CN114806128A - Low-temperature-resistant stress-cracking-resistant flame-retardant PC material and preparation method thereof - Google Patents
Low-temperature-resistant stress-cracking-resistant flame-retardant PC material and preparation method thereof Download PDFInfo
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- CN114806128A CN114806128A CN202210512617.6A CN202210512617A CN114806128A CN 114806128 A CN114806128 A CN 114806128A CN 202210512617 A CN202210512617 A CN 202210512617A CN 114806128 A CN114806128 A CN 114806128A
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- flame retardant
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 56
- 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 52
- 239000000463 material Substances 0.000 title claims abstract description 44
- 238000005336 cracking Methods 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 239000012745 toughening agent Substances 0.000 claims abstract description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 6
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 6
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims abstract description 4
- 239000000314 lubricant Substances 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims description 12
- 229920000106 Liquid crystal polymer Polymers 0.000 claims description 9
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 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 4
- 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 4
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims 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 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 150000002367 halogens Chemical class 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 239000003607 modifier Substances 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims 1
- 239000004974 Thermotropic liquid crystal Substances 0.000 claims 1
- 239000000654 additive Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 229920003055 poly(ester-imide) Polymers 0.000 claims 1
- 229920002647 polyamide Polymers 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C08L83/00—Compositions 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; Compositions of derivatives of such polymers
- C08L83/10—Block- or graft-copolymers containing polysiloxane sequences
-
- 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
Abstract
The invention relates to the technical field of flame-retardant materials, in particular to an ultralow temperature resistant stress cracking resistant flame-retardant PC material and a preparation method thereof, wherein the ultralow temperature resistant stress cracking resistant flame-retardant PC material comprises the following components: PC, LCP, low-temperature resistant flame retardant, anti-dripping agent, low-temperature resistant toughening agent, antioxidant, anti-UV agent and lubricant. The preparation method of the flame-retardant PC material is simple, and the low-temperature impact resistance, stress cracking resistance, temperature resistance, electrical property and flame retardance of PC are improved by adding the LCP material; the addition of the auxiliary agent can be reduced and the mechanical property of the product can be improved by adopting the auxiliary agent of a compound system; by adopting the organic silicon flame retardant and the silicon toughening agent, the flame-retardant PC material has higher thermal stability and excellent stress resistance under the impact at the temperature of-60 ℃.
Description
Technical Field
The invention relates to the technical field of flame-retardant materials, in particular to an ultralow-temperature-resistant stress cracking-resistant flame-retardant PC material and a preparation method thereof.
Background
Under the rapid development of world science and technology, the national cooperation is in the key point of infrastructure core technology and application in the fields of new energy automobiles, 5G, aerospace, medical treatment, military industry and the like, and as the product needs to be used in a severe environment, the matched high polymer material has wide application prospect, but the performance needs to meet strict requirements.
The PC material is usually used in the existing flame retardant material, and is an excellent engineering plastic with excellent mechanical property, electrical property, fatigue resistance, temperature resistance (-40 ℃ to 135 ℃), high transparency and free dyeing property, but the PC material is not resistant to ultraviolet light and strong base, has poor hydrolysis resistance and stability, is sensitive to notches, is easy to stress crack and has poor low-temperature toughness. LCP as a liquid crystal polymer has excellent self-reinforcement, temperature resistance, weather resistance, hydrolysis resistance, chemical corrosion resistance, electrical property and UL 94V-0 level flame retardance, and can be used for improving the performance of the flame-retardant PC material.
The flame-retardant PC material is widely applied to the fields of automobiles, medical treatment, aerospace, sports, electronics, packaging materials and the like, but the flame-retardant PC material on the market at present usually adopts a sulfonate flame retardant, has defects in the aspects of hydrolysis, thermal stability and stress cracking resistance, can only meet the requirements of tolerance and flame retardance at the temperature of-40 ℃, and cannot meet the requirements of mechanical properties, heat resistance and flame retardance of the material at lower temperature.
Disclosure of Invention
The invention aims to provide an ultralow temperature resistant, stress cracking resistant and flame retardant PC material and a preparation method thereof, so as to solve the problems in the background art.
The invention is realized by the following technical scheme:
an ultralow temperature-resistant stress cracking-resistant flame-retardant PC material comprises the following components in parts by weight:
PC: 80-95 parts of a modifier;
LCP: 2-5 parts;
a toughening agent: 2-6 parts;
flame retardant: 1-5 parts;
anti-dripping agent: 0.2-1 part;
auxiliary agent: 0.5-3 parts.
