阅读说明：本技术 一种导磁压敏胶及其制备方法以及导磁胶黏带 (Magnetic conductive pressure-sensitive adhesive, preparation method thereof and magnetic conductive adhesive tape ) 是由 高寒 于 2020-05-27 设计创作，主要内容包括：本发明提供一种导磁压敏胶,包括如下配方的组分：15-30重量份的1,6-己二醇二丙烯酸盐凝胶,20-40重量份的丙烯酸异辛酯、18-36重量份的AA精丙烯酸,10-20重量份的1-羟基环己基苯基酮,10-20重量份的十二硫醇；3-8重量份的磁性粉料,其中1,6-己二醇二丙烯酸盐凝胶的制备方法为：将1,6-己二醇二丙烯酸盐和三乙醇胺重量份数3:1-2的混合溶液中加入过硫酸盐混合均匀,制得1,6-己二醇二丙烯酸盐凝胶。本发明UV光对制备过程进行处理,而非采用加热,加工方式简单,生产更加节能环保,并且制得的压敏胶对高温和低温都有很强的耐候性。(The invention provides a magnetic conductive pressure-sensitive adhesive, which comprises the following components in parts by weight: 15-30 parts of 1, 6-hexanediol diacrylate gel, 20-40 parts of isooctyl acrylate, 18-36 parts of AA refined acrylic acid, 10-20 parts of 1-hydroxycyclohexyl phenyl ketone and 10-20 parts of dodecyl mercaptan; 3-8 parts of magnetic powder, wherein the preparation method of the 1, 6-hexanediol diacrylate gel comprises the following steps: adding persulfate into a mixed solution of 1, 6-hexanediol diacrylate and triethanolamine in a weight ratio of 3:1-2, and uniformly mixing to obtain the 1, 6-hexanediol diacrylate gel. The UV light is used for treating the preparation process instead of heating, the processing mode is simple, the production is more energy-saving and environment-friendly, and the prepared pressure-sensitive adhesive has strong weather resistance to high temperature and low temperature.)

1. A magnetic conductive pressure sensitive adhesive comprises the following components: 15-30 parts of 1, 6-hexanediol diacrylate gel, 20-40 parts of isooctyl acrylate, 18-36 parts of AA refined acrylic acid, 10-20 parts of 1-hydroxycyclohexyl phenyl ketone and 10-20 parts of dodecyl mercaptan; 3-8 parts of magnetic powder.

2. The magnetically permeable pressure sensitive adhesive according to claim 1, wherein: the preparation method of the 1, 6-hexanediol diacrylate gel comprises the following steps: adding persulfate into a mixed solution of 1, 6-hexanediol diacrylate and triethanolamine in a weight ratio of 1:1, and uniformly mixing to obtain the 1, 6-hexanediol diacrylate gel.

3. The magnetically permeable pressure sensitive adhesive according to claim 2, wherein: the persulfate is any one of zinc sulfate or magnesium sulfate.

4. The magnetically permeable pressure sensitive adhesive according to claim 1, wherein: the preparation method of the AA fine acrylic acid comprises the following steps: absorbing and rectifying propylene oxidation products by water to obtain crude acrylic acid containing 10-1000 ppm of acrolein, furfural and/or benzaldehyde and other impurities as a raw material, adding a polymerization inhibitor hydroquinone into the crude acrylic acid, selecting an alcohol substance containing 3-10 carbon atoms as an aldehyde removing reagent, reacting with aldehyde in the crude acrylic acid, then carrying out intermittent or continuous reduced pressure rectification with the vacuum degree of 0.1-50 kPa to obtain polymer grade refined acrylic acid with zero aldehyde content and the acrylic acid purity of more than 99.80 percent, then adding resveratrol with the weight part of acrylic acid of 0.1-0.5 percent into the polymer grade refined acrylic acid,

polymerizing for 20min under the illumination of 2000LEX200-500nm to obtain AA refined acrylic acid.

5. The magnetically permeable pressure sensitive adhesive according to claim 4, wherein: in the process of preparing AA refined acrylic acid, resveratrol with the weight part of acrylic acid of 0.1-0.5 percent is added into polymer grade refined acrylic acid.

6. The magnetically permeable pressure sensitive adhesive according to claim 1, wherein: the formula of the components is as follows: 15-25 parts of 1, 6-hexanediol diacrylate gel, 30-40 parts of isooctyl acrylate, 20-30 parts of AA refined acrylic acid, 10-20 parts of 1-hydroxycyclohexyl phenyl ketone and 10-20 parts of dodecyl mercaptan; 3-5 parts of magnetic powder.

