CN114854168B - Heat-resistant flame-retardant ABS composition and preparation method thereof - Google Patents
Heat-resistant flame-retardant ABS composition and preparation method thereof Download PDFInfo
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- CN114854168B CN114854168B CN202210636969.2A CN202210636969A CN114854168B CN 114854168 B CN114854168 B CN 114854168B CN 202210636969 A CN202210636969 A CN 202210636969A CN 114854168 B CN114854168 B CN 114854168B
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- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
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Abstract
The invention relates to the technical field of high polymer materials, in particular to a heat-resistant flame-retardant ABS composition and a preparation method thereof, wherein the heat-resistant flame-retardant ABS composition comprises the following raw materials in parts by weight: 40-60 parts of ABS resin, 1-5 parts of compatilizer, 5-10 parts of flame retardant, 1-5 parts of thermoplastic elastomer, 1-5 parts of heat-resistant modifier, 4-8 parts of toughening modifier, 1-3 parts of lubricant, 1-5 parts of coupling agent and 3-7 parts of graphite whisker. The heat-resistant flame-retardant ABS composition has high flame-retardant effect and stability, the thermal deformation temperature can reach more than 100 ℃, the flame-retardant effect and stability are better on the premise of meeting the mechanical properties, the mechanical properties of the heat-resistant flame-retardant ABS composition are kept in the best balance, the application range is wider, the cost is lower, and the process is simple, so that the heat-resistant flame-retardant ABS composition is convenient to popularize.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a heat-resistant flame-retardant ABS composition and a preparation method thereof.
Background
The ABS resin is a terpolymer composed of styrene, butadiene and acrylonitrile, integrates the high fluidity of styrene, the rubber toughness of butadiene and the chemical resistance of acrylonitrile, has excellent processability, low temperature resistance, electrical insulation performance, chemical corrosion resistance, high gloss and excellent electroplating performance, has the excellent characteristics of good creep resistance, high dimensional stability, small molding shrinkage rate and the like, and is widely applied to the fields of military industry, automobiles, electronic appliances and the like. However, on one hand, the oxygen index of the ABS resin is only 18, and the ABS resin belongs to inflammable materials; on the other hand, ABS resins themselves have low heat resistance and generally have a heat distortion temperature of 82-84 ℃ (ASTM D648,1.82 MPa). Therefore, when the flame-retardant heat-resistant modified flame-retardant electronic equipment is used for electronic equipment, so that the use requirements of safety and fire prevention are met.
ABS resin is one of five synthetic resins, has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical property, has the characteristics of easy processing, stable product size, good surface glossiness and the like, is easy to coat and color, can be used for secondary processing such as surface spraying metal, electroplating, welding, hot pressing, bonding and the like, and is widely applied to industrial fields such as machinery, automobiles, electronic appliances, instruments and meters, textile, building and the like, and extremely wide application range of thermoplastic engineering plastics. However, in some specific cases, the flame retardancy of ABS resins appears to be relatively insufficient.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the heat-resistant flame-retardant ABS composition which has high flame retardant effect and stability, the thermal deformation temperature can reach more than 100 ℃, the flame retardant effect and stability are better on the premise of meeting the mechanical properties, the mechanical properties of the heat-resistant flame-retardant ABS composition are kept in the best balance, the application range is wider, the cost is lower, and the heat-resistant flame-retardant ABS composition is simple in process, so that the heat-resistant flame-retardant ABS composition is convenient to popularize.
The invention aims to provide a preparation method of a heat-resistant flame-retardant ABS composition, which is simple, convenient to operate and control, high in quality of produced products, low in cost, beneficial to industrial production and capable of effectively overcoming the defects of the conventional antibacterial coating.
The aim of the invention is achieved by the following technical scheme: the heat-resistant flame-retardant ABS composition comprises the following raw materials in parts by weight: 40-60 parts of ABS resin, 1-5 parts of compatilizer, 5-10 parts of flame retardant, 1-5 parts of thermoplastic elastomer, 1-5 parts of heat-resistant modifier, 4-8 parts of toughening modifier, 1-3 parts of lubricant, 1-5 parts of coupling agent and 3-7 parts of graphite whisker; the lubricant is pentaerythritol stearate.
