CN112812650A - Composite cable coating and preparation method thereof - Google Patents
Composite cable coating and preparation method thereof Download PDFInfo
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- CN112812650A CN112812650A CN202110165008.3A CN202110165008A CN112812650A CN 112812650 A CN112812650 A CN 112812650A CN 202110165008 A CN202110165008 A CN 202110165008A CN 112812650 A CN112812650 A CN 112812650A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C09D161/32—Modified amine-aldehyde condensates
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
Abstract
The application relates to the field of cables, and particularly discloses a composite cable coating and a preparation method thereof. The composite cable coating comprises the following raw materials: diethyl tartrate, melamine formaldehyde resin, heavy calcium carbonate, talcum powder, triethanolamine and a cross-linking agent; the preparation method comprises the following steps: stirring and uniformly mixing diethyl tartrate, melamine formaldehyde resin, triethanolamine and a cross-linking agent, heating and stirring for reaction, adding coarse whiting and talcum powder, stirring for reaction, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of a cable, and drying to prepare the composite cable coating. According to the composite cable coating, diethyl tartrate and melamine formaldehyde resin are added into raw materials, and are crosslinked under a certain condition, so that the melamine formaldehyde resin is modified, and a product obtained by crosslinking has excellent water resistance, weather resistance and oil resistance, so that the corrosion resistance of the prepared composite cable coating is improved.
Description
Technical Field
The application relates to the field of cables, in particular to a composite cable coating and a preparation method thereof.
Background
A cable is a type of electrical equipment widely used in industry.
Chinese utility model patent with patent publication No. CN204288869U discloses a cable, including 4 insulating inner cores, insulating inner core comprises conductor and the cladding at conductor outlying insulating inlayer, still includes the + type separate area of separating 4 insulating inner cores, and + type separate area cross department is equipped with anti tractive part, is the filler in the middle of + type separate area and the insulating inner core, and + type separate area periphery is equipped with the soft copper-plated protective layer, and the protective layer periphery is equipped with the oversheath.
The outer sheath is typically polyethylene. In production places of industries such as chemical industry, pharmacy, oil fields and the like, under the condition that a cable is in an acid-base solution or an organic solvent for a long time, the acid-base solution or the organic solvent easily penetrates through an outer sheath, a protective layer and an insulating inner layer to corrode a conductor, so that the performance of the cable is reduced, the service life is shortened, the cable needs to be replaced frequently, the resource waste is caused, great loss is brought to enterprises, and the improvement is needed.
Disclosure of Invention
In order to solve the problem of insufficient corrosion resistance of the cable, the application provides a composite cable coating and a preparation method thereof.
The composite cable coating and the preparation method thereof adopt the following technical scheme:
in a first aspect, the present application provides a composite cable coating, which adopts the following technical scheme:
a composite cable coating comprises the following raw materials in parts by weight:
45-55 parts of diethyl tartrate;
20-30 parts of melamine formaldehyde resin;
7-12 parts of heavy calcium carbonate;
6-10 parts of talcum powder;
6-10 parts of triethanolamine;
0.8-1.2 parts of a crosslinking agent.
By adopting the technical scheme, diethyl tartrate and melamine formaldehyde resin are crosslinked under the action of the crosslinking agent and high temperature, so that the melamine formaldehyde resin is modified, the product obtained by crosslinking has excellent water resistance and weather resistance, the product obtained by crosslinking forms a net structure, an organic solvent is difficult to permeate the composite cable coating, the influence on the internal structure of the composite cable coating is reduced, the oil resistance of the prepared composite cable coating is improved, and the corrosion resistance of the prepared composite cable coating is better.
The heavy calcium has the characteristics of high inertia, difficult chemical reaction and good thermal stability, the talcum powder has good acid resistance and inactive chemical property, the whole property of the composite cable coating is more stable after the heavy calcium and the talcum powder are added into the raw materials of the composite cable coating and mixed and melted, and the composite cable coating is not easy to corrode due to the chemical reaction when the composite cable coating is corroded by acid, alkali and/or organic solvents, so that the whole corrosion resistance of the composite cable coating is improved.
