Metal nickel suspension and preparation method thereof, coating and adhesive tape

Abstract

The invention provides a metallic nickel suspension and a preparation method thereof, a coating and an adhesive tape, and relates to the technical field of nickel suspensions. The metal nickel suspension liquid is prepared from the following raw materials in parts by weight: 100 parts of acrylate, 8 to 20 parts of nickel powder, 0.5 to 1 part of carboxyl aromatic acid compound and 0.5 to 1 part of halogenated alkyl bromide. A carboxyl aromatic acid compound and halogenated alkyl bromide (organic halide) are subjected to an electrophilic cross-coupling reaction under the action of nickel to prepare amphoteric macromolecules, an electrophilic group extends to a metal nickel phase, an electron donating group extends to an acrylate solution, so that the surface tension of nickel powder is reduced, and meanwhile, different micelles are kept relatively stable and independent; and the nickel powder can be integrally dispersed to form fine particle liquid drops, so that the nickel powder is stably suspended in the acrylate solution.

Description

Technical Field

[0001] The present application relates to the technical field of nickel suspensions, and in particular to a metal nickel suspension and a preparation method thereof, a coating and an adhesive tape. Background Art

[0002] With the rapid development of science and technology, various devices have changed from ordinary brakes to more intelligent ones. Simple mobile phones are screen interactive, and cars are gradually becoming more screen interactive. Circuit modules are becoming more and more commonly used, and the demand for various technologies in conductivity and shielding is also increasing. Simply reducing impedance can directly affect energy conservation and emission reduction, control costs, and reduce weight and size.

[0003] At present, most conductive products rely on adding metal nickel fillers. On the one hand, the density difference is that the density of ordinary resin is 0.9-1.4g / cm 3 , nickel powder density 7-10g / cm 3 , still flocculation occurs under the action of gravity. On the other hand, the mutual force between powders can easily cause agglomeration, resulting in uneven dispersion, reduced local conductivity, and serious direct unusability.

[0004] Therefore, how to solve the above problems and provide a new metal suspension is an issue that needs to be addressed urgently. Summary of the invention

[0005] The purpose of the present application is to provide a metallic nickel suspension and a preparation method thereof, a coating and an adhesive tape to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present application provides a first aspect of a metallic nickel suspension, wherein the raw materials thereof, measured by weight, include:

[0007] 100 parts of acrylate, 8 parts to 20 parts of nickel powder, 0.5 parts to 1 parts of carboxyl aromatic acid compounds, and 0.5 parts to 1 parts of halogenated alkyl bromides.

[0008] Optionally, the metallic nickel suspension satisfies at least one of the following conditions:

[0009] A. the nickel powder comprises modified nickel powder treated with a phenyl silane coupling agent;

[0010] B. the nickel powder comprises pure metallic nickel and / or nickel-coated graphite;

[0011] C. The particle size of the nickel powder is less than or equal to 100 um.

[0012] Optionally, the phenylsilane coupling agent includes one or more of phenyltrimethoxysilane, phenyltriethoxysilane, diphenyldimethoxysilane, and methylphenyldimethoxysilane.

[0013] Optionally, the metallic nickel suspension satisfies at least one of the following conditions:

[0014] A. The chemical formula of the acrylate is CH2=CR1COOR2;

[0015] Wherein, R1 includes hydrogen or alkyl, and R2 includes -(CH2) m -H, m is a positive integer from 1 to 5;

[0016] The number of carbon atoms of the alkyl group is less than or equal to 4;

[0017] B. The molecular weight of the acrylic acid ester is 86-198.

[0018] Optionally, the metallic nickel suspension satisfies at least one of the following conditions:

[0019] A. The chemical formula of the carboxyl aromatic acid compound is: H-(CH2) n -C6H6-COOH;

[0020] Wherein, n is a positive integer from 4 to 9;

[0021] B. The molecular weight of the acrylic acid ester is 180-250.

[0022] Optionally, the chemical formula of the halogenated alkyl bromide is: H-(CH2) y -Br;

[0023] Wherein, y is a positive integer from 4 to 9.

