CN111961326A - PC/ABS encapsulation injection molding process - Google Patents
PC/ABS encapsulation injection molding process Download PDFInfo
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- CN111961326A CN111961326A CN202010878396.5A CN202010878396A CN111961326A CN 111961326 A CN111961326 A CN 111961326A CN 202010878396 A CN202010878396 A CN 202010878396A CN 111961326 A CN111961326 A CN 111961326A
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- acrylonitrile
- polycarbonate
- butadiene
- antioxidant
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- 229920007019 PC/ABS Polymers 0.000 title claims abstract description 37
- 238000001746 injection moulding Methods 0.000 title claims abstract description 15
- 238000005538 encapsulation Methods 0.000 title description 5
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 59
- 239000004417 polycarbonate Substances 0.000 claims abstract description 59
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 52
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 23
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 23
- 239000000314 lubricant Substances 0.000 claims abstract description 22
- 239000003822 epoxy resin Substances 0.000 claims abstract description 20
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 16
- 229920003023 plastic Polymers 0.000 claims abstract description 15
- 239000004033 plastic Substances 0.000 claims abstract description 15
- 238000010073 coating (rubber) Methods 0.000 claims abstract description 6
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 22
- 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 21
- 239000004611 light stabiliser Substances 0.000 claims description 20
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical group CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 11
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- PFNROQCAJVOSIR-UHFFFAOYSA-N oxiran-2-ylmethyl 2-methylprop-2-enoate;5-phenylpenta-2,4-dienenitrile Chemical group CC(=C)C(=O)OCC1CO1.N#CC=CC=CC1=CC=CC=C1 PFNROQCAJVOSIR-UHFFFAOYSA-N 0.000 claims description 7
- 229920001897 terpolymer Polymers 0.000 claims description 7
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000009775 high-speed stirring Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract description 8
- 229910045601 alloy Inorganic materials 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 11
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
- 238000010998 test method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 125000004185 ester group Chemical class 0.000 description 4
- 230000008676 import Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 229940083159 ethylene distearamide Drugs 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 210000001320 hippocampus Anatomy 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- -1 pentaerythritol ester Chemical class 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/05—Polymer mixtures characterised by other features containing polymer components which can react with one another
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Abstract
The invention discloses a PC/ABS rubber coating injection molding process, which comprises the following raw materials, by mass, 50-78% of polycarbonate, 20-45% of acrylonitrile-butadiene-styrene terpolymer, 0.1-0.5% of antioxidant, 0.1-1% of lubricant, 1-5% of compatilizer and 0.5-2% of epoxy resin. The PC/ABS plastic alloy prepared by the process has better aging resistance and weather resistance, high elasticity, strong impact resistance, simple process and low production cost.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a PC/ABS rubber coating injection molding process.
Background
Polycarbonate (PC) is a thermoplastic resin having high toughness, and is classified into various types, such as aliphatic, aromatic, aliphatic-aromatic, and the like, according to the structure of an ester group. The PC engineering plastic is widely applied to the fields of glass assembly industry, automobile industry, electronics and electrical appliance industry, industrial mechanical parts, medical treatment, health care, protective equipment and the like due to excellent mechanical properties.
Acrylonitrile-butadiene-styrene terpolymer (ABS) has good surface gloss and chemical resistance, tough and hard mechanical properties and good processability, and is widely applied to the fields of electric appliances, automobiles, machinery and the like.
The PC resin has poor flowing property, so that certain difficulty exists in the processing process; in addition, the PC resin has poor thermal stability due to the existence of ester group with strong polarity. The ABS resin is easy to discolor or age due to unsaturated double bonds in the system, and particularly in the environment of ultraviolet irradiation, the mechanical property of the material is seriously reduced, which becomes an important factor for limiting the wide application of the ABS resin.
The present invention is therefore directed to developing a PC/ABS overmold process to address the problems presented by the above materials.