The heat-resistant flame-retardant ABS composition has high flame-retardant effect and stability, the thermal deformation temperature can reach more than 100 ℃, the flame-retardant effect and stability are better on the premise of meeting the mechanical properties, and each mechanical property is kept in the best balance, so that the heat-resistant flame-retardant ABS composition has the advantages of wider application range, lower cost and simple process, and is convenient to popularize. Wherein the ABS composition has soft characteristic and excellent stress whitening resistance by adding the thermoplastic elastomer and the toughening modifier; the added graphite whisker has good heat resistance and excellent flame resistance, and can further assist in improving the flame retardant effect of the composition; in addition, the specific types of the added flame retardant can reduce the influence of the flame retardant on the fatigue resistance and the low-temperature bending retention rate of the material, and obviously improve the flame retardant property.
Preferably, the heat-resistant modifier comprises the following raw materials in parts by weight: 5-10 parts of polydiacid glycol ester, 10-15 parts of polymethyl methacrylate, 4-8 parts of graphite phase carbon nitride, 5-10 parts of isopropanol, 0.6-1.0 part of acetic acid, 0.2-0.4 part of chitosan, 4-8 parts of polystyrene microsphere and 1-3 parts of polybutadiene.
Preferably, the heat-resistant modifier is prepared by the following method:
s1, adding graphite-phase carbon nitride into isopropanol according to parts by weight, performing ultrasonic treatment at 6000-10000Hz for 4-8min, adding acetic acid and chitosan into the isopropanol, and taking an upper suspension after ultrasonic treatment to obtain graphite-phase carbon nitride emulsion for later use;
s2, adding the polydiacid glycol ester and the polymethyl methacrylate into the graphite phase carbon nitride emulsion obtained in the step S1, and stirring at the speed of 200-400r/min for 20-40min to obtain a shell layer material for later use;
s3, mixing the polystyrene microsphere and the polybutadiene, adding the mixture into the shell material obtained in the step S2, centrifuging at a speed of 7000-80000r/min for 8-16min, washing, performing ultrasonic treatment, drying and grinding to obtain the heat-resistant modifier.
The heat-resistant modifier is prepared by adopting the raw materials and the preparation method, the prepared heat-resistant modifier is of a core-shell structure, the polydiacid glycol ester, the polymethyl methacrylate and the graphite phase carbon nitride emulsion are used as shell materials, and the polystyrene microsphere and the polybutadiene are used as cores, so that the heat-resistant modifier has the effects of high strength and high heat resistance, is beneficial to the dispersibility in ABS resin, overcomes the defects of poor dispersibility, poor effect and the like of a flame-retardant material in the traditional method, improves the flame-retardant property of the ABS composition, and has the advantages of simple and flexible operation, good stability, lower cost and low operation condition requirement, and is beneficial to mass production.
Preferably, the compatilizer is at least one of high rubber powder or maleic anhydride.
The thermoplastic elastomer adopted in the invention has good flexibility, high elasticity and low temperature performance, and a certain amount of compatilizer is added to be used as the toughening agent of the ABS resin.
Preferably, the flame retardant is at least one of brominated polystyrene, decabromodiphenyl ethane, decabromodiphenyl ether and triphenyl phosphate. More preferably, the flame retardant is a mixture of brominated polystyrene, decabromodiphenyl ethane and triphenyl phosphate in a weight ratio of 0.8-1.2:0.6-1.0:0.3-0.7.
The flame retardant is prepared from the raw materials according to a specific proportion, so that the influence of the flame retardant on the fatigue resistance and the low-temperature bending retention rate of the material can be reduced in cooperation with the respective advantages, the dispersion problem of the heat-resistant modifier in the ABS resin is further improved, and the problem of sensitivity of the flame retardant to processing temperature is solved.
Preferably, the thermoplastic elastomer is at least one of polyurethane thermoplastic elastomer and polyether ester thermoplastic elastomer.
