CN115710423B - Composite material and preparation method and application thereof - Google Patents
Composite material and preparation method and application thereof Download PDFInfo
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- CN115710423B CN115710423B CN202211483563.1A CN202211483563A CN115710423B CN 115710423 B CN115710423 B CN 115710423B CN 202211483563 A CN202211483563 A CN 202211483563A CN 115710423 B CN115710423 B CN 115710423B
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- polybutylene terephthalate
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- 239000002131 composite material Substances 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 118
- 239000004417 polycarbonate Substances 0.000 claims abstract description 118
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 109
- -1 polybutylene terephthalate Polymers 0.000 claims abstract description 90
- 238000005809 transesterification reaction Methods 0.000 claims abstract description 81
- 239000003112 inhibitor Substances 0.000 claims abstract description 79
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 26
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 25
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 62
- 238000001125 extrusion Methods 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 32
- 238000007605 air drying Methods 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 27
- 239000012745 toughening agent Substances 0.000 claims description 26
- 238000001035 drying Methods 0.000 claims description 22
- 239000000155 melt Substances 0.000 claims description 19
- 229920001400 block copolymer Polymers 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims description 17
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 13
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 claims description 12
- 229920006225 ethylene-methyl acrylate Polymers 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 8
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 8
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 8
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 7
- 239000000314 lubricant Substances 0.000 claims description 7
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 6
- 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 6
- 235000019820 disodium diphosphate Nutrition 0.000 claims description 6
- GYQBBRRVRKFJRG-UHFFFAOYSA-L disodium pyrophosphate Chemical compound [Na+].[Na+].OP([O-])(=O)OP(O)([O-])=O GYQBBRRVRKFJRG-UHFFFAOYSA-L 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 6
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 6
- 238000005453 pelletization Methods 0.000 claims description 6
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 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 claims description 4
- 239000002216 antistatic agent Substances 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 4
- 239000006082 mold release agent Substances 0.000 claims description 4
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 4
- 229960001763 zinc sulfate Drugs 0.000 claims description 4
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 4
- 229920000402 bisphenol A polycarbonate polymer Polymers 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 15
- 230000000052 comparative effect Effects 0.000 description 17
- 229920005989 resin Polymers 0.000 description 13
- 239000011347 resin Substances 0.000 description 13
- 239000003502 gasoline Substances 0.000 description 11
- 239000003921 oil Substances 0.000 description 9
- 239000000956 alloy Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- QYMGIIIPAFAFRX-UHFFFAOYSA-N butyl prop-2-enoate;ethene Chemical compound C=C.CCCCOC(=O)C=C QYMGIIIPAFAFRX-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 229920006245 ethylene-butyl acrylate Polymers 0.000 description 5
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- 238000002791 soaking Methods 0.000 description 4
- 238000004383 yellowing Methods 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 229920006778 PC/PBT Polymers 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 239000004431 polycarbonate resin Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 241000863480 Vinca Species 0.000 description 1
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Abstract
The invention relates to a composite material, a preparation method and application thereof, wherein the composite material comprises the following components in parts by weight: 10-40 parts of polybutylene terephthalate, 0.5-3 parts of compatilizer, 60-85 parts of polycarbonate, 0.01-2 parts of transesterification inhibitor, 3-8 parts of flexibilizer, 0.1-2 parts of antioxidant and 1-4 parts of other processing aids. The composite material has excellent oil resistance and chemical resistance on the basis of excellent mechanical property and thermal property.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a composite material and a preparation method and application thereof.
Background
With the advent of the 2.0 era of automobile industry, the design and manufacture of automobile parts are greatly changed, and meanwhile, the requirement for the weight reduction of automobiles is further improved. The ever-changing automotive market for automotive plastics while being lightweight has also placed more stringent demands on plastics applications, such as high temperature, corrosion, chemical, reliability, economy, safety, and the like.
The engine cover uses Polycarbonate (PC) material parts, and is difficult to pass the gasoline resistance experiment test of a host manufacturer. PC contains ester group, is easy to absorb water, has poor chemical resistance stability, and has poor effect on aromatic lipids such as gasoline, diesel oil, engine oil, brake oil and the like. PBT has excellent chemical resistance, excellent fluidity, dimensional stability, and is used in a large amount in the fields of electronics and industry. If PBT is used alone, it is of semi-crystalline structure, has a low heat distortion temperature and poor notched impact properties, limiting its use. Therefore, alloy products with excellent comprehensive properties can be prepared by blending and modifying two resins, namely PC and PBT.
CN109721921a discloses an oil-resistant high-impact AS/PBT/PC alloy material and a preparation method thereof, wherein the oil-resistant high-impact AS/PBT/PC alloy material comprises the following components in parts by weight: 25-55 parts of AS resin, 31-50 parts of PBT resin, 5-15 parts of PC resin, 5-25 parts of toughening agent, 1-5 parts of compatilizer and 0.6-1 part of processing aid. By adding the PC component, the compatibility of AS and PBT materials is enhanced, so that the stability of the materials in the production process is improved, the layering of AS and PBT is avoided, and the prepared alloy material has high impact strength and excellent oil resistance; and the AS/PBT/PC has the advantages of simple preparation process, excellent processability and low cost.
