CN106633776A - Electroplating PC/ABS alloy material suitable for door handle and preparation method of electroplating PC/ABS alloy material - Google Patents
Electroplating PC/ABS alloy material suitable for door handle and preparation method of electroplating PC/ABS alloy material Download PDFInfo
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- CN106633776A CN106633776A CN201611239165.XA CN201611239165A CN106633776A CN 106633776 A CN106633776 A CN 106633776A CN 201611239165 A CN201611239165 A CN 201611239165A CN 106633776 A CN106633776 A CN 106633776A
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- 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
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
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- Electroplating Methods And Accessories (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to an electroplating PC/ABS alloy material suitable for a door handle and a preparation method of the electroplating PC/ABS alloy material. The electroplating PC/ABS alloy material is prepared from the following components and raw materials with contents in parts by weight: 30 to 80 parts of PC resin, 70 to 20 parts of ABS resin, 5 to 10 parts of expanded graphite, 0.1 to 1 part of antioxidant and 0.1 to 1 part of lubricant. The ABS resin and the expanded graphite are blended, and then are blended and granulated through a twin screw extruder, so as to form an ABS-expanded graphite master batch, and afterwards, the PC resin, the ABS-expanded graphite master batch, the antioxidant and the lubricant are added into a mixing agitator to carry out mixing; an obtained mixture is blended and granulated through the twin screw extruder, so as to prepare the electroplating PC/ABS alloy material suitable for the door handle. The method provided by the invention is simple, easy and feasible; because of the excellent rebound resilience of the expanded graphite, the expanded graphite can be used for improving the fatigue resistance of the material; meanwhile, as the expanded graphite contains a large number of functional groups of hydroxyl and the like, a coarsening solution can easily soak the surface of a work piece during electroplating; the quite good electroplating yield is obtained.
Description
Technical field
The present invention relates to field of polymer technology, more particularly, to a kind of suitable door handle with plating PC/ABS alloy materials and its
Preparation method.
Background technology
Plating PC/ABS alloy materials are wide due to its excellent heat resistance, toughness and endurance life and plating performance
It is general application with automobile interior exterior trim on, such as inside and outside catch, vehicle nameplate, wheel clamshell, grid, ornamental strip.Door handle
Due to needing to experience folding fatigue tests up to ten thousand when in use, very high fatigue performance is proposed to material.For fatigue
The occasion having high demands, just selects plating nylon to meet requirement.But the yields of nylon plating is low, plating nylon is limited
Use.
Chinese patent CN103059547B discloses a kind of plating PC/ABS alloy materials and preparation method thereof, comprising 30-
70 weight part polycarbonates, 40-60 parts by weight of styrene-hycar, 5-30 parts by weight of styrene-propylene
Lonitrile copolymer, 5-30 weight parts of butadiene class graft rubbers, 1-3 parts by weight of compatible agent, 1-10 weight portion heat-proof modifiers, 0.5-
1 weight portion processing aid.Although the patent can prepare the plating level PC/ABS alloy material of high heat-resisting, high flowing,
It is that its fatigue durability, plating yields and plating adhesion need to be improved.
The content of the invention
The purpose of the present invention is exactly the defect in order to overcome above-mentioned prior art to exist and provides a kind of with high endurance
Property, the high suitable door handle of high plating yields, high plating adhesion be adapted to door handle electricity consumption with plating PC/ABS alloy materials
The preparation method of plating PC/ABS alloy materials.
It is a further object to provide
The purpose of the present invention can be achieved through the following technical solutions:
A kind of suitable door handle plating PC/ABS alloy materials, including the raw material of following components and weight portion content:
PC resin 30~80, ABS resin 70~20, expanded graphite 5~10, antioxidant 0.1~1, lubricant 0.1~1.
Described expanded graphite particle diameter is 10~500nm, and particle diameter is easily caused greatly very much electroplated product pit, electroplates yield
Low, particle diameter is too little, is unfavorable for the raising of endurance life and plating adhesion.
Preferably, expanded graphite particle diameter is 200~300nm.
The relative molecular weight of described PC resin is 20000~40000.
Described ABS resin is the graft copolymer of acrylonitrile-butadiene-styrene (ABS) composition, and relative molecular weight is
130000~250000, particle diameter is 0.1~1 μm, and wherein butadiene, acrylonitrile, cinnamic mass ratio are 10~60:15~
32:20~40.
