CN113773628A - Flame-retardant PC composition and preparation method thereof - Google Patents
Flame-retardant PC composition and preparation method thereof Download PDFInfo
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- CN113773628A CN113773628A CN202111040702.9A CN202111040702A CN113773628A CN 113773628 A CN113773628 A CN 113773628A CN 202111040702 A CN202111040702 A CN 202111040702A CN 113773628 A CN113773628 A CN 113773628A
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- 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 59
- 239000003063 flame retardant Substances 0.000 title claims abstract description 53
- 239000000203 mixture Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 14
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 claims abstract description 8
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 7
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 7
- 239000000314 lubricant Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical group CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 claims description 3
- 238000003490 calendering Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000007605 air drying Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- KBXJHRABGYYAFC-UHFFFAOYSA-N octaphenylsilsesquioxane Chemical compound O1[Si](O2)(C=3C=CC=CC=3)O[Si](O3)(C=4C=CC=CC=4)O[Si](O4)(C=5C=CC=CC=5)O[Si]1(C=1C=CC=CC=1)O[Si](O1)(C=5C=CC=CC=5)O[Si]2(C=2C=CC=CC=2)O[Si]3(C=2C=CC=CC=2)O[Si]41C1=CC=CC=C1 KBXJHRABGYYAFC-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000004513 sizing Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 2
- 230000009044 synergistic interaction Effects 0.000 abstract description 2
- 239000004417 polycarbonate Substances 0.000 description 38
- 230000000052 comparative effect Effects 0.000 description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 229920005668 polycarbonate resin Polymers 0.000 description 4
- 239000004431 polycarbonate resin Substances 0.000 description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- 241001330498 Corsia Species 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- UXUFTKZYJYGMGO-CMCWBKRRSA-N (2s,3s,4r,5r)-5-[6-amino-2-[2-[4-[3-(2-aminoethylamino)-3-oxopropyl]phenyl]ethylamino]purin-9-yl]-n-ethyl-3,4-dihydroxyoxolane-2-carboxamide Chemical compound O[C@@H]1[C@H](O)[C@@H](C(=O)NCC)O[C@H]1N1C2=NC(NCCC=3C=CC(CCC(=O)NCCN)=CC=3)=NC(N)=C2N=C1 UXUFTKZYJYGMGO-CMCWBKRRSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012747 synergistic agent Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/5399—Phosphorus bound to nitrogen
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a flame-retardant PC composition and a preparation method thereof, wherein the composition is prepared from the following components in parts by mass: 60-90 parts of PC resin, 10-30 parts of branched PC resin, 4-7 parts of flame retardant, 5-6 parts of flame retardant synergist, 0.1-0.5 part of antioxidant, 0.3 part of anti-dripping agent, 0.2-0.3 part of lubricant and 0.5-1 part of maleic anhydride grafted polyethylene wax. The invention provides a method for improving the heat resistance of a composition by using a branched PC resin, and the composition has flame retardance and heat resistance by using hexaphenoxycyclotriphosphazene as a flame retardant; the heat distortion temperature and the elongation of the material are improved by adding the components such as the fine talcum powder, the maleic anhydride grafted polyethylene wax and the like. According to the invention, through the synergistic interaction among the components, the problem of unstable flame retardance of the PC composition is solved, and the elongation of the material is obviously improved; and meanwhile, the composite material has good mechanical property and appearance, and has higher application and popularization values.
Description
Technical Field
The invention belongs to the field of polycarbonate material modification, and particularly relates to a flame-retardant PC composition and a preparation method thereof.
