Halogen-free fluorine-free flame-retardant PC composite material

Abstract

Provided in the present invention is a halogen-free fluorine-free flame-retardant PC composite material. The material comprises the following components in parts by weight: 84-98.6 parts of PC; 0-5 parts of a toughening agent; 0-4 parts of a toughening compatibilizer; 0.9-3 parts of a flame retardant, 0.05-2 parts of an anti-dripping agent; and 0.05-2 parts of an antioxidant, wherein the PC is PCR-PC (recycled PC); and the anti-dripping agent is a fluorine-free anti-dripping agent selected from one of or a combination of more of a silicon-based material anti-dripping agent, a carbon-based material anti-dripping agent, a whisker material anti-dripping agent, and an inorganic-clay-based material anti-dripping agent. The composite material of the present invention does not contain halogen compounds or fluorine-containing compounds; therefore, the risk of secondary pollution during the recycling of the material can be lowered, and the material is environmentally friendly. Moreover, the composite material has improved flame retardancy, and also has good mechanical properties.

Description

Halogen-free and fluorine-free flame-retardant PC composite material TECHNICAL FIELD

[0001] The present application relates to the technical field of composite materials, and in particular to a halogen-free and fluorine-free flame-retardant PC composite material. BACKGROUND

[0002] PC has excellent mechanical properties, dimensional stability, heat resistance, UV resistance and electrical properties, and is widely used in business communication equipment, automotive interior parts and household electronic appliances. The flame-retardant grade of PC itself is UL94 V-2 level, while the electronic appliance industry generally requires V-0 level. The common method to improve the flame-retardant property of PC is to use halogen-containing flame retardants and polytetrafluoroethylene (referred to as "PTFE") anti-dripping agent. If the polytetrafluoroethylene anti-dripping agent is not added, the thin-walled PC composite material prepared is prone to dripping, and the flame-retardant grade cannot reach V-0 level. Although the combination of halogen-containing flame retardants and polytetrafluoroethylene anti-dripping agent can significantly improve the flame-retardant effect of the composite material, reduce the cost, and improve the anti-aging performance of the material, but due to the generation of a large amount of toxic gas and harmful substances after thermal decomposition, it is very harmful to the environment and health.

[0003] Whether it is a perfluorobutyl sulfonate flame retardant or a PTFE-containing anti-dripping agent, it will contain perfluoro or polyfluoroalkyl substances ("Per- and polyfluoroalkyl substances", referred to as PFAS, which are products in which the hydrogen in organic matter is completely or partially replaced by fluorine). PFAS has a very strong and stable carbon-fluorine bond, making PFAS compounds extremely stable and not easily decomposed by natural processes (i.e. heat, light, and microbial action). Their extremely strong anti-degradation ability can cause potential and long-term harm to human health and the ecological environment.

[0004] Therefore, the present application provides a halogen-free and fluorine-free flame-retardant PC composite material to solve the above problems. SUMMARY

[0005] The technical problem to be solved by the present application is that the current method of using halogen-containing flame retardants and fluorine-containing anti-dripping agents to improve the flame retardancy of PC composite materials has good effects, but the composite material prepared will generate a large amount of toxic gas and harmful substances after thermal decomposition, and the PFAS contained in the fluorine-containing PC composite material is not easily degraded, which will cause long-term harm to the ecological environment and human health. The present application provides a halogen-free and fluorine-free flame-retardant PC composite material to solve the above problems.

[0006] The technical problem of the present application is solved by the following scheme: a halogen-free and fluorine-free flame-retardant PC composite material, comprising the following components by weight:

[0007] PC, 84~98.6 parts;

[0008] Toughening agent, 0~5 parts;

[0009] Toughening compatibilizer, 0~4 parts;

[0010] Flame retardant, 0.9~3 parts;

[0011] Anti-dripping agent, 0.05~2 parts;

[0012] Antioxidant, 0.05~2 parts;

[0013] The PC is PCR-PC (recycled PC).

