CN111187501A - Spraying-free PC/PBT alloy material and preparation method thereof - Google Patents
Spraying-free PC/PBT alloy material and preparation method thereof Download PDFInfo
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- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/085—Copper
Abstract
The application discloses a spraying-free PC/PBT alloy material and a preparation method thereof, relating to the field of high polymer materials. The application discloses a exempt from to spray PC/PBT alloy material includes: 40-60 parts by weight of PC; 10-50 parts by weight of PBT; 1-20 parts by weight of PC special effect powder master batch; 1-15 parts by weight of a compatibilizer; 0.1-1 parts by weight of an antioxidant; 0.1-1 parts by weight of a processing aid; wherein, PC special effect powder master batch includes: 18-90 parts by weight of PC; 5-80 parts by weight of special effect powder or particles; 0.1-1 weight parts of processing aid. According to the method, the special effect powder or particles are made into master batches by using PC and then dispersed into the PC/PBT alloy material, so that the compatibility of the special effect powder and matrix resin can be obviously improved, and the dispersibility of the special effect powder or particles is improved, so that flow marks and fish eyes on the surface of a product are eliminated, and a weld line is reduced; and moreover, the PC and the PBT are used as alloy materials, so that the thermal deformation temperature of the material is effectively improved, and the market application range of the spraying-free material is greatly widened.
Description
Technical Field
The application relates to the field of high polymer materials, in particular to a spraying-free PC/PBT alloy material and a preparation method thereof.
Background
Along with the attention and concern of people on environmental problems, more and more plastic products adopt a spraying-free material which is more environment-friendly, recyclable and lower in cost compared with the traditional paint spraying material. Meanwhile, the spraying-free material can duplicate the special effects of pearlescence, flash effect, metallic luster, texture and the like produced by spraying paint, thereby meeting diversified and differentiated customer demands and being widely applied to the fields of artware, household appliances, automobiles, electronic and electric appliances, office supplies and the like.
At present, the general preparation method of the spray-free material is to add metal powder, pearl powder and other effect powder with special color and luster into resin. The special effect powder is dispersed into the matrix resin to present special effect texture, although the special effect can be realized by direct addition, the compatibility of the matrix resin and the special effect powder is poor, the special effect powder and the matrix resin material are difficult to reach the consistent fluidity under the conditions of strong shearing and strong pressure of extrusion or injection molding, particularly products with complex structures, the special effect powder oriented along the flowing direction has the phenomena of melt flowing steering, unstable flowing speed, melt converging and the like, the special effect powder is unevenly distributed in the melt, the defects of flow marks, fish eyes, welding lines and the like are easily formed on the surfaces of the products, and the market popularization and the application of the spraying-free material are greatly hindered and limited.
Secondly, the spraying-free materials in the market mainly comprise PP, ABS and PC/ABS, the thermal deformation temperature of the materials is generally below 100 ℃, the high temperature resistance requirements of the automobile industry and other fields are difficult to meet, and the popularization and the application of the spraying-free materials in certain fields with requirements on heat resistance are limited.
In summary, the technical problem to be solved by the skilled person is how to improve the compatibility between the special effect powder and the matrix resin to reduce the defects of flow marks, fish eyes, welding lines and the like of the product and improve the heat-resistant temperature of the material.
Disclosure of Invention
The application aims to provide a spraying-free PC/PBT alloy material and a preparation method thereof, and the spraying-free PC/PBT alloy material which has no flow mark, no fish eye, light welding line, special effect texture and heat distortion temperature higher than 100 ℃ is provided.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: a spray-free PC/PBT alloy material comprises: 40-60 parts by weight of PC; 10-50 parts by weight of PBT; 1-20 parts by weight of PC special effect powder master batch; 1-15 parts by weight of a compatibilizer; 0.1-1 parts by weight of an antioxidant; 0.1-1 parts by weight of a processing aid; wherein, PC special effect powder master batch includes: 18-90 parts by weight of PC; 5-80 parts by weight of special effect powder or particles; 0.1-1 weight parts of processing aid.
