CN103819865A - Environment-friendly flame-retardant modified HIPS (high impact polystyrene) LCDTV (liquid crystal display television) casing and preparation method thereof - Google Patents

Environment-friendly flame-retardant modified HIPS (high impact polystyrene) LCDTV (liquid crystal display television) casing and preparation method thereof Download PDF

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Publication number
CN103819865A
CN103819865A CN201410083104.3A CN201410083104A CN103819865A CN 103819865 A CN103819865 A CN 103819865A CN 201410083104 A CN201410083104 A CN 201410083104A CN 103819865 A CN103819865 A CN 103819865A
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temperature
district
hips
casing
retardant modified
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CN103819865B (en
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张军
田挺胜
徐国忠
刘涛
钱建培
杨双
柴瑞丹
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Nanjing Tech University
Nanjing Huage Electronics and Automobile Plastic Industry Co Ltd
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Nanjing Tech University
Nanjing Huage Electronics and Automobile Plastic Industry Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/72—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7461—Combinations of dissimilar mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/9218—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92333—Raw material handling or dosing, e.g. active hopper or feeding device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92676—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone

Abstract

The invention discloses an environment-friendly flame-retardant modified HIPS (high impact polystyrene) LCDTV (liquid crystal display television) casing and a preparation method thereof. The flame-retardant modified HIPS LCDTV casing contains no toxic and harmful substances such as polybrominated biphenyls, poly brominated diphenyl ethers and the like, the restriction of the use of certain hazardous substances in electrical and electronic equipment and REACH (registration, evaluation, authorization and restriction of chemicals) regulation requirements are met, and the flammability meets the UL-94V-0 grade. The environment-friendly flame-retardant modified HIPS LCDTV casing comprises raw materials by mass as follows: 45-70 parts of HIPS resin, 5-30 parts of GPPS (general purpose polystyrene) resin, 5-10 parts of thermoplastic styrene butadiene rubber SBS, 10-16 parts of decabromodiphenyl ethane, 4-6 parts of antimonous trioxide, 3-7 parts of mineral oil, 0.2-0.5 part of an antioxidant B215, 0.5-1.0 part of a lubricant and 0.9-1.5 parts of carbon black.

Description

Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set and preparation method thereof
Technical field
The present invention relates to a kind of HIPS casing of liquid crystal television set and preparation method thereof, more specifically to environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of one and preparation method thereof.
Background technology
Synthetic resins is by adopting the family macromolecule polymkeric substance that synthesize by chemical process of polymerisable monomer, and the most important application of synthetic resins is manufacture plastics, in addition for the manufacture of the basic material of synthon, coating, tackiness agent etc.According to the monomer difference using, synthetic resins is of a great variety, wherein polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and acrylonitrile-butadiene-styrene copolymer (ABS) are called five large resins for universal use, are the synthetic resins materials being most widely used.Polystyrene claims again general purpose polystyrene (GPPS), and the GPPS of large-scale industrial production is the simple linear polymer being obtained by radical polymerization by styrene monomer.GPPS is amorphous thermoplastics, has the excellent transparency, second-order transition temperature T git is 100 ℃.Compared with the soft pvc of crystallization thermoplastic phase material (as PE and PP) or plasticizer-containing, GPPS also has higher rigidity, this is because the side group phenyl ring in GPPS linear structure has larger space steric effect, increase the rigidity of molecule, therefore it has excellent mechanical property, as higher tensile strength, tensile modulus, flexural strength, modulus in flexure.Because having larger space steric effect, the side group phenyl ring in GPPS linear structure cause it to change the ability variation of chain conformation equally, finally make the flexible decline of its chain, the plastics shock strength that adopts GPPS resin to make is extremely low, has limited the application in some occasions.In order to improve the fragility of GPPS, the shock proof polystyrene products of one that can produce by add the method for polybutadiene rubber in polystyrene resin polymerization process, are referred to as high-impact polystyrene (HIPS).Now, industrial main employing continuous bulk solution method is produced HIPS resin, and the fine grain size rubber grain adding is linked together polystyrene and rubber grain by the method for scion grafting.In the time that HIPS is subject to impacting, rubber phase can be used as the induction of stress concentration thing and produces crazing, hinders further expanding of crazing simultaneously, and shock resistance is improved.HIPS has splendid cost performance, between performance and price, can reach gratifying balance.Compare with GPPS, HIPS, except having excellent shock resistance, also has good surface luster property, tensile strength, flexural strength and certain thermotolerance.In addition very good its easy-formation that makes of thermostability when the most important feature of GPPS and HIPS is melting and mobility is processed, and particularly injection molding is easy, is applicable to a large amount of production; Molding shrinkage is little of products formed dimensional stability.These characteristics has determined that HIPS resin is applicable to electronics, the field such as electric, for example, make housing of TV set etc.