CN109562533a discloses a method for producing a polybutylene terephthalate resin composition, and a method for producing a molded article using the polybutylene terephthalate resin composition, wherein a polybutylene terephthalate resin having an inherent viscosity of 0.80 to 0.90dL/g, a fibrous filler having a mass of 40 to 60% of the total mass of the polybutylene terephthalate resin composition, a polycarbonate resin having a ratio of 15 to 28% by mass of the total 100% by mass of the polybutylene terephthalate resin and the polycarbonate resin, and a method for producing a polybutylene terephthalate resin composition, which is a phosphide as a transesterification inhibitor, are melt kneaded by an extruder.
In the prior art, although there are many researches on PBT/PC composite materials, how to provide a composite material with excellent mechanical properties and oil resistance is still of great importance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a composite material and a preparation method and application thereof. The composite material has excellent oil resistance and chemical resistance on the basis of having excellent mechanical property and thermal property. The alloy material developed by the invention is suitable for parts such as main automobile engine hoods, engine baffles and the like which need to resist the environment of gasoline, diesel oil and engine oil, and has wide applicability.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a composite material, which comprises the following components in parts by weight:
in the invention, the PBT has the advantages of high crystallization rate, excellent chemical solvent resistance, high melt index, good fatigue resistance and dimensional stability, good mechanical property, heat resistance, electrical property, high light transmittance and the like of PC resin, and is modified with an aid such as a compatilizer, a transesterification inhibitor and the like to obtain the composite material with excellent comprehensive mechanical property and gasoline soaking resistance, high impact resistance and the like. In the present invention, the polybutylene terephthalate is 10 to 40 parts by weight, for example, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, etc.
The compatibilizing agent is present in an amount of 0.5 to 3 parts by weight, for example 1 part, 1.5 parts, 2 parts, 2.5 parts, etc.
The weight parts of the polycarbonate are 60 to 85 parts, for example 65 parts, 70 parts, 75 parts, 80 parts, etc.
The transesterification inhibitor is 0.01 to 2 parts by weight, for example, 0.05 parts, 0.1 parts, 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, and the like.
The weight parts of the toughening agent are 3-8 parts, such as 4 parts, 5 parts, 6 parts, 7 parts, etc.
The antioxidant is 0.1-2 parts by weight, for example 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, etc.
The other processing aid is 1 to 4 parts by weight, for example 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, etc.
Preferably, the polybutylene terephthalate and the compatibilizer make up a polybutylene terephthalate/compatibilizer masterbatch.
In the invention, the polybutylene terephthalate and the compatilizer are integrated master batches, namely the polybutylene terephthalate/compatilizer master batches, which are beneficial to improving the more uniform dispersion of the compatilizer in the composite material, enabling particles of each component to be miniaturized and obviously improving the impact resistance and heat resistance of the composite material.
Preferably, the polycarbonate is split into two parts, wherein a part of the polycarbonate and the transesterification inhibitor constitute the polycarbonate/transesterification inhibitor masterbatch.
In the invention, part of the polycarbonate and the transesterification inhibitor are taken as integral master batches, namely the polycarbonate/transesterification inhibitor master batches, and the production of random block copolyesters is prevented by adding the transesterification inhibitor master batches, so that the random block copolyesters are more uniformly distributed and dispersed, the performance and physical properties are uniform, meanwhile, the yellowing of the composite material is avoided, the PC/PBT interface compatibility is improved, and the impact toughness of a blending system is integrally improved.
Preferably, the composite material comprises the following components in parts by weight:
in the invention, the weight parts of the polybutylene terephthalate/compatilizer master batch are 10.5-43 parts, such as 12 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts and the like.
The polycarbonate/transesterification inhibitor master batch is 10-56 parts by weight, for example 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts and the like.
The polycarbonate is 29 to 69 parts by weight, for example, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, etc.
The weight parts of the toughening agent are 3-8 parts, such as 4 parts, 5 parts, 6 parts, 7 parts, etc.
The antioxidant is 0.1-2 parts by weight, for example 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, etc.
The other processing aid is 1 to 4 parts by weight, for example 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, etc.
Preferably, the polybutylene terephthalate has a viscosity of 0.9 to 1.1 Pa-s, for example 0.92 Pa-s, 0.94 Pa-s, 0.96 Pa-s, 0.98 Pa-s, 1 Pa-s, 1.02 Pa-s, 1.04 Pa-s, 1.06 Pa-s, 1.08 Pa-s, etc.
Preferably, the compatibilizing agent comprises any one or a combination of at least two of ethylene methyl acrylate copolymer (EMA), methyl all acrylate (MA), ethylene Butyl Acrylate (EBA) or styrene-ethylene-butadiene-styrene block copolymer (SEBS), wherein typical but non-limiting combinations include: a combination of an ethylene methyl acrylate copolymer and a methyl all acrylate, a combination of an ethylene butyl acrylate and a styrene-ethylene-butadiene-styrene block copolymer, a combination of an ethylene methyl acrylate copolymer, a methyl all acrylate, an ethylene butyl acrylate and a styrene-ethylene-butadiene-styrene block copolymer, and the like, and further preferably an ethylene methyl acrylate copolymer in which the mass percentage of methyl acrylate is 15% to 35%, for example, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, and the like, and further preferably 25%.
In the present invention, the ethylene methyl acrylate copolymer has a mass content of MA of 20% to 30%, for example, 22%, 24%, 26%, 28%, etc., and more preferably 25%, and is translucent particles.