Disclosure of Invention
In order to solve the problems, the invention provides a PC/ABS rubber coating injection molding process, which comprises the following raw materials, by mass, 50-78% of polycarbonate, 20-45% of acrylonitrile-butadiene-styrene terpolymer, 0.1-0.5% of antioxidant, 0.1-1% of lubricant, 1-5% of compatilizer and 0.5-2% of epoxy resin.
As a preferable technical scheme, the weight average molecular weight of the Polycarbonate (PC) is 10000-20000.
As a preferable technical scheme, the mass ratio of acrylonitrile to butadiene to styrene in the acrylonitrile-butadiene-styrene terpolymer (ABS) is 20-40%: 5-20%: 50-75%.
As a preferred technical scheme, the antioxidant is a mixture of an antioxidant 1010 and a light stabilizer 770.
As a preferable technical scheme, the mass ratio of the antioxidant 1010 to the light stabilizer 770 is 3-5: 5 to 7.
As a preferred embodiment, the lubricant is Ethylene Bis Stearamide (EBS).
As a preferred technical scheme, the compatilizer is styrene-acrylonitrile-glycidyl methacrylate terpolymer (SAG-001).
As a preferred technical solution, the epoxy resin is bisphenol a epoxy resin.
The second aspect of the invention also provides a PC/ABS over-molding process as described above, comprising the following steps:
s1: drying the polycarbonate raw material for 4-6h at the temperature of 110-130 ℃ to obtain dried polycarbonate; drying the raw material of the acrylonitrile-butadiene-styrene terpolymer at the temperature of 80-90 ℃ for 2-4h to obtain the dried acrylonitrile-butadiene-styrene terpolymer;
s2: placing the dried polycarbonate, the dried acrylonitrile-butadiene-styrene terpolymer, the antioxidant, the lubricant, the compatilizer and the epoxy resin into a reaction kettle according to the proportion, raising the temperature of the reaction kettle to 300 ℃ for 240 ℃ plus materials, then using a high-speed stirring dispersion machine to stir and disperse at a high speed under the condition of 800r/min plus materials and 1000r/min for 60-150 minutes, and injecting the materials into a mold after uniform dispersion;
s3: cooling and shaping in a mould;
s4: obtaining the plastic product.
As a preferred technical proposal, in step S1, the water content of the baking polycarbonate is less than 0.02%.
Has the advantages that:
1. the PC/ABS plastic alloy has stronger fluidity during preparation, so that the PC/ABS plastic alloy is easier to process;
2. the PC/ABS plastic alloy has good aging resistance and weather resistance, can be exposed outdoors for a long time, and has difficult influence on the mechanical property;
3. the PC/ABS plastic alloy has strong toughness, good high temperature resistance and low temperature resistance and is not easy to crack;
4. the PC/ABS plastic alloy has good compatibility and higher elasticity;
5. the PC/ABS plastic alloy prepared by the process has the advantages of simple process and low production cost.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
In order to solve the problems, the invention provides a PC/ABS rubber coating injection molding process, which comprises the following raw materials, by mass, 50-78% of polycarbonate, 20-45% of acrylonitrile-butadiene-styrene terpolymer, 0.1-0.5% of antioxidant, 0.1-1% of lubricant, 1-5% of compatilizer and 0.5-2% of epoxy resin.
In some preferred embodiments, the weight average molecular weight of the polycarbonate is 10000-20000, and the weight average molecular weight of the polycarbonate is 10000-20000, so that the viscosity of a high molecular weight polymer is reduced, and the flow property is improved, thereby improving the processability of the polycarbonate. Generally, when the weight average molecular weight of the polycarbonate is less than 20000, the tensile strength, impact resistance, etc. are all abruptly reduced, and in the present system, since the terminal hydroxyl or carboxyl group of the polycarbonate can react with the epoxy group of the SAG-001 side chain, chain extension of the polycarbonate is achieved, and thus the excellent mechanical properties are continued.
The polycarbonate of the present invention is selected from the group consisting of san john, su, import and export ltd.
