CN112646348A - High-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material and preparation method thereof - Google Patents
High-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material and preparation method thereof Download PDFInfo
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- 229920006778 PC/PBT Polymers 0.000 title claims abstract description 66
- 239000000956 alloy Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims description 12
- 239000003365 glass fiber Substances 0.000 claims abstract description 45
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 31
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 29
- 239000004417 polycarbonate Substances 0.000 claims abstract description 29
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 17
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 17
- 239000000314 lubricant Substances 0.000 claims abstract description 16
- 230000002745 absorbent Effects 0.000 claims abstract description 14
- 239000002250 absorbent Substances 0.000 claims abstract description 14
- -1 polybutylene terephthalate Polymers 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 4
- 229920000147 Styrene maleic anhydride Polymers 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- OLFNXLXEGXRUOI-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-4,6-bis(2-phenylpropan-2-yl)phenol Chemical group C=1C(N2N=C3C=CC=CC3=N2)=C(O)C(C(C)(C)C=2C=CC=CC=2)=CC=1C(C)(C)C1=CC=CC=C1 OLFNXLXEGXRUOI-UHFFFAOYSA-N 0.000 claims description 2
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 claims description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical group CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 2
- ZTFPVUVWTIJYHK-UHFFFAOYSA-N ethyl prop-2-enoate;methyl 2-methylprop-2-enoate;oxiran-2-ylmethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C=C.COC(=O)C(C)=C.CC(=C)C(=O)OCC1CO1 ZTFPVUVWTIJYHK-UHFFFAOYSA-N 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 229920001897 terpolymer Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 12
- 238000012360 testing method Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 11
- 238000007373 indentation Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 2
- 229920007019 PC/ABS Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- 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
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material which comprises the following components in parts by weight: 60-70 parts of polycarbonate, 27-37 parts of polybutylene terephthalate, 3-5 parts of compatilizer, 0.5-5 parts of fine glass fiber, 0.1-0.5 part of antioxidant, 0.2-1.0 part of ultraviolet absorbent and 0.1-0.5 part of lubricant. The fine glass fiber with the fine monofilament diameter is added into the PC/PBT alloy material to modify the PC/PBT material, so that the modified PC/PBT alloy material has excellent high hardness and high scratch resistance.
Description
Technical Field
The invention belongs to the technical field of polymer modification, and particularly relates to a high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material and a preparation method thereof.
Background
Polycarbonate (PC) is an engineering plastic with outstanding performance, has higher gloss characteristic, higher impact toughness, heat resistance, rigidity and creep resistance, and has excellent dimensional stability; the polybutylene terephthalate (PBT) is a new engineering plastic, has excellent performance and wide application, also has higher glossiness, and the PBT material has the advantages of high crystallization speed, high-speed molding, easy molding and processing, good weather resistance, excellent chemical resistance, excellent wear resistance and scratch resistance, low water absorption, good fatigue resistance and the like. The PC/PBT alloy integrates the respective advantages of PC and PBT, the performances are complementary, main chains in molecular chain structures of PC and PBT materials both contain benzene rings and ester groups, and the chemical structures are similar, so that the obtained PC/PBT alloy material not only keeps higher gloss, but also has good impact resistance, heat resistance and processability, and is widely applied to the mechanical industry, the automobile industry, the electronic and electrical appliance industry, the instrument and meter industry, the household appliance industry and the like.
However, for the high-gloss materials commonly used for automobiles, such as high-gloss PC/ABS, PC/ASA alloy materials and high-gloss pure PC materials, the surface hardness of the materials is low, the scratch-resistant effect of the surfaces of parts is poor, and when the high-gloss materials are touched by hands for a long time, fine scratches are easily left on the surfaces of the parts when the high-gloss materials are used for automotive interiors, such as instrument panels and high-gloss ornaments around a center console. Aiming at the problem of scratch resistance of highlight parts of automotive interiors, the material is innovatively improved, so that the highlight parts have high hardness and high scratch resistance. Meanwhile, the spraying-free highlight PC/PBT alloy is adopted, so that the spraying-free highlight PC/PBT alloy is environment-friendly, saves the spraying cost, is widely applied to parts such as a center console key, a decoration strip, a decoration ring and the like, and has wide application prospect in research, development and production of high-hardness high-scratch-resistance spraying-free highlight PC/PBT alloy materials.