Preferably, the toughening modifier is at least one of nitrile rubber and styrene butadiene rubber. More preferably, the toughening modifier is a mixture composed of nitrile rubber and styrene-butadiene rubber according to the weight ratio of 0.8-1.2:0.6-1.0.
The toughening modifier adopted in the invention can increase the flexibility of the ABS composition and improve the comprehensive performance of the ABS composition.
Preferably, the coupling agent is at least one of a silane coupling agent, a titanate coupling agent, an aluminate coupling agent and a zirconate coupling agent.
The invention also provides a preparation method of the heat-resistant flame-retardant ABS composition, which is prepared by the following steps:
according to the weight portions, the ABS resin, the compatilizer, the flame retardant, the thermoplastic elastomer, the heat-resistant modifier, the toughening modifier, the lubricant and the coupling agent are mixed and then added into a main feeding port of an extruder, the temperature of a first area is 160-180 ℃, the temperature of a second area is 175-185 ℃, the temperature of a third area is 175-185 ℃, the temperature of a fourth area is 165-175 ℃, the temperature of a fifth area is 155-165 ℃, the mixture is extruded, and meanwhile, graphite whiskers are added into a first exhaust hole or a side feeding port of the extruder, and the mixture is subjected to melt granulation to obtain the heat-resistant flame-retardant ABS composition.
The heat-resistant flame-retardant ABS composition is prepared by the method, has high flame-retardant effect and stability, the thermal deformation temperature can reach more than 100 ℃, the flame-retardant effect and stability are better on the premise of meeting the mechanical properties, the mechanical properties of the heat-resistant flame-retardant ABS composition are kept in the best balance, the application range is wider, the cost is lower, and the process is simple, so that the heat-resistant flame-retardant ABS composition is convenient to popularize, the preparation method is simple, the operation control is convenient, the quality of the produced product is high, the cost is low, the industrial production is facilitated, and the defects of the conventional antibacterial paint can be effectively overcome.
The invention has the beneficial effects that: the heat-resistant flame-retardant ABS composition has high flame-retardant effect and stability, the thermal deformation temperature can reach more than 100 ℃, the flame-retardant effect and stability are better on the premise of meeting the mechanical properties, the mechanical properties of the heat-resistant flame-retardant ABS composition are kept in the best balance, the application range is wider, the cost is lower, and the process is simple, so that the heat-resistant flame-retardant ABS composition is convenient to popularize.
The preparation method of the heat-resistant flame-retardant ABS composition is simple, convenient to operate and control, high in quality of produced products, low in cost, beneficial to industrial production, and capable of effectively overcoming the defects of the conventional antibacterial coating.
Detailed Description
The invention will be further illustrated by the following examples, which are not intended to limit the scope of the invention, in order to facilitate the understanding of those skilled in the art.
Example 1
The heat-resistant flame-retardant ABS composition comprises the following raw materials in parts by weight: 40 parts of ABS resin, 1 part of compatilizer, 5 parts of flame retardant, 1 part of thermoplastic elastomer, 1 part of heat-resistant modifier, 4 parts of toughening modifier, 1 part of lubricant, 1 part of coupling agent and 3 parts of graphite whisker; the lubricant is pentaerythritol stearate.
The heat-resistant modifier comprises the following raw materials in parts by weight: 5 parts of polydiacid glycol ester, 10 parts of polymethyl methacrylate, 4 parts of graphite phase carbon nitride, 5 parts of isopropanol, 0.6 part of acetic acid, 0.2 part of chitosan, 4 parts of polystyrene microsphere and 1 part of polybutadiene; the graphite-phase carbon nitride is produced by Xingxing carbon industry Co.Ltd in the sea-door market; the polystyrene microsphere is a polystyrene microsphere (PSt) manufactured by the Soviet New Material technology (Suzhou).
