A kind of corrosion-resistant plastic and preparation method thereof

Abstract

The present invention discloses a corrosion-resistant plastic and a preparation method thereof, comprising a polycarbonate matrix resin, sodium octadecanoate, zinc oxide, an antioxidant and an ultraviolet shielding agent; wherein, in terms of the mass fraction of each raw material, the polycarbonate matrix resin is 60 to 80 parts, the sodium octadecanoate is 3 to 6 parts, the zinc oxide is 1 to 5 parts, the antioxidant is 0.7 to 1 part, and the ultraviolet shielding agent is 2 to 4 parts. The present invention provides a corrosion-resistant plastic and a preparation method thereof, which uses a polycarbonate matrix resin as a raw material, and achieves good corrosion resistance by adding sodium octadecanoate, ceramic powder, zinc oxide, and aluminum smelting waste slag for synergistic effect. At the same time, compared with the existing modification technology, it is more convenient and suitable for industrial application.

Description

Technical Field

[0001] The invention belongs to the field of engineering plastic preparation, and in particular relates to corrosion-resistant plastic and a preparation method thereof. Background Art

[0002] Corrosion-resistant plastic is a resin polymer material that can resist the erosion of acid, alkali and salt chemical media without being destroyed or deteriorated. It forms one of the three major synthetic materials today along with synthetic rubber and synthetic fibers.

[0003] At present, plastics are made of natural or synthetic resins as the main component, with additives added, molded into a certain shape under specific conditions, and keep the shape unchanged at room temperature. Although the existing plastics made by the current process will not corrode in a short period of time after contact with corrosive substances, the performance of the plastics will deteriorate after long-term contact, which seriously affects its performance.

[0004] Patent CN112250972A discloses a corrosion-resistant plastic and a preparation method thereof, and discloses the formula of the corrosion-resistant plastic: 80-100 parts of polyvinyl chloride, 5-8 parts of corrosion-resistant filler, 1-3 parts of dispersant, 3-5 parts of plasticizer, and 3-5 parts of heat stabilizer. This solution achieves good corrosion resistance by preparing specific corrosion-resistant fillers, but its preparation process is complicated and the modified corrosion resistance effect is limited. Patent CN 104119591A discloses a corrosion-resistant plastic particle and a preparation method thereof. This solution specifically discloses the raw materials: polyethylene, deionized water, glycerol, mineral oil, ethylene glycol and liquid paraffin. The plastic is made corrosion-resistant by reducing the stress concentration in the plastic, but this method has a poor effect and is often difficult to achieve the expected effect in actual application.

[0005] Therefore, there is an urgent need in the art for a plastic with simple process and good corrosion resistance and a preparation process thereof. Summary of the invention

[0006] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0007] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0008] Therefore, the object of the present invention is to overcome the deficiencies in the prior art and provide a corrosion-resistant plastic.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: a corrosion-resistant plastic, comprising a polycarbonate matrix resin, sodium octadecanoate, zinc oxide, an antioxidant and an ultraviolet shielding agent;

[0010] Wherein, based on the mass proportion of each raw material, the polycarbonate matrix resin is 60-80 parts, the sodium octadecanoate is 3-6 parts, the zinc oxide is 1-5 parts, the antioxidant is 0.7-1 parts, and the ultraviolet shielding agent is 2-4 parts.

[0011] As a preferred embodiment of the corrosion-resistant plastic of the present invention, the polycarbonate matrix resin is 70-80 parts, the sodium octadecanoate is 3-5 parts, the zinc oxide is 3-5 parts, the antioxidant is 0.7-0.8 parts, and the ultraviolet shielding agent is 2-3 parts.

[0012] As a preferred embodiment of the corrosion-resistant plastic of the present invention, the polycarbonate matrix resin is 70 parts, the sodium octadecanoate is 4 parts, the zinc oxide is 3 parts, the antioxidant is 0.8 parts, and the ultraviolet shielding agent is 3 parts.

