WO2018036374A1 - Pc alloy material, and preparation method therefor and applications thereof - Google Patents

Abstract

A PC alloy material. The PC alloy material comprises the components calculated in parts by weight: 54 to 91 parts of polycarbonate, 4 to 61 parts of polyethylene terephthalate-1,4-cyclohexanedimethanol terephthalate, 0 to 32 parts of fibrous filler and 0 to 6 parts of other assistants. The PC alloy is modified by using polyester, so that the obtained PC alloy material overcomes the defects of the existing PC alloy material, has good flowability, good warping property, good internal stress property, good demolding property and good color and luster, and is especially suitable for being prepared into thin-walled products.

Description

PC alloy material and preparation method and application thereof Technical field

The invention relates to the technical field of polymer materials, in particular to a PC alloy material and a preparation method and application thereof.

Background technique

Polycarbonate (PC) is an engineering plastic with excellent performance. It has good comprehensive properties, high mechanical strength, good impact toughness, dimensional stability and good electrical insulation. However, PC also has high melt viscosity, poor fluidity and solvent resistance. Poor property, stress cracking and swelling in solvent and alkaline environment, sensitivity to notch, stress cracking during processing, and high processing temperature. It is a more effective and simple modification method to select special polyester to improve PC performance and obtain composite materials with excellent comprehensive performance.

Polyethylene terephthalate-1,4-cyclohexanedimethanol ester has high impact strength, outstanding transparency, high gloss, good heat resistance, no bending, scratch resistance, aging resistance, and anti-aging Excellent in static electricity, chemical resistance, hydrolysis resistance, good fluidity, strong tinting strength, easy molding, and good hygiene (according to FDA).

Although the prior art uses polyethylene terephthalate-1,4-cyclohexane dimethanol ester to modify PC, its products have fluidity, warpage properties, internal stress properties, and release properties. The color and other aspects have not achieved good results, especially in the case of thin-walled products, the above-mentioned performance is particularly insufficient.

Summary of the invention

The object of the present invention is to solve the deficiencies of the prior art and provide a PC alloy material which has good fluidity, warpage property, internal stress property, mold release property and color, and is particularly suitable for forming thin walls. product.

Another object of the present invention is to provide a method of preparing the PC alloy material.

Another object of the invention is to provide an application of the PC alloy material.

The above object of the present invention is achieved by the following technical solutions.

A PC alloy material comprising the following components by weight:

54 to 91 parts of polycarbonate;

Polyethylene terephthalate-1,4-cyclohexanedimethanol ester 4 to 61 parts;

Fibrous filler 0～32 parts;

Other additives 0 to 6 parts.

Preferably, the PC alloy material comprises the following components by weight:

54 to 91 parts of polycarbonate;

Polyethylene terephthalate-1,4-cyclohexanedimethanol ester 4 to 61 parts;

Fibrous filler 0～32 parts;

Other additives 0 to 6 parts;

The PC alloy material contains aluminum element, copper element and zirconium element, the content of the aluminum element is 0.1 to 500 ppm, the content of the copper element is 0.1 to 500 ppm, and the content of the zirconium element is 0.1 to 500 ppm.

The inventors have unexpectedly discovered that in the above formulation, the addition of aluminum, copper and zirconium elements and controlling the content thereof within a certain range can further enhance polyethylene terephthalate-1,4-cyclohexane. Warpage properties, internal stress properties, release properties, and color of PC modified by dimethanol ester.

When the content of any of the added aluminum element, copper element or zirconium element is too high, the above effect cannot be obtained.

Preferably, the content of the aluminum element in the PC alloy material is preferably from 1 to 300 ppm, more preferably from 1 to 100 ppm. Further, the aluminum element is preferably contained in an amount of 10 to 90 ppm, more preferably 20 to 70 ppm.