Described antioxidant be triethylene-glycol double [β-(3- tertiary butyl-4-hydroxy -5- aminomethyl phenyls) propionic ester], four
[β-(3,5- di-t-butyl 4- hydroxy phenyls) propionic acid] pentaerythritol ester, three (2,4- di-tert-butyl-phenyl) phosphite esters or double ten
The mixing of one or more in eight alkylol pentaerythritol diphosphites.
Described lubricant is silane polymer, solid paraffin, atoleine, soap, calcium stearate fatty acid acyl
The mixing of one or more in amine, calcium stearate, zinc stearate or stearic amide.
The suitable door handle preparation method for electroplating PC/ABS alloy materials, using following steps:
A, particle will be caused by double screw extruder blending after ABS resin, expanded graphite blending, and form ABS- and expand stone
Black master batch;
B, ABS- expanded graphites master batch and PC resin by obtained by step a, antioxidant and lubricant add mixing and blending machine
In mixed;Gained mixture is granulated by double screw extruder blending, the plating PC/ of suitable door handle is obtained
ABS alloy material.
The barrel zone temperature of described double screw extruder is 200~260 DEG C, and screw speed is 200~600rpm.
Expanded graphite be by natural graphite scale Jing intercalations, washing, drying, high temperature puffing obtain it is a kind of loose porous
Vermiform material.Expanded graphite in addition to the premium properties such as the cold-hot that possesses native graphite itself, also with native graphite
The characteristics such as unexistent softness, compression resilience, its high specific surface area also gives it and contains the functional groups such as substantial amounts of hydroxyl,
So that good hydrophilic property.
After expanded graphite and ABS resin melting mixing, resin enters the intercalation of expanded graphite, the nano flake of expanded graphite
Polymer is wrapped up, isolated, and can obtain good dispersion.It is excellent that the compression resilience of expanded graphite itself causes material to obtain
Different fatigue performance.
There are the hydrophilic functional groups such as substantial amounts of hydroxyl on expanded graphite surface so that coarsening solution easily infiltrates during plating roughening
Surface, is roughened influential effect plating yields, also have impact on plating adhesion.
Compared with prior art, the present invention is simple, and expanded graphite can improve material due to its excellent resilience
Fatigue performance, simultaneously because expanded graphite contains the functional groups such as substantial amounts of hydroxyl so that when plating, roughening liquid energy is easy
Infiltration article surface, obtains plating yields well and high plating adhesion.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, some deformations and improvement can also be made.These belong to the present invention
Protection domain.
The weight average molecular weight of the PC selected in following examples and comparative example is 40,000, and the molecular weight of ABS resin is
130,000, particle diameter is 400nm, and the particle diameter that expanded graphite 1 is selected is 200nm;The particle diameter that expanded graphite 2 is selected is 700nm;It is anti-
Oxygen agent is the Irganox 1076 and Irganox 168 of Ciba companies, and its weight ratio is 1:1;Lubricant is commercially available Ji Wusi
Alcohol stearic acid.
Comparative example 1
Plating PC/ABS alloy materials of a kind of suitable door handle and preparation method thereof, the method is comprised the following steps:
(1) each component is weighed by weight:PC:30,ABS:70, antioxidant 1010 0.1, irgasfos 168 0.1, lubrication
Agent 0.3
(2) (a) all raw materials are added and is mixed in mixing and blending machine;B () is by step a gained mixture by double spiral shells
The blending granulation of bar extruder, extrusion temperature is 260 DEG C, and through melting extrusion, granulation obtains product.
Comparative example 2
Plating PC/ABS alloy materials of a kind of suitable door handle and preparation method thereof, the method is comprised the following steps:
(1) each component is weighed by weight:PC:70,ABS:20, expanded graphite 2:10, antioxidant 1010 0.1, antioxidant
168 0.1, lubricant 0.3
(2) (a) all raw materials are added and is mixed in mixing and blending machine;B () is by step a gained mixture by double spiral shells
The blending granulation of bar extruder, extrusion temperature is 260 DEG C, and through melting extrusion, granulation obtains product.
Embodiment 1
Plating PC/ABS alloy materials of a kind of suitable door handle and preparation method thereof, the method is comprised the following steps:
(1) each component is weighed by weight:PC:50,ABS:40, expanded graphite 1:10;Antioxidant 1010 0.1, antioxidant
168 0.1, lubricant 0.3
(2) (a) particle will be caused by double screw extruder blending after ABS resin, expanded graphite blending, forms ABS- swollen
Swollen graphite master batch;(b) by the ABS- expanded graphite master batches obtained by step a, PC resin, antioxidant and lubricant add mixing to stir
Mix in machine and mixed;Gained mixture is granulated by double screw extruder blending, extrusion temperature is 260 DEG C, through melting
Extrusion, granulation obtains product.