[0013] As a preferred embodiment of the corrosion-resistant plastic of the present invention, the antioxidant is one or more of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and n-octadecylβ-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate.

[0014] As a preferred embodiment of the corrosion-resistant plastic of the present invention, the antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate].

[0015] As a preferred embodiment of the corrosion-resistant plastic of the present invention, the ultraviolet shielding agent is one or more of titanium dioxide, talcum powder and clay powder.

[0016] As a preferred embodiment of the corrosion-resistant plastic of the present invention, the ultraviolet shielding agent is titanium dioxide.

[0017] Another object of the present invention is to overcome the deficiencies in the prior art and provide a method for preparing corrosion-resistant plastics, comprising:

[0018] The polycarbonate matrix resin, sodium octadecanoate, zinc oxide, an antioxidant and an ultraviolet shielding agent are mixed, added into a reaction kettle and stirred, stirred evenly, and extruded and granulated by a twin-screw extruder to obtain a corrosion-resistant polycarbonate modified plastic;

[0019] The stirring is uniform, wherein the stirring speed is 170r / min and the time is 30min.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a corrosion-resistant plastic and a preparation method thereof. The polycarbonate matrix resin is used as a raw material, and sodium octadecanoate, ceramic powder, zinc oxide, and aluminum smelting waste slag are added for synergistic effect to achieve good corrosion resistance. At the same time, compared with the existing modification technology, the plastic is more convenient and suitable for industrial application. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the embodiments of the specification.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] The zinc oxide particle size in the present invention is 0.1 μm, which is a common commercial product; other raw materials are all common commercial products.

[0026] Example 1

[0027] The present invention provides a corrosion-resistant plastic and a preparation method thereof, the main steps of which are:

[0028] (1) Prepare materials: weigh 70 parts of polycarbonate matrix resin, 4 parts of sodium octadecanoate, 3 parts of zinc oxide, 0.8 parts of antioxidant pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 3 parts of ultraviolet shielding agent titanium dioxide, by mass.

[0029] (2) Preparation process:

[0030] The polycarbonate matrix resin, sodium octadecanoate, zinc oxide, antioxidant and ultraviolet shielding agent are mixed, added into a reaction kettle and stirred at 170 r / min for 30 minutes. The mixture is stirred evenly, and extruded and granulated by a twin-screw extruder to obtain a corrosion-resistant polycarbonate modified plastic.

[0031] (3) Performance test:

[0032] The plastic is made into a 50mm×25mm×2mm test specimen. For alkali resistance, soak it in 20% sodium hydroxide at 25°C for 60 days and calculate the loss A. For salt resistance, soak it in 5% sodium chloride at 25°C for 30 days and calculate the loss B. The results are shown in Table 1.

[0033] Example 2

[0034] The present invention provides a corrosion-resistant plastic and a preparation method thereof, the main steps of which are:

[0035] (1) Prepare materials: weigh 60 parts of polycarbonate matrix resin, 3 parts of sodium octadecanoate, 1 part of zinc oxide, 0.7 parts of antioxidant pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 2 parts of ultraviolet shielding agent titanium dioxide, by mass.

[0036] (2) Preparation process:

[0037] The polycarbonate matrix resin, sodium octadecanoate, zinc oxide, antioxidant and ultraviolet shielding agent are mixed, added into a reaction kettle and stirred at 160 r / min for 20 minutes, stirred evenly, and extruded and granulated by a twin-screw extruder to obtain a corrosion-resistant polycarbonate modified plastic.

[0038] (3) Performance test:

[0039] The plastic is made into a 50mm×25mm×2mm test specimen. For alkali resistance, soak it in 20% sodium hydroxide at 25°C for 60 days and calculate the loss A. For salt resistance, soak it in 5% sodium chloride at 25°C for 30 days and calculate the loss B. The results are shown in Table 1.

