Environment-friendly stabilizer with anti-corrosion function

Abstract

The invention provides an environment-friendly stabilizer with an anti-corrosion function. The environment-friendly stabilizer is prepared from the following raw materials in percentage by mass: 10-35% of a main stabilizer, 1-5% of an auxiliary stabilizer A, 1-5% of a color inhibitor, 1-5% of an antioxidant A, 5-10% of a light stabilizer and 20-50% of hydrotalcite. Compared with a traditional stabilizer, the environment-friendly stabilizer with the anti-corrosion function has the advantages that on the basis of preventing aerugo, the environment-friendly stabilizer with the anti-corrosion function has high transparency and excellent initial coloring performance, meanwhile, the stability of PVC is improved, degradation and discoloration of the PVC are prevented, and therefore the service life of PVC products is prolonged, and the environment-friendly stabilizer is non-toxic and environmentally friendly.

Description

Technical Field

[0001] The invention relates to the field of chemical stabilizers, and in particular to an environmentally friendly stabilizer with an anti-corrosion function. Background Art

[0002] Polyvinyl chloride (PVC) is a widely used thermoplastic, which is used to manufacture various products such as pipes, window frames, cable insulation, etc. due to its excellent chemical corrosion resistance, wear resistance and electrical insulation. However, during the processing and use of PVC, especially in applications containing copper or copper alloy components, the presence of copper ions can cause the PVC material to degrade, resulting in the so-called "patina", which can significantly reduce the performance and service life of PVC products.

[0003] Traditional PVC stabilizers mainly include lead salts, calcium zinc, organic tin and rare earth, which play an important role in improving the thermal stability and light stability of PVC. However, these traditional stabilizers have no special effect on the degradation of PVC caused by copper ions, and some stabilizers such as lead salts and organic tin contain heavy metals, which pose environmental and health risks. In recent years, researchers have begun to explore non-toxic and environmentally friendly PVC stabilizers to replace traditional toxic stabilizers. Among them, hydrotalcite stabilizers have attracted attention due to their layered structure and ion exchange capacity. They can absorb copper ions through ion exchange, thereby inhibiting the degradation of PVC. In addition, organic nitrogen stabilizers such as dihydropyridine derivatives also show a stabilizing effect on PVC, but there are few studies on their anti-copper rust properties.

[0004] Therefore, it is necessary to develop an environmentally friendly stabilizer with anti-corrosion function, which can solve the problem of anti-copper rust and also has high transparency, excellent initial coloring performance, and is non-toxic and environmentally friendly. Summary of the invention

[0005] The purpose of the present invention is to provide an environmentally friendly stabilizer with anti-corrosion function in view of the shortcomings of the prior art, which can solve the problem of copper rust prevention and also has high transparency, excellent initial coloring performance, and is non-toxic and environmentally friendly.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An environmentally friendly stabilizer with anti-corrosion function, comprising the following raw materials in percentage by mass:

[0008]

[0009] The main stabilizer is zinc benzoate and its derivatives;

[0010] The main stabilizer B is a stearate compound;

[0011] The auxiliary stabilizer A is an amide compound;

[0012] The color inhibitor is a dihydropyridine derivative;

[0013] The antioxidant A is a benzofuranone derivative;

[0014] The light stabilizer is cyanamide.

[0015] Preferably, the environmentally friendly stabilizer comprises the following raw materials in percentage by mass:

[0016]

[0017] Preferably, the environmentally friendly stabilizer further comprises 1-5% by mass of a secondary stabilizer B, wherein the secondary stabilizer B is a stearate compound.

[0018] Preferably, the environmentally friendly stabilizer further comprises 3-10% by mass of an antioxidant B, wherein the antioxidant B is a benzene ring phosphate compound.

[0019] Preferably, the primary stabilizer is at least one of zinc benzoate and zinc p-tert-butylbenzoate.

[0020] Preferably, the auxiliary stabilizer B is at least one of magnesium stearate, calcium stearate and lanthanum stearate.

