CN111675893A - Stress cracking resistant photodiffusion flame retardant polycarbonate and preparation method thereof - Google Patents
Stress cracking resistant photodiffusion flame retardant polycarbonate and preparation method thereof Download PDFInfo
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- CN111675893A CN111675893A CN202010551600.2A CN202010551600A CN111675893A CN 111675893 A CN111675893 A CN 111675893A CN 202010551600 A CN202010551600 A CN 202010551600A CN 111675893 A CN111675893 A CN 111675893A
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- 239000004417 polycarbonate Substances 0.000 title claims abstract description 56
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 55
- 239000003063 flame retardant Substances 0.000 title claims abstract description 49
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000005336 cracking Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 18
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 18
- 239000012745 toughening agent Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000002131 composite material Substances 0.000 claims abstract description 4
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- -1 pentaerythritol ester Chemical class 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 150000008301 phosphite esters Chemical class 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- AIBRSVLEQRWAEG-UHFFFAOYSA-N 3,9-bis(2,4-ditert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP1OCC2(COP(OC=3C(=CC(=CC=3)C(C)(C)C)C(C)(C)C)OC2)CO1 AIBRSVLEQRWAEG-UHFFFAOYSA-N 0.000 claims description 2
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 2
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 2
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 238000004132 cross linking Methods 0.000 claims description 2
- VONWDASPFIQPDY-UHFFFAOYSA-N dimethyl methylphosphonate Chemical compound COP(C)(=O)OC VONWDASPFIQPDY-UHFFFAOYSA-N 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- JQVXMIPNQMYRPE-UHFFFAOYSA-N ethyl dimethyl phosphate Chemical compound CCOP(=O)(OC)OC JQVXMIPNQMYRPE-UHFFFAOYSA-N 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000009477 glass transition Effects 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- UBIJTWDKTYCPMQ-UHFFFAOYSA-N hexachlorophosphazene Chemical compound ClP1(Cl)=NP(Cl)(Cl)=NP(Cl)(Cl)=N1 UBIJTWDKTYCPMQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims description 2
- GTRSAMFYSUBAGN-UHFFFAOYSA-N tris(2-chloropropyl) phosphate Chemical compound CC(Cl)COP(=O)(OCC(C)Cl)OCC(C)Cl GTRSAMFYSUBAGN-UHFFFAOYSA-N 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 claims 1
- 238000000889 atomisation Methods 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- 230000035882 stress Effects 0.000 abstract 4
- 230000006353 environmental stress Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 150000003254 radicals Chemical class 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- IAANMKMHMYZVOC-UHFFFAOYSA-N aminomethyl dihydrogen phosphate Chemical compound NCOP(O)(O)=O IAANMKMHMYZVOC-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/53—Core-shell polymer
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
The invention discloses stress cracking resistant photodiffusion flame-retardant polycarbonate and a preparation method thereof, and relates to the technical field of high polymer materials, wherein the stress cracking resistant photodiffusion flame-retardant polycarbonate comprises the following components in percentage by mass: 95% -99% of Polycarbonate (PC); 0.1 to 1 percent of atomizing agent; 0.1 to 1 percent of antioxidant; 1 to 5 percent of toughening agent; 0.01 to 0.1 percent of flame retardant; 0.001 to 0.05 percent of composite toner. The invention also provides a preparation method of the stress cracking resistant photodiffusion flame-retardant polycarbonate material. The stress cracking resistant photodiffusion flame-retardant polycarbonate provided by the invention has the advantages of good photodiffusion and flame retardance, good toughness, excellent environmental stress cracking resistance, simple manufacturing process, high feasibility and suitability for industrial production.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to stress cracking resistant photodiffusion flame retardant polycarbonate and a preparation method thereof.
Background
Polycarbonate (PC) is a high molecular polymer containing carbonate groups in the molecular chain, and has become the universal engineering plastic with the highest growth speed among five engineering plastics due to the structural particularity of polycarbonate. The polycarbonate has a density of 1.18 to 1.22g/cm3The heat distortion temperature is 135 ℃, and the color and the transparency are realized,heat resistance, impact resistance, limit oxygen index of 25%, V-2 UL 94, high strength, fatigue resistance, dimensional stability, small creep, however, its high transparency is not suitable for light diffusion effect, and the notched impact strength is low. Polycarbonate is widely applied to lamp box outer covers, light guide products and the like, but stress cracking is easy to occur in similar products, particularly large wall thickness products are produced; in addition, the light transmittance is high, so that the light diffusion effect of the product is poor; the liquid dropped during combustion easily causes nearby materials to catch fire, and is difficult to meet the higher requirements of special fields on PC. Therefore, the pure polycarbonate material or the common polycarbonate material is difficult to meet the actual application requirements of the product, and further improvement of the performance of the material is needed.
