 7 | V2 | 25.9 | 1195 |
HIPS flame retardant of plastic to embodiment 1-7 is tested, found that the HIPS plastics that embodiment 1-7 makes all have certain flame retardant resistance, especially embodiment 1-2 has used the compound flame retardant that ammonium polyphosphate, polynite, melamine cyanurate and aluminium hydroxide are made, be compared to embodiment 3-7, in the situation that adding same ratio fire retardant, oxygen index LOI value is brought up to 31.6%-32.8% from 25.9%-30.1%, and smoke density is from 1195-992m
2/ kg has been reduced to 970-981m
2/ kg, flame retardant effect is very obvious, more excellent for HIPS flame retardant of plastic effect especially.
Embodiment 8
Take various heat-resistant agent components according to embodiment 8 data corresponding in table 3, get 10.5 kilograms of the compound flame retardants of 100 kilograms of HIPS resins after drying treatment and embodiment 1, fully mix at a high speed after 10 minutes, they are added from the spout of twin screw extruder, control the rotating speed of screw extrusion press at 300rpm, temperature, at 200 DEG C, by screw extrusion press extruding pelletization, obtains the heat-resisting HIPS plastics of automotive upholstery halogen-free flameproof of embodiment 8.
Table 3: the HIPS plastics heat-resistant agent formula table unit of embodiment 8-13: kilogram
| ? | Magnesium Stearate | Methyl tin three (isooctyl mercaptoacetate) | Dibutyl tin laurate | Three (4-nonyl phenyl) phosphorous acid ester |
| Embodiment 8 | 1 | 1 | 2 | 1 |
| Embodiment 9 | 1 | 1 | 3 | / |
| Embodiment 10 | 1 | 1 | / | 3 |
| Embodiment 11 | 2 | / | 2 | 1 |
| Embodiment 12 | / | 2 | 2 | 1 |
| Embodiment 13 | 5 | / | / | / |
Embodiment 9
Take various heat-resistant agent components according to embodiment 9 data corresponding in table 3, according to method described in embodiment 8, obtain the automotive upholstery flame-proof heat-resistant HIPS plastics of embodiment 9.
Embodiment 10
Take various heat-resistant agent components according to embodiment 10 data corresponding in table 3, according to method described in embodiment 8, obtain the automotive upholstery flame-proof heat-resistant HIPS plastics of embodiment 10.
Embodiment 11
Take various heat-resistant agent components according to embodiment 11 data corresponding in table 3, according to method described in embodiment 8, obtain the automotive upholstery flame-proof heat-resistant HIPS plastics of embodiment 11.
Embodiment 12
Take various heat-resistant agent components according to embodiment 12 data corresponding in table 3, according to method described in embodiment 8, obtain the automotive upholstery flame-proof heat-resistant HIPS plastics of embodiment 12.
Embodiment 13
Take various heat-resistant agent components according to embodiment 13 data corresponding in table 3, according to method described in embodiment 8, obtain the automotive upholstery flame-proof heat-resistant HIPS plastics of embodiment 13.
Test case 2
The resistance toheat of the HIPS plastics to embodiment 8-13 is tested, and tests its heat-drawn wire (HDT, 1.8MPa), and test result is in table 4.
Table 4: the HIPS plastics thermotolerance test chart of embodiment 8-13
| ? | Heat-drawn wire/DEG C |
| Embodiment 8 | 129 |
| Embodiment 9 | 109 |
| Embodiment 10 | 121 |
| Embodiment 11 | 119 |
| Embodiment 12 | 114 |
| Embodiment 13 | 102 |
By the test result in table 4, the heat-drawn wire of the HIPS plastics that embodiment 8-13 makes is all significantly improved, especially embodiment 8 has used the composite heat-resistant agent of Magnesium Stearate, methyl tin three (isooctyl mercaptoacetate), dibutyl tin laurate and three (4-nonyl phenyl) phosphorous acid ester, be compared to embodiment 9-13, in the case of using the heat-resistant agent of equal consumption, heat-drawn wire is higher, has strengthened more significantly the resistance toheat of HIPS plastics.
Therefore, the heat-resisting HIPS plastics of halogen-free flameproof of the present invention can significantly improve flame retardant resistance, thermotolerance, and preparation technology is simple, and product cost is low, and the over-all properties of product is more excellent.Can also add adaptively other auxiliary agents, as antiaging agent, lubricant, photostabilizer, oxidation inhibitor, nucleator, softening agent, tinting material and static inhibitor etc., in order to improve other aspect performances.
Flame-proof heat-resistant HIPS plastics for automotive upholstery of the present invention, can be processed into easily by Shooting Technique the part of different shape, can be used for making automobile inside gadget.
The above; it is only the specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; the variation that can expect without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (9)
1. the heat-resisting HIPS plastics of halogen-free flameproof for automotive upholstery, is characterized in that, comprise the component of following weight parts:
100 parts of HIPS resins,
Fire retardant 2-15 part,
Heat-resistant agent 1-8 part.
2. the heat-resisting HIPS plastics of halogen-free flameproof for automotive upholstery as claimed in claim 1, is characterized in that, comprise the component of following weight parts:
100 parts of HIPS resins,
Fire retardant 5-15 part,
Heat-resistant agent 4-8 part.
3. the heat-resisting HIPS plastics of halogen-free flameproof for automotive upholstery as claimed in claim 1, is characterized in that, described fire retardant is one or more the mixture in ammonium polyphosphate, polynite, melamine cyanurate and aluminium hydroxide.
4. the heat-resisting HIPS plastics of halogen-free flameproof for automotive upholstery as claimed in claim 3, is characterized in that, described fire retardant is made up of the component of following weight parts:
5. the heat-resisting HIPS plastics of halogen-free flameproof for automotive upholstery as claimed in claim 3, is characterized in that, the polymerization degree of described ammonium polyphosphate is 21-26.
6. the heat-resisting HIPS plastics of halogen-free flameproof for automotive upholstery as claimed in claim 1, it is characterized in that, described heat-resistant agent is one or more the mixture in Magnesium Stearate, methyl tin three (isooctyl mercaptoacetate), dibutyl tin laurate and three (4-nonyl phenyl) phosphorous acid ester.
7. the heat-resisting HIPS plastics of halogen-free flameproof for automotive upholstery as claimed in claim 6, is characterized in that, described heat-resistant agent is made up of the component of following weight parts:
8. the heat-resisting HIPS plastics of halogen-free flameproof for automotive upholstery as claimed in claim 1, is characterized in that, comprise the component of following weight parts:
9. the preparation method of the heat-resisting HIPS plastics of halogen-free flameproof for the automotive upholstery as described in any one in claim 1-8, it is characterized in that, comprise the following steps: take raw material by proportioning, fully mix at a high speed after 5-10 minute, add twin screw extruder, at 170-200 DEG C of extruding pelletization.
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| CN107828139A (en) * | 2017-10-12 | 2018-03-23 | 费全中 | Household electrical appliances flame-retarding HIPS plastics and its production technology |
| CN109517315A (en) * | 2018-11-16 | 2019-03-26 | 上海瀚氏科技集团有限公司 | Automotive upholstery antibiotic plastic and its production technology |
| CN109735017A (en) * | 2019-01-15 | 2019-05-10 | 胡敏悫 | A kind of penholder and its production technology |
| CN115181344A (en) * | 2022-07-28 | 2022-10-14 | 金发科技股份有限公司 | High-heat-resistance flame-retardant HIPS material and preparation method and application thereof |
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