In some preferred embodiments, the mass ratio of acrylonitrile to butadiene to styrene in the acrylonitrile-butadiene-styrene terpolymer (ABS) is 20 to 40%: 5-20%: 50-75%. The mass ratio of acrylonitrile to butadiene to styrene in the ABS plastic is regulated to be 20-40%: 5-20%: 50-80%, reduces the existence of unsaturated double bonds in the ABS plastic, and improves the aging resistance of the ABS plastic. In general, as the amount of butadiene in the ABS system is reduced, its elasticity and impact resistance are reduced, but in the present system, its elasticity and impact resistance can be improved due to the presence of polycarbonate and SAG-001. The reason is that SAG-001 backbone moieties can promote better compatibility of polycarbonate and ABS, which in turn enhances the aging resistance, elasticity and impact resistance of the PC/ABS system.
The ABS in the present invention is selected from the group consisting of dry import and export, Inc. of Longsheng, Suzhou, and can be customized according to different mass ratios.
In some preferred embodiments, the antioxidant is a mixture of antioxidant 1010 and light stabilizer 770. By selecting the mixture of the antioxidant 1010 and the light stabilizer 770 as the antioxidant, the aging resistance of a PC/ABS system can be effectively improved, so that the PC/ABS system can be exposed to an ultraviolet irradiation environment for a long time, and the mechanical property of the material cannot be suddenly reduced.
In some preferred embodiments, the mass ratio of the antioxidant 1010 to the light stabilizer 770 is 3 to 5: 5 to 7. When the mass ratio of the antioxidant 1010 to the light stabilizer 770 is 3-5: 7-5, the synergistic effect of the antioxidant 1010, the light stabilizer 770 and the PC/ABS system reaches the optimal degree, because the mass of butadiene in the ABS plastic of the system is 5-20%, and when the mass ratio of the antioxidant 1010 to the light stabilizer 770 is 3-5: within the range of 7-5, the compound can effectively remove free radicals generated by butadiene and decompose hydroperoxide, so that the aging resistance of the compound is optimal.
The CAS number of the antioxidant 1010 in the present invention is: 6683-19-8; the CAS number of the light stabilizer is: 52829-07-9.
In some preferred embodiments, the lubricant is Ethylene Bis Stearamide (EBS); by selecting EBS as a lubricant, the flow property of PC and ABS plastics is increased, so that the processability is improved; the system can also cooperate with an antioxidant 1010 and a light stabilizer 770, and the compatibility of the antioxidant 1010 and the light stabilizer 770 can be improved because EBS has a polar amide group; in addition, due to the existence of SAG-001 in the system, when the ethylene distearamide is added, the ethylene distearamide can act together with SAG-001, so that the heat resistance and weather resistance of the PC/ABS plastic are obviously improved.
The ethylene bis-stearamide (EBS) in the invention is selected from New materials science and technology Co., Ltd, east China sea, Guangdong, with CAS number of 110-30-5.
In some preferred embodiments, the compatibilizer is styrene-acrylonitrile-glycidyl methacrylate terpolymer (SAG-001); the compatibility of PC and ABS can be improved by selecting SAG-001 as a compatilizer, in the system, because polycarbonate has strong polar ester group, the polycarbonate is easy to degrade under the condition of high temperature and water, and the thermal stability is very poor, the problem can be well solved by adding SAG-001, because the epoxy group of the SAG-001 side chain can react with the terminal hydroxyl or terminal carboxyl of the polycarbonate, the density of active end groups in the polycarbonate is reduced, the probability of degradation reaction is reduced, and the thermal stability of the polycarbonate is improved.
The styrene-acrylonitrile-glycidyl methacrylate terpolymer (SAG-001) of the present invention is selected from Hippocampus materials science and technology Co.
In some preferred embodiments, the epoxy resin is a bisphenol a epoxy resin selected from the wangkin chemicals limited, jiang yin.
