A flame-retardant AS material for new energy vehicle battery bracket and its preparation method

Abstract

The present invention relates to the technical field of preparation of AS composite materials, and specifically discloses a flame-retardant AS material for a battery bracket of a new energy vehicle and a preparation method thereof. The flame-retardant AS material for a battery bracket of a new energy vehicle comprises the following raw material components in parts by weight: 60 to 80 parts of AS resin; 20 to 40 parts of PC resin; 10 to 20 parts of glass fiber; 30 to 40 parts of filler; 1 to 10 parts of compatibilizer; and 1 to 5 parts of lubricant. The present invention can make the prepared AS material have certain flame retardant properties by adding a filler composed of whisker silicon and diatomaceous earth. In particular, the addition of a modified filler obtained by modifying whisker silicon and diatomaceous earth by the above method can significantly improve the flame retardant properties of the AS material compared to the addition of an unmodified filler composed of whisker silicon and diatomaceous earth, and can also significantly improve the impact resistance of the prepared AS material.

Description

Technical Field

[0001] The present invention relates to the technical field of AS composite material preparation, and specifically discloses a flame-retardant AS material for a new energy vehicle battery bracket and a preparation method thereof. Background Art

[0002] Styrene-acrylonitrile copolymer, also known as AS resin, is a colorless and transparent thermoplastic resin. It has high temperature resistance, excellent gloss and chemical resistance, as well as excellent hardness, rigidity, dimensional stability and high load-bearing capacity, and is therefore widely used.

[0003] With the development of new energy vehicles, the demand for batteries is growing. However, the demand for battery holders, as an accessory for batteries, has also increased significantly. However, there is currently a lack of flame-retardant AS resin for new energy battery holders. Summary of the Invention

[0004] In order to overcome at least one of the technical problems existing in the prior art, the present invention provides a flame retardant AS material for a new energy vehicle battery bracket.

[0005] The technical solutions of the present invention are as follows:

[0006] A flame-retardant AS material for a new energy vehicle battery bracket comprises the following raw material components in parts by weight:

[0007] 60-80 parts of AS resin; 20-40 parts of PC resin; 10-20 parts of glass fiber; 30-40 parts of filler; 1-10 parts of compatibilizer; 1-5 parts of lubricant.

[0008] The inventors discovered during their research that, by adding fillers consisting of whisker silicon and diatomaceous earth, the prepared AS material can have certain flame retardant properties.

[0009] Preferably, the flame-retardant AS material for the new energy vehicle battery bracket comprises the following raw material components in parts by weight:

[0010] 70-80 parts of AS resin; 30-40 parts of PC resin; 10-15 parts of glass fiber; 30-35 parts of filler; 1-5 parts of compatibilizer; 1-3 parts of lubricant.

[0011] Most preferably, the flame-retardant AS material for the new energy vehicle battery bracket comprises the following raw material components in parts by weight:

[0012] 70 parts of AS resin; 30 parts of PC resin; 15 parts of glass fiber; 35 parts of filler; 5 parts of compatibilizer; 3 parts of lubricant.

[0013] Preferably, the filler consists of whisker silicon and diatomaceous earth.

[0014] More preferably, the weight ratio of the silicon whisker to the diatomaceous earth in the filler is 1:2-4.

[0015] Most preferably, the weight ratio of whisker silicon to diatomaceous earth in the filler is 1:3.

[0016] Preferably, the compatibilizer is maleic anhydride grafted POE-G-MAH.

[0017] Preferably, the lubricant is calcium stearate.

[0018] Preferably, the filler is a modified filler, and the modified filler is prepared by the following method:

[0019] (1) mixing silicon whiskers and diatomaceous earth, adding the mixture into water, and stirring evenly to obtain a dispersion;

[0020] (2) adding magnesium chloride and sodium hydroxide to the dispersion and stirring for 30 to 60 minutes to obtain a slurry;

[0021] (3) The modified filler is obtained by evaporating the slurry to dryness.

[0022] The inventors further discovered in their research that, in the AS material of the present invention, the addition of a modified filler obtained by modifying whisker silicon and diatomaceous earth by the above method can significantly improve the flame retardant properties of the prepared AS material, compared to the addition of an unmodified filler composed of whisker silicon and diatomaceous earth.