Preferably, the LCP is selected from polyamide-type and/or polyesterimide-type thermotropic liquid crystalline polymeric materials.
Preferably, the toughening agent is selected from at least one of MBS, organosilicon or EMA system.
Preferably, the flame retardant comprises a halogen flame retardant and a halogen-free flame retardant, and the halogen-free flame retardant comprises a silicon-based flame retardant.
Preferably, the anti-dripping agent is coated PTFE anti-dripping agent, wherein the content of PTFE is 50%.
Preferably, the auxiliaries include an antioxidant, a UV-resistant agent and a lubricant.
Preferably, the antioxidant is a compound of hindered phenol antioxidant 1076 and phosphite antioxidant 168, and the mass ratio of the hindered phenol antioxidant 1076 to the phosphite antioxidant 168 is 1: 2.
as a further scheme of the invention, the PC is synthesized by phosgenation, the PC is selected from common grade PC and/or siloxane copolymerization PC, and the melt index of the PC is 10-20 g/10 min.
The invention also provides a preparation method of the ultralow temperature resistant stress cracking resistant flame-retardant PC material, which comprises the following steps:
(1) drying the raw materials of the components, weighing the dried raw materials such as PC and the like according to the weight ratio, adding the raw materials into a high-speed mixer, and uniformly mixing to obtain uniformly mixed raw materials;
(2) and (2) feeding the uniformly mixed raw materials obtained in the step (1) to a double-screw extruder, and carrying out melt blending extrusion, cooling and grain cutting to obtain the ultralow temperature resistant stress cracking resistant flame retardant PC material.
In the preparation method, the rotating speed of the double-screw extruder is set to be 500-600 r/min, and the processing temperature is set to be 240-280 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1. the flame-retardant PC material provided by the invention is low in production cost, simple in preparation method, free of special equipment and prepared only by a high-speed mixer and a double-screw extruder.
2. The LCP material is added, so that the low-temperature impact resistance, stress cracking resistance, temperature resistance, electrical property and flame retardant property of the PC can be improved.
3. The invention adopts the auxiliary agent of a compound system, can reduce the addition of the auxiliary agent and simultaneously improve the mechanical property of the product; by adopting the organic silicon flame retardant and the silicon toughening agent, the flame-retardant PC material has higher thermal stability and excellent stress resistance under the impact at the temperature of-60 ℃.
Detailed Description
The present invention will be further described with reference to the following examples. The preferred embodiments are not to be considered in all respects as exhaustive or limiting, the invention being limited only to the specific embodiments described. Unless otherwise specified, the methods in the examples are all routine methods for experiments, and the experimental materials used are readily available from commercial companies.
Examples 1-6 and comparative examples 1-4:
the invention provides a preparation method of an ultralow temperature resistant stress cracking resistant flame-retardant PC material, which specifically comprises the following steps:
(1) drying the raw materials of the components, weighing the dried PC resin, LCP, toughening agent, flame retardant, anti-dripping agent, antioxidant, anti-UV agent and lubricant according to the weight part ratio, putting the weighed materials into a high-speed mixer for mixing, and uniformly mixing the raw materials to obtain a premix;
(2) and (2) putting the premix obtained in the step (1) into a high-torque co-rotating twin-screw extruder from a main feeding port, performing melt blending extrusion by using the twin-screw extruder to obtain a composite raw material, performing water cooling to room temperature to obtain a cooled composite material, and granulating to obtain the target ultralow temperature resistant stress cracking resistant flame retardant PC material.
In the preparation method, the rotating speed of the high-torque co-rotating double-screw extruder is set to be 500-600 r/min, the current of a main machine is 65-75A, the main feeding rotating speed is 10-30 HZ, the temperatures of a first zone, a second zone and a third zone of the double-screw extruder are set to be 260 +/-10 ℃, the temperature of a fourth zone is set to be 245 +/-10 ℃, the temperatures of a fifth zone, a sixth zone and a seventh zone are set to be 240 +/-10 ℃, the temperatures of an eighth zone, a ninth zone and a tenth zone are set to be 245 +/-15 ℃, and the temperature of a machine head is set to be 250 +/-15 ℃.
The weight parts of the raw material components of examples 1 to 6 and comparative examples 1 to 4 are shown in Table 1.
Table 1:
the ultralow temperature stress cracking resistant flame-retardant PC materials prepared in examples 1-6 and comparative examples 1-4 were respectively tested according to standard tests, and the performance test results are shown in Table 2.