Preferably, the polycarbonate comprises bisphenol a type polycarbonate, more preferably phosgene process polycarbonate.
Preferably, the polycarbonate has a melt flow rate of 10 to 30g/10min, such as 12g/10min, 14g/10min, 16g/10min, 18g/10min, 20g/10min, 22g/10min, 24g/10min, 26g/10min, 28g/10min, etc., at 300℃and 1.2 kg.
Preferably, the transesterification inhibitor comprises any one or a combination of at least two of sodium dihydrogen phosphate, disodium dihydrogen pyrophosphate, ethyl orthosilicate, triphenyl phosphite, or zinc sulfate, wherein typical but non-limiting combinations include: sodium dihydrogen phosphate and disodium dihydrogen pyrophosphate, ethyl orthosilicate and triphenyl phosphite, disodium dihydrogen pyrophosphate, ethyl orthosilicate, triphenyl phosphite and zinc sulfate, and the like, and sodium dihydrogen phosphate is further preferable.
Preferably, the toughening agent comprises any one or a combination of at least two of methacrylic acid-butadiene-styrene copolymer (MBS), styrene-ethylene-butadiene-styrene block copolymer (SEBS) or acrylonitrile-butadiene-styrene block copolymer, wherein typical but non-limiting combinations include: a combination of methacrylic acid-butadiene-styrene copolymer and styrene-ethylene-butadiene-styrene block copolymer, a combination of styrene-ethylene-butadiene-styrene block copolymer and acrylonitrile-butadiene-styrene block copolymer, a combination of methacrylic acid-butadiene-styrene copolymer, styrene-ethylene-butadiene-styrene block copolymer and acrylonitrile-butadiene-styrene block copolymer, and the like.
In the present invention, the acrylonitrile-butadiene-styrene block copolymer is an acrylonitrile-butadiene-styrene block polymer (ABS), in which the mass content of butadiene is 55% -70%, for example 56%, 58%, 60%, 62%, 64%, 66%, 68%, etc.
Preferably, the antioxidant comprises pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and/or tris (2, 4-di-tert-butylphenyl) phosphite.
Preferably, the other processing aids include any one or a combination of at least two of antistatic agents, colorants, lubricants, mold release agents, or flame retardants, wherein typical but non-limiting combinations include: a combination of an antistatic agent and a colorant, a combination of a lubricant, a mold release agent and a flame retardant, a combination of an antistatic agent, a colorant, a lubricant, a mold release agent and a flame retardant, and the like.
In a second aspect, the present invention provides a method for preparing the composite material according to the first aspect, the method comprising the steps of: and mixing and processing the polybutylene terephthalate, the compatilizer, the polycarbonate, the transesterification inhibitor, the toughening agent, the antioxidant and other processing aids to obtain the composite material.
Preferably, the preparation method comprises the following steps:
(1) Mixing polybutylene terephthalate and a compatilizer to form a polybutylene terephthalate and compatilizer compound, namely polybutylene terephthalate/compatilizer master batch;
(2) Dividing the polycarbonate into two parts, mixing and processing one part of the polycarbonate and the transesterification inhibitor to form a polycarbonate and transesterification inhibitor compound, namely a polycarbonate/transesterification inhibitor master batch;
(3) And mixing and processing the polybutylene terephthalate/compatilizer master batch, the polycarbonate/transesterification inhibitor master batch, the toughening agent, the antioxidant and other processing aids to obtain the composite material.
In the invention, the composite material adopts a secondary granulation process, has the advantages of high PBT crystallization rate, excellent chemical solvent resistance, high melt index, good fatigue resistance, good dimensional stability, good mechanical property, heat resistance, electrical property, high light transmittance and the like of PC resin, and is blended and modified with a compatilizer master batch and a transesterification inhibitor master batch to obtain the composite material with excellent comprehensive mechanical property, gasoline soaking resistance, high impact resistance and the like.
Preferably, in step (1), the mode of the mixing process includes melt extrusion.
Preferably, the temperature of the melt extrusion is 180-230 ℃, e.g., 185 ℃, 190 ℃, 195 ℃, 200 ℃, 205 ℃, 210 ℃, 215 ℃,220 ℃, 225 ℃, etc.
Preferably, the melt extrusion is preceded by drying the polybutylene terephthalate.
Preferably, the drying temperature is 80-120 ℃, e.g., 100 ℃, 105 ℃, 110 ℃, 115 ℃, etc.
Preferably, the melt extrusion further comprises cooling, air drying and pelletizing.
Preferably, in the step (2), the mode of the mixing processing includes melt extrusion.
Preferably, the temperature of the melt extrusion is 180-230 ℃, e.g., 185 ℃, 190 ℃, 195 ℃, 200 ℃, 205 ℃, 210 ℃, 215 ℃,220 ℃, 225 ℃, etc.
Preferably, the melt extrusion is preceded by drying the polycarbonate.
Preferably, the drying temperature is 80-120 ℃, e.g., 100 ℃, 105 ℃, 110 ℃, 115 ℃, etc.
Preferably, the melt extrusion further comprises cooling, air drying and pelletizing.
Preferably, in the step (3), the mode of the mixing process includes stirring and melt extrusion.
Preferably, the temperature of the melt extrusion is 190-230 ℃, e.g., 195 ℃, 200 ℃, 205 ℃, 210 ℃, 215 ℃,220 ℃, 225 ℃, etc.