HIPS is the same with most polymers, only has C, two kinds of elements of H in molecular structure, once contact and lighted with flame, still can burn after removing burning things which may cause a fire disaster, and thermal discharge is large, the amount of being fuming is large, and discharges toxic gas.Therefore, HIPS when requiring electronics, the electric product of fire safety, must be carried out to fire-retardant finish.This is that HIPS resin can only reach low-level horizontal firing (HB) because during according to U.S. UL94 Plays test material combustionproperty, and this rank material can slowly burn but can not certainly put out.To broad-spectrum HIPS resin in electronics, electrical industry, in the time of organism material as televisor, duplicating machine and other business machines etc., the U.S. and in the world a lot of national regulations must reach UL94V-0 flame retardant grade as the HIPS of housing of TV set, must reach UL94V-2 flame retardant grade as the HIPS of other a lot of audio-visual equipment.For improving the flame retardant resistance of HIPS, usually need to add the functional agents such as halogenated flame retardant.The synergistic system that the halogenated flame retardant that HIPS is conventional forms as Polybrominated biphenyl (PBBs), Poly Brominated Diphenyl Ethers (PBDEs) and weisspiessglanz, although can give oxygen index and the fire-retardant rank V-0 level of UL94 that HIPS plastics are very high, can meet the operating specification that much fire safety evaluating is required strict place, but when this system is subject to Gao Re and burning, not only raw cigarette amount is large, and produce poisonous and corrosive gases, environment is produced to harm simultaneously.As for the toxicity of fire retardant. be mainly 20th century dioxin (dioxin) problems that proposed of the mid-80, this is that this is undoubtedly people and should shows great attention to and problem demanding prompt solution because Polybrominated biphenyl, polybromodiphenyl ether and fire-retardant polymkeric substance thereof produce many bromos dibenzodioxin alkane (PBDD) and PBDF (PBDF) in the time of thermolysis and burning.Polybrominated biphenyl and Poly Brominated Diphenyl Ethers all belong to persistence organic pollutant (POPs), its residual periodicity in environment is long, difficult decomposes, not volatile, easily the shortcoming such as in biology and body fat, accumulate, human body and environment are produced and continue harm.In May, 2009, United Nations Environment Programme (UNEP) formally adds hexabromobiphenyl, tetrabromo Biphenyl Ether and pentabromo-Biphenyl Ether, hexabromobiphenyl ether and seven bromo biphenyl ethers etc. into " Convention of Stockholm ".In addition; European Union has formulated a series of Legal Paperss by legislation; be intended to limit use poisonous, harmful chemical; for example European Union has promulgated a compulsory standard " about being limited in the instruction that uses some objectionable constituent in electronic and electrical equipment " (Restriction of Hazardous Substances; be called for short RoHS instruction); this standard has started formal enforcement on July 1st, 2006; be mainly used in material and the technological standards of standard electronics, electric product, make it to be more conducive to HUMAN HEALTH and environment protection.The object of this standard is to eliminate the 6 class materials such as lead, mercury, cadmium, sexavalent chrome, Polybrominated biphenyl and the Poly Brominated Diphenyl Ethers in motor electronic product.RoHS instruction, for electric, the electronic product that may contain above-mentioned six kinds of objectionable impuritiess in all production processes and in starting material, mainly comprises refrigerator, washing machine, television set, IT product, digital product, communication products etc. and power tool, electronic electronic toy, medical electronic equipment etc.European Union has also completed and has passed through " registering, assess, authorize the rules of restriction about chemical " (being called for short REACH rules) Law Text on December 13rd, 2006, REACH rules came into force in 1 day June in 2007, and on June 1st, 2008 rises and enters enforcement.REACH rules are to registering, assess and permit and implement security monitoring with all chemical mandatory requirements that enter EU market on EU market, all including more than 500 ten thousand kinds of finished product such as the weaving in approximately 30,000 kinds of Chemicals and its downstream on EU market, light industry, pharmacy in registration, assessment, 3 management monitoring systems of license.That this laws and regulations requirement European Union oneself produces, for export and from all chemical industry of external import and downstream product thereof all must register and licensed, could circulate at EU market, the height concern material stipulating in REACH rules has at present reached hundred kinds more than.
For existing the deficiency of toxicity, people to attempt adopting inorganic combustion inhibitor as magnesium hydroxide and aluminium hydroxide etc. containing the HIPS of Polybrominated biphenyl, polybrominated diphenyl ether retardant.The inorganic combustion inhibitor such as magnesium hydroxide, aluminium hydroxide only has to be added in a large number and in HIPS system, just can have certain effect, but can bring shock strength and flowing property sharply to decline simultaneously, impacts to forming process and the use of HIPS plastics.Because bromide fire retardant flame retarding efficiency is high, consumption is few, little to the performance impact of flame-retarding HIPS, be still its main fire retardant kind, therefore choice and operation environment-friendly type bromide fire retardant is very important.Ya Bao company of the U.S. (Albemarle) has succeeded in developing a bromide fire retardant new variety TDE (DBDPE) for substituting decabromodiphynly oxide in early 1990s.The flame-retarding HIPS good flame retardation effect that contains TDE fire retardant, in combustion processes, can not produce the objectionable impuritiess such as many bromos dibenzodioxin alkane and PBDF, thereby meet the relevant regulations of European Union for bromide fire retardant completely, be the optimal substitute of bromide fire retardant decabromodiphenyl oxide (DBDPO) using at present.Although use TDE fire retardant to solve fire-retardant and toxicity problem in flame-retarding HIPS material, for making housing of TV set reach the fire-retardant rank of desired UL94V-0, the addition needing toward residence is larger, and it is all dispersed in polymeric matrix to cause it to be difficult to, result declines flame-retarding HIPS Material Physics-mechanical property, as the index such as shock strength, flexural strength and affect the visual appearance of housing of TV set.
In sum, if continue to use the synergistic flame retardant system of Polybrominated biphenyl, Poly Brominated Diphenyl Ethers and weisspiessglanz composition to make flame-retarding HIPS housing of TV set, will produce lasting harm to human body and environment, also not meet the R of European Union simultaneously othe requirement of HS instruction and REACH rules; Use good flame retardation effect and meet the R of European Union othe TDE fire retardant of HS instruction and REACH rules is made flame-retardant modified HIPS casing of liquid crystal television set and is also had the not good shortcoming of mechanical property and visual appearance; The technique of the flame-retardant modified HIPS casing of liquid crystal television set of existing making still needs to improve to meet the needs of market and environment protection.Therefore develop one not containing hazardous and noxious substances such as Polybrominated biphenyl, Poly Brominated Diphenyl Ethers and meet the R of European Union oenvironmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of HS instruction and REACH laws and regulations requirement and preparation method thereof becomes the active demand for the sector.
Summary of the invention
The object of the invention is to solve problems of the prior art with not enough, a kind of environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set is provided, this flame-retardant modified HIPS casing of liquid crystal television set is not containing hazardous and noxious substances such as Polybrominated biphenyl, Poly Brominated Diphenyl Ethers, meet RoHS Directive and REACH laws and regulations requirement, flame retardant resistance meets UL-94V-0 level.
The present invention simultaneously also provides the preparation method of this environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set, in flame-retardant modified HIPS material preparation process owing to having adopted the method for pigment pre-invasion, grinding and pigment and the previously prepared masterbatch of auxiliary agent, make flame-retardant modified HIPS casing of liquid crystal television set color and luster evenly, surface gloss improves, yield rate is improved and product performance are stable; While production environment improves, practitioner's physical and mental health is protected.
The present invention is achieved by the following technical solutions:
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, its raw material by following quality proportioning is made:
Figure BDA0000474577540000031
Figure BDA0000474577540000041
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, its further technical scheme is that described HIPS resin is to be a kind of of 4～8g/10min different varieties or its combination containing grafting polybutadiene rubber massfraction 6～8%, melt flow rate (MFR) MFR, and wherein melt flow rate (MFR) MFR test condition is 200 ℃ × 5kg.
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, its further technical scheme can also be that the described mobile speed MFR of GPPS resin melt is a kind of of 8～12g/10min different varieties or its combination, and wherein melt flow rate (MFR) MFR test condition is 200 ℃ × 5kg.
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, its further technical scheme can also be that described thermoplastic styrene butadiene rubber SBS is that hard section is that soft section of polystyrene PS mono-is that the hard section of polyhutadiene PB mono-is a kind of or its combination of the different varieties in polystyrene PS triblock copolymer, in SBS composition, phenylethylene/butadiene is that S/B mass ratio is 20/80～40/60, melt flow rate (MFR) MFR is 0.1～2.0g/10min, and wherein melt flow rate (MFR) MFR test condition is 200 ℃ × 5kg.
