CN108623981B - Acrylonitrile-butadiene-styrene composition for solving spraying-free flow mark and preparation method thereof - Google Patents
Acrylonitrile-butadiene-styrene composition for solving spraying-free flow mark and preparation method thereof Download PDFInfo
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- CN108623981B CN108623981B CN201710185635.7A CN201710185635A CN108623981B CN 108623981 B CN108623981 B CN 108623981B CN 201710185635 A CN201710185635 A CN 201710185635A CN 108623981 B CN108623981 B CN 108623981B
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/068—Ultra high molecular weight polyethylene
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Abstract
The invention discloses an acrylonitrile-butadiene-styrene composition for solving spraying-free flow marks and a preparation method thereof, wherein the composition comprises acrylonitrile-butadiene-styrene resin: 82-97.25 parts of light stabilizer: 0.5-2 parts of a heat stabilizer: 0.1-2 parts of chemical treatment agent: 2-10 parts of a processing aid: 0.1-2 parts of metal powder pigment: 0.05-2 parts. The invention creatively provides a solution of a new thought technical route from the material aspect, and the spraying-free metal effect acrylonitrile-butadiene-styrene composition is used for a workpiece produced by injection molding processing, so that the defect of flow mark defects on the appearance of the workpiece is completely eliminated, the appearance quality of the product is greatly improved, the defective injection molding rate is reduced, and considerable benefits are brought to production.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to an acrylonitrile-butadiene-styrene composition for solving surface flow mark flaws of a spraying-free material workpiece and a preparation method thereof.
Background
The spraying-free thermoplastic engineering plastic aims at providing the material with the effect of metal appearance in the material preparation stage, so that the technical link of spraying the appearance of a workpiece again in the later stage is eliminated, the production cost is reduced, the development period is shortened, and the environment-friendly purpose of reducing pollutants such as toxic and harmful gases generated to the environment in the spraying process can be achieved.
However, it has been found in practice that spray-free engineering thermoplastic injection-molded parts have more or less flow mark defects in appearance, which greatly impairs the appearance quality of the product. To solve this problem, engineers and technicians have also made a lot of research work in this respect, and the problem has not been solved effectively.
Disclosure of Invention
In order to solve the technical defects, the invention aims to provide an acrylonitrile-butadiene-styrene composition for solving the flow mark defect on the surface of a spraying-free material workpiece and a preparation method thereof. The invention creatively provides a solution of a new thought technical route from the material aspect, the spraying-free metal effect of the invention utilizes the acrylonitrile-butadiene-styrene composition to produce the finished piece by injection molding, the defect of flow mark and flaw on the appearance of the finished piece is completely eliminated, the appearance quality of the product is greatly improved, the defective rate of injection molding is reduced, and considerable benefits are brought to production.
In order to achieve the purpose, the invention adopts the following technical scheme:
an acrylonitrile-butadiene-styrene composition for solving the spraying-free flow mark is prepared from the following components in parts by weight:
acrylonitrile-butadiene-styrene resin: 82 to 97.25 portions of the total weight of the emulsion,
light stabilizer: 0.5 to 2 parts by weight of a stabilizer,
thermal stabilizer: 0.1 to 2 parts by weight of a stabilizer,
chemical treatment agent: 2 to 10 portions of
Processing aid: 0.1 to 2 parts by weight of a stabilizer,
metal powder pigment: 0.05-2 parts.
Further, the acrylonitrile-butadiene-styrene resin is selected from one or a mixture of a plurality of acrylonitrile-butadiene-styrene graft copolymer, acrylonitrile-ethylene propylene elastomer-styrene graft copolymer, acrylonitrile-styrene-acrylic acid terpolymer and methyl methacrylate-butadiene-styrene graft copolymer.
Further, the acrylonitrile-butadiene-styrene is produced by a bulk method, and the relative density of the acrylonitrile-butadiene-styrene is 1.04-1.07 g/cm3Melt mass flow rate at test conditions of 220 ℃ at 10 kgIs 2 to 10g/10min or more.
