Anti-corrosion hydrophobic coating and preparation method thereof, anti-corrosion hydrophobic polyurethane sponge and low-pressure steam cross-linking disc

Abstract

The invention belongs to the field of cable production, and particularly relates to an anti-corrosion hydrophobic coating, a preparation method of the anti-corrosion hydrophobic coating, anti-corrosion hydrophobic polyurethane sponge and a low-pressure steam cross-linking drum tool, and the anti-corrosion hydrophobic coating comprises the following components in parts by weight: 24-48 parts of absolute ethyl alcohol; 1 to 5 parts of long-chain alkyl trimethoxy silane; the anticorrosive hydrophobic coating provided by the invention can be attached to the surface of a sponge or a disc to form a protective layer and has a hydrophobic effect, and in a steam crosslinking process, water vapor is blocked outside the anticorrosive hydrophobic coating, cannot be gathered on the surface and cannot erode the disc, so that an anticorrosive effect is achieved.

Description

Technical Field

[0001] The invention relates to the field of cable production, and in particular to an anti-corrosion hydrophobic coating and a preparation method thereof, an anti-corrosion hydrophobic polyurethane sponge and a low-pressure steam cross-linking disc. Background Art

[0002] Wet crosslinking refers to a crosslinking method that uses steam as a heating and pressurizing medium in a vulcanized tube, also known as steam crosslinking. During the crosslinking process, when the peroxide reaches the decomposition temperature, volatile gases such as methane, ethane, and water vapor will be generated.

[0003] Traditional iron plates are prone to corrosion after being cross-linked by steam, which affects the service life of the plates. Even if they are painted, the corrosion time can only be slightly reduced. Although stainless steel plates can be used as substitutes, the cost of stainless steel plates is much more expensive than ordinary iron plates, which greatly increases the production costs of enterprises.

[0004] Therefore, those skilled in the art are committed to developing an anti-corrosion hydrophobic coating and a preparation method thereof, an anti-corrosion hydrophobic polyurethane sponge and a low-pressure steam cross-linked tray. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an anti-corrosion hydrophobic coating and a preparation method thereof, an anti-corrosion hydrophobic polyurethane sponge and a low-pressure steam cross-linked tray.

[0006] To achieve the above object, the present invention provides an anticorrosive hydrophobic coating, comprising the following components in parts by weight:

[0007] 24-48 parts of anhydrous ethanol; 1-5 parts of long-chain alkyltrimethoxysilane; 1-6 parts of dilute hydrochloric acid.

[0008] Preferably, the concentration of the dilute hydrochloric acid is 1%-5%.

[0009] Preferably, the long-chain alkyltrimethoxysilane is at least one of hexadecyltrimethoxysilane, octadecyltrimethoxysilane and dodecyltrimethoxysilane.

[0010] The present invention also provides a method for preparing any of the above anticorrosive hydrophobic coatings, comprising the following steps:

[0011] S1, mixing anhydrous ethanol and long-chain alkyltrimethoxysilane in proportion;

[0012] S2. Prepare a dilute hydrochloric acid solution with a concentration of 1% to 5% by mixing with deionized water;

[0013] S3. Use the dilute hydrochloric acid solution in step S2 to add dropwise to adjust the pH of the solution prepared in step S1 until the solution in step S1 turns milky white.

[0014] Preferably, in step S1, the mixing ratio of anhydrous ethanol and long-chain alkyltrimethoxysilane is 24:1.

[0015] The present invention also provides an anti-corrosion hydrophobic polyurethane sponge, comprising any of the above-mentioned anti-corrosion hydrophobic coatings.

[0016] Preferably, the polyurethane sponge is immersed in the anticorrosive hydrophobic coating for 3h-6h, taken out after the immersion is completed, and placed at a temperature of 40°C-70°C for 12h-24h to obtain the sponge.

[0017] Preferably, the polyurethane sponge is immersed in the anti-corrosion hydrophobic coating for 3 hours.

