阅读说明：本技术 一种磁性材料胶黏剂 (Magnetic material adhesive ) 是由 王虹 李成果 董津 张朝纯 张林杰 李娟� 崔瑞杰 赵锐 于 2021-07-21 设计创作，主要内容包括：本发明涉及胶黏剂技术领域,具体公开一种磁性材料胶黏剂。所述胶黏剂按质量百分比计,包括如下组分：主成分：94％～97％,增塑剂2％～4％,增强剂0.2％～0.8％和稳定剂0.5％～1.4％,其中,所述主成分经特定比例、特定组分的α-氰基丙烯酸酯单体复配得到。本申请制备胶黏剂的粘结强度高,在磁材切割或打磨过程中不会出现散料的情况,并满足磁材机加工所需的剪切强度和耐冲击强度的要求,同时在煮胶过程中易开胶,煮胶时间短,也没有碱煮后的印记,提高了磁材的成品率,降低了生产成本,具有广阔的应用前景。(The invention relates to the technical field of adhesives, and particularly discloses a magnetic material adhesive. The adhesive comprises the following components in percentage by mass: the main components are as follows: 94-97 percent of plasticizer, 2-4 percent of plasticizer, 0.2-0.8 percent of reinforcing agent and 0.5-1.4 percent of stabilizer, wherein the main component is obtained by compounding alpha-cyanoacrylate monomers with specific components in a specific proportion. The adhesive is high in bonding strength, the condition of bulk materials cannot occur in the process of cutting or polishing the magnetic materials, the requirements of the shearing strength and the impact strength resistance required by machining the magnetic materials are met, meanwhile, the adhesive is easy to open in the process of boiling the adhesive, the adhesive boiling time is short, no mark is left after alkaline boiling, the yield of the magnetic materials is improved, the production cost is reduced, and the adhesive has a wide application prospect.)

1. The magnetic material adhesive is characterized in that: the adhesive comprises the following components in percentage by mass: the main components are as follows: 94 to 97 percent of plasticizer, 2 to 4 percent of plasticizer, 0.2 to 0.8 percent of reinforcing agent and 0.5 to 1.4 percent of stabilizer; the main components are a mixture of alpha-ethyl cyanoacrylate and alpha-methoxyethyl cyanoacrylate in a mass ratio of 1-5: 1, a mixture of alpha-ethyl cyanoacrylate and alpha-n-hexyl cyanoacrylate in a mass ratio of 1-2: 1, a mixture of alpha-ethyl cyanoacrylate and alpha-sec-octyl cyanoacrylate in a mass ratio of 5-9: 1, a mixture of alpha-butyl cyanoacrylate and alpha-methoxyethyl cyanoacrylate in a mass ratio of 3-9: 1, a mixture of alpha-butyl cyanoacrylate and alpha-n-hexyl cyanoacrylate in a mass ratio of 2-3: 1 or a mixture of alpha-butyl cyanoacrylate and alpha-sec-octyl cyanoacrylate in a mass ratio of 15-20: 1.

2. The magnetic material adhesive according to claim 1, wherein: the stabilizing agent comprises an anionic stabilizing agent and a free radical stabilizing agent, wherein the content of the anionic stabilizing agent is 0.5-1.1% and the content of the free radical stabilizing agent is 0.03-0.3% in percentage by mass of the adhesive.

3. The magnetic material adhesive according to claim 2, wherein: the anion stabilizer is a mixture of propionic acid and sulfur dioxide, wherein the propionic acid accounts for 0.49-1% of the adhesive by mass percent, and the sulfur dioxide accounts for 0.001-0.005% of the adhesive by mass percent.

4. The magnetic material adhesive according to claim 2, wherein: the anionic stabilizer is a mixture of propionic acid and a boron trifluoride-diethyl ether complex, wherein the content of the propionic acid is 0.49-1% and the content of the boron trifluoride-diethyl ether complex is 0.001-0.005% in percentage by mass of the adhesive.

5. The magnetic material adhesive according to claim 2, wherein: the anion stabilizer is a mixture of propionic acid, sulfur dioxide and a boron trifluoride-diethyl etherate complex, wherein the content of the propionic acid is 0.49-1% by mass percent of the adhesive, and the content of the sulfur dioxide and the boron trifluoride-diethyl etherate complex is 0.001-0.005% by mass percent.