[0024] The second aspect of the present application provides a method for preparing the metallic nickel suspension, comprising:

[0025] The nickel powder and the carboxyl aromatic acid compound are first mixed and heated to obtain a mixture;

[0026] The mixture, acrylate and halogenated alkyl bromide are mixed for a second time to obtain a metallic nickel suspension.

[0027] Optionally, the method for preparing the metallic nickel suspension satisfies at least one of the following conditions:

[0028] A. The heating temperature is 80°C-100°C and the heating time is 2h-4h;

[0029] B. before performing the second mixing, sieving the mixture;

[0030] C. performing vacuum degassing after performing the second mixing;

[0031] The pressure of the vacuum degassing is minus 0.1 MPa to minus 0.08 MPa.

[0032] The third aspect of the present application provides a coating, comprising the metal nickel suspension or the metal nickel suspension prepared by the method for preparing the metal nickel suspension.

[0033] A fourth aspect of the present application provides an adhesive tape, comprising the metal nickel suspension or the metal nickel suspension prepared by the method for preparing the metal nickel suspension.

[0034] Compared with the prior art, the beneficial effects of this application include:

[0035] The metal nickel suspension provided in the present application, carboxyl aromatic acid compounds and halogenated alkyl bromides (organic halides) undergo electrophilic cross-coupling reaction under the action of nickel to produce amphiphilic macromolecules, in which the electrophilic groups extend toward the metal nickel phase and the electron-donating groups extend toward the acrylate solution, thereby reducing the surface tension of the nickel powder. At the same time, different micelles remain relatively stable and independent, which is conducive to overall dispersion to form fine particle droplets, thereby allowing the nickel powder to be stably suspended in the acrylate solution.

[0036] The preparation method of the metallic nickel suspension provided in the present application comprises the following steps: first, nickel powder and carboxyl aromatic acid compounds are uniformly mixed, and then the nickel chelate formed by heating is further reacted with a haloalkyl bromide. During the whole process, the carboxyl aromatic acid compound and the haloalkyl bromide undergo an electrophilic cross-coupling reaction to obtain an amphoteric macromolecule, wherein the nickel is finally reduced to elemental nickel to act as a catalyst. In addition to not introducing new catalyst impurities, the preparation method can also circumvent the problems caused by the ketone compounds prepared by the traditional Weinreb ketone synthesis strategy, avoid the volatilization, residue, and reduced adhesion of such monomers in the later use, and the preparation method has a simple process, a short production cycle, and high production efficiency, and can be used for large-scale production.

[0037] In the coating and adhesive tape provided by the present application, the metal nickel powder is not easy to agglomerate. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope of the present application.

[0039] Figure 1 A schematic diagram of nickel distribution in a metallic nickel suspension provided in this application;

[0040] Figure 2 A physical picture of the 72h precipitation test of the metallic nickel suspension provided in Example 1;

[0041] Figure 3A physical picture of the 72h precipitation test of the metallic nickel suspension provided in Example 2;

[0042] Figure 4 A physical picture of the 72h precipitation test of the metallic nickel suspension provided in Example 3;

[0043] Figure 5 A physical picture of the 72h precipitation test of the metallic nickel suspension provided in Comparative Example 1;

[0044] Figure 6 A physical picture of the 72h precipitation test of the metallic nickel suspension provided in Comparative Example 2;

[0045] Figure 7 A physical picture of the 72h precipitation test of the metallic nickel suspension provided in Comparative Example 3;

[0046] Figure 8 A physical picture of the 72h precipitation test of the metallic nickel suspension provided in Comparative Example 4;

[0047] Fig. 9 A physical picture of the 72h precipitation test of the metallic nickel suspension provided in Comparative Example 5;

[0048] Fig.10 A microscopic examination image of the metallic nickel suspension provided in Example 1;

[0049] Fig.11 A microscopic examination image of the metallic nickel suspension provided in Example 2;

[0050] Fig.12 A microscopic examination image of the metallic nickel suspension provided in Comparative Example 1;

[0051] Fig.13 A microscopic examination image of the metallic nickel suspension provided for Comparative Example 2;

[0052] Fig.14 A microscopic examination image of the metallic nickel suspension provided for Comparative Example 3;