Disclosure of Invention
In order to solve the above problems, a first object of the present invention is to provide a high hardness high scratch resistance spray-free high gloss PC/PBT alloy material, in which fine glass fibers with a relatively small monofilament diameter are added to modify the PC and PBT materials, so that the modified PC/PBT alloy material has excellent high hardness and high scratch resistance.
In order to achieve the purpose, the invention adopts the technical scheme that: a high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material comprises the following components in parts by weight: 60-70 parts of Polycarbonate (PC), 27-37 parts of polybutylene terephthalate (PBT), 3-5 parts of compatilizer, 0.5-5 parts of fine glass fiber, 0.1-0.5 part of antioxidant, 0.2-1.0 part of ultraviolet absorbent and 0.1-0.5 part of lubricant.
In the technical scheme, fine glass fibers are added, and a compatilizer, an antioxidant, an ultraviolet absorber and a lubricant are combined to serve as auxiliary materials to modify PC and PBT, so that the modified PC/PBT alloy material has the characteristics of high hardness and high scratch resistance.
As a preferred scheme, the high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material comprises the following components in parts by weight: 60-70 parts of PC, 27-37 parts of PBT, 3-5 parts of compatilizer, 3-5 parts of fine glass fiber, 0.1-0.5 part of antioxidant, 0.2-1.0 part of ultraviolet absorbent and 0.1-0.5 part of lubricant.
As a preferred scheme, the high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material comprises the following components in parts by weight: comprises the following components in parts by weight: 60-70 parts of PC, 27-37 parts of PBT, 3 parts of compatilizer, 5 parts of fine glass fiber, 0.2 part of antioxidant, 0.4 part of ultraviolet absorbent and 0.2 part of lubricant.
As a preferred scheme, the high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material comprises the following components in parts by weight: comprises the following components in parts by weight: 65 parts of PC, 32 parts of PBT, 3.5 parts of a compatilizer, 5 parts of fine glass fiber, 0.3 part of an antioxidant, 0.5 part of an ultraviolet absorbent and 0.3 part of a lubricant.
Further, the fine glass fiber is chopped fine glass fiber with monofilament diameter of 7-15 μm.
In the technical scheme, the chopped fine glass fiber with the monofilament diameter of 7-15 mu m is selected to have the best modification effect on the PC/PBT alloy material, and the high light performance of the PC/PBT alloy material is not influenced.
Preferably, the fine glass fiber is chopped fine glass fiber with monofilament diameter of 7-10 μm.
Further, the melt index of the PC is 10-20g/min, and the viscosity of the PBT is 0.8-1.5 dl/g.
As a preferred scheme, the melt index of the PC is 10g/min, and the viscosity of the PBT is 1.0 dl/g.
Further, the antioxidant is antioxidant 168; the ultraviolet absorbent is an ultraviolet absorbent UV-234; the compatilizer is one of ethylene-methyl acrylate-glycidyl methacrylate terpolymer (E-MA-GMA), ethylene-ethyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA), methyl methacrylate-glycidyl methacrylate-ethyl acrylate terpolymer (MGE), ethylene-octene copolymer (POE) and styrene-maleic anhydride copolymer (SMA); the lubricant is PETS.