The triethanolamine is used as a solvent, so that the compatibility between the diethyl tartrate and the melamine formaldehyde resin is improved, the mixing and melting of the diethyl tartrate and the melamine formaldehyde resin are more uniform, the crosslinking reaction is more thorough, and the corrosion resistance of the prepared composite cable coating is favorably and indirectly improved.
After the composite cable coating is coated on the surface of the cable, the corrosion resistance of the cable can be improved, the reduction of the performance of the cable is delayed, and the service life of the cable is prolonged.
Preferably, the raw materials also comprise 10-15 parts of 2- (4-chlorophenoxy) -1-chloroethane and 2-5 parts of sodium hydroxide in parts by weight.
By adopting the technical scheme, under the alkaline environment provided by sodium hydroxide, the cross-linking product of diethyl tartrate and melamine formaldehyde resin is substituted by 2- (4-chlorophenoxy) -1-chloroethane, hydrogen on the hydroxyl on the molecular structure of the cross-linking product and chlorine on the molecular structure of the 2- (4-chlorophenoxy) -1-chloroethane form hydrogen chloride to be removed, the rest groups on the molecular structure of the 2- (4-chlorophenoxy) -1-chloroethane are connected to the molecular structure of the cross-linking product, thereby closing the hydroxyl on the molecular structure of the cross-linking product, the water repellency of the prepared composite cable coating is improved, the condition that the composite cable coating is corroded due to the fact that water in air and rain permeates the composite cable coating is reduced, and therefore the corrosion resistance of the prepared composite cable coating is improved.
Preferably, the raw materials also comprise 6-8 parts of palm oil by weight.
By adopting the technical scheme, after palm oil is added into the raw materials of the composite cable coating and mixed, the overall lubricity of the composite cable coating can be improved, and a layer of oil film is formed on the surface of the composite cable coating; meanwhile, due to the crosslinking of the diethyl tartrate and the melamine formaldehyde resin in the composite cable coating, although the organic solvent can be dissolved with the palm oil to a certain extent, the organic solvent is not easy to permeate the composite cable coating and further corrodes the cable, so that the corrosion resistance of the composite cable coating can be further improved by adjusting the proportion among the palm oil, the diethyl tartrate and the melamine formaldehyde resin.
Preferably, the raw materials also comprise 5-8 parts of polystyrene and 0.8-1.0 part of ammonium persulfate according to parts by weight.
By adopting the technical scheme, the rigidity and the chemical corrosion resistance of the polystyrene are good, a large amount of unsaturated fatty acid and saturated fatty acid are contained in the palm oil, the palm oil and the polystyrene can be compounded under the initiation of ammonium persulfate, and experiments show that the acid and alkali resistance of the prepared composite cable coating is improved, so that the corrosion resistance of the composite cable coating is further improved.
Preferably, the raw materials also comprise 5-8 parts of p-hydroxyanisole in parts by weight.
By adopting the technical scheme, after the p-hydroxyanisole and the diethyl tartrate are stirred and mixed, the oxygen atom on the carbonyl in the molecular structure of the diethyl tartrate and the hydrogen atom on the hydroxyl in the molecular structure of the hydroxyanisole can be combined by hydrogen bonds to form a complex, and after the prepared composite coating is coated on the surface of a cable to form a composite cable coating, the complex is adsorbed on the surface of the cable, so that the adsorbability between the composite cable coating and the cable is improved, and the composite cable coating is not easy to fall off from the surface of the cable.
Preferably, the cross-linking agent is succinic anhydride.
By adopting the technical scheme, the succinic anhydride is taken as the cross-linking agent, so that the cross-linking of diethyl tartrate and melamine formaldehyde resin can be promoted, the adhesion and the water resistance of the prepared composite coating can be improved, the water resistance of the composite cable coating and the adsorbability between the composite cable coating and a cable can be further improved, and the corrosion resistance of the cable after the composite cable coating is formed can be indirectly improved.