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, its further technical scheme can also be that described antimonous oxide is superfine high-purity antimonous oxide, mass percentage content 86 in antimonous oxide 2o 3>=99.9%, As 2o 3≤ 0.02%, PbO≤0.02%, median size≤1.0 μ m.
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, its further technical scheme can also be that described mineral oil is a kind of in high viscosity paraffin oil, high viscosity naphthenic oil or its combination, its 100 ℃ of kinematic viscosity are 9～15mm 2/ s.
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, its further technical scheme can also be that described lubricant is a kind of or its combination in Zinic stearas, ethylene bis stearic acid amide, polyethylene wax.
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, its further technical scheme can also be that described carbon black is a kind of or its combination of the different varieties of ortho states particle≤25nm of adopting wet processing or dry process to produce, tinctorial strength >=100%.
The preparation method of the above-mentioned environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, includes following steps:
Functional agent masterbatch preparation: 1. accurately weigh in proportion and put into container after charcoal blacks and mineral oil soak 40～48h under room temperature, make charcoal blacks pre-invasion; 2. be in 35～45 ℃ of three-roll grinders, to add the mixture of charcoal blacks and mineral oil to grind formation carbon black color paste 3～5 times in roller temperature, utilize the carbon black pellet size≤10 μ m in Hegman grind gage control mill base; 3. in high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed after the above high-speed condition of 1000rpm mixes 4～10min discharge to twin screw extruder; 4. adopt parallel double-screw extruder by the fervent mode granulation of air-cooled flour milling, pellet enters functional agent masterbatch feed bin after further separating by vibratory screening apparatus after 3 grades of cyclonic separators are cooling again; Wherein twin screw extruder granulating and forming control condition: 1 120 ± 10 ℃ of district's temperature, 2 135 ± 10 ℃ of district's temperature, 3 150 ± 10 ℃ of district's temperature, 4 160 ± 10 ℃ of district's temperature, 5 150 ± 10 ℃ of district's temperature, 135 ± 5 ℃ of head temperatures;
The preparation of flame-retardant modified HIPS pellet: 1. take on request HIPS, GPPS and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder, 2. by the HIPS mixing, GPPS and functional agent masterbatch add twin screw extruder, material makes resin and auxiliary agent blending dispersion in formula even through the strong shearing action of twin screw extruder, melt is extruded and is divided into several from cross-head, cooling by tank, forced air drying, finally obtain flame-retardant modified HIPS pellet by dicing machine, wherein twin screw extruder granulating and forming control condition: 1 180 ± 10 ℃ of district's temperature, 2 185 ± 10 ℃ of district's temperature, 3 190 ± 10 ℃ of district's temperature, 4 190 ± 10 ℃ of district's temperature, 5 195 ± 10 ℃ of district's temperature, 6 195 ± 10 ℃ of district's temperature, 7 195 ± 10 ℃ of district's temperature, 8 195 ± 10 ℃ of district's temperature, 9 190 ± 10 ℃ of district's temperature, 190 ± 10 ℃ of head temperatures,
Flame-retardant modified HIPS casing of liquid crystal television set injection molding: 1. raw material drying technique: 70 ± 5 ℃ of time 3 ± 1h of temperature; 2. injecting forming temperature: 1 230 ± 10 ℃ of district's temperature, 2 230 ± 10 ℃ of district's temperature, 3 220 ± 10 ℃ of district's temperature, 4 210 ± 10 ℃ of district's temperature, 5 200 ± 10 ℃ of district's temperature, 6 190 ± 10 ℃ of district's temperature, 180 ± 10 ℃ of nozzle temperatures, hot runner temperature is 230 ± 10 ℃, die temperature 50 ± 5C; 3. injection pressure: 130 ± 10MPa; 4. injection molding cycle: 90 ± 5s.
Beneficial effect of the present invention is mainly reflected in the following aspects:
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention, mainly take HIPS resin, GPPS resin and thermoplastic styrene butadiene rubber as body material, has good tensile strength, flexural strength, modulus in flexure, shock strength and heat-drawn wire.This be because in the time using HIPS resin for fire retardant material owing to causing its impact strength decreased adding of more fire retardant, although by adding thermoplastic styrene butadiene rubber to improve the shock strength of flame-retarding HIPS material, also can cause adding of thermoplastic styrene butadiene rubber flexural strength, modulus in flexure and the heat-drawn wire of flame-retarding HIPS material to decline simultaneously.GPPS resin resin add further flexural strength, modulus in flexure and the heat-drawn wire of balance HIPS fire retardant material, make the environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set over-all properties prepared take HIPS resin, GPPS resin and thermoplastic styrene butadiene rubber as body material better.
Adopting TDE and superfine high-purity antimonous oxide is fire retardant, especially passes through the selected superfine high-purity antimonous oxide of great many of experiments, and its key technical indexes is mass percentage content 86 2o 3>=99.9%, As 2o 3≤ 0.02%, PbO≤0.02%, median size≤1.0 μ m.Compare with common antimonous oxide fire retardant, flame-retardant modified HIPS casing of liquid crystal television set prepared by employing superfine high-purity antimonous oxide fire retardant is in the requirement while that meets RoHS Directive and REACH rules, and outward appearance homogeneity and the aesthetic property of product also get a promotion.Flame-retardant modified HIPS material is also owing to causing mobility variation adding of fire retardant, and especially superfine high-purity antimonous oxide particle diameter is little, specific surface area is large, further worsens the moulding processability of large scale liquid crystal TV shell.In environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set material composition of the present invention, by adding full-bodied mineral oil, (high viscosity paraffin oil and high viscosity naphthenic oil, its 100 ℃ of kinematic viscosity are 9～15mm 2/ s), improve the flowability properties of material, make the quality melt flow rate (MFR) (200 ℃ × 5kg of test condition) of material be controlled at 8～12g/10min, meet the forming process demand of large scale liquid crystal TV shell; Overcome (240 ℃) organic volatile when adding low viscous mineral oil to cause the moulding of casing of liquid crystal television set high temperature injection simultaneously and affected product appearance.In addition, the adding of fine grain size, high tinctorial strength carbon black, can reduce the consumption of tinting material and improve the color and luster of casing of liquid crystal television set.