Preferably, the content of the copper element in the PC alloy material is preferably from 1 to 300 ppm, more preferably from 1 to 100 ppm. Further, the copper element is preferably contained in an amount of 10 to 90 ppm, more preferably 20 to 70 ppm.

Preferably, the content of the zirconium element in the PC alloy material is preferably from 1 to 300 ppm, more preferably from 1 to 100 ppm. Further, the zirconium element is preferably contained in an amount of 6 to 80 ppm, more preferably 12 to 60 ppm.

Preferably, the aluminum element is present in the PC alloy material in the form of an aluminum salt or an oxide of aluminum. The aluminum salt includes, but is not limited to, aluminum chloride, aluminum sulfate, aluminum nitrate or aluminum phosphate, and the like. The oxide of aluminum includes, but is not limited to, aluminum oxide.

Preferably, the copper element is present in the PC alloy material in the form of a copper salt or an oxide of copper. The copper salts include, but are not limited to, copper chloride, copper nitrate, copper sulfate, copper phosphate. The oxide of copper includes, but is not limited to, copper oxide or cuprous oxide.

Preferably, the zirconium element is present in the PC alloy material in the form of an oxide of zirconium or zirconium. The zirconium salts include, but are not limited to, zirconium chloride, zirconium nitrate, zirconium sulfate, zirconium phosphate. The zirconium oxides include, but are not limited to, zirconia.

Preferably, the polyethylene terephthalate-1,4-cyclohexanedimethanol ester has a melting point of 290 to 310 °C.

More preferably, the 1,4-cyclohexanedimethylene in the polyethylene terephthalate-1,4-cyclohexanedimethanol ester The molar ratio of the alcohol structural unit (CHDM) to the ethylene glycol structural unit (EG) is from 80:20 to 20:80.

More preferably, the 1,4-cyclohexanedimethanol structural unit (CHDM) and the ethylene glycol structural unit (EG) in the polyethylene terephthalate-1,4-cyclohexane dimethanol ester The molar ratio is 60:40 to 70:30 or 30:70 to 40:60.

In the alloy composition, the addition of a fibrous filler can further enhance its mechanical properties. Therefore, it is preferred that the content of the fibrous filler in the PC alloy material is more than 0 parts.

The fibrous filler may be one or more of metal fiber, carbon fiber, plastic fiber, glass fiber; preferably glass fiber; wherein the glass fiber is selected from one of a roving fiber, a long glass fiber, and a short glass fiber. Or a few, preferably one or more of M-glass, E-glass, A-glass, S-glass, R-glass, C-glass, more preferably E-glass, A-glass, C -glass. The above glass fiber may be surface-treated by a slurry and an adhesion promoter, or may be partially covered with a surface treatment, or may be subjected to no treatment on the surface; the diameter of the glass fiber is 1 um to 25 um, preferably 3 um. ～20 um, most preferably 4 um to 15 um.

Preferably, when the PC alloy material contains aluminum element, copper element and zirconium element, the content of aluminum element, copper element and zirconium element contained therein is tested as follows:

Accurately weigh 2g of PC alloy material in the analytical balance, pour into 100ml digestion bottle, then add 9ml of 97% concentrated sulfuric acid, heat in the iron plate heating instrument at preset temperature of 300 °C for 10 minutes, then add 68% 5 ml of nitric acid, and then kept heating for 20 minutes, the particles are completely decomposed and then cooled to room temperature. After adding 20 ml of hydrogen peroxide and acid to pH 7, the liquid is diluted with deionized water, and the liquid is introduced into the ICP through a sample tube. The contents of aluminum, copper and zirconium are measured in the instrument.

The PC alloy material of the present invention may further include other auxiliaries such as antioxidants, light stabilizers, impact modifiers, flame retardants, fluorescent whitening agents, lubricants, plasticizers, etc., depending on the needs of different uses. Toughener, thickener, antistatic agent, mold release agent, pigment, etc.