[0023] In addition, the inventors surprisingly discovered during their research that the addition of a modified filler obtained by modifying whisker silicon and diatomaceous earth by the above-mentioned method to the AS material of the present invention can significantly improve the impact resistance of the prepared AS material, compared to the addition of an unmodified filler composed of whisker silicon and diatomaceous earth.

[0024] More preferably, the weight ratio of the whisker silicon, diatomaceous earth and water is 1:2-4:10-20.

[0025] Most preferably, the weight ratio of whisker silicon, diatomaceous earth and water is 1:3:16.

[0026] More preferably, the weight ratio of the dispersion to the magnesium chloride and the sodium hydroxide is 100:4-4.5:1.8-2.2.

[0027] More preferably, the weight ratio of the dispersion to the magnesium chloride and the sodium hydroxide is 100:4.25:2.

[0028] Further preferably, sodium cocoyl isethionate is also added to the dispersion in step (2).

[0029] More preferably, in step (2), the weight ratio of the dispersion to sodium cocoyl isethionate is 1:1-2;

[0030] Most preferably, in step (2), the weight ratio of the dispersion to sodium cocoyl isethionate is 1:1.5.

[0031] The inventors further surprisingly discovered during their research that, during the preparation of the modified filler, adding sodium cocoyl isethionate to the dispersion can significantly improve the impact resistance of the AS material compared to the modified filler prepared without the addition of sodium cocoyl isethionate.

[0032] The present invention also provides a method for preparing the flame-retardant AS material for the new energy vehicle battery bracket, which comprises the following steps:

[0033] First, AS resin, PC resin, glass fiber, filler or modified filler, compatibilizer and lubricant are evenly mixed, and then put into a twin-screw extruder and extruded to obtain the flame-retardant AS material for the new energy vehicle battery bracket.

[0034] Beneficial Effects: The present invention provides a novel flame-retardant AS material for new energy vehicle battery brackets. By adding a filler composed of silicon whiskers and diatomaceous earth, the prepared AS material possesses certain flame retardancy. In particular, the addition of the modified filler, obtained by modifying silicon whiskers and diatomaceous earth using the aforementioned method, significantly improves the flame retardancy of the AS material compared to the addition of unmodified fillers composed of silicon whiskers and diatomaceous earth. The material also significantly improves its impact resistance. DETAILED DESCRIPTION

[0035] The present invention is further explained below with reference to specific examples, but the examples do not limit the present invention in any form. The raw materials in the following examples are all conventional raw materials that can be purchased or prepared by conventional methods by those skilled in the art.

[0036] Example 1 Preparation of flame-retardant AS material for new energy vehicle battery bracket

[0037] Raw materials by weight: 70 parts of AS resin; 30 parts of PC resin; 15 parts of glass fiber; 35 parts of filler; 5 parts of compatibilizer (maleic anhydride grafted POE-G-MAH); 3 parts of lubricant (calcium stearate);

[0038] The filler consists of whisker silicon and diatomaceous earth in a weight ratio of 1:3.

[0039] Preparation method: First, mix the above raw materials evenly, then put them into a twin-screw extruder and extrude them to obtain the flame-retardant AS material for the new energy vehicle battery bracket.

[0040] Example 2 Preparation of flame-retardant AS material for new energy vehicle battery bracket

[0041] Raw materials by weight: 70 parts of AS resin; 30 parts of PC resin; 15 parts of glass fiber; 35 parts of modified filler; 5 parts of compatibilizer (maleic anhydride grafted POE-G-MAH); 3 parts of lubricant (calcium stearate);

[0042] The modified filler is prepared by the following method:

[0043] (1) mixing silicon whiskers and diatomaceous earth, adding the mixture into water, and stirring evenly to obtain a dispersion; wherein the weight ratio of silicon whiskers, diatomaceous earth, and water is 1:3:16;

[0044] (2) adding magnesium chloride and sodium hydroxide to the dispersion and stirring for 40 minutes to obtain a slurry; wherein the weight ratio of the dispersion to the magnesium chloride and the sodium hydroxide is 100:4.25:2;

[0045] (3) The modified filler is obtained by evaporating the slurry to dryness.

[0046] Preparation method: First, mix the above raw materials evenly, then put them into a twin-screw extruder and extrude them to obtain the flame-retardant AS material for the new energy vehicle battery bracket.

