Composition of polycarbonate molding material

Abstract

The invention provides a composition of a polycarbonate molding material, and relates to the field of polycarbonate. The material comprises the following raw materials in percentage by mass: 60-80% of polycarbonate, 3-25% of poly (siloxane-bisphenol A copolycarbonate) and 1-10% of an impact modifier, 0.5-3.5% of an organic silicon composition and 4-13% of a flame retardant. According to the polycarbonate composition obtained by the formula, the total halogen content is less than 50 ppm, the fluorine element content is less than 1 ppm, the UL flame retardant grade of V0 below 1.5 mm is achieved, and the dripping phenomenon does not exist.

Description

Technical Field

[0001] The invention relates to the field of polycarbonate materials, in particular to a composition of polycarbonate molding materials. Background Art

[0002] Polycarbonate (PC) resins have a variety of important commercial applications due to their strength and transparency. However, conventional polycarbonate resins have poor flame retardancy and, when burned, will drip hot molten material, causing nearby materials to catch fire. Therefore, in order to improve the flame retardancy of polycarbonate resins and enable the safe use of polycarbonate in commercial applications, flame retardants or additives that reduce dripping can be added.

[0003] Among them, the main types of polycarbonate flame retardants are halogen, silicon, boron, sulfonate and phosphorus flame retardants. Halogen flame retardants have the most significant flame retardant effect, but they are highly polluting. With the ban on bromine- and chlorine-containing additives, the use of polycarbonate containing halogen flame retardants has been declining year by year. Although halogen-free flame retardants can achieve a certain flame retardant effect, they generally have problems such as poor flame retardant performance and severe dripping. Summary of the invention

[0004] The object of the present invention is to provide a composition of a polycarbonate molding material, which has excellent flame retardant properties and does not have a dripping phenomenon without containing a halogen flame retardant, especially fluorine.

[0005] The present invention solves the technical problem by adopting the following technical solutions.

[0006] On the one hand, an embodiment of the present invention provides a composition of a polycarbonate molding material, which includes the following raw materials by mass percentage: 60-80% polycarbonate, 3-25% poly(siloxane-bisphenol A copolycarbonate), 1-10% impact modifier; 0.5-3.5% silicone composition, and 4-13% flame retardant.

[0007] In some embodiments of the present invention, the siloxane content of the poly(siloxane-bisphenol A co-polycarbonate) is 15-30 wt %.

[0008] In the present invention, poly(siloxane-bisphenol A copolycarbonate) is a polymer obtained by introducing a siloxane segment into the molecular chain of polycarbonate for modification, wherein the content of siloxane is the content embedded in the molecular chain of polycarbonate, and poly(siloxane-bisphenol A copolycarbonate) can improve the low temperature resistance of polycarbonate molding materials. Its average molecular weight is 15000 to 155000 Da, and the siloxane segment can be the following units:

[0009]

[0010] Among them, in the above-mentioned siloxane chain units, the average value of E is 40-100; preferably, the siloxane segment units are:

[0011]

[0012] In some embodiments of the present invention, the impact modifier is one of an elastomer-modified graft copolymer, a copolymer of an alkenyl aromatic compound and a conjugated diene, or a mixture of the two.

[0013] In some embodiments of the present invention, the impact modifier is a mixture of one or more of styrene-ethylene-butylene-styrene, methacrylate-butadiene-styrene, acrylonitrile-butadiene-styrene, butadiene copolymer, and polycarbonate-butadiene.

[0014] The elastomer-modified graft copolymer of the present invention comprises an elastomeric polymer phase and a rigid polymer phase grafted to the elastomeric polymer phase. The glass transition temperature (Tg) of the elastomeric polymer phase is ≤10°C, more preferably ≤-10°C, or more preferably between -40°C and -80°C.

[0015] The elastomer phase may be a conjugated diene rubber; a copolymer of a conjugated diene and less than or equal to 50 wt% of a copolymerizable monomer; an olefin rubber, such as an ethylene propylene copolymer (EPR) or an ethylene-propylene-diene monomer rubber (EPDM); an ethylene-vinyl acetate rubber; a silicone rubber; a (meth)acrylic acid C 1-8 Alkyl ester; (meth)acrylic acid C 1-8 Copolymers of alkyl esters and butadiene; (meth)acrylic acid C 1-8 One or more copolymers of alkyl esters and styrene.