Embodiment 2
Plating PC/ABS alloy materials of a kind of suitable door handle and preparation method thereof, the method is comprised the following steps:
(1) each component is weighed by weight:PC:70,ABS:20, expanded graphite 1:10;Antioxidant 1010 0.1, antioxidant
168 0.1, lubricant 0.3
(2) (a) particle will be caused by double screw extruder blending after ABS resin, expanded graphite blending, forms ABS- swollen
Swollen graphite master batch;(b) by the ABS- expanded graphite master batches obtained by step a, PC resin, antioxidant and lubricant add mixing to stir
Mix in machine and mixed;Gained mixture is granulated by double screw extruder blending, extrusion temperature is 260 DEG C, through melting
Extrusion, granulation obtains product.
Embodiment 3
Plating PC/ABS alloy materials of a kind of suitable door handle and preparation method thereof, the method is comprised the following steps:
(1) each component is weighed by weight:PC:60,ABS:35, expanded graphite 1:5;Antioxidant 1010 0.1, antioxidant
168 0.1, lubricant 0.3
(2) (a) particle will be caused by double screw extruder blending after ABS resin, expanded graphite blending, forms ABS- swollen
Swollen graphite master batch;(b) by the ABS- expanded graphite master batches obtained by step a, PC resin, antioxidant and lubricant add mixing to stir
Mix in machine and mixed;Gained mixture is granulated by double screw extruder blending, extrusion temperature is 260 DEG C, through melting
Extrusion, granulation obtains product.
Embodiment 4
Plating PC/ABS alloy materials of a kind of suitable door handle and preparation method thereof, the method is comprised the following steps:
(1) each component is weighed by weight:PC:30,ABS:62, expanded graphite 1:8;Antioxidant 1010 0.1, antioxidant
168 0.1, lubricant 0.3
(2) (a) particle will be caused by double screw extruder blending after ABS resin, expanded graphite blending, forms ABS- swollen
Swollen graphite master batch;(b) by the ABS- expanded graphite master batches obtained by step a, PC resin, antioxidant and lubricant add mixing to stir
Mix in machine and mixed;Gained mixture is granulated by double screw extruder blending, extrusion temperature is 260 DEG C, through melting
Extrusion, granulation obtains product.
Embodiment 5
Implementation result
The high tabula rasa of 140mm*90mm*3mm is molded into, Electroplate Factory's plating in Shanghai.In the coarsening solution of plating, the concentrated sulfuric acid
400g/L is with the concentration of chromic acid, Coarsening Temperature is 68 DEG C, coarsening time 13min.
Plating adhesion is carried out according to GMW14668-2010 standards, and draw speed is 100mm/min, and angle is 90 °;
Notch impact strength is carried out according to ASTM D256 standards, and temperature is 23 DEG C.
Fatigue performance is tested:The batten of 100mm*10mm*3mm is molded into, applies bending middle, until power reaches
50N, is then back to.Do so fatigue test.
Test result is as shown in table 1:
The product coarsening time and test result of the embodiment of table 1 and comparative example
As shown in Table 1, embodiment 1 has excellent impact property, and fatigue durability is good, and plating adhesion and qualification rate are all non-
Chang Gao.Expanded graphite can improve the fatigue performance of material due to its excellent resilience, simultaneously because expanded graphite contains greatly
The functional groups such as the hydroxyl of amount so that when plating, roughening liquid energy easily infiltrates article surface, obtains plating yields well
With high plating adhesion.Tens thousand of time foldings are needed when door handle is used, the fatigue performance of material is proposed it is very high will
Ask.Therefore this alloy material is more suitable for door handle.
Embodiment 6
A kind of suitable door handle plating PC/ABS alloy materials, including the raw material of following components and weight portion content:PC
Resin 30, ABS resin 70, expanded graphite 5, antioxidant 0.1, lubricant 0.1.
For 10nm, particle diameter is easily caused greatly very much electroplated product pit to the expanded graphite particle diameter for adopting, and plating yield is low, particle diameter
It is too little, it is unfavorable for the raising of endurance life and plating adhesion.The relative molecular weight of PC resin is 20000.ABS resin is third
The graft copolymer of alkene nitrile-butadiene-styrene composition, relative molecular weight is 130000, and particle diameter is 0.1 μm, wherein butadiene,
Acrylonitrile, cinnamic mass ratio are 10:15:20.Antioxidant is the double [β-(3- tertiary butyl-4-hydroxy -5- of triethylene-glycol
Aminomethyl phenyl) propionic ester], lubricant is solid paraffin.