The second aspect of the invention also provides a PC/ABS over-molding process as described above, comprising the following steps:
s1: drying the polycarbonate raw material for 4-6h at the temperature of 110-130 ℃ to obtain dried polycarbonate; drying the raw material of the acrylonitrile-butadiene-styrene terpolymer at the temperature of 80-90 ℃ for 2-4h to obtain the dried acrylonitrile-butadiene-styrene terpolymer;
s2: placing the dried polycarbonate, the dried acrylonitrile-butadiene-styrene terpolymer, the antioxidant, the lubricant, the compatilizer and the epoxy resin into a reaction kettle according to the proportion, raising the temperature of the reaction kettle to 300 ℃ for 240 ℃ plus materials, then using a high-speed stirring dispersion machine to stir and disperse at a high speed under the condition of 800r/min plus materials and 1000r/min for 60-150 minutes, and injecting the materials into a mold after uniform dispersion;
s3: cooling and shaping in a mould;
s4: obtaining the plastic product.
As a preferable technical scheme, in step S1, the moisture content of the baked polycarbonate is less than 0.02% because the ester group in the polycarbonate is very sensitive to moisture during the processing, and is very easily degraded when the moisture content is higher than 0.02%, thereby affecting the mechanical properties of the plastic alloy.
Examples
The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples. Unless otherwise specified, all the raw materials in the present invention are commercially available.
Example 1
Embodiment 1 provides a PC/ABS encapsulation injection molding process, which comprises the following raw materials, by mass, 53% of polycarbonate, 45% of acrylonitrile-butadiene-styrene terpolymer, 0.1% of antioxidant, 0.1% of lubricant, 1% of compatilizer and 0.8% of epoxy resin.
The weight average molecular weight of the Polycarbonate (PC) was 10000.
The mass ratio of acrylonitrile to butadiene to styrene in the acrylonitrile-butadiene-styrene terpolymer (ABS) is 20%: 5%: 75 percent.
The antioxidant is a mixture of an antioxidant 1010 and a light stabilizer 770.
The mass ratio of the antioxidant 1010 to the light stabilizer 770 is 3: 5.
the lubricant is Ethylene Bis Stearamide (EBS).
The compatilizer is styrene-acrylonitrile-glycidyl methacrylate terpolymer (SAG-001).
The epoxy resin is bisphenol A epoxy resin.
The embodiment also provides the PC/ABS over-molding injection molding process, which comprises the following steps:
s1: drying the polycarbonate raw material for 6h at 110 ℃ to obtain dried polycarbonate, wherein the water content of the dried polycarbonate is 0.01%; drying the raw material of the acrylonitrile-butadiene-styrene terpolymer at 80 ℃ for 4 hours to obtain a dried acrylonitrile-butadiene-styrene terpolymer;
s2: placing the dried polycarbonate, the dried acrylonitrile-butadiene-styrene terpolymer, the antioxidant, the lubricant, the compatilizer and the epoxy resin into a reaction kettle according to the proportion, raising the temperature of the reaction kettle to 240 ℃, then using a high-speed stirring dispersion machine to stir and disperse at a high speed under the condition of 800r/min for 150 minutes, and injecting the material into a mold after uniform dispersion;
s3: cooling and shaping in a mould;
s4: obtaining the plastic product.
Example 2
Embodiment 2 provides a PC/ABS encapsulation injection molding process, which comprises the following raw materials, by mass, 72% of polycarbonate, 20% of acrylonitrile-butadiene-styrene terpolymer, 0.5% of antioxidant, 0.5% of lubricant, 5% of compatibilizer, and 2% of epoxy resin.
The weight average molecular weight of the Polycarbonate (PC) is 20000.
The mass ratio of acrylonitrile to butadiene to styrene in the acrylonitrile-butadiene-styrene terpolymer (ABS) is 30%: 20%: 50 percent.
The antioxidant is a mixture of an antioxidant 1010 and a light stabilizer 770.
The mass ratio of the antioxidant 1010 to the light stabilizer 770 is 5: 7.
the lubricant is Ethylene Bis Stearamide (EBS).
The compatilizer is styrene-acrylonitrile-glycidyl methacrylate terpolymer (SAG-001).
The epoxy resin is bisphenol A epoxy resin.