Preferably, the stirring is carried out at a speed of 350-450 rpm, for example 360 rpm, 380 rpm, 400 rpm, 420 rpm, 440 rpm, etc.
Preferably, the means of mixing processing comprises a twin screw extruder.
Preferably, the mode of mixing processing comprises the steps of uniformly mixing and stirring polycarbonate/transesterification inhibitor master batches, a toughening agent, an antioxidant and other processing aids, putting the mixture into a double-screw extruder, adding polybutylene terephthalate/compatilizer master batches into a side feeding hopper, and extruding.
Preferably, the melt extrusion further comprises cooling, air drying and pelletizing.
As a preferable technical scheme, the preparation method comprises the following steps:
(1) Drying polybutylene terephthalate at 80-120 ℃, carrying out melt extrusion on the dried polybutylene terephthalate and a compatilizer at 180-230 ℃, and then cooling, air-drying and granulating to form a polybutylene terephthalate and compatilizer compound, namely a polybutylene terephthalate/compatilizer master batch;
(2) Drying polycarbonate at 80-120 ℃, dividing the dried polycarbonate into two parts, carrying out melt extrusion on one part of polycarbonate and a transesterification inhibitor at 180-230 ℃, and then cooling, air-drying and granulating to form a polycarbonate and transesterification inhibitor compound, namely a polycarbonate/transesterification inhibitor master batch;
(3) And (3) uniformly mixing and stirring polycarbonate, polycarbonate/transesterification inhibitor master batch, a toughening agent, an antioxidant and other processing aids, putting the mixture into a double-screw extruder, adding polybutylene terephthalate/compatilizer master batch into a side feeding hopper, carrying out melt extrusion under the conditions of rotating speed of 350-450 r/min and temperature of 190-230 ℃, and then cooling, air-drying and granulating to obtain the composite material.
In a third aspect, the present invention provides an automotive component comprising the composite material of the first aspect.
Compared with the prior art, the invention has the following beneficial effects:
(1) The composite material has excellent oil resistance and chemical resistance on the basis of excellent mechanical property and thermal property.
(2) The tensile strength of the composite material is 52-59MPa, the elongation at break is 110-135%, the bending strength is 70.9-80.5MPa, the bending modulus is 1920-2300MPa, and the notch impact strength is 675-820J/m 2 The melt index of HDT is between 21.2 and 28.2g/10min under the conditions of 88-102 ℃,220 ℃ and 10kg, and the mechanical property and the thermal property are excellent.
(3) The composite material is injection molded into a spiral line fluidity test sample, does not crack, is injection molded into a high-light color plate mold, and has small color change on the surface of a color plate.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
In the present invention, the purchase information of part of the raw materials according to each example is as follows:
PBT: polybutylene terephthalate with a viscosity of 0.9-1.1 Pa.s, purchased from vinca taiwanensis, and with a brand of 1100-211M;
PC: bisphenol A type polycarbonate with the melt flow rate of 10-30g/10min (300 ℃/1.2 kg) purchased from Shandong Ruxi chemical industry and the brand of LXTY1609T-11;
EMA: ethylene methyl acrylate copolymer, available from alcomax under the trade designation 29MA03T;
EBA: styrene-ethylene-butadiene-styrene block copolymer, commercially available from dupont under the designation PTW;
MBS: methacrylic acid-butadiene-styrene copolymer, available from brillouin under the designation M724;
SEBS: styrene-ethylene-butadiene-styrene block copolymer, purchased from taiwan table rubber, brand S6151;
acrylonitrile-butadiene-styrene copolymer: purchased from Jinhu with the trade name HR181.
Example 1
The embodiment provides a composite material, which comprises the following components in parts by weight:
in this embodiment, in the polybutylene terephthalate/compatibilizer masterbatch, the weight portion of polybutylene terephthalate is 14.25 portions; the weight part of the compatibilizer (EMA) was 0.75 part.
In the polycarbonate/transesterification inhibitor master batch, the weight part of polycarbonate is 9.9 parts; the weight part of the transesterification inhibitor (sodium dihydrogen phosphate) was 0.1 part.
Toughening agent: methacrylic acid-butadiene-styrene copolymer (MBS).
An antioxidant: pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and tris (2, 4-di-tert-butylphenyl) phosphite in a mass ratio of 1:2.
Other processing aids: the name lubricant is available from Clariant under the trade name LICOWAX E POWDER.
The composite material is prepared by a method comprising the following steps:
(1) Drying polybutylene terephthalate at 110 ℃, carrying out melt extrusion on the dried polybutylene terephthalate and a compatilizer at 200 ℃, and then cooling, air-drying and granulating to form a polybutylene terephthalate and compatilizer compound, namely a polybutylene terephthalate/compatilizer master batch;
(2) Drying the polycarbonate at 100 ℃, carrying out melt extrusion on a part of the dried polycarbonate and the transesterification inhibitor at 210 ℃, and then cooling, air-drying and granulating to form a polycarbonate and transesterification inhibitor compound, namely a polycarbonate/transesterification inhibitor master batch;
(3) And (3) uniformly mixing and stirring polycarbonate, polycarbonate/transesterification inhibitor master batch, a toughening agent, an antioxidant and other processing aids, putting the mixture into a double-screw extruder, adding polybutylene terephthalate/compatilizer master batch into a side feeding hopper, carrying out melt extrusion under the conditions of 400 revolutions per minute and 210 ℃ of rotating speed, and then cooling, air-drying and granulating to obtain the composite material.