Further, the light stabilizer is selected from one or a mixture of more of benzophenone light stabilizer, benzotriazole light stabilizer and hindered amine light stabilizer for compounding.
Further, the heat stabilizer is one or a mixture of more of hindered phenol heat stabilizer, thioester heat stabilizer and phosphite heat stabilizer.
Further, the chemical treatment agent is an ultrahigh molecular weight thermoplastic resin with the molecular weight of more than 150 ten thousand.
Further, the processing aid is selected from one or a mixture of more of solid paraffin, liquid paraffin, low molecular weight polyethylene, stearic acid amide and methylene bis stearic acid amide.
Further, the metal powder pigment is selected from one or a mixture of several of aluminum powder, silver powder, iron powder, nickel powder and zinc powder, and is flaky and has a particle size of 1-900 um.
A preparation method of a resin composition for solving the problem of spraying-free flow marks is characterized by comprising the following steps: the method comprises the following steps of,
(1) weighing raw materials of each component, and uniformly mixing 82-97.25 parts of acrylonitrile-butadiene-styrene resin, 0.5-2 parts of light stabilizer, 0.1-2 parts of heat stabilizer, 2-10 parts of chemical treatment agent, 0.1-2 parts of processing aid and 0.05-2 parts of metal powder pigment to obtain a mixed material;
(2) feeding the mixed material obtained in the step (1) into a double-screw extruder, fully melting and compounding the material under the conveying and shearing action of a screw, and then extruding, bracing, cooling and granulating the material by a machine head; the screw temperature of a first zone of the double-screw extruder is 200-220 ℃; the temperature of the screw from the second area to the machine head is 220-260 ℃; the rotating speed of the screw is 150 to 500 r/min.
Compared with the prior art, the invention has the following advantages:
1. according to the acrylonitrile-butadiene-styrene composition for solving the spraying-free flow mark, the high-viscosity low-melting-point resin material is adopted, and the ultrahigh-molecular-weight thermoplastic resin is used for modification, so that the composition melt can flow in a stable state, the flow speed of the front edge of the melt is stable, and the injection effect of a narrow flow channel and a gate entering a wide die cavity is reduced; meanwhile, as the melt of the composition has larger molecular weight and viscosity, the metal powder pigment can be better driven to flow together when flowing, and more metal powder pigment is coated in the front flowing edge of the melt, thereby eliminating the appearance defect of flow mark defects on spraying-free thermoplastic engineering plastic injection molded parts.
2. The selection of the composition base material is definitely different from the previous selection thought of acrylonitrile-butadiene-styrene base material, the thought of the prior technical personnel for solving the injection molding flow marks is started from the improvement of the fluidity of the melt, but the invention adopts the solution scheme of selecting the high-viscosity resin with low melt index and low fluidity from the reverse thought, improves the success rate of material development, greatly improves the appearance quality of products, reduces the defective rate of injection molding, and brings considerable benefits for production.
3. The invention adopts the chemical treatment agent which is the ultrahigh molecular weight thermoplastic resin with the molecular weight more than 150 ten thousand, reduces the unstable state of injection molding and shifts to the stable state.
4. Because a new solution idea is adopted, low-melting-index and fluidity resin is selected and compounded with high-molecular-weight resin, so that the overall fluidity of the composition is reduced, and the molecular weight is increased, the melt can flow in a more balanced mode during flowing and mold filling, and the injection defect caused by sudden speed fluctuation and enlargement of the melt due to high fluidity is avoided; meanwhile, the metal powder pigment is coated in the flow front edge of the melt, the problem of flow mark defects existing in the spraying-free thermoplastic engineering plastic used for injection molding is fundamentally solved from the material end, the influence of factors such as a mold, a pouring gate, structural design and the like is not needed to be considered, and the development cost is reduced.
Detailed Description
The present invention is further illustrated by the following specific examples.