In flame-retardant modified HIPS material composition, contain a large amount of powdery combustion inhibitors and color black, traditional preparation technology adds in twin screw extruder, carry out granulation rear directly adding after usually first HIPS resin being mixed by high-speed mixer with the auxiliary agent such as fire retardant, carbon black.Its shortcoming is that powder raw material easily flies upward pollution production environment, and it is unfavorable that production environment and practitioner's physical and mental health is caused; In addition, because directly adding the stubborn carbon black aggregation structure of granulation in twin screw extruder in the lump, carbon black and other raw and auxiliary materials affect coloring effect and the dispersion effect of carbon black.Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set material of the present invention is first charcoal blacks and mineral oil to be soaked and makes charcoal blacks pre-invasion under room temperature, be ground to carbon black pellet size≤10 μ m by three-roll grinder again and make carbon black color paste, solve the pollution of carbon black to production environment, and improved the dispersion effect of carbon black.Further utilize carbon black color paste mineral oil in fluid adhesive attraction, in high-speed mixer, make the auxiliary agent such as thermoplastic styrene butadiene rubber, fire retardant and carbon black color paste mix, solved the problem of fire retardant dust pollution production environment.Said mixture is passed through to twin screw extruder preparation functional agent masterbatch, make multiple auxiliary agent first mix and be uniformly dispersed, solve traditional technology and prepared flame-retardant modified HIPS material and have powdery auxiliary agent inhomogeneous difficult problem of blanking in forcing machine hopper, made that the homogeneity that the later stage is prepared flame-retardant modified HIPS material improves, stable performance property improvement.
Environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set of the present invention does not use poisonous, the harmful auxiliary agent such as Polybrominated biphenyl, Poly Brominated Diphenyl Ethers, phthalic ester plasticizer, meets the RoHS instruction of European Union and the requirement of REACH rules.Owing to adopting the method for thermoplastic styrene butadiene rubber, fire retardant, high viscosity mineral oil, lubricant and the previously prepared functional master batch of master grind carbon black, solve the problem because of production process dust polluting environment, and improved production stability and the yield rate of product.Raw material of the present invention is easy to get, cheap, preparation method is simple simultaneously.
Specific implementation method
By specific embodiment, the present invention is described below, but the present invention is not merely defined in these embodiment.
Embodiment 1
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 6%, MFR=6.8g/10min) 62.8, GPPS resin (MFR=9.6g/10min) 10.2, thermoplastic styrene butadiene rubber (mass ratio S/B=30/70, MFR=0.5g/10min) 5.5, TDE 12.5, superfine high-purity antimonous oxide 4.2, naphthenic oil (100 ℃ of kinematic viscosity=10.5mm 2/ s) 4, oxidation inhibitor B2150.4, Zinic stearas 0.3, ethylene bis stearic acid amide 0.2, carbon black (tinctorial strength 105%) 1.5.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 42h under room temperature after be to grind in 35 ℃ of three-roll grinders that to make particle diameter for 4 times be 2.5～10 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 5min.Twin screw extruder granulating and forming control condition: 1 120 ℃ of district's temperature, 2 135 ℃ of district's temperature, 3 150 ℃ of district's temperature, 4 160 ℃ of district's temperature, 5 150 ℃ of district's temperature, 135 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 185 ℃ of district's temperature; 2 190 ℃ of district's temperature, 3 195 ℃ of district's temperature, 4 195 ℃ of district's temperature; 5 200 ℃ of district's temperature; 6 200 ℃ of district's temperature, 7 200 ℃ of district's temperature, 8 195 ℃ of district's temperature; 9 195 ℃ of district's temperature, 195 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: 75 ℃ of time 2h of temperature; Injecting forming temperature: 1 230 ℃ of district's temperature, 2 230 ℃ of district's temperature, 3 220 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 200 ℃ of district's temperature, 6 190 ℃ of district's temperature, 180 ℃ of nozzle temperatures, hot runner temperature is 240 ℃, 55 ℃ of die temperatures; Injection pressure: 135MPa; The injection molding cycle: 90s.
Embodiment 2
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 8%, MFR=4.8g/10min) 40, GPPS resin (MFR=11.2g/10min) 30, thermoplastic styrene butadiene rubber (mass ratio S/B=20/80, MFR=2.0g/10min) 8, TDE 12, superfine high-purity antimonous oxide 6, naphthenic oil (100 ℃ of kinematic viscosity=9mm 2/ s) 3, oxidation inhibitor B2150.3, Zinic stearas 1.0, carbon black (tinctorial strength 118%) 1.2.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 40h under room temperature after be to grind in 35 ℃ of three-roll grinders that to make particle diameter for 4 times be 2.5～10 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 8min.Twin screw extruder granulating and forming control condition: 1 125 ℃ of district's temperature, 2 135 ℃ of district's temperature, 3 150 ℃ of district's temperature, 4 160 ℃ of district's temperature, 5 150 ℃ of district's temperature, 130 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 190 ℃ of district's temperature; 2 195 ℃ of district's temperature, 3 200 ℃ of district's temperature, 4 200 ℃ of district's temperature; 5 205 ℃ of district's temperature; 6 205 ℃ of district's temperature, 7 200 ℃ of district's temperature, 8 200 ℃ of district's temperature; 9 195 ℃ of district's temperature, 190 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: 65 ℃ of time 4h of temperature; Injecting forming temperature: 1 240 ℃ of district's temperature, 2 230 ℃ of district's temperature, 3 220 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 200 ℃ of district's temperature, 6 190 ℃ of district's temperature, 190 ℃ of nozzle temperatures, hot runner temperature is 225 ℃, 55 ℃ of die temperatures; Injection pressure: 130MPa; The injection molding cycle: 92s.
Embodiment 3
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 6%, MFR=6.8g/10min) 52, HIPS resin (rubber quality mark 8%, MFR=4.8g/10min) 11, GPPS resin (MFR=9.6g/10min) 10, thermoplastic styrene butadiene rubber (mass ratio S/B=30/70, MFR=1.0g/10min) 5, TDE 16, superfine high-purity antimonous oxide 4, naphthenic oil (100 ℃ of kinematic viscosity=15mm 2/ s) 5, oxidation inhibitor B2150.2, polyethylene wax 0.3, ethylene bis stearic acid amide 0.3, carbon black (tinctorial strength 121%) 0.9.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 45h under room temperature after be to grind in 45 ℃ of three-roll grinders that to make particle diameter for 3 times be 5～10 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 4min.Twin screw extruder granulating and forming control condition: 1 125 ℃ of district's temperature, 2 140 ℃ of district's temperature, 3 155 ℃ of district's temperature, 4 165 ℃ of district's temperature, 5 155 ℃ of district's temperature, 140 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 180 ℃ of district's temperature; 2 185 ℃ of district's temperature, 3 190 ℃ of district's temperature, 4 190 ℃ of district's temperature; 5 195 ℃ of district's temperature; 6 195 ℃ of district's temperature, 7 195 ℃ of district's temperature, 8 195 ℃ of district's temperature; 9 190 ℃ of district's temperature, 190 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: 65 ℃ of time 3.5h of temperature; Injecting forming temperature: 1 230 ℃ of district's temperature, 2 220 ℃ of district's temperature, 3 220 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 district temperature 210C, 6 200 ℃ of district's temperature, 190 ℃ of nozzle temperatures, hot runner temperature is 230 ℃, 50 ℃ of die temperatures; Injection pressure: 135MPa; The injection molding cycle: 92s.
