Halogen-free flame-retardant ABS (acrylonitrile butadiene styrene) resin and preparation method thereof
The invention discloses a halogen-free flame-retardant ABS (acrylonitrile butadiene styrene) resin and a preparation method thereof. The resin is composed of the following components in parts by weight: 50-70 parts of an ABS resin, 15-25 parts of a composite halogen-free flame retardant, 5-10 parts of nano clay treated by a low-molecular-weight lubricant, 5-15 parts of a flexibilizer, 0.5-2 parts of a stabilizer, 0.5-3 parts of a lubricant, 0.2-1 part of an antioxidant, and 0.1-1 part of a coupling agent. Compared with traditional flame retardant ABS resins, the halogen-free flame retardant ABS resin prepared according to the invention is subjected to filling modification by using the nano clay treated by a low-molecular-weight lubricant, so that the diffusion situation of the nano clay in a matrix resin is increased; through a synergistic effect between the nano clay and the composite halogen-free flame retardant, a purpose of improving the decomposition temperature of the flame retardant, reducing the application amount of the composite halogen-free flame retardant, and enhancing the flame retardant level of the matrix resin is achieved. 1. A halogen-free flame retardant ABS resin, characterized in that is composed of the following parts by weight of components: 2. Halogen-free flame-retardant ABS resin according to Claim 1, characterized in that the ABS resin is an acrylonitrile-styrene-butadiene terpolymer. 3. Halogen-free flame-retardant ABS resin according to Claim 1, characterized in that the composite halogen-free flame retardant is the expansion type flame-retardant the medicinal preparation gathers (4, 4-bisphenylmethyl hydrazine spiro methane pentaerythritol diphosphate) in accordance with the weight ratio of red phosphorus microencapsulated 1-5:1 weight ratio .Wide, pre-mixed at room temperature through the mixer 5-10 minutes after the mixture of; the content of the red phosphorus microencapsulated red phosphorus ≥ 85%, red phosphorus fineness the 5-10 m. 4. Halogen-free flame-retardant ABS resin according to Claim 1, characterized in that the low molecular weight lubricant processing nano clay is nano-clay with low molecular weight lubricant in accordance with the weight ratio of 100:5 .Wide, pre-mixed at room temperature through the mixer 20-40 minutes the mixture obtained; with the low molecular weight of the lubricant of the nano-clay is octadecyl ammonium bromide treated organic polynite, particle size 100-300nm; the low-molecular-weight lubricant is ethylene bis-stearamide. 5. Halogen-free flame-retardant ABS resin according to Claim 1, characterized in that the rubber is the flexibilizer high ABS, ethylene-vinyl acetate copolymer, acrylic acid esters flexibilizer, maleic anhydride grafted styrene-butadiene-styrene block copolymer or a maleic anhydride grafted hydrogenated styrene-butadiene-styrene block copolymer. 6. Halogen-free flame-retardant ABS resin according to Claim 1, characterized in that the stabilizer is calcium-zinc stabilizers, organic tin stabilizer any one of in. 7. Halogen-free flame-retardant ABS resin according to Claim 1, characterized in that said lubricant is environment-friendly ethylene dihydrogenmethylenebisphosphonate stearyl amide, pentaerythritol stearate, stearic acid, stearic acid amide, oleic acid amide, erucic acid amide in an arbitrary or a few. 8. Halogen-free flame-retardant ABS resin according to Claim 1, characterized in that the antioxidant is a hindered phenol antioxidant 1010 antioxidant phosphorous acid esters and 168 in accordance with the weight ratio of 2:1 compound, or anti-oxidant 1076 antioxidant phosphorous acid esters and 168 in accordance with the weight ratio of 2:1 compounded composite anti-oxidant. 9. Halogen-free flame-retardant ABS resin according to Claim 1, characterized in that the coupling agent as environment-friendly isopropylacrylamides three (two octyl are burnt acyloxide phosphate) titanate, double (two Xin oxygen radicals are burnt phosphorus acid ester) b supports the titanium ester, pyrophosphate single alkoxyl class titanate, γ-(methacryloxy) propyl-trimethoxysilane, γ-glycidyl ether propyl trimethoxy silane, γ-(3, 2 glycidoxy) methyl trimethoxy silane, γ-mercapto propyl triethoxy silane, γ-aminopropyl triethoxy silane in any one or of several. 10. A halogen-free flame retardant ABS resin preparation method, characterized in that the method comprises the following steps: (1) the nano-clay, and composite halogen-free flame retardant, pre-processing The ratio according to the formulation, said first lubricant with low molecular weight clay takes the nanometer adding and mixing the machine together, pre-mixed 20-40 minutes; halogen-free flame retardant composite measure 15-25 and adding coupling agent mixed evenly to the composite halogen-free flame retardant surface treatment; and then the the above-mentioned two kinds of mixture into the high-speed mixers and premixing 30-60 minutes; (2) preparation of halogen-free flame retardant ABS resin To the step (1) adding 50-70 parts of ABS resin, 5-15 parts the flexibilizer, 0.5-2 parts of stabilizer, 0.5-3 parts of lubricant, 0.2-1 parts of antioxidant, high-speed mixed 5-10 minutes, the mixture is then in a double screw extruder granulation, extrusion granulation temperature is 160-200 the [...] , halogen-free flame retardant ABS resin is obtained.