Background
Polycarbonate resin has structural particularity, excellent heat resistance, mechanical properties and electrical properties, and excellent properties such as high dimensional accuracy, has become the universal engineering plastic with the highest growth rate among five engineering plastics, and is widely used in various fields, such as electronic and electric appliances, automobiles, buildings, medical treatment, aerospace, optical lenses, food packaging and the like
The polycarbonate resin has certain flame retardance, the oxygen index is 25, but the polycarbonate resin cannot meet the field with higher flame retardance grade (flame retardance UL 94V 0), and the flame retardance of the polycarbonate resin needs to be improved; because the flame retardant has certain flame retardance, the flame retardant is relatively easy to improve, and the conventional flame retardant systems comprise a halogen system, a silicon system, a sulfonate system and a phosphorus system, and have advantages and disadvantages respectively. The halogen flame retardant is easy to corrode electrical equipment due to generation of corrosive gas by thermal cracking, and has the problem of environmental protection; the silicon-based flame retardant has low efficiency and is generally used as an auxiliary flame retardant; the sulfonate system promotes the decomposition of PC into carbon, and the long-term flame retardant stability of the PC is poor; phosphorus affects the heat resistance and hydrolysis resistance of PC. In the industry, the film flame-retardant PC is used for parts of OA equipment such as computers, notebook computers, tablet terminals, smart phones, mobile equipment, printers, copiers and the like, in order to ensure the thermal deformation performance and the environmental protection performance of materials, sulfonate or bromine system is generally adopted as a flame retardant, the attenuation of the flame retardant performance of sulfonate is serious along with time, and the bromine system is replaced along with the higher and higher requirements of people on environmental protection, so that the film flame-retardant PC with long-term stable flame retardance, no halogen and environmental protection is developed and can be widely applied.
Disclosure of Invention
The invention provides a flame-retardant PC composition and a preparation method thereof, aiming at solving the problems of flame retardance durability and easy toughness insufficiency of PC material films.
The purpose of the invention is realized by the following technical scheme:
the flame-retardant PC composition is prepared from the following components in parts by mass: 60-90 parts of PC resin (polycarbonate), 10-30 parts of branched PC resin, 4-7 parts of flame retardant, 3-6 parts of flame retardant synergist, 0.1-0.5 part of antioxidant, 0.3 part of anti-dripping agent, 0.2-0.3 part of lubricant and 0.5-1 part of maleic anhydride grafted polyethylene wax.
Preferably, the melt flow rate of the PC resin is 8-10g/10min under the conditions of a load of 1.2kg and a test temperature of 300 ℃; the viscosity average molecular weight of the PC resin is 30000-50000.
Preferably, the branched PC resin has a melt flow rate of 8-10g/10min under the conditions of a load of 1.2kg and a test temperature of 320 ℃; the thermal deformation temperature of the branched PC resin is 155-160 ℃ under the test conditions that the load is 1.8Mpa and the heating rate is 50 ℃/h.
Preferably, the flame retardant is hexaphenoxycyclotriphosphazene.
Preferably, the flame-retardant synergist is a mixture consisting of organic silicon and fine talcum powder, the organic silicon is hydroxyl-terminated phenyl silsesquioxane, and the particle size of the fine talcum powder is 5000-7000 meshes. Further preferably, the mass ratio of the organosilicon to the fine talcum powder is 1: 5.
Preferably, the antioxidant is a mixture of antioxidant 1076 and antioxidant 168. More preferably, the mass ratio of the antioxidant 1076 to the antioxidant 168 is 1: 2.
Preferably, the anti-dripping agent is a modified polytetrafluoroethylene anti-dripping agent SN-3300; the lubricant is pentaerythritol stearate (PETS).
The invention also discloses a preparation method of the flame-retardant PC composition, which comprises the following steps:
(1) weighing the branched PC resin, the flame retardant synergist, the antioxidant, the anti-dripping agent, the lubricant and the maleic anhydride grafted polyethylene wax according to the proportion, and then uniformly mixing the components to obtain premixed powder;
(2) respectively adding the PC resin and the premixed powder into a double-screw extruder through independent weightlessness weighers, controlling the temperature of each section of the extruder at 250-260 ℃, and controlling the length-diameter ratio of a screw to be 36: 1, controlling the rotating speed of a screw at 400-.
(3) Putting the flame-retardant PC composition subjected to vacuum drying into an extruder, melting, extruding through a T-shaped die, calendering by three rollers, shaping, and drawing at a certain speed to form a film.
