Scratch-resistant flame-retardant PC / ABS alloy material and preparation method thereof

Abstract

The invention provides a scratch-resistant flame-retardant PCABS alloy material and a preparation method thereof.The preparation method comprises the steps that a mixture of ABS resin, a brominated flame retardant and a flame retardant synergist is stirred through a high-speed mixer and mixed to be uniform, and compound flame-retardant master batches are prepared through an internal mixer; a mixture of the ABS resin, the PC resin, the compound flame retardant master batch, the scratch-resistant agent, the compatilizer, the main antioxidant, the auxiliary antioxidant and the acid acceptor is stirred and uniformly mixed by using a high-speed mixer, extruded and granulated by using a double-screw extruder, and dried in a drying oven to obtain the scratch-resistant flame-retardant PC / ABS alloy material. The compound flame-retardant master batch is prepared by adding the flame retardant, so that the flame-retardant property of the product can be improved; by adding the acrylic scratch-resistant agent, the surface hardness of the product can be improved, and the scratch resistance of the product is improved; by adding the compatilizer, the compatibility of the PC / ABS alloy can be improved, and the mechanical property, flame retardant property and gloss property of the product can be balanced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of high polymer materials, and particularly relates to a scratch-resistant flame-retardant PC / ABS alloy material and a preparation method thereof. BACKGROUND

[0002] PC / ABS alloy material combines the high impact resistance and heat resistance of polycarbonate (PC) and the excellent processing performance and surface finish of acrylonitrile-butadiene-styrene copolymer (ABS), and is widely used in the fields of electronics, automobiles, buildings and the like. Although PC / ABS alloy has various advantages, in specific applications, such as frequent contact or external force, there is a certain gap in the scratch resistance of PC / ABS alloy material in actual use process with sprayed parts, the surface of which is easily scratched, affecting the appearance, and the scratch contrast is more obvious especially in high blackness. At the same time, the performance of traditional PC / ABS alloy needs to be improved in the environment with high flame-retardant requirements.

[0003] Flame-retardant ABS / PC alloy has been widely used in the industries of electronic appliances, household appliances, automobile manufacturing and the like, and the flame-retardant performance of products can be effectively improved by adding flame retardants. The commonly used flame retardant is a halogen-based flame retardant system, which has the advantages of good flame-retardant effect, small addition amount, small influence on other performances of products and low price. Improving the scratch resistance of the alloy is a popular research direction in the market at present, and the scratch resistance of the material can be improved from two aspects of increasing the hardness of the material itself and reducing the surface friction coefficient of the product.

[0004] Chinese Patent Application CN103724968A discloses a high-heat-resistant high-rigid halogen-free flame-retardant scratch-resistant PC / ABS alloy material and a preparation method thereof. The blend modification increases the rigidity by adding inorganic fillers, the scratch resistance is improved by adding silicone oil-based scratch-resistant agent, and the flame retardance is improved by adding halogen-free flame retardant. The silicone oil-based scratch-resistant agent is a non-polar substance, while the alloy material is a polar substance. If the two are blended without treatment, the compatibility is poor, which will affect the toughness and gloss of the product, and therefore the product has the defects of poor gloss, poor toughness and insufficient scratch resistance.

[0005] Chinese Patent Application CN114316551A discloses a high-strength scratch-resistant PC / ABS alloy material and a preparation method thereof. The alloy scratch resistance is improved by using scratch-resistant PC resin, the flame retardance is improved by adding flame retardant, and the strength is improved by adding glass fiber, which can effectively improve the surface hardness and scratch resistance of the alloy material. Directly using scratch-resistant PC resin not only increases the product cost, but also reduces the scratch resistance of the scratch-resistant agent after two extrusion granulations.

[0006] When PC / ABS alloy is blended and modified, the product has poor compatibility, which leads to the unbalanced comprehensive performance of the product. SUMMARY

[0007] (I) Technical problems to be solved

[0008] The application provides a scratch-resistant flame-retardant PC / ABS alloy material and a preparation method thereof, and aims at solving the technical problem of how to significantly improve the scratch resistance and flame-retardant performance of the material.