Disclosure of Invention
In order to overcome the defects of the conventional polycarbonate material, the invention provides stress cracking resistant photodiffusion flame-retardant polycarbonate and a preparation method thereof.
The invention provides stress cracking resistant photodiffusion flame retardant polycarbonate which comprises the following components in percentage by mass: 95% -99% of Polycarbonate (PC); 0.1 to 1 percent of atomizing agent; 0.1 to 1 percent of antioxidant; 1 to 5 percent of toughening agent; 0.01 to 0.1 percent of flame retardant; 0.001 to 0.05 percent of composite toner. Wherein the sum of the mass percentages of the components is 100%.
In certain embodiments of the invention, the polycarbonate has a density of 1 to 2g/cm3The mass melt index under the test conditions of 300 ℃ and 1.2kg is 10-20g/10min, and the mass melt index under the test conditions of UL-94 and 1.47mm is V-2 grade. Preferably but not limited to a density of 1.9g/cm manufactured by Nippon Kogyo Co3Polycarbonate with a mass melt index of 19g/10min under the test conditions of 300 ℃ and 1.2kg and with the commercial designation IR 1900.
In certain embodiments of the present invention, the atomizing agent is one of a silicone light diffuser or an acrylic light diffuser, has a refractive index of 1.41 to 1.43, and has an average particle size of 1 to 2 μm. Preferably, the silicone light diffuser has an average particle size of 1.5 μm and a light refractive index of 1.455, and is available under the trade designation HY-690A from American MSE.
In certain embodiments of the present invention, the antioxidant is a hindered phenol primary antioxidant and a phosphite secondary antioxidant, and specifically, is a combination of a primary antioxidant of pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and a secondary antioxidant of bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite ] in a ratio of 1: 2-1, preferably 1: 1.
in certain embodiments of the present invention, the toughening agent is one or a combination of an ACR toughening agent or a POE toughening agent.
In some embodiments of the invention, the toughening agent is an ACR401 toughening agent which takes a methyl methacrylate-ethyl acrylate copolymer as a shell and a rubber elastomer formed by crosslinking butyl acrylate as a core, the intrinsic viscosity is 0.5-1, the fineness of 98% passes through 40 meshes, the moisture content is less than or equal to 1%, the glass transition temperature is 54 ℃, and the thermal decomposition temperature is 268 ℃.
In certain embodiments of the present invention, the flame retardant is one of a silicon-containing halogen-free flame retardant, a phosphorus-containing halogen-free flame retardant, or a phosphorus-containing, silicon-containing halogen-free flame retardant.
In certain embodiments of the present invention, the phosphorus-containing halogen-free flame retardant is any one of phosphate ester, phosphite ester, dimethyl methylphosphonate, dimethyl ethylphosphate, dimethyl N, N-bis (2-hydroxyethyl) aminomethylphosphate, dimethyl polyacid, tris (2-chloropropyl) phosphate, isopropylated triphenyl phosphate, ammonium polyphosphate, hexachlorocyclotriphosphazene.
In some embodiments of the present invention, the combined toner is a mixed toner of any two of lithopone, zinc oxide, and titanium dioxide, and the compounding ratio between the two is 1: 2-1, preferably 1: 1.