In the technical scheme, the special effect powder or particles are made into the master batch by using PC and then dispersed into the PC/PBT alloy material, so that the compatibility of the special effect powder and matrix resin can be obviously improved, the dispersity of the special effect powder or particles is improved, flow marks and fish eyes on the surface of a product are eliminated, a welding line is reduced, and the prepared spraying-free PC/PBT alloy material has obvious metal texture and special aesthetic effect; and moreover, the PC and the PBT are used as alloy materials, so that the thermal deformation temperature of the material is effectively improved, and the market application range of the spraying-free material is greatly widened.
Further, in accordance with an embodiment of the present application, wherein.
Further, according to the embodiment of the application, the PBT has the intrinsic viscosity of 0.8-1.2Dl/g and the melt index of 3-50g/10min at the melting temperature of 220-240 ℃.
Further, according to the embodiment of the present application, wherein the compatilizer is selected from one or more of MBS, SBS grafted maleic anhydride, SEBS grafted maleic anhydride, SMA or acrylate copolymer.
Further, according to the embodiment of the application, wherein the processing aid is one or more of silicone lubricant, amide lubricant, stearic acid lubricant, polyolefin lubricant or ester lubricant.
Further, according to the embodiment of the present application, wherein the antioxidant is one or more of hindered phenol, hindered amine, phosphite, thiodiacrylate or thiol antioxidants.
Further, according to an embodiment of the present application, wherein the special effect powder or particles comprise one or more of metal powder or pearl powder.
Further, according to the embodiment of the application, the content of Al element in the aluminum powder is not less than 60 wt%, and the particle size is 3-200 um.
Further, according to the embodiment of the application, the Cu content in the copper powder is not less than 60 wt%, and the particle size is 3-200 um.
Further, according to the embodiment of the present application, the pearl powder is formed by coating mica with one or more metal oxide thin layers, wherein the metal oxide is one or more of aluminum oxide, tin dioxide, titanium dioxide, iron oxide, antimony oxide or zinc oxide; the particle size of the pearl powder is 5-500 um.
In order to achieve the above purpose, the embodiment of the present application further discloses a preparation method for preparing the above sprayed PC/PBT alloy material, which includes the following steps:
preparing PC special effect powder master batch: taking materials, weighing PC, special effect powder or particles and processing aids in proportion; mixing and granulating, namely uniformly mixing PC, special effect powder (or particles) and processing aids through a mixer, adding the mixture into a double screw for mixing, cooling extruded strips through a water tank, wherein the temperature of cooling water is 15-20 ℃, granulating through a granulator, the rotating speed of the granulator is 200 plus 500rpm, drying through a dryer, and packaging;
preparing a spraying-free PC/PBT alloy material: taking materials, weighing PC, PBT, PC special effect powder master batch, compatilizer, antioxidant and processing aid in proportion; mixing and granulating, namely uniformly mixing the PC, PBT, PC special effect powder master batch, the compatilizer, the antioxidant and the processing aid by a mixer, adding the obtained mixture into a double-screw extruder for mixing, cooling extruded material strips by a water tank, wherein the temperature of cooling water is 15-20 ℃, granulating by a granulator, drying at the rotation speed of 400-900rpm by a dryer, and packaging.
Further, according to the embodiment of the application, in the step of preparing the PC special effect powder master batch, the rotation speed of the extruder is 200-600rpm, and the extrusion temperature is 240-280 ℃.
The spraying-free PC/PBT alloy material can be applied to the fields of household appliances, automobiles, office supplies and electronic appliances.
Compared with the prior art, the method has the following beneficial effects: according to the preparation method, the special effect powder or particles are made into master batches by using PC and then dispersed into the PC/PBT alloy material, so that the compatibility of the special effect powder and matrix resin can be obviously improved, the dispersity of the special effect powder or particles is improved, flow marks and fish eyes on the surface of a product are eliminated, a welding line is reduced, and the prepared spraying-free PC/PBT alloy material has obvious metal texture and special aesthetic effect; and moreover, the PC and the PBT are used as alloy materials, so that the thermal deformation temperature of the material is effectively improved, and the market application range of the spraying-free material is greatly widened.