[0014] The anti-dripping agent is a fluorine-free type anti-dripping agent, and is one or more of silicon-based material anti-dripping agent, carbon-based material anti-dripping agent, whisker material anti-dripping agent, and inorganic clay material anti-dripping agent.

[0015] Preferably, the PC is one or more of bisphenol A type polycarbonate, polyester type polycarbonate, organic silicon copolymer type polycarbonate, cyclohexane bisphenol A type polycarbonate, and bisphenol TMC synthesized polycarbonate, with a melt mass flow rate MI=(4~70) g / 10 min (300℃ / 1.2Kg), a weight average molecular weight of 20000~50000, and a molecular weight distribution of 1~2.5.

[0016] Preferably, the toughening agent is one or more of unsaturated rubber-based toughening agent, saturated rubber-based toughening agent, styrene-based thermoplastic elastomer toughening agent, polyurethane-based thermoplastic elastomer toughening agent, polyolefin-based thermoplastic elastomer toughening agent, polyamide-based thermoplastic elastomer toughening agent, high glue powder-based toughening agent, organic silicon / acrylic composite rubber-based toughening agent, acrylate copolymer (ACR), ethylene-methyl acrylate copolymer, n-butyl acrylate-glycidyl ester, and their derivatives.

[0017] Preferably, the toughening compatibilizer is one or more of carboxylic acid type toughening compatibilizer, cyclic anhydride type toughening compatibilizer (MAH), epoxy type toughening compatibilizer, oxazoline type toughening compatibilizer, imide type toughening compatibilizer, isocyanate type toughening compatibilizer, low molecular type toughening compatibilizer, and their derivatives.

[0018] Preferably, the flame retardant is a combination of sulfonate-based flame retardant and organic silicon-based flame retardant, and the organic silicon-based flame retardant is a combination of organic polysiloxane flame retardant and organosiloxane flame retardant.

[0019] Preferably, the silicon-based material anti-dripping agent includes silicon nanotubes, wollastonite, talcum powder; the carbon-based material anti-dripping agent includes single-walled carbon nanotubes (CNT), multi-walled carbon nanotubes; the whisker material anti-dripping agent includes calcium sulfate whiskers, magnesium sulfate whiskers; the inorganic clay material anti-dripping agent includes montmorillonite.

[0020] Preferably, the antioxidant is a complex of one or more of hindered phenolic antioxidants, phosphite antioxidants, and thio antioxidants.

[0021] Preferably, the hindered phenolic antioxidant includes (beta-3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl acrylate; the phosphite antioxidant includes tris(2,4-di-tert-butylphenyl) phosphite, dioctadecyl alcohol pentaerythritol diphosphite; the thio antioxidant includes dilauryl thiodipropionate (DLTDP), dioctadecyl thiodipropionate (DSTDP).

[0022] A preparation method of a halogen-free and fluorine-free flame-retardant PC composite material, characterized in that: after the components are uniformly mixed, they are put into an extruder for extrusion and granulation, the extruder is a single-screw extruder, the processing temperature interval of the extruder is set to 270 DEG C~290 DEG C, and the screw rotation speed of the extruder is 400~600 RPM.

[0023] The beneficial effects of the present application are that, by adding a complex halogen-free compound flame retardant, a fluorine-free anti-dripping agent and other additives in PC, the prepared composite material achieves a better flame-retardant grade while maintaining good mechanical properties, the prepared composite material does not contain halogen compounds and fluorine compounds, and when recycled, the risk of secondary pollution can be reduced, and the environmental friendliness of the composite material is improved. DETAILED DESCRIPTION

[0024] To further illustrate the technical means adopted by the present application and its effects, the following describes the embodiments of the present application in detail in combination with the drawings thereof.

[0025] The present application provides a halogen-free and fluorine-free flame-retardant PC composite material, which comprises the following components by weight:

[0026] PC, 84~98.6 parts;

[0027] Toughening agent, 0~5 parts;

[0028] Toughening compatibilizer, 0~4 parts;

[0029] Flame retardant, 0.9~3 parts;

[0030] Anti-dripping agent, 0.05~2 parts;

[0031] Antioxidant, 0.05~2 parts;

[0032] The PC is PCR-PC (recycled material PC) in the application.

