CN113416502B - Insulating heat-conducting double-sided adhesive tape and preparation method thereof - Google Patents
Insulating heat-conducting double-sided adhesive tape and preparation method thereof Download PDFInfo
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- CN113416502B CN113416502B CN202110529018.0A CN202110529018A CN113416502B CN 113416502 B CN113416502 B CN 113416502B CN 202110529018 A CN202110529018 A CN 202110529018A CN 113416502 B CN113416502 B CN 113416502B
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F218/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F218/02—Esters of monocarboxylic acids
- C08F218/04—Vinyl esters
- C08F218/08—Vinyl acetate
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J131/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/21—Paper; Textile fabrics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/10—Presence of inorganic materials
- C09J2400/14—Glass
- C09J2400/143—Glass in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides an insulating heat-conducting double-sided tape, which comprises an insulating heat-conducting pressure-sensitive adhesive and a base material, wherein the raw materials of the insulating heat-conducting pressure-sensitive adhesive comprise: 22-28 parts of isooctyl acrylate, 10-15 parts of butyl acrylate, 5-8 parts of methyl acrylate, 8-15 parts of isobornyl acrylate, 8-15 parts of acrylic acid, 0.5-0.6 part of tert-butyl hydroperoxide, 20-30 parts of ceramic microspheres, 0.5-0.6 part of ammonium persulfate, 35-50 parts of vinyl acetate and 5-10 parts of heat conducting agent. According to the invention, the ceramic microspheres and the heat conducting agent are combined to obtain the pressure-sensitive adhesive tape with good insulativity and excellent heat conducting effect.
Description
Technical Field
The invention belongs to the technical field of adhesives, and particularly relates to an insulating heat-conducting double-sided adhesive tape.
Background
Pressure sensitive tapes are a particular type of adhesive. The adhesive is coated on the strip-shaped substrate. When in use, the adhesive tape is lightly pressed to adhere the adhesive tape to the surface of the adhered object. Pressure-sensitive adhesives are the most important component of pressure-sensitive tapes. The function is to give the tape pressure sensitive adhesive properties. As the base material, fabrics, plastic films, papers and the like are mainly used.
With the gradual penetration of new energy automobiles into the social life of people, the increasingly prominent safety problem of the new energy automobiles also attracts more and more attention, and the safety of the power battery serving as a core component of the electric vehicle has a decisive influence on the safety performance of the new energy automobiles. In the safety accidents of new energy automobiles in the current market, the low proportion is caused by the insulativity and the heat conductivity of the power battery. Therefore, the market places higher demands on the insulation and thermal conductivity of the power cells. At present, a power battery is generally required to be wrapped by using a termination adhesive tape, and a series of safety problems such as poor heat conduction performance, short circuit and spontaneous combustion of the battery caused by the fact that the internal temperature is too high exist in the termination adhesive tape used in the market at present generally.
In order to solve the problems, the invention provides the double-sided adhesive tape which is applied to the power battery and can meet the safety requirements of the current power battery, and the double-sided adhesive tape has good insulating property and good thermal conductivity.
Disclosure of Invention
The invention aims to provide an insulating heat-conducting double-sided adhesive tape, which aims at solving the problems of poor insulativity and low heat-conducting property in the prior art.
To achieve the above object, the specific scheme is as follows:
the utility model provides an insulating heat conduction double-sided tape, includes insulating heat conduction pressure sensitive adhesive and substrate, and the raw materials of insulating heat conduction pressure sensitive adhesive include: 22-28 parts of isooctyl acrylate, 10-15 parts of butyl acrylate, 5-8 parts of methyl acrylate, 8-15 parts of isobornyl acrylate, 8-15 parts of acrylic acid, 0.5-0.6 part of tert-butyl hydroperoxide, 20-30 parts of ceramic microspheres, 0.5-0.6 part of ammonium persulfate, 35-50 parts of vinyl acetate and 5-10 parts of heat conducting agent. The preparation method of the insulating heat-conducting double-sided tape comprises the following steps:
1) Taking the raw materials in parts by weight of the formula for standby;
2) Mixing and stirring 50% of isooctyl acrylate, 50% of butyl acrylate, 60% of methyl acrylate, 60% of isobornyl acrylate, 60% of acrylic acid and 50% of vinyl acetate in a reaction kettle until the mixture is uniform, heating the mixture to 82-88 ℃ and keeping the temperature; 3) Mixing and stirring the rest isooctyl acrylate, butyl acrylate, methyl acrylate, isobornyl acrylate, acrylic acid, vinyl acetate and tert-butyl hydroperoxide until the mixture is uniform to obtain a dropwise liquid, and uniformly dropwise adding the dropwise liquid into a reaction kettle;
4) After the dripping is completed, carrying out heat preservation reaction for a period of time, and then adding ammonium persulfate and mixing until the mixture is uniform;
5) Cooling the temperature in the reaction kettle to room temperature, adding ceramic microspheres and a heat conducting agent, mixing until the mixture is uniform, heating to 85-90 ℃ and keeping the temperature for 20-25min, and naturally cooling to obtain an insulating heat conducting pressure-sensitive adhesive;
6) And uniformly coating the insulating heat-conducting pressure-sensitive adhesive on the two sides of the heat-conducting base material to obtain the insulating heat-conducting double-sided adhesive tape.