Embodiment 4
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 7%, MFR=8g/10min) 64, GPPS resin (MFR=9.6g/10min) 4, GPPS resin (MFR=11.2g/10min) 4, thermoplastic styrene butadiene rubber (mass ratio S/B=30/70, MFR=0.5g/10min) 6, TDE 10, superfine high-purity antimonous oxide 5, paraffin oil (100 ℃ of kinematic viscosity=12mm 2/ s) 6, oxidation inhibitor B2150.3, Zinic stearas 0.4, polyethylene wax 0.2, ethylene bis stearic acid amide 0.3, carbon black (tinctorial strength 105%) 0.8, carbon black (tinctorial strength 121%) 0.4.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 46h under room temperature after be to grind in 40 ℃ of three-roll grinders that to make particle diameter for 3 times be 5～10 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 6min.Twin screw extruder granulating and forming control condition: 1 110 ℃ of district's temperature, 2 130 ℃ of district's temperature, 3 145 ℃ of district's temperature, 4 150 ℃ of district's temperature, 5 140 ℃ of district's temperature, 130 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 175 ℃ of district's temperature; 2 180 ℃ of district's temperature, 3 185 ℃ of district's temperature, 4 190 ℃ of district's temperature; 5 190 ℃ of district's temperature; 6 195 ℃ of district's temperature, 7 190 ℃ of district's temperature, 8 185 ℃ of district's temperature; 9 185 ℃ of district's temperature, 180 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: 75 ℃ of time 2h of temperature; Injecting forming temperature: 1 230 ℃ of district's temperature, 2 220 ℃ of district's temperature, 3 210 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 200 ℃ of district's temperature, 6 190 ℃ of district's temperature, 180 ℃ of nozzle temperatures, hot runner temperature is 235 ℃, 45 ℃ of die temperatures; Injection pressure: 140MPa; The injection molding cycle: 85s.
Embodiment 5
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 8%, MFR=4.8g/10min) 70, GPPS resin (MFR=8.0g/10min) 5, thermoplastic styrene butadiene rubber (mass ratio S/B=40/60, MFR=0.1g/10min) 5, TDE 11.5, superfine high-purity antimonous oxide 5, paraffin oil (100 ℃ of kinematic viscosity=10mm 2/ s) 4.5, oxidation inhibitor B2150.5, polyethylene wax 0.3, ethylene bis stearic acid amide 0.5, carbon black (tinctorial strength 121%) 1.2.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 48h under room temperature after be to grind in 40 ℃ of three-roll grinders that to make particle diameter for 3 times be 5～7.5 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 10min.Twin screw extruder granulating and forming control condition: 1 125 ℃ of district's temperature, 2 135 ℃ of district's temperature, 3 150 ℃ of district's temperature, 4 150 ℃ of district's temperature, 5 140 ℃ of district's temperature, 135 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 180 ℃ of district's temperature; 2 185 ℃ of district's temperature, 3 190 ℃ of district's temperature, 4 195 ℃ of district's temperature; 5 200 ℃ of district's temperature; 6 195 ℃ of district's temperature, 7 195 ℃ of district's temperature, 8 190 ℃ of district's temperature; 9 190 ℃ of district's temperature, 190 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: temperature 70 C time 3h; Injecting forming temperature: 1 220 ℃ of district's temperature, 2 220 ℃ of district's temperature, 3 210 ± 10 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 200 ℃ of district's temperature, 6 190 ℃ of district's temperature, 180 ℃ of nozzle temperatures, hot runner temperature is 235 ℃, 50 ℃ of die temperatures; Injection pressure: 130MPa; The injection molding cycle: 95s.
Embodiment 6
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 6%, MFR=6.8g/10min) 60, GPPS resin (MFR=11.2g/10min) 10, thermoplastic styrene butadiene rubber (mass ratio S/B=40/60, MFR=2.0g/10min) 5, thermoplastic styrene butadiene rubber (mass ratio S/B=40/60, MFR=0.1g/10min) 5, TDE 12, superfine high-purity antimonous oxide 4, naphthenic oil (100 ℃ of kinematic viscosity=9mm 2/ s) 6, oxidation inhibitor B2150.3, Zinic stearas 0.2, polyethylene wax 0.2, ethylene bis stearic acid amide 0.3, carbon black (tinctorial strength 105%) 1.5.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 45h under room temperature after be to grind in 45 ℃ of three-roll grinders that to make particle diameter for 5 times be 2.5～5 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 10min.Twin screw extruder granulating and forming control condition: 1 110 ℃ of district's temperature, 2 130 ℃ of district's temperature, 3 150 ℃ of district's temperature, 4 160 ℃ of district's temperature, 5 150 ℃ of district's temperature, 130 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 180 ℃ of district's temperature; 2 185 ℃ of district's temperature, 3 190 ℃ of district's temperature, 4 195 ℃ of district's temperature; 5 195 ℃ of district's temperature; 6 195 ℃ of district's temperature, 7 190 ℃ of district's temperature, 8 190 ℃ of district's temperature; 9 185 ℃ of district's temperature, 185 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: temperature 70 C time 3.5h; Injecting forming temperature: 1 235 ℃ of district's temperature, 2 230 ℃ of district's temperature, 3 225 ℃ of district's temperature, 4 220 ℃ of district's temperature, 5 210 ℃ of district's temperature, 6 200 ℃ of district's temperature, 190 ℃ of nozzle temperatures, hot runner temperature is 240 ℃, 45 ℃ of die temperatures; Injection pressure: 130MPa; The injection molding cycle: 88s.