[0016] Specifically, the conjugated diene monomer used to prepare the elastomer phase is as follows:

[0017]

[0018] wherein each Xb is independently hydrogen, C1-5 alkyl, etc. Examples of conjugated diene monomers that can be used are butadiene, isoprene, 1,3-heptadiene, methyl-1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3-pentadiene, 1,3- and 2,4-hexadiene, etc., and combinations thereof. Specific conjugated diene homopolymers include polybutadiene and polyisoprene.

[0019] Copolymers of conjugated diene rubbers can also be used, for example, copolymers produced by aqueous free radical emulsion polymerization of conjugated dienes and monomers copolymerizable therewith. Monomers copolymerizable with conjugated dienes: monovinyl aromatic monomers containing condensed aromatic ring structures, such as vinyl naphthalene, vinyl anthracene, etc., or the following monomers:

[0020]

[0021] Wherein, each Xc is independently hydrogen, C1-12 alkyl, C3-12 cycloalkyl, C6-12 aryl, C7-12 aralkyl, C7-12 alkaryl, C1-12 alkoxy, C3-12 cycloalkyloxy, C6-12 aryloxy or hydroxyl, and R is hydrogen, C1-5 alkyl.Operable monovinyl aromatic monomers include styrene, 3-methyl styrene, 3,5-diethyl styrene, 4-n-propyl styrene, alpha-methyl styrene, alpha-methyl vinyl toluene, etc. or their combination.Styrene or alpha-methyl styrene can be used as a monomer copolymerizable with a conjugated diene monomer.

[0022] Wherein, the monomer used for (meth)acrylate can be: (meth)acrylic acid C 1-8 Alkyl esters, especially acrylic acid C 4-6 Alkyl esters, such as n-butyl acrylate, tert-butyl acrylate, n-propyl acrylate, isopropyl acrylate, 2-ethylhexyl acrylate, and the like, and homopolymers or copolymers thereof. Based on the total monomer weight, (meth)acrylic acid C 1-8 The alkyl ester monomer can be optionally polymerized in a mixture with ≤5 wt% of a comonomer of formula (6), (7), or (8). The comonomer includes, but is not limited to, a combination of one or more of butadiene, isoprene, styrene, methyl methacrylate, phenyl methacrylate, phenylethyl methacrylate, N-cyclohexyl acrylamide, vinyl methyl ether, and acrylonitrile.

[0023] Optionally, based on the total monomer weight, there may be ≤5 wt% of a multifunctional cross-linking comonomer. Such multifunctional cross-linking comonomers may include, for example, divinylbenzene, alkylene glycol di(meth)acrylates (such as glycol diacrylates), alkylene triol tri(meth)acrylates, polyester di(meth)acrylates, bisacrylamide, triallyl cyanurate, triallyl isocyanurate, allyl (meth)acrylate, diallyl maleate, diallyl fumarate, diallyl adipate, triallyl citrate, triallyl phosphate, or a combination of one or more thereof.

[0024] The rigid polymer phase grafted to the elastomeric polymer phase, the elastomer-modified graft copolymer can be based on the elastomeric polymer, the constituent monomers of the polymerized rigid phase are grafted onto the elastomeric polymer molecular chain. The grafted rigid monomers can be used as graft branches or shell structures.

[0025] The elastomer-modified graft copolymer of the present invention can be prepared by continuous, semi-batch or batch emulsion, suspension and solution polymerization methods.

[0026] On the other hand, the aromatic vinyl copolymer contains free styrene-acrylonitrile copolymer (SAN), that is, styrene-acrylonitrile copolymer without forming polymer chains. The average molecular weight of the free styrene-acrylonitrile copolymer is 50,000-200,000 Da, and the ratio of styrene to acrylonitrile can be any ratio. For example, based on the total weight of the free SAN copolymer, the free SAN can contain 75 wt% styrene and 25 wt% acrylonitrile. The composition containing free SAN is used as an impact modifier, and the free SAN can be optionally present, or the free SAN can be present independently of other impact modifiers in the composition, thereby improving the impact resistance.