[0018] Preferably, after removing the anti-corrosion and hydrophobic coating from the polyurethane sponge, the temperature is kept at 50° C. for 12 hours.

[0019] The present invention also provides an anti-corrosion hydrophobic low-pressure steam cross-linked tray, comprising any of the above-described anti-corrosion hydrophobic polyurethane sponges, and also comprising a tray body, wherein the anti-corrosion hydrophobic polyurethane sponge is wrapped outside the tray body.

[0020] The beneficial effects of the present invention are: the present invention provides an anti-corrosion hydrophobic coating, which can be attached to the surface of a sponge or a plate to form a protective layer, and has a hydrophobic effect. During the steam cross-linking process, water vapor is blocked outside the anti-corrosion hydrophobic layer and cannot gather on the surface, and cannot corrode the plate, thereby achieving an anti-corrosion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an infrared spectrum of the anticorrosive hydrophobic coating prepared by the present invention.

[0022] Figure 2 It is a schematic diagram of the hydrophobic effect of a specific embodiment of the present invention.

[0023] Figure 3 It is a hydrophobic principle diagram of a specific embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as limiting the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] Example 1

[0026] Prepare 24 parts by weight of anhydrous ethanol and 1 part by weight of hexadecyltrimethoxysilane.

[0027] S1, mixing anhydrous ethanol and hexadecyltrimethoxysilane to form a solution;

[0028] S2. Prepare a portion of 1% dilute hydrochloric acid;

[0029] S3. Add about 6 ml of dilute hydrochloric acid dropwise into a solution formed by mixing anhydrous ethanol and hexadecyltrimethoxysilane, and slowly adjust the pH value thereof until the solution turns milky white, thereby obtaining an anticorrosive hydrophobic coating.

[0030] Example 2

[0031] Prepare 48 parts by weight of anhydrous ethanol and 5 parts by weight of octadecyltrimethoxysilane.

[0032] S1, mixing anhydrous ethanol and octadecyltrimethoxysilane to form a solution;

[0033] S2. Prepare a portion of 5% dilute hydrochloric acid;

[0034] S3. Add about 1.2 ml of dilute hydrochloric acid dropwise into a solution formed by mixing anhydrous ethanol and octadecyltrimethoxysilane, and slowly adjust the pH value thereof until the solution turns milky white, thereby obtaining an anticorrosive hydrophobic coating.

[0035] Example 3

[0036] Prepare 36 parts by weight of anhydrous ethanol and 2.5 parts by weight of dodecyltrimethoxysilane.

[0037] S1, mixing anhydrous ethanol and dodecyltrimethoxysilane to form a solution;

[0038] S2. Prepare a portion of 2.5% dilute hydrochloric acid;

[0039] S3. Add approximately 3 ml of dilute hydrochloric acid dropwise into a solution formed by mixing anhydrous ethanol and dodecyltrimethoxysilane, and slowly adjust the pH value thereof until the solution turns milky white, thereby obtaining an anticorrosive hydrophobic coating.

[0040] like Figure 1The infrared spectrum of the anticorrosive hydrophobic coating in Example 1 of the present application is shown, wherein the peak at 1076 cm-1 is the stretching vibration peak of Si-O on the polysiloxane chain, the peak at 1505 cm-1 is the bending vibration peak of the CH bond in -CH2 and -CH3, and the peaks at 2910 cm-1 and 2850 cm-1 are the stretching of the CH bond caused by the polycondensation reaction of hexadecyltrimethoxysilane, as shown in FIG. Figure 2-3 As shown, hexadecyltrimethoxysilane will hydrolyze under acidic conditions to generate an organic silicon molecule with -OH at one end and a long hydrophobic chain at the other end. The Si-OH of each organic silicon molecule can be grafted onto the surface of an object and further hydrolyzed to form a long silane chain. The hydrophobic long chain is exposed to the outside and forms a stable hydrophobic surface layer after drying for a certain period of time.