Example 2
The embodiment provides a composite material, which comprises the following components in parts by weight:
in this embodiment, in the polybutylene terephthalate/compatibilizer masterbatch, the weight portion of polybutylene terephthalate is 14.25 portions; the parts by weight of compatibilizer (PTW) was 0.75 parts.
In the polycarbonate/transesterification inhibitor master batch, the weight part of polycarbonate is 49.975 parts; the weight part of the transesterification inhibitor (disodium dihydrogen pyrophosphate) was 0.025 part.
Toughening agent: methacrylic acid-butadiene-styrene copolymer (MBS).
An antioxidant: pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and tris (2, 4-di-tert-butylphenyl) phosphite in a mass ratio of 1:2.
Other processing aids: the name lubricant is available from Clariant under the trade name LICOWAX E POWDER.
The composite material is prepared by a method comprising the following steps:
(1) Drying polybutylene terephthalate at 110 ℃, carrying out melt extrusion on a part of the dried polybutylene terephthalate and a compatilizer at 200 ℃, and then cooling, air-drying and granulating to form a polybutylene terephthalate and compatilizer compound, namely a polybutylene terephthalate/compatilizer master batch;
(2) Drying polycarbonate at 100 ℃, carrying out melt extrusion on the dried polycarbonate and the transesterification inhibitor at 210 ℃, and then cooling, air-drying and granulating to form a polycarbonate and transesterification inhibitor compound, namely a polycarbonate/transesterification inhibitor master batch;
(3) And (3) uniformly mixing and stirring polycarbonate, polycarbonate/transesterification inhibitor master batch, a toughening agent, an antioxidant and other processing aids, putting the mixture into a double-screw extruder, adding polybutylene terephthalate/compatilizer master batch into a side feeding hopper, carrying out melt extrusion under the conditions of 400 revolutions per minute and 210 ℃ of rotating speed, and then cooling, air-drying and granulating to obtain the composite material.
Example 3
The embodiment provides a composite material, which comprises the following components in parts by weight:
in this embodiment, in the polybutylene terephthalate/compatibilizer, the polybutylene terephthalate is 19 parts by weight; the weight part of the compatilizer (SEBS) is 1 part.
In the polycarbonate/transesterification inhibitor, the weight part of polycarbonate is 48 parts; the weight part of the transesterification inhibitor (triphenyl phosphite) is 2 parts.
Toughening agent: the high-glue powder is prepared from the high-glue powder,
an antioxidant: pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and tris (2, 4-di-tert-butylphenyl) phosphite in a mass ratio of 1:2.
Other processing aids: the name lubricant is available from Clariant under the trade name LICOWAX E FL.
The composite material is prepared by a method comprising the following steps:
(1) Drying polybutylene terephthalate at 110 ℃, carrying out melt extrusion on a part of the dried polybutylene terephthalate and a compatilizer at 200 ℃, and then cooling, air-drying and granulating to form a polybutylene terephthalate and compatilizer compound, namely a polybutylene terephthalate/compatilizer master batch;
(2) Drying polycarbonate at 100deg.C, melt extruding the dried polycarbonate and transesterification inhibitor at 210 deg.C, cooling, air drying and granulating to form polycarbonate and transesterification inhibitor composite, i.e. polycarbonate/transesterification inhibitor master batch;
(3) And (3) uniformly mixing and stirring polycarbonate, polycarbonate/transesterification inhibitor master batch, a toughening agent, an antioxidant and other processing aids, putting the mixture into a double-screw extruder, adding polybutylene terephthalate/compatilizer master batch into a side feeding hopper, carrying out melt extrusion under the conditions of 400 revolutions per minute and 210 ℃ of rotating speed, and then cooling, air-drying and granulating to obtain the composite material.
Example 4
The embodiment provides a composite material, which comprises the following components in parts by weight:
in this embodiment, in the polybutylene terephthalate/compatibilizer, the polybutylene terephthalate is 10 parts by weight; the weight part of the compatilizer (ethylene methyl acrylate copolymer and full methyl acrylate with the mass ratio of 1:1) is 0.5 part.
In the polycarbonate/transesterification inhibitor, the weight part of polycarbonate is 85 parts; the weight part of the transesterification inhibitor (sodium dihydrogen phosphate and disodium dihydrogen pyrophosphate with the mass ratio of 1:1) is 2 parts.
Toughening agent: styrene-ethylene-butadiene-styrene block copolymers.
An antioxidant: the mass ratio is 1: pentaerythritol tetrakis [3- (3, 5-di-tert-butyl 4-hydroxyphenyl) propionate ] and tris (2, 4-di-tert-butylphenyl) phosphite of 1.
Other processing aids: the name is a release agent, purchased from Sanjing and the trade name is 400P.