Drawings
FIG. 1 is a flow chart of a preparation method of a spraying-free PC/PBT alloy material according to an embodiment of the application.
FIG. 2 is a screw assembly diagram of a spraying-free PC/PBT alloy material and a preparation method thereof according to an embodiment of the application.
Detailed Description
In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more apparent, embodiments of the present invention are described in further detail below. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.
The application discloses spraying-free PC/PBT alloy material is formed by mixing and processing PC (polycarbonate), PBT (polybutylene terephthalate), PC special effect powder master batches, compatilizers, antioxidants and processing aids in proportion, and the PC and the PBT are used as the alloy material, so that the heat deformation temperature of the material is effectively improved. The PC special effect powder master batch is prepared by mixing and processing PC, special effect powder or particles and a processing aid in proportion, the special effect powder or particles are made into master batches by the PC and then dispersed into a PC/PBT alloy material, the compatibility of the special effect powder and matrix resin can be obviously improved, the dispersity of the special effect powder or particles is improved, so that flow marks and fish eyes on the surface of a product are eliminated, welding lines are reduced, and the prepared spraying-free PC/PBT alloy material has obvious metal texture and special aesthetic effect.
The individual components are described in detail below.
(A) Matrix resin
In the spraying-free PC/PBT alloy material, the matrix resin consists of PC (A1) and PBT (A2), the content of the PC (A1) is 40-60 parts by weight, and the content of the PBT (A2) is 10-50 parts by weight. Among them, PC (a1) is an engineering plastic with excellent properties, has excellent mechanical properties and good flame retardancy, but has disadvantages of severe thermal deformation at high temperature, poor heat resistance and weather resistance, and the like. PBT (A2) is a thermoplastic polyester which is excellent in flowability, heat resistance and weather resistance, can be easily processed and molded, and has the advantages that its rigidity is not affected by temperature and its deformation is small. The composite material of PC (A1) and PBT (A2) is used as the base resin in the application, so that the chemical resistance and the easy forming of the crystalline material PBT can be kept, the toughness and the dimensional stability of the amorphous material PC can be realized, the heat deformation temperature of the material is effectively improved, and the market application range of the spraying-free material is greatly widened.
In the above technical scheme, the relative density of PC (A1) is 1.2g/cm3The melt index of the alloy at the melting temperature of 220 ℃ and 240 ℃ is 3-50g/10 min. Preferably, PC (A1) having a melt index of 10-20g/min is selected.Next, the PBT (A2) has an intrinsic viscosity of 0.8 to 1.2Dl/g, and preferably a PBT (A2) having an intrinsic viscosity of 1.0Dl/g is selected.
(B) PC special effect powder master batch
In the spraying-free PC/PBT alloy material, the content of the PC special effect powder master batch (B) is 1-20 parts by weight. If the content of the PC special effect powder masterbatch (B) is too low (less than 1 part by weight), the intended metallic texture and aesthetic effect may not be achieved; if the content of the PC special effect powder mother particles (B) is too high (more than 20 parts by weight), it may not be ensured that the PC special effect powder mother particles (B) are uniformly dispersed in the matrix resin, and defects such as flow marks, fish eyes, weld lines, and the like may be easily formed on the surface of the product.
In the technical scheme, the PC special effect powder master batch (B) comprises 18-90 parts by weight of PC, 5-80 parts by weight of special effect powder or particles and 0.1-1 part by weight of processing aid. According to the PC/PBT alloy material, the special effect powder or particles are made into the master batch by using PC and then dispersed into the PC/PBT alloy material, so that the compatibility of the special effect powder and matrix resin can be obviously improved, and the dispersibility of the special effect powder or particles is improved.
In the above technical scheme, the special effect powder or particles may adopt one or more of metal powder or pearl powder.