[0041] In addition, the present invention also provides an anti-corrosion hydrophobic polyurethane sponge, comprising any of the above anti-corrosion hydrophobic coatings, and a preparation method thereof comprises the following steps:

[0042] S4, immersing the polyurethane sponge in the anticorrosive hydrophobic coating for 3h-6h, and in this embodiment, the immersion time is 3h;

[0043] S5. Take out the polyurethane sponge and place it at a temperature of 40° C.-70° C. for 12 h-24 h. In this embodiment, the polyurethane sponge is placed at a temperature of 50° C. and a placement time of 12 h after being taken out from the anti-corrosion hydrophobic coating.

[0044] The present invention also provides an anti-corrosion, hydrophobic, low-pressure steam cross-linked tray, comprising an anti-corrosion, hydrophobic polyurethane sponge as described above, and a tray body, wherein the anti-corrosion, hydrophobic polyurethane sponge is wrapped outside the tray body. In practice, the tray without the anti-corrosion, hydrophobic polyurethane sponge begins to rust in 3-6 months and has a service life of about 3 years. After adding the anti-corrosion, hydrophobic polyurethane sponge of the present application, the service life of the tray can be increased to 5-6 years, which effectively slows down the corrosion rate of the tray, reduces the number and quantity of tray purchases, saves money, reduces workload, and has great practical promotion value.

[0045] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An anticorrosive hydrophobic coating, characterized in that: The composition comprises the following components in parts by weight: 24-48 parts of anhydrous ethanol; 1-5 parts of long chain alkyl trimethoxysilane; 1-6 parts of dilute hydrochloric acid.

2. The anticorrosive hydrophobic coating according to claim 1, characterized in that: The concentration of the dilute hydrochloric acid is 1%-5%.

3. The anticorrosive hydrophobic coating according to claim 1, characterized in that: The long-chain alkyltrimethoxysilane is at least one of hexadecyltrimethoxysilane, octadecyltrimethoxysilane and dodecyltrimethoxysilane.

4. A method for preparing an anticorrosive hydrophobic coating as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: S1, mixing anhydrous ethanol and long-chain alkyltrimethoxysilane in proportion; S2. Prepare a dilute hydrochloric acid solution with a concentration of 1% to 5% by mixing with deionized water; S3. Use the dilute hydrochloric acid solution in step S2 to add dropwise to adjust the pH of the solution prepared in step S1 until the solution in step S1 turns milky white.

5. The method for preparing the anticorrosive hydrophobic coating according to claim 4, characterized in that: In step S1, the mixing ratio of anhydrous ethanol and long-chain alkyltrimethoxysilane is 24:

1.

6. An anticorrosive hydrophobic polyurethane sponge, characterized in that: Comprising the anti-corrosion hydrophobic coating as described in any one of claims 1-3.

7. The anticorrosive hydrophobic polyurethane sponge according to claim 6, characterized in that: The method is prepared by immersing the polyurethane sponge in the anticorrosive hydrophobic coating for 3 hours to 6 hours, taking out the sponge after the immersion is completed, and placing the sponge at a temperature of 40° C. to 70° C. for 12 hours to 24 hours.

8. The anticorrosive hydrophobic polyurethane sponge according to claim 7, characterized in that: The polyurethane sponge was immersed in the anti-corrosion hydrophobic coating for 3 hours.

9. The anticorrosive hydrophobic polyurethane sponge according to claim 7, characterized in that: After the anti-corrosion and hydrophobic coating of the polyurethane sponge is removed, the temperature is kept at 50° C. and the storage time is 12 hours.

10. An anti-corrosion hydrophobic low-pressure steam cross-linked plate, comprising the anti-corrosion hydrophobic polyurethane sponge according to any one of claims 6 to 9, characterized in that: It also includes a tray body, and the antiseptic hydrophobic polyurethane sponge is wrapped outside the tray body.

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