[0053] Fig.15 A microscopic examination image of the metallic nickel suspension provided for Comparative Example 4;

[0054] Fig.16 This is a microscopic examination image of the metallic nickel suspension provided for Comparative Example 5. DETAILED DESCRIPTION

[0055] As used herein:

[0056] "Prepared from" is synonymous with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0057] The conjunction "consisting of excludes any unspecified element, step, or component. If used in a claim, this phrase renders the claim closed-ended so that it does not include materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause of the body of a claim rather than immediately following the subject matter, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0058] When an amount, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted as including ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described in this article, unless otherwise stated, the range is intended to include its end values ​​and all integers and fractions within the range.

[0059] In these examples, parts and percentages are by mass unless otherwise indicated.

[0060] "Parts by mass" refers to the basic unit of measurement for expressing the mass ratio of multiple components. 1 part can represent any unit mass, such as 1g or 2.689g. If we say that the mass of component A is a parts and the mass of component B is b parts, it means the ratio of the mass of component A to the mass of component B is a:b. Alternatively, it means that the mass of component A is aK and the mass of component B is bK (K is an arbitrary number, indicating a multiple factor). It should not be misunderstood that, unlike the mass parts, the sum of the mass of all components is not limited to 100 parts.

[0061] "And / or" is used to indicate that one or both of the stated situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0062] The first aspect of the present application provides a metallic nickel suspension, wherein the raw materials thereof, measured by weight, include:

[0063] 100 parts of acrylate, 8 parts to 20 parts of nickel powder, 0.5 parts to 1 parts of carboxyl aromatic acid compounds, and 0.5 parts to 1 parts of halogenated alkyl bromides.

[0064] Optionally, the raw materials of the metallic nickel suspension are measured by weight: acrylate is 100 parts, nickel powder can be 8 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts or any value between 8 parts and 20 parts, the carboxyl aromatic acid compound can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part or any value between 0.5 parts and 1 part, and the halogenated alkyl bromide can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part or any value between 0.5 parts and 1 part.

[0065] In some embodiments, the metallic nickel suspension satisfies at least one of the following conditions:

[0066] A. the nickel powder comprises modified nickel powder treated with a phenyl silane coupling agent;

[0067] It should be noted that the modified nickel powder treated with phenylsilane coupling agent, in which the phenylsilane coupling agent participates in the entire reaction process as a promoter, improves the encapsulation and dispersibility of the nickel powder;

[0068] B. the nickel powder comprises pure metallic nickel and / or nickel-coated graphite;

[0069] In some embodiments, the nickel powder is pure metallic nickel;

[0070] In some embodiments, the nickel powder is nickel-coated graphite;

[0071] In some embodiments, the nickel powder is a mixture of pure metallic nickel and nickel-coated graphite. Preferably, when the mass ratio of pure metallic nickel to nickel-coated graphite is 1:0.5, the effective component of the entire suspension, i.e., the conductivity is optimal;

[0072] C. The particle size of the nickel powder is less than or equal to 100 um.

[0073] Optionally, the particle size of the nickel powder can be 1um, 10um, 20um, 40um, 60um, 80um, 100um or any value less than or equal to 100um.

[0074] It should be noted that when the particle size of nickel powder is less than or equal to 100um, the specific surface area is relatively large to achieve a stable suspension effect.

[0075] In some embodiments, the phenylsilane coupling agent includes one or more of phenyltrimethoxysilane, phenyltriethoxysilane, diphenyldimethoxysilane, and methylphenyldimethoxysilane.

[0076] In some embodiments, the metallic nickel suspension satisfies at least one of the following conditions:

[0077] A. The chemical formula of the acrylate is CH2=CR1COOR2;

[0078] Wherein, R1 includes hydrogen or alkyl, and R2 includes -(CH2) m -H, m is a positive integer from 1 to 5;

[0079] Optionally, m can be 1, 2, 3, 4, 5 or any positive integer between 1 and 5;

[0080] The number of carbon atoms of the alkyl group is less than or equal to 4;

[0081] Optionally, the number of carbon atoms in the alkyl group may be 1, 2, 3, 4, or any positive integer less than or equal to 4;

[0082] B. The molecular weight of the acrylic acid ester is 86-198.