[0033] The anti-dripping agent is a fluorine-free type anti-dripping agent, and is one or more of a silicon-based material anti-dripping agent, a carbon-based material anti-dripping agent, a whisker material anti-dripping agent, and an inorganic clay material anti-dripping agent.

[0034] The PC is one or more of bisphenol A type polycarbonate, polyester type polycarbonate, organic silicon copolymer type polycarbonate, cyclohexane bisphenol A type polycarbonate, and bisphenol TMC synthesized polycarbonate, with a melt mass flow rate MI=(4~70) g / 10 min (300℃ / 1.2Kg), a weight average molecular weight of 20000~50000, and a molecular weight distribution of 1~2.5.

[0035] The toughening agent is one or more of an unsaturated rubber-based toughening agent, a saturated rubber-based toughening agent, a styrene-based thermoplastic elastomer toughening agent, a polyurethane-based thermoplastic elastomer toughening agent, a polyolefin-based thermoplastic elastomer toughening agent, a polyamide-based thermoplastic elastomer toughening agent, a high glue powder-based toughening agent, an organic silicon / acrylic composite rubber-based toughening agent, an acrylic ester-based copolymer (ACR), an ethylene-methyl acrylate copolymer, n-butyl acrylate-glycidyl ester, and their derivatives.

[0036] The unsaturated rubber-based toughening agent includes nitrile rubber (NBR), natural rubber (NR), styrene-butadiene rubber (SBR), and cis-butadiene rubber (BR); the saturated rubber-based toughening agent includes butyl rubber (IIR), ethylene-propylene rubber (EPR), ternary ethylene-propylene rubber (EPDM), and halogenated butyl rubber; the styrene-based thermoplastic elastomer toughening agent includes methyl methacrylate-butadiene-styrene terpolymer (MBS), styrene-butadiene-styrene copolymer (SBS), hydrogenated SBS (SEBS), and styrene-isoprene-styrene (SIS); and the polyolefin-based thermoplastic elastomer toughening agent includes chlorinated polyethylene (CPE), ethylene-octene copolymer (POE), thermoplastic dynamic vulcanization rubber (TPV), and ethylene-vinyl acetate copolymer (EVA).

[0037] The toughening compatibilizer is one or more of a carboxylic acid type toughening compatibilizer, a cyclic anhydride type toughening compatibilizer (MAH), an epoxy type toughening compatibilizer, an oxazoline type toughening compatibilizer, an imide type toughening compatibilizer, an isocyanate type toughening compatibilizer, a low molecular type toughening compatibilizer, and their derivatives.

[0038] The carboxylic acid type toughening compatilizer includes ethylene-methyl acrylate copolymer (E-MA); the cyclic anhydride type toughening compatilizer includes styrene-methyl methacrylate-maleic anhydride copolymer (p(St-MMA-MAH)), styrene-butadiene-styrene copolymer grafted maleic anhydride (SBS-g-MAH), styrene-ethylene-butyl copolymer grafted maleic anhydride (SEBS-g-MAH); the epoxy type toughening compatilizer includes glycidyl methacrylate (GMA), ethylene-methyl acrylate-glycidyl methacrylate triblock copolymer (E-MA-GMA), styrene-acrylonitrile-glycidyl methacrylate copolymer (p(St-An-GMA)); the oxazoline type toughening compatilizer includes oxazoline grafted polystyrene (RPS); the imide type toughening compatilizer includes imide modified polyacrylate; the isocyanate type toughening compatilizer includes m-isopropyl-2,2-dimethylbenzene isocyanate; the low molecular type toughening compatilizer includes reactive compatilizer, reactive monomer and low molecular weight polymer.

[0039] The flame retardant is a complex of sulfonate flame retardant and organic silicon flame retardant, and the organic silicon flame retardant is a complex of organic polysiloxane flame retardant and organosiloxane flame retardant.