The second objective of the invention is to provide a preparation method of a high-hardness high-scratch-resistance spraying-free highlight PC/PBT alloy material, and the PC/PBT alloy material prepared by the method has excellent hardness and scratch-resistance characteristics, is suitable for manufacturing automobile spraying-free highlight interior trim parts, such as parts like console buttons, decorative rings, decorative strips and the like, and is also suitable for manufacturing electric tool shells such as mower shell bodies, and has wide application, so that the scratch phenomenon caused by contact can be effectively avoided, and the attractiveness of the appearance is ensured.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a preparation method of a high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material comprises the following steps: weighing PC, PBT, a compatilizer, an antioxidant, an ultraviolet absorbent and a lubricant according to the weight part ratio, mixing and stirring. Obtaining a mixture; and putting the mixture into an extrusion device, simultaneously feeding the fine glass fibers from a side feeding port, blending at a high speed, then performing melt extrusion through an extruder, granulating and cooling to obtain the high-strength high-scratch-resistant spraying-free highlight PC/PBT alloy material.
Further, the extruder is a double-screw extruder, and the screw rotating speed of the extruder is 300-600 r/min.
Further, the extruder is divided into 9 sections, and the set temperatures of the 9 sections are respectively 180-.
The invention has the advantages and positive effects that:
1. the spraying-free high-gloss PC/PBT alloy material has the characteristics of high hardness and high scratch resistance by adding the fine glass fibers and modifying PC and PBT by combining a compatilizer, an antioxidant, an ultraviolet absorber and a lubricant as auxiliary materials.
2. The fine glass fiber with the monofilament diameter of 7-15 mu m is selected for use, so that the final PC/PBT alloy material can keep good high light performance and has high hardness and high scratch resistance.
3. The spraying-free highlight PC/PBT alloy material has excellent hardness and scratch resistance, is suitable for manufacturing automobile spraying-free highlight interior trim parts, such as middle control buttons, decorative rings, decorative strips and other parts, and can prevent scratches caused by long-term touch; meanwhile, the method is suitable for manufacturing shells of electric tools such as mower shells and the like, and has wide application prospect.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
Example 1:
weighing 60 parts of PC, 37 parts of PBT, 3 parts of compatilizer, 1680.2 parts of antioxidant, UV-2340.4 parts of ultraviolet absorbent and 0.2 part of PETS according to the weight parts, mixing and stirring to obtain a mixture; wherein the compatilizer is E-MA-GMA, the melt index of PC is 10g/min, the viscosity of PBT is 1.0dl/g, and the monofilament diameter of fine glass fiber is 7 μm.
And putting the mixture into an extrusion device, simultaneously feeding 0.5 part of fine glass fiber from a side feeding port, blending for 10min at a high speed of 250r/min, then performing melt extrusion through an extruder, and performing granulation and cooling to obtain the high-strength high-scratch-resistance spraying-free highlight PC/PBT alloy material.
The PC/PBT alloy material obtained in the embodiment is subjected to experimental detection, and the 20-degree Gloss (GU), the ball indentation hardness (DEG), the PV3987 wear-resistant gloss retention (%), the pencil hardness (grade), the tensile strength (MPa) and the notch punch of a smooth color plate are detectedImpact Strength (KJ/m)3) The test data are shown in Table 2.
The detection method of each performance parameter is as follows:
detection method of 20 ° Gloss (GU) of smooth color plate: the 150 x 100 x 2mm high gloss panels were placed horizontally and the 20 ° gloss values were measured using a gloss meter according to ISO 2813.
The detection method of ball indentation hardness (degree) comprises the following steps: a ball indentation wafer with the diameter of 25mm and the thickness of 4mm is horizontally placed on a ball indentation hardness tester, and a 358N load is used for testing the ball indentation hardness value.
The detection method of the PV3987 abrasion-resistant gloss retention (%) comprises the following steps: the size of the highlight plate is tested to be 150 × 100 × 2mm, the friction resistance experiment is tested according to the popular PV3987 method, the 20-degree angle gloss value of the highlight plate before and after the experiment is recorded, and the retention rate is obtained through calculation.