The composite material is prepared by a method comprising the following steps:
(1) Drying polybutylene terephthalate at 80 ℃, carrying out melt extrusion on the dried polybutylene terephthalate and a compatilizer at 180 ℃, and then cooling, air-drying and granulating to form a polybutylene terephthalate and compatilizer compound, namely a polybutylene terephthalate/compatilizer master batch;
(2) Drying polycarbonate at 120 ℃, carrying out melt extrusion on the dried polycarbonate and the transesterification inhibitor at 230 ℃, and then cooling, air-drying and granulating to form a polycarbonate and transesterification inhibitor compound, namely a polycarbonate/transesterification inhibitor master batch;
(3) And (3) uniformly mixing and stirring the polycarbonate/transesterification inhibitor master batch, the toughening agent, the antioxidant and other processing aids, putting the mixture into a double-screw extruder, adding the polybutylene terephthalate/compatilizer master batch into a side feeding hopper, carrying out melt extrusion at the rotating speed of 450 rpm and the temperature of 230 ℃, and then cooling, air-drying and granulating to obtain the composite material.
Example 5
The embodiment provides a composite material, which comprises the following components in parts by weight:
in this embodiment, in the polybutylene terephthalate/compatibilizer, the weight portion of polybutylene terephthalate is 40; the weight part of the compatilizer (ethylene propylene butyl ester and styrene-ethylene-butadiene-styrene block copolymer with the mass ratio of 1:1) is 3 parts.
In the polycarbonate/transesterification inhibitor, the weight part of the polycarbonate is 60 parts; the weight parts of the transesterification inhibitor (ethyl orthosilicate, triphenyl phosphite and zinc sulfate with the mass ratio of 1:2:1) are 0.1 parts.
Toughening agent: methacrylic acid-butadiene-styrene copolymer.
The antioxidant pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].
Other processing aids: the flame retardant poly aryl phosphate is named as fire retardant poly aryl phosphate, which is purchased from Zhejiang Mo Cheng and has the brand name of WSFR-PX-220.
The composite material is prepared by a method comprising the following steps:
(1) Drying polybutylene terephthalate at 120 ℃, carrying out melt extrusion on the dried polybutylene terephthalate and a compatilizer at 230 ℃, and then cooling, air-drying and granulating to form a polybutylene terephthalate and compatilizer compound, namely a polybutylene terephthalate/compatilizer master batch;
(2) Drying polycarbonate at 80 ℃, carrying out melt extrusion on the dried polycarbonate and the transesterification inhibitor at 180 ℃, and then cooling, air-drying and granulating to form a polycarbonate and transesterification inhibitor compound, namely a polycarbonate/transesterification inhibitor master batch;
(3) And (3) uniformly mixing and stirring the polycarbonate/transesterification inhibitor master batch, the toughening agent, the antioxidant and other processing aids, putting the mixture into a double-screw extruder, adding the polybutylene terephthalate/compatilizer master batch into a side feeding hopper, carrying out melt extrusion under the conditions of rotating speed of 350 rpm and temperature of 190 ℃, and then cooling, air-drying and granulating to obtain the composite material.
Comparative example 1
This comparative example differs from example 1 in that the composite material does not include polybutylene terephthalate/compatibilizer and transesterification inhibitor, the weight part of polycarbonate is 93.5 parts, and the remainder is the same as in example 1.
Comparative example 2
This comparative example differs from example 1 in that the composite material does not include a transesterification inhibitor, and the polycarbonate is 78.5 parts by weight, with the remainder being the same as example 1.
Comparative example 3
This comparative example differs from example 1 in that the composite polybutylene terephthalate/compatibilizer is 30 parts by weight (wherein polybutylene terephthalate is 28.5 parts and compatibilizer is 1.5 parts), no transesterification inhibitor is included, and the polycarbonate is 63.5 parts by weight, all of which are the same as in example 1.
Comparative example 4
This comparative example differs from example 1 in that the preparation of polybutylene terephthalate/compatibilizer and polycarbonate/transesterification inhibitor was not performed, and the respective raw materials were directly mixed, and the remainder was the same as in example 1.
Performance testing
The composites described in examples 1-5 and comparative examples 1-4 were tested as follows:
(1) Tensile strength: according to D638;
(2) Elongation at break: according to D638;
(3) Flexural strength: according to D790;
(4) Flexural modulus: according to D790;
(5) Notched impact strength: according to the standard of D256;
(7) HDT (1.82 MPa): heat distortion temperature, according to D648;
(8) Melt index (220 ℃,10 kg): according to the standard of D1238;
(9) Oil resistance: the composite material is injection molded into a spiral line fluidity test sample and a high-light color plate mold, soaked in conventional gasoline (92 # petroleum adopted by the invention) for 2 hours, taken out and stood for 12 hours, and the surface cracking and color changing conditions are observed, wherein the color changing conditions are respectively 1 level, 2 level, 3 level and 4 level in sequence, the 1 level color change is the smallest, the most stable, the 4 level color change is the largest, and the stability is the worst.
The test results are summarized in tables 1-2.
TABLE 1
TABLE 2
As can be seen from an analysis of the data in tables 1-2, the composite material of the present invention has a tensile strength of 52-59MPa, an elongation at break of 110-135%, a flexural strength of 70.9-80.5MPa, a flexural modulus of 1920-2300MPa, and a notched impact strength of 675-820J/m 2 The melt index of HDT is between 21.2 and 28.2g/10min under the conditions of 88 ℃ to 102 ℃,220 ℃ and 10kg, and the mechanical property and the thermal property are excellent; the composite material is injection molded into a spiral line fluidity test sample, does not crack, is injection molded into a high-light color plate mold, and has small color change on the surface of a color plate. The composite material has excellent oil resistance and chemical resistance on the basis of excellent mechanical property and thermal property.