The raw materials used in the following examples were:
the acrylonitrile-butadiene-styrene resin is PA-709 which is Qimei in Taiwan.
The light stabilizer is compounded by UV-531 and LA-292 in chemical industry of Changchun (weight ratio of UV-531: LA-292: 3: 2).
The heat stabilizer is composed of hindered phenol (AO-50 in Vinca chemical industry) and phosphite (2112 in Vinca chemical industry) (weight ratio AO-50: 2112 is 1: 2).
The chemical treatment agent is UHMWPE of M2 brand produced by Beijing assistant II factory.
The processing aid is domestic commercial EBS.
The metal powder pigment is aluminum silver powder produced in the domestic Sanbao chemical industry, is flaky and has a particle size of 18 um.
The acrylonitrile-butadiene-styrene composition for solving the spraying-free flow mark provided by the embodiment of the invention is injected into a sample workpiece with the thickness of 165mm multiplied by 215mm multiplied by 2.5mm, the degree of the flow mark on the surface of the workpiece and the brightness of the metal effect on the surface of the workpiece are detected, and the judgment definition is shown in tables 1 and 2.
TABLE 1 definition of flow mark rating on the surface of the part
TABLE 2 definition of determination of brightness of metallic effect on the surface of a workpiece
Example 1
82 parts of Qimei PA-709, 2 parts of light stabilizer, 2 parts of heat stabilizer, 10 parts of chemical treatment agent, 2 parts of processing aid and 2 parts of aluminum silver powder are stirred and mixed uniformly at a high speed, the mixture is fed into a double-screw extruder, and is fully melted and compounded under the conveying and shearing action of a screw, and then is extruded, pulled into strips, cooled and cut into granules through a die of a machine head.
The temperature of the first zone of the double-screw extruder is controlled to be 200 ℃, the temperature of the screws from the second zone to each section of the extruder head is controlled to be 220-260 ℃, and the rotating speed of the screws is 350 r/min.
And (3) injection molding to obtain a test sample plate workpiece, and detecting the degree of flow marks on the surface of the workpiece and the brightness of the metal effect on the surface of the workpiece, wherein the results are shown in Table 3.
Comparative example 1
92 parts of Qimei PA-709, 2 parts of a light stabilizer, 2 parts of a heat stabilizer, 2 parts of a processing aid and 2 parts of aluminum silver powder are stirred at a high speed and mixed uniformly, the mixture is fed into a double-screw extruder, is fully melted and compounded under the conveying and shearing action of a screw, and is extruded, pulled into strips, cooled and cut into granules through a die of a machine head.
The temperature of the first zone of the double-screw extruder is controlled to be 200 ℃, the temperature of the screws from the second zone to each section of the extruder head is controlled to be 220-260 ℃, and the rotating speed of the screws is 350 r/min.
And (3) injection molding to obtain a test sample plate workpiece, and detecting the degree of flow marks on the surface of the workpiece and the brightness of the metal effect on the surface of the workpiece, wherein the results are shown in Table 3.
Example 2
Mixing 90 parts of Qimei PA-709, 1 part of a light stabilizer, 1 part of a heat stabilizer, 6 parts of a chemical treatment agent, 1 part of a processing aid and 1 part of aluminum silver powder uniformly by high-speed stirring, feeding the mixture into a double-screw extruder, fully melting and compounding under the conveying and shearing action of a screw, extruding through a die of a machine head, bracing, cooling and granulating.
The temperature of the first zone of the double-screw extruder is controlled to be 200 ℃, the temperature of the screws from the second zone to each section of the extruder head is controlled to be 220-260 ℃, and the rotating speed of the screws is 350 r/min.
And (3) injection molding to obtain a test sample plate workpiece, and detecting the degree of flow marks on the surface of the workpiece and the brightness of the metal effect on the surface of the workpiece, wherein the results are shown in Table 3.