[0027] In some embodiments of the present invention, the above-mentioned organosilicon composition includes polyorganosiloxane and organosilicon resin soluble in the polyorganosiloxane, and the organosilicon resin and the polyorganosiloxane can be physically mixed or the organosilicon resin can be dissolved in the polyorganosiloxane.

[0028] In some embodiments of the present invention, the organic silicone resin is MQ resin, phenyl-containing cage siloxane or phenylmethylsilsesquioxane.

[0029] The organic silicon resin of the present invention contains one or more R3SiO 1 / 2 M units and one or more of the formula SiO 4 / 2 Q unit, and optionally comprising one or more R2SiO 2 / 2 D unit and one or more RSiO 3 / 2 The invention further comprises a T unit wherein each R is independently an alkane group having 1 to 60 carbon atoms, an aromatic group, or an aromatic group and an alkane group.

[0030] The polyorganosiloxane is a high viscosity silicone fluid, preferably having a viscosity of 100-1,000,000 cps at 25° C. The viscosity is measured at 25° C. using a HBDV-IPrime Digital Brookfield ClosedCup Viscometer with a CPE-52 cone.

[0031] In some embodiments of the present invention, the polyorganosiloxane comprises at least one oligomeric siloxane additive.

[0032] In some embodiments of the present invention, the viscosity of the polyorganosiloxane is greater than 1000 cPs.

[0033] In some embodiments of the present invention, the polyorganosiloxane is one of MQ silicone resin, phenyl-containing cage siloxane, phenylmethyl silsesquioxane and dimethylsiloxane.

[0034] In some embodiments of the present invention, the flame retardant is an aromatic organic phosphorus compound having an organic aromatic group and a phosphorus-containing group, or an organic compound having a phosphorus-nitrogen bond.

[0035] In some embodiments of the present invention, the flame retardant is a mixture of one or more of bisphenol A bis(diphenyl phosphate), resorcinol bis(diphenyl phosphate), hydroquinone bis(diphenyl phosphate), phenoxyphosphazene, and resorcinol bis[di(2,6-dimethylphenyl)phosphate].

[0036] In some embodiments of the present invention, 0.01-5% of additives are further included by mass percentage.

[0037] In some embodiments of the present invention, the above-mentioned additives are one or more of fillers, reinforcing agents, antioxidants, heat stabilizers, light stabilizers, ultraviolet (UV) light stabilizers, plasticizers, lubricants, release agents, antistatic agents, colorants, surface effect additives, radiation stabilizers, flame retardants and anti-drip agents.

[0038] The polycarbonate composition may be added with a colorant composition containing a pigment and / or dye additive, for example, inorganic pigments, metal oxides and mixed metal oxides, zinc oxide, titanium dioxide, iron oxide, etc.; sulfides such as zinc sulfide, etc.; aluminates; sodium sulfosilicate sulfate, chromates, etc.; carbon black; zinc ferrite; ultramarine blue; organic pigments such as azo, diazo, quinacridone, perylene, naphthalenetetracarboxylic acid, flavanone, isoindolinone, tetrachloroisoindolone, anthraquinone, anthrone, dioxazine, phthalocyanine and azo lake; Pigment Red 101, Pigment Red 122, Pigment Red 149, Pigment Red 177, Pigment Red 179, Pigment Red 202, Pigment Violet 29, Pigment Blue 15, Pigment Blue 60, Pigment Green 7, Pigment Yellow 119, Pigment Yellow 147, Pigment Yellow 150, and Pigment Brown 24; or combinations of the above pigments.

