Household low-cost high-stability weather-resistant flame-retardant ABS material and preparation method thereof

Abstract

The invention discloses a household low-cost high-stability weather-resistant flame-retardant ABS (acrylonitrile-butadiene-styrene) material and a preparation method thereof, and relates to the technical field of high polymer materials. The ABS material is prepared from the following raw materials: 70-85 parts of ABS resin, 10-30 parts of a composite flame retardant, 1-5 parts of CPE resin, 1-5 parts of hydrotalcite, 1-5 parts of a stabilizer, 0.3-3 parts of black masterbatch, 0.1-1 part of an antioxidant and 1-5 parts of a lubricant. The ABS material prepared by the modification method has the advantages of high weather resistance, excellent flame retardant property, low cost, chemical corrosion resistance, good mechanical strength and easiness in forming, processing and coloring, and is mainly applied to the field of appearance materials for electrical contact in household appliances.

Description

Technical Field

[0001] The present invention belongs to the technical field of modified materials, and in particular relates to a household low-cost, highly stable, weather-resistant and flame-retardant ABS material and a preparation method thereof. Background Art

[0002] ABS is a copolymer of acrylonitrile-butadiene-styrene. A gives it chemical resistance and a certain surface hardness, B imparts high elasticity and toughness, and S imparts thermoplastic processing and molding properties, improving electrical properties. As an important thermoplastic engineering plastic, it is widely used in residential buildings, home appliances, electronic appliances, and the automotive industry.

[0003] As awareness of health, appearance, safety, and environmental protection continues to rise, the materials used in home appliances are also evolving. With increasing emphasis on environmental protection and safety, home appliance materials are shifting from non-environmentally friendly materials to environmentally friendly materials, and from non-flame-retardant materials to flame-retardant materials. However, ABS has an oxygen index of only 18%, making it a highly flammable resin. It continues to burn even after removal from the flame, releasing large amounts of smoke and toxic gases. This drawback limits its application. Flame-retardant ABS generally has poor gloss, is prone to degradation and yellowing, and has poor toughness due to its high filler content. Given the high aesthetic requirements of home appliance materials, improving ABS's flame retardancy and low-cost, high-stability weather resistance has become a pressing issue for the industry. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a low-cost, highly stable, weather-resistant and flame-retardant ABS material for household use and a preparation method thereof.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A low-cost, highly stable, weather-resistant, and flame-retardant ABS material for household use, comprising the following components in parts by weight:

[0007]

[0008] Preferably, the material further comprises the following components in parts by mass:

[0009] Black masterbatch 0.3-3 parts

[0010] 0.1-1 part antioxidant

[0011] 1-5 parts of lubricant.

[0012] Preferably, the ABS resin material is a mixture of bulk ABS and emulsion ABS, or both.

[0013] Preferably, the composite flame retardant is a compound of decabromodiphenyl ether, antimony trioxide and polytetrafluoroethylene in a mass ratio of 5:2:1.

[0014] Preferably, the antioxidant is at least one of hindered phenol antioxidant 1076 and phosphite antioxidant 168.

[0015] Preferably, the lubricant is at least one of stearic acid or silicone.

[0016] Preferably, the stabilizer is a combination of one or two of hindered amines, hindered benzoates, benzotriazoles, o-hydroxybenzophenones, and benzylmalonates.

[0017] Preferably, the hydrotalcite is a compound assembled by the interaction of layered double metal hydroxides, positively charged main layers and interlayer anions through non-covalent bonds.

[0018] 2. A method for preparing low-cost, high-stability, weather-resistant and flame-retardant ABS material for household use, characterized by comprising the following steps:

[0019] Step 1: Add ABS resin, composite flame retardant and CPE resin into a low-pressure mixer and mix to obtain a first mixture;

[0020] Step 2: Add hydrotalcite, black masterbatch, antioxidant, lubricant and stabilizer into a high-speed mixer and mix to obtain the second mixture;

[0021] Step 3: adding the first mixed material and the second mixed material together in a high-speed mixer and mixing them to obtain a third mixed material;

[0022] Step 4: Add the third mixed material into a parallel twin-screw extruder, melt, mix, extrude and granulate to obtain ABS material.