[0040] The silicon type material anti-dripping agent includes silicon nanotube, wollastonite and talcum powder; the carbon type material anti-dripping agent includes single-walled carbon nanotube (CNT) and multi-walled carbon nanotube; the whisker material anti-dripping agent includes calcium sulfate whisker and magnesium sulfate whisker; and the inorganic clay type material anti-dripping agent includes montmorillonite.

[0041] The antioxidant is a complex of one or more of hindered phenolic antioxidant, phosphite antioxidant and thio antioxidant.

[0042] The hindered phenolic antioxidant includes (β-3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl acrylate; the phosphite antioxidant includes tris(2,4-di-tert-butylphenyl) phosphite and dioctadecyl alcohol pentaerythritol diphosphite; and the thio antioxidant includes lauryl thiodipropionate (DLTDP) and octadecyl thiodipropionate (DSTDP).

[0043] Comparative Example 1

[0044] A PC composite material includes the following components in parts by weight: 95.8 parts of PCR-PC, 2 parts of toughening agent, 1 part of toughening compatilizer, 0.9 parts of flame retardant and 0.3 parts of antioxidant.

[0045] The 95.8 parts of PCR-PC is a compound of 15 parts of Mettler 10050 type PCR-PC and 80.8 parts of Mettler 20060 type PCR-PC, wherein the Mettler 10050 type PCR-PC has a melt mass flow rate MI = 65 g / 10 min (300℃ / 1.2Kg), a weight average molecular weight of 20000~50000, and a molecular weight distribution of 1~2.5, and the Mettler 20060 type PCR-PC has a melt mass flow rate MI = 5.1 g / 10 min (300℃ / 1.2Kg), a weight average molecular weight of 20000~50000, and a molecular weight distribution of 1~2.5.

[0046] The toughening agent is a styrene-based thermoplastic elastomer, specifically a methyl methacrylate-butadiene-styrene terpolymer (MBS).

[0047] The toughening compatilizer is a cyclic anhydride type toughening compatilizer, specifically a styrene-ethylene-butyl copolymer grafted maleic anhydride (SEBS-g-MAH), wherein the mass ratio of styrene: ethylene-butylene is 20:80.

[0048] The 0.9 parts of flame retardant is a compound of 0.5 parts of a sulfonate type flame retardant and 0.4 parts of an organic silicon type flame retardant, the sulfonate type flame retardant is selected from potassium benzenesulfonyl benzenesulfonate (KSS), and the organic silicon type flame retardant is selected from an organic polysiloxane flame retardant, specifically an SX12-B type powder flame retardant produced by Japan Shin-Etsu Chemical Industry Co., Ltd.

[0049] The 0.3 parts of antioxidant is a compound of 0.24 parts of a hindered phenol type antioxidant and 0.06 parts of a phosphite type antioxidant, the 0.24 parts of hindered phenol type antioxidant is selected from (β-3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl acrylate, and the 0.06 parts of phosphite type antioxidant is selected from tris(2,4-di-tert-butylphenyl) phosphite.

[0050] The PC composite material is prepared by weighing the components according to the above-mentioned proportions, mixing the components uniformly, and then feeding the mixture of the components into an extruder, shearing, mixing and conveying the mixture of the components by the screw of the extruder, fully melting and compounding, and then extruding, drawing, cooling and pelletizing by the die of the head of the extruder to finally obtain finished particles, wherein the extruder is a single screw extruder, the processing temperature interval of the extruder is set to 270℃~290℃, and the screw rotation speed of the extruder is 400~600 RPM.

[0051] Comparative Example 2

[0052] A PC composite material, comprising the following components by weight: 95.4 parts of PCR-PC, 2 parts of toughening agent, 1 part of toughening compatibilizer, 0.9 parts of flame retardant, 0.4 parts of anti-dripping agent, 0.3 parts of antioxidant.