The antioxidant may be an antioxidant commonly used in the art, and may be selected from one or more of a hindered amine antioxidant, a hindered phenol antioxidant, or a phosphite antioxidant, such as 1010, 168. One of, 1076, 445, 1098 or a mixture of two or more.

The toughening agent may be a toughening agent commonly used in the art, such as an EVA type toughening agent, an EMA type toughening agent, an ASA type toughening agent, an AES type toughening agent, a SAS type toughening agent, and an acrylate type. One or more mixtures of tougheners, silicone toughening agents.

The light stabilizer may be a light stabilizer commonly used in the art, such as a mixture of one or more of a hindered amine or an ultraviolet absorber, and specifically, UV-944, UV-234, 770DF, 328, 531 , one of the 5411 or a mixture of two or more.

The impact modifier may be an impact modifier commonly used in the art, such as one or a mixture of two of PTW, styrene-ethylene/butylene-styrene block copolymer SEBS.

The flame retardant may be a flame retardant commonly used in the art, such as a phosphorus flame retardant, and specifically may be bisphenol A bis(diphenyl phosphate) BDP, RDP, dimethyl methylphosphonate (DMMP). And one or a mixture of two or more of diethyl diethylphosphonate (DEEP).

The fluorescent whitening agent can be a fluorescent whitening agent commonly used in the art, such as bistriazinylaminostilbene.

The lubricant may be a lubricant commonly used in the art, such as one or a mixture of two or more of pentaerythritol ester, montan wax, silicone oil.

The plasticizer may be a plasticizer commonly used in the art, such as one or a mixture of two or more of glycerin, citric acid, butyl citrate, epoxidized soybean oil and the like.

The thickener may be a thickener commonly used in the art, such as an inorganic thickener, a polyacrylate thickener.

The antistatic agent is a permanent antistatic agent and may be a permanent antistatic agent commonly used in the art, such as one of PELESTAT-230, PELESTAT-6500, SUNNICO ASA-2500, or a mixture of two or more thereof.

The release agent may be a release agent commonly used in the art, such as one of silicone oil, paraffin wax, white mineral oil, petrolatum or a mixture of two or more.

The pigment may be a pigment commonly used in the art, such as one or a mixture of two or more of carbon black, titanium white powder, black species, phthalocyanine blue, fluorescent orange, and the like.

The warpage of the PC alloy material is measured by a secondary element, and the maximum warpage γ is less than 100, the surface tension is greater than 44 dynes, and the color deviation is less than 1.5%.

The surface tension test can be carried out by referring to the following methods: different dyne solution prepared by using ethanol and water, and applying a dash solution to a flat plate surface (coating area>3 cm ² ), as in 2 If it does not shrink in seconds, it can be re-tested with a higher value of the solvent; if it shrinks within 2 seconds, it breaks into many small droplets, indicating that the number of the last used Dyne solvent is the surface of the plate. tension.

The color test can be carried out by referring to the following method: using a color difference meter, measuring three sets of data of color L, a, b and Four sets of color difference data of ΔE, ΔL, Δa, and Δb after colorimetry are calculated.

The color difference ΔE = (ΔL ² + Δa ² + Δb ² ) ^{1/2 is} calculated.

The preparation method of the PC alloy material of the present invention comprises the following steps:

1) Weigh each component according to the formula content, and pre-baking polycarbonate, polyethylene terephthalate-1,4-cyclohexane dimethanol ester, fibrous filler, other additives Pre-drying treatment at 120 ° C ~ 130 ° C;

2) pre-baking the polycarbonate, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, fibrous filler, and other auxiliary agents, respectively, and uniformly mixing through a high-mixer;

3) a homogeneously mixed polycarbonate, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, other auxiliaries, aluminum or aluminum oxides, copper salts or copper oxides and The zirconium or zirconium oxide is passed through the main feed port, and the fibrous filler is fed into the twin-screw extruder through the main feed port or the side feed port. The temperature setting temperature of the twin-screw extruder is 200 ° C. ~280 ° C;

4) Cooling and pelletizing.

