WO2022188533A1

WO2022188533A1 - Pc/abs alloy, preparation method therefor and use thereof

Info

Publication number: WO2022188533A1
Application number: PCT/CN2022/070167
Authority: WO
Inventors: 袁好; 陈少军; 毕伟枫; 张艳霞; 胡致铨
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-03-10
Filing date: 2022-01-04
Publication date: 2022-09-15
Also published as: CN115073903A

Abstract

A PC/ABS alloy, a preparation method therefor and a use thereof. The PC/ABS alloy comprises the following components in parts by weight: 60-80 parts of polycarbonate, 20-40 parts of an ABS plastic, 3-5 parts of a compatibilizer, 0-4 parts of a lubricant, 2-5 parts of a red phosphorus masterbatch, and 5-10 parts of a toughener. The red phosphorus masterbatch comprises the following components, with the mass percentages of the components adding to 100%: 10%-50% of red phosphorus, and 50%-90% of a dispersant.

Description

PC/ABS alloy and its preparation method and application

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number of 202110262453.1 and the filing date of March 10, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

technical field

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

Background technique

Polycarbonate (PC) is a high molecular polymer containing carbonate groups in the molecular chain, which belongs to engineering plastics, but PC is prone to stress cracking and notch sensitivity. Bisphenol A polycarbonate in PC has high mechanical strength due to the large number of rigid groups in the main chain, and also has the characteristics of heat resistance, non-toxicity and transparency. The above properties make it the most widely used polycarbonate.

ABS plastic is a thermoplastic resin polymerized from three monomers, acrylonitrile (A), butadiene (B) and styrene (S). and poor weather resistance.

PC/ABS alloy combines the good heat resistance and mechanical strength of PC and the good processability and low temperature impact strength of ABS, and has excellent comprehensive properties such as non-toxicity, low water absorption, chemical stability and high cost performance. However, the flame retardant properties of PC/ABS are poor, and when used in electrical appliances, digital product casings, and automotive interior and exterior decorations, there will be potential safety hazards. Red phosphorus is a good inorganic flame retardant material; however, the dispersion effect in PC/ABS alloy is not ideal, so that a large amount of addition is required to achieve the desired flame retardant effect. /ABS alloys have a negative impact on the mechanical properties. Therefore, it is necessary to propose a new solution to solve the problem of using red phosphorus as a flame retardant for PC/ABS alloys.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present application provide a PC/ABS alloy and a preparation method and application thereof.

In a first aspect, the embodiments of the present application provide a PC/ABS alloy. In parts by weight, the PC/ABS alloy comprises the following components: 60-80 parts of polycarbonate; 20-40 parts of ABS plastic; 3-5 parts of compatibilizer; 0-4 parts of lubricant; 2 to 5 parts of red phosphorus masterbatch; 5 to 10 parts of toughening agent; wherein, based on the sum of the mass percentages of each component in the red phosphorus masterbatch as 100%, it contains the following components: red phosphorus 10%-50%; dispersant 50%-90%.

In the second aspect, the embodiments of the present application also provide a method for preparing a PC/ABS alloy, and the method for preparing the PC/ABS alloy includes the following steps: providing the polycarbonate, ABS plastic, compatibilizer, Lubricant, red phosphorus master batch and toughening agent; mixing the polycarbonate, ABS plastic, compatibilizer, lubricant, red phosphorus master batch and toughening agent to obtain a mixed material; The material is melted and extruded, and the PC/ABS alloy is obtained by drawing and pelletizing.

In a third aspect, the embodiments of the present application further provide applications of the above-mentioned PC/ABS alloys in communication base station equipment housings, mobile terminal housings, and automotive interiors.

Description of drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. For those of ordinary skill, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the schematic flow sheet of the preparation method of a kind of PC/ABS alloy that the embodiment of this application provides;

Fig. 2 is the schematic flow sheet of the preparation method of a kind of red phosphorus master batch provided by the embodiment of the application;

Fig. 3 is the scanning electron microscope picture of the red phosphorus master batch cross-section that implements the present embodiment 2 to provide;

Fig. 4 is the EDS spectrogram of the red phosphorus master batch section provided by the embodiment of the application 2;

Fig. 5 is the scanning electron microscope picture of the PC/ABS alloy section that implements the present embodiment 2 to provide;

FIG. 6 is an EDS energy spectrum diagram of the PC/ABS alloy section provided in Example 2 of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The flowcharts shown in the figures are for illustration only, and do not necessarily include all contents and operations/steps, nor do they have to be performed in the order described. For example, some operations/steps can also be decomposed, combined or partially combined, so the actual execution order may be changed according to the actual situation.