[0021] Preferably, the auxiliary stabilizer A is at least one of oleamide, erucamide, stearamide, lauric acid amide and linoleamide.

[0022] Preferably, the color inhibitor is at least one of dihydropyridine methyl ester, dihydropyridine ethyl ester and dihydropyridine dodecanol ester.

[0023] Preferably, the antioxidant A is 5,7-di-tert-butyl-3-(3,4-xylyl)benzofuran-2(3H)-one.

[0024] Preferably, the hydrotalcite is at least one of magnesium-aluminum hydrotalcite and magnesium-aluminum-zinc ternary hydrotalcite.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The main stabilizer added in the present invention can significantly improve the stability and transparency of PVC products. In addition, zinc benzoate and its derivatives are non-toxic and environmentally friendly, suitable for PVC products for food packaging, and can inhibit the initial coloring of PVC to maintain its good appearance and quality. This stabilizer improves the stability of PVC by reacting with the allyl chloride on the PVC molecule, preventing its degradation and discoloration, thereby extending the service life of PVC products.

[0027] (2) The auxiliary stabilizer A added in the present invention, its amide compound can react with the metal surface to form a protective film. This film effectively isolates corrosive media such as oxygen and moisture from direct contact with the metal surface, thereby significantly reducing the risk of corrosion. In addition, this type of compound has a strong adsorption property and can form a uniform molecular layer on the metal surface, providing an additional protective barrier for the metal. The amino functional group in the amide compound has the characteristic of neutralizing the acidic environment. When the metal surface encounters acidic substances, the amino functional group can neutralize the acidic substances and reduce its corrosive effect on the metal. High molecular weight block polyamide compounds not only have excellent dispersibility and antistatic functions, but also can form a stable membrane interface and network structure. This structure has good dispersibility and can form a stable membrane interface and network structure on the metal surface, reducing the possibility of acidic substances corroding the metal.

[0028] (3) The dihydropyridine derivative of the color inhibitor added in the present invention can absorb HCl generated by the degradation of PVC, reduce the color change caused by HCl, thereby improving the initial color of the PVC product, improving the color brightness of the product, preventing the degradation of PVC under light conditions, and maintaining the color and performance of the PVC product. The dihydropyridine derivative is non-toxic and environmentally friendly, which can reduce the impact on the environment and meet the sustainable development requirements of the modern plastics industry.

[0029] (4) The antioxidant A added in the present invention, the benzofuranone derivative thereof is an effective corrosion inhibitor for protecting copper and copper alloys. It forms a protective film on the copper surface through adsorption theory and film formation theory, thereby inhibiting the corrosion of copper. This protective film can significantly reduce the degree of dissolution or ionization of the metal, playing a role in protecting the metal. Traditional anti-copper rust functional additives, such as benzotriazole, are toxic substances, have a strong irritating effect on the eyes, and have a moderate degree of irritation to the skin; while the benzofuranone derivative is safe and non-toxic.

[0030] (5) The light stabilizer added in the present invention, CYC, can effectively inhibit the decomposition reaction of the polymer under sunlight or ultraviolet radiation, and extend the service life of the plastic product. In the PVC stabilizer, the addition of CYC can enhance the moisture-proof performance of the stabilizer to ensure that the PVC products maintain stable quality and performance during storage and use, and work together with other ingredients such as zinc stearate, polyols, etc. to provide moisture-proof and stable effects. DETAILED DESCRIPTION

[0031] To make the technical solutions and advantages of the present invention more clear, the present invention and its beneficial effects will be further described in detail below in conjunction with specific implementation methods, but the implementation methods of the present invention are not limited thereto.

[0032] According to the first aspect of the present application, the present application aims to provide an environmentally friendly stabilizer with an anti-corrosion function, comprising the following raw material compositions in mass percentage:

[0033]

[0034]

[0035] The main stabilizer is zinc benzoate and its derivatives;

[0036] The auxiliary stabilizer A is an amide compound;

[0037] The color suppressant is a dihydropyridine derivative;

[0038] Antioxidant A is a benzofuranone derivative;

[0039] The light stabilizer is Cyclic.