[0009] (II) Technical solutions

[0010] In order to solve the above technical problem, the application provides a preparation method of a scratch-resistant flame-retardant PC / ABS alloy material, which comprises the following steps:

[0011] S1. Using a high-speed mixer to stir the mixture of ABS resin, bromine-based flame retardant and flame retardant synergist, and uniformly mixing, using a banbury mixer to prepare a compounded flame retardant master batch;

[0012] S2. Using a high-speed mixer to stir the mixture of ABS resin, PC resin, compounded flame retardant master batch, scratch-resistant agent, compatibilizer, main antioxidant, auxiliary antioxidant and acid absorbent, and uniformly mixing, extruding and granulating through a double-screw extruder, and drying in an oven to obtain a scratch-resistant flame-retardant PC / ABS alloy material.

[0013] Further, in step S1, the raw material components are weighed as follows: 15-25 parts of ABS resin, 60-70 parts of bromine-based flame retardant and 10-15 parts of flame retardant synergist; and high-speed stirring is performed for 3 minutes using a high-speed mixer.

[0014] Further, in step S2, the raw material components are weighed as follows: 20-30 parts of ABS resin, 50-60 parts of PC resin, 15-20 parts of compounded flame retardant master batch, 10-20 parts of scratch-resistant agent, 5-10 parts of compatibilizer, 0.1 part of main antioxidant, 0.2 part of auxiliary antioxidant and 0.2 part of acid absorbent.

[0015] Further, the melt mass flow rate of the ABS resin is 20-50 g / min under the test conditions of 220 DEG C and 10 kg; and the melt mass flow rate of the PC resin is 10-50 g / min under the test conditions of 220 DEG C and 10 kg.

[0016] Further, the bromine-based flame retardant is one or both of brominated triazine and decabromodiphenyl ethane; and the flame retardant synergist is antimony trioxide.

[0017] Further, the main antioxidant is one or more of antioxidants 1010 and 1076; and the auxiliary antioxidant is one or more of antioxidants 626 and 168.

[0018] Further, the acid-adsorbing agent is one or more of zinc stearate and calcium stearate; the compatibilizing agent is one or more of SMA, MBS, and PE-g-MAH; and the scratch-resistant auxiliary agent is one or more of fumed nano-silica and nano-hydroxyl acicular apatite.

[0019] Further, in step S2, the temperature of each temperature zone of the twin-screw extruder is as follows: 170 DEG C for the first section, 190 DEG C for the second section, 200 DEG C for the third section, 210 DEG C for the fourth section, 210 DEG C for the fifth section, 210 DEG C for the sixth section, 210 DEG C for the seventh section, 210 DEG C for the eighth section, 200 DEG C for the ninth section, 190 DEG C for the tenth section, and 170 DEG C for the die head.

[0020] Further, in step S2, the temperature of each temperature zone of the twin-screw extruder is as follows: 170 DEG C for the first section, 190 DEG C for the second section, 200 DEG C for the third section, 210 DEG C for the fourth section, 210 DEG C for the fifth section, 210 DEG C for the sixth section, 210 DEG C for the seventh section, 210 DEG C for the eighth section, 200 DEG C for the ninth section, 190 DEG C for the tenth section, and 170 DEG C for the die head.

[0021] In addition, the present application also provides a scratch-resistant flame-retardant PC / ABS alloy material prepared by the above method.

[0022] (III) Beneficial Effects

[0023] The present application provides a scratch-resistant flame-retardant PC / ABS alloy material and a preparation method thereof, which comprises stirring a mixture of ABS resin, bromine-based flame retardant, and flame retardant synergist using a high-speed mixer, uniformly mixing, and preparing a compounded flame-retardant master batch using a banbury mixer; stirring a mixture of ABS resin, PC resin, compounded flame-retardant master batch, scratch-resistant agent, compatibilizing agent, main antioxidant, auxiliary antioxidant, and acid-adsorbing agent using a high-speed mixer, uniformly mixing, and extruding and granulating through a twin-screw extruder, and then drying in an oven to obtain the scratch-resistant flame-retardant PC / ABS alloy material. The present application can improve the flame-retardant performance of the product by adding the flame retardant and preparing the compounded flame-retardant master batch, can improve the surface hardness of the product and increase the scratch resistance of the product by adding the acrylic scratch-resistant agent, and can improve the compatibility of the PC / ABS alloy, balance the mechanical properties, flame-retardant performance, and gloss performance of the product by adding the compatibilizing agent. DETAILED DESCRIPTION

[0024] In order to make the purpose, content and advantages of the present application clearer, the specific embodiments of the present application are described in further detail below with reference to examples.