It should be understood that the terms used in the specification of the present application herein are for the purpose of describing particular embodiments only and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural unless the context clearly dictates otherwise.

The embodiments of the present application provide a PC/ABS alloy and a preparation method and application thereof. Among them, the PC/ABS alloy can be used in communication base station equipment casings, mobile terminal casings and car interiors. The mobile terminal can be used in electronic devices such as mobile phones, tablet computers, notebook computers, desktop computers, personal digital assistants and wearable devices. Equipment, communication base station equipment casings, mobile terminal casings and car interiors using the PC/ABS alloy as the casing material have good flame retardant performance, environmental protection effect and mechanical properties. In addition, it can also be used in the housing of household electrical appliances, medical equipment, aerospace equipment, and rail transit equipment.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and features in the embodiments may be combined with each other without conflict.

A PC/ABS alloy provided by the embodiments of the present application contains polycarbonate, ABS plastic, a compatibilizer, a lubricant, a red phosphorus master batch and a toughening agent. The parts by weight are: 60-80 parts of polycarbonate; 20-40 parts of ABS plastic; 3-5 parts of compatibilizer; 0-4 parts of lubricant; 2-5 parts of red phosphorus masterbatch; toughening agent 5 to 10 parts; wherein, the sum of the mass percentages of the components in the phosphorus master batch is 100%, and contains the following components: red phosphorus 10%-50%; dispersant 50%-90%. In some embodiments, the mass percentage content of red phosphorus in the red phosphorus masterbatch is 25%-45%, and the mass percentage content of the dispersant is 55%-75%.

In some embodiments, the polycarbonate is selected from bisphenol A type polycarbonate, such as bisphenol A type polycarbonate with model PC-110, etc., wherein the bisphenol A type polycarbonate with model PC-110 The melt index of carbonate is 10g/10min, and the heat distortion temperature is 136℃.

The ABS plastic in the embodiments of the present application may be ABS plastic with a model of PA-757 or the like. Among them, the melt index of the ABS plastic model PA-757 is 1.8g/10min, and the heat distortion temperature is 190℃.

In some embodiments, the compatibilizer is styrene-maleic anhydride copolymer (SMA), the styrene-maleic anhydride copolymer is a copolymer of styrene (S) and maleic anhydride (MA), styrene- The higher the MA content in the maleic anhydride copolymer, the better the dispersion effect of each component in the PC/ABS alloy. However, if the MA content is too high, the thermal stability of the compatibilizer will be affected. Therefore, styrene-maleic anhydride The graft ratio of maleic anhydride in the copolymer is 10%-30%. In some embodiments, the graft ratio of maleic anhydride in the styrene-maleic anhydride copolymer is 15%-20%. Red phosphorus masterbatch has a dispersing effect on red phosphorus. Combined with a compatibilizer with a graft ratio of maleic anhydride of 10% to 30%, the red phosphorus masterbatch can be compatibilized, compounded and re-dispersed to further improve the concentration of red phosphorus in Dispersion effects in PC/ABS alloys. In some embodiments, the styrene-maleic anhydride copolymer may be SMA-701A or the like.

In some embodiments, the lubricant includes an external lubricant and an internal lubricant; wherein, the external lubricant is selected from at least one of zinc stearate (ZnSt ₂ ), pentaerythritol stearate (PETS), etc.; the internal lubricant For the dioctyl phthalate (DOP) and so on.

In some embodiments, the toughening agent is selected from the group consisting of methacrylic acid-butadiene-styrene copolymer (SMA), polyolefin thermoplastic elastomer (POE), thermoplastic polyurethane elastomer (TPU), ethylene butyl acrylate (EBA) ), at least one of EPDM rubber, ethylene-vinyl acetate copolymer (EVA) and the like.