Detection method of pencil hardness (grade): the pencil hardness was measured on a 150 x 100 x 2mm high gloss plate using mitsubishi pencils of different hardness grades.
Method for measuring tensile strength (MPa): the tensile strength value is tested by using a universal tensile tester according to ISO 527-2 to 1A tensile sample bar, and the test speed is 50 mm/min.
Notched impact Strength (KJ/m)3) The detection method comprises the following steps: the notched impact strength was measured according to ISO 179-1 using a digital display impactor, with a bar size of 80 × 10 × 4mm, notches of V-shaped notch and a notch speed of 2 mm.
Control experimental group 1:
the method is used for comparing the influence of the addition of different fine glass fibers on the performance of the final PC/PBT alloy material;
wherein, the preparation steps and components of the examples 2 to 10 and the comparative examples 1 and 2 are the same as those of the example 1, and the specific contents of the components of the examples and the comparative examples are shown in the table 1; the PC/PBT alloy materials prepared in the examples 2 to 10 and the comparative examples 1 and 2 are subjected to corresponding experimental tests as in the example 1, and the test data are shown in Table 2.
TABLE 1 examples and comparative component contents
Table 2 examples and comparative experimental data
From a comparison of table 1 with table 2, it can be seen that:
1. comparing examples 1 to 4 with example 10 and comparing examples 5 to 8 with example 9, wherein, only the content of the fine glass fiber is changed, and the comparison of the examples shows that the ball indentation hardness, the PV3987 wear-resistant gloss retention rate, the pencil hardness and the tensile strength of the final PC/PBT alloy material are gradually increased along with the increase of the content of the fine glass fiber, the notch impact strength is reduced, therefore, the scratch resistance and hardness of the finally modified PC/PBT alloy material are increased along with the increase of the content of the fine glass fiber within the range of 0.5-5, when the content of the fine glass fiber is 5 parts, the performance is best, when the content of the fine glass fiber is more than 5 parts, the gloss of the glossy color plate at 20 ℃ is reduced too much, and the high gloss performance can no longer be maintained, and therefore, the preferable range of the fine glass fiber is 0.5 to 5.
2. Comparing examples 1-4 with comparative example 1, and comparing examples 5-8 with comparative example 2, and comparing the difference between the PC/PBT alloy material without adding fine glass fiber and the PC/PBT alloy material of the invention, wherein the 20 DEG Gloss (GU) of the smooth color plate of comparative example 1 and comparative example 2 is higher than the 20 DEG Gloss (GU) of the smooth color plate of examples 1-8, so that it can be known that adding fine glass fiber modifies the PC/PBT alloy material, has a slight influence on the gloss, but has a small influence range according to the data of phase difference, and can also keep the high gloss performance; the data of ball indentation hardness, PV3987 abrasion resistant gloss retention, pencil hardness and tensile strength of comparative example 1 and comparative example 2 are significantly lower than those of examples 1 to 8, and thus it is known that the addition of the fine glass fiber can effectively improve the hardness and scratch resistance of the PC/PBT alloy material, so that the PC/PBT alloy material has high hardness and high scratch resistance.
Control experimental group 2:
the method is used for comparing the influence of fine glass fibers with different diameters on the performance of the final PC/PBT alloy material;
the preparation steps and the component contents of the examples 11 to 14 are the same as those of the example 4, except that the diameters of the filaments of the fine glass fibers are shown in table 3; the PC/PBT alloy materials prepared in the examples 11 to 14 are tested in an experiment, and the test data are compared with the data of the example 4, so that the test results shown in the following Table 3 can be obtained:
table 3 component contents and test data of examples 11 to 14
Comparing example 4 with examples 11 to 14, the data of ball indentation hardness, PV3987 abrasion resistant gloss retention and tensile strength of examples 11 to 14 are all smaller than those of example 4, so that the modification effect on the PC/PBT alloy material is poorer as the diameter of the fine glass fiber monofilament is increased, and especially when the diameter of the fine glass fiber monofilament is more than 15 μm, the 20 DEG gloss effect of the PC/PBT smooth panel is influenced, and the highlight effect is influenced; it can be seen that the smaller the monofilament diameter of the fine glass fiber added, the better the modification effect on the PC/PBT alloy material, and when the monofilament diameter is 7 μm, the hardness and scratch resistance of the PC/PBT alloy material are the best. At present, fine glass fibers with the monofilament diameter of less than 7 mu m do not appear on the market, so the fine glass fibers have the best effect when the monofilament diameter is 7 mu m.