[0039] The dye can be an organic material, a coumarin dye such as coumarin 460 (blue), coumarin 6 (green), Nile red, etc.; a lanthanide complex; a hydrocarbon and substituted hydrocarbon dye; a polycyclic aromatic hydrocarbon dye; a scintillating dye such as an oxazole or oxadiazole dye; an aryl- or heteroaryl-substituted poly (C2-8) olefin dye; a carbocyanine dye; an indanthrone dye; a phthalocyanine dye; an oxazine dye; a quinolone dye; a naphthalenetetracarboxylic acid dye; a porphyrin dye; a bis (styryl) biphenyl dye; an acridine dye; an anthraquinone dye; a cyanine dye; a methine dye; an arylmethane dye; an azo dye; an indigoid dye. dyes, thioindigo dyes, diazonium dyes; nitro dyes; quinone imine dyes; aminoketone dyes; tetrazolium dyes; thiazole dyes; perylene dyes, peronone dyes; bisbenzoxazolylthiophene (BBOT); triarylmethane dyes; xanthene dyes; thioanthene dyes; naphthalimide dyes; lactone dyes; fluorophores such as anti-Stokes shift dyes, which absorb at near-infrared wavelengths and emit at visible wavelengths, etc.; luminescent dyes, such as 7-amino-4-methylcoumarin; 3-(2'-benzothiazolyl)-7-diethylaminocoumarin; 2-(4-biphenyl)-5- (4-tert-butylphenyl)-1,3,4-oxadiazole; 2,5-bis-(4-biphenyl)-oxazole; 2,2'-dimethyl-p-tetraphenylene; 2,2-dimethyl-p-terphenylene; 3,5,3",5"-tetra-tert-butyl-p-pentaphenylene; 2,5-diphenylfuran; 2,5-diphenyloxazole; 4,4'-diphenylstilbene; 4-dicyanomethylidene-2-methyl-6-(p-dimethylaminophenyl)-4H-pyran; 1,1'-diethyl-2,2'-carbocyanine iodide; 3,3'-diethyl-4,4',5,5' -dibenzothiatricarbocyanine iodide; 7-dimethylamino-1-methyl-4-methoxy-8-azaquinolone-2; 7-dimethylamino-4-methylquinolone-2; 2-(4-(4-dimethylaminophenyl)-1,3-butadienyl)-3-ethylbenzothiazolium perchlorate; 3-diethylamino-7-diethyliminophenoxazinium perchlorate; 2-(1-naphthyl)-5-phenyloxazole; 2,2'-p-phenylene-bis(5-phenyloxazole); rhodamine 700; rhodamine 800; pyrene, rubrene, coronene, etc.; or a combination of multiple thereof.

[0040] The composition formed from the above pigments and dyes can have any suitable color, including white, gray, light gray, black, etc. White or light gray can exhibit an L* value greater than or equal to 80. The composition having white or light gray can contain an amount of titanium dioxide in an amount of 0.1 to 5 wt %, each based on the total weight of the polycarbonate composition.

[0041] The gray or black color may exhibit an L* value of less than 80. The composition having a gray or black color may include carbon black in an amount greater than zero and less than 1.5 wt %, based on the total weight of the colorant composition.

[0042] The composition provided by the present invention can be prepared into products by injection molding, extrusion molding, rotational molding, blow molding and thermoforming, and can be used in the fields of daily necessities, such as mobile phone housings, electrical connectors, lighting equipment components, decorations, household appliances, roofs, greenhouses, sunrooms, helmets, electric vehicle power supply equipment (EVSE) housings, etc.; it has wide applications in industry and aerospace.

[0043] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0044] The polycarbonate molding material composition provided by the present invention can improve the anti-drip property without damaging its flame retardant performance. Its total halogen content is less than 50ppm, and the fluorine content is less than 1ppm. It has a UL flame retardant grade of V0 at 1.5mm, has no dripping phenomenon, and has a melt volume rate of 5-20cm measured according to ISO 1133 (260℃, 2.16kg). 3 / 10min. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to specific embodiments.

[0047] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0048] Example

[0049] Prepare the raw materials according to Table 1.