Preferably, the adhesive raw material of the insulating heat-conducting double-sided tape comprises: 25-28 parts of isooctyl acrylate, 12-15 parts of butyl acrylate, 5-8 parts of methyl acrylate, 8-15 parts of isobornyl acrylate, 8-15 parts of acrylic acid, 0.5-0.6 part of tert-butyl hydroperoxide, 20-30 parts of ceramic microspheres, 0.5-0.6 part of ammonium persulfate, 35-50 parts of vinyl acetate and 5-8 parts of heat conducting agent.
The preparation method of the ceramic microsphere comprises the following steps: (1) Silane coupling agent KH550, ethanol and deionized water according to the proportion of 40:52:11, hydrolyzing for 1h to obtain a modified liquid, mixing the modified liquid with Al 2 O 3 Ceramic powder (average particle diameter)<0.2 μm) according to 1:8, stirring for 30min at a rotating speed of 1000rpm, and drying at 120 ℃ to obtain modified alumina ceramic powder;
(2) 150g of modified alumina ceramic powder is added into 3L of deionized water, stirred for 2min at a rotating speed of 1500rpm, and then treated by 28000HZ ultrasonic waves for 2min to obtain a dispersion;
(3) 10mL of glycerol is injected into the dispersion by a syringe, stirring is carried out for 60min at a rotation speed of 2000rpm, granulation is carried out, a wet ceramic microsphere blank is obtained, the ceramic microsphere blank is dried for 3h in a constant temperature drying oven at 80 ℃, and then sintering is carried out in a muffle furnace, thus obtaining the ceramic microsphere.
The preparation method of the heat conducting agent comprises the following steps: (1) Adding acrylic powder with the particle size of less than 3mm into vinyl silicone oil, then placing the vinyl silicone oil into a high-speed dispersing machine, and stirring to obtain a solution A; (2) Adding titanate, poly (methyl hydrogen siloxane) and methyl vinyl cyclosiloxane into the solution A obtained in the step (1), and uniformly stirring to obtain the heat conducting agent.
Preferably, the heat transfer agent material, poly (methylhydrosiloxane) CASNo:9004-73-3, is from Shanghai pacifying Utility Co.
The heat conducting base material is glass fiber fabric.
The invention is different from the prior art in that the invention has the following technical effects:
1. according to the invention, the ceramic microspheres and the heat conducting agent are combined to obtain the pressure-sensitive adhesive tape with good insulativity and excellent heat conducting effect.
2. The special preparation method of the invention realizes that the insulating heat conduction adhesive tape has excellent physical performance, high shearing strength, small internal stress of the cured adhesive layer and high bonding strength.
3. The insulating property of the invention is close to that of rubber, but the heat conducting property is far better than that of rubber.
Detailed Description
The following will clearly and fully describe the technical aspects of the invention in connection with the embodiments of the invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A first part:
preparing a heat conducting agent:
weighing the following raw materials:
8kg of vinyl silicone oil
Poly (methylhydrosiloxane) 5kg
Methyl vinyl cyclosiloxane 0.04kg
Acrylic powder 0.6kg
Titanate 1.5kg.
The raw materials are prepared into a heat conduction agent, and the specific preparation method comprises the following steps: (1) Adding acrylic powder with the particle size of less than 3mm into vinyl silicone oil, then placing the vinyl silicone oil into a high-speed dispersing machine, and stirring to obtain a solution A; (2) Adding titanate, poly (methyl hydrogen siloxane) and methyl vinyl cyclosiloxane into the solution A obtained in the step (1), and uniformly stirring to obtain the heat conducting agent A.
Example 1
Weighing the following raw materials in weight:
isooctyl acrylate 22kg;
14kg of butyl acrylate;
8kg of methyl acrylate;
10kg of isobornyl acrylate;
acrylic acid 8kg;
0.5kg of tert-butyl hydroperoxide;
20kg of ceramic microspheres;
0.6kg of ammonium persulfate;
50kg of vinyl acetate;
8kg of a heat conducting agent A;
preparing an insulating heat-conducting double-sided adhesive tape: 1) Adding vinyl acetate, ammonium persulfate, a heat conducting agent A and maleic anhydride into the acrylic ester copolymer, uniformly mixing and stirring under a semi-sealing condition, 2) heating to 80-100 ℃, and maintaining the temperature for 50-60min to obtain the insulating heat conducting double-sided adhesive tape of the embodiment 1.