Wherein, the metal powder can be one or more selected from aluminum powder, copper powder, gold powder and silver powder. Specifically, the Al element content in the aluminum powder is not less than 60 wt%, and the particle size is 3-200um, preferably 4-120 um; in order to overcome the defects that the aluminum powder is easy to explode, oxidize and disperse in the processing process, the aluminum powder is flake aluminum powder which is added with a surface treating agent and subjected to surface treatment. The Cu content in the copper powder is not less than 60 wt%, and the particle size is 3-200 um.
The pearlescent flakes can be made of mica coated with a thin layer of one or more metal oxides. Wherein the metal oxide is one or more of aluminum oxide, tin dioxide, titanium dioxide, iron oxide, antimony oxide or zinc oxide. In particular, the particle size of the pearl powder is 5 to 500um, preferably 4 to 120um
In the above-mentioned technical solutions, the solids content of the special effect particles is 10 to 90 wt.%, preferably 20 to 80 wt.%. The special effect powder or particles account for 5-80 wt%, preferably 5-50 wt% of the master batch.
A small amount of processing aids can be added into the PC special effect powder master batch (B), and the processing aids comprise one or more of silicone lubricants, amide lubricants, stearic acid lubricants, polyolefin lubricants or ester lubricants.
(C) Compatilizer
In the spraying-free PC/PBT alloy material, the content of the compatilizer is 1-15 parts by weight, and the compatilizer can be selected from one or more of MBS, SBS grafted maleic anhydride, SEBS grafted maleic anhydride, SMA or acrylate copolymer.
(D) Antioxidant agent
In the spraying-free PC/PBT alloy material, the content of the antioxidant is 0.1-1 part by weight, and one or more of hindered phenol, hindered amine, phosphite, thiodiacrylate or thiol antioxidant can be adopted. Preferably, the antioxidants are hindered phenols and phosphites.
(E) Processing aid
In the spraying-free PC/PBT alloy material, the content of the processing aid is 0.1-1 part by weight, and the processing aid is one or more of a silicone lubricant, an amide lubricant, a stearic acid lubricant, a polyolefin lubricant or an ester lubricant. Preferably, the processing aid is an ester lubricant.
Based on the same inventive concept, the application also discloses a preparation method of the spraying-free PC/PBT alloy material, the operation flow of which is shown in figure 1 and comprises the following steps:
preparing PC special effect powder master batch: taking materials, weighing PC, special effect powder or particles and processing aids in proportion; mixing and granulating, namely uniformly mixing PC, special effect powder (or particles) and processing aids through a mixer, adding the mixture into a double screw for mixing, cooling extruded strips through a water tank, wherein the temperature of cooling water is 15-20 ℃, granulating through a granulator, the rotating speed of the granulator is 200 plus 500rpm, drying through a dryer, and packaging;
preparing a spraying-free PC/PBT alloy material: taking materials, weighing PC, PBT, PC special effect powder master batch, compatilizer, antioxidant and processing aid in proportion; mixing and granulating, namely uniformly mixing the PC, PBT, PC special effect powder master batch, the compatilizer, the antioxidant and the processing aid by a mixer, adding the obtained mixture into a double-screw extruder for mixing, cooling extruded material strips by a water tank, wherein the temperature of cooling water is 15-20 ℃, granulating by a granulator, drying at the rotation speed of 400-900rpm by a dryer, and packaging.
Wherein the screw combination of the twin screws is shown in FIG. 2, the screw rotation speed is 300rpm, and the extruder temperature is 250 ℃.
The spraying-free PC/PBT alloy material can be applied to the fields of household appliances, automobiles, office supplies and electronic appliances.
The present application is further illustrated by the following examples, but the present application is not limited to these examples.
In the following examples, the raw material sources of the components are shown in table 1.