the invention also provides a preparation method of the stress cracking resistant photodiffusion flame retardant polycarbonate, which comprises the following steps:
(1) according to a material formula, the material comprises the following components in percentage by mass: 95% -99% of Polycarbonate (PC); 0.1 to 1 percent of atomizing agent; 0.1 to 1 percent of antioxidant; 1 to 5 percent of toughening agent; 0.01 to 0.1 percent of flame retardant; 0.001% -0.05% of the combined toner, and accurately weighing each component until the weight is 0.001 KG; putting the PC into a drying oven, and drying for 2-4 hours at 120 ℃;
(2) pouring the dried PC, various auxiliary agents such as an atomizing agent, an antioxidant, a toughening agent, a flame retardant and the like and toner into a stirring barrel, premixing the materials for 3-5 min, and uniformly mixing to obtain an initial mixture;
(3) the initial mixed material is put into a main feeding hopper of a double-screw extruder, the mixed material is conveyed through the self gravity and a screw rod of a first section feeding area of the extruder, and is subjected to heating melting and extrusion granulation by a heating cylinder body and the shearing of the screw rod to finally obtain the stress cracking resistant light diffusion flame retardant polycarbonate; the processing temperature of the double-screw extruder body is controlled to be 220-260 ℃, the double-screw extruder is heated in 10 sections, and the temperature of each section is as follows: the feeding section and the compression section are 100-220 ℃, the melting section and the metering section are 220 ℃, the die head is 260 ℃, and the rotating speed of a main machine of the die head is 220-250 r/min.
Compared with the prior art, the invention has the following advantages:
(1) the stress cracking resistant photodiffusion flame-retardant polycarbonate prepared by the invention effectively improves the stress cracking of the material, and particularly effectively improves the production quality and efficiency of large wall thickness product materials.
(2) The stress cracking resistant photodiffusion flame-retardant polycarbonate prepared by the invention has excellent photodiffusion, the flame-retardant grade can reach V-0 grade, and the actual use requirement of the product can be met.
(3) The preparation process of the stress cracking resistant photodiffusion flame-retardant polycarbonate material provided by the invention is simple, is suitable for industrial production, and has a wide application prospect.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present disclosure is set forth in order to provide a more thorough understanding thereof. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to better embody the performance of the present invention, the following tests were specifically performed, and several other formulations were developed to facilitate comparative test analysis, wherein the PC resin a in the formulation was low viscosity IR 1900, the PC resin B was medium viscosity IR2200, and the PC resin C was high viscosity IR 2500, and the test results are shown in table 1 below.
TABLE 1
It can be determined from the performance comparison test in table 1 that, compared with comparative examples 1 and 2, the stress cracking resistant photodiffusion flame retardant polycarbonate material prepared in examples 1-2 of the present invention has excellent stress cracking resistance after using IR 1900 as the PC base material, which indicates that the PC base material plays a critical role in stress cracking resistance of the material, and the PC base material with higher viscosity and better performance makes the molding material have more excellent performance. Compared with the comparative example 3, after a proper amount of the atomizing agent is added, the balance of haze, light transmittance and impact strength can be well solved. The combination and matching of the atomizing agent and the toner increase the light scattering and projection, effectively improve the defect of poor light diffusivity of the PC base material, and can not reduce the impact strength of the material. Compared with the comparative example 4, after a proper amount of phosphorus-containing halogen-free flame retardant is added, the flame retardant can be decomposed to produce substances such as metaphosphoric acid and the like to protect the base material during combustion, and a free radical trapping agent can be generated to trap free radicals in the air, so that the combustion chain reaction is terminated, and the flame retardant effect is exerted in a condensed phase synthesis gas phase.
In addition, the stress cracking resistant photodiffusion flame retardant polycarbonate material prepared in the embodiments 1-2 has a mass melt index of about 19.8-20.6g/10min, a flexural modulus of over 2100MPa, excellent mechanical property related indexes, good mechanical properties and good moldability. The antioxidant used in the invention can not only react with free radicals generated in high molecular polymers, but also achieve the purpose of antioxidation by preventing or delaying the free radicals generated in the oxidation process of the high polymers. The invention is different from other inventions for grafting modification of PC resin, and from the practical application requirements of products, the invention can obtain excellent anti-cracking, flame-retardant and light diffusion effects by optimizing PC base materials, controlling the proportion of materials in the formula or adjusting the proportion of an atomizing agent and toner on the basis of the formula shown in Table 1.
The above formulations are merely examples provided for clarity of illustration and are not intended to be limiting of the embodiments. It will be apparent to those skilled in the art that other variations and modifications may be made in the foregoing disclosure without departing from the spirit or essential characteristics of the invention, and it is intended that all such modifications and variations be considered as within the scope of the invention.
Claims (10)
1. The stress cracking resistant photodiffusion flame retardant polycarbonate is characterized by comprising the following components in percentage by mass: 95% -99% of Polycarbonate (PC); 0.1 to 1 percent of atomizing agent; 0.1 to 1 percent of antioxidant; 1 to 5 percent of toughening agent; 0.01 to 0.1 percent of flame retardant; 0.001 to 0.05 percent of composite toner.