[0053] The 95.4 parts of PCR-PC are a compound of 15 parts of Met 10050 type PCR-PC and 80.4 parts of Met 20060 type PCR-PC, wherein the Met 10050 type PCR-PC has a melt mass flow rate MI = 65 g / 10 min (300℃ / 1.2Kg), a weight average molecular weight of 20000~50000, and a molecular weight distribution of 1~2.5, and the Met 20060 type PCR-PC has a melt mass flow rate MI = 5.1 g / 10 min (300℃ / 1.2Kg), a weight average molecular weight of 20000~50000, and a molecular weight distribution of 1~2.5.

[0054] The toughening agent is a styrene-based thermoplastic elastomer, specifically methyl methacrylate-butadiene-styrene terpolymer (MBS).

[0055] The toughening compatibilizer is a cyclic anhydride type toughening compatibilizer, specifically styrene-ethylene-butyl copolymer grafted maleic anhydride (SEBS-g-MAH), wherein the mass ratio of styrene: ethylene-butylene is 20:80.

[0056] The 0.9 parts of flame retardant are a compound of 0.5 parts of sulfonate-based flame retardant and 0.4 parts of silicone-based flame retardant, the sulfonate-based flame retardant is selected from potassium benzenesulfonyl benzenesulfonate (KSS), and the silicone-based flame retardant is selected from an organic polysiloxane flame retardant, specifically SX12-B type powder flame retardant produced by Japan Shin-Etsu Chemical Industry Co., Ltd.

[0057] The 0.4 parts of anti-dripping agent is a fluorine-containing anti-dripping agent, selected from non-coated polytetrafluoroethylene (PTFE).

[0058] The 0.3 parts of antioxidant is a compound of 0.24 parts of hindered phenolic antioxidant and 0.06 parts of phosphite antioxidant, the 0.24 parts of hindered phenolic antioxidant is selected from (β-3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl acrylate, and the 0.06 parts of phosphite antioxidant is selected from tris(2,4-di-tert-butylphenyl) phosphite.

[0059] The PC composite material is prepared by weighing the components according to the above-mentioned proportion, mixing the components uniformly, and then feeding them into an extruder. The mixture of the components is sheared, mixed and transported by the screw of the extruder, fully melted and compounded, and then extruded through the die of the head, drawn, cooled and cut into particles to obtain the finished product. The extruder is a single-screw extruder, the processing temperature range of the extruder is set to 270-290℃, and the screw speed of the extruder is 400-600 RPM. Embodiment

[0060] A halogen-free and fluorine-free flame-retardant PC composite material comprises the following components by weight: 95.4 parts of PCR-PC, 2 parts of toughening agent, 1 part of toughening compatibilizer, 0.9 parts of flame retardant, 0.4 parts of fluorine-free anti-dripping agent, and 0.3 parts of antioxidant.

[0061] The 95.4 parts of PCR-PC is a compound of 15 parts of Met 10050 type PCR-PC and 80.4 parts of Met 20060 type PCR-PC. The Met 10050 type PCR-PC has a melt mass flow rate MI = 65 g / 10 min (300℃ / 1.2Kg), a weight average molecular weight of 20000-50000, and a molecular weight distribution of 1-2.5. The Met 20060 type PCR-PC has a melt mass flow rate MI = 5.1 g / 10 min (300℃ / 1.2Kg), a weight average molecular weight of 20000-50000, and a molecular weight distribution of 1-2.5.

[0062] The toughening agent is a styrene-based thermoplastic elastomer, specifically a methyl methacrylate-butadiene-styrene terpolymer (MBS).

[0063] The toughening compatibilizer is a cyclic anhydride type toughening compatibilizer, specifically a styrene-ethylene-butyl copolymer grafted maleic anhydride (SEBS-g-MAH), with a mass ratio of styrene:ethylene-butylene of 20:80, which can meet the elastic demand of the composite material at low temperature.

[0064] The 0.9 parts of flame retardant is a compound of 0.5 parts of sulfonate flame retardant and 0.4 parts of organic silicon flame retardant. The sulfonate flame retardant is potassium benzenesulfonyl benzenesulfonate (KSS), and the organic silicon flame retardant is an organic polysiloxane flame retardant, specifically SX12-B type powder flame retardant produced by Japan Shin-Etsu Chemical Industry Co., Ltd.