TABLE 1
| Components | Origin of origin |
| PC | PC-1220 of Letian chemical |
| Aluminum powder | German Merck aluminum silver powder |
| Copper powder | German Merck copper powder |
| Silica-coated pearlescent powder | German merck pearl powder |
| Aluminum silver strip | Aluminum silver strip PE0601 for Shanghai dynasty to take advantage of new material |
| Processing aid | Pets of American Dragon Sand |
| PBT | PBTWX321A of China petrochemical certified chemical fiber Limited responsibility company |
| Compatilizer | Rohm and Hass MBSEXL2620 |
| Antioxidant agent | Antioxidant AT-10 and antioxidant AT-168 of Yabao chemical industry |
Before preparing the spraying-free PC/PBT alloy material, preparing the PC special effect powder master batch (B) firstly, wherein the preparation method of the PC special effect powder master batch (B) comprises the following steps:
taking materials, weighing 18-90 parts by weight of PC, 5-80 parts by weight of special effect powder or particles and 0.1-1 part by weight of processing aid, wherein the special effect powder or particles account for 5-80 wt%, preferably 5-50 wt% of the master batch;
mixing and granulating, namely uniformly mixing PC, special effect powder (or particles) and processing aids through a mixer, adding the mixture into a double screw for mixing, cooling extruded strips through a water tank, wherein the temperature of cooling water is 15-20 ℃, granulating through a granulator, the rotating speed of the granulator is 200 plus materials at 500rpm, drying through a dryer, and packaging.
In a specific embodiment, the contents of the components in the PC special effect powder masterbatch (B) are shown in table 2.
TABLE 2
After preparing the PC special effect powder master batch (B), the spraying-free PC/PBT alloy material can be prepared, and the preparation method comprises the following steps:
weighing 40-60 parts by weight of PC (A1), 10-50 parts by weight of PBT (A2), 1-20 parts by weight of PC special effect powder master batch (B), 1-15 parts by weight of compatilizer (C), 0.1-1 part by weight of antioxidant (D) and 0.1-1 part by weight of processing aid (E);
mixing and granulating, namely uniformly mixing the PC, PBT, PC special effect powder master batch, the compatilizer, the antioxidant and the processing aid by a mixer, adding the obtained mixture into a double-screw extruder for mixing, cooling extruded material strips by a water tank, wherein the temperature of cooling water is 15-20 ℃, granulating by a granulator, drying at the rotation speed of 400-900rpm by a dryer, and packaging.
In a specific embodiment mode, the content of each component in the spray-free PC/PBT alloy material is shown in Table 3.
TABLE 3
In order to embody the technical effects of the technical scheme of the application, the application also lists the traditional spraying-free material as a comparative example to compare with the examples 1 to 12, and the preparation method of the traditional spraying-free material is as follows:
taking materials, and weighing the resin, the special effect powder, the compatilizer, the antioxidant and the processing aid in proportion;
mixing and extruding, namely putting the resin, the special effect powder, the compatilizer, the antioxidant and the processing aid into a high-speed mixer and uniformly mixing; and putting the obtained mixture into a double-screw extruder for mixing, cooling, granulating and packaging.
The composition ratios of the comparative examples are shown in table 4.
TABLE 4
The spray-free materials prepared in examples 1 to 12 and comparative examples 1 to 6 were tested as follows:
fish eye number: observing the sample plate with the thickness of 60mm by 90mm, and recording the number of fish eyes on the surface of the sample plate;
flow mark: observing the surface of the prepared product, wherein the mark of the mark is a minus sign without the flow marks, the mark of the mark is a plus sign with the flow marks, and the more the flow marks are, the more the plus sign is;
welding lines: observing the surface of the prepared product, wherein the mark < - > of the welding line does not exist, the mark 'o' of the welding line exists, and the more the welding line is, the more the mark 'o' is;
heat distortion temperature (. degree. C.): the measurement was carried out under a pressure of 0.45MPa based on ISO 75-2.
The test results are shown in table 5.
TABLE 5
As can be seen from the comparison of the results in the above Table 5, under the condition of ensuring that other components and contents are basically the same, the PC coated special effect powder is adopted for mixing with the matrix resin in the examples 1-12, the special effect powder is directly added into the matrix resin in the comparative examples 1-6, and the products obtained by mixing the PC coated metal powder and the pearl powder or the particles with the matrix resin are found to have basically no flow marks and fish eyes on the surface, lighter welding lines and better aesthetic effect in the comparative examples 1-12 and the comparative examples 1-6. In addition, PP, ABS and PC/ABS are adopted as matrix resin in comparative examples 4-6, and the thermal deformation temperature is higher than 100 ℃ in comparative examples 1-12 and comparative examples 4-6, so that the application field of the spraying-free material is greatly expanded.