7. The magnetically permeable pressure sensitive adhesive according to claim 1, wherein: the weight portion ratio of the 1, 6-hexanediol diacrylate gel to the magnetic powder is 5-6: 1.

8. A method for preparing the magnetically permeable pressure sensitive adhesive according to any one of claims 1 to 7, comprising the steps of: firstly, uniformly mixing 1, 6-hexanediol diacrylate gel and magnetic powder, then adding isooctyl acrylate, 1-hydroxycyclohexyl phenyl ketone and dodecyl mercaptan, adding into a container, uniformly stirring, and finally adding AA fine acrylic acid under the illumination of the intensity of 2200lex and the wavelength of 500 nm; and (5) stirring for 20-50min under illumination to obtain the magnetic conductive pressure sensitive adhesive.

9. The utility model provides a magnetic conduction sticky tape which characterized in that: is prepared by coating the magnetic conductive pressure sensitive adhesive of any one of claims 1 to 7.

Technical Field

The invention belongs to the technical field of adhesives, and relates to a magnetic conductive pressure sensitive adhesive, a preparation method thereof and a magnetic conductive adhesive tape.

Background

With the continuous iteration updating of electronic products, consumer electronics and automotive electronics gradually move to the directions of high-frequency large current, low power consumption, low cost and thinness, and the power inductor has the advantages of high production speed, high automation degree and stable electrical property and is widely used in electronic products; however, magnetic cores also have some drawbacks: the gluing agent distributes evenly compactly inadequately after the product rubber coating, has the space between copper line and the magnetic cement, has the noise production when passing through the electric current to the value of power consumption of this type magnetic core is bigger.

The 5G technology enables the 5G electronic appliance and instrument industry to be developed, the electronic components are mostly magnetic elements, the magnetic elements are made of magnetic materials, and magnetic conductive adhesives are needed for bonding and sealing the magnetic elements. The magnetic conductive adhesive is a functional adhesive with both magnetic conductive function and adhesive property, which is composed of a resin main body, a toughening agent, a curing agent, a magnetic filler and the like, and is cured under specific conditions, and the cured adhesive layer can show excellent magnetic conductive property. The magnetic conductive adhesive is mainly applied to the bonding and sealing of magnetic elements. The resin main body plays a role in medium and bonding, the resin main body of the existing magnetic conductive adhesive is generally epoxy resin, silicone grease, polyimide and the like, the curing process of the resin needs higher temperature, and is not beneficial to the operation of the procedures of bonding, packaging and the like of a magnetic element, meanwhile, the resin material is a disposable material, the bonding task is completed after curing, the structure of the material needs to be destroyed when being disassembled, and the material cannot be torn off and recycled, so that the magnetic conductive adhesive is inconvenient to use in some occasions.

Disclosure of Invention

The invention aims to solve the problems that the common pressure-sensitive adhesive in the electronic equipment in the prior art is complex in packaging operation and cannot be torn off for multiple times, and the formula and the preparation method of the pressure-sensitive adhesive component are deeply researched and developed to obtain the pressure-sensitive adhesive with higher viscosity, and the bonded magnetizer has a series of advantages of firmness, wear resistance, small stress, high resistivity, insensitivity to temperature change, capability of improving the magnetic conductivity of components and parts and the like.

In order to achieve the purposes, the specific scheme is as follows:

a magnetic conductive pressure sensitive adhesive comprises the following components: 15-30 parts of 1, 6-hexanediol diacrylate gel, 20-40 parts of isooctyl acrylate, 18-36 parts of AA refined acrylic acid, 10-20 parts of 1-hydroxycyclohexyl phenyl ketone and 10-20 parts of dodecyl mercaptan; 3-8 parts of magnetic powder, wherein the preparation method of the 1, 6-hexanediol diacrylate gel comprises the following steps: adding persulfate into a mixed solution of 1, 6-hexanediol diacrylate and triethanolamine in a weight ratio of 3:1-2, and uniformly mixing to obtain the 1, 6-hexanediol diacrylate gel.

Wherein the persulfate is any one of zinc sulfate or magnesium sulfate, and the 1, 6-hexanediol diacrylate is zinc salt or magnesium salt.

The AA fine acrylic acid is prepared by the following steps: absorbing and rectifying a propylene oxidation product by water to obtain crude acrylic acid containing 10-1000 ppm of acrolein, furfural and/or benzaldehyde and other impurities as a raw material, adding a polymerization inhibitor hydroquinone into the crude acrylic acid, selecting an alcohol substance containing 3-10 carbon atoms as an aldehyde removing reagent, reacting with aldehyde in the crude acrylic acid, then carrying out intermittent or continuous reduced pressure rectification, wherein the vacuum degree of the reduced pressure rectification is 0.1-50 kPa, preferably 0.5-20 kPa, obtaining polymerization grade refined acrylic acid with zero aldehyde content and the purity of the acrylic acid of more than 99.80%, then adding resveratrol with the weight part of the acrylic acid of 0.1-3% into the polymerization grade refined acrylic acid, and polymerizing for 20min under the illumination of 200-500nm of 2000LEX to obtain AA refined acrylic acid.