Preferably, the method for preparing the PC alloy material comprises the following steps:

1) Weigh each component according to the formula content, and pre-baking polycarbonate, polyethylene terephthalate-1,4-cyclohexane dimethanol ester, fibrous filler, other additives Pre-drying treatment at 120 ° C ~ 130 ° C, pre-baking time set to 4h ~ 6h, to obtain pre-baked polycarbonate, polyethylene terephthalate - 1,4-cyclohexane dimethanol Ester, fibrous filler, other additives;

2) pre-baked polycarbonate, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, fibrous filler, other additives, respectively, mixed by high-mixer, mixing temperature The temperature is 30 ° C ~ 50 ° C, the mixing time is set at 5 min ~ 15 min;

3) a homogeneously mixed polycarbonate, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, other auxiliaries, aluminum or aluminum oxides, copper salts or copper oxides and The zirconium or zirconium oxide is passed through the main feed port, and the fibrous filler is fed into the twin-screw extruder through the main feed port or the side feed port. The temperature setting temperature of the twin-screw extruder is 200 ° C. ～280°C, wherein at least one vacuum is set, and the vacuum may be located at the end of the conveying section, the front end of the melting section and the metering section;

4) The melt is passed through the die, and the number of die holes is in the range of 4 to 30, so that the molten strip of the strip composition having a diameter of 0.5 mm to 10 mm can be obtained; the molten strip passes through the temperature of 20 ° C to 25 ° C The water tank cooling port is introduced into the pelletizer for homogenization pelletization, and the obtained particles are dehumidified by sieve empty to obtain the final PC. alloy.

Compared with the prior art, the present invention has the following beneficial effects:

The invention adopts polyester to modify the PC alloy, so that the obtained PC alloy material overcomes the shortage of the existing PC alloy material, and at the same time has good fluidity, warpage property, internal stress property, demolding performance and color. Particularly suitable for making thin-walled products. In particular, after adding a specific content of aluminum element, copper element and zirconium element to the PC alloy material, the warpage property, internal stress property, mold release property and color of the obtained PC alloy material are further improved.

detailed description

The present invention is described below in conjunction with the specific embodiments. However, the scope of the present invention is not limited to the following embodiments, and the description of the embodiments is only for facilitating understanding of the method of the present invention and its core idea. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention are intended to be included within the scope of the invention.

In the embodiment, each performance is tested according to the following scheme:

(1) Fluidity test MFR: According to the measurement ASTM D1238, the test conditions were 260 ° C, 5 kg.

(2) Warpage performance

Observing the deviation distance by using the second element and characterizing the maximum warpage

γ=h/l*a.

h is the maximum distance between the workpiece and the reference object, l is the projection length of the workpiece at the reference object, and a is the length of the workpiece perpendicular to the direction of the reference object.

(3) Internal stress test

Acetone soak test: PC alloy material was immersed in acetone solvent at room temperature for 1 hour, and air cracking was taken out to observe cracking.

No visible crack evaluation is good, and cracks are judged to be poor.

(4) Adhesion, surface tension test

The evaluation method is that when the surface tension ≤ 44 dynes is judged to be poor, when the surface tension is > 44 dynes, it is judged as good.

The test method is as follows:

Different dyne solution prepared by using ethanol and water, coated with a cotton swab and a dyne solution on the surface of the flat alloy plate (coating area>3cm ² ), if not shrinking within 2 seconds, Use the higher value dyne solvent retry; if shrinkage occurs within 2 seconds, breaking into many small droplets, it indicates that the number of the last used Dyne solvent is the surface tension of the plate.

Is it easy to remove paint:

The change in surface tension is reflected in whether it is easy to cause paint stripping when painting PC alloy material products. The greater the surface tension, the stronger the bond between the paint and the PC alloy material, and it is not easy to fall off the paint.