The embodiment also provides the PC/ABS over-molding injection molding process, which comprises the following steps:
s1: drying the polycarbonate raw material for 4 hours at the temperature of 130 ℃ to obtain dried polycarbonate, wherein the water content of the dried polycarbonate is 0.015%; drying the raw material of the acrylonitrile-butadiene-styrene terpolymer at 90 ℃ for 2h to obtain a dried acrylonitrile-butadiene-styrene terpolymer;
s2: placing the dried polycarbonate, the dried acrylonitrile-butadiene-styrene terpolymer, the antioxidant, the lubricant, the compatilizer and the epoxy resin into a reaction kettle according to the proportion, raising the temperature of the reaction kettle to 300 ℃, then using a high-speed stirring dispersion machine to stir and disperse at a high speed under the condition of 1000r/min for 60 minutes, and injecting the material into a mold after uniform dispersion;
s3: cooling and shaping in a mould;
s4: obtaining the plastic product.
Example 3
Embodiment 3 provides a PC/ABS encapsulation injection molding process, which comprises the following raw materials, by mass, 65% of polycarbonate, 30% of acrylonitrile-butadiene-styrene terpolymer, 0.3% of antioxidant, 0.5% of lubricant, 3% of compatibilizer, and 1.2% of epoxy resin.
The weight average molecular weight of the Polycarbonate (PC) was 15000.
The mass ratio of acrylonitrile to butadiene to styrene in the acrylonitrile-butadiene-styrene terpolymer (ABS) is 30%: 15%: 65 percent.
The antioxidant is a mixture of an antioxidant 1010 and a light stabilizer 770.
The mass ratio of the antioxidant 1010 to the light stabilizer 770 is 2: 3.
the lubricant is Ethylene Bis Stearamide (EBS).
The compatilizer is styrene-acrylonitrile-glycidyl methacrylate terpolymer (SAG-001).
The epoxy resin is bisphenol A epoxy resin.
The embodiment also provides the PC/ABS over-molding injection molding process, which comprises the following steps:
s1: drying the polycarbonate raw material for 5 hours at the temperature of 120 ℃ to obtain dried polycarbonate, wherein the water content of the dried polycarbonate is 0.005%; drying the raw material of the acrylonitrile-butadiene-styrene terpolymer at 85 ℃ for 3h to obtain the dried acrylonitrile-butadiene-styrene terpolymer;
s2: placing the dried polycarbonate, the dried acrylonitrile-butadiene-styrene terpolymer, the antioxidant, the lubricant, the compatilizer and the epoxy resin into a reaction kettle according to the proportion, raising the temperature of the reaction kettle to 270 ℃, then using a high-speed stirring disperser to stir and disperse at a high speed under the condition of 900r/min for 90 minutes, and injecting the material into a mold after uniform dispersion;
s3: cooling and shaping in a mould;
s4: obtaining the plastic product.
Comparative example 1
The weight average molecular weight of Polycarbonate (PC) was changed to 50000, which was obtained from Yu import and export, Inc., of san Jose, Suzhou, and the rest was the same as in example 3.
Comparative example 2
The mass ratio of acrylonitrile to butadiene to styrene in the acrylonitrile-butadiene-styrene terpolymer (ABS) is changed to 30%: 40%: 30% as in example 3.
Comparative example 3
The antioxidant was changed to antioxidant 1010, as in example 3.
Comparative example 4
The antioxidant was changed to light stabilizer 770, as in example 3.
Comparative example 5
The lubricant was changed to pentaerythritol ester (CAS number: 115-77-5), as in example 3.
Comparative example 5
The content of the compatibilizer was changed to zero, and the raw materials were composed of, by mass, 68% of polycarbonate, 30% of an acrylonitrile-butadiene-styrene terpolymer, 0.3% of an antioxidant, 0.5% of a lubricant, 1.2% of an epoxy resin, and the rest was the same as in example 3.