6. The magnetic material adhesive according to claim 2, wherein: the free radical stabilizer is at least one of hydroquinone or p-methoxyphenol.

7. The magnetic material adhesive according to claim 1, wherein: the reinforcing agent is a mixture of pyrogallic acid and phthalic anhydride in a mass ratio of 1-1.5: 2-2.5.

8. The magnetic material adhesive according to claim 1, wherein: the plasticizer is diallyl phthalate.

Technical Field

The invention relates to the technical field of adhesives, in particular to a magnetic material adhesive.

Background

Ndfeb magnets, which are now the second most permanent magnets to absolute zero holmium magnets, are also the most commonly used rare-earth magnets, and are widely used in electronic products, such as hard disks, mobile phones, earphones, and battery-powered tools. The neodymium iron boron magnetic material generally adopts the following processing method: electric spark cutting, inner circle slicer processing, trepanning machine processing or multi-line cutting and the like. The magnetic material block needs to be fixed by an adhesive in the machining process, the common adhesive is 502 glue which is mainly compounded by an alpha-ethyl cyanoacrylate monomer and a modifier, and the magnetic material block can be quickly positioned in the magnetic material bonding process to achieve higher mechanical strength.

After the 502 glue is solidified, the softening point of the glue layer is higher and can reach more than 120 ℃, after machining and forming, the 502 glue in the magnetic material gap needs to be melted, and the following melting method is generally adopted:

the method comprises the following steps: the magnetic material with glue is put into boiling alkali liquor to be boiled, so that 502 glue is melted, but the alkali boiling time is long, so that surface materials are corroded, and the quality of the magnetic material and the effect of further electroplating are influenced.

The second method comprises the following steps: the magnetic material blocks are baked by an electric furnace or a coal furnace, and then the 502 glue is melted by boiling alkaline water, but the baking time and the baking temperature are not controllable, and the metallographic structure of the magnetic material itself is changed when the temperature is too high or the time is too long, so that the performance of the magnetic material is influenced.

Therefore, in order to avoid the influence on the quality and performance of the magnetic material in the glue melting process, improve the yield of the magnetic material and reduce the production cost, it is important to research an adhesive which not only has excellent bonding strength, but also is easy to glue in the glue boiling process and does not damage the performance of the magnetic material.

Disclosure of Invention

In view of this, the application provides a magnetic material adhesive, not only has excellent bonding strength, still possesses the characteristic of easily opening the glue, guarantees that the quality and the performance of magnetic material are not influenced in the melten gel process.

In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:

the magnetic material adhesive comprises the following components in percentage by mass: the main components are as follows: 94 to 97 percent of plasticizer, 2 to 4 percent of plasticizer, 0.2 to 0.8 percent of reinforcing agent and 0.5 to 1.4 percent of stabilizer, the main components are a mixture of alpha-ethyl cyanoacrylate and alpha-methoxyethyl cyanoacrylate in a mass ratio of 1-5: 1, a mixture of alpha-ethyl cyanoacrylate and alpha-n-hexyl cyanoacrylate in a mass ratio of 1-2: 1, a mixture of alpha-ethyl cyanoacrylate and alpha-sec-octyl cyanoacrylate in a mass ratio of 5-9: 1, a mixture of alpha-butyl cyanoacrylate and alpha-methoxyethyl cyanoacrylate in a mass ratio of 3-9: 1, a mixture of alpha-butyl cyanoacrylate and alpha-n-hexyl cyanoacrylate in a mass ratio of 2-3: 1 or a mixture of alpha-butyl cyanoacrylate and alpha-sec-octyl cyanoacrylate in a mass ratio of 15-20: 1.

Compared with the prior art, the magnetic material adhesive provided by the application has the following advantages:

according to the adhesive, the alpha-cyanoacrylate monomers with specific proportions and specific components are selected to be compounded to serve as the base material of the adhesive, so that the softening temperature of the adhesive is 85-105 ℃, the high bonding strength of the adhesive is ensured, the condition of bulk materials cannot occur in the process of cutting or polishing the magnetic material, the requirements of shear strength and impact strength required by magnetic material machining are met, meanwhile, the adhesive is easy to open in the process of glue boiling, the glue boiling time is short, and no mark is generated after alkaline boiling, the yield of the magnetic material is improved, the production cost is reduced, and the adhesive has a wide application prospect.