In some embodiments, the dispersant is selected from the group consisting of ethylene-octene copolymer grafted maleic anhydride (POE-g-MAH), maleic anhydride grafted polyethylene (PE-g-MAH), ethylene vinyl acetate copolymer grafted At least one of the three components of branch maleic anhydride (EVA-g-MAH).

On the basis of the above PC/ABS alloy, the embodiments of the present application further provide a preparation method of PC/ABS alloy.

Please refer to FIG. 1 , which is a schematic flowchart of a method for preparing a PC/ABS alloy according to an embodiment of the present application.

As shown in FIG. 1 , the preparation method of the PC/ABS alloy includes steps S101 to S103.

Step S101 , providing polycarbonate, ABS plastic, compatibilizer, lubricant, red phosphorus masterbatch and toughening agent.

In step S101, in parts by weight, among the provided raw material components, polycarbonate is 60-80 parts, ABS plastic is 20-40 parts, compatibilizer is 3-5 parts, and lubricant is 0-4 parts, 2-5 parts of red phosphorus masterbatch, 5-10 parts of toughening agent; in the red phosphorus masterbatch, the sum of the mass percentages of each component in the red phosphorus masterbatch is 100% Calculated, red phosphorus is 10%-50%; dispersant is 50%-90%. In some embodiments, the mass percentage content of red phosphorus in the red phosphorus masterbatch is 25%-45%, and the mass percentage content of the dispersant is 55%-75%. In some embodiments, the moisture content of polycarbonate is no greater than 0.02%, and the moisture content of ABS plastic is no greater than 0.02%. If the moisture content of polycarbonate and ABS plastic exceeds 0.02%, the polycarbonate and ABS plastic can be dried at 60℃-80℃ for 2h-10h respectively, so that the moisture content can meet the requirements.

In some embodiments, the polycarbonate is selected from bisphenol A type polycarbonate; the compatibilizer is a styrene-maleic anhydride copolymer (SMA) with a graft ratio of maleic anhydride of 10%-30%. In some embodiments, the graft ratio of maleic anhydride in the styrene-maleic anhydride copolymer is 15%-20%.

In some embodiments, the dispersant is selected from the group consisting of ethylene-octene copolymer grafted maleic anhydride (POE-g-MAH), maleic anhydride grafted polyethylene (PE-g-MAH), ethylene vinyl acetate copolymer grafted At least one of branch maleic anhydride (EVA-g-MAH).

In step S102, the polycarbonate, the ABS plastic, the compatibilizer, the lubricant, the red phosphorus master batch and the toughening agent are mixed to obtain a mixed material.

In step S012, the mixing treatment step of polycarbonate, ABS plastic, compatibilizer, lubricant, red phosphorus master batch and toughening agent can be placed in a mixing container for mixing, and the mixing time is 5min-20min , so that the components of polycarbonate, ABS plastic, compatibilizer, lubricant, toughener and red phosphorus masterbatch are fully mixed and the material uniformity is improved.

In step S103, the mixed material is subjected to melt extrusion treatment, and then subjected to drawing and granulation treatment to obtain a PC/ABS alloy.

In step S103, for the melt extrusion of the mixed material, the equipment used can be a twin-screw extruder, and during the melt extrusion process, the temperature of the melt extrusion needs to be controlled, so that the temperature of the entire melt extrusion is between 190°C- 225°C. In one embodiment, from the feed end to the discharge end of the melt extrusion, the melt extrusion is divided into a total of ten zones from the first zone of temperature control to the ten zones of temperature control, wherein the temperature of the first zone of temperature control is 190°C- 195°C, the temperature in the second zone is 190°C-195°C, the temperature in the third zone is 200°C-205°C, the temperature in the fourth zone is 200°C-205°C, and the temperature in the fifth zone is 210°C ℃-215℃, the temperature of the temperature control zone 6 is 210℃-215℃, the temperature of the temperature control zone 7 is 220℃-225℃, the temperature of the temperature control zone 8 is 220℃-225℃, the temperature of the temperature control zone 9 is 220℃-225℃ It is 210℃-220℃, and the temperature in the tenth zone of temperature control is 225℃. In the drawing process, the drawing is cooled to control the material forming, and the specific cooling method can be water cooling.

In one embodiment, with reference to Fig. 2, red phosphorus master batch is prepared according to the following method:

Step S201, providing red phosphorus and a dispersant.