[0083] In some embodiments, the metallic nickel suspension satisfies at least one of the following conditions:

[0084] A. The chemical formula of the carboxyl aromatic acid compound is: H-(CH2) n -C6H6-COOH;

[0085] Wherein, n is a positive integer from 4 to 9;

[0086] Optionally, n can be 4, 5, 6, 7, 8, 9 or any positive integer between 4 and 9;

[0087] In some optional embodiments, the carboxyl aromatic acid compound refers to an aromatic acid compound, that is, a benzoic acid group obtained by directly connecting a carboxyl group to a benzene ring. Exemplarily, the carboxyl aromatic acid compound includes but is not limited to one or more of CH3(CH2)4-C6H6-COOH, CH3(CH2)5-C6H6-COOH, CH3(CH2)6-C6H6-COOH, CH3(CH2)7-C6H6-COOH, CH3(CH2)8-C6H6-COOH, and CH3(CH2)9-C6H6-COOH;

[0088] B. The molecular weight of the carboxyl aromatic acid compound is 180-250.

[0089] In some embodiments, the chemical formula of the haloalkyl bromide is: H-(CH2) y -Br;

[0090] Wherein, y is a positive integer from 4 to 9.

[0091] Optionally, y can be 4, 5, 6, 7, 8, 9 or any positive integer between 4 and 9.

[0092] In some optional embodiments, the halogenated alkyl bromide includes but is not limited to one or more of CH3(CH2)4-Br, CH3(CH2)5-Br, CH3(CH2)6-Br, CH3(CH2)7-Br, CH3(CH2)8-Br, and CH3(CH2)9-Br.

[0093] The second aspect of the present application provides a method for preparing the metallic nickel suspension, comprising:

[0094] The nickel powder and the carboxyl aromatic acid compound are first mixed and heated to obtain a mixture;

[0095] The mixture, acrylate and halogenated alkyl bromide are mixed for a second time to obtain a metallic nickel suspension.

[0096] It should be noted that if Figure 1 As shown in the left figure, when nickel powder is only in the solvent, the nickel powder will agglomerate in large quantities. Figure 1 As shown in the figure on the right, after nickel powder and carboxyl aromatic acid compounds are evenly mixed, the nickel chelate formed by heating is further reacted with halogenated alkyl bromide. During the whole process, the carboxyl aromatic acid compound and the halogenated alkyl bromide undergo electrophilic cross-coupling reaction to produce amphiphilic macromolecules, thereby allowing the nickel powder to be stably suspended in the acrylate solution.

[0097] In some embodiments, the method for preparing the metallic nickel suspension satisfies at least one of the following conditions:

[0098] A. The heating temperature is 80°C-100°C and the heating time is 2h-4h;

[0099] Optionally, the heating temperature may be 80°C, 90°C, 100°C or any value between 80°C and 100°C, and the heating time may be 2h, 3h, 4h or any value between 2h and 4h;

[0100] B. before performing the second mixing, sieving the mixture;

[0101] C. performing vacuum degassing after performing the second mixing;

[0102] The pressure of the vacuum degassing is minus 0.1 MPa to minus 0.08 MPa.

[0103] Optionally, the pressure of vacuum degassing can be negative 0.1 MPa, negative 0.09 MPa, negative 0.08 MPa, or any value between negative 0.1 MPa and negative 0.08 MPa.

[0104] The third aspect of the present application provides a coating, comprising the metal nickel suspension or the metal nickel suspension prepared by the method for preparing the metal nickel suspension.

[0105] In some optional embodiments, applications of the coating include but are not limited to electromagnetic shielding, anti-static, and electrical conductivity.

[0106] A fourth aspect of the present application provides an adhesive tape, comprising the metal nickel suspension or the metal nickel suspension prepared by the method for preparing the metal nickel suspension.

[0107] In some optional embodiments, the tape is used for EMI shielding to prevent electromagnetic waves from interfering with electronic devices, and for conductive bonding of flexible printed circuit boards.