Compared with the prior art, the invention has the beneficial effects that:
in the flame-retardant PC composition provided by the invention, the branched PC resin has higher heat distortion temperature and can improve the heat resistance of the material, but the addition amount of the branched PC resin is controlled within a proper range, and if the branched PC resin is excessively added, the elongation at break of the material is influenced; the hexaphenoxy cyclotriphosphazene is used as a flame retardant, and the structure of the hexaphenoxy cyclotriphosphazene contains six benzene rings, so that the hexaphenoxy cyclotriphosphazene has a higher melting point and has less influence on the heat resistance of the polyurethane resin; the flame-retardant synergistic agent is a mixture consisting of organic silicon and fine talcum powder, wherein the fine talcum powder can increase filling and improve the thermal deformation temperature of the material; in addition, the maleic anhydride grafted polyethylene wax is added, so that all components in the composition can be fully dispersed, the compatibility among the components can be improved, and meanwhile, the molecular chain of PC can be slightly crosslinked, and the effect of improving the elongation of the material can be achieved. According to the invention, through the synergistic interaction among the components, the problem of unstable flame retardance of the PC composition is solved, and the elongation of the material is obviously improved; and meanwhile, the composite material has good mechanical property and appearance, and has higher application and popularization values.
Detailed Description
The present invention will be further described with reference to the following examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. 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.
The types and suppliers of reagents used in this example were as follows:
the PC resin is 2400 made of Corsia Polymer (China) Co., Ltd;
the branched PC resin is APEC 1803 of Corsia polymer (China) Limited;
the organosilicon is FCA-107 of Dow Corning company;
the fine talcum powder is M05SLC of MONDO;
the reagents are provided only for illustrating the sources and components of the reagents used in the experiments of the present invention, so as to be fully disclosed, and do not indicate that the present invention cannot be realized by using other reagents of the same type or other reagents supplied by other suppliers.
A method of preparing a flame retardant PC composition comprising the steps of:
(1) weighing the components according to the material ratio in the table 1, and uniformly mixing all the components except the PC resin to obtain premixed powder;
(2) respectively passing the PC resin and the premixed powder through separate weightlessness weighers, and simultaneously adding into a double-screw extruder, wherein the temperatures of all sections of the extruder are respectively 200 ℃, 250 ℃, 260 ℃, 250 ℃ and 260 ℃; the length-diameter ratio of the screw is 36: 1, controlling the rotating speed of a screw at 400r/min, and after materials are melted in the screw, extruding, cooling, air-drying and granulating to obtain the flame-retardant PC composition.
(3) Putting the flame-retardant PC composition subjected to vacuum drying into an extruder, melting, extruding through a T-shaped die, calendering by three rollers, shaping, and drawing to form a film.
TABLE 1 raw material proportioning relation table for each example and comparative example
The performance of the products prepared in the above examples and comparative examples is tested, and the test results are shown in table 2 below, wherein: the melt flow rate is detected according to the standard ISO 1133, the test load is 1.2kg, and the test temperature is 300 ℃; the elongation at break is determined according to standard ISO 527, the tensile rate being 50 mm/min; the flame retardant property is tested according to the flame retardant rating standard of UL94, and the thickness of a sample is 0.4 mm; the heat distortion temperature is measured according to the standard ISO 75, and the load is 0.45 MPa.
TABLE 2 results of performance test of products obtained in examples and comparative examples
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Example 1 | Example 2 | Example 3 | |
| Melt flow Rate (g/10min) | 10 | 10 | 12 | 12 | 10 | 13 | 10 |
| Elongation at Break (%) | 120 | 100 | 60 | 60 | 100 | 100 | 100 |
| Flame retardant Property (0.4mm, UL94) | V2 | V1 | V0 | V2 | V0 | V0 | V0 |
| Heat distortion temperature (. degree. C.) | 125 | 128 | 128 | 125 | 132 | 132 | 135 |
As can be seen from the comparison of the results of comparative example 1 and example 1, the PC composition apparently did not drip easily when the fine talc powder was introduced; from a comparison of the results of comparative example 2 and example 1, it can be seen that when the amount of the branched PC resin added is too high, the elongation at break of the resulting product is significantly reduced; as can be seen from the comparison of the results of comparative example 3 and example 1, when maleic anhydride-grafted polyethylene wax was introduced, the heat resistance of the material obtained in example 1 was improved, and the elongation and the melt index were slightly decreased; from comparative examples 1 to 4, it can be seen that the combination of the productivities obtained in example 1 is the best by using fine talc powder and maleic anhydride-grafted polyethylene wax together and controlling the amount of the branched PC resin within a proper range.