[0025] Example 1

[0026] The raw material components were weighed according to the mass fraction: 20 parts of ABS resin, 70 parts of brominated triazine, and 10 parts of antimony trioxide; the mixture was stirred at high speed using a high-speed mixer for 3 minutes, uniformly mixed, and a compounded flame-retardant master batch was prepared using a banbury mixer.

[0027] Take the raw material components by mass fraction: ABS resin 20 parts, PC resin 55.5 parts, compound flame retardant masterbatch 17 parts, scratch-resistant agent nano-hydroxyl acicular apatite 2 parts, compatibilizer PE-g-MAH 5 parts, primary antioxidant 1076 0.1 part, auxiliary antioxidant 168 0.2 part, acid absorbent calcium stearate 0.2 part; high-speed mixer mixes 3 minutes to make each component mixed uniformly, and the mixed material is extruded and granulated by a double screw extruder to obtain scratch-resistant flame-retardant PC / ABS alloy material, which is dried in an oven at 75℃ for 6 hours.

[0028] Example 2

[0029] Take the raw material components by mass fraction: ABS resin 20 parts, decabromodiphenyl ethane 65 parts, antimony trioxide 15 parts, use high-speed mixer to stir the above mixture at high speed for 3 minutes, mix and prepare compound flame retardant masterbatch by using an internal mixer;

[0030] Take the raw material components by mass fraction: ABS resin 20 parts, PC resin 55.5 parts, compound flame retardant masterbatch 17 parts, scratch-resistant agent nano-hydroxyl acicular apatite 3 parts, compatibilizer SMA 4 parts, primary antioxidant 1076 0.1 part, auxiliary antioxidant 168 0.2 part, acid absorbent calcium stearate 0.2 part; high-speed mixer mixes 3 minutes to make each component mixed uniformly, and the mixed material is extruded and granulated by a double screw extruder to obtain scratch-resistant flame-retardant PC / ABS alloy material, which is dried in an oven at 75℃ for 6 hours.

[0031] Example 3

[0032] Take the raw material components by mass fraction: ABS resin 17 parts, decabromodiphenyl ethane 30 parts, brominated triazine 43 parts, antimony trioxide 10 parts, use high-speed mixer to stir the above mixture at high speed for 3 minutes, mix and prepare compound flame retardant masterbatch by using an internal mixer;

[0033] Take the raw material components by mass fraction: ABS resin 20 parts, PC resin 55.5 parts, compound flame retardant masterbatch 17 parts, scratch-resistant agent nano-hydroxyl acicular apatite 2 parts, compatibilizer MBS 5 parts, primary antioxidant 1076 0.1 part, auxiliary antioxidant 168 0.2 part, acid absorbent zinc stearate 0.2 part; high-speed mixer mixes 3 minutes to make each component mixed uniformly, and the mixed material is extruded and granulated by a double screw extruder to obtain scratch-resistant flame-retardant PC / ABS alloy material, which is dried in an oven at 75℃ for 6 hours.

[0034] Example 4

[0035] The raw material components are weighed according to the mass fraction: ABS resin 15 parts, decabromodiphenyl ethane 20 parts, bromine triazine 50 parts, antimony trioxide 15 parts, and the mixture is stirred at high speed for 3 minutes using a high-speed mixer, and is uniformly mixed and prepared into a compounded flame-retardant master batch using a banbury mixer;

[0036] The raw material components are weighed according to the mass fraction: ABS resin 20 parts, PC resin 55.5 parts, compounded flame-retardant master batch 17 parts, scratch-resistant agent fumed nano-silicon dioxide 2 parts, compatibilizer PE-g-MAH 5 parts, main antioxidant 1010 0.1 part, auxiliary antioxidant 626 0.2 part, and acid absorbent calcium stearate 0.2 part; the components are uniformly mixed by high-speed mixing for 3 minutes, and the mixed material is extruded and granulated by a twin-screw extruder to obtain a scratch-resistant flame-retardant PC / ABS alloy material, which is dried in an oven at 75 DEG C for 6 hours.