Preferably, the stabilizer comprises an anionic stabilizer and a free radical stabilizer, wherein the anionic stabilizer accounts for 0.5-1.1% of the mass of the adhesive, and the free radical stabilizer accounts for 0.03-0.3%.

Preferably, the anionic stabilizer is a mixture of propionic acid and sulfur dioxide, wherein the propionic acid accounts for 0.49-1% of the mass of the adhesive, and the sulfur dioxide accounts for 0.001-0.005%.

Preferably, the anionic stabilizer is a mixture of propionic acid and a boron trifluoride-diethyl etherate complex, wherein the content of propionic acid is 0.49-1% and the content of boron trifluoride-diethyl etherate complex is 0.001-0.005% by mass of the adhesive.

Preferably, the anionic stabilizer is a mixture of propionic acid, sulfur dioxide and a boron trifluoride-diethyl ether complex, wherein the content of the propionic acid is 0.49-1% by mass of the adhesive, and the content of the sulfur dioxide and the boron trifluoride-diethyl ether complex is 0.001-0.005% by mass of the adhesive.

The preferable stabilizer improves the stability of the adhesive under light and heat conditions.

The optimized propionic acid can effectively prolong the shelf life of the adhesive in an alkaline environment.

Preferably, the radical stabilizer is at least one of hydroquinone or p-methoxyphenol.

Preferably, the reinforcing agent is a mixture of pyrogallic acid and phthalic anhydride in a mass ratio of 1-1.5: 2-2.5.

The optimized reinforcing agent not only increases the bonding strength and the anti-seismic performance of the magnetic material, but also improves the water resistance and the oil resistance of the magnetic material in the machining process, so that the prepared adhesive has excellent bonding property, is free from material scattering and also has excellent strength in the machining process.

Preferably, the plasticizer is diallyl phthalate.

The optimized plasticizer reduces intermolecular force among the components in the raw materials, promotes fusion among the components, improves brittleness of the adhesive, and can be used as an internal crosslinking agent to improve strength of the adhesive.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

The embodiment provides a magnetic material adhesive, which comprises the following components: 480g of alpha-ethyl cyanoacrylate, 480g of methoxyethyl cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2g of phthalic anhydride, 4.97g of propionic acid, and SO₂: 0.03g and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 2

The embodiment provides a magnetic material adhesive, which comprises the following components: 718g of ethyl α -cyanoacrylate, 240.46g of methoxyethyl α -cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2.5g of phthalic anhydride, 6g of propionic acid, boron trifluoride-diethyl ether complex: 0.04g and p-methoxyphenol 2 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 3

The embodiment provides a magnetic material adhesive, which comprises the following components: 480g of alpha-ethyl cyanoacrylate, 480g of n-hexyl cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2g of phthalic anhydride, 4.97g of propionic acid, SO 2: 0.03g and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 4

The embodiment provides a magnetic material adhesive, which comprises the following components: 864.9g of ethyl alpha-cyanoacrylate, 96.1g of sec-octyl alpha-cyanoacrylate, 25g of diallyl phthalate, 1.5g of pyrogallic acid, 2.5g of phthalic anhydride, 7.99g of propionic acid, boron trifluoride-diethyl ether complex: 0.01g, and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 5

The embodiment provides a magnetic material adhesive, which comprises the following components: 718g of butyl α -cyanoacrylate, 240.46g of methoxyethyl α -cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2.5g of phthalic anhydride, 6g of propionic acid, boron trifluoride-diethyl ether complex: 0.04g and p-methoxyphenol 2 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 6

The embodiment provides a magnetic material adhesive, which comprises the following components: 864.9g of alpha-butyl cyanoacrylate, 96.1g of methoxyethyl alpha-cyanoacrylate, 25g of diallyl phthalate, 1.5g of pyrogallic acid, 2.5g of phthalic anhydride, 7.99g of propionic acid, boron trifluoride-diethyl ether complex: 0.01g, and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 7

The embodiment provides a magnetic material adhesive, which comprises the following components: 718g of butyl α -cyanoacrylate, 240.46g of n-hexyl α -cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2.5g of phthalic anhydride, 6g of propionic acid, boron trifluoride-diethyl ether complex: 0.04g and p-methoxyphenol 2 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 8