[0023] Preferably, the barrel temperature of the parallel twin-screw extruder in step 4 is 180-210° C., the screw speed is 400-500 r / min, the melt pressure is controlled at 1.5-1.8 MPa, and the vacuum degree is -0.04-0.08 MPa.

[0024] Beneficial effects of the present invention:

[0025] The present invention selects suitable ABS raw materials, starts from the molecular structure, preferably high-fluidity raw materials, adopts a composite flame retardant to compound CPE resin, utilizes the hydrotalcite layered structure to neutralize the hydrogen chloride generated by the reaction, and combines the screw combination and extrusion process for optimized configuration. The obtained material has excellent flame retardant properties, resistance to degradation and yellowing, and good gloss. DETAILED DESCRIPTION

[0026] In the following examples, the ABS resin is MG94 from Tianjin Dagu; the composite flame retardant is a mixture of decabromodiphenyl ether (DBDPO), antimony trioxide, and polytetrafluoroethylene in a mass ratio of 5:2:1; the black masterbatch is a masterbatch from Maoyi Industrial; the antioxidant is a mixture of hindered phenol antioxidant 1076 and phosphite antioxidant 168 in a ratio of 1:1; the lubricant is ethylene bisstearamide; the stabilizer is a mixture of hindered benzoates and benzotriazoles in a ratio of 2:1; the hydrotalcite is a compound composed of layered double hydroxides, positively charged main layers, and interlayer anions assembled through non-covalent interactions; and the CPE (chlorinated polyethylene) is a resin having a chlorine content of 30% or more, which can significantly enhance the flame retardant effect and is selected from Weifang Yaxing CPE2135.

[0027] Embodiment 1:

[0028] Weigh the following raw materials according to the proportion

[0029]

[0030] The preparation method is as follows:

[0031] (1) Add ABS resin, composite flame retardant, and CPE resin into a low-pressure mixer and mix at a speed of 250 r / min for 3 minutes;

[0032] (2) Add hydrotalcite, black masterbatch, antioxidant, lubricant, and stabilizer into a high-speed mixer and mix at a speed of 500 r / min for 6 minutes;

[0033] (3) adding the mixture of step (2) to the mixture of step (1) and mixing in a high-speed mixer at a speed of 400 r / min for 6 minutes;

[0034] (4) The mixed material in step (3) is added to a parallel twin-screw extruder, melted and mixed, the barrel temperature is 200°C, the screw speed is 400r / min, the melt pressure is controlled at 1.8MPa, the vacuum degree is -0.04-0.08MPa, and ABS material is obtained by extrusion granulation.

[0035] The mechanical properties of the ABS material obtained in Example 1 are shown in Table 1.

[0036] Example 2:

[0037] Weigh the following raw materials according to the proportion

[0038]

[0039] The preparation method is as follows:

[0040] (1) Add ABS resin, composite flame retardant, and CPE resin into a low-pressure mixer and mix at a speed of 250 r / min for 3 minutes;

[0041] (2) Add hydrotalcite, black masterbatch, antioxidant, lubricant, and stabilizer into a high-speed mixer and mix at a speed of 500 r / min for 5 minutes;

[0042] (3) adding the mixture of step (2) to the mixture of step (1) and mixing in a high-speed mixer at a speed of 400 r / min for 5 minutes;

[0043] (4) The mixed material in step (3) is added to a parallel twin-screw extruder, melted, melt-mixed, and extruded and granulated to obtain ABS material at a barrel temperature of 210°C, a screw speed of 450 r / min, a melt pressure of 1.7 MPa, and a vacuum degree of -0.04-0.08 MPa.

[0044] The mechanical properties of the ABS material obtained in Example 2 are shown in Table 1.

[0045] Example 3:

[0046] Weigh the following raw materials according to the proportion

[0047]

[0048] The preparation method is as follows:

[0049] (1) Add ABS resin, composite flame retardant, and CPE resin into a low-pressure mixer and mix at a speed of 250 r / min for 2 minutes;

[0050] (2) Add hydrotalcite, black masterbatch, antioxidant, lubricant, and stabilizer into a high-speed mixer and mix at a speed of 500 r / min for 5 minutes;

[0051] (3) adding the mixture of step (2) to the mixture of step (1) and mixing in a high-speed mixer at a speed of 400 r / min for 6 minutes;

[0052] (4) The mixed material in step (3) is added to a parallel twin-screw extruder, melted and mixed, and the barrel temperature is 210° C., the screw speed is 500 r / min, the melt pressure is controlled at 1.7 MPa, and the vacuum degree is -0.04-0.08 MPa, and ABS material is obtained by extrusion and granulation.