Although the illustrative embodiments of the present application have been described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the embodiments, and various modifications within the spirit and scope of the present application defined and determined by the appended claims will be apparent to those skilled in the art from this disclosure.
Claims (13)
1. The spraying-free PC/PBT alloy material is characterized by comprising the following components in parts by weight:
wherein, the PC special effect powder master batch comprises the following components in parts by weight:
18-90 parts of PC;
5-80 parts of special effect powder or particles;
0.1-1 part of processing aid.
2. The spray-free PC/PBT alloy material as claimed in claim 1, wherein the PC has a relative density of 1.2g/cm3 and a melt index of 3-50g/10min at 220-240 ℃.
3. The spray-free PC/PBT alloy material according to claim 1, wherein the PBT has an intrinsic viscosity of 0.8-1.2 Dl/g.
4. The spray-free PC/PBT alloy material according to claim 1, wherein the compatilizer is selected from one or more of MBS, SBS grafted maleic anhydride, SEBS grafted maleic anhydride, SMA or acrylate copolymer.
5. The spray-free PC/PBT alloy material according to claim 1, wherein the processing aid is one or more of a silicone lubricant, an amide lubricant, a stearic acid lubricant, a polyolefin lubricant, or an ester lubricant.
6. The spray-free PC/PBT alloy material according to claim 1, wherein the antioxidant is one or more of hindered phenols, hindered amines, phosphites, thiodiacrylates or thiol antioxidants.
7. The spray-free PC/PBT alloy material according to claim 1, wherein the special effect powder or particles comprise one or more of metal powder or pearl powder.
8. The spraying-free PC/PBT alloy material according to claim 7, wherein the Al element content in the aluminum powder is not less than 60 wt%, and the particle size is 3-200 um.
9. The spray-free PC/PBT alloy material according to claim 7, wherein the Cu content in the copper powder is not less than 60 wt%, and the particle size is 3-200 um.
10. The spray-free PC/PBT alloy material according to claim 7, wherein the pearl powder is formed by coating mica with one or more metal oxide thin layers, and the metal oxide is one or more of aluminum oxide, tin dioxide, titanium dioxide, iron oxide, antimony oxide or zinc oxide; the particle size of the pearl powder is 5-500 um.
11. A method for preparing the spray-free PC/PBT alloy material of claims 1-10, comprising the following steps:
preparing PC special effect powder master batch:
taking materials, weighing PC, special effect powder or particles and processing aids in proportion;
mixing and granulating, namely uniformly mixing PC, special effect powder (or particles) and processing aids through a mixer, adding the mixture into a double screw for mixing, cooling extruded strips through a water tank, wherein the temperature of cooling water is 15-20 ℃, granulating through a granulator, the rotating speed of the granulator is 200 plus 500rpm, drying through a dryer, and packaging;
preparing a spraying-free PC/PBT alloy material:
taking materials, weighing PC, PBT, PC special effect powder master batch, compatilizer, antioxidant and processing aid in proportion;
mixing and granulating, namely uniformly mixing the PC, PBT, PC special effect powder master batch, the compatilizer, the antioxidant and the processing aid by a mixer, adding the obtained mixture into a double-screw extruder for mixing, cooling extruded material strips by a water tank, wherein the temperature of cooling water is 15-20 ℃, granulating by a granulator, drying at the rotation speed of 400-900rpm by a dryer, and packaging.
12. The preparation method of the spraying-free PC/PBT alloy material according to claim 11, wherein in the step of preparing the PC special effect powder master batch, the rotation speed of the extruder is 200-600rpm, and the extrusion temperature is 240-280 ℃.
13. The application of the spraying-free PC/PBT alloy material disclosed by any one of claims 1-13 in the fields of household appliances, automobiles, office supplies and electronic and electric appliances.
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Application publication date: 20200522 |