The heat-resistant modifier is prepared by the following method:
s1, adding graphite-phase carbon nitride into isopropanol according to parts by weight, performing ultrasonic treatment for 4min at 6000Hz, adding acetic acid and chitosan into the isopropanol, and taking an upper suspension after ultrasonic treatment to obtain graphite-phase carbon nitride emulsion for later use;
s2, adding the polydiacid glycol ester and the polymethyl methacrylate into the graphite phase carbon nitride emulsion obtained in the step S1, and stirring for 20min at the speed of 200r/min to obtain a shell material for later use;
s3, mixing the polystyrene microsphere and the polybutadiene, adding the mixture into the shell material obtained in the step S2, centrifuging at a speed of 7000r/min for 8min, washing, performing ultrasonic treatment, drying and grinding to obtain the heat-resistant modifier.
The compatilizer is high rubber powder; the thermoplastic elastomer is polyurethane thermoplastic elastomer, and the polyurethane thermoplastic elastomer is produced by Dongguan city length plastic limited company.
The flame retardant is a mixture composed of brominated polystyrene, decabromodiphenyl ethane and triphenyl phosphate according to the weight ratio of 0.8:0.6:0.3.
The toughening modifier is a mixture composed of nitrile rubber and styrene-butadiene rubber according to the weight ratio of 0.8:0.6.
The coupling agent is a silane coupling agent, and the silane coupling agent is a silane coupling agent KH-570.
The preparation method of the heat-resistant flame-retardant ABS composition comprises the following steps:
according to parts by weight, mixing ABS resin, compatilizer, flame retardant, thermoplastic elastomer, heat-resistant modifier, toughening modifier, lubricant and coupling agent, adding into a main feeding port of an extruder, setting the temperature of the first region to 160 ℃, the temperature of the second region to 175 ℃, the temperature of the third region to 175 ℃, the temperature of the fourth region to 165 ℃, and the temperature of the fifth region to 155 ℃, extruding, adding graphite whiskers into a first exhaust hole or a side feeding port of the extruder, and carrying out melt granulation to obtain the heat-resistant flame-retardant ABS composition.
Example 2
The heat-resistant flame-retardant ABS composition comprises the following raw materials in parts by weight: 45 parts of ABS resin, 2 parts of compatilizer, 7 parts of flame retardant, 2 parts of thermoplastic elastomer, 2 parts of heat-resistant modifier, 5 parts of toughening modifier, 1.5 parts of lubricant, 2 parts of coupling agent and 4 parts of graphite whisker; the lubricant is pentaerythritol stearate.
The heat-resistant modifier comprises the following raw materials in parts by weight: 6 parts of polydiacid glycol ester, 11 parts of polymethyl methacrylate, 5 parts of graphite phase carbon nitride, 6 parts of isopropanol, 0.7 part of acetic acid, 0.25 part of chitosan, 5 parts of polystyrene microsphere and 1.5 parts of polybutadiene; the graphite-phase carbon nitride is produced by Xingxing carbon industry Co.Ltd in the sea-door market; the polystyrene microsphere is a polystyrene microsphere (PSt) manufactured by the Soviet New Material technology (Suzhou).
The heat-resistant modifier is prepared by the following method:
s1, adding graphite-phase carbon nitride into isopropanol according to parts by weight, performing ultrasonic treatment at 7000Hz for 5min, adding acetic acid and chitosan into the isopropanol, and taking an upper suspension after ultrasonic treatment to obtain graphite-phase carbon nitride emulsion for later use;
s2, adding the polydiacid glycol ester and the polymethyl methacrylate into the graphite phase carbon nitride emulsion obtained in the step S1, and stirring at the speed of 250r/min for 25min to obtain a shell material for later use;
s3, mixing the polystyrene microsphere and the polybutadiene, adding the mixture into the shell material obtained in the step S2, centrifuging for 10min at the speed of 7200r/min, washing, performing ultrasonic treatment, drying and grinding to obtain the heat-resistant modifier.
The compatilizer is maleic anhydride.
The flame retardant is a mixture composed of brominated polystyrene, decabromodiphenyl ethane and triphenyl phosphate according to the weight ratio of 0.9:0.7:0.4.
The thermoplastic elastomer is polyurethane thermoplastic elastomer, and is produced by Dongguan city length plastic limited company.