The embodiment provides a magnetic material adhesive, which comprises the following components: 908.46g of alpha-butyl cyanoacrylate, 50g of alpha-sec-octyl cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2.5g of phthalic anhydride, 6g of propionic acid, boron trifluoride-diethyl ether complex: 0.04g and p-methoxyphenol 2 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 9

The embodiment provides a magnetic material adhesive, which comprises the following components: 783.35g of alpha-ethyl cyanoacrylate, 156.65g of methoxyethyl alpha-cyanoacrylate, 40g of diallyl phthalate, 2.58g of pyrogallic acid, 3.42g of phthalic anhydride, 10g of propionic acid, and SO₂: 0.05g, boron trifluoride-diethyl ether complex 0.05g and hydroquinone 3 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 10

The embodiment provides a magnetic material adhesive, which comprises the following components: 646.7g of alpha-ethyl cyanoacrylate, 323.3g of n-hexyl alpha-cyanoacrylate, 20g of diallyl phthalate, 1.56g of pyrogallic acid, 3.14g of phthalic anhydride, 4.99g of propionic acid and SO₂: 0.01g and hydroquinone 0.3 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 11

The embodiment provides a magnetic material adhesive, which comprises the following components: 791.7g of alpha-ethyl cyanoacrylate, 158.3g of alpha-sec-octyl cyanoacrylate, 30.7g of diallyl phthalate, 3g of pyrogallic acid, 5g of phthalic anhydride, 10g of propionic acid and SO₂: 0.05g, boron trifluoride-diethyl ether complex 0.05g, and hydroquinone 0.3 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 12

The embodiment provides a magnetic material adhesive, which comprises the following components: 640g of alpha-butyl cyanoacrylate, 320g of alpha-n-hexyl cyanoacrylate, 26g of diallyl phthalate, 2g of pyrogallic acid, 4g of phthalic anhydride, 10g of propionic acid, 4.99g of propionic acid, 0.01g of boron trifluoride-diethyl ether complex and 3g of hydroquinone.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Example 13

The embodiment provides a magnetic material adhesive, which comprises the following components: 900g of butyl cyanoacrylate, 60g of sec-octyl alpha-cyanoacrylate, 26g of diallyl phthalate, 2g of pyrogallic acid, 4g of phthalic anhydride, 10g of propionic acid, 4.97g of propionic acid, 0.03g of boron trifluoride-diethyl ether complex and 3g of hydroquinone.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

In order to better illustrate the technical solution of the present invention, further comparison is made below by means of a comparative example and an example of the present invention.

Comparative example 1

The comparative example provides a magnetic material adhesive, which comprises the following components: 862.61g of alpha-ethyl cyanoacrylate, 95.85g of methoxyethyl alpha-cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2.5g of phthalic anhydride, 6g of propionic acid, boron trifluoride-diethyl ether complex: 0.04g and p-methoxyphenol 2 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

The mass ratio of the alpha-ethyl cyanoacrylate to the alpha-methoxyethyl cyanoacrylate was 9: 1.

Comparative example 2

The comparative example provides a magnetic material adhesive, which comprises the following components: 720g of alpha-ethyl cyanoacrylate, 240g of n-hexyl alpha-cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2g of phthalic anhydride, 4.97g of propionic acid, SO 2: 0.03g and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

The mass ratio of the alpha-ethyl cyanoacrylate to the alpha-n-hexyl cyanoacrylate is 3: 1.

Comparative example 3

The comparative example provides a magnetic material adhesive, which comprises the following components: 720.75g of ethyl alpha-cyanoacrylate, 240.25g of sec-octyl alpha-cyanoacrylate, 25g of diallyl phthalate, 1.5g of pyrogallic acid, 2.5g of phthalic anhydride, 7.99g of propionic acid, boron trifluoride-diethyl ether complex: 0.01g, and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

The mass ratio of the alpha-ethyl cyanoacrylate to the alpha-sec-octyl cyanoacrylate is 3: 1.

Comparative example 4

The comparative example provides a magnetic material adhesive, which comprises the following components: 479.23g of alpha-butyl cyanoacrylate, 479.23g of methoxyethyl alpha-cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2.5g of phthalic anhydride, 6g of propionic acid, boron trifluoride-diethyl ether complex: 0.04g and p-methoxyphenol 2 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

The mass ratio of the alpha-butyl cyanoacrylate to the alpha-methoxyethyl cyanoacrylate is 1: 1.