[0037] Example 5

[0038] The raw material components are weighed according to the mass fraction: ABS resin 15 parts, decabromodiphenyl ethane 20 parts, bromine triazine 50 parts, antimony trioxide 15 parts, and the mixture is stirred at high speed for 3 minutes using a high-speed mixer, and is uniformly mixed and prepared into a compounded flame-retardant master batch using a banbury mixer;

[0039] The raw material components are weighed according to the mass fraction: ABS resin 20 parts, PC resin 55.5 parts, compounded flame-retardant master batch 17 parts, scratch-resistant agent fumed nano-silicon dioxide 2 parts, compatibilizer PE-g-MAH 5 parts, main antioxidant 1010 0.1 part, auxiliary antioxidant 626 0.2 part, and acid absorbent calcium stearate 0.2 part; the components are uniformly mixed by high-speed mixing for 3 minutes, and the mixed material is extruded and granulated by a twin-screw extruder to obtain a scratch-resistant flame-retardant PC / ABS alloy material, which is dried in an oven at 75 DEG C for 6 hours.

[0040] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A method for preparing a scratch-resistant and flame-retardant PC / ABS alloy material, characterized in that, The preparation method includes the following steps: S1. Use a high-speed mixer to stir the mixture of ABS resin, brominated flame retardant and flame retardant synergist, mix evenly, and use an internal mixer to prepare compound flame retardant masterbatch; S2. Use a high-speed mixer to stir the mixture of ABS resin, PC resin, compound flame retardant masterbatch, scratch resistant agent, compatibilizer, main antioxidant, auxiliary antioxidant and acid scavenger until uniformly mixed. Extrude and granulate through a twin-screw extruder, and dry in an oven to obtain scratch-resistant and flame-retardant PC / ABS alloy material.

2. The method for preparing scratch-resistant and flame-retardant PC / ABS alloy material as described in claim 1, characterized in that, In step S1, weigh the following raw material components according to the following mass parts: 15-25 parts of ABS resin, 60-70 parts of bromine flame retardant, and 10-15 parts of flame retardant synergist; and stir at high speed for 3 minutes using a high-speed mixer.

3. The method for preparing scratch-resistant and flame-retardant PC / ABS alloy material as described in claim 1, characterized in that, In step S2, the following raw material components are weighed according to the following mass parts: 20-30 parts of ABS resin, 50-60 parts of PC resin, 15-20 parts of compound flame retardant masterbatch, 10-20 parts of scratch resistant agent, 5-10 parts of compatibilizer, 0.1 parts of main antioxidant, 0.2 parts of auxiliary antioxidant, and 0.2 parts of acid absorber.

4. The method for preparing scratch-resistant and flame-retardant PC / ABS alloy material as described in claim 1, characterized in that, The melt flow rate of ABS resin at 220℃ and 10kg was 20-50 g / min; the melt flow rate of PC resin at 220℃ and 10kg was 10-50 g / min.

5. The method for preparing scratch-resistant and flame-retardant PC / ABS alloy material as described in claim 1, characterized in that, The bromine-based flame retardant is one or both of bromotriazine and decabromodiphenyl ethane; the flame retardant synergist is antimony trioxide.

6. The method for preparing scratch-resistant and flame-retardant PC / ABS alloy material as described in claim 1, characterized in that, The primary antioxidant is one or more of antioxidants 1010 and 1076; the secondary antioxidant is one or more of antioxidants 626 and 168.

7. The method for preparing scratch-resistant and flame-retardant PC / ABS alloy material as described in claim 1, characterized in that, The acid absorber is one or more of zinc stearate and calcium stearate; the compatibilizer is one or more of SMA, MBS, and PE-g-MAH; and the scratch-resistant additive is one or more of fumed silica and nano-hydroxy needle apatite.

8. The method for preparing scratch-resistant and flame-retardant PC / ABS alloy material as described in claim 1, characterized in that, In step S2, the temperatures of each zone of the twin-screw extruder are as follows: 170℃ for the first zone, 190℃ for the second zone, 200℃ for the third zone, 210℃ for the fourth zone, 210℃ for the fifth zone, 210℃ for the sixth zone, 210℃ for the seventh zone, 210℃ for the eighth zone, 200℃ for the ninth zone, 190℃ for the tenth zone, and 170℃ for the die head.

9. The method for preparing scratch-resistant and flame-retardant PC / ABS alloy material as described in claim 1, characterized in that, In step S2, the oven temperature is 75℃, and the drying process is carried out with forced air for 6 hours.

10. A scratch-resistant and flame-retardant PC / ABS alloy material, characterized in that, The scratch-resistant and flame-retardant PC / ABS alloy material is prepared by the method described in any one of claims 1 to 9.