Analysis of comparative examples 1-3 and example 3 shows that the cracking of the spiral flow test specimens is determined by the resistance to gasoline chemistry under injection stress; pure PC has poor gasoline chemical resistance and obvious cracking under stress. With the increase of the addition amount of the compatilizer master batch, the addition of the PBT resin obviously improves the chemical resistance of the alloy material, and meanwhile, the color change of the surface of the color plate is smaller, because the PBT molding temperature is lower during injection molding, part of the PBT preferentially migrates to the surface of a workpiece, the PBT has higher crystallinity, and a crystal area formed by the PBT has a perfect structure to prevent grease such as gasoline from seeping into a PC layer, thereby playing a role in blocking and protecting. The addition of the compatilizer overcomes the defects of poor fluidity, low melt index and the like of the original pure PC resin, especially the notch impact strength is improved by about 6 to 12 percent compared with the pure PC, and the PBT and the compatilizer form the composite material through pretreatment, which is equivalent to the secondary extrusion granulation, the particle size of the particles is reduced, the compatibility is improved, and meanwhile, the surface glossiness of the alloy is maintained.
Comparative example 2 was a blank test, and examples 1, 3 and 3, comparative example 2 were excellent in comprehensive mechanical properties, but poor in yellowing resistance and chemical resistance. Comparative example 2 blank the effect of yellowing resistance and chemical resistance is evident in the comparative example 3 blank with the addition of PBT content, but is significantly worse than in examples 1-3 with the addition of transesterification inhibitor masterbatch, while the impact properties of comparative example 3 occasionally show brittle failure. The PC and the PBT are subjected to blending modification, and ester exchange reaction is carried out to generate block copolyesters, and part of the block copolyesters have the effect of compatibility and enhancement complementation, but the reaction has randomness, so that the crystallinity is inconsistent, and meanwhile, the relative molecular mass of the PBT is reduced, so that the chemical resistance of the product is synchronously reduced, and the fluctuation of the product is large.
However, with the addition of the transesterification inhibitor, the amount of the agent is gradually increased within a limited range, and the comprehensive performance of the material is more excellent and stable. The reason is that the transesterification inhibitor is a mild acidic solid stabilizer, can inhibit the residual titanium catalyst in the PBT synthesis, slows down the rate of transesterification and does not cause alloy degradation. Meanwhile, the PC and the transesterification inhibitor are subjected to masterbatches to form a composite material, so that the dispersibility is improved, the interface binding force is improved, the acidity is increased along with the increase of the addition amount, and the physical properties are reduced, so that the polycarbonate/transesterification inhibitor master batch has the optimal addition amount.
Analysis of comparative example 4 and example 1 shows that comparative example 4 performs less well than example 1, demonstrating better performance of the composite material of the present invention.
Analysis of examples 4-5 and example 1 shows that examples 4-5 are not as good as example 1, demonstrating that the formation of a masterbatch from a portion of the polycarbonate with the transesterification inhibitor results in a composite with better properties.
The gasoline-soaking-resistant PC/PBT composite material prepared in the implementation of the formula of the examples 1-3 is optimal in the formula of the example 3, various performance indexes are balanced, and when the PBT resin and the compatilizer are pre-blended and then the transesterification inhibition master batch and the PC resin are added, the preparation method is equivalent to the secondary extrusion of the PC resin and the toughener, the particle size of the particles is reduced, the dispersion distribution of each system is more uniform, and the compatibility is better. The material has the advantages of ensuring the mechanical property of the material, ensuring the fluidity of the material, resisting long-term soaking of gasoline, resisting the effect of yellowing of color and the like, showing excellent comprehensive performance in the application of products needing to resist the gasoline environment, such as automobile engine cover shells and the like, and providing a new way for developing green materials.
The present invention is described in detail by the above examples, but the present invention is not limited to the above detailed methods, i.e., it does not mean that the present invention must be practiced depending on the above detailed methods. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of raw materials for the product of the present invention, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present invention and the scope of disclosure.
Claims (27)
1. The composite material is characterized by comprising the following components in parts by weight:
10-40 parts of polybutylene terephthalate
0.5-3 parts of compatilizer
60-85 parts of polycarbonate
0.01-2 parts of transesterification inhibitor
3-8 parts of toughening agent
0.1-2 parts of antioxidant
1-4 parts of other processing aids;
the polybutylene terephthalate and the compatilizer form 10.5-43 parts by weight of polybutylene terephthalate/compatilizer master batch;
the polycarbonate is divided into two parts, wherein one part of the polycarbonate and the transesterification inhibitor form 10-56 parts by weight of polycarbonate/transesterification inhibitor master batch;
the transesterification inhibitor comprises any one or a combination of at least two of sodium dihydrogen phosphate, disodium dihydrogen pyrophosphate, tetraethoxysilane, triphenyl phosphite or zinc sulfate;
the compatilizer is any one or a combination of at least two of ethylene methyl acrylate copolymer, full methyl acrylate, ethylene propylene butyl ester or styrene-ethylene-butadiene-styrene block copolymer;
the composite material is prepared by the following method, and the preparation method comprises the following steps:
mixing and processing the polybutylene terephthalate and the compatilizer to form polybutylene terephthalate/compatilizer master batch, mixing and processing part of polycarbonate and the transesterification inhibitor to form polycarbonate/transesterification inhibitor master batch, and finally mixing and processing the polybutylene terephthalate/compatilizer master batch, the polycarbonate/transesterification inhibitor master batch, the toughening agent, the antioxidant and other processing aids to obtain the composite material.