The toughening modifier is a mixture composed of nitrile rubber and styrene-butadiene rubber according to the weight ratio of 0.9:0.7.
The coupling agent is a titanate coupling agent, and the titanate coupling agent is a titanate coupling agent 201.
The preparation method of the heat-resistant flame-retardant ABS composition comprises the following steps:
according to the weight portions, the ABS resin, the compatilizer, the flame retardant, the thermoplastic elastomer, the heat-resistant modifier, the toughening modifier, the lubricant and the coupling agent are mixed and then added into a main feeding port of an extruder, the temperature of the first area is 165 ℃, the temperature of the second area is 178 ℃, the temperature of the third area is 178 ℃, the temperature of the fourth area is 168 ℃, the temperature of the fifth area is 158 ℃, the extrusion is carried out, and meanwhile, graphite whiskers are added into a first exhaust hole or a side feeding port of the extruder, and the heat-resistant flame-retardant ABS composition is obtained through melt granulation.
Example 3
The heat-resistant flame-retardant ABS composition comprises the following raw materials in parts by weight: 50 parts of ABS resin, 3 parts of compatilizer, 8 parts of flame retardant, 3 parts of thermoplastic elastomer, 3 parts of heat-resistant modifier, 6 parts of toughening modifier, 2 parts of lubricant, 3 parts of coupling agent and 5 parts of graphite whisker; the lubricant is pentaerythritol stearate.
The heat-resistant modifier comprises the following raw materials in parts by weight: 7 parts of polydiacid glycol ester, 12 parts of polymethyl methacrylate, 6 parts of graphite phase carbon nitride, 8 parts of isopropanol, 0.8 part of acetic acid, 0.3 part of chitosan, 6 parts of polystyrene microsphere and 2 parts of polybutadiene; the graphite-phase carbon nitride is produced by Xingxing carbon industry Co.Ltd in the sea-door market; the polystyrene microsphere is a polystyrene microsphere (PSt) manufactured by the Soviet New Material technology (Suzhou).
The heat-resistant modifier is prepared by the following method:
s1, adding graphite-phase carbon nitride into isopropanol according to parts by weight, performing ultrasonic treatment for 6min at 8000Hz, adding acetic acid and chitosan into the isopropanol, and taking an upper suspension after ultrasonic treatment to obtain graphite-phase carbon nitride emulsion for later use;
s2, adding the polydiacid glycol ester and the polymethyl methacrylate into the graphite phase carbon nitride emulsion obtained in the step S1, and stirring for 30min at the speed of 300r/min to obtain a shell material for later use;
s3, mixing the polystyrene microsphere and the polybutadiene, adding the mixture into the shell material obtained in the step S2, centrifuging at the speed of 7500r/min for 12min, washing, performing ultrasonic treatment, drying and grinding to obtain the heat-resistant modifier.
The compatilizer is high rubber powder.
The flame retardant is a mixture composed of brominated polystyrene, decabromodiphenyl ethane and triphenyl phosphate according to the weight ratio of 1.0:0.8:0.5.
The thermoplastic elastomer is polyurethane thermoplastic elastomer, and is produced by Dongguan city length plastic limited company.
The toughening modifier is a mixture composed of nitrile rubber and styrene-butadiene rubber according to the weight ratio of 1.0:0.8.
The coupling agent is an aluminate coupling agent, and the aluminate coupling agent is an aluminate coupling agent dl411.
The preparation method of the heat-resistant flame-retardant ABS composition comprises the following steps:
according to parts by weight, mixing ABS resin, compatilizer, flame retardant, thermoplastic elastomer, heat-resistant modifier, toughening modifier, lubricant and coupling agent, adding into a main feeding port of an extruder, setting the temperature of the first region to 170 ℃, the temperature of the second region to 180 ℃, the temperature of the third region to 180 ℃, the temperature of the fourth region to 170 ℃, and the temperature of the fifth region to 160 ℃, extruding, adding graphite whiskers into a first exhaust hole or a side feeding port of the extruder, and carrying out melt granulation to obtain the heat-resistant flame-retardant ABS composition.