In a second aspect, the present application provides a method for preparing a composite cable coating, which adopts the following technical scheme:
a preparation method of a composite cable coating comprises the following steps: stirring and uniformly mixing diethyl tartrate, melamine formaldehyde resin, triethanolamine and a cross-linking agent, heating to 90-100 ℃, stirring and reacting for 1.5-2h, adding coarse whiting and talcum powder, stirring for 3-5min, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of a cable, and drying at room temperature to prepare the composite cable coating.
Preferably, 5-8 parts of diethyl tartrate and 5-8 parts of p-hydroxyanisole are stirred and reacted for 20-30min at the temperature of 40-50 ℃ to prepare a product I; introducing nitrogen, heating to 50-60 ℃, uniformly stirring and mixing 6-8 parts of palm oil, 5-8 parts of polystyrene and 0.8-1.0 part of ammonium persulfate, and reacting for 2-3 hours under the protection of nitrogen to obtain a second product; and uniformly stirring and mixing the rest diethyl tartrate, 20-30 parts of melamine formaldehyde resin, 6-10 parts of triethanolamine and 0.8-1.2 parts of cross-linking agent, heating to 90-100 ℃, stirring and reacting for 1.5-2h, then adding 10-15 parts of 2- (4-chlorophenoxy) -1-chloroethane and 2-5 parts of sodium hydroxide, stirring and reacting for 40-50min, then adding the product I and the product II, stirring for 4-10min, finally adding coarse whiting and talcum powder, stirring for 3-5min, cooling to room temperature to obtain a composite coating, coating the composite coating on the outer side of the cable, and drying at room temperature to obtain the composite cable coating.
By adopting the technical scheme, the reaction of diethyl tartrate and p-hydroxyanisole and the reaction of palm oil and polystyrene are carried out separately, and then the reaction products are mixed, so that the interference of other components on the reaction is reduced, and the reaction products of diethyl tartrate and p-hydroxyanisole and the reaction products of palm oil and polystyrene can be obtained.
In summary, the present application has the following beneficial effects:
1. according to the preparation method, diethyl tartrate and melamine formaldehyde resin are adopted, and are crosslinked under the action of a crosslinking agent and high temperature, so that the melamine formaldehyde resin is modified, the product obtained by crosslinking has excellent water resistance and weather resistance, the oil resistance of the prepared composite cable coating is improved, and the corrosion resistance of the prepared composite cable coating is better;
2. in the application, 2- (4-chlorophenoxy) -1-chloroethane and sodium hydroxide are preferably adopted, and under the alkaline environment provided by the sodium hydroxide, a cross-linked product of diethyl tartrate and melamine formaldehyde resin is substituted with the 2- (4-chlorophenoxy) -1-chloroethane, so that hydroxyl on a molecular structure of the cross-linked product is sealed, the water repellency of the prepared composite cable coating is improved, and the corrosion resistance of the prepared composite cable coating is improved;
3. according to the method, the reaction of diethyl tartrate and p-hydroxyanisole and the reaction of palm oil and polystyrene are carried out separately, and then the reaction products are mixed, so that the interference of other components on the reaction is reduced, and the reaction products of diethyl tartrate and p-hydroxyanisole and the reaction products of palm oil and polystyrene can be obtained.
Detailed Description
The present application will be described in further detail with reference to examples.
Diethyl tartrate is purchased from Shanghai Hongpo chemical company Limited, the content of the diethyl tartrate is 99 percent, the melting point of the diethyl tartrate is 18.7 ℃, and the free acid is less than 0.1 percent; melamine formaldehyde resin was purchased from Shandong Wangshi New Material science and technology Co., Ltd, type: WS-101530; the coarse whiting is purchased from Harmonious coarse whiting factories in Jian De City and passes through 400 meshes; 2- (4-chlorophenoxy) -1-chloroethane was purchased from Huapai chemical industry, Limited liability company in salt cities; the palm oil is 52-degree palm oil produced by Guangzhou Jiana chemical company Limited; polystyrene was purchased from Hangzhou Kaimei chemical Co., Ltd; p-hydroxyanisole was purchased from Baishi chemical Co., Ltd, Tianjin.
