PC composite material with flame retardant effect and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, and particularly discloses a PC composite material with a flame retardant effect and a preparation method thereof. The PC composite material with the flame retardant effect comprises the following components in parts by weight: 80-120 parts of PC resin; 30 to 60 parts of ABS resin; 20-30 parts of a flame retardant; 5-15 parts of a compatilizer; and 20-30 parts of a wear-resistant filler. According to the invention, the wear-resistant filler composed of the quartz powder and the wollastonite powder is added into the PC composite material, so that the PC composite material not only has better flame retardant property, but also has better wear resistance.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a PC composite material with flame retardant effect and a preparation method thereof. Background Art

[0002] Polycarbonate (PC for short) is a high molecular polymer containing carbonate groups in its molecular chain. Due to its good mechanical properties and aging resistance as well as the particularity of the polycarbonate structure, it has become one of the commonly used engineering plastics.

[0003] Chinese invention patent CN201811513650.0 discloses a flame retardant extrusion grade PC / ABS composite material, which is composed of the following components calculated by weight: 42-74 parts of PC resin, 10-32 parts of ABS resin, 5-8 parts of compatible toughening agent, 5-8 parts of filler, 6-10 parts of flame retardant, and 0.1-0.3 parts of anti-dripping agent. Although it has good flame retardant properties, its wear resistance is poor; when used in parts that need to contact each other, its durability is poor; therefore, it needs further improvement. 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 PC composite material with flame retardant effect and a preparation method thereof.

[0005] The above technical problems to be solved by the present invention are solved by the following technical solutions:

[0006] The present invention first provides a PC composite material with flame retardant effect, which comprises the following components in parts by weight:

[0007] 80-120 parts of PC resin; 30-60 parts of ABS resin; 20-30 parts of flame retardant; 5-15 parts of compatibilizer; 20-30 parts of wear-resistant filler.

[0008] The invention adds wear-resistant fillers composed of quartz powder and wollastonite powder into the PC composite material, so that the PC composite material has better wear resistance.

[0009] Preferably, the PC composite material having a flame retardant effect comprises the following components in parts by weight:

[0010] 90-100 parts of PC resin; 40-50 parts of ABS resin; 20-30 parts of flame retardant; 5-10 parts of compatibilizer; 20-30 parts of wear-resistant filler.

[0011] Most preferably, the flame retardant PC composite material comprises the following components in parts by weight:

[0012] 100 parts of PC resin; 50 parts of ABS resin; 25 parts of flame retardant; 10 parts of compatibilizer; 25 parts of wear-resistant filler.

[0013] Preferably, the flame retardant consists of aluminum diethylphosphinate and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide.

[0014] Further preferably, the weight ratio of aluminum diethylphosphinate to 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in the flame retardant is 3 to 5:1.

[0015] Most preferably, the weight ratio of aluminum diethylphosphinate to 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in the flame retardant is 4:1.

[0016] Preferably, the wear-resistant filler consists of quartz powder and wollastonite powder.

[0017] Further preferably, the weight ratio of quartz powder to zircon powder in the wear-resistant filler is 2 to 4:1.

[0018] Most preferably, the weight ratio of quartz powder to wollastonite powder in the wear-resistant filler is 3:1.

[0019] Further preferably, the wear-resistant filler is a modified wear-resistant filler;

[0020] The modified wear-resistant filler is prepared by the following method:

[0021] (1) mixing quartz powder and zircon powder, adding the mixture into water and mixing by ultrasonication to obtain a quartz powder-wollastonite powder mixed solution;

[0022] (2) adding titanium tetrachloride to a mixture of quartz powder and wollastonite powder, followed by adding sodium hydroxide, stirring and reacting for 3 to 6 hours, and separating the solid to obtain a composite;

[0023] (3) The composite is calcined at 700-900° C. for 3-5 hours. After the calcination, the calcined solid is obtained to obtain the modified wear-resistant filler.

[0024] The inventors found in further research that, in the PC composite material of the present invention, adding a modified wear-resistant filler obtained by modifying quartz powder and wollastonite powder by the above method can greatly improve the wear resistance of the PC composite material, compared with adding unmodified quartz powder and wollastonite powder.

[0025] In addition, the inventors surprisingly found in the study that, in the PC composite material described in the present invention, adding a modified wear-resistant filler obtained by modifying quartz powder and wollastonite powder by the above method can also significantly improve the bending strength of the PC composite material compared to adding unmodified quartz powder and wollastonite powder.

[0026] Further preferably, in step (1), the weight ratio of the total weight of quartz powder and zircon powder to water is 1:5-10.

[0027] Most preferably, in step (1), the volume ratio of the total weight of quartz powder and zircon powder to water is 1:8.

[0028] More preferably, the weight ratio of the quartz powder-wollastonite powder mixture to titanium tetrachloride and sodium hydroxide is 5-10:0.1-0.2:0.1-0.2.

[0029] Most preferably, the weight ratio of the quartz powder-wollastonite powder mixture to titanium tetrachloride and sodium hydroxide is 8:0.19:0.16.