In step S201, the red phosphorus is in a powder state, and the dispersant is selected from the group consisting of ethylene-octene copolymer grafted maleic anhydride (POE-g-MAH), maleic anhydride grafted polyethylene (PE-g-MAH), ethylene At least one of the three components of vinyl acetate copolymer grafted maleic anhydride (EVA-g-MAH). In some embodiments, the particle size of the red phosphorus is in the micro-nano scale, such as 2 nm-10 μm.

Step S202, kneading the red phosphorus and the dispersant to obtain a pre-dispersion.

The mixing of red phosphorus and dispersant can be carried out with an internal mixer, and the mixing time is 10min-20min. Through the close mixing, the red phosphorus has a good pre-dispersion effect, which lays a material foundation for the subsequent red phosphorus to be uniformly dispersed in PC/ABS.

Step S203, granulating the obtained pre-dispersion to obtain red phosphorus master batches.

The granulation treatment of the pre-dispersion can be carried out in a single-screw granulator. By making the red phosphorus and the dispersant into the red phosphorus masterbatch, on the one hand, the red phosphorus can be effectively dispersed, so that the red phosphorus masterbatch can be effectively dispersed through the red phosphorus masterbatch. The red phosphorus is dispersed in the PC/ABS alloy by means of the method; on the other hand, the precipitation resistance of the red phosphorus in the PC/ABS alloy can be improved due to the coating effect on the red phosphorus formed by the dispersant in the embodiment of the present application.

In order to better illustrate the technical solutions of the embodiments of the present application, further explanations are given below through several embodiments.

Example 1

A PC/ABS alloy and a preparation method thereof.

In parts by weight, the parts by weight of each component in the PC/ABS alloy are: 80 parts of polycarbonate, 20 parts of ABS plastic, 3 parts of compatibilizer, 2 parts of red phosphorus masterbatch and 5 parts of toughening agent.

Among them, the model of polycarbonate is PC-110, the model of ABS plastic is PA-757, the compatibilizer is styrene-maleic anhydride copolymer with maleic anhydride graft rate of 18%, and the toughening agent is methyl Acrylic acid-butadiene-styrene copolymer; the mass percentage content of red phosphorus in the red phosphorus masterbatch is 25%, the mass percentage content of the dispersant is 75%, and the dispersant is ethylene-octene copolymer grafted horse to acid anhydride.

The preparation method of the PC/ABS alloy provided by the present embodiment is as follows:

(1), provide 8kg PC-110, 2kg PA-757, 0.3kg styrene-maleic anhydride copolymer (SMA-701A), 0.2kg red phosphorus masterbatch, 0.5kg methacrylic acid-butyl Diene-styrene copolymer, wherein the mass content of moisture in PC-110 and PA-757 is controlled not to exceed 0.02%;

(2), place the provided PC-110, PA-757, styrene-maleic anhydride copolymer, methacrylic acid-butadiene-styrene copolymer and red phosphorus masterbatch in a mixing container for mixing treatment , the mixing time is 10min to obtain the mixed material;

(3), adopt twin-screw extruder to melt and extrude the mixed material, from the feed end to the discharge end of the twin-screw extruder, a total of ten temperature control zones are set, wherein the temperature of the first zone of temperature control is 190°C, the temperature in the second zone is 195°C, the temperature in the third zone is 200°C, the temperature in the fourth zone is 205°C, the temperature in the fifth zone is 210°C, and the temperature in the sixth zone is 215°C, the temperature of the seventh zone is 220°C, the temperature of the eighth zone is 225°C, the temperature of the ninth zone is 215°C, and the temperature of the tenth zone is 225°C. After the mixed material is extruded, it is granulated through a strand (water cooling after stranding) and a pelletizer to obtain a PC/ABS alloy.

Example 2

A PC/ABS alloy and a preparation method thereof.

In parts by weight, the parts by weight of each component in the PC/ABS alloy are: 70 parts of polycarbonate, 30 parts of ABS plastic, 3 parts of compatibilizer, 1 part of external lubricant, 3 parts of internal lubricant, red phosphorus mother 3 parts of grains, 5 parts of toughening agent.