The cross-lattice method is used to test the paint film. GB/T 9286, the width of the knife edge is about 10mm~12mm, and the interval is from 1mm to 1.2mm. There are 10 grids. When the line is drawn down, there will be 10 straight line marks with the same interval. When the vertical position of the straight knife mark is drawn down, it becomes a square of 100 squares of 10*10. When the 100-grain knife is drawn down, it should be cut to the bottom of the material. It should not be cut only on the paint, otherwise the test will not be established. When the Baige knife is finished, it will not fall off with the tape test. First, the tape is attached to the position of the hundred grid, the tape is pressed tightly with the finger pressed, and the tape is torn up with an instant force, visually on the material. Whether the paint is detached or not, in addition to the JIS standard, the 3D Transparent Tape 600 is specified.

(5) Mold release property, the injection temperature is 280 ° C, and when the injection speed is 50%, the cooling time is 10 s, and whether the material and the mold can be directly separated. Easy to remove is judged to be good, and manual picking is required to be judged as poor.

(6) The color method adopts the following method: under the standard C light source, the magnesium oxide standard whiteboard is used as a reference, and the value calculated from the reflectance of the red, green and blue light of the sample is evaluated, and the degree of yellowing is evaluated. The smaller the value, the better. .

Polycarbonate is an aromatic polycarbonate (brand: PC L-1250Y).

Polyethylene terephthalate-1,4-cyclohexanedimethanol ester is Eastman product:

Polyester A is polyethylene terephthalate-1,4-cyclohexanedimethanol ester having a melting point of 290 ° C and n (CHDM): n (EG) = 80:20.

Polyester B is polyethylene terephthalate-1,4-cyclohexanedimethanol ester having a melting point of 295 ° C and n (CHDM): n (EG) = 65:35.

Polyester C is polyethylene terephthalate-1,4-cyclohexanedimethanol ester having a melting point of 300 ° C and n (CHDM): n (EG) = 50:50.

Polyester D is polyethylene terephthalate-1,4-cyclohexanedimethanol ester having a melting point of 305 ° C and n (CHDM): n (EG) = 35:65.

Polyester E is polyethylene terephthalate-1,4-cyclohexanedimethanol ester having a melting point of 310 ° C and n (CHDM): n (EG) = 20:80.

In the examples and comparative examples, the sources of the aluminum elements used were all commercially available aluminum salts or aluminum oxides. Place The source of the copper element used is a commercially available copper salt or copper oxide. The source of the zirconium element used is a commercially available zirconium salt or zirconium oxide, and other unspecified raw materials are generally commercially available products.

In the embodiment and the comparative example, the preparation method of the PC alloy material comprises the following steps:

1) Weigh each component according to the formula content, and pre-baking polycarbonate, polyethylene terephthalate-1,4-cyclohexane dimethanol ester, fibrous filler, other additives Pre-drying treatment at 120 ° C ~ 130 ° C;

2) pre-baking polycarbonate, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, fibrous filler, and other auxiliary agents are uniformly mixed by a high-mixer;

3) a homogeneously mixed polycarbonate, polyethylene terephthalate-1,4-cyclohexane dimethanol ester, other auxiliaries, aluminum or aluminum oxides, copper salts or copper oxides, The zirconium or zirconium oxide is passed through the main feed port, and the fibrous filler is fed into the twin-screw extruder through the main feed port or the side feed port. The temperature setting temperature of the twin-screw extruder is 200 ° C. ~280 ° C;

4) Cooling and pelletizing. The amount of the aluminum oxide or aluminum oxide, the copper salt or the copper oxide, the zirconium salt or the zirconium oxide is adjusted by detecting the content of the aluminum element and the copper element in the pellet.

