Add the fine fire-retardant non-halogen PC/PBT alloy material and preparation method thereof that strengthensTechnical field
The present invention relates to technical field of polymer materials, specifically one adds the fine fire-retardant non-halogen PC/PBT alloy material and preparation method thereof that strengthens.
Background technology
Polycarbonate (PC) and polybutylene terephthalate (PBT) all belong to general engineering plastic.PC excellent performance, especially shock strength is high, rank first, and creep resistant is good in engineering plastics, and second-order transition temperature is high, can in the scope of 120 ℃～130 ℃, use continuously, has good electrical insulating property and dimensional stability.But the melt viscosity of PC is large, poor fluidity, poor solvent resistance, wears no resistance.PBT is a kind of crystallization velocity thermoplastic engineering plastic faster, has excellent solvent resistance, and fluidity of molten is good, but the second-order transition temperature of PBT is low, high temperature rigid deficiency, and notch sensitivity is large.Therefore, by PC and PBT blend, can overcome PBT poor heat resistance, shock-resistance is low, notched Izod impact strength is not high shortcoming, make up the deficiency of PC chemical proofing, forming process and wear resistance simultaneously, there is good practical prospect.But the notched Izod impact strength of blend PC/PBT alloy material is low, flame retardant resistance is not high.Although can emit CO when PC burning2can certainly put out, but its oxygen index is only 21%～24%, can not meets the requirement of some fields to flame retardant properties.Although adopt interpolation halogen flame can play gratifying flame retardant effect, but halogen flame is easily emitted irritant and corrosive hydrogen halide in the time of burning, particularly some halogen-containing class flame-retardant systems are in the time of Pintsch process and burning, produce poisonous PBDF (PBDF) and many bromos dibenzo uh alkane (PBDD), this constitutes a serious threat to life and property safety.Therefore, PC/PBT alloy material is added to fine enhancing and fire-retardant non-halogen being very important.
Summary of the invention
The object of the present invention is to provide a kind ofly have that impact property is good, physical strength is high, fine heat-resisting performance, non-halogen flame-proof smoke-restraining are nontoxic adds the fine fire-retardant non-halogen PC/PBT alloy material and preparation method thereof that strengthens.
The technical solution adopted for the present invention to solve the technical problems is: add the fine fire-retardant non-halogen PC/PBT alloy material that strengthens, its component by mass percent proportioning is: PC 20%～50%, PBT 20%～50%, glass fibre 10%～30%, halogen-free flame retardants 12%～20%, compatilizer 0.5%～2%, triphenyl phosphite 0.5%～1%, lubricant 0.1%～2%, oxidation inhibitor 0.1%～1%.
Described PC is polycarbonate, and relative molecular weight is between 2800～3600.
Described PBT is polybutylene terephthalate, and relative molecular weight is between 3000～3500.
Described glass fibre is the alkali free glass fibre that processed through silane coupling agent on surface.
Described halogen-free flame retardants is the one in the two diphenyl phosphoesters (BDP) of dihydroxyphenyl propane, Resorcinol diphenyl phosphoester (RDP), bicyclo cage shaped phosphorous tetra-coordinated Silicon fire retardant (CPQS), containing phosphorus silicon fire retardant (DOPO-TMDS), Phosphaphenanthrene fire retardant (DOPMI).
Described compatilizer is ethylene-methyl acrylate-glyceryl methacrylate terpolymer (E-MA-GMA).
Described lubricant is the one in EVA wax, OP wax, TAS-2A, ethylene bis stearic acid amide (EBS), calcium stearate.
Described oxidation inhibitor is the compound of primary antioxidant 1076 and auxiliary anti-oxidant 168.
The above-mentioned preparation method who adds the fire-retardant non-halogen PC/PBT alloy material of fine enhancing, comprises the following steps:
(1) PC is dried to 3～4 hours at 120 ℃～130 ℃, moisture control is below 0.02%, stand-by;
(2) PBT is dried to 3～4 hours at 130 ℃～150 ℃, moisture control is below 0.03%, stand-by;
(3) halogen-free flame retardants is dried to 30～45 minutes at 80 ℃～100 ℃, stand-by;
(4) PC, the PBT and the halogen-free flame retardants that take by weight ratio after drying treatment add high-speed mixer, mix, then add the compatilizer, triphenyl phosphite, lubricant and the oxidation inhibitor that take by weight ratio, make fully to mix together 5～15 minutes;
(5) the more above-mentioned material mixing is added to the main spout of twin screw extruder, and the glass fibre that the surface taking was by weight ratio processed through silane coupling agent adds from the side spout of twin screw extruder, processing temperature is controlled at 190 ℃～255 ℃, screw speed is 300～600 revs/min, shearing by twin screw extruder, mixing, extrude, then carry out cooling, air-dry, pelletizing, be drying to obtain the fine fire-retardant non-halogen PC/PBT alloy material that strengthens that adds of the present invention.