Among them, the model of polycarbonate is PC-110, the model of ABS plastic is PA-757, the compatibilizer is styrene-maleic anhydride copolymer with maleic anhydride grafting rate of 18%; the external lubricant is stearin Zinc acid and internal lubricant are dioctyl phthalate; the mass percentage content of red phosphorus in the red phosphorus master batch is 25%, the mass percentage content of dispersant is 75%, and the dispersant is ethylene-octene copolymer Grafted maleic anhydride; toughener is methacrylic acid-butadiene-styrene copolymer.

(1), provide the PC-110 of 7kg, the PA-757 of 3kg, the styrene-maleic anhydride copolymer (SMA-701A) of 0.3kg, the zinc stearate of 0.1kg, the two phthalates of 0.3kg Octyl ester, 0.3kg of red phosphorus master batch, 0.5kg of methacrylic acid-butadiene-styrene copolymer, wherein, the mass content of moisture in PC-110 and PA-757 is controlled not to exceed 0.02%;

(2), will provide PC-110, PA-757, styrene-maleic anhydride copolymer, methacrylic acid-butadiene-styrene copolymer, zinc stearate, dioctyl phthalate, And the red phosphorus master batch is placed in the mixing container to carry out the mixing process, and the mixing time is 10min to obtain the mixed material;

Example 3

A PC/ABS alloy and a preparation method thereof.

In parts by weight, the parts by weight of each component in the PC/ABS alloy are: 60 parts of polycarbonate, 40 parts of ABS plastic, 3 parts of compatibilizer, 0.5 part of external lubricant, 1 part of internal lubricant, red phosphorus mother 4 parts of grains, 10 parts of toughening agent.

Among them, the model of polycarbonate is PC-110, the model of ABS plastic is PA-757, the compatibilizer is styrene-maleic anhydride copolymer with maleic anhydride grafting rate of 18%; the external lubricant is stearin Zinc acid; the internal lubricant is dioctyl phthalate; the mass percentage of red phosphorus in the red phosphorus masterbatch is 25%, the mass percentage of the dispersant is 75%, and the dispersant is ethylene-octene copolymerization Grafted maleic anhydride; toughener is methacrylic acid-butadiene-styrene copolymer.

(1), provide 6kg PC-110, 4kg PA-757, 0.3kg styrene-maleic anhydride copolymer (SMA-701A), 0.05kg dioctyl phthalate, 0.1kg stearin Zinc acid, 0.4kg of red phosphorus masterbatch, 1kg of methacrylic acid-butadiene-styrene copolymer, wherein, the mass content of moisture in PC-110 and PA-757 is controlled not to exceed 0.02%;

(2), PC-110, PA-757, styrene-maleic anhydride copolymer, dioctyl phthalate, zinc stearate, red phosphorus masterbatch and methacrylic acid-butadiene- The styrene copolymer is placed in a mixing container for mixing treatment, and the mixing time is 10 min to obtain a mixed material;

In order to verify the flame retardant properties and mechanical properties of the PC/ABS alloys provided in Examples 1 to 3 of the present application, the following comparative examples are also provided.

Comparative Example 1

A PC/ABS alloy and a preparation method thereof.

In terms of parts by weight, the parts by weight of each component in the PC/ABS alloy are: 70 parts of polycarbonate, 30 parts of ABS plastic and 5 parts of toughening agent.

Among them, the model of polycarbonate is PC-110, the model of ABS plastic is PA-757, and the toughening agent is methacrylic acid-butadiene-styrene copolymer.

(1), provide the PC-110 of 7kg, the PA-757 of 3kg, the methacrylic acid-butadiene-styrene copolymer of 0.5kg, wherein, control the mass content of moisture in PC-110 and PA-757 is not more than 0.02%;

(2), the provided PC-110, PA-757, methacrylic acid-butadiene-styrene copolymer are placed in the mixing container to carry out the mixing process, and the mixing time is 10min to obtain the mixed material;

Comparative Example 2

A PC/ABS alloy and a preparation method thereof.

In parts by weight, the parts by weight of each component in the PC/ABS alloy are: 70 parts of polycarbonate, 30 parts of ABS plastic, 5 parts of compatibilizer, 10 parts of resorcinol (diphenyl phosphate) (RDP) parts, 5 parts of toughening agent.