E.g:

1) taking 70Kg of polycarbonate resin, 30Kg of polyethylene terephthalate-1,4-cyclohexanedimethanol ester, pre-drying treatment at 120 ° C ~ 130 ° C;

2) The polycarbonate and polyethylene terephthalate-1,4-cyclohexanedimethanol ester after pre-baking treatment are uniformly mixed by a high-mixing machine;

3) Mixing uniformly polycarbonate, polyethylene terephthalate-1,4-cyclohexane dimethanol ester, respectively, through a main feed port, into a twin-screw extruder, twin-screw extrusion The temperature control setting temperature of the machine is 200 ° C ~ 280 ° C; taking aluminum oxide, 0.06% relative to the total weight of the polycarbonate resin and polyethylene terephthalate - 1,4-cyclohexane dimethanol ester, 0.04% copper oxide, 0.05% zirconia is added at the main feed port;

4) Cooling and pelletizing. The content of aluminum in the pellets was measured, and the aluminum content was 310 ppm, the copper content was 305 ppm, and the zirconium content was 312 ppm.

Examples 0 to 32 and Comparative Examples 1 to 3

The PC alloy materials of Examples 0 to 32 and Comparative Examples 1 to 3 were prepared according to the formulations of Tables 1 to 6, and their performance tests are shown in Table 7. It can be seen from Examples 1 to 32 that the warpage, internal stress, mold release property and color performance of the PC alloy material are significantly improved when the aluminum alloy, the zirconium element and the copper element are added to the PC alloy material. From In Comparative Examples 1 to 3, it can be seen that when the content of any of the added aluminum element, copper element, and zirconium element is too high, the warpage, internal stress, and color properties of the PC alloy material are significantly affected.

Table 1

Table 2

table 3

	Example 18	Example 19	Example 20	Example 21	Example 22
Polycarbonate resin / kg	70	70	70	70	70
Polyester A/kg	30
Polyester B/kg		30
Polyester C/kg			30
Polyester D/kg				30
Polyester E/kg					30
Source of zirconium	Zirconia	Zirconia	Zirconia	Zirconia	Zirconia
Source of copper	Copper oxide	Copper oxide	Copper oxide	Copper oxide	Copper oxide
Source of aluminum	Aluminum oxide	Aluminum oxide	Aluminum oxide	Aluminum oxide	Aluminum oxide
Zirconium content / ppm	25	25	25	25	25
Copper content / ppm	33	33	33	33	33
Aluminum content / ppm	33	33	33	33	33

Table 4

	Example 23	Example 24	Example 25	Example 26
Polycarbonate resin / kg	54	91	70	70
Polyester A/kg	30	30	4	61
Source of zirconium	Zirconia	Zirconia	Zirconia	Zirconia
Source of copper	Copper oxide	Copper oxide	Copper oxide	Copper oxide
Source of aluminum	Aluminum oxide	Aluminum oxide	Aluminum oxide	Aluminum oxide
Zirconium content / ppm	25	25	25	25

Copper content / ppm	33	33	33	33
Aluminum content / ppm	33	33	33	33

table 5

Table 6

	Comparative example 1	Comparative example 2	Comparative example 3
Polycarbonate resin / serving	70	70	70
Polyester A / serving	30	30	30
Source of zirconium	Zirconia	Zirconia	Zirconia
Source of copper	Copper oxide	Copper oxide	Copper oxide
Source of aluminum	Aluminum oxide	Aluminum oxide	Aluminum oxide

Zirconium content / ppm	88	532	117
Copper content / ppm	92	99	125
Aluminum content / ppm	549	107	543

Table 7

Claims (10)

1. A PC alloy material comprising the following components by weight:

   Polycarbonate 54-91 parts;

   Polyethylene terephthalate-1,4-cyclohexanedimethanol ester 4 to 61 parts;

   Fibrous filler 0～32 parts;

   Other additives 0 to 6 parts.
2. The PC alloy material according to claim 1, comprising the following components by weight:

   Polycarbonate 54-91 parts;

   Polyethylene terephthalate-1,4-cyclohexanedimethanol ester 4 to 61 parts;