The suitable door handle preparation method for electroplating PC/ABS alloy materials, using following steps:
A, will ABS resin, expanded graphite blending after by double screw extruder be blended cause particle, double screw extruder
Barrel zone temperature is 200 DEG C, and screw speed is 200rpm, forms ABS- expanded graphite master batches;
B, ABS- expanded graphites master batch and PC resin by obtained by step a, antioxidant and lubricant add mixing and blending machine
In mixed;Gained mixture is granulated by double screw extruder blending, the barrel zone temperature of double screw extruder is 220
DEG C, screw speed is obtained the plating PC/ABS alloy materials of suitable door handle for 300rpm.
Embodiment 7
A kind of suitable door handle plating PC/ABS alloy materials, including the raw material of following components and weight portion content:PC
Resin 35, ABS resin 65, expanded graphite 8, antioxidant 0.5, lubricant 0.5.
Expanded graphite particle diameter is 300nm, and particle diameter is easily caused greatly very much electroplated product pit, and plating yield is low, and particle diameter is too little,
It is unfavorable for the raising of endurance life and plating adhesion.The relative molecular weight of PC resin is 30000.ABS resin be acrylonitrile-
The graft copolymer of butadiene-styrene composition, relative molecular weight is 180000, and particle diameter is 0.6 μm, wherein butadiene, propylene
Nitrile, cinnamic mass ratio are 20:25:33.Antioxidant is the double [β-(3- tertiary butyl-4-hydroxy -5- methyl of triethylene-glycol
Phenyl) propionic ester], the mixture of four [β-(3,5- di-t-butyl 4- hydroxy phenyls) propionic acid] pentaerythritol esters.Lubricant is hard
Resin acid calcium fatty acid amide, calcium stearate, the mixture of zinc stearate.
The suitable door handle preparation method for electroplating PC/ABS alloy materials, using following steps:
A, will ABS resin, expanded graphite blending after by double screw extruder be blended cause particle, double screw extruder
Barrel zone temperature is 230 DEG C, and screw speed is 400rpm, forms ABS- expanded graphite master batches;
B, ABS- expanded graphites master batch and PC resin by obtained by step a, antioxidant and lubricant add mixing and blending machine
In mixed;Gained mixture is granulated by double screw extruder blending, the barrel zone temperature of double screw extruder is 240
DEG C, screw speed is 500rpm, and the plating PC/ABS alloy materials of suitable door handle are obtained.
Embodiment 8
A kind of suitable door handle plating PC/ABS alloy materials, including the raw material of following components and weight portion content:PC
Resin 80, ABS resin 20, expanded graphite 10, antioxidant 1, lubricant 1.
Expanded graphite particle diameter is 500nm, and particle diameter is easily caused greatly very much electroplated product pit, and plating yield is low, and particle diameter is too little,
It is unfavorable for the raising of endurance life and plating adhesion.The relative molecular weight of PC resin is 40000.ABS resin be acrylonitrile-
Butadiene-styrene composition graft copolymer, relative molecular weight is 250000, particle diameter be 1 μm, wherein butadiene, acrylonitrile,
Cinnamic mass ratio is 60:32:40.Antioxidant is double stearyl alcohol pentaerythritol diphosphites, and lubricant is tristearin
Sour acid amides.
The suitable door handle preparation method for electroplating PC/ABS alloy materials, using following steps:
A, will ABS resin, expanded graphite blending after by double screw extruder be blended cause particle, double screw extruder
Barrel zone temperature is 260 DEG C, and screw speed is 600rpm, forms ABS- expanded graphite master batches;
B, ABS- expanded graphites master batch and PC resin by obtained by step a, antioxidant and lubricant add mixing and blending machine
In mixed;Gained mixture is granulated by double screw extruder blending, the barrel zone temperature of double screw extruder is 260
DEG C, screw speed is 600rpm, and the plating PC/ABS alloy materials of suitable door handle are obtained.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can within the scope of the claims make various modifications or modification, this not shadow
Ring the flesh and blood of the present invention.
Claims (8)
1. a kind of suitable door handle is used and electroplates PC/ABS alloy materials, it is characterised in that including following components and weight portion content
Raw material:
PC resin 30~80, ABS resin 70~20, expanded graphite 5~10, antioxidant 0.1~1, lubricant 0.1~1.