[0053] The mechanical properties of the ABS material obtained in Example 3 are shown in Table 1.

[0054] Embodiment 4:

[0055] Weigh the following raw materials according to the proportion

[0056]

[0057] The preparation method is as follows:

[0058] (1) Add ABS resin, composite flame retardant and CPE resin into a low-pressure mixer and mix at a speed of 250 r / min for 3 minutes;

[0059] (2) Add hydrotalcite, black masterbatch, antioxidant, lubricant and stabilizer into high speed mixer and mix at 500℃.

[0060] Mix at a speed of r / min for 6 minutes;

[0061] (3) Add the mixture of step (2) to the mixture of step (1) in a high-speed mixer.

[0062] Mix at 400 r / min for 6 minutes;

[0063] The mixed material in step (3) is added into a parallel twin-screw extruder, melted, and mixed.

[0064] The barrel temperature is 200℃, the screw speed is 400r / min, and the melt pressure is controlled at

[0065] 1.8MPa, vacuum degree -0.04-0.08MPa, ABS material is obtained by extrusion granulation.

[0066] The mechanical properties of the ABS material obtained in Example 4 are shown in Table 1.

[0067] Comparative Example 1:

[0068] Weigh the following raw materials according to the proportion

[0069]

[0070] The preparation method is as follows:

[0071] (1) Add ABS resin, composite flame retardant and CPE resin into a low-pressure mixer and mix at a speed of 250 r / min for 3 minutes;

[0072] (2) Add hydrotalcite, black masterbatch, antioxidant, lubricant, and stabilizer into a high-speed mixer and mix at a speed of 500 r / min for 6 minutes;

[0073] (3) adding the mixture of step (2) to the mixture of step (1) and mixing in a high-speed mixer at a speed of 400 r / min for 6 minutes;

[0074] (4) The mixed material in step (3) is added to a parallel twin-screw extruder, melted and mixed, the barrel temperature is 200°C, the screw speed is 400r / min, the melt pressure is controlled at 1.8MPa, the vacuum degree is -0.04-0.08MPa, and ABS material is obtained by extrusion granulation.

[0075] The mechanical properties of the ABS material obtained in Comparative Example 1 are shown in Table 1.

[0076] Comparative Example 2:

[0077] Weigh the following raw materials according to the proportion

[0078]

[0079] The preparation method is as follows:

[0080] (1) Add ABS resin, composite flame retardant and CPE resin into a low-pressure mixer and mix at a speed of 250 r / min for 3 minutes;

[0081] (2) Add hydrotalcite, black masterbatch, antioxidant, lubricant, and stabilizer into a high-speed mixer and mix at a speed of 450 r / min for 5 minutes;

[0082] (3) adding the mixture of step (2) to the mixture of step (1) and mixing in a high-speed mixer at a speed of 400 r / min for 6 minutes;

[0083] (4) The mixed material in step (3) is added to a parallel twin-screw extruder, melted and mixed, the barrel temperature is 200°C, the screw speed is 400r / min, the melt pressure is controlled at 1.8MPa, the vacuum degree is -0.04-0.08MPa, and ABS material is obtained by extrusion granulation.

[0084] The mechanical properties of the ABS material obtained in Comparative Example 2 are shown in Table 1.

[0085] The physical properties of the ABS materials obtained in Examples 1-4 and Comparative Examples 1 and 2 are shown in Table 1 below.

[0086] Table 1

[0087]

[0088] According to the test results in Table 1, the ABS material of the present invention has very excellent flame retardancy, excellent weather resistance, and high gloss. Compared with the prior art, it has the following advantages.

[0089] 1. The present invention adopts highly fat-soluble ABS MG94 raw material, adopts a step-by-step mixing method, adjusts process parameters, and starts from the molecular structure to ensure the processing and molding of the material.