Example 4
The heat-resistant flame-retardant ABS composition comprises the following raw materials in parts by weight: 50 parts of ABS resin, 4 parts of compatilizer, 9 parts of flame retardant, 4 parts of thermoplastic elastomer, 4 parts of heat-resistant modifier, 7 parts of toughening modifier, 2.5 parts of lubricant, 4 parts of coupling agent and 6 parts of graphite whisker; the lubricant is pentaerythritol stearate.
The heat-resistant modifier comprises the following raw materials in parts by weight: 8 parts of polydiacid glycol ester, 14 parts of polymethyl methacrylate, 7 parts of graphite phase carbon nitride, 9 parts of isopropanol, 0.9 part of acetic acid, 0.35 part of chitosan, 7 parts of polystyrene microsphere and 2.5 parts of polybutadiene; the graphite-phase carbon nitride is produced by Xingxing carbon industry Co.Ltd in the sea-door market; the polystyrene microsphere is a polystyrene microsphere (PSt) manufactured by the Soviet New Material technology (Suzhou).
The heat-resistant modifier is prepared by the following method:
s1, adding graphite-phase carbon nitride into isopropanol according to parts by weight, performing ultrasonic treatment for 7min at 9000Hz, adding acetic acid and chitosan into the isopropanol, and taking an upper suspension after ultrasonic treatment to obtain graphite-phase carbon nitride emulsion for later use;
s2, adding the polydiacid glycol ester and the polymethyl methacrylate into the graphite phase carbon nitride emulsion obtained in the step S1, and stirring for 35min at the speed of 350r/min to obtain a shell material for later use;
s3, mixing the polystyrene microsphere and the polybutadiene, adding the mixture into the shell material obtained in the step S2, centrifuging for 14min at the speed of 7800r/min, washing, performing ultrasonic treatment, drying and grinding to obtain the heat-resistant modifier.
The compatilizer is high rubber powder.
The flame retardant is a mixture composed of brominated polystyrene, decabromodiphenyl ethane and triphenyl phosphate according to the weight ratio of 1.1:0.9:0.6.
The thermoplastic elastomer is polyurethane thermoplastic elastomer, and is produced by Dongguan city length plastic limited company.
The toughening modifier is a mixture composed of nitrile rubber and styrene-butadiene rubber according to the weight ratio of 1.1:0.9.
The coupling agent is a silane coupling agent, and the silane coupling agent is a silane coupling agent KH-570.
The preparation method of the heat-resistant flame-retardant ABS composition comprises the following steps:
according to the weight portions, the ABS resin, the compatilizer, the flame retardant, the thermoplastic elastomer, the heat-resistant modifier, the toughening modifier, the lubricant and the coupling agent are mixed and then added into a main feeding port of an extruder, the temperature of a first area is 175 ℃, the temperature of a second area is 183 ℃, the temperature of a third area is 183 ℃, the temperature of a fourth area is 173 ℃, the temperature of a fifth area is 163 ℃, the mixture is extruded, and meanwhile graphite whiskers are added into a first exhaust hole or a side feeding port of the extruder, and the heat-resistant flame-retardant ABS composition is obtained through melt granulation.
Example 5
The heat-resistant flame-retardant ABS composition comprises the following raw materials in parts by weight: 60 parts of ABS resin, 5 parts of compatilizer, 10 parts of flame retardant, 5 parts of thermoplastic elastomer, 5 parts of heat-resistant modifier, 8 parts of toughening modifier, 3 parts of lubricant, 5 parts of coupling agent and 7 parts of graphite whisker; the lubricant is pentaerythritol stearate.
The heat-resistant modifier comprises the following raw materials in parts by weight: 10 parts of polydiacid glycol ester, 15 parts of polymethyl methacrylate, 8 parts of graphite phase carbon nitride, 10 parts of isopropanol, 1.0 part of acetic acid, 0.4 part of chitosan, 8 parts of polystyrene microsphere and 3 parts of polybutadiene; the graphite-phase carbon nitride is produced by Xingxing carbon industry Co.Ltd in the sea-door market; the polystyrene microsphere is a polystyrene microsphere (PSt) manufactured by the Soviet New Material technology (Suzhou).