2. The composite material according to claim 1, wherein the composite material comprises the following components in parts by weight:
10.5-43 parts of polybutylene terephthalate/compatilizer master batch
10-56 parts of polycarbonate/transesterification inhibitor master batch
29-69 parts of polycarbonate
3-8 parts of toughening agent
0.1-2 parts of antioxidant
1-4 parts of other processing aids.
3. The composite material of claim 1, wherein the polybutylene terephthalate has a viscosity of 0.9-1.1Pa s.
4. The composite of claim 1, wherein the polycarbonate comprises bisphenol a polycarbonate.
5. The composite of claim 1, wherein the polycarbonate has a melt flow rate of 10 to 30g/10min at 300 ℃ and 1.2 kg.
6. The composite of claim 1, wherein the toughening agent comprises any one or a combination of at least two of a methacrylic acid-butadiene-styrene copolymer, a styrene-ethylene-butadiene-styrene block copolymer, or an acrylonitrile-butadiene-styrene block copolymer.
7. The composite material of claim 1, wherein the antioxidant comprises pentaerythritol tetrakis [3- (3, 5-di-tert-butyl 4-hydroxyphenyl) propionate and/or tris (2, 4-di-tert-butylphenyl) phosphite.
8. The composite of claim 1, wherein the other processing aid comprises any one or a combination of at least two of an antistatic agent, a colorant, a lubricant, a mold release agent, or a flame retardant.
9. A method of preparing a composite material according to any one of claims 1 to 8, comprising the steps of:
(1) Mixing polybutylene terephthalate and compatilizer master batch to form polybutylene terephthalate and compatilizer compound, namely polybutylene terephthalate/compatilizer master batch;
(2) Dividing the polycarbonate into two parts, mixing and processing one part of the polycarbonate and the transesterification inhibitor to form a polycarbonate and transesterification inhibitor compound, namely a polycarbonate/transesterification inhibitor master batch;
(3) And mixing and processing the polybutylene terephthalate/compatilizer master batch, the polycarbonate/transesterification inhibitor master batch, the toughening agent, the antioxidant and other processing aids to obtain the composite material.
10. The method of claim 9, wherein in step (1), the means of mixing comprises melt extrusion.
11. The method of claim 10, wherein the melt extrusion temperature is 180-230 ℃.
12. The method of claim 10, further comprising drying the polybutylene terephthalate prior to melt extrusion.
13. The method of claim 12, wherein the drying temperature is 80-120 ℃.
14. The method of claim 10, wherein the melt extruding further comprises cooling, air drying, and pelletizing.
15. The method of claim 9, wherein in step (2), the means of mixing comprises melt extrusion.
16. The method of claim 15, wherein the melt extrusion temperature is 180-230 ℃.
17. The method of claim 15, further comprising drying the polycarbonate prior to melt extruding.
18. The method of claim 17, wherein the drying temperature is 80-120 ℃.
19. The method of claim 15, wherein the melt extruding further comprises cooling, air drying, and pelletizing.
20. The method of claim 9, wherein in step (3), the mixing process comprises stirring and melt extrusion.
21. The method of claim 20, wherein the melt extrusion temperature is 190-230 ℃.
22. The method of claim 20, wherein the stirring is at a speed of 350 to 450 rpm.
23. The method of claim 20, wherein the means for mixing comprises a twin screw extruder.
24. The method of claim 23, wherein the mixing comprises mixing the polycarbonate/transesterification inhibitor masterbatch, the toughening agent, the antioxidant and the other processing aids, stirring the mixture uniformly, placing the mixture into a twin-screw extruder, adding the polybutylene terephthalate/compatibilizer masterbatch into a side feeding hopper, and extruding the mixture.
25. The method of claim 20, wherein the melt extruding further comprises cooling, air drying, and pelletizing.
26. The preparation method according to claim 9, characterized in that the preparation method comprises the steps of:
(1) Drying polybutylene terephthalate at 80-120 ℃, carrying out melt extrusion on the dried polybutylene terephthalate and a compatilizer at 180-230 ℃, and then cooling, air-drying and granulating to form a polybutylene terephthalate and compatilizer compound, namely a polybutylene terephthalate/compatilizer master batch;
(2) Drying polycarbonate at 80-120 ℃, dividing the dried polycarbonate into two parts, carrying out melt extrusion on one part of polycarbonate and a transesterification inhibitor at 180-230 ℃, and then cooling, air-drying and granulating to form a polycarbonate and transesterification inhibitor compound, namely a polycarbonate/transesterification inhibitor master batch;
(3) And (3) uniformly mixing and stirring polycarbonate, polycarbonate/transesterification inhibitor master batch, a toughening agent, an antioxidant and other processing aids, putting the mixture into a double-screw extruder, adding polybutylene terephthalate/compatilizer master batch into a side feeding hopper, carrying out melt extrusion under the conditions of rotating speed of 350-450 r/min and temperature of 190-230 ℃, and then cooling, air-drying and granulating to obtain the composite material.
27. An automotive component, characterized in that it comprises the composite material according to any one of claims 1 to 8.
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