[0040] Among them, the content of the main stabilizer can be specifically 10%, 15%, 20%, 25%, 30% or 35%; the content of the auxiliary stabilizer can be specifically 1%, 2%, 3%, 4% or 5%; the content of the color inhibitor can be specifically 1%, 2%, 3%, 4% or 5%; the content of the antioxidant A can be specifically 1%, 2%, 3%, 4% or 5%; the content of the light stabilizer can be specifically 5%, 6%, 7%, 8%, 9% or 10%; the content of the hydrotalcite can be specifically 20%, 25%, 30%, 35%, 40%, 45% or 50%;

[0041] Among them, the main stabilizer can significantly improve the stability and transparency of PVC products. In addition, zinc benzoate and its derivatives are non-toxic and environmentally friendly, suitable for PVC products for food packaging, and can inhibit the initial coloring of PVC to maintain its good appearance and quality. This stabilizer improves the stability of PVC by reacting with the allyl chloride on the PVC molecule, preventing it from degradation and discoloration, thereby extending the service life of PVC products.

[0042] Auxiliary stabilizer A, its amide compounds can react with the metal surface to form a protective film. This film effectively isolates corrosive media such as oxygen and moisture from direct contact with the metal surface, thereby significantly reducing the risk of corrosion. In addition, this type of compound has a strong adsorption property and can form a uniform molecular layer on the metal surface, providing an additional protective barrier for the metal. The amino functional group in the amide compound has the characteristic of neutralizing the acidic environment. When the metal surface encounters acidic substances, the amino functional group can neutralize the acidic substances and reduce its corrosive effect on the metal. High molecular weight block polyamide compounds not only have excellent dispersibility and antistatic functions, but also can form a stable membrane interface and network structure. This structure has good dispersibility and can form a stable membrane interface and network structure on the metal surface, reducing the possibility of acidic substances corroding the metal.

[0043] Color inhibitors, dihydropyridine derivatives of which can absorb HCl produced by PVC degradation, reduce color changes caused by HCl, thereby improving the initial color of PVC products, improving the color brightness of products, preventing PVC from degrading under light conditions, and maintaining the color and performance of PVC products. Dihydropyridine derivatives are non-toxic and environmentally friendly, which can reduce the impact on the environment and meet the sustainable development requirements of the modern plastics industry.

[0044] Antioxidant A, its benzofuranone derivatives are effective corrosion inhibitors for protecting copper and copper alloys. It forms a protective film on the copper surface through adsorption theory and film formation theory, thereby inhibiting copper corrosion. This protective film can significantly reduce the degree of dissolution or ionization of the metal, playing a role in protecting the metal. Traditional anti-copper rust functional additives, such as benzotriazole, are toxic substances, have a strong irritating effect on the eyes, and have a moderate degree of irritation to the skin; while benzofuranone derivatives are safe and non-toxic.

[0045] As a light stabilizer, Cyclic acid can effectively inhibit the decomposition reaction of polymers under sunlight or ultraviolet rays, thus extending the service life of plastic products. In PVC stabilizers, the addition of Cyclic acid can enhance the moisture-proof performance of the stabilizer to ensure that PVC products maintain stable quality and performance during storage and use. It works together with other ingredients such as zinc stearate and polyols to provide moisture-proof and stable effects.

[0046] As a unique layered columnar double metal hydroxide, hydrotalcite has special physical and chemical properties, such as alkalinity, charged properties, anion exchangeability, microporous structure, etc. In the PVC processing process, hydrotalcite has a large capture capacity for chloride ions, which can prevent the plastic from yellowing. It has good compatibility with antioxidants such as BHT, is non-corrosive and does not escape; and can significantly improve the weather resistance and heat resistance of plastics.