Control experimental group 3:
under the condition that the content of the fine glass fibers is consistent with the diameter, the influence of the content of other components on the performance of the final PC/PBT alloy material is compared;
wherein, the preparation steps of the examples 15 to 19 are consistent with those of the example 4, and the specific contents are shown in the table 4; the PC/PBT alloy materials prepared in the examples 15 to 19 are tested in an experiment, and the test data are compared with the data of the example 4, so that the test results shown in the table 5 can be obtained:
table 4 component contents of examples 15 to 19 and example 4
Table 5 experimental data for examples 15 to 19 and example 4
As can be seen from the data in tables 4 and 5, the performance of the final PC/PBT alloy material is not greatly affected by changing the compatibilizer, antioxidant, UV absorber, and lubricant.
Control experimental group 4:
the method is used for comparing the influence of PC with different melting fingers on the performance of the final PC/PBT alloy material;
the preparation steps and the component contents of examples 20 to 23 are the same as those of example 4, except that the melt index of PC is different, and the specific melt index values are shown in Table 6; the PC/PBT alloy materials prepared in the examples 20 to 23 are tested in an experiment, and the test data are compared with the data of the example 4, so that the test results shown in the table 6 can be obtained:
TABLE 6 PC melt index values and test results for examples 20 to 23
As can be seen from the data in Table 6, the different melt index ranges of PC have no great influence on the performance of the final PC/PBT alloy material, and the conventional melt index range of 10-20g/min is selected.
Control experimental group 5:
the impact of PBT with different viscosities on the performance of the final PC/PBT alloy material is compared;
the preparation steps and the component contents of the examples 24 to 27 are the same as those of the example 4, except that the viscosity of the PBT is different, and the specific contents are shown in Table 7; the PC/PBT alloy materials prepared in the examples 24 to 27 are tested in an experiment, and the test data are compared with the data of the example 4, so that the test results shown in the table 7 can be obtained:
TABLE 7 viscosity and test results for PBT of examples 24 to 27 and example 4
| Components | Example 4 | Example 24 | Example 25 | Example 26 | Example 27 |
| Viscosity of PBT (dl/g) | 1.0 | 0.8 | 1.2 | 1.4 | 1.5 |
| Bright color plate 20 degree Gloss (GU) | 97 | 96 | 97 | 96 | 96 |
| Ball indentation hardness (degree) | 132 | 130 | 130 | 133 | 132 |
| PV3987 abrasion resistant gloss retention (%) | 86 | 85 | 85 | 87 | 87 |
| Pencil hardness (grade) | 2H | 2H | 2H | 2H | 2H |
| Tensile Strength (MPa) | 66 | 66 | 63 | 65 | 65 |
| Notched impact Strength (KJ/m)3) | 7.9 | 7.8 | 7.2 | 7.8 | 7.9 |
As can be seen from the data in Table 7, the different melt index viscosity ranges of PBT do not greatly affect the properties of the final PC/PBT alloy material, and the conventional viscosity range of 0.8-1.5dl/g is selected.
The experimental comparison shows that the PC/PBT alloy material prepared by the invention has high hardness, high scratch resistance and good gloss, is suitable for manufacturing automotive spraying-free high-gloss interior trim parts, such as middle control buttons, decorative rings, decorative strips and other parts, and can prevent scratches caused by long-term touch; meanwhile, the method is suitable for manufacturing shells of electric tools such as mower shells and the like, and has wide application prospect.