The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified.
Examples
Example 1
The application discloses composite cable coating, composite cable coating includes following raw materials: diethyl tartrate, melamine formaldehyde resin, heavy calcium carbonate, talcum powder, triethanolamine and a cross-linking agent, wherein the cross-linking agent adopts succinic anhydride, and the content of each component is shown in the following table 1.
The preparation method of the composite cable coating comprises the following steps: stirring and uniformly mixing diethyl tartrate, melamine formaldehyde resin, triethanolamine and a cross-linking agent, heating to 90 ℃, stirring and reacting for 1.5h, adding heavy calcium carbonate and talcum powder, stirring for 3min, cooling to room temperature to obtain a composite coating, coating the composite coating on the outer side of a cable, and drying at room temperature to obtain the composite cable coating.
Example 2
The application discloses composite cable coating, composite cable coating includes following raw materials: diethyl tartrate, melamine formaldehyde resin, heavy calcium carbonate, talcum powder, triethanolamine and a cross-linking agent, wherein the cross-linking agent adopts succinic anhydride, and the content of each component is shown in the following table 1.
The preparation method of the composite cable coating comprises the following steps: stirring and uniformly mixing diethyl tartrate, melamine formaldehyde resin, triethanolamine and a cross-linking agent, heating to 100 ℃, stirring for reacting for 2 hours, adding coarse whiting and talcum powder, stirring for 5 minutes, cooling to room temperature to obtain a composite coating, coating the composite coating on the outer side of a cable, and drying at room temperature to obtain the composite cable coating.
Example 3
The application discloses composite cable coating, composite cable coating includes following raw materials: diethyl tartrate, melamine formaldehyde resin, heavy calcium carbonate, talcum powder, triethanolamine and a cross-linking agent, wherein the cross-linking agent adopts succinic anhydride, and the content of each component is shown in the following table 1.
The preparation method of the composite cable coating comprises the following steps: stirring and uniformly mixing diethyl tartrate, melamine formaldehyde resin, triethanolamine and a cross-linking agent, heating to 95 ℃, stirring and reacting for 1.5h, adding coarse whiting and talcum powder, stirring for 4min, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of a cable, and drying at room temperature to prepare the composite cable coating.
Example 4
The difference from example 1 is that 2- (4-chlorophenoxy) -1-chloroethane and sodium hydroxide were added to the raw materials for composite cable coating, and the contents of the components are shown in table 1 below.
The preparation method of the composite cable coating comprises the following steps: uniformly stirring and mixing diethyl tartrate, melamine formaldehyde resin, triethanolamine and a cross-linking agent, heating to 90 ℃, stirring and reacting for 1.5h, adding 2- (4-chlorophenoxy) -1-chloroethane and sodium hydroxide, stirring and reacting for 40min, adding coarse whiting and talcum powder, stirring for 3min, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of a cable, and drying at room temperature to prepare the composite cable coating.
Example 5
The difference from example 1 is that palm oil is added to the raw material of the composite cable coating, and the content of each component is shown in table 1 below.
The preparation method of the composite cable coating comprises the following steps: stirring and uniformly mixing diethyl tartrate, melamine formaldehyde resin, triethanolamine and a cross-linking agent, heating to 90 ℃, stirring and reacting for 1.5h, adding palm oil, stirring for 4min, adding coarse whiting and talcum powder, stirring for 3min, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of a cable, and drying at room temperature to prepare the composite cable coating.
Example 6
The difference from example 5 is that polystyrene and ammonium persulfate are added to the raw materials of the composite cable coating, and the contents of the components are shown in the following table 1.
The preparation method of the composite cable coating comprises the following steps: introducing nitrogen, heating to 50-60 ℃, uniformly stirring and mixing palm oil, polystyrene and ammonium persulfate, and reacting for 2-3 hours under the protection of nitrogen to obtain a second product;
stirring and uniformly mixing diethyl tartrate, melamine formaldehyde resin, triethanolamine and a cross-linking agent, heating to 90 ℃, stirring and reacting for 1.5h, adding the product II, stirring for 4min, finally adding coarse whiting and talcum powder, stirring for 3min, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of a cable, and drying at room temperature to prepare the composite cable coating.