[0050] Table 1 Raw material models and sources

[0051] Code model describe supplier PC 1 2070 Ordinary PC with Meltfinger 6 Wanhua Chemical PC 2 FN1700 Ordinary PC with a melt index of 30 Idemitsu Japan PC 3 PK2870-111 Melt index 2.5, branched PC SABIC PC 4 PC1300-03 Melt index 2.5, general PC LG Chem SiPC D0013 20% by weight siloxane copolymer PC terminated with p-cumylphenol Gansu Juyin Chemical ABS1 SAN320 25% acrylonitrile-75% styrene polymer Kumho, South Korea ABS2 HR181 High rubber powder 58% butadiene Kumho, South Korea ABS 3 PA-757 Emulsion ABS Chimei ABS 4 8343 Ontology ABS Shanghai Gaoqiao Petrochemical MBS1 Paraloid EXL2691J MBS toughening agent, acrylic acid grafted 78% SBR Dow Chemical MBS2 Metablen S-2030 Siloxane grafted MMA Mitsubishi Chemical SI-Additive 1 silicone 1 10,000 viscosity hydroxy silicone oil Shandong Dayi Chemical SI-Additive 2 Silicone 2 100,000 viscosity hydroxy silicone oil Shandong Dayi Chemical SI-Additive 3 Silicone 3 250,000 viscosity hydroxy silicone oil Shandong Dayi Chemical SI-Additive 4 Silicone 4 500,000 viscosity hydroxy silicone oil Shandong Dayi Chemical SI-Additive 5 silicone 5 1 million viscosity hydroxy silicone oil Shandong Dayi Chemical SI-Additive 6 siloxane 1 Methyl MQ resin with MQ=0.68 Shandong Dayi Chemical SI-Additive 7 siloxane 2 Cheerspearl 7000 Suzhou Qitian New Materials SI-Additive 8 FR-300 Phenyl Methyl Silsesquioxane Shanghai Puxin Antioxidant 1 TBPP Antioxidant 168 BASF Antioxidant 2 AO1076 Antioxidant 1076 BASF Flame retardant 1 Phosphazene Shandong Shouguang Chemical Flame retardant 2 BDP Bisphenol A bis(diphenyl phosphate) Zhejiang Wansheng Flame retardant 3 RDP Resorcinol bis(diphenyl phosphate) Zhejiang Wansheng Flame retardant 4 PX-200 Resorcinol bis[bis(2,6-dimethylphenyl)phosphate] Japan Daihachi Chemistry Flame retardant 5 Fyrolfelx solDP Hydroquinone bis(diphenyl phosphate) ICL PETS PETS-AP Release agent, pentaerythritol tetrastearate Italy Faji Chemical TALC HTP ultra 5L Talc talcum powder Imifabi Toner 1 CT-110 Surface treated titanium dioxide Yuanchuang Chemical

[0052] Among them, PC1-4 and SiPC refer to different types of polycarbonate, and ABS1-4 and MBS1-2 are impact modifiers.

[0053] In the embodiments provided by the present invention, the different organosilicon compositions used are prepared as follows:

[0054] Silicone composition A1

[0055] 500 g of SI-additive 6 was dissolved in 500 g of toluene and mixed with 1 kg of SI-additive 1 after being completely dissolved into a clear solution and mechanically stirred for 15 minutes to form a uniform mixture. The mixture was placed in a vacuum oven and baked at 120°C for 24 hours until the toluene was completely evaporated.

[0056] Silicone composition A2

[0057] 500 g of SI-additive 6 was dissolved in 500 g of toluene and mixed with 1 kg of SI-additive 2 after being completely dissolved into a clear solution and mechanically stirred for 15 minutes to form a uniform mixture. The mixture was placed in a vacuum oven and baked at 120°C for 24 hours until the toluene was completely evaporated.

[0058] Silicone composition A3

[0059] 500 g of SI-additive 6 was dissolved in 500 g of toluene and mixed with 1 kg of SI-additive 3 after being completely dissolved into a clear solution and mechanically stirred for 15 minutes to form a uniform mixture. The mixture was placed in a vacuum oven and baked at 120°C for 24 hours until the toluene was completely evaporated.