[0040] Example 3

[0041] The present invention provides a corrosion-resistant plastic and a preparation method thereof, the main steps of which are:

[0042] (1) Prepare materials: weigh 80 parts of polycarbonate matrix resin, 6 parts of sodium octadecanoate, 5 parts of zinc oxide, 1 part of antioxidant pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 4 parts of ultraviolet shielding agent titanium dioxide, by mass.

[0043] (2) Preparation process:

[0044] The polycarbonate matrix resin, sodium octadecanoate, zinc oxide, antioxidant and ultraviolet shielding agent are mixed, added into a reaction kettle and stirred at 175 r / min for 30 minutes. The mixture is stirred evenly and extruded and granulated by a twin-screw extruder to obtain a corrosion-resistant polycarbonate modified plastic.

[0045] (3) Performance test:

[0046] The plastic is made into a 50mm×25mm×2mm test specimen. For alkali resistance, soak it in 20% sodium hydroxide at 25°C for 60 days and calculate the loss A. For salt resistance, soak it in 5% sodium chloride at 25°C for 30 days and calculate the loss B. The results are shown in Table 1.

[0047] Table 1

[0048] Example 1 Example 2 Example 3 Loss Amount 0.12 0.14 0.16 Loss Amount B 0.21 0.26 0.31

[0049] As can be seen from Table 1, using polycarbonate matrix resin as raw material, by adding sodium octadecanoate, ceramic powder, zinc oxide, and aluminum smelting waste slag for synergistic effect, its corrosion resistance is excellent, and at the same time, it is more convenient than the existing modification technology.

[0050] Comparative Example 1

[0051] The present invention provides a corrosion-resistant plastic and a preparation method thereof, the main steps of which are:

[0052] (1) Prepare materials: weigh 70 parts by mass of polycarbonate matrix resin, 7 parts by mass of sodium octadecanoate, 0.8 parts by mass of antioxidant pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 3 parts by mass of ultraviolet shielding agent titanium dioxide.

[0053] (2) Preparation process:

[0054] The polycarbonate matrix resin, sodium octadecanoate, antioxidant and ultraviolet shielding agent are mixed, added into a reaction kettle and stirred at 170 r / min for 30 minutes. The mixture is uniformly stirred, and extruded and granulated by a twin-screw extruder to obtain a corrosion-resistant polycarbonate modified plastic.

[0055] (3) Performance test:

[0056] The plastic is made into a 50mm×25mm×2mm test specimen. For alkali resistance, soak it in 20% sodium hydroxide at 25°C for 60 days and calculate the loss A. For salt resistance, soak it in 5% sodium chloride at 25°C for 30 days and calculate the loss B. The results are shown in Table 2.

[0057] Comparative Example 2

[0058] The present invention provides a corrosion-resistant plastic and a preparation method thereof, the main steps of which are:

[0059] (1) Prepare materials: Weigh 70 parts by mass of polycarbonate matrix resin, 7 parts by mass of zinc oxide, 0.8 parts by mass of antioxidant pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and 3 parts by mass of ultraviolet shielding agent titanium dioxide.

[0060] (2) Preparation process:

[0061] The polycarbonate matrix resin, zinc oxide, antioxidant and ultraviolet shielding agent are mixed, added into a reaction kettle and stirred at 170 r / min for 30 minutes. The mixture is uniformly stirred, and extruded and granulated by a twin-screw extruder to obtain a corrosion-resistant polycarbonate modified plastic.

[0062] (3) Performance test:

[0063] The plastic is made into a 50mm×25mm×2mm test specimen. For alkali resistance, soak it in 20% sodium hydroxide at 25°C for 60 days and calculate the loss A. For salt resistance, soak it in 5% sodium chloride at 25°C for 30 days and calculate the loss B. The results are shown in Table 2.

[0064] Comparative Example 3

[0065] The present invention provides a corrosion-resistant plastic and a preparation method thereof, the main steps of which are:

[0066] (1) Prepare materials: Weigh 70 parts by mass of polycarbonate matrix resin, 0.8 parts of antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] pentaerythritol ester, and 3 parts of ultraviolet shielding agent titanium dioxide.