Example 7
The difference from example 1 is that p-hydroxyanisole is added into the raw materials of the composite cable coating, and the content of each component is shown in table 1 below.
The preparation method of the composite cable coating comprises the following steps: stirring 5 parts of diethyl tartrate and p-hydroxyanisole at 40 ℃ for 20min to react to obtain a product I;
stirring and uniformly mixing the rest diethyl tartrate, the melamine formaldehyde resin, the triethanolamine and the cross-linking agent, heating to 90 ℃, stirring and reacting for 1.5h, adding the product I, stirring for 4min, adding the coarse whiting and the talcum powder, stirring for 3min, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of the cable, and drying at room temperature to obtain a composite cable coating example 8
The application discloses composite cable coating, composite cable coating includes following raw materials: diethyl tartrate, melamine formaldehyde resin, heavy calcium carbonate, talcum powder, triethanolamine, a cross-linking agent, 2- (4-chlorophenoxy) -1-chloroethane, sodium hydroxide, palm oil, polystyrene, ammonium persulfate and p-hydroxyanisole, wherein the cross-linking agent adopts succinic anhydride, and the content of each component is shown in the following table 1.
The preparation method of the composite cable coating comprises the following steps: stirring 5 parts of diethyl tartrate and p-hydroxyanisole at 40 ℃ for 20min to react to obtain a product I;
introducing nitrogen, heating to 50 ℃, uniformly stirring and mixing palm oil, polystyrene and ammonium persulfate, and stirring for reacting for 2 hours under the protection of nitrogen to obtain a product II;
and uniformly stirring and mixing the rest diethyl tartrate, the melamine formaldehyde resin, the triethanolamine and the cross-linking agent, heating to 90 ℃, stirring and reacting for 1.5h, adding 2- (4-chlorophenoxy) -1-chloroethane and sodium hydroxide, stirring and reacting for 40min, adding the product I and the product II, stirring for 4min, finally adding the coarse whiting and the talcum powder, stirring for 3min, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of the cable, and drying at room temperature to prepare the composite cable coating.
Example 9
The application discloses composite cable coating, composite cable coating includes following raw materials: diethyl tartrate, melamine formaldehyde resin, heavy calcium carbonate, talcum powder, triethanolamine, a cross-linking agent, 2- (4-chlorophenoxy) -1-chloroethane, sodium hydroxide, palm oil, polystyrene, ammonium persulfate and p-hydroxyanisole, wherein the cross-linking agent adopts succinic anhydride, and the content of each component is shown in the following table 1.
The preparation method of the composite cable coating comprises the following steps: stirring 8 parts of diethyl tartrate and p-hydroxyanisole at 50 ℃ for reaction for 30min to obtain a product I;
introducing nitrogen, heating to 60 ℃, uniformly stirring and mixing palm oil, polystyrene and ammonium persulfate, and stirring for reacting for 3 hours under the protection of nitrogen to obtain a product II;
and uniformly stirring and mixing the rest diethyl tartrate, the melamine formaldehyde resin, the triethanolamine and the cross-linking agent, heating to 100 ℃, stirring and reacting for 2 hours, adding 2- (4-chlorophenoxy) -1-chloroethane and sodium hydroxide, stirring and reacting for 50 minutes, adding the product I and the product II, stirring for 10 minutes, finally adding the coarse whiting and the talcum powder, stirring for 5 minutes, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of the cable, and drying at room temperature to prepare the composite cable coating.
Example 10
The application discloses composite cable coating, composite cable coating includes following raw materials: diethyl tartrate, melamine formaldehyde resin, heavy calcium carbonate, talcum powder, triethanolamine, a cross-linking agent, 2- (4-chlorophenoxy) -1-chloroethane, sodium hydroxide, palm oil, polystyrene, ammonium persulfate and p-hydroxyanisole, wherein the cross-linking agent adopts succinic anhydride, and the content of each component is shown in the following table 1.