Comparative example 2
90 parts of domestic Daqing ABS750, 1 part of light stabilizer, 1 part of heat stabilizer, 6 parts of chemical treatment agent, 1 part of processing aid and 1 part of aluminum silver powder are stirred and mixed uniformly at a high speed, the mixture is fed into a double-screw extruder, is fully melted and compounded under the conveying and shearing action of a screw, and is extruded, pulled into strips, cooled and cut into granules through a die of a machine head.
The temperature of the first zone of the double-screw extruder is controlled to be 200 ℃, the temperature of the screws from the second zone to each section of the extruder head is controlled to be 220-260 ℃, and the rotating speed of the screws is 350 r/min.
And (3) injection molding to obtain a test sample plate workpiece, and detecting the degree of flow marks on the surface of the workpiece and the brightness of the metal effect on the surface of the workpiece, wherein the results are shown in Table 3.
Example 3
97.25 parts of Qimei PA-709, 0.5 part of light stabilizer, 0.1 part of heat stabilizer, 2 parts of chemical treatment agent, 0.1 part of processing aid and 0.05 part of aluminum silver powder are stirred and mixed uniformly at a high speed, the mixture is sent into a double-screw extruder, is fully melted and compounded under the conveying and shearing action of a screw, and is extruded through a die of a machine head, pulled into strips, cooled and cut into granules.
The temperature of the first zone of the double-screw extruder is controlled to be 200 ℃, the temperature of the screws from the second zone to each section of the extruder head is controlled to be 220-260 ℃, and the rotating speed of the screws is 350 r/min.
And (3) injection molding to obtain a test sample plate workpiece, and detecting the degree of flow marks on the surface of the workpiece and the brightness of the metal effect on the surface of the workpiece, wherein the results are shown in Table 3.
TABLE 3 test results of surface appearance effect of the fabricated parts
The acrylonitrile-butadiene-styrene composition prepared by the embodiment can be used for solving the flow mark defect on the surface of the spraying-free material workpiece, so that the workpiece appearance flow mark is obviously weakened, and the metal effect is obviously improved. It is seen from example 1 and comparative example 1 in Table 3 that the melt viscosity of the composition of the present invention is stable and the flow marks on the appearance of the injection-molded article are completely eliminated after the chemical treatment agent is used. Example 2 and comparative example 2 show that the use of the acrylonitrile-butadiene-styrene composition of the invention significantly eliminates the flow marks on the appearance of the parts. In examples 1, 2 and 3, it is seen that the stability of the composition is improved, the flow marks on the surface of a workpiece are effectively eliminated, and the metal effect is enhanced by using the novel chemical treatment agent and the acrylonitrile-butadiene-styrene base material which is different from the traditional high-fluidity base material and the high-viscosity low-melting-index base material.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (7)
1. An acrylonitrile-butadiene-styrene composition for solving the spraying-free flow mark is characterized in that: the composition is prepared from the following components in parts by weight:
acrylonitrile-butadiene-styrene resin: 82 to 97.25 portions of the total weight of the emulsion,
light stabilizer: 0.5 to 2 parts by weight of a stabilizer,
thermal stabilizer: 0.1 to 2 parts by weight of a stabilizer,
chemical treatment agent: 2 to 10 portions of
Processing aid: 0.1 to 2 parts by weight of a stabilizer,
metal powder pigment: 0.05-2 parts of a stabilizer;
the acrylonitrile-butadiene-styrene resin is produced by a bulk method, and the relative density of the acrylonitrile-butadiene-styrene resin is 1.04-1.07 g/cm3Under the test conditions of 220 ℃ and 10 kg of the melt, the melt mass flow rate is 2-10 g/10 min;
the chemical treatment agent is ultrahigh molecular weight thermoplastic resin with the molecular weight of more than 150 ten thousand.