Although the embodiments of the present invention have been described in detail, the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. A high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material is characterized in that: comprises the following components in parts by weight: 60-70 parts of polycarbonate, 27-37 parts of polybutylene terephthalate, 3-5 parts of compatilizer, 0.5-5 parts of fine glass fiber, 0.1-0.5 part of antioxidant, 0.2-1.0 part of ultraviolet absorbent and 0.1-0.5 part of lubricant.
2. The high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material according to claim 1, characterized in that: comprises the following components in parts by weight: 60-70 parts of polycarbonate, 27-37 parts of polybutylene terephthalate, 3-5 parts of compatilizer, 3-5 parts of fine glass fiber, 0.1-0.5 part of antioxidant, 0.2-1.0 part of ultraviolet absorbent and 0.1-0.5 part of lubricant.
3. The high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material according to claim 1, characterized in that: comprises the following components in parts by weight: 60-70 parts of polycarbonate, 27-37 parts of polybutylene terephthalate, 3 parts of compatilizer, 5 parts of fine glass fiber, 0.2 part of antioxidant, 0.4 part of ultraviolet absorbent and 0.2 part of lubricant.
4. The high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material according to claim 1, characterized in that: comprises the following components in parts by weight: 65 parts of polycarbonate, 32 parts of polybutylene terephthalate, 3.5 parts of compatilizer, 5 parts of fine glass fiber, 0.3 part of antioxidant, 0.5 part of ultraviolet absorbent and 0.3 part of lubricant.
5. The high-hardness high-scratch-resistant spray-free high-gloss PC/PBT alloy material according to any one of claims 1, 2, 3 or 4, wherein: the fine glass fiber is chopped fine glass fiber with monofilament diameter of 7-15 μm, and preferably, the fine glass fiber is chopped fine glass fiber with monofilament diameter of 7-10 μm.
6. The high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material according to claim 5, characterized in that: the melt index of the polycarbonate is 10-20g/min, the viscosity of the polybutylene terephthalate is 0.8-1.5dl/g, and preferably, the melt index of the polycarbonate is 10g/min, and the viscosity of the polybutylene terephthalate is 1.0 dl/g.
7. The high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material according to claim 6, characterized in that: the antioxidant is antioxidant 168; the ultraviolet absorbent is an ultraviolet absorbent UV-234; the compatilizer is one of ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene-ethyl acrylate-glycidyl methacrylate copolymer, methyl methacrylate-glycidyl methacrylate-ethyl acrylate terpolymer, ethylene-octene copolymer and styrene-maleic anhydride copolymer; the lubricant is PETS.
8. A method for preparing the high-hardness high-scratch-resistant spraying-free high-gloss PC/PBT alloy material according to any one of claims 1 to 7, which is characterized in that: the method comprises the following steps: weighing polycarbonate, polybutylene terephthalate, a compatilizer, an antioxidant, an ultraviolet absorbent and a lubricant according to the weight part ratio, and mixing and stirring to obtain a mixture; and putting the mixture into an extrusion device, simultaneously feeding the fine glass fibers from a side feeding port, blending, then carrying out melt extrusion through an extruder, granulating and cooling to obtain the high-strength high-scratch-resistance spraying-free highlight PC/PBT alloy material.
9. The preparation method of the high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material according to claim 8, characterized in that: the extruder is a double-screw extruder, and the screw rotating speed of the extruder is 300-600 r/min.
10. The preparation method of the high-hardness high-scratch-resistance spraying-free high-gloss PC/PBT alloy material according to claim 9, characterized by comprising the following steps: the extruder is divided into 9 sections, and the set temperatures of the 9 sections are respectively 180 DEG, 210 DEG, 230 DEG, 240 DEG, 260 DEG, and 240 DEG, 260 deg.
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Application publication date: 20210413 |