The preparation method of the composite cable coating comprises the following steps: stirring 7 parts of diethyl tartrate and p-hydroxyanisole at 45 ℃ for reaction for 25min to obtain a product I;
introducing nitrogen, heating to 55 ℃, uniformly stirring and mixing palm oil, polystyrene and ammonium persulfate, and stirring to react for 2.5 hours under the protection of nitrogen to obtain a product II;
and uniformly stirring and mixing the rest diethyl tartrate, the melamine formaldehyde resin, the triethanolamine and the cross-linking agent, heating to 95 ℃, stirring and reacting for 1.5h, adding 2- (4-chlorophenoxy) -1-chloroethane and sodium hydroxide, stirring and reacting for 45min, adding the product I and the product II, stirring for 7min, finally adding the coarse whiting and the talcum powder, stirring for 4min, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of the cable, and drying at room temperature to prepare the composite cable coating.
Example 11
The difference from example 1 is that dicumyl peroxide is used as the crosslinking agent, and the contents of the components are shown in table 1 below.
Example 12
The difference from example 4 is that 2- (4-chlorophenoxy) -1-chloroethane was replaced with aniline, and the contents of each component are shown in Table 1 below.
Example 13
The difference from example 5 is that palm oil was replaced with glycerol and the contents of the components are shown in table 1 below.
Example 14
The difference from example 6 is that polystyrene was replaced with polyaniline and the contents of the respective components are shown in table 1 below.
Example 15
The difference from example 6 is that ammonium persulfate was replaced with ammonium sulfate and the contents of the components are shown in Table 1 below.
Example 16
The difference from example 15 is that polystyrene was replaced with polyaniline and the contents of the respective components are shown in table 1 below.
Example 17
The difference from example 7 is that p-hydroxyanisole is replaced by phenol, and the contents of the components are shown in table 1 below.
Comparative example
Comparative example 1
The difference from example 1 is that the composite cable coating made of melamine formaldehyde resin is used as a blank control.
Comparative example 2
The difference from example 8 is that the melamine formaldehyde resin was replaced with a polyester resin, and the contents of the components are shown in table 1 below.
Comparative example 3
The difference from example 8 is that diethyl tartrate is replaced by ethyl acetate and the contents of the components are shown in table 1 below.
Comparative example 4
The difference from comparative example 3 is that p-hydroxyanisole is replaced by phenol, and the contents of the components are shown in table 1 below.
Comparative example 5
The difference from comparative example 2 is that diethyl tartrate is replaced by ethyl acetate and the contents of the components are shown in table 1 below.
Comparative example 6
The difference from example 1 is that the heavy calcium is replaced by calcium chloride and the contents of the components are shown in table 1 below.
Comparative example 7
The difference from example 1 is that talc was replaced with magnesium oxide and the contents of the components are shown in table 1 below.
TABLE 1-1 ingredient content table
TABLE 1-2 ingredient content table
Performance test
The composite coatings prepared by the preparation methods of examples 1 to 17 and comparative examples 1 to 7 were respectively applied to the surfaces of polyethylene plastic blocks having the dimensions of 150mm × 150mm × 70mm, and dried to prepare test blocks.
(1) And (3) water resistance measurement: distilled water was added to a glass water tank, the water temperature was adjusted to 25 ± 2 ℃, the test blocks were placed in the water tank, 2/3 of the length of each test block was immersed in distilled water, the time taken for the first foaming of the test block was recorded, the longer the foaming time, the better the water resistance, and the test results are shown in table 2 below.
(2) Determination of salt spray resistance: and (3) debugging the salt spray test box, adjusting the temperature of the spray chamber to 35 +/-2 ℃, placing each test block in the spray chamber, enabling the tested surface of the test block to face upwards and form an included angle of 20 +/-5 degrees with the vertical line, closing the top cover of the spray chamber, opening a test solution storage tank valve, and enabling the solution to flow to a storage tank for testing. After 3 days, the test block was taken out, the test solvent remained on the test block was washed with clean water, and the surface of the test block was examined for the destruction phenomenon by 100 points, the best being 100 points, the lower the point, the more serious the destruction degree, and the test results are shown in table 2 below.