Claims (10)
1. A flame retardant PC composition characterized by: the adhesive is prepared from the following components in parts by mass: 60-90 parts of PC resin, 10-30 parts of branched PC resin, 4-7 parts of flame retardant, 5-6 parts of flame retardant synergist, 0.1-0.5 part of antioxidant, 0.3 part of anti-dripping agent, 0.2-0.3 part of lubricant and 0.5-1 part of maleic anhydride grafted polyethylene wax.
2. The flame retardant PC composition of claim 1, wherein: the melt flow rate of the PC resin is 8-10g/10min under the conditions of 1.2kg of load and 300 ℃ of test temperature; the viscosity average molecular weight of the PC resin is 30000-50000.
3. The flame retardant PC composition of claim 1, wherein: the melt flow rate of the branched PC resin is 8-10g/10min under the conditions of 1.2kg of load and 320 ℃ of test temperature; the thermal deformation temperature of the branched PC resin is 155-160 ℃ under the test conditions that the load is 1.8Mpa and the heating rate is 50 ℃/h.
4. The flame retardant PC composition of claim 1, wherein: the flame retardant is hexaphenoxycyclotriphosphazene.
5. The flame retardant PC composition of claim 1, wherein: the flame-retardant synergist is a mixture consisting of organic silicon and fine talcum powder; the organic silicon is hydroxyl-terminated phenyl silsesquioxane, and the particle size of the fine talcum powder is 5000-7000 meshes.
6. The flame retardant PC composition of claim 1, wherein: the antioxidant is a mixture consisting of an antioxidant 1076 and an antioxidant 168.
7. The flame retardant PC composition of claim 1, wherein: the anti-dripping agent is modified polytetrafluoroethylene anti-dripping agent SN-3300.
8. The flame retardant PC composition of claim 1, wherein: the lubricant is pentaerythritol stearate.
9. The method of making a flame retardant PC composition according to any of claims 1-8, characterized in that: the method comprises the following steps:
(1) weighing the branched PC resin, the flame retardant synergist, the antioxidant, the anti-dripping agent, the lubricant and the auxiliary additive according to the proportion, and uniformly mixing to obtain premixed powder;
(2) simultaneously adding the PC resin and the premixed powder into a double-screw extruder, controlling the temperature of each section of the extruder at 250 ℃ and 260 ℃, and controlling the length-diameter ratio of a screw to be 36: 1, controlling the rotating speed of the screw at 400-450r/min, and after the materials are melted in the screw, extruding, cooling, air-drying and granulating to obtain the flame-retardant PC composition.
10. The method of preparing a flame retardant PC composition according to claim 9, wherein: the method also comprises a drawing film forming step, and the specific operations are as follows: putting the flame-retardant PC composition subjected to vacuum drying into an extruder, melting, extruding through a T-shaped die, and drawing to form a film after three-roller calendering and sizing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114181508A (en) * | 2021-12-14 | 2022-03-15 | 安庆会通新材料有限公司 | Ultrathin flame-retardant PC (polycarbonate) film material and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418116A (en) * | 2007-10-22 | 2009-04-29 | 广东银禧科技股份有限公司 | Heat conductive polycarbonate composite and preparation method thereof |
| CN104684973A (en) * | 2012-09-14 | 2015-06-03 | 沙特基础全球技术有限公司 | Flame-resistant polycarbonate film |
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Application publication date: 20211210 |