2. The acrylonitrile-butadiene-styrene composition for solving the spray-free flow mark as claimed in claim 1, wherein: the acrylonitrile-butadiene-styrene resin is selected from one or a mixture of a plurality of acrylonitrile-butadiene-styrene graft copolymer, acrylonitrile-ethylene propylene elastomer-styrene graft copolymer, acrylonitrile-styrene-acrylic acid terpolymer and methyl methacrylate-butadiene-styrene graft copolymer.
3. The acrylonitrile-butadiene-styrene composition for solving the spray-free flow mark as claimed in claim 1, wherein: the light stabilizer is selected from one or a mixture of more of benzophenone light stabilizer, benzotriazole light stabilizer and hindered amine light stabilizer for compounding.
4. The acrylonitrile-butadiene-styrene composition for solving the spray-free flow mark as claimed in claim 1, wherein: the heat stabilizer is one or a mixture of more of hindered phenol heat stabilizer, thioester heat stabilizer and phosphite heat stabilizer.
5. The acrylonitrile-butadiene-styrene composition for solving the spray-free flow mark as claimed in claim 1, wherein: the processing aid is selected from one or a mixture of more of solid paraffin, liquid paraffin, low molecular weight polyethylene, stearic acid amide and methylene bis-stearic acid amide.
6. The acrylonitrile-butadiene-styrene composition for solving the spray-free flow mark as claimed in claim 1, wherein: the metal powder pigment is selected from one or a mixture of more of aluminum powder, silver powder, iron powder, nickel powder and zinc powder, and is flaky and has a particle size of 1-900 microns.
7. The method for preparing the acrylonitrile-butadiene-styrene composition for solving the spray flow mark-free according to any one of claims 1 to 6, wherein: the method comprises the following steps of,
(1) weighing the raw materials of the components according to the parts by weight of claim 1, and uniformly mixing 82-97.25 parts of acrylonitrile-butadiene-styrene resin, 0.5-2 parts of light stabilizer, 0.1-2 parts of heat stabilizer, 2-10 parts of chemical treatment agent, 0.1-2 parts of processing aid and 0.05-2 parts of metal powder pigment to obtain a mixed material;
(2) feeding the mixed material obtained in the step (1) into a double-screw extruder, fully melting and compounding the material under the conveying and shearing action of a screw, and then extruding, bracing, cooling and granulating the material by a machine head; the screw temperature of a first zone of the double-screw extruder is 200-220 ℃; the temperature of the screw from the second area to the machine head is 220-260 ℃; the rotating speed of the screw is 150 to 500 r/min.
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| CN102532782A (en) * | 2010-12-08 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | High-glossiness spraying-free ABS (acrylonitrile butadiene styrene) resin and preparation method thereof |
| CN103172966A (en) * | 2011-12-20 | 2013-06-26 | 抚顺易桂塑胶科技有限公司 | Preparation method of free-spraying silver flash ABS resin |
| CN105237938A (en) * | 2015-11-11 | 2016-01-13 | 常州绚铭新材料科技有限公司 | Preparation method for resin with free-spraying special texture effect |
| CN106084625A (en) * | 2016-07-29 | 2016-11-09 | 广东壹豪新材料科技股份有限公司 | A kind of weather-proof exempting from sprays high-light ABS |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0711017D0 (en) * | 2007-06-08 | 2007-07-18 | Lucite Int Uk Ltd | Polymer Composition |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532782A (en) * | 2010-12-08 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | High-glossiness spraying-free ABS (acrylonitrile butadiene styrene) resin and preparation method thereof |
| CN103172966A (en) * | 2011-12-20 | 2013-06-26 | 抚顺易桂塑胶科技有限公司 | Preparation method of free-spraying silver flash ABS resin |
| CN105237938A (en) * | 2015-11-11 | 2016-01-13 | 常州绚铭新材料科技有限公司 | Preparation method for resin with free-spraying special texture effect |
| CN106084625A (en) * | 2016-07-29 | 2016-11-09 | 广东壹豪新材料科技股份有限公司 | A kind of weather-proof exempting from sprays high-light ABS |
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