The heat-resistant modifier is prepared by the following method:
s1, adding graphite-phase carbon nitride into isopropanol according to parts by weight, performing ultrasonic treatment for 8min at 10000Hz, adding acetic acid and chitosan into the isopropanol, and taking an upper suspension after ultrasonic treatment to obtain graphite-phase carbon nitride emulsion for later use;
s2, adding the polydiacid glycol ester and the polymethyl methacrylate into the graphite phase carbon nitride emulsion obtained in the step S1, and stirring at the speed of 400r/min for 40min to obtain a shell material for later use;
s3, mixing the polystyrene microsphere and the polybutadiene, adding the mixture into the shell material obtained in the step S2, centrifuging at a speed of 80000r/min for 16min, washing, performing ultrasonic treatment, drying and grinding to obtain the heat-resistant modifier.
The compatilizer is high rubber powder.
The flame retardant is a mixture composed of brominated polystyrene, decabromodiphenyl ethane and triphenyl phosphate according to the weight ratio of 1.2:1.0:0.7.
The thermoplastic elastomer is polyurethane thermoplastic elastomer, and is produced by Dongguan city length plastic limited company.
The toughening modifier is a mixture composed of nitrile rubber and styrene-butadiene rubber according to the weight ratio of 1.2:1.0.
The coupling agent is a titanate coupling agent, and the titanate coupling agent is a titanate coupling agent 201.
The preparation method of the heat-resistant flame-retardant ABS composition comprises the following steps:
according to the weight portions, the ABS resin, the compatilizer, the flame retardant, the thermoplastic elastomer, the heat-resistant modifier, the toughening modifier, the lubricant and the coupling agent are mixed and then added into a main feeding port of an extruder, the temperature of the first area is 180 ℃, the temperature of the second area is 185 ℃, the temperature of the third area is 185 ℃, the temperature of the fourth area is 175 ℃, the temperature of the fifth area is 165 ℃, extrusion is carried out, and meanwhile graphite whiskers are added into a first exhaust hole or a side feeding port of the extruder, and the heat-resistant flame-retardant ABS composition is obtained through melt granulation.
Comparative example 1
This comparative example differs from example 1 described above in that: the raw materials of the heat-resistant flame-retardant ABS composition in this comparative example are not added with a lubricant and graphite whiskers, and the rest of this comparative example is the same as in example 1, and is not repeated here.
Comparative example 2
This comparative example differs from example 3 above in that: the heat-resistant modifier is not added to the raw materials for preparing the heat-resistant flame-retardant ABS composition in this comparative example, and the rest of this comparative example is the same as in example 3, and will not be described here again.
Comparative example 3
This comparative example differs from example 5 above in that: the raw materials for preparing the heat-resistant flame-retardant ABS composition in the comparative example are not added with graphite-phase carbon nitride, isopropanol, acetic acid and chitosan, and the rest of the comparative example is the same as that of example 5, and is not repeated here.
The heat-resistant flame-retardant ABS compositions prepared in examples 1, 3, 5 and comparative examples 1 to 3 were subjected to performance tests, and the test results are shown in Table 1 below:
tensile strength is tested by using GB1040 standard; the elongation at break is tested by using GB1040 standard; bending strength was tested using the GB9341 standard; oxidation index (GB/T2406-2009); the flame retardant grade adopts a GT/T17591-2006 test method.
TABLE 1
As can be seen from the comparison of examples 1, 3 and 5 and comparative examples 1-3, the heat-resistant flame-retardant ABS composition added with the lubricant, the heat-resistant modifier and the graphite whisker has good mechanical properties, flame-retardant effect and stability, and has wide market prospect and application value.
The above embodiments are preferred embodiments of the present invention, and besides, the present invention may be implemented in other ways, and any obvious substitution is within the scope of the present invention without departing from the concept of the present invention.