[0047] Example 3 Preparation of flame-retardant AS material for new energy vehicle battery bracket

[0048] Raw materials by weight: 60 parts of AS resin; 40 parts of PC resin; 10 parts of glass fiber; 40 parts of modified filler; 10 parts of compatibilizer (maleic anhydride grafted POE-G-MAH); 1 part of lubricant (calcium stearate);

[0049] The modified filler is prepared by the following method:

[0050] (1) mixing silicon whiskers and diatomaceous earth, adding the mixture into water, and stirring evenly to obtain a dispersion; wherein the weight ratio of silicon whiskers, diatomaceous earth, and water is 1:4:20;

[0051] (2) adding magnesium chloride and sodium hydroxide to the dispersion and stirring for 30 minutes to obtain a slurry; wherein the weight ratio of the dispersion to the magnesium chloride and the sodium hydroxide is 100:4:1.8;

[0052] (3) The modified filler is obtained by evaporating the slurry to dryness.

[0053] Preparation method: First, mix the above raw materials evenly, then put them into a twin-screw extruder and extrude them to obtain the flame-retardant AS material for the new energy vehicle battery bracket.

[0054] Example 4 Preparation of flame-retardant AS material for new energy vehicle battery bracket

[0055] Raw materials by weight: 80 parts of AS resin; 20 parts of PC resin; 20 parts of glass fiber; 30 parts of modified filler; 1 part of compatibilizer (maleic anhydride grafted POE-G-MAH); 5 parts of lubricant (calcium stearate);

[0056] The modified filler is prepared by the following method:

[0057] (1) mixing silicon whiskers and diatomaceous earth, adding the mixture into water, and stirring evenly to obtain a dispersion; wherein the weight ratio of silicon whiskers, diatomaceous earth, and water is 1:2:10;

[0058] (2) adding magnesium chloride and sodium hydroxide to the dispersion and stirring for 60 minutes to obtain a slurry; wherein the weight ratio of the dispersion to the magnesium chloride and the sodium hydroxide is 100:4.5:2.2;

[0059] (3) The modified filler is obtained by evaporating the slurry to dryness.

[0060] Preparation method: First, mix the above raw materials evenly, then put them into a twin-screw extruder and extrude them to obtain the flame-retardant AS material for the new energy vehicle battery bracket.

[0061] Example 5 Preparation of flame-retardant AS material for new energy vehicle battery bracket

[0062] Raw materials by weight: 70 parts of AS resin; 30 parts of PC resin; 15 parts of glass fiber; 35 parts of modified filler; 5 parts of compatibilizer (maleic anhydride grafted POE-G-MAH); 3 parts of lubricant (calcium stearate);

[0063] The modified filler is prepared by the following method:

[0064] (1) mixing silicon whiskers and diatomaceous earth, adding the mixture into water, and stirring evenly to obtain a dispersion; wherein the weight ratio of silicon whiskers, diatomaceous earth, and water is 1:3:16;

[0065] (2) adding magnesium chloride and sodium hydroxide to the dispersion, and also adding sodium cocoyl isethionate, and stirring for 40 minutes to obtain a slurry; wherein the weight ratio of the dispersion to the magnesium chloride and sodium hydroxide is 100:4.25:2; and the weight ratio of the dispersion to the sodium cocoyl isethionate is 1:1.5;

[0066] (3) The modified filler is obtained by evaporating the slurry to dryness.

[0067] Preparation method: First, mix the above raw materials evenly, then put them into a twin-screw extruder and extrude them to obtain the flame-retardant AS material for the new energy vehicle battery bracket.

[0068] Experimental Example 1

[0069] The flame-retardant AS materials for new energy vehicle battery brackets prepared in Examples 1 to 5 were respectively injection-molded into specimens using an injection molding machine, and their flame retardancy rating (UL94) and notched impact strength (ISO 179-1-2000) were tested; the test results are shown in Table 1.