[0108] The embodiments of the present application will be described in detail below in conjunction with specific examples, but it will be appreciated by those skilled in the art that the following examples are only used to illustrate the present application and should not be considered as limiting the scope of the present application. If specific conditions are not specified in the examples, they are carried out according to normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0109] Example 1

[0110] In a first aspect, the present embodiment provides a metallic nickel suspension, wherein the raw materials thereof, by weight, include:

[0111] Acrylate 100g, pure nickel powder 15g, carboxyl aromatic acid compound 0.8g, halogenated alkyl bromide 0.8g;

[0112] Wherein, the nickel powder is modified pure metal nickel treated with phenyl silane coupling agent, Dv(50)=25um, Dv(90)=80um;

[0113] The phenylsilane coupling agent is phenyltrimethoxysilane;

[0114] The chemical formula of acrylate is CH2=CCH3COOCH3, where the molecular weight of acrylate is 102;

[0115] Carboxyl aromatic acid compounds are CH3CH2C6H6COOH;

[0116] The haloalkyl bromide is CH3CH2Br.

[0117] A second aspect of the present embodiment provides a method for preparing a metallic nickel suspension, the specific steps comprising:

[0118] S1: Mix nickel powder and carboxyl functionalized aromatic acid, sieve under ultrasonic vibration and 325 mesh sieve, and bake the sieved material in an oven at 80℃ for 2h;

[0119] S2: stirring and mixing the acrylic acid ester and the haloalkyl bromide at a speed of 800 r / min;

[0120] S3: Mix the S1 product and the S2 product, dynamically stir them evenly at a stirring speed of 800-1000 r / min and evacuate them for degassing. The pressure of vacuum degassing is -0.1 MPa--0.08 MPa.

[0121] A third aspect of the present embodiment provides an adhesive tape, comprising the above-mentioned metal nickel suspension. The method for preparing the adhesive tape comprises: applying the above-mentioned metal nickel suspension to the surface of a copper foil by a scraper to form an adhesive tape product.

[0122] Example 2

[0123] The difference from Example 1 is that the nickel powder is 20 g.

[0124] Example 3

[0125] The difference from Example 1 is that the third aspect provides a coating, wherein the raw materials thereof, measured by weight, include:

[0126] 30 parts of metallic nickel suspension and 70 parts of acrylic base coating.

[0127] Comparative Example 1

[0128] The difference from Example 1 is that no carboxyl functionalized aromatic acid is added.

[0129] Comparative Example 2

[0130] The difference from Example 1 is that no halogenated alkyl bromide is added.

[0131] Comparative Example 3

[0132] The difference from Example 1 is that no haloalkyl bromide and carboxyl-functionalized aromatic acid are added.

[0133] Comparative Example 4

[0134] The difference from Example 1 is that the raw materials of the metallic nickel suspension are measured by weight and include:

[0135] 100 parts of acrylate, 50 parts of nickel powder, 5 parts of carboxyl aromatic acid compound, and 5 parts of halogenated alkyl bromide.

[0136] Comparative Example 5

[0137] The difference from Example 1 is that the metal nickel is replaced by iron powder.

[0138] The nickel suspensions prepared in the above examples and comparative examples were subjected to a precipitation test and the precipitation was observed for 72 hours. The precipitation test results of Example 1 for 72 hours were as follows: Figure 2 As shown, the 72h precipitation test results of Example 2 are as follows Figure 3 As shown, the 72h precipitation test results of Example 3 are as follows Figure 4 As shown, the 72h precipitation test results of Comparative Example 1 are as follows Figure 5 As shown, the 72h precipitation test results of Comparative Example 2 are as follows Figure 6 As shown, the 72h precipitation test results of Comparative Example 3 are as follows Figure 7 As shown, the 72h precipitation test results of Comparative Example 4 are as follows Figure 8 As shown, the 72h precipitation test results of Comparative Example 5 are as follows Fig. 9 The specific test results are shown in Table 1.