2. a kind of suitable door handle according to claim 1 is used and electroplates PC/ABS alloy materials, it is characterised in that described
Expanded graphite particle diameter is 10~500nm, preferably 200~300nm.
3. a kind of suitable door handle according to claim 1 is used and electroplates PC/ABS alloy materials, it is characterised in that described
The relative molecular weight of PC resin is 20000~40000.
4. a kind of suitable door handle according to claim 1 is used and electroplates PC/ABS alloy materials, it is characterised in that described
ABS resin is the graft copolymer of acrylonitrile-butadiene-styrene (ABS) composition, and relative molecular weight is 130000~250000, particle diameter
For 0.1~1 μm, wherein butadiene, acrylonitrile, cinnamic mass ratio are 10~60:15~32:20~40.
5. a kind of suitable door handle according to claim 1 is used and electroplates PC/ABS alloy materials, it is characterised in that described
Antioxidant is triethylene-glycol double [β-(3- tertiary butyl-4-hydroxy -5- aminomethyl phenyls) propionic ester], four [β-(3,5- bis- tertiary fourths
Base 4- hydroxy phenyls) propionic acid] pentaerythritol ester, three (2,4- di-tert-butyl-phenyl) phosphite esters or double stearyl alcohols Ji Wusi
The mixing of one or more in alcohol diphosphites.
6. a kind of suitable door handle according to claim 1 is used and electroplates PC/ABS alloy materials, it is characterised in that described
Lubricant is silane polymer, solid paraffin, atoleine, soap, calcium stearate fatty acid amide, calcium stearate, hard
The mixing of one or more in resin acid zinc or stearic amide.
7. it is as claimed in claim 1 to be adapted to the door handle preparation method for electroplating PC/ABS alloy materials, it is characterised in that should
Method adopts following steps:
A, particle will be caused by double screw extruder blending after ABS resin, expanded graphite blending, form ABS- expanded graphites mother
Grain;
B, ABS- expanded graphites master batch and PC resin by obtained by step a, antioxidant and lubricant are added and entered in mixing and blending machine
Row mixing;Gained mixture is granulated by double screw extruder blending, the plating PC/ABS that suitable door handle is obtained is closed
Golden material.
8. a kind of suitable door handle use according to claim 7 electroplates the preparation method of PC/ABS alloy materials, its feature
It is that the barrel zone temperature of described double screw extruder is 200~260 DEG C, and screw speed is 200~600rpm.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108950611A (en) * | 2018-07-02 | 2018-12-07 | 宁波帅特龙集团有限公司 | Attacker and preparation method thereof in a kind of car door |
CN111440429A (en) * | 2020-04-13 | 2020-07-24 | 金发科技股份有限公司 | PC/ABS alloy material and preparation method and application thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000063619A (en) * | 1998-08-26 | 2000-02-29 | Sekisui Chem Co Ltd | Fire-retardant resin composition |
CN103059547A (en) * | 2013-01-30 | 2013-04-24 | 上海俊尔新材料有限公司 | Electroplating PC/ABS (polycarbonate/acrylonitrile-butadiene-styrene) alloy material and preparation method thereof |
CN104231534A (en) * | 2014-10-13 | 2014-12-24 | 苏州高通新材料科技有限公司 | Plastic electroplated part and preparation method thereof |
-
2016
- 2016-12-28 CN CN201611239165.XA patent/CN106633776B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000063619A (en) * | 1998-08-26 | 2000-02-29 | Sekisui Chem Co Ltd | Fire-retardant resin composition |
CN103059547A (en) * | 2013-01-30 | 2013-04-24 | 上海俊尔新材料有限公司 | Electroplating PC/ABS (polycarbonate/acrylonitrile-butadiene-styrene) alloy material and preparation method thereof |
CN104231534A (en) * | 2014-10-13 | 2014-12-24 | 苏州高通新材料科技有限公司 | Plastic electroplated part and preparation method thereof |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108950611A (en) * | 2018-07-02 | 2018-12-07 | 宁波帅特龙集团有限公司 | Attacker and preparation method thereof in a kind of car door |
CN111440429A (en) * | 2020-04-13 | 2020-07-24 | 金发科技股份有限公司 | PC/ABS alloy material and preparation method and application thereof |
CN111440429B (en) * | 2020-04-13 | 2022-03-29 | 金发科技股份有限公司 | PC/ABS alloy material and preparation method and application thereof |
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