The invention has the beneficial effects as follows, adopt and add the PC/PBT alloy material that glass fibre strengthens and the non-halogen modification of fire retardant makes, not only have both and have PC and PBT advantage separately, there is good over-all properties, and halogen-free flameproof reaches efficiently, safety, press down the effect of cigarette, nontoxic and UL94V-0 fire retardant, glass strengthens shock strength, tensile strength, flexural strength and the heat-drawn wire etc. that have significantly improved material.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with specific embodiment.
Embodiment 1:
One adds the fine fire-retardant non-halogen PC/PBT alloy material that strengthens, and its component by mass percent proportioning is: the compound 0.5% of the two diphenyl phosphoesters (BDP) 16% of alkali free glass fibre 20%, dihydroxyphenyl propane, ethylene-methyl acrylate-glyceryl methacrylate terpolymer (E-MA-GMA) 1%, triphenyl phosphite 1%, OP wax 1.5%, primary antioxidant 1076 and the auxiliary anti-oxidant 168 that processed through silane coupling agent on PC 30%, PBT 30%, surface.Wherein, described PC is polycarbonate, and relative molecular weight is between 2800～3600.Described PBT is polybutylene terephthalate, and relative molecular weight is between 3000～3500.
Preparation method: (1) is dried 3～4 hours by PC at 120 ℃～130 ℃, and moisture control is below 0.02%, stand-by; (2) PBT is dried to 3～4 hours at 130 ℃～150 ℃, moisture control is below 0.03%, stand-by; (3) two dihydroxyphenyl propane diphenyl phosphoesters (BDP) are dried to 30～45 minutes at 80 ℃～100 ℃, stand-by; (4) PC, the PBT and the two diphenyl phosphoesters (BDP) of dihydroxyphenyl propane that take by weight ratio after drying treatment add high-speed mixer, mix, the compound that adds again the ethylene-methyl acrylate-glyceryl methacrylate terpolymer (E-MA-GMA), triphenyl phosphite, OP wax and primary antioxidant 1076 and the auxiliary anti-oxidant 168 that take by weight ratio, makes fully to mix together 5～15 minutes; (5) the more above-mentioned material mixing is added to the main spout of twin screw extruder, and the alkali free glass fibre that the surface taking was by weight ratio processed through silane coupling agent adds from the side spout of twin screw extruder, processing temperature is controlled at 190 ℃～255 ℃, screw speed is 300～600 revs/min, shearing by twin screw extruder, mixing, extrude, then carry out cooling, air-dry, pelletizing, be drying to obtain the fine fire-retardant non-halogen PC/PBT alloy material that strengthens that adds of the present invention.
Embodiment 2:
One adds the fine fire-retardant non-halogen PC/PBT alloy material that strengthens, and its component by mass percent proportioning is: the compound 0.5% of alkali free glass fibre 10%, containing phosphorus silicon fire retardant (DOPO-TMDS) 12%, ethylene-methyl acrylate-glyceryl methacrylate terpolymer (E-MA-GMA) 1%, triphenyl phosphite 0.5%, ethylene bis stearic acid amide (EBS) 1%, primary antioxidant 1076 and the auxiliary anti-oxidant 168 that processed through silane coupling agent on PC 50%, PBT 25%, surface.Wherein, described PC is polycarbonate, and relative molecular weight is between 2800～3600.Described PBT is polybutylene terephthalate, and relative molecular weight is between 3000～3500.
Preparation method: (1) is dried 3～4 hours by PC at 120 ℃～130 ℃, and moisture control is below 0.02%, stand-by; (2) PBT is dried to 3～4 hours at 130 ℃～150 ℃, moisture control is below 0.03%, stand-by; (3) containing phosphorus silicon fire retardant (DOPO-TMDS) is dried to 30～45 minutes at 80 ℃～100 ℃, stand-by; (4) PC, the PBT and the containing phosphorus silicon fire retardant (DOPO-TMDS) that take by weight ratio after drying treatment add high-speed mixer, mix, the compound that adds again the ethylene-methyl acrylate-glyceryl methacrylate terpolymer (E-MA-GMA), triphenyl phosphite, ethylene bis stearic acid amide (EBS) and primary antioxidant 1076 and the auxiliary anti-oxidant 168 that take by weight ratio, makes fully to mix together 5～15 minutes; (5) the more above-mentioned material mixing is added to the main spout of twin screw extruder, and the alkali free glass fibre that the surface taking was by weight ratio processed through silane coupling agent adds from the side spout of twin screw extruder, processing temperature is controlled at 190 ℃～255 ℃, screw speed is 300～600 revs/min, shearing by twin screw extruder, mixing, extrude, then carry out cooling, air-dry, pelletizing, be drying to obtain the fine fire-retardant non-halogen PC/PBT alloy material that strengthens that adds of the present invention.