[0139] Table 1 Placement sedimentation test

[0140]

[0141]

[0142] The nickel metal suspensions prepared in the above examples and comparative examples were also tested under a microscope to observe the uniformity of powder distribution. The microscope test results of Example 1 are as follows: Fig.10 As shown, the microscope test results of Example 2 are as follows Fig.12 As shown, the microscope test results of Comparative Example 1 are as follows Fig.13 As shown, the microscope test results of Comparative Example 2 are as follows Fig.14 As shown, the microscope test results of Comparative Example 3 are as follows Fig.14 As shown, the microscope test results of Comparative Example 4 are as follows Fig.15 As shown, the microscope test results of Comparative Example 5 are as follows Fig.16 shown.

[0143] analyze:

[0144] From the above-mentioned placement precipitation test and microscope observation, it can be seen from Examples 1-3 that the metal nickel suspension prepared in the present application has good stability and uniform dispersion; Comparative Examples 1, 3, and 5 essentially block the progress of the mechanism, so there is a large amount of precipitation; although Comparative Example 2 also has serious defects, it has a slight stability under the initial treatment; Comparative Example 4 exceeds the overall tolerance range.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0146] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the above claims, any one of the claimed embodiments may be used in any combination. The information disclosed in this background technology section is intended only to deepen the understanding of the overall background technology of the present application and should not be regarded as an admission or in any form of implication that the information constitutes prior art known to those skilled in the art.

Claims

1. A metallic nickel suspension, characterized in that: The raw materials include, by weight: 100 parts of acrylate, 8 parts to 20 parts of nickel powder, 0.5 parts to 1 parts of carboxyl aromatic acid compounds, and 0.5 parts to 1 parts of halogenated alkyl bromides.

2. The metallic nickel suspension according to claim 1, characterized in that At least one of the following conditions is met: A. the nickel powder comprises modified nickel powder treated with a phenyl silane coupling agent; B. the nickel powder comprises pure metallic nickel and / or nickel-coated graphite; C. The particle size of the nickel powder is less than or equal to 100 um.

3. The metallic nickel suspension according to claim 2, characterized in that: The phenylsilane coupling agent includes one or more of phenyltrimethoxysilane, phenyltriethoxysilane, diphenyldimethoxysilane, and methylphenyldimethoxysilane.

4. The metallic nickel suspension according to claim 1, characterized in that At least one of the following conditions is met: A. The chemical formula of the acrylate is CH2=CR1COOR2; Wherein, R1 includes hydrogen or alkyl, and R2 includes -(CH2) m -H, m is a positive integer from 1 to 5; The number of carbon atoms of the alkyl group is less than or equal to 4; B. The molecular weight of the acrylic acid ester is 86-198.

5. The metallic nickel suspension according to claim 1, characterized in that: At least one of the following conditions is met: A. The chemical formula of the carboxyl aromatic acid compound is: H-(CH2) n -C6H6-COOH; Wherein, n is a positive integer from 4 to 9; B. The molecular weight of the acrylic acid ester is 180-250.

6. The metallic nickel suspension according to any one of claims 1 to 5, characterized in that: The chemical formula of the haloalkyl bromide is: H-(CH2) y -Br; Wherein, y is a positive integer from 4 to 9.

7. A method for preparing a metallic nickel suspension according to any one of claims 1 to 6, characterized in that: include: The nickel powder and the carboxyl aromatic acid compound are first mixed and heated to obtain a mixture; The mixture, acrylate and halogenated alkyl bromide are mixed for a second time to obtain a metallic nickel suspension.

8. The method for preparing a metallic nickel suspension according to claim 7, characterized in that: At least one of the following conditions is met: A. The heating temperature is 80°C-100°C and the heating time is 2h-4h; B. before performing the second mixing, sieving the mixture; C. performing vacuum degassing after performing the second mixing; The pressure of the vacuum degassing is minus 0.1 MPa to minus 0.08 MPa.

9. A coating, characterized in that: The invention relates to a metallic nickel suspension comprising the metallic nickel suspension according to any one of claims 1 to 6 or a metallic nickel suspension prepared by the method for preparing the metallic nickel suspension according to claim 7 or 8.

10. An adhesive tape, characterized in that: The invention relates to a metallic nickel suspension comprising the metallic nickel suspension according to any one of claims 1 to 6 or a metallic nickel suspension prepared by the method for preparing the metallic nickel suspension according to claim 7 or 8.

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