(3) And (3) acid resistance measurement: examples 1, 5-6, 14-16 and comparative example 1 were immersed in 5% hydrochloric acid at room temperature and the time to start flaking off the test piece surface was recorded and the test results are shown in table 2 below.
(4) Alkali resistance measurement: examples 1, 5-6, 14-16 and comparative example 1 were immersed in a 5% sodium hydroxide solution at room temperature and the time to start flaking off the test piece surface was recorded and the test results are shown in table 2 below.
(5) Adhesion test: a test piece coated with the composite coating prepared in examples 1, 7-8 and 17 and comparative examples 1 and 3-4 was scribed 10X 10 cells 10mm X10 mm in depth and polyethylene plastic pieces under the composite coating with a blade having a blade pitch of 5mm (a blade angle of 20 DEG + -5 DEG), the pieces near the cells were brushed clean with a brush, all the cells on each test piece were covered with an adhesive tape, the adhesive tape was not wrinkled and was wiped with an eraser to increase the contact area and force between the adhesive tape and the cells, the adhesive tape was quickly torn off, the number of cells adhered to the tape was recorded, the more the cells adhered, the worse the adhesiveness, and the test results are shown in Table 2 below.
The corrosion resistance of the composite cable coating is characterized by water resistance, salt spray resistance, acid resistance and alkali resistance, and the better the water resistance, salt spray resistance, acid resistance and alkali resistance, the better the corrosion resistance of the composite cable coating.
TABLE 2 test results of examples and comparative examples
In summary, the following conclusions can be drawn:
1. as can be seen by combining example 1 and comparative examples 1-3, 5, and table 2, the co-addition of diethyl tartrate and melamine formaldehyde resin improves the corrosion protection properties of the composite cable coating, probably due to: diethyl tartrate and melamine formaldehyde resin are crosslinked under the action of a crosslinking agent and high temperature, and then the melamine formaldehyde resin is modified, so that a product obtained by crosslinking has excellent water resistance and weather resistance, the product obtained by crosslinking forms a net structure, and an organic solvent is difficult to permeate the composite cable coating, so that the oil resistance of the prepared composite cable coating is improved, and the prepared composite cable coating has better corrosion resistance.
2. As can be seen by combining examples 1 and 11 with Table 2, the use of succinic anhydride as the crosslinking agent improves the corrosion protection and adhesion of the composite cable coating.
3. As can be seen from the combination of examples 1, 4 and 12 and table 2, the co-addition of 2- (4-chlorophenoxy) -1-chloroethane and sodium hydroxide can enhance the corrosion protection properties of the composite cable coating, probably due to: under the alkaline environment provided by sodium hydroxide, a cross-linking product of diethyl tartrate and melamine formaldehyde resin is substituted with 2- (4-chlorophenoxy) -1-chloroethane, and hydroxyl on a molecular structure of the cross-linking product is sealed, so that the water repellency of the prepared composite cable coating is improved, and the corrosion resistance of the prepared composite cable coating is improved.
4. As can be seen from the combination of examples 1, 5 and 13 and from table 2, the addition of palm oil is beneficial for enhancing the corrosion protection properties of the composite cable coating, possibly due to: after the palm oil is added for mixing and melting, the integral lubricity of the composite cable coating can be improved, a layer of oil film is formed on the surface of the composite cable coating, when acid-alkali liquor or rainwater contacts the surface of the composite cable coating, because the water and the oil are not dissolved, the condition that acid alkali liquor or rainwater permeates into the composite cable coating is inhibited, thereby improving the water repellency and the acid and alkali resistance of the composite cable coating, simultaneously because the diethyl tartrate and the melamine formaldehyde resin inside the composite cable coating are crosslinked, although the organic solvent can be mutually dissolved with the palm oil to a certain extent, the organic solvent is not easy to permeate the composite cable coating to corrode the cable, therefore, the relation between the water repellency and the oil resistance of the composite cable coating can be balanced by adjusting the proportion of the palm oil, the diethyl tartrate and the melamine formaldehyde resin, and the corrosion resistance of the composite cable coating is further improved.