[0047] In some embodiments, the raw material composition includes the following weight percentages:

[0048]

[0049] In some embodiments, 1-5% by mass of auxiliary stabilizer B is also included, and the auxiliary stabilizer B is a stearate compound. The stearate compound can react with the substances decomposed by PVC under heat to prevent decomposition, and can also be used as an excellent lubricating, dispersing, stabilizing agent and release agent, as well as for improving the transparency or translucency of plastic rubber. The stearate compound can replace the unstable allyl chlorine atoms or tertiary carbon chlorine atoms in the PVC molecule, eliminating the unstable structural factors that cause thermal degradation of PVC, and can also react with the conjugated polyene sequence generated by thermal degradation of PVC to destroy the formation of a large conjugated system and reduce coloring.

[0050] In some embodiments, the antioxidant B is also included in an amount of 3-10% by mass, and the antioxidant B is a benzene ring phosphate compound. The benzene ring phosphate compound reduces the oxidative degradation of the PVC material during processing or use by capturing free radicals or decomposing peroxides, thereby extending the service life of the material. The benzene ring phosphate compound contains phosphorus and can form chelates with metal ions such as copper, thereby preventing the catalytic degradation of the copper ions on the PVC material and reducing the discoloration and corrosion caused by the copper ions. When the benzene ring phosphate compound is used in combination with other stabilizers (such as metal soap stabilizers), a synergistic effect can be produced to improve the overall stability and anti-copper rust effect of the PVC material.

[0051] In some embodiments, the primary stabilizer is at least one of zinc benzoate and zinc p-tert-butylbenzoate.

[0052] In some embodiments, the auxiliary stabilizer B is at least one of magnesium stearate, calcium stearate and lanthanum stearate. Magnesium stearate can also be used as a light stabilizer, which can inhibit the aging effect of ultraviolet rays on the film and extend the service life of the agricultural film. And magnesium stearate has a flame retardant effect in plastic rubber.

[0053] In some embodiments, the secondary stabilizer A is at least one of oleamide, erucamide, stearamide, lauric acid amide and linoleamide.

[0054] In some embodiments, the color suppressant is at least one of a dihydropyridine methyl ester, a dihydropyridine ethyl ester, and a dihydropyridine dodecanol ester.

[0055] In some embodiments, the antioxidant A is 5,7-di-tert-butyl-3-(3,4-dimethylphenyl)benzofuran-2(3H)-one.

[0056] In some embodiments, the hydrotalcite is at least one of magnesium aluminum hydrotalcite and magnesium aluminum zinc ternary hydrotalcite.

[0057] According to the second aspect of the present application, the present application also provides a method for preparing an environmentally friendly stabilizer with an anti-corrosion function, comprising the following steps:

[0058] S1, putting the main stabilizer, the auxiliary stabilizer A, the color suppressant and the hydrotalcite into a mixer in sequence and mixing them evenly to obtain a mixture A;

[0059] S2, adding antioxidant A into a mixer and mixing it with mixture A to obtain mixture B;

[0060] S3, putting the light stabilizer into a mixer and mixing it evenly with the mixture B, and obtaining the environmentally friendly stabilizer with anti-rust function after cooling.

[0061] In some embodiments, in step S1, the rotation speed of the mixer is 800-1250 rpm, the mixing temperature is 45-55° C., and the mixing time is 15-25 min.

[0062] In some embodiments, in step S2, the mixing temperature is 45-50°C, and the mixing time is 5-10 min.

[0063] In some embodiments, in step S2, the mixing temperature is 45-55°C, the mixing time is 5-10 min, and the temperature after cooling is 35-40°C.

[0064] To make the technical solutions and advantages of the present invention more clear, the present invention and its beneficial effects will be further described in detail below in conjunction with specific implementation methods, but the implementation methods of the present invention are not limited thereto.

[0065] Example 1

[0066] This embodiment provides an environmentally friendly stabilizer with an anti-corrosion function, which is prepared by the following steps:

[0067] S1. Put the main stabilizer, auxiliary stabilizer A, color inhibitor and hydrotalcite into a high-speed mixer at a speed of 1000 rpm in sequence, and mix them at 45° C. for 15 min to obtain a mixture A;

[0068] S2, adding antioxidant A into a mixer, mixing at 45°C for 5 minutes, and mixing evenly with mixture A to obtain mixture B;

[0069] S3. Add the light stabilizer into a mixer, mix at 55° C. for 10 min, mix evenly with mixture B, and cool the material to 35° C. to obtain the environmentally friendly stabilizer with anti-rust function.