[0060] Silicone composition A4

[0061] 500 g of SI-additive 6 was dissolved in 500 g of toluene and mixed with 1 kg of SI-additive 4 after being completely dissolved into a clear solution and mechanically stirred for 15 minutes to form a uniform mixture. The mixture was placed in a vacuum oven and baked at 120°C for 24 hours until the toluene was completely evaporated.

[0062] Silicone composition A5

[0063] 500 g of SI-additive 6 was dissolved in 500 g of toluene and mixed with 1 kg of SI-additive 5 after being completely dissolved into a clear solution and mechanically stirred for 15 minutes to form a uniform mixture. The mixture was placed in a vacuum oven and baked at 120°C for 24 hours until the toluene was completely evaporated.

[0064] Based on the raw materials in Table 1 and the organosilicon compositions A1-5, the compositions of polycarbonate molding materials were prepared according to the proportions in Tables 2-5.

[0065] Table 2

[0066]

[0067]

[0068] Comparative Examples CE1-CE11 in Table 2, using different methods including improving melt strength, reducing the amount of ABS and titanium dioxide, adding different types of silicone, charring accelerator talc and changing flame retardant, all failed to obtain UL94 V-0 flame retardancy.

[0069] Table 3

[0070]

[0071] According to Table 3, the following adjustments are made: 1. Improving the melt strength of the polycarbonate composition; 2. Compounding different silicones; 3. Minimizing the ABS content to obtain the UL94 flame retardant V-0 grade. Based on the CE5 formula, the amount of silicone fluid A3 is gradually increased, and FR-300 is appropriately reduced to obtain the E1-E3 formula. From Table 3, it can be concluded that the polycarbonate composition of the E1-E3 formula has no dripping phenomenon during combustion and reaches the V-0 flame retardant grade.

[0072] In the E4 formula, a compound of silicone fluid A4 and siloxane copolymer PC is used, the flame retardant is changed and titanium dioxide is added, which also achieves a V-0 flame retardant grade.

[0073] It can be concluded from Table 3 that the polycarbonate composition of the embodiment provided by the present invention has a UL flame retardant grade of V0 and good flame retardant performance. The polycarbonate composition does not contain fluorine element and meets environmental protection requirements. Secondly, there is no dripping phenomenon during the combustion process.

[0074] Table 4

[0075] Components unit E6 E7 E8 E9 E10 E11 E12 PC 1 wt% 51.04 51.04 51.04 76.04 51.04 51.04 51.04 PC 4[PC1300-03] wt% 20 20 20 / 20 20 20 SiPC[D0013] wt% 10 10 10 10 10 10 10 ABS3

[8343] wt% 3 3 3 3 3 3 3 A1 wt% 2.5 / / / / / / A2 wt% / 2.5 / / / / / A3 wt% / / 2.5 / / / / A4 wt% / / / 2.5 2.5 2.5 2.5 Flame retardant 1 phosphazene wt% / / / 5 / / / Flame retardant 2BDP wt% 10 10 10 / / / 8 Flame retardant 3RDP wt% / / / / 10 / / Flame retardant 5SolDP wt% / / / / / 10 2 PETS wt% 0.3 0.3 0.3 0.3 0.3 0.3 0.3 Toner 1 wt% 3 3 3 3 3 3 3 Antioxidant 1 wt% 0.08 0.08 0.08 0.08 0.08 0.08 0.08 Antioxidant 2 wt% 0.08 0.08 0.08 0.08 0.08 0.08 0.08 sum wt% 100 100 100 100 100 100 100 characteristic unit E5 E6 E7 E8 E9 E10 E11 MVR <![CDATA[cm 3 / 10min]]> 8.5 5.8 12.4 Flame retardant grade UL94 V-0 V-0 V-0 V-0 V-0 V-0 V-0 Is the burning dripping? no no no no no no no

[0076] In the formulations of Examples E5-E8, silicone fluids A1-A5 with different viscosities were added, and the results showed that silicone fluids A1-A5 with different viscosities and siloxane copolymer PC compounding could achieve flame retardant V-0 grade. Examples E9-E12 showed that different flame retardant combinations could also achieve flame retardant V-0 grade.