[0065] The fluorine-free anti-dripping agent is a silicon-based material anti-dripping agent, specifically S890 type anti-dripping agent produced by Dongguan Sanhe Chemical Industry.

[0066] The 0.3 part of antioxidant is a compound of 0.24 part of hindered phenolic antioxidant and 0.06 part of phosphite antioxidant, the 0.24 part of hindered phenolic antioxidant is selected from (β-3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl acrylate, and the 0.06 part of phosphite antioxidant is selected from tris (2, 4-di-tert-butylphenyl) phosphite.

[0067] The halogen-free and fluorine-free flame-retardant PC composite material is prepared by weighing the components according to the above-mentioned proportion, mixing the components uniformly, and then feeding the mixture of the components into an extruder. The mixture of the components is fully melted and compounded after being sheared, mixed and transported by the screw of the extruder, and then extruded, drawn, cooled and cut into particles by the die of the head. Finally, the finished particles are obtained. The extruder is a single-screw extruder, the processing temperature range of the extruder is set to 270-290 DEG C, and the screw speed of the extruder is 400-600 RPM. Embodiment

[0068] The halogen-free and fluorine-free flame-retardant PC composite material comprises the following components by weight: 95 parts of PCR-PC, 2 parts of toughening agent, 1 part of toughening compatibilizer, 0.9 parts of flame retardant, 0.8 parts of fluorine-free anti-dripping agent, and 0.3 parts of antioxidant.

[0069] The 95 parts of PCR-PC is a compound of 15 parts of Met 10050 type PCR-PC and 80 parts of Met 20060 type PCR-PC. The Met 10050 type PCR-PC has a melt mass flow rate MI = 65 g / 10 min (300 DEG C / 1.2 Kg), a weight average molecular weight of 20000-50000, and a molecular weight distribution of 1-2.5. The Met 20060 type PCR-PC has a melt mass flow rate MI = 5.1 g / 10 min (300 DEG C / 1.2 Kg), a weight average molecular weight of 20000-50000, and a molecular weight distribution of 1-2.5.

[0070] The toughening agent is a styrene-based thermoplastic elastomer, specifically a methyl methacrylate-butadiene-styrene terpolymer (MBS).

[0071] The toughening compatibilizer is a cyclic anhydride type toughening compatibilizer, specifically a styrene-ethylene-butyl copolymer grafted maleic anhydride (SEBS-g-MAH), wherein the mass ratio of styrene: ethylene-butene is 20:80, which can meet the elastic demand of the composite material at low temperature.

[0072] The 0.9 part of the flame retardant is a compound of 0.5 part of a sulfonate flame retardant and 0.4 part of an organic silicon flame retardant, the sulfonate flame retardant is selected from potassium benzenesulfonyl benzenesulfonate (KSS), and the organic silicon flame retardant is an organic polysiloxane flame retardant, and specifically SX12-B type powder flame retardant produced by Nippon Shokubai Co., Ltd.

[0073] The fluorine-free anti-dripping agent is a silicon-based material anti-dripping agent, and S890 type anti-dripping agent produced by Dongguan Sanhe Chemical Co., Ltd.

[0074] The 0.3 part of the antioxidant is a compound of 0.24 part of a hindered phenol antioxidant and 0.06 part of a phosphite antioxidant, the 0.24 part of the hindered phenol antioxidant is selected from (β-3, 5-di-tert-butyl-4-hydroxyphenyl) octadecanol acrylate, and the 0.06 part of the phosphite antioxidant is selected from tris(2, 4-di-tert-butylphenyl) phosphite.

[0075] To prepare the halogen-free and fluorine-free flame-retardant PC composite material, the components are weighed according to the above-mentioned proportion, and then mixed uniformly and put into an extruder. The mixture of the components is sheared, mixed and transported by the screw of the extruder, fully melted and compounded, and then extruded, drawn, cooled and cut into particles by the die of the head. Finally, the finished particles are obtained. The extruder is a single-screw extruder, the processing temperature range of the extruder is set to 270-290 DEG C, and the screw speed of the extruder is 400-600 RPM. Embodiment

[0076] A halogen-free and fluorine-free flame-retardant PC composite material comprises the following components in parts by weight: 94.4 parts of PCR-PC, 2 parts of toughening agent, 1 part of toughening compatibilizer, 1.9 parts of flame retardant, 0.4 part of fluorine-free anti-dripping agent, and 0.3 part of antioxidant.