Table 2:
as can be seen by combining the tables 1 and 2, compared with the comparative examples 1 to 4, the ultralow temperature stress cracking resistance flame retardant PC materials prepared in the embodiments 1 to 6 of the invention have good mechanical properties in tensile strength test, elongation at break test, bending strength test, bending modulus test and impact test; the flame retardant test results show that the ultralow temperature resistant, stress cracking resistant and flame retardant PC materials prepared in examples 1-6 can reach V-0 level, and show excellent flame retardant performance; meanwhile, the results of the-60 ℃ notch impact strength test show that the examples 1-6 all meet the requirement that the-60 ℃ notch impact strength is more than or equal to 40kJ/m2, have the characteristic of ultralow temperature impact strength, have good impact strength at-40 ℃ compared with the existing flame-retardant PC material, and can be applied to special environment use requirements.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not to be considered in all respects as exhaustive or limiting, the invention being limited only to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The ultralow-temperature-resistant stress cracking-resistant flame-retardant PC material is characterized by comprising the following components in parts by weight:
PC: 80-95 parts of a modifier;
LCP: 2-5 parts;
a toughening agent: 2-6 parts;
flame retardant: 1-5 parts;
anti-dripping agent: 0.2-1 part;
auxiliary agent: 0.5-3 parts.
2. The ultra-low temperature resistant, stress crack resistant and flame retardant PC material of claim 1, wherein the LCP is selected from polyamide type and/or polyesterimide type thermotropic liquid crystal polymer materials.
3. The ultra-low temperature stress crack resistant flame retardant PC material of claim 1, wherein the toughening agent is at least one selected from MBS, organosilicon or EMA system.
4. The ultra-low temperature stress crack resistant flame retardant PC material as claimed in claim 1, wherein the flame retardant comprises a halogen flame retardant and a halogen-free flame retardant, and the halogen-free flame retardant comprises a silicon-based flame retardant.
5. The ultra-low temperature resistant, stress crack resistant and flame retardant PC material according to claim 1, wherein the anti-dripping agent is a coated PTFE anti-dripping agent, wherein the content of PTFE is 50%.
6. The ultra-low temperature resistant, stress crack resistant and flame retardant PC material of claim 1, wherein the additives comprise an antioxidant, a UV resistant agent and a lubricant.
7. The ultralow temperature stress cracking resistant flame-retardant PC material as claimed in claim 6, wherein the antioxidant is a compound of a hindered phenol antioxidant 1076 and a phosphite antioxidant 168, and the mass ratio of the hindered phenol antioxidant 1076 to the phosphite antioxidant 168 is 1: 2.
8. the ultra-low temperature stress crack resistance flame retardant PC material according to any one of claims 1 to 7, wherein the PC is selected from common grade PC and/or siloxane co-PC, and the melt index of the PC is 10-20 g/10 min.
9. The preparation method of the ultralow temperature stress cracking resistant flame-retardant PC material as claimed in claim 1, which is characterized by comprising the following steps: drying the raw materials of the components, weighing the raw materials of the components according to the weight ratio, adding the raw materials into a high-speed mixer, uniformly mixing, feeding the mixture into a double-screw extruder, and performing melt blending extrusion, cooling and grain cutting to obtain the ultralow temperature-resistant stress cracking-resistant flame-retardant PC material.
10. The preparation method of the ultralow temperature-resistant stress cracking-resistant flame-retardant PC material as claimed in claim 9, wherein the rotation speed of the twin-screw extruder is set to be 500-600 r/min, and the processing temperature is set to be 240-280 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210512617.6A CN114806128B (en) | 2022-05-10 | 2022-05-10 | Low-temperature-resistant stress-cracking-resistant flame-retardant PC material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210512617.6A CN114806128B (en) | 2022-05-10 | 2022-05-10 | Low-temperature-resistant stress-cracking-resistant flame-retardant PC material and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114806128A true CN114806128A (en) | 2022-07-29 |
| CN114806128B CN114806128B (en) | 2024-02-09 |
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| CN202210512617.6A Active CN114806128B (en) | 2022-05-10 | 2022-05-10 | Low-temperature-resistant stress-cracking-resistant flame-retardant PC material and preparation method thereof |
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2022
- 2022-05-10 CN CN202210512617.6A patent/CN114806128B/en active Active
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| CN114806128B (en) | 2024-02-09 |
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