   Fibrous filler 0～32 parts;

   Other additives 0 to 6 parts;

   The PC alloy material contains aluminum element, zirconium element and copper element, and the content of the aluminum element is 0.1 to 500 ppm, preferably 1 to 300 ppm, more preferably 1 to 100 ppm; and the content of the copper element is 0.1 to 500 ppm, preferably 1 to 300 ppm, more preferably 1 to 100 ppm; and the zirconium element content is 0.1 to 500 ppm, preferably 1 to 300 ppm, and more preferably 1 to 100 ppm.
3. The PC alloy material according to claim 2, wherein the aluminum element is present in the PC alloy material in the form of an aluminum salt or an aluminum oxide; the copper element is present in the PC alloy material in the form of a copper salt or an oxide of copper. The zirconium element is present in the PC alloy material in the form of an zirconium or zirconium oxide.
4. The PC alloy material according to claim 2 or 3, wherein the aluminum element is present in the PC alloy material in the form of aluminum chloride, aluminum nitrate, aluminum sulfate, aluminum phosphate or aluminum oxide; the copper element is chlorinated. Copper, copper nitrate, copper sulfate, copper phosphate, copper oxide or cuprous oxide are present in the PC alloy material; zirconium is present in the PC alloy in the form of zirconium chloride, zirconium nitrate, zirconium sulfate, zirconium phosphate, zirconium oxide. In the material.
5. The PC alloy material according to claim 1 or 2, wherein the polyethylene terephthalate-1,4-cyclohexanedimethanol ester has a melting point of 290 to 310 °C.
6. The PC alloy material according to claim 5, wherein the structural unit and the 1,4-cyclohexanedimethanol ester of the polyethylene terephthalate-1,4-cyclohexanedimethanol ester The molar ratio of the ethylene terephthalate structural unit is from 80:20 to 20:80, preferably from 60:40 to 70:30 or from 30:70 to 40:60.
7. The PC alloy material according to claim 2, wherein the content of the aluminum element, the copper element and the zirconium element in the PC alloy material is tested as follows: 2 g of the PC alloy material is accurately weighed in an analytical balance. Pour into a 100ml digestion bottle, then add 9ml of 97% concentrated sulfuric acid, heat in a 300 °C iron plate heating instrument for 10 minutes, then add 68% nitric acid 5ml, and then keep heating for 20 minutes, so that the particles are completely After decomposition, cool to room temperature, add 20 ml of hydrogen peroxide and acid to pH 7, then dilute the liquid with deionized water and pass the liquid through the injection. The tube was introduced into an ICP detector to measure the concentrations of aluminum, copper and zirconium.
8. The PC alloy material according to claim 2, wherein the warpage property of the PC alloy material adopts a secondary element to observe a deviation distance, a maximum warpage degree γ is less than 100, a surface tension is greater than 44 dyne, and a color deviation is less than 1.5%. .
9. A method of preparing a PC alloy material according to any one of claims 2 to 8, comprising the steps of:

   1) Weigh each component according to the formula content, and pre-baking polycarbonate, polyethylene terephthalate-1,4-cyclohexane dimethanol ester, fibrous filler, other additives Pre-drying treatment at 120 ° C ~ 130 ° C;

   2) pre-baking polycarbonate, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, fibrous filler, and other auxiliary agents are uniformly mixed by a high-mixer;

   3) a homogeneously mixed polycarbonate, polyethylene terephthalate-1,4-cyclohexanedimethanol ester, other auxiliaries, aluminum or aluminum oxides, copper salts or copper oxides and The zirconium or zirconium oxide is passed through the main feed port, and the fibrous filler is fed into the twin-screw extruder through the main feed port or the side feed port. The temperature setting temperature of the twin-screw extruder is 200 ° C. ~280 ° C;

   4) Cooling and pelletizing.
10. Use of the PC alloy material according to any one of claims 1 to 8 for the preparation of a thin-walled article.