[0077] The 94.4 parts of PCR-PC is a compound of 15 parts of Met 10050 type PCR-PC and 79.4 parts of Met 20060 type PCR-PC, the melt mass flow rate of Met 10050 type PCR-PC is 65 g / 10 min (300 DEG C / 1.2 Kg), the weight average molecular weight is 20000-50000, and the molecular weight distribution is 1-2.5, the melt mass flow rate of Met 20060 type PCR-PC is 5.1 g / 10 min (300 DEG C / 1.2 Kg), the weight average molecular weight is 20000-50000, and the molecular weight distribution is 1-2.5.

[0078] The toughening agent is a styrene-based thermoplastic elastomer, specifically methyl methacrylate-butadiene-styrene terpolymer (MBS).

[0079] The toughening compatilizer is a cyclic anhydride type toughening compatilizer, specifically a styrene-ethylene-butyl copolymer grafted maleic anhydride (SEBS-g-MAH), wherein the mass ratio of styrene: ethylene-butene is 20:80, which can meet the elastic demand of the composite at low temperature.

[0080] The 1.9 parts of the flame retardant is a compound of 0.5 parts of a sulfonate-based flame retardant and 1.4 parts of an organic silicon-based flame retardant, the sulfonate-based flame retardant is potassium benzenesulfonyl benzenesulfonate (KSS), and the 1.4 parts of the organic silicon-based flame retardant is a compound of 0.4 parts of an organic polysiloxane flame retardant and 1 part of an organosiloxane flame retardant, wherein the organic polysiloxane flame retardant is SX12-B type powder flame retardant produced by Nippon Shokubai Co., Ltd., and the organosiloxane flame retardant is 40-001 type liquid flame retardant produced by Dow Corning Corporation.

[0081] The fluorine-free anti-dripping agent is a silicon-based material anti-dripping agent, and S890 type anti-dripping agent produced by Dongguan Sanhe Chemical Industry Co., Ltd. is selected.

[0082] The 0.3 parts of the antioxidant is a compound of 0.24 parts of a hindered phenol antioxidant and 0.06 parts of a phosphite antioxidant, the 0.24 parts of the hindered phenol antioxidant is (β-3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl acrylate, and the 0.06 parts of the phosphite antioxidant is tris(2,4-di-tert-butylphenyl) phosphite.

[0083] The halogen-free and fluorine-free flame-retardant PC composite is prepared by weighing the components according to the above-mentioned proportions, uniformly mixing the components, and then feeding them into an extruder. The mixture of the components is sheared, mixed and transported by the screw of the extruder, fully melted and compounded, and then extruded, drawn, cooled and pelletized by the die of the head to obtain finished particles. The extruder is a single-screw extruder, the processing temperature range of the extruder is set to 270-290°C, and the screw speed of the extruder is 400-600 RPM.

[0084] The particles in the above comparative example 1-2 and example 1-3 are injection molded into standard test bars on an injection molding machine, and the test bars are tested for relevant physical properties according to the standard, and the test results are shown in Table 1:

[0085] Table 1 Test results

[0086] From the above test results, it can be seen that the preparation of a halogen-free and fluorine-free flame-retardant PC composite is achieved. By adding a compound of halogen-free flame retardant and fluorine-free anti-dripping agent to PC and combining with other additives, the prepared composite achieves a good flame retardant grade, maintains good mechanical properties, and improves the environmental friendliness of the composite.

[0087] It should be noted that the present application is not limited to the above-mentioned embodiments, and any simple modification, equivalent change and modification of the above-mentioned embodiments based on the technical solutions of the present application fall within the protection scope of the present application.