Claims (8)
1. A heat-resistant flame-retardant ABS composition characterized by: the material comprises the following raw materials in parts by weight: 40-60 parts of ABS resin, 1-5 parts of compatilizer, 5-10 parts of flame retardant, 1-5 parts of thermoplastic elastomer, 1-5 parts of heat-resistant modifier, 4-8 parts of toughening modifier, 1-3 parts of lubricant, 1-5 parts of coupling agent and 3-7 parts of graphite whisker;
the heat-resistant modifier comprises the following raw materials in parts by weight: 5-10 parts of polydiacid glycol ester, 10-15 parts of polymethyl methacrylate, 4-8 parts of graphite phase carbon nitride, 5-10 parts of isopropanol, 0.6-1.0 part of acetic acid, 0.2-0.4 part of chitosan, 4-8 parts of polystyrene microspheres and 1-3 parts of polybutadiene;
the heat-resistant modifier is prepared by the following method:
s1, adding graphite-phase carbon nitride into isopropanol according to parts by weight, performing ultrasonic treatment at 6000-10000Hz for 4-8min, adding acetic acid and chitosan into the isopropanol, and taking an upper suspension after ultrasonic treatment to obtain graphite-phase carbon nitride emulsion for later use;
s2, adding the polydiacid glycol ester and the polymethyl methacrylate into the graphite phase carbon nitride emulsion obtained in the step S1, and stirring at the speed of 200-400r/min for 20-40min to obtain a shell layer material for later use;
s3, mixing the polystyrene microsphere and the polybutadiene, adding the mixture into the shell material obtained in the step S2, centrifuging at a speed of 7000-80000r/min for 8-16min, washing, performing ultrasonic treatment, drying and grinding to obtain the heat-resistant modifier.
2. The heat-resistant flame-retardant ABS composition according to claim 1 wherein: the compatilizer is at least one of high rubber powder or maleic anhydride.
3. The heat-resistant flame-retardant ABS composition according to claim 1 wherein: the flame retardant is at least one of brominated polystyrene, decabromodiphenyl ethane, decabromodiphenyl ether and triphenyl phosphate.
4. The heat-resistant flame-retardant ABS composition according to claim 1 wherein: the thermoplastic elastomer is at least one of polyurethane thermoplastic elastomer and polyether ester thermoplastic elastomer.
5. The heat-resistant flame-retardant ABS composition according to claim 1 wherein: the toughening modifier is at least one of nitrile rubber and styrene-butadiene rubber.
6. The heat-resistant flame-retardant ABS composition according to claim 1 wherein: the lubricant is pentaerythritol stearate.
7. The heat-resistant flame-retardant ABS composition according to claim 1 wherein: the coupling agent is at least one of silane coupling agent, titanate coupling agent, aluminate coupling agent and zirconate coupling agent.
8. A process for preparing a heat-resistant flame-retardant ABS composition according to any one of claims 1 to 7, characterized in that: the preparation method comprises the following steps:
according to the weight portions, the ABS resin, the compatilizer, the flame retardant, the thermoplastic elastomer, the heat-resistant modifier, the toughening modifier, the lubricant and the coupling agent are mixed and then added into a main feeding port of an extruder, the temperature of a first area is 160-180 ℃, the temperature of a second area is 175-185 ℃, the temperature of a third area is 175-185 ℃, the temperature of a fourth area is 165-175 ℃, the temperature of a fifth area is 155-165 ℃, the mixture is extruded, and meanwhile, graphite whiskers are added into a first exhaust hole or a side feeding port of the extruder, and the mixture is subjected to melt granulation to obtain the heat-resistant flame-retardant ABS composition.
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| JP3983388B2 (en) * | 1998-09-29 | 2007-09-26 | 出光興産株式会社 | Thermoplastic resin composition and injection molded article |
| CN101544731B (en) * | 2009-04-27 | 2011-02-16 | 中国科学院长春应用化学研究所 | Transparent polyvinyl chloride toughening modifier with three-layer nuclear shell structure and preparation method thereof |
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