2. The stress crack resistant photodiffusion flame retardant polycarbonate of claim 1, wherein: the polycarbonate has a density of 1 to 2g/cm3The mass melt index under the test conditions of 300 ℃ and 1.2kg is 10-20g/10min, and the mass melt index under the test conditions of UL-94 and 1.47mm is V-2 grade.
3. The stress crack resistant photodiffusion flame retardant polycarbonate of claim 1, wherein: the atomization agent is one of an organic silicon light diffusion agent or an acrylic acid light diffusion agent, the refractive index is 1.41-1.43, and the average particle size is 1-2 mu m.
4. The stress crack resistant photodiffusion flame retardant polycarbonate of claim 1, wherein: the antioxidant is a hindered phenol main antioxidant and a phosphite ester auxiliary antioxidant, and specifically is a compound of a tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester main antioxidant and a [ bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite ] auxiliary antioxidant, wherein the compound ratio of the two is 1: 2 to 1.
5. The stress crack resistant photodiffusion flame retardant polycarbonate of claim 1, wherein: the toughening agent is one or the combination of an ACR toughening agent and a POE toughening agent.
6. The stress crack resistant photodiffusion flame retardant polycarbonate of claim 5, wherein: the toughening agent is an ACR401 toughening agent which takes methyl methacrylate-ethyl acrylate copolymer as a shell and rubber elastomer formed by butyl acrylate crosslinking as a core, the intrinsic viscosity is 0.5-1, the fineness is 98 percent and passes through 40 meshes, the moisture content is less than or equal to 1 percent, the glass transition temperature is 54 ℃, and the thermal decomposition temperature is 268 ℃.
7. The stress crack resistant photodiffusion flame retardant polycarbonate of claim 1, wherein: the flame retardant is one of silicon-containing halogen-free flame retardant, phosphorus-containing halogen-free flame retardant or phosphorus-containing and silicon-containing halogen-free flame retardant.
8. The stress crack resistant photodiffusion flame retardant polycarbonate of claim 7, wherein: the phosphorus-containing halogen-free flame retardant is any one of phosphate, phosphite ester, dimethyl methylphosphonate, dimethyl ethyl phosphate, dimethyl N, N-bis (2-hydroxyethyl) aminomethyl phosphate, dimethyl polyacid, tris (2-chloropropyl) phosphate, isopropylated triphenyl phosphate, ammonium polyphosphate and hexachlorocyclotriphosphazene.
9. The stress crack resistant photodiffusion flame retardant polycarbonate of claim 1, wherein: the composite toner is a mixed toner of any two of lithopone, zinc oxide and titanium dioxide, and the compounding ratio of the two is 1: 2 to 1.
10. The preparation method of the stress cracking resistant photodiffusion flame retardant polycarbonate applied to any one of claims 1-9, is characterized by comprising the following steps:
(1) according to a material formula, the material comprises the following components in percentage by mass: 95% -99% of Polycarbonate (PC); 0.1 to 1 percent of atomizing agent; 0.1 to 1 percent of antioxidant; 1 to 5 percent of toughening agent; 0.01 to 0.1 percent of flame retardant; 0.001% -0.05% of the combined toner, and accurately weighing each component until the weight is 0.001 KG; putting the PC into a drying oven, and drying for 2-4 hours at 120 ℃;
(2) pouring the dried PC, various auxiliary agents such as an atomizing agent, an antioxidant, a toughening agent, a flame retardant and the like and toner into a stirring barrel, premixing the materials for 3-5 min, and uniformly mixing to obtain an initial mixture;
(3) the initial mixed material is put into a main feeding hopper of a double-screw extruder, the mixed material is conveyed through the self gravity and a screw rod of a first section feeding area of the extruder, and is subjected to heating melting and extrusion granulation by a heating cylinder body and the shearing of the screw rod to finally obtain the stress cracking resistant light diffusion flame retardant polycarbonate; the processing temperature of the double-screw extruder body is controlled to be 220-260 ℃, the double-screw extruder is heated in 10 sections, and the temperature of each section is as follows: the feeding section and the compression section are 100-220 ℃, the melting section and the metering section are 220 ℃, the die head is 260 ℃, and the rotating speed of a main machine of the die head is 220-250 r/min.
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