Claims

1. A halogen-free, fluorine-free flame-retardant PC composite material, characterized in that, The components include the following weight parts: PC, 84~98.6 parts; toughening agent, 0~5 parts; toughening compatibilizer, 0~4 parts; flame retardant, 0.9~3 parts; anti-dripping agent, 0.05~2 parts; antioxidant, 0.05~2 parts; wherein the PC is PCR-PC (recycled PC); The anti-dripping agent is a fluorine-free type anti-dripping agent, which is selected from one or more of silicon-based material anti-dripping agent, carbon-based material anti-dripping agent, whisker material anti-dripping agent, and inorganic clay material anti-dripping agent.

2. A halogen-free and fluorine-free flame-retardant PC composite material according to claim 1, characterized in that: The PC is one or more of bisphenol A type polycarbonate, polyester type polycarbonate, organic silicon copolymer type polycarbonate, cyclohexane bisphenol A type polycarbonate, and bisphenol TMC synthesized polycarbonate, with a melt mass flow rate MI=(4~70) g / 10 min (300℃ / 1.2Kg), a weight average molecular weight of 20000~50000, and a molecular weight distribution of 1~2.

5.

3. A halogen-free and fluorine-free flame-retardant PC composite material according to claim 1, characterized in that: The toughening agent is one or more of unsaturated rubber-based toughening agent, saturated rubber-based toughening agent, styrene-based thermoplastic elastomer toughening agent, polyurethane-based thermoplastic elastomer toughening agent, polyolefin-based thermoplastic elastomer toughening agent, polyamide-based thermoplastic elastomer toughening agent, high glue powder-based toughening agent, organic silicon / acrylic composite rubber-based toughening agent, acrylic ester-based copolymer (ACR), ethylene-methyl acrylate copolymer, n-butyl acrylate-glycidyl ester, and their derivatives.

4. A halogen-free and fluorine-free flame-retardant PC composite material according to claim 1, characterized in that: The toughening compatibilizer is one or more of carboxylic acid type toughening compatibilizer, cyclic anhydride type toughening compatibilizer (MAH), epoxy type toughening compatibilizer, oxazoline type toughening compatibilizer, imide type toughening compatibilizer, isocyanate type toughening compatibilizer, and low molecular type toughening compatibilizer, and their derivatives.

5. A halogen-free and fluorine-free flame-retardant PC composite material according to claim 1, characterized in that: The flame retardant is a combination of sulfonate-based flame retardant and organic silicon-based flame retardant, and the organic silicon-based flame retardant is a combination of organic polysiloxane flame retardant and organosiloxane flame retardant.

6. A halogen-free, fluorine-free flame-retardant PC composite material according to claim 1, characterized in that: The silicon-based material anti-dripping agent includes silicon nanotube, wollastonite, and talc powder; the carbon-based material anti-dripping agent includes single-walled carbon nanotube (CNT) and multi-walled carbon nanotube; the whisker material anti-dripping agent includes calcium sulfate whisker and magnesium sulfate whisker; and the inorganic clay material anti-dripping agent includes montmorillonite.

7. A halogen-free and fluorine-free flame-retardant PC composite material according to claim 1, characterized in that: The antioxidant is one or more of hindered phenol antioxidant, phosphite antioxidant, and thio antioxidant.

8. A halogen-free and fluorine-free flame-retardant PC composite material according to claim 1, characterized in that: The hindered phenol antioxidant includes (β-3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl acrylate; the phosphite antioxidant includes tris(2,4-di-tert-butylphenyl) phosphite and dioctadecyl alcohol pentaerythritol diphosphite; and the thio antioxidant includes dilauryl thiodipropionate (DLTDP) and dioctadecyl thiodipropionate (DSTDP).

9. A process for preparing a halogen-free and fluorine-free flame-retardant PC composite material according to any one of claims 1-8, characterized in that: After the components are uniformly mixed, they are put into an extruder for extrusion granulation, the extruder is a single screw extruder, the processing temperature range of the extruder is set to 270℃~290℃, and the screw rotation speed of the extruder is 400~600 RPM.