5. As can be seen from the combination of examples 1, 5-6, 13-16 and table 2, the corrosion protection performance of the composite cable coating is enhanced by the simultaneous addition of palm oil, polystyrene and ammonium persulfate, which may be due to: the rigidity and the chemical corrosion resistance of the polystyrene are good, the palm oil contains a large amount of unsaturated fatty acid and saturated fatty acid, and the palm oil can be compounded with the polystyrene under the initiation of ammonium persulfate, so that the acid and alkali resistance of the prepared composite cable coating is improved, and the corrosion resistance of the composite cable coating is further improved.
6. As can be seen by combining examples 1, 7, 17 and comparative examples 3-4, and by combining table 2, the co-addition of diethyl tartrate and p-hydroxyanisole improves the adhesion of the composite cable coating, probably because: the oxygen atom on the carbonyl in the diethyl tartrate molecular structure can be combined with the hydrogen atom on the hydroxyl in the hydroxyanisole molecular structure through hydrogen bonds to form a complex, and after the prepared composite coating is coated on the surface of a cable to form a composite cable coating, the complex is adsorbed on the surface of the cable, so that the adhesion between the composite cable coating and the cable is improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The composite cable coating is characterized by comprising the following raw materials in parts by weight:
45-55 parts of diethyl tartrate;
20-30 parts of melamine formaldehyde resin;
7-12 parts of heavy calcium carbonate;
6-10 parts of talcum powder;
6-10 parts of triethanolamine;
0.8-1.2 parts of a crosslinking agent.
2. The composite cable coating of claim 1, wherein: the raw materials also comprise 10-15 parts of 2- (4-chlorophenoxy) -1-chloroethane and 2-5 parts of sodium hydroxide according to parts by weight.
3. The composite cable coating of claim 1, wherein: the raw materials also comprise 6-8 parts of palm oil by weight.
4. The composite cable coating of claim 1, wherein: the raw materials also comprise 5 to 8 parts of polystyrene and 0.8 to 1.0 part of ammonium persulfate according to the parts by weight.
5. The composite cable coating of claim 1, wherein: the raw materials also comprise 5-8 parts of p-hydroxyanisole by weight.
6. The composite cable coating of claim 1, wherein: the cross-linking agent is succinic anhydride.
7. The method of claim 1, comprising the steps of: stirring and uniformly mixing diethyl tartrate, melamine formaldehyde resin, triethanolamine and a cross-linking agent, heating to 90-100 ℃, stirring and reacting for 1.5-2h, adding coarse whiting and talcum powder, stirring for 3-5min, cooling to room temperature to prepare a composite coating, coating the composite coating on the outer side of a cable, and drying at room temperature to prepare the composite cable coating.
8. The method of claim 7 for preparing a composite cable coating, wherein: stirring 5-8 parts of diethyl tartrate and 5-8 parts of p-hydroxyanisole at 40-50 ℃ for reaction for 20-30min to obtain a product I;
introducing nitrogen, heating to 50-60 ℃, uniformly stirring and mixing 6-8 parts of palm oil, 5-8 parts of polystyrene and 0.8-1.0 part of ammonium persulfate, and reacting for 2-3 hours under the protection of nitrogen to obtain a second product;
and uniformly stirring and mixing the rest diethyl tartrate, 20-30 parts of melamine formaldehyde resin, 6-10 parts of triethanolamine and 0.8-1.2 parts of cross-linking agent, heating to 90-100 ℃, stirring and reacting for 1.5-2h, then adding 10-15 parts of 2- (4-chlorophenoxy) -1-chloroethane and 2-5 parts of sodium hydroxide, stirring and reacting for 40-50min, then adding the product I and the product II, stirring for 4-10min, finally adding coarse whiting and talcum powder, stirring for 3-5min, cooling to room temperature to obtain a composite coating, coating the composite coating on the outer side of the cable, and drying at room temperature to obtain the composite cable coating.
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