Preferably, in the process of preparing AA refined acrylic acid, resveratrol with the weight part of acrylic acid of 0.1-0.5 percent is added into polymer grade refined acrylic acid.

Preferably, the component formulation is as follows: 15-25 parts of 1, 6-hexanediol diacrylate gel, 30-40 parts of isooctyl acrylate, 20-30 parts of AA refined acrylic acid, 10-20 parts of 1-hydroxycyclohexyl phenyl ketone and 10-20 parts of dodecyl mercaptan; 3-5 parts of magnetic powder.

Preferably, the weight part ratio of the 1, 6-hexanediol diacrylate gel to the magnetic powder is 5-6: 1.

The magnetic powder is a mixture of iron silicon, iron silicon chromium, iron silicon aluminum and carbonyl iron powder, and the weight part ratio of each component is; iron silicon: iron, silicon and chromium: iron-silicon-aluminum: carbonyl iron powder is 1:5:2: 3.

A preparation method of a magnetic conductive pressure sensitive adhesive comprises the following steps: firstly, uniformly mixing 1, 6-hexanediol diacrylate gel and magnetic powder, then adding isooctyl acrylate, 1-hydroxycyclohexyl phenyl ketone and dodecyl mercaptan, adding into a container, uniformly stirring, and finally adding AA fine acrylic acid under the illumination of the intensity of 2200lex and the wavelength of 500 nm; and (5) stirring for 20-50min under illumination to obtain the magnetic conductive pressure sensitive adhesive.

The magnetic conductive adhesive tape is prepared by coating the magnetic conductive pressure sensitive adhesive.

Compared with the prior art, the invention has the following technical effects:

1. the UV light is used for treating the preparation process instead of heating, the processing mode is simple, the production is more energy-saving and environment-friendly, and the prepared pressure-sensitive adhesive has strong weather resistance to high temperature and low temperature.

2. The AA refined acrylic acid which is specially processed has unexpected technical effect on the aspect of high temperature resistance, and compared with the existing magnetic conductive pressure sensitive adhesive, the AA refined acrylic acid has stronger viscosity and longer high temperature resistance time.

3. Through a large number of innovations and tests, the invention discovers that when the weight part ratio of the specially prepared 1, 6-hexanediol diacrylate gel to the magnetic powder is 5-6:1, the viscosity of the prepared magnetic conductive pressure sensitive adhesive is less in 3H viscosity change at high temperature of 80 ℃ and low temperature of 50 ℃, the magnetic conductivity change is not obvious, and the magnetic conductive pressure sensitive adhesive can be widely applied to electronic communication equipment in high-pressure or low-pressure areas.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a magnetic conductive pressure-sensitive adhesive, which comprises the following components: 1, 6-hexanediol diacrylate gel, isooctyl acrylate, AA refined acrylic acid, 1-hydroxycyclohexyl phenyl ketone, dodecyl mercaptan and magnetic powder.

The preparation method of the 1, 6-hexanediol diacrylate gel comprises the following steps: adding zinc persulfate into a mixed solution of zinc 1, 6-hexanediol diacrylate and triethanolamine in a weight ratio of 3:1-2, and uniformly mixing, wherein the weight ratio of the zinc persulfate to the zinc 1, 6-hexanediol diacrylate is 1: 20-30, and obtaining the 1, 6-hexanediol diacrylate gel. .

The preparation process of the AA refined acrylic acid comprises the following steps: absorbing and rectifying a propylene oxidation product with water to obtain crude acrylic acid containing 10-1000 ppm of acrolein, furfural and/or benzaldehyde and other impurities as a raw material, adding a polymerization inhibitor hydroquinone into the crude acrylic acid, selecting an alcohol substance containing 3-10 carbon atoms as an aldehyde removing reagent, reacting with aldehyde in the crude acrylic acid, then carrying out intermittent or continuous reduced pressure rectification, wherein the vacuum degree of the reduced pressure rectification is 0.1-50 kPa, preferably 0.5-20 kPa, obtaining polymerization grade refined acrylic acid with the aldehyde content of zero and the acrylic acid purity of more than 99.80%, then adding resveratrol with the weight part of acrylic acid of 0.1-0.5% into the polymerization grade refined acrylic acid, and polymerizing for 20min under the illumination of 2000LEX200-500nm to obtain AA refined acrylic acid.