[0070] The mass percentage of each component is: main stabilizer 30%, auxiliary stabilizer A 3%, auxiliary stabilizer B 3%, color inhibitor 3%, antioxidant A 3%, antioxidant B 8%, light stabilizer 10%, and hydrotalcite 40%.

[0071] Among them, the main stabilizer is zinc p-tert-butylbenzoate, the auxiliary stabilizer A is oleic acid amide, the auxiliary stabilizer B is magnesium stearate, the color inhibitor is dihydropyridine methyl ester, the antioxidant A is 5,7-di-tert-butyl-3-(3,4-xylyl)benzofuran-2(3H)-one, the antioxidant B is monophenyl di(C12-C14 alcohol) phosphite, the light stabilizer is cycla, and the hydrotalcite is magnesium aluminum hydrotalcite.

[0072] Example 2

[0073] Different from Example 1, this embodiment provides an environmentally friendly stabilizer with anti-corrosion function, including the following raw materials in percentage by mass: 30% main stabilizer, 5% auxiliary stabilizer A, 5% auxiliary stabilizer B, 5% color inhibitor, 5% antioxidant A, 10% antioxidant B, 5% light stabilizer, and 35% hydrotalcite.

[0074] The rest is the same as in Example 1 and will not be described again here.

[0075] Example 3

[0076] Different from Example 1, this embodiment provides an environmentally friendly stabilizer with anti-corrosion function, including the following raw materials in percentage by mass: 10% main stabilizer, 5% auxiliary stabilizer A, 5% auxiliary stabilizer B, 5% color inhibitor, 5% antioxidant A, 10% antioxidant B, 10% light stabilizer, and 50% hydrotalcite.

[0077] The rest is the same as in Example 1 and will not be described again here.

[0078] Example 4

[0079] Different from Example 1, this embodiment provides an environmentally friendly stabilizer with anti-corrosion function, including the following raw materials in percentage by mass: main stabilizer 25%, auxiliary stabilizer A 3%, auxiliary stabilizer B 3%, color inhibitor 3%, antioxidant A 3%, antioxidant B 5%, light stabilizer 8%, and hydrotalcite 50%.

[0080] The rest is the same as in Example 1 and will not be described again here.

[0081] Example 5

[0082] Different from Example 1, the main stabilizer in the environmentally friendly stabilizer with anti-corrosion function of this embodiment is zinc benzoate, the auxiliary stabilizer A is erucic acid amide, the auxiliary stabilizer B is calcium stearate, the color inhibitor is dihydropyridine ethyl ester, the antioxidant A is 3-arylbenzofuranone, and the hydrotalcite is magnesium aluminum zinc ternary hydrotalcite.

[0083] The rest is the same as in Example 1 and will not be described again here.

[0084] Example 6

[0085] Different from Example 1, the auxiliary stabilizer A in the environmentally friendly stabilizer with anti-corrosion function of this embodiment is stearic acid amide, the auxiliary stabilizer B is lanthanum stearate, and the color inhibitor is dihydropyridine dodecanol ester.

[0086] The rest is the same as in Example 1 and will not be described again here.

[0087] Comparative Example 1

[0088] Different from Example 1, this example does not contain an environmentally friendly stabilizer with an anti-corrosion function.

[0089] The rest is the same as in Example 1 and will not be described again here.

[0090] Comparative Example 2

[0091] Different from Example 1, the antioxidant A in the environmentally friendly stabilizer with anti-corrosion function of this example is pentaerythritol ester.

[0092] The rest is the same as in Example 1 and will not be described again here.

[0093] Comparative Example 3

[0094] Different from Example 1, the auxiliary stabilizer A in the environmentally friendly stabilizer with anti-corrosion function in this example is polysiloxane.