[0030] The present invention also provides a method for preparing the above-mentioned PC composite material with flame retardant effect, which comprises the following steps:

[0031] PC resin, ABS resin, flame retardant, compatibilizer and wear-resistant filler or modified wear-resistant filler are mixed evenly, and then melt-extruded through a twin-screw extruder to obtain the PC composite material with flame retardant effect.

[0032] Beneficial effects: The present invention provides a PC composite material with a novel composition and flame retardant effect; by adding wear-resistant fillers composed of quartz powder and wollastonite powder into the PC composite material, the PC composite material can have not only good flame retardant properties but also good wear resistance. DETAILED DESCRIPTION

[0033] The present invention is further explained below in conjunction with specific examples, but the examples do not limit the present invention in any form.

[0034] In the following embodiments

[0035] The PC resin is polycarbonate PC GSH2030R2 from Mitsubishi Engineering of Japan; the ABS resin is ABS resin with the brand PA-797 from Chi Mei of Taiwan, China; the compatibilizer is SEBS elastomer with the brand FG1901GT from Kraton of the United States; the other raw materials whose sources are not specified are all conventional raw materials that can be purchased by technicians in this field through conventional purchasing channels.

[0036] Example 1 Preparation of PC composite material with flame retardant effect

[0037] 100 parts of PC resin; 50 parts of ABS resin; 25 parts of flame retardant; 10 parts of compatibilizer; 25 parts of wear-resistant filler;

[0038] The flame retardant is composed of aluminum diethylphosphinate and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in a weight ratio of 4:1;

[0039] The wear-resistant filler is composed of quartz powder and wollastonite powder in a weight ratio of 3:1.

[0040] Preparation method: PC resin, ABS resin, flame retardant, compatibilizer and wear-resistant filler are mixed evenly, and then melt-extruded through a twin-screw extruder to obtain the PC composite material with flame retardant effect.

[0041] Example 2 Preparation of PC composite material with flame retardant effect

[0042] 80 parts of PC resin; 60 parts of ABS resin; 20 parts of flame retardant; 5 parts of compatibilizer; 30 parts of wear-resistant filler;

[0043] The flame retardant is composed of aluminum diethylphosphinate and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in a weight ratio of 3:1;

[0044] The wear-resistant filler is composed of quartz powder and wollastonite powder in a weight ratio of 4:1.

[0045] Preparation method: PC resin, ABS resin, flame retardant, compatibilizer and wear-resistant filler are mixed evenly, and then melt-extruded through a twin-screw extruder to obtain the PC composite material with flame retardant effect.

[0046] Example 3 Preparation of PC composite material with flame retardant effect

[0047] 120 parts of PC resin; 30 parts of ABS resin; 30 parts of flame retardant; 15 parts of compatibilizer; 20 parts of wear-resistant filler;

[0048] The flame retardant is composed of aluminum diethylphosphinate and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in a weight ratio of 5:1;

[0049] The wear-resistant filler is composed of quartz powder and wollastonite powder in a weight ratio of 2:1.

[0050] Preparation method: PC resin, ABS resin, flame retardant, compatibilizer and wear-resistant filler are mixed evenly, and then melt-extruded through a twin-screw extruder to obtain the PC composite material with flame retardant effect.

[0051] Example 4 Preparation of PC composite material with flame retardant effect

[0052] 100 parts of PC resin; 50 parts of ABS resin; 25 parts of flame retardant; 10 parts of compatibilizer; 25 parts of modified wear-resistant filler;

[0053] The flame retardant is composed of aluminum diethylphosphinate and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in a weight ratio of 4:1;

[0054] The modified wear-resistant filler is prepared by the following method:

[0055] (1) taking quartz powder and zircon powder, mixing them, adding them into water and mixing them evenly by ultrasonication to obtain a quartz powder-wollastonite powder mixed solution; wherein the weight ratio of the quartz powder to the zircon powder is 3:1; and the volume ratio of the total weight of the quartz powder and the zircon powder to water is 1:8;

[0056] (2) adding titanium tetrachloride to a quartz powder-wollastonite powder mixture, and then adding sodium hydroxide, stirring and reacting for 5 hours, and separating the solid to obtain a composite; wherein the weight ratio of the quartz powder-wollastonite powder mixture to titanium tetrachloride and sodium hydroxide is 8:0.19:0.16;

[0057] (3) The composite material is calcined at 800° C. for 4 h. After the calcination, the calcined solid is obtained to obtain the modified wear-resistant filler.

[0058] Preparation method: PC resin, ABS resin, flame retardant, compatibilizer and modified wear-resistant filler are mixed evenly, and then melt-extruded through a twin-screw extruder to obtain the PC composite material with flame retardant effect.

[0059] The flame retardant grade of the PC composite material with flame retardant effect prepared according to Examples 1 and 4 was tested according to the method in the UL-94 standard; the wear amount was tested according to the method in the GB / T3960-2023 standard; and the bending strength was tested according to the method in the ASTM D-790 standard. The test results are shown in Table 1.