[0070] Table 1. Experimental results of flame retardant AS material performance for new energy vehicle battery bracket of the present invention

[0071] Flame retardant grade Notched impact strength Example 1 Flame-retardant AS material for new energy vehicle battery bracket V1 8.5KJ / m2 Example 2 Flame-retardant AS material for new energy vehicle battery bracket V0 12.6KJ / m2 Example 3 Flame-retardant AS material for new energy vehicle battery bracket V0 11.3KJ / m2 Example 4 Flame-retardant AS material for new energy vehicle battery bracket V0 11.9KJ / m2 Example 5 Flame-retardant AS material for new energy vehicle battery bracket V0 18.2KJ / m2

[0072] As can be seen from the experimental results in Table 1, the flame retardant AS materials for new energy vehicle battery brackets prepared in Examples 2 to 4 have significantly improved flame retardant grades compared with the flame retardant AS material for new energy vehicle battery brackets prepared in Example 1. This indicates that the addition of the modified filler obtained by modifying whisker silicon and diatomaceous earth by the method described in the present invention to the AS material of the present invention can significantly improve the flame retardant properties of the prepared AS material, compared with the addition of the unmodified filler composed of whisker silicon and diatomaceous earth.

[0073] As can be seen from the experimental results in Table 1, the notched impact strength of the flame-retardant AS materials for new energy vehicle battery brackets prepared in Examples 2 to 4 is significantly improved compared with the flame-retardant AS material for new energy vehicle battery brackets prepared in Example 1. This shows that the addition of the modified filler obtained by modifying whisker silicon and diatomaceous earth by the method described in the present invention to the AS material of the present invention can significantly improve the impact resistance of the prepared AS material compared to the addition of the unmodified filler composed of whisker silicon and diatomaceous earth.

[0074] As can be seen from the experimental results in Table 1, the notched impact strength of the flame-retardant AS material for a new energy vehicle battery bracket prepared in Example 5 is significantly improved compared to the flame-retardant AS material for a new energy vehicle battery bracket prepared in Example 2. This indicates that, during the preparation of the modified filler, the modified filler prepared by adding sodium cocoyl isethionate to the dispersion can further significantly improve the impact resistance of the AS material, compared to the modified filler prepared without the addition of sodium cocoyl isethionate.

Claims

1. A flame-retardant AS material for a new energy vehicle battery bracket, characterized in that: Includes the following weight Raw material components: 60-80 parts of AS resin; 20-40 parts of PC resin; 10-20 parts of glass fiber; 30-40 parts of filler; 1-10 parts of compatibilizer; 1-5 parts of lubricant; The filler is a modified filler, which is prepared by the following method: (1) Mix the whisker silicon and diatomaceous earth, add them into water, and stir evenly to obtain a dispersion; (2) Add magnesium chloride and sodium hydroxide to the dispersion and stir for 30-60 minutes to obtain a slurry; (3) Evaporating the slurry to dryness to obtain the modified filler; In step (2), sodium cocoyl isethionate is also added to the dispersion.

2. The flame-retardant AS material for the new energy vehicle battery bracket according to claim 1, characterized in that: Contains the following raw material components in parts by weight: 70-80 parts of AS resin; 30-40 parts of PC resin; 10-15 parts of glass fiber; 30-35 parts of filler; 1-5 parts of compatibilizer; 1-3 parts of lubricant.

3. The flame-retardant AS material for the new energy vehicle battery bracket according to claim 1, characterized in that: Contains the following raw material components in parts by weight: 70 parts of AS resin; 30 parts of PC resin; 15 parts of glass fiber; 35 parts of filler; 5 parts of compatibilizer; 3 parts of lubricant.

4. The flame-retardant AS material for the new energy vehicle battery bracket according to claim 1, characterized in that: The weight ratio of whisker silicon, diatomaceous earth and water is 1:2~4:10~20.

5. The flame-retardant AS material for the new energy vehicle battery bracket according to claim 1, characterized in that: The weight ratio of the dispersion to the magnesium chloride and the sodium hydroxide is 100:4-4.5:1.8-2.

2.

6. The flame-retardant AS material for the new energy vehicle battery bracket according to claim 5, characterized in that: The weight ratio of the dispersion to the magnesium chloride and the sodium hydroxide is 100:4.25:

2.

7. The method for preparing the flame-retardant AS material for the new energy vehicle battery bracket according to any one of claims 1 to 6, characterized in that: The following steps are included: First, AS resin, PC resin, glass fiber, filler, compatibilizer and lubricant are mixed evenly, and then put into a twin-screw extruder and extruded to obtain the flame-retardant AS material for the new energy vehicle battery bracket.