Embodiment 7
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 6%, MFR=6.8g/10min) 65, GPPS resin (MFR=8.0g/10min) 10, thermoplastic styrene butadiene rubber (mass ratio S/B=30/70, MFR=1.0g/10min) 3, thermoplastic styrene butadiene rubber (mass ratio S/B=40/60, MFR=2.0g/10min) 3, TDE 12.5, superfine high-purity antimonous oxide 4, naphthenic oil (100 ℃ of kinematic viscosity=15mm 2/ s) 5, oxidation inhibitor B2150.4, polyethylene wax 0.4, ethylene bis stearic acid amide 0.4, carbon black (tinctorial strength 121%) 1.1.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 48h under room temperature after be to grind in 40 ℃ of three-roll grinders that to make particle diameter for 3 times be 2.5～10 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 6min.Twin screw extruder granulating and forming control condition: 1 130 ℃ of district's temperature, 2 140 ℃ of district's temperature, 3 150 ℃ of district's temperature, 4 160 ℃ of district's temperature, 5 145 ℃ of district's temperature, 135 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 175 ℃ of district's temperature; 2 185 ± 10 ℃ of district's temperature; 3 190 ℃ of district's temperature, 4 195 ℃ of district's temperature, 5 200 ℃ of district's temperature; 6 205 ℃ of district's temperature; 7 200 ℃ of district's temperature, 8 190 ℃ of 195 ℃ 9 of district's temperature district's temperature, 190 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: 75 ℃ of time 3h of temperature; Injecting forming temperature: 1 230 ℃ of district's temperature, 2 225 ℃ of district's temperature, 3 220 ℃ of district's temperature, 4 215 ℃ of district's temperature, 5 210 ℃ of district's temperature, 6 195 ℃ of district's temperature, 185 ℃ of nozzle temperatures, hot runner temperature is 220 ℃, 55 ℃ of die temperatures; Injection pressure: 135MPa; The injection molding cycle: 85s.
Embodiment 8
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 7%, MFR=8g/10min) 50, GPPS resin (MFR=9.6g/10min) 10, GPPS resin (MFR=8.0g/10min) 10, thermoplastic styrene butadiene rubber (mass ratio S/B=40/60, MFR=0.1g/10min) 9, TDE 13, superfine high-purity antimonous oxide 3.5, paraffin oil (100 ℃ of kinematic viscosity=10mm 2/ s) 2, naphthenic oil (100 ℃ of kinematic viscosity=15mm 2/ s) 3, oxidation inhibitor B2150.5, Zinic stearas 0.3, polyethylene wax 0.3, ethylene bis stearic acid amide 0.2, carbon black (tinctorial strength 118%) 1.3.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 46h under room temperature after be to grind in 45 ℃ of three-roll grinders that to make particle diameter for 4 times be 2.5～7.5 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 8min.Twin screw extruder granulating and forming control condition: 1 120 ℃ of district's temperature, 2 135 ℃ of district's temperature, 3 155 ℃ of district's temperature, 4 165 ℃ of district's temperature, 5 150 ℃ of district's temperature, 135 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 180 ℃ of district's temperature; 2 190 ℃ of district's temperature, 3 190 ℃ of district's temperature, 4 195 ℃ of district's temperature; 5 195 ℃ of district's temperature; 6 200 ℃ of district's temperature, 7 195 ℃ of district's temperature, 8 195 ℃ of district's temperature; 9 190 ℃ of district's temperature, 190 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: 65 ℃ of time 4h of temperature; Injecting forming temperature: 1 240 ℃ of district's temperature, 2 230 ℃ of district's temperature, 3 220 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 200 ℃ of district's temperature, 6 190 ℃ of district's temperature, 180 ℃ of nozzle temperatures, hot runner temperature is 230 ℃, 55 ℃ of die temperatures; Injection pressure: 140MPa; The injection molding cycle: 92s.
Embodiment 9
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 6%, MFR=6.8g/10min) 45, HIPS resin (rubber quality mark 8%, MFR=4.8g/10min) 10, GPPS resin (MFR=11.2g/10min) 5, GPPS resin (MFR=8.0g/10min) 10, thermoplastic styrene butadiene rubber (mass ratio S/B=40/60, MFR=0.1g/10min) 3, thermoplastic styrene butadiene rubber (mass ratio S/B=40/60, MFR=2.0g/10min) 5, TDE 11.5, superfine high-purity antimonous oxide 4.5, naphthenic oil (100 ℃ of kinematic viscosity=15mm 2/ s) 5.5, oxidation inhibitor B2150.3, Zinic stearas 0.5, polyethylene wax 0.3, carbon black (tinctorial strength 105%) 1.4.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 44h under room temperature after be to grind in 35 ℃ of three-roll grinders that to make particle diameter for 5 times be 2.5～5 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 6min.Twin screw extruder granulating and forming control condition: 1 120 ℃ of district's temperature, 2 130 ℃ of district's temperature, 3 145 ℃ of district's temperature, 4 160 ℃ of district's temperature, 5 150 ℃ of district's temperature, 140 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 170 ℃ of district's temperature; 2 180 ℃ of district's temperature, 3 185 ℃ of district's temperature, 4 190 ℃ of district's temperature; 5 190 ℃ of district's temperature; 6 195 ℃ of district's temperature, 7 195 ℃ of district's temperature, 8 190 ℃ of district's temperature; 9 185 ℃ of district's temperature, 185 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: temperature 70 C time 4h; Injecting forming temperature: 1 230 ℃ of district's temperature, 2 230 ℃ of district's temperature, 3 220 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 200 ℃ of district's temperature, 6 190 ℃ of district's temperature, 190 ℃ of nozzle temperatures, hot runner temperature is 230 ℃, 50 ℃ of die temperatures; Injection pressure: 135MPa; The injection molding cycle: 95s.
Embodiment 10
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 8%, MFR=4.8g/10min) 28, HIPS resin (rubber quality mark 7%, MFR=8g/10min) 30, GPPS resin (MFR=9.6g/10min) 5, GPPS resin (MFR=11.2g/10min) 5, thermoplastic styrene butadiene rubber (mass ratio S/B=30/70, MFR=0.5g/10min) 5, thermoplastic styrene butadiene rubber (mass ratio S/B=30/70, MFR=1.0g/10min) 3, TDE 13, superfine high-purity antimonous oxide 5, paraffin oil (100 ℃ of kinematic viscosity=12mm 2/ s) 4, naphthenic oil (100 ℃ of kinematic viscosity=9mm 2/ s) 3, oxidation inhibitor B2150.5, Zinic stearas 0.3, polyethylene wax 0.3, ethylene bis stearic acid amide 0.4, carbon black (tinctorial strength 118%) 0.8, carbon black (tinctorial strength 121%) 0.5.