Preparing an insulating heat-conducting double-sided adhesive tape:
1) Taking the raw materials in parts by weight of the formula for standby;
2) Mixing and stirring 50% of isooctyl acrylate, 50% of butyl acrylate, 60% of methyl acrylate, 60% of isobornyl acrylate, 60% of acrylic acid and 50% of vinyl acetate in a reaction kettle until the mixture is uniform, heating the mixture to 82-88 ℃ and keeping the temperature; 3) Mixing and stirring the rest isooctyl acrylate, butyl acrylate, methyl acrylate, isobornyl acrylate, acrylic acid, vinyl acetate and tert-butyl hydroperoxide until the mixture is uniform to obtain a dropwise liquid, and uniformly dropwise adding the dropwise liquid into a reaction kettle;
4) After the dripping is completed, carrying out heat preservation reaction for a period of time, and then adding ammonium persulfate and mixing until the mixture is uniform;
5) Cooling the temperature in the reaction kettle to room temperature, adding ceramic microspheres and a heat conducting agent A, mixing until the mixture is uniform, heating to 85-90 ℃ and keeping the temperature for 20-25min, and naturally cooling to obtain an insulating heat conducting pressure-sensitive adhesive;
6) And uniformly coating the insulating heat-conducting pressure-sensitive adhesive on the two sides of the heat-conducting base material, and attaching release paper to obtain the insulating heat-conducting double-sided adhesive tape.
The formulations of examples 2-6 are set forth in the following table, with reference to example 1.
The insulating and heat conducting double-sided tape of 6 examples 1-6 described above was subjected to a test, and the average was taken three times, and the test results were as follows:
from the above test data for examples 1-6, it can be seen that examples 1-6 have higher thermal conductivities and insulation properties approaching rubber, both of which are greater than 17 megaohms.
A second part:
preparing a heat conducting agent:
weighing the following raw materials:
8kg of vinyl silicone oil
Poly (methylhydrosiloxane) 5kg
Methyl vinyl cyclosiloxane 0.04kg
0.6kg of acrylic powder.
The raw materials are prepared into a heat conduction agent, and the specific preparation method comprises the following steps: (1) Adding acrylic powder with the particle size of less than 3mm into vinyl silicone oil, then placing the vinyl silicone oil into a high-speed dispersing machine, and stirring to obtain a solution A; (2) And (3) adding poly (methyl hydrogen siloxane) and methyl vinyl cyclosiloxane into the solution A obtained in the step (1), and uniformly stirring to obtain the heat conducting agent B.
Example 7
Weighing the following raw materials in weight:
isooctyl acrylate 22kg;
14kg of butyl acrylate;
8kg of methyl acrylate;
10kg of isobornyl acrylate;
acrylic acid 8kg;
0.5kg of tert-butyl hydroperoxide;
20kg of ceramic microspheres;
0.6kg of ammonium persulfate;
50kg of vinyl acetate;
8kg of a heat conducting agent B;
preparing an insulating heat-conducting double-sided adhesive tape: 1) Adding vinyl acetate, ammonium persulfate, a heat conducting agent B and maleic anhydride into the acrylic ester copolymer, uniformly mixing and stirring under a semi-sealing condition, 2) heating to 80-100 ℃, and maintaining the temperature for 50-60min to obtain the insulating heat conducting double-sided adhesive tape of the embodiment 7.
Preparing an insulating heat-conducting double-sided adhesive tape:
1) Taking the raw materials in parts by weight of the formula for standby;
2) Mixing and stirring 50% of isooctyl acrylate, 50% of butyl acrylate, 60% of methyl acrylate, 60% of isobornyl acrylate, 60% of acrylic acid and 50% of vinyl acetate in a reaction kettle until the mixture is uniform, heating the mixture to 82-88 ℃ and keeping the temperature; 3) Mixing and stirring the rest isooctyl acrylate, butyl acrylate, methyl acrylate, isobornyl acrylate, acrylic acid, vinyl acetate and tert-butyl hydroperoxide until the mixture is uniform to obtain a dropwise liquid, and uniformly dropwise adding the dropwise liquid into a reaction kettle;
4) After the dripping is completed, carrying out heat preservation reaction for a period of time, and then adding ammonium persulfate and mixing until the mixture is uniform;
5) Cooling the temperature in the reaction kettle to room temperature, adding ceramic microspheres and a heat conducting agent B, mixing until the mixture is uniform, heating to 85-90 ℃ and keeping the temperature for 20-25min, and naturally cooling to obtain an insulating heat conducting pressure-sensitive adhesive;
6) And uniformly coating the insulating heat-conducting pressure-sensitive adhesive on the two sides of the heat-conducting base material, and attaching release paper to obtain the insulating heat-conducting double-sided adhesive tape.