[0067] (2) Preparation process:

[0068] The polycarbonate matrix resin, antioxidant and ultraviolet shielding agent are mixed, added into a reaction kettle and stirred at 170 r / min for 30 minutes. The mixture is stirred evenly and extruded and granulated by a twin-screw extruder to obtain a corrosion-resistant polycarbonate modified plastic.

[0069] (3) Performance test:

[0070] The plastic is made into a 50mm×25mm×2mm test specimen. For alkali resistance, soak it in 20% sodium hydroxide at 25°C for 60 days and calculate the loss A. For salt resistance, soak it in 5% sodium chloride at 25°C for 30 days and calculate the loss B. The results are shown in Table 2.

[0071] Table 2

[0072] Comparative Example 1 Comparative Example 2 Comparative Example 3 Loss Amount 0.22 0.26 0.48 Loss Amount B 0.38 0.44 0.62

[0073] As can be seen from Table 2, when zinc oxide is not added in Comparative Example 1, the corrosion resistance is reduced, which may be due to the joint action of zinc oxide and sodium octadecanoate to form a coordination compound with its carboxylate ion, thereby enhancing the bonding performance between the raw materials, and then enhancing the synergistic effect between the raw materials, thereby improving the anti-corrosion effect; as can be seen from Comparative Example 2, when sodium octadecanoate is not added, its anti-corrosion effect is not good, there may be no emulsification effect of sodium octadecanoate, the bonding performance is reduced, the synergistic effect between the materials cannot be achieved, and the anti-corrosion effect is reduced; as can be seen from Comparative Example 3, when zinc oxide and sodium octadecanoate are not added, its anti-corrosion effect is greatly reduced.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the present invention.

Claims

1. A corrosion-resistant plastic, characterized in that: Including, polycarbonate base resin, sodium octadecanoate, zinc oxide, antioxidant and ultraviolet shielding agent; Wherein, based on the mass proportion of each raw material, the polycarbonate matrix resin is 60-80 parts, the sodium octadecanoate is 3-6 parts, the zinc oxide is 1-5 parts, the antioxidant is 0.7-1 parts, and the ultraviolet shielding agent is 2-4 parts.

2. The corrosion-resistant plastic according to claim 1, characterized in that: The polycarbonate matrix resin is 70-80 parts, the sodium octadecanoate is 3-5 parts, the zinc oxide is 3-5 parts, the antioxidant is 0.7-0.8 parts, and the ultraviolet shielding agent is 2-3 parts.

3. The corrosion-resistant plastic according to claim 1 or 2, characterized in that: The polycarbonate matrix resin is 70 parts, the sodium octadecanoate is 4 parts, the zinc oxide is 3 parts, the antioxidant is 0.8 parts, and the ultraviolet shielding agent is 3 parts.

4. The corrosion-resistant plastic according to claim 3, characterized in that: The antioxidant is one or more of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and n-octadecylβ-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate.

5. The corrosion-resistant plastic according to claim 3, characterized in that: The antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate].

6. The corrosion-resistant plastic according to claim 3, characterized in that: The ultraviolet shielding agent is one or more of titanium dioxide, talcum powder and clay powder.

7. The corrosion-resistant plastic according to claim 6, characterized in that: The ultraviolet shielding agent is titanium dioxide.

8. The method for preparing the corrosion-resistant plastic according to any one of claims 1 to 7, characterized in that: include, The polycarbonate matrix resin, sodium octadecanoate, zinc oxide, antioxidant and ultraviolet shielding agent are mixed, added into a reaction kettle and stirred, stirred evenly, and extruded and granulated by a twin-screw extruder to obtain corrosion-resistant polycarbonate modified plastic.

9. The preparation method according to claim 8, characterized in that: The stirring is uniform, wherein the stirring speed is 170r / min and the time is 30min.