Preparation method:
1. functional agent masterbatch preparation: charcoal blacks and mineral oil are added in roller temperature soak 45h under room temperature after be to grind in 45 ℃ of three-roll grinders that to make particle diameter for 5 times be 2.5～7.5 μ m carbon black color pastes.In high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed extremely twin screw extruder of the fervent mode granulation of air-cooled flour milling of discharge after the above high-speed condition mixing of 1000rpm 5min.Twin screw extruder granulating and forming control condition: 1 125 ℃ of district's temperature, 2 135 ℃ of district's temperature, 3 150 ℃ of district's temperature, 4 160 ℃ of district's temperature, 5 145 ℃ of district's temperature, 130 ℃ of head temperatures; Pellet after twin screw extruder granulation enters functional agent masterbatch feed bin through 3 grades of cyclonic separators are cooling after further separating with by vibratory screening apparatus.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: HIPS resin, GPPS resin and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder; Granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 180 ℃ of district's temperature; 2 185 ± 10 ℃ of district's temperature, 3 190 ± 10 ℃ of district's temperature, 4 195 ℃ of district's temperature; 5 200 ℃ of district's temperature; 6 205 ℃ of district's temperature, 7 200 ℃ of district's temperature, 8 200 ℃ of district's temperature; 9 195 ± 10 ℃ of district's temperature, 195 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: 75 ℃ of time 2.5h of temperature; Injecting forming temperature: 1 235 ℃ of district's temperature, 2 230 ℃ of district's temperature, 3 225 ℃ of district's temperature, 4 215 ℃ of district's temperature, 5 205 ℃ of district's temperature, 6 190 ℃ of district's temperature, 185 ℃ of nozzle temperatures, hot runner temperature is 235 ℃, 50 ℃ of die temperatures; Injection pressure: 130MPa; The injection molding cycle: 90s.
Comparative example 1
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 7%, MFR=8g/10min) 100, oxidation inhibitor B2150.3, Zinic stearas 0.5, ordinary carbon black 1.0.
Preparation method:
1. the high-speed mixing of raw material: add HIPS resin, oxidation inhibitor B215, Zinic stearas and ordinary carbon black in high-speed mixer, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed at the above high-speed condition mixing of 1000rpm 5min discharge to the hopper of twin screw extruder.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 180 ℃ of district's temperature; 2 185 ℃ of district's temperature, 3 190 ℃ of district's temperature, 4 190 ℃ of district's temperature; 5 195 ℃ of district's temperature; 6 195 ℃ of district's temperature, 7 195 ℃ of district's temperature, 8 195 ℃ of district's temperature; 9 190 ℃ of district's temperature, 190 ℃ of head temperatures.
3. modification HIPS casing of liquid crystal television set injection molding: raw material drying technique: temperature 70 C time 3h; Injecting forming temperature: 1 230 ℃ of district's temperature, 2 230 ℃ of district's temperature, 3 220 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 200 ℃ of district's temperature, 6 190 ℃ of district's temperature, 180 ℃ of nozzle temperatures, hot runner temperature is 225 ℃, 45 ℃ of die temperatures; Injection pressure: 130MPa; The injection molding cycle: 93s.
Comparative example 2
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 7%, MFR=8g/10min) 70, GPPS resin (MFR=9.6g/10min) 30, oxidation inhibitor B2150.3, Zinic stearas 0.5, ordinary carbon black 1.0.
Preparation method:
1. the high-speed mixing of raw material: add HIPS resin, GPPS resin, oxidation inhibitor B215, Zinic stearas and ordinary carbon black in high-speed mixer, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed at the above high-speed condition mixing of 1000rpm 6min discharge to the hopper of twin screw extruder.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 180 ℃ of district's temperature; 2 185 ℃ of district's temperature, 3 190 ℃ of district's temperature, 4 195 ℃ of district's temperature; 5 195 ℃ of district's temperature; 6 200 ℃ of district's temperature, 7 195 ℃ of district's temperature, 8 195 ℃ of district's temperature; 9 190 ℃ of district's temperature, 190 ℃ of head temperatures.
3. modification HIPS casing of liquid crystal television set injection molding: raw material drying technique: 65 ℃ of time 4h of temperature; Injecting forming temperature: 1 230 ℃ of district's temperature, 2 220 ℃ of district's temperature, 3 220 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 200 ℃ of district's temperature, 6 190 ℃ of district's temperature, 190 ℃ of nozzle temperatures, hot runner temperature is 235 ℃, 50 ℃ of die temperatures; Injection pressure: 130MPa; The injection molding cycle: 88s.
Comparative example 3
Raw material mass mixture ratio is: HIPS resin (rubber quality mark 6%, MFR=6.8g/10min) 85, TDE 12.5, common antimonous oxide 4, oxidation inhibitor B2150.3, Zinic stearas 0.4, ethylene bis stearic acid amide 0.4, ordinary carbon black 1.5.
Preparation method:
1. the high-speed mixing of raw material: add HIPS resin, TDE, common antimonous oxide, oxidation inhibitor B215, Zinic stearas, ethylene bis stearic acid amide and ordinary carbon black in high-speed mixer, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed at the above high-speed condition mixing of 1000rpm 8min discharge to the hopper of twin screw extruder.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 180 ℃ of district's temperature; 2 185 ℃ of district's temperature, 3 190 ℃ of district's temperature, 4 190 ℃ of district's temperature; 5 195 ℃ of district's temperature; 6 195 ℃ of district's temperature, 7 195 ℃ of district's temperature, 8 195 ℃ of district's temperature; 9 190 ℃ of district's temperature, 190 ℃ of head temperatures.
3. flame-retardant modified HIPS casing of liquid crystal television set injection molding: raw material drying technique: temperature 70 C time 3.5h: injecting forming temperature: 1 220 ℃ of district's temperature, 2 220 ℃ of district's temperature, 3 210 ℃ of district's temperature, 4 210 ℃ of district's temperature, 5 200 ℃ of district's temperature, 6 190 ℃ of district's temperature, 180 ℃ of nozzle temperatures, hot runner temperature is 230 ℃, 55 ℃ of die temperatures; Injection pressure: 130MPa; The injection molding cycle: 90 s.
Comparative example 4
Raw material mass mixture ratio is: GPPS resin (MFR=9.6g/10min) 75, thermoplastic styrene butadiene rubber (mass ratio S/B=30/70, MFR=5g/10min) 6, low viscosity paraffin oil (40 ℃ of kinematic viscosity=9.7mm 2/ s) 6, TDE 12.5, common antimonous oxide 4, oxidation inhibitor B2150.3, Zinic stearas 0.4, ethylene bis stearic acid amide 0.4, ordinary carbon black 1.5.
Preparation method:
1. the high-speed mixing of raw material: add GPPS resin, thermoplastic styrene butadiene rubber, low viscosity paraffin oil, TDE, common antimonous oxide, oxidation inhibitor, Zinic stearas, ethylene bis stearic acid amide and ordinary carbon black in high-speed mixer, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed at the above high-speed condition mixing of 1000rpm 8min discharge to the hopper of twin screw extruder.