Among them, the model of polycarbonate is PC-110, the model of ABS plastic is PA-757, the compatibilizer is styrene-maleic anhydride copolymer with maleic anhydride graft rate of 18%, and the toughening agent is methyl Acrylic-butadiene-styrene copolymer.

(1), provide 7kg PC-110, 3kg PA-757, 0.5kg styrene-maleic anhydride copolymer (SMA-701A), 1kg resorcinol (diphenyl phosphate), 0.5kg The methacrylic acid-butadiene-styrene copolymer, wherein, the mass content of moisture in the control PC-110 and PA-757 does not exceed 0.02%;

(2), place the provided PC-110, PA-757, styrene-maleic anhydride copolymer, resorcinol (diphenyl phosphate), methacrylic acid-butadiene-styrene copolymer into mixing Carry out the mixing treatment in the container, and the mixing time is 10min to obtain the mixed material;

Comparative Example 3

A PC/ABS alloy, the PC/ABS alloy is a pellet with the model HAC8265FR.

Performance verification

In the following, the flame retardant properties and mechanical properties of Example 1-Example 3 and Comparative Example 1-Comparative Example 3 are verified.

Among them, the test standards and test conditions for flame retardant properties and mechanical properties are shown in Table 1. According to the test standards and test conditions in Table 1, the PC provided by Example 1-Example 3 and Comparative Example 1-Comparative Example 3 was obtained Flame retardant properties and mechanical properties of /ABS alloys.

Table 1 Test Standard

性能performance	测试标准standard test	条件condition
阻燃等级Flammability rating	UL94UL94	1.6mm，3.2mm1.6mm, 3.2mm
拉伸强度Tensile Strength	GB/T 1043.1-2008GB/T 1043.1-2008	4mm，20mm/min4mm, 20mm/min
断裂拉伸应变tensile strain at break	GB/T 1040.2-2006GB/T 1040.2-2006	4mm，20mm/min4mm, 20mm/min
拉伸弹性模量Tensile elastic modulus	GB/T 1040.2-2006GB/T 1040.2-2006	4mm，20mm/min4mm, 20mm/min
拉伸屈服应力Tensile yield stress	GB/T 1040.2-2006GB/T 1040.2-2006	4mm，20mm/min4mm, 20mm/min

Table 2 PC/ABS alloy test standards

As can be seen from Table 2, the flame retardant grades of both Examples 1 and 2 have reached 1.6mm V-0, reaching the highest level of flame retardant. In Example 3, due to the addition of too much toughening agent The flame retardant grade is reduced by one grade, and the mechanical properties are reduced to a certain extent; the comparative example 1 without flame retardant has no flame retardant effect, and the comparative example 2 uses RDP organic flame retardant, its flame retardant grade does not meet the standard, the comparative example 3 is the currently used PC/ABS alloy with a relatively high flame retardant content, which can reach a flame retardant grade of 1.6mm V-0 because of its high flame retardant content. It can be seen that the PC/ABS alloys in the examples of the present application, due to the use of red phosphorus master batches as flame retardants, can also show strong tensile strength and tensile strain at break while reducing the amount of red phosphorus used. , tensile modulus of elasticity and tensile yield stress; in addition, because red phosphorus does not pollute the environment, PC/ABS alloy has good environmental performance.

Scanning electron microscope (SEM) and EDS energy spectrum analysis were performed on the cross section of the red phosphorus master batch provided in Example 2, and the results are shown in Figures 3 and 4 . It can be seen from Figure 3 and Figure 4 that the phosphorus element has good dispersibility in the red phosphorus masterbatch.

Scanning electron microscope (SEM) and EDS energy spectrum analysis were performed on the cross section of the PC/ABS alloy provided in Example 2, and the results are shown in FIG. 5 and FIG. 6 . It can be seen from Figure 5 and Figure 6 that the red phosphorus masterbatch and red phosphorus have good dispersibility in PC/ABS alloy.

From the results of Examples 1 to 3, Comparative Examples 1 to 3, and SEM and EDS, it can be seen that the PC/ABS alloys provided in the examples of the present application have less red phosphorus content, uniform red phosphorus dispersion, and resistance to resistance. The flame retardant grade reaches 1.6mm V-0, good environmental performance and good mechanical properties, which solves the problem that the existing PC/ABS alloy directly uses red phosphorus as a flame retardant and needs to add a large amount to have an ideal flame retardant effect. The problem that the mechanical properties of PC/ABS alloys deteriorate due to the large amount of red phosphorus added is solved.