[0095] The rest is the same as in Example 1 and will not be described again here.

[0096] The following performance tests were performed on the environmentally friendly stabilizers of the embodiments and comparative examples, and the test results are shown in Table 1.

[0097] Test method: The environmentally friendly stabilizers with anti-corrosion function of Examples 1-6 were respectively prepared into stabilizer solutions with a concentration of 5%, and the prepared stabilizer solutions and copper wire with a purity of 99.9% were placed in a test tube. After the test tube was placed in a 90°C constant temperature water bath for 7 hours, the surface oxidation phenomenon of the copper wire was observed, and then placed in a room temperature environment and observed for 7 days, 14 days, and 21 days to observe the surface oxidation phenomenon of the copper wire.

[0098] In the test tube of Comparative Example 1, no environmentally friendly stabilizer with anti-corrosion function was added, and only purified water was added.

[0099] Table 1

[0100]

[0101]

[0102] From the data comparison of Examples 1-6 and Comparative Examples 1-3 in Table 1, it can be seen that the environmentally friendly stabilizer with anti-corrosion function provided by the present application comprises the following raw materials in percentage by mass: 10-35% of main stabilizer, 1-5% of auxiliary stabilizer A, 1-5% of color inhibitor, 1-5% of antioxidant A, 5-10% of light stabilizer, and 20-50% of hydrotalcite. Compared with the traditional anti-copper rust agent, the environmentally friendly stabilizer with anti-corrosion function provided by the present invention can solve the problem of copper rust prevention, and on the basis of having high transparency and excellent initial coloring performance, improve the stability of PVC, prevent its degradation and discoloration, and thus extend the service life of PVC products.

[0103] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs can also change and modify the above embodiment. Therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the present invention belongs to the protection scope of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. An environmentally friendly stabilizer with anti-corrosion function, characterized in that: The raw material composition includes the following mass percentages: The main stabilizer is zinc benzoate and its derivatives; The main stabilizer B is a stearate compound; The auxiliary stabilizer A is an amide compound; The color inhibitor is a dihydropyridine derivative; The antioxidant A is a benzofuranone derivative; The light stabilizer is cyanamide.

2. The environmentally friendly stabilizer with anti-corrosion function according to claim 1, characterized in that: The raw material composition includes the following mass percentages:

3. The environmentally friendly stabilizer with anti-corrosion function according to claim 1, characterized in that: The invention also includes 1-5% by mass of an auxiliary stabilizer B, wherein the auxiliary stabilizer B is a stearate compound.

4. The environmentally friendly stabilizer with anti-corrosion function according to claim 1, characterized in that: The invention also comprises 3-10% by mass of an antioxidant B, wherein the antioxidant B is a benzene ring phosphate compound.

5. The environmentally friendly stabilizer having anti-rust function according to claim 1, characterized in that, The main stabilizer is at least one of zinc benzoate and zinc p-tert-butylbenzoate.

6. The environmentally friendly stabilizer with anti-corrosion function according to claim 1, characterized in that: The auxiliary stabilizer B is at least one of magnesium stearate, calcium stearate and lanthanum stearate.

7. The environmentally friendly stabilizer with anti-corrosion function according to claim 1, characterized in that: The auxiliary stabilizer A is at least one of oleamide, erucamide, stearamide, lauric acid amide and linoleamide.

8. The environmentally friendly stabilizer with anti-corrosion function according to claim 1, characterized in that: The color inhibitor is at least one of dihydropyridine methyl ester, dihydropyridine ethyl ester and dihydropyridine dodecanol ester.

9. The environmentally friendly stabilizer with anti-corrosion function according to claim 1, characterized in that: The antioxidant A is 5,7-di-tert-butyl-3-(3,4-xylyl)benzofuran-2(3H)-one.

10. The environmentally friendly stabilizer with anti-corrosion function according to claim 1, characterized in that: The hydrotalcite is at least one of magnesium-aluminum hydrotalcite and magnesium-aluminum-zinc ternary hydrotalcite.

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