2. twin screw extruder is prepared flame-retardant modified HIPS pellet: granulation adopts the mode of cooling, the forced air drying of tank and dicing machine pelletizing to carry out; twin screw extruder moulding control condition: 1 190 ℃ of district's temperature; 2 195 ℃ of district's temperature, 3 200 ℃ of district's temperature, 4 200 ℃ of district's temperature; 5 205 ℃ of district's temperature; 6 205 ℃ of district's temperature, 7 205 ℃ of district's temperature, 8 205 ℃ of district's temperature; 9 200 ℃ of district's temperature, 195 ℃ of head temperatures.
3. flame-retardant modified GPPS casing of liquid crystal television set injection molding: raw material drying technique: 75 ℃ of time 2h of temperature; Injecting forming temperature: 1 230 ℃ of district's temperature, 2 230 ℃ of district's temperature, 3 220 ℃ of district's temperature, 4 215 ℃ of district's temperature, 5 210 ℃ of district's temperature, 6 195 ℃ of district's temperature, 190 ℃ of nozzle temperatures, hot runner temperature is 230 ℃, 50 ℃ of die temperatures; Injection pressure: 130MPa; The injection molding cycle: 90s.
Table 1 environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set performance test and forming process feature
Figure BDA0000474577540000171
* under maximum stress in bend P=1.80MPa condition, test, temperature rise rate is 120 ℃/h; * tests under maximum stress in bend P=0.45MPa condition, and temperature rise rate is 120 ℃/h; 200 ℃ of * * probe temperatures, load 5kg.

Claims (9)

1. an environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set, is characterized in that being made up of the raw material of following quality proportioning:
Figure FDA0000474577530000011
2. environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set according to claim 1, is characterized in that described HIPS resin is is a kind of or its combination of 4～8g/10min different varieties containing grafting polybutadiene rubber massfraction 6～8%, melt flow rate (MFR) MFR.
3. environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set according to claim 1, is characterized in that the mobile speed MFR of described GPPS resin melt is a kind of or its combination of 8～12g/10min different varieties.
4. environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set according to claim 1, it is characterized in that described thermoplastic styrene butadiene rubber SBS is that hard section is that soft section of polystyrene PS mono-is that the hard section of polyhutadiene PB mono-is a kind of or its combination of the different varieties in polystyrene PS triblock copolymer, in SBS composition, phenylethylene/butadiene is that S/B mass ratio is
20/80～40/60, melt flow rate (MFR) MFR is 0.1～2.0g/10min.
5. environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set according to claim 1, is characterized in that described antimonous oxide is superfine high-purity antimonous oxide, mass percentage content 56 in antimonous oxide 2o 3>=99.9%, As 2o 3≤ 0.02%, PbO≤0.02%, median size≤1.0 μ m.
6. environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set according to claim 1, is characterized in that described mineral oil is a kind of in high viscosity paraffin oil, high viscosity naphthenic oil or its combination, and its 100 ℃ of kinematic viscosity are 9～15mm 2/ s.
7. environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set according to claim 1, is characterized in that described lubricant is a kind of or its combination in Zinic stearas, ethylene bis stearic acid amide, polyethylene wax.
8. environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set according to claim 1, is characterized in that described carbon black is a kind of or its combination of the different varieties of ortho states particle≤25nm of adopting wet processing or dry process to produce, tinctorial strength >=100%.
9. the preparation method of the environmentally friendly flame-retardant modified HIPS casing of liquid crystal television set as described in as arbitrary in claim 1～8, is characterized in that including following steps:
Functional agent masterbatch preparation: 1. accurately weigh in proportion and put into container after charcoal blacks and mineral oil soak 40～48h under room temperature, make charcoal blacks pre-invasion; 2. be in 35～45 ℃ of three-roll grinders, to add the mixture of charcoal blacks and mineral oil to grind formation carbon black color paste 3～5 times in roller temperature, utilize the carbon black pellet size≤10 μ m in Hegman grind gage control mill base; 3. in high-speed mixer, add thermoplastic styrene butadiene rubber, TDE, superfine high-purity antimonous oxide, oxidation inhibitor B215, lubricant and carbon black color paste, start in high-speed mixer and stir 2min under the low-speed conditions below rotating speed 500rpm, then start rotating speed after the above high-speed condition of 1000rpm mixes 4～10min discharge to twin screw extruder; 4. adopt parallel double-screw extruder by the fervent mode granulation of air-cooled flour milling, pellet enters functional agent masterbatch feed bin after further separating by vibratory screening apparatus after 3 grades of cyclonic separators are cooling again; Wherein twin screw extruder granulating and forming control condition: 1 120 ± 10 ℃ of district's temperature, 2 135 ± 10 ℃ of district's temperature, 3 150 ± 10 ℃ of district's temperature, 4 160 ± 10 ℃ of district's temperature, 5 150 ± 10 ℃ of district's temperature, 135 ± 5 ℃ of head temperatures;
The preparation of flame-retardant modified HIPS pellet: 1. take on request HIPS, GPPS and functional agent masterbatch add in horizontal plastic mixing machine, mix 3～6min after discharge to twin screw extruder, 2. by the HIPS mixing, GPPS and functional agent masterbatch add twin screw extruder, material makes resin and auxiliary agent blending dispersion in formula even through the strong shearing action of twin screw extruder, melt is extruded and is divided into several from cross-head, cooling by tank, forced air drying, finally obtain flame-retardant modified HIPS pellet by dicing machine, wherein twin screw extruder granulating and forming control condition: 1 180 ± 10 ℃ of district's temperature, 2 185 ± 10 ℃ of district's temperature, 3 190 ± 10 ℃ of district's temperature, 4 190 ± 10 ℃ of district's temperature, 5 195 ± 10 ℃ of district's temperature, 6 195 ± 10 ℃ of district's temperature, 7 195 ± 10 ℃ of district's temperature, 8 195 ± 10 ℃ of district's temperature, 9 190 ± 10 ℃ of district's temperature, 190 ± 10 ℃ of head temperatures,
Flame-retardant modified HIPS casing of liquid crystal television set injection molding: 1. raw material drying technique: 70 ± 5 ℃ of time 3 ± 1h of temperature; 2. injecting forming temperature: 1 230 ± 10 ℃ of district's temperature, 2 230 ± 10 ℃ of district's temperature, 3 220 ± 10 ℃ of district's temperature, 4 210 ± 10 ℃ of district's temperature, 5 200 ± 10 ℃ of district's temperature, 6 190 ± 10 ℃ of district's temperature, 180 ± 10 ℃ of nozzle temperatures, hot runner temperature is 230 ± 10 ℃, 50 ± 5 ℃ of die temperatures; 3. injection pressure: 130 ± 10MPa; 4. injection molding cycle: 90 ± 5s.
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