[0090] 2. The present invention adds CPE resin as a synergist and toughening agent of the composite flame retardant, which improves the flame retardant properties of the material, so that the flame retardancy of 1.6mm can also reach VO level (V0 level is the highest level of flame retardant performance of plastic materials in the international standard UL94, representing that the material has extremely strong self-extinguishing and flame spread resistance).

[0091] 3. After adding hydrotalcite to the present invention, the glossiness of the composite material at a 60-degree angle is significantly improved. The layered metal oxide structure inhibits the decomposition of the material, and the glossiness can reach above 100. The appearance is black and shiny. This type of material is suitable for use in home exterior materials and can replace spray-painted parts.

[0092] 4. After adding the stabilizer, the color difference values ​​of the present invention after 96 hours of xenon lamp irradiation were all less than 2, which was much smaller than that of the ABS in the comparative example without the stabilizer. This shows that the stabilizer provides the material with very excellent weather resistance. The benzotriazoles and hindered benzoates in the stabilizer work synergistically, resulting in the material having excellent weather resistance.

[0093] In summary, the ABS material prepared by the modified method has high weather resistance, excellent flame retardancy, relatively low cost, chemical corrosion resistance, good mechanical strength, easy molding and coloring, good gloss, not easy to degrade and yellow, and good toughness. It is suitable for household appliance materials, and is mainly used in the field of appearance materials that come into contact with electricity in household appliances.

[0094] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; those familiar with the art can easily modify the embodiments or make equivalent replacements for the characteristic parts therein; and these modifications or replacements cannot deviate from the essence of the present invention and the spirit and scope of the technical solutions of each embodiment.

Claims

1. A low-cost, high-stability, weather-resistant and flame-retardant ABS material for household use, characterized in that: The material comprises the following components in parts by weight:

2. A low-cost, high-stability, weather-resistant, flame-retardant ABS material for household use according to claim 1, characterized in that: The material also contains the following components in parts by weight: Black masterbatch 0.3-3 parts 0.1-1 part antioxidant 1-5 parts of lubricant.

3. A low-cost, highly stable, weather-resistant, flame-retardant ABS material for household use according to claim 1, wherein the ABS resin material is a mixture of bulk ABS and emulsion ABS, or both.

4. A low-cost, high-stability, weather-resistant, flame-retardant ABS material for household use according to claim 1, characterized in that: The composite flame retardant is a compound of decabromodiphenyl ether, antimony trioxide and polytetrafluoroethylene in a mass ratio of 5:2:

1.

5. A low-cost, high-stability, weather-resistant, flame-retardant ABS material for household use according to claim 1, characterized in that: The antioxidant is at least one of hindered phenol antioxidant 1076 and phosphite antioxidant 168.

6. A low-cost, high-stability, weather-resistant, flame-retardant ABS material for household use according to claim 1, characterized in that: The lubricant is at least one of stearic acid and silicone.

7. A low-cost, high-stability, weather-resistant, flame-retardant ABS material for household use according to claim 1, characterized in that: The stabilizer is a combination of one or two of hindered amines, hindered benzoates, benzotriazoles, o-hydroxybenzophenones, and benzylmalonates.

8. A low-cost, high-stability, weather-resistant, flame-retardant ABS material for household use according to claim 1, characterized in that: The hydrotalcite is a compound assembled by the interaction of layered double metal hydroxide, main layers with positive charges and interlayer anions through non-covalent bonds.

9. The method for preparing low-cost, high-stability, weather-resistant and flame-retardant ABS material for household use according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Add ABS resin, composite flame retardant and CPE resin into a low-pressure mixer and mix to obtain a first mixture; Step 2: Add hydrotalcite, black masterbatch, antioxidant, lubricant and stabilizer into a high-speed mixer and mix to obtain the second mixture; Step 3: adding the first mixed material and the second mixed material together in a high-speed mixer and mixing them to obtain a third mixed material; Step 4: Add the third mixed material into a parallel twin-screw extruder, melt, mix, extrude and granulate to obtain ABS material.

10. The preparation method according to claim 9, characterized in that: The barrel temperature of the parallel twin-screw extruder in step 4 is 180-210° C., the screw speed is 400-500 r / min, the melt pressure is controlled at 1.5-1.8 MPa, and the vacuum degree is -0.04-0.08 MPa.

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