Comparative example 5

The comparative example provides a magnetic material adhesive, which comprises the following components: 479.23g of alpha-butyl cyanoacrylate, 479.23g of n-hexyl alpha-cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2.5g of phthalic anhydride, 6g of propionic acid, boron trifluoride-diethyl ether complex: 0.04g and p-methoxyphenol 2 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

The mass ratio of the alpha-butyl cyanoacrylate to the alpha-n-hexyl cyanoacrylate is 1: 1.

Comparative example 6

The comparative example provides a magnetic material adhesive, which comprises the following components: 862.61g of butyl α -cyanoacrylate, 95.85g of sec-octyl α -cyanoacrylate, 30g of diallyl phthalate, 1g of pyrogallic acid, 2.5g of phthalic anhydride, 6g of propionic acid, boron trifluoride-diethyl ether complex: 0.04g and p-methoxyphenol 2 g.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

The mass ratio of the alpha-butyl cyanoacrylate to the alpha-sec-octyl cyanoacrylate is 9: 1.

Comparative example 7

The comparative example provides a magnetic material adhesive, which comprises the following components: 961g of ethyl α -cyanoacrylate, 25g of diallyl phthalate, 1.5g of pyrogallic acid, 2.5g of phthalic anhydride, 7.99g of propionic acid, boron trifluoride-diethyl ether complex: 0.01g, and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Comparative example 8

The comparative example provides a magnetic material adhesive, which comprises the following components: 961g of butyl α -cyanoacrylate, 25g of diallyl phthalate, 1.5g of pyrogallic acid, 2.5g of phthalic anhydride, 7.99g of propionic acid, boron trifluoride-diethyl ether complex: 0.01g, and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Comparative example 9

The comparative example provides a magnetic material adhesive, which comprises the following components: 961g of methoxyethyl α -cyanoacrylate, 25g of diallyl phthalate, 1.5g of pyrogallic acid, 2.5g of phthalic anhydride, 7.99g of propionic acid, boron trifluoride-diethyl ether complex: 0.01g, and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

Comparative example 10

The comparative example provides a magnetic material adhesive, which comprises the following components: 961g of n-hexyl α -cyanoacrylate, 25g of diallyl phthalate, 1.5g of pyrogallic acid, 2.5g of phthalic anhydride, 7.99g of propionic acid, boron trifluoride-diethyl ether complex: 0.01g, and 2g of p-methoxyphenol.

And mixing and stirring the components uniformly to obtain the magnetic material adhesive.

The adhesives prepared in examples 1-13 and comparative examples 1-10 were tested for performance.

Boiling the solution: the adhesives prepared in examples 1 to 13 and comparative examples 1 to 10 were respectively bonded with magnetic materials of the same size and shape, then boiled with NaOH solutions of 3 wt% and 5 wt% respectively, and the glue opening time and the imprinting condition on the magnetic material surface were recorded, and the specific results are shown in table 1.

Shear strength: according to GB/T7124-; the earthquake-resistant times are as follows: testing the anti-seismic times of the stainless steel plate after 24h bonding according to the size of the stainless steel plate specified in GB/T7124-2008, and specifically operating: the stainless steel plate is horizontally placed, freely falls to the cement ground from a height of 1m, and the times of glue failure after falling are recorded; and comprehensively examining the bulk cargo condition in the machining process after sizing, and the detection results are shown in table 2.

TABLE 1 test results

Note: after alkaline cooking, marks are marked to indicate that the surface of the magnetic material is corroded.

TABLE 2 test results

As can be seen from the data in tables 1 and 2, the alpha-cyanoacrylate monomer with a specific proportion and a specific component with a softening point higher than 100 ℃ and the alpha-cyanoacrylate monomer with a softening point lower than or equal to 100 ℃ are selected for compounding, so that the prepared adhesive has excellent bonding performance, the shear strength of the carbon steel plate for 2h and 24h reaches 13.6MPa and 20.1MPa, no bulk material exists in the processing process, the glue is easy to open in the glue boiling process, the glue boiling time is short, no mark is left after alkaline boiling, the yield of the magnetic material is improved, and the production cost is reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.