[0077] Table 5

[0078]

[0079]

[0080] Comparing Table 4 and Table 5, the results of E12 and E16 formulas show that different types of ABS have no difference in flame retardant V-0 rating. Comparative Examples CE15-CE17 show that when ABS is added or MBS is added without adding flame retardant, the flame retardant effect of the polycarbonate composition becomes worse and the rating cannot reach V-0. Examples E14-E18 show that increasing the amount of ABS and adding flame retardant can achieve flame retardant V-0 rating.

[0081] E19 shows that the combination of siloxane copolymer PC and phenylmethylsilsesquioxane with phosphorus-based flame retardant can achieve flame retardancy V-0.

[0082] In summary, the composition of the polycarbonate molding material provided by the invention can improve the anti-drip property without compromising its flame retardant performance. Its total halogen content is less than 50 ppm, and its fluorine content is less than 1 ppm. It has a UL flame retardant rating of V0 at 1.5 mm, has no dripping phenomenon, and has a melt volume rate of 5-20 cm / s measured according to ISO 1133 (260°C, 2.16 kg). 3 / 10min.

[0083] The embodiments described above are part of the embodiments of the present invention, rather than all of the embodiments. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A composition of a polycarbonate molding material, It is characterized in that The invention comprises the following raw materials by mass percentage: 60-80% of polycarbonate, 3-25% of poly(siloxane-bisphenol A copolycarbonate), 1-10% of impact modifier, 0.5-3.5% of organic silicon composition and 4-13% of flame retardant.

2. The polycarbonate molding material composition according to claim 1, It is characterized in that The poly(siloxane-bisphenol A copolycarbonate) has a siloxane content of 15-30 wt %.

3. The composition of the polycarbonate molding material according to claim 1, It is characterized in that The impact modifier is one of an elastomer-modified graft copolymer, a copolymer of an alkenyl aromatic compound and a conjugated diene, or a mixture of the two.

4. The polycarbonate molding material composition according to claim 3, It is characterized in that The impact modifier is a mixture of one or more of styrene-ethylene-butylene-styrene, methacrylate-butadiene-styrene, acrylonitrile-butadiene-styrene, butadiene copolymer, and polycarbonate-butadiene.

5. The composition of the polycarbonate molding material according to claim 1, It is characterized in that The organic silicon composition comprises polyorganosiloxane and an organic silicon resin soluble in the polyorganosiloxane.

6. The polycarbonate molding material composition according to claim 5, Features The organic silicone resin is one of MQ resin, phenyl-containing cage siloxane or phenylmethylsilsesquioxane.

7. The polycarbonate molding material composition according to claim 5, wherein the polyorganosiloxane comprises at least one oligomeric siloxane additive.

8. The composition according to claim 5, wherein the polyorganosiloxane is one of MQ silicone resin, phenyl-containing cage siloxane, phenylmethylsilsesquioxane or dimethylsiloxane.

9. The polycarbonate molding material composition of claim 5, wherein the viscosity of the polyorganosiloxane is greater than 1000 cPs.

10. The polycarbonate molding material composition according to claim 1, It is characterized in that The flame retardant is an aromatic organic phosphorus compound having an organic aromatic group and a phosphorus-containing group, or an organic compound having a phosphorus-nitrogen bond.

11. The polycarbonate molding material composition according to claim 10, It is characterized in that The flame retardant is a mixture of one or more of bisphenol A bis(diphenyl phosphate), resorcinol bis(diphenyl phosphate), hydroquinone bis(diphenyl phosphate), phenoxyphosphazene, and resorcinol bis[di(2,6-dimethylphenyl)phosphate].

12. The polycarbonate molding material composition according to claim 1, It is characterized in that Calculated by mass percentage, 0.01-5% of additives are also included.

13. The composition of the polycarbonate molding material according to claim 12, It is characterized in that The additive is one or more of a filler, a reinforcing agent, an antioxidant, a heat stabilizer, a light stabilizer, an ultraviolet light stabilizer, a plasticizer, a lubricant, a release agent, an antistatic agent, a colorant, a surface effect additive, a radiation stabilizer, a flame retardant and an anti-drip agent.

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