[0060] Table 1. Test results of flame retardant PC composite materials

[0061]

[0062] It can be seen from the experimental results in Table 1 that the flame retardant PC composite materials prepared in Examples 1 and 4 have a flame retardant grade of V-0, which indicates that the flame retardant PC composite material of the present invention has good flame retardant properties.

[0063] From the experimental results in Table 1, it can be seen that the PC composite material with flame retardant effect prepared in Example 1 has a wear amount of only 0.48 mg, and has good wear resistance. This shows that the present invention can make the PC composite material have good wear resistance by adding wear-resistant fillers composed of quartz powder and wollastonite powder to the PC composite material.

[0064] It can be seen from the experimental results in Table 1 that the wear amount of the PC composite material with flame retardant effect prepared in Example 4 is much smaller than that in Example 1; this shows that: in the PC composite material described in the present invention, the modified wear-resistant filler obtained by modifying quartz powder and wollastonite powder by the method described in the present invention is added, which can greatly improve the wear resistance of the PC composite material compared with the unmodified wear-resistant filler composed of quartz powder and wollastonite powder.

[0065] It can also be seen from the experimental results in Table 1 that the flexural strength of the flame-retardant PC composite material prepared in Example 4 is much lower than that in Example 1; this indicates that the modified wear-resistant filler obtained by modifying quartz powder and wollastonite powder by the method of the present invention can also significantly improve the flexural strength of the PC composite material, compared with the unmodified wear-resistant filler composed of quartz powder and wollastonite powder.

Claims

1. A PC composite material with flame retardant effect, characterized in that: Contains the following components in parts by weight: 80-120 parts of PC resin; 30-60 parts of ABS resin; 20-30 parts of flame retardant; 5-15 parts of compatibilizer; 20-30 parts of wear-resistant filler.

2. The PC composite material with flame retardant effect according to claim 1, characterized in that: Contains the following components in parts by weight: 90-100 parts of PC resin; 40-50 parts of ABS resin; 20-30 parts of flame retardant; 5-10 parts of compatibilizer; 20-30 parts of wear-resistant filler. Most preferably, the flame retardant PC composite material comprises the following components in parts by weight: 100 parts of PC resin; 50 parts of ABS resin; 25 parts of flame retardant; 10 parts of compatibilizer; 25 parts of wear-resistant filler.

3. The PC composite material with flame retardant effect according to claim 1, characterized in that: The flame retardant consists of aluminum diethylphosphinate and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide.

4. The PC composite material with flame retardant effect according to claim 1, characterized in that: The weight ratio of diethyl aluminum phosphinate to 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in the flame retardant is 3-5:

1. Most preferably, the weight ratio of aluminum diethylphosphinate to 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in the flame retardant is 4:

1.

5. The PC composite material with flame retardant effect according to claim 1, characterized in that: The wear-resistant filler consists of quartz powder and wollastonite powder.

6. The PC composite material with flame retardant effect according to claim 1, characterized in that: The weight ratio of quartz powder to zircon powder in the wear-resistant filler is 2 to 4:

1. Most preferably, the weight ratio of quartz powder to wollastonite powder in the wear-resistant filler is 3:

1.

7. The PC composite material with flame retardant effect according to claim 1, characterized in that: The wear-resistant filler is a modified wear-resistant filler; The modified wear-resistant filler is prepared by the following method: (1) mixing quartz powder and zircon powder, adding the mixture into water and mixing by ultrasonication to obtain a quartz powder-wollastonite powder mixed solution; (2) adding titanium tetrachloride to a mixture of quartz powder and wollastonite powder, followed by adding sodium hydroxide, stirring and reacting for 3 to 6 hours, and separating the solid to obtain a composite; (3) The composite is calcined at 700-900° C. for 3-5 hours. After the calcination, the calcined solid is obtained to obtain the modified wear-resistant filler.

8. The PC composite material with flame retardant effect according to claim 7, characterized in that: In step (1), the weight ratio of the total weight of quartz powder and zircon powder to water is 1:5-10. Most preferably, in step (1), the volume ratio of the total weight of quartz powder and zircon powder to water is 1:

8.

9. The PC composite material with flame retardant effect according to claim 7, characterized in that: The weight ratio of the quartz powder-wollastonite powder mixed liquid to titanium tetrachloride and sodium hydroxide is 5-10:0.1-0.2:0.1-0.

2. Most preferably, the weight ratio of the quartz powder-wollastonite powder mixture to titanium tetrachloride and sodium hydroxide is 8:0.19:0.

16.

10. The method for preparing the flame retardant PC composite material according to any one of claims 1 to 9, characterized in that: The following steps are included: PC resin, ABS resin, flame retardant, compatibilizer and wear-resistant filler or modified wear-resistant filler are mixed evenly, and then melt-extruded through a twin-screw extruder to obtain the PC composite material with flame retardant effect.

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