In the PC/ABS alloy provided in the examples of this application, since red phosphorus and a dispersant are added to the PC/ABS alloy to form a red phosphorus master batch, the addition amount of red phosphorus can not only be reduced, but also the red phosphorus can be uniformly dispersed in the PC/ABS alloy. In the /ABS alloy, it can also have good flame retardant effect and environmental protection effect, and will not cause the mechanical properties of the PC/ABS alloy to deteriorate significantly.

It should be understood that, as used in this specification and the appended claims, the term "and/or" refers to and including any and all possible combinations of one or more of the associated listed items. It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or system comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or system. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system that includes the element.

The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments. The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed in the present application. Modifications or substitutions shall be covered by the protection scope of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A PC/ABS alloy, wherein, in parts by weight, the PC/ABS alloy comprises the following components:

Wherein, the sum of the mass percentages of the components in the red phosphorus master batch is 100%, and contains the following components:

Red phosphorus 10%-50%;

Dispersant 50%-90%.
The PC/ABS alloy according to claim 1, wherein, the sum of the mass percentages of each component in the red phosphorus master batch is 100%, and contains the following components:

Red phosphorus 25%-45%;

Dispersant 55%-75%.
The PC/ABS alloy according to claim 1 or 2, wherein the dispersant is selected from the group consisting of ethylene-octene copolymer grafted maleic anhydride, maleic anhydride grafted polyethylene, and ethylene vinyl acetate copolymer grafted horses At least one of leic anhydride.
The PC/ABS alloy according to claim 1, wherein the compatibilizer is a styrene-maleic anhydride copolymer, and the graft ratio of maleic anhydride in the styrene-maleic anhydride copolymer is 10% -30%.
The PC/ABS alloy according to claim 4, wherein the graft ratio of maleic anhydride in the styrene-maleic anhydride copolymer is 15%-20%.
The PC/ABS alloy according to claim 1, wherein the polycarbonate is a bisphenol A polycarbonate;

and / or,

The lubricant includes an external lubricant and an internal lubricant; the external lubricant is selected from at least one of zinc stearate and pentaerythritol stearate; the internal lubricant is dioctyl phthalate;

and / or,

The toughening agent is selected from methacrylic acid-butadiene-styrene copolymer, polyolefin thermoplastic elastomer, thermoplastic polyurethane elastomer, ethylene butyl acrylate, ethylene propylene diene rubber, ethylene-vinyl acetate copolymer at least one of.
A preparation method of PC/ABS alloy, comprising the following steps:

Provide polycarbonate, ABS plastic, compatibilizer, lubricant, red phosphorus master batch and toughening agent according to any one of claims 1 to 6;

The polycarbonate, ABS plastic, compatibilizer, lubricant, red phosphorus master batch and toughening agent are mixed to obtain a mixed material;

The mixed material is melted and extruded, and subjected to drawing and granulation to obtain PC/ABS alloy.
The preparation method of PC/ABS alloy according to claim 7, wherein the melt extrusion comprises ten temperature control zones from a temperature control zone 1 to a temperature control zone 10 zone, wherein the temperature control zone 1 and the temperature control zone 2 are The temperature is 190℃-195℃; the temperature of temperature control zone 3 and temperature control zone 4 are both 200℃-205℃; the temperature of temperature control zone 5 and temperature control zone 6 are both 210℃-215℃; temperature control zone 7 The temperature of zone 8 and temperature control zone 8 are both 220°C-225°C; the temperature of zone 9 temperature control zone is 210°C-220°C; the temperature of zone 10 temperature control zone is 225°C.
The preparation method of PC/ABS alloy according to claim 7, wherein, described red phosphorus master batch adopts following method to prepare:

Red phosphorus and dispersant are provided;

The red phosphorus and the dispersant are kneaded to obtain a pre-dispersion;

The pre-dispersion is granulated to obtain red phosphorus master batches.
The application of the PC/ABS alloy according to any one of claims 1 to 6 in communication base station equipment casings, mobile terminal casings, and automobile interiors.