Performance test method
1. Tensile strength: tensile strength tests are carried out on the examples 1-3 and the comparative examples 1-6, the test method refers to ASTM-D638, and specific numerical values are shown in Table 1;
2. bending strength: bending strength tests are carried out on the examples 1-3 and the comparative examples 1-6, the test method refers to ASTM-D790, and specific numerical values are shown in Table 1;
3. notched impact strength: notched impact strength tests were performed on examples 1 to 3 and comparative examples 1 to 6, the test methods were according to ASTM-D256, and the specific values are shown in Table 1;
4. heat distortion temperature: carrying out heat distortion temperature test on examples 1-3 and comparative examples 1-6, wherein the test method refers to ASTM-D648, and the specific numerical values are shown in Table 1;
5. aging resistance: the aging resistance tests were conducted on examples 1 to 3 and comparative examples 1 to 6,
the test method is according to ASTM-G154, the specific numerical values are shown in Table 1;
performance test data
TABLE 1
Claims (10)
1. The PC/ABS rubber coating injection molding process is characterized by comprising, by mass, 50-78% of polycarbonate, 20-45% of acrylonitrile-butadiene-styrene terpolymer, 0.1-0.5% of antioxidant, 0.1-1% of lubricant, 1-5% of compatilizer and 0.5-2% of epoxy resin.
2. The PC/ABS over-molding process according to claim 1, wherein the weight average molecular weight of the polycarbonate is 10000 to 20000.
3. The PC/ABS rubber coating and injection molding process according to claim 1, wherein the mass ratio of acrylonitrile, butadiene and styrene in the acrylonitrile-butadiene-styrene terpolymer is 20-40%: 5-20%: 50-75%.
4. The PC/ABS overmold according to claim 1, wherein said antioxidant is a mixture of antioxidant 1010 and light stabilizer 770.
5. The PC/ABS over-molding and injection-molding process according to claim 4, wherein the mass ratio of the antioxidant 1010 to the light stabilizer 770 is 3-5: 5 to 7.
6. The PC/ABS overmold process of claim 1 wherein said lubricant is ethylene bis stearamide.
7. The PC/ABS overmold process of claim 1 wherein the compatibilizer is a styrene-acrylonitrile-glycidyl methacrylate terpolymer.
8. The PC/ABS overmold process of claim 1 wherein the epoxy resin is a bisphenol a epoxy resin.
9. The PC/ABS overmold process of any of claims 1-8, comprising the steps of:
s1: drying the polycarbonate raw material for 4-6h at the temperature of 110-130 ℃ to obtain dried polycarbonate; drying the raw material of the acrylonitrile-butadiene-styrene terpolymer at the temperature of 80-90 ℃ for 2-4h to obtain the dried acrylonitrile-butadiene-styrene terpolymer;
s2: placing the dried polycarbonate, the dried acrylonitrile-butadiene-styrene terpolymer, the antioxidant, the lubricant, the compatilizer and the epoxy resin into a reaction kettle according to the proportion, raising the temperature of the reaction kettle to 300 ℃ for 240 ℃ plus materials, then using a high-speed stirring dispersion machine to stir and disperse at a high speed under the condition of 800r/min plus materials and 1000r/min for 60-150 minutes, and injecting the materials into a mold after uniform dispersion;
s3: cooling and shaping in a mould;
s4: obtaining the plastic product.
10. The PC/ABS overmold process of claim 9 wherein said oven dried polycarbonate has a moisture content of < 0.02% in step S1.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104497527A (en) * | 2014-12-10 | 2015-04-08 | 苏州新区佳合塑胶有限公司 | Highly weather-resistant PC/ABS engineering plastic |
| CN108192267A (en) * | 2017-12-21 | 2018-06-22 | 宁波凯耀电器制造有限公司 | A kind of crack resistence PC/ABS plastic alloys and its Shooting Technique |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104497527A (en) * | 2014-12-10 | 2015-04-08 | 苏州新区佳合塑胶有限公司 | Highly weather-resistant PC/ABS engineering plastic |
| CN108192267A (en) * | 2017-12-21 | 2018-06-22 | 宁波凯耀电器制造有限公司 | A kind of crack resistence PC/ABS plastic alloys and its Shooting Technique |
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