The formulations of examples 8-12 are based on the following table, and the preparation method is referred to example 8.
The insulating and heat conducting double-sided tape of examples 7-12 above was tested, and the average was taken three times, and the test results were as follows:
the test results of examples 7-12 show that the peel strength is slightly improved over examples 1-6, but that the peel is also residue free, the average resistance is lower than examples 1-7, and the thermal conductivity is slightly lower than examples 1-6.
Third section:
with reference to example 1, no ceramic microspheres were used, and the specific formulation was as follows:
the insulating and heat conducting double-sided tape of examples 13-18 described above was tested, and the average was taken three times, and the test results were as follows:
the test results for examples 13-18 show that the average peel strength is higher than for examples 1-12, but the peel is still residue free, the electrical resistance is significantly less, and the thermal conductivity is at an intermediate level for examples 1-12.
Fourth part:
the specific formulation without the heat-conducting agent of the present invention is as follows, and the preparation method is described in example 1
The insulating and heat conducting double-sided tape of examples 19-24 described above was subjected to a test, and the test was averaged three times, and the test results were as follows:
from the above data, it can be seen that the pressure-sensitive adhesive tape without the heat conductive agent added not only has an improved peel strength, the peeling remains, but also has a significantly reduced heat conductivity as compared with examples 1 to 18, and no significant change in short lease occurs.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (5)
1. The utility model provides an insulating heat conduction double-sided tape, includes insulating heat conduction pressure sensitive adhesive and substrate, and the raw materials of insulating heat conduction pressure sensitive adhesive include: 22-28 parts of isooctyl acrylate, 10-15 parts of butyl acrylate, 5-8 parts of methyl acrylate, 8-15 parts of isobornyl acrylate, 8-15 parts of acrylic acid, 0.5-0.6 part of tert-butyl hydroperoxide, 20-30 parts of ceramic microspheres, 0.5-0.6 part of ammonium persulfate and 35-50 parts of vinyl acetate; 5-10 parts by weight of a heat conducting agent, wherein the preparation method comprises the following steps of 1) taking raw materials in parts by weight of a formula for standby; 2) Mixing and stirring 50% of isooctyl acrylate, 50% of butyl acrylate, 60% of methyl acrylate, 60% of isobornyl acrylate, 60% of acrylic acid and 50% of vinyl acetate in a reaction kettle until the mixture is uniform, heating the mixture to 82-88 ℃ and keeping the temperature; 3) Mixing and stirring the rest isooctyl acrylate, butyl acrylate, methyl acrylate, isobornyl acrylate, acrylic acid, vinyl acetate and tert-butyl hydroperoxide until the mixture is uniform to obtain a dropwise liquid, and uniformly dropwise adding the dropwise liquid into a reaction kettle; 4) After the dripping is completed, carrying out heat preservation reaction for a period of time, and then adding ammonium persulfate and mixing until the mixture is uniform; 5) Cooling to room temperature, adding ceramic microsphere and heat conductive agent, and mixingUniformly heating to 85-90 ℃ and keeping for 20-25min, and then naturally cooling to obtain the insulating heat-conducting pressure-sensitive adhesive; 6) Uniformly coating the insulating heat-conducting pressure-sensitive adhesive on the two sides of the heat-conducting base material to obtain an insulating heat-conducting double-sided adhesive tape; the preparation method of the ceramic microsphere comprises the following steps: (1) Silane coupling agent KH550, ethanol and deionized water according to the proportion of 40:52:11, hydrolyzing for 1h to obtain a modified liquid, mixing the modified liquid with Al 2 O 3 Ceramic powder according to 1:8, stirring for 30min at a rotating speed of 1000rpm, and drying at 120 ℃ to obtain modified alumina ceramic powder; (2) 150g of modified alumina ceramic powder is added into 3L of deionized water, stirred for 2min at a rotating speed of 1500rpm, and then treated by 28000HZ ultrasonic waves for 2min to obtain a dispersion; (3) 10mL of glycerol is injected into the dispersion by a syringe, stirring is carried out for 60min at a rotation speed of 2000rpm, granulation is carried out, a wet ceramic microsphere blank is obtained, the ceramic microsphere blank is dried for 3h in a constant temperature drying oven at 80 ℃, and then sintering is carried out in a muffle furnace, thus obtaining the ceramic microsphere.
2. The insulating and thermally conductive double-sided tape of claim 1, wherein: the insulating heat-conducting pressure-sensitive adhesive comprises the following raw materials: 25-28 parts of isooctyl acrylate, 12-15 parts of butyl acrylate, 5-8 parts of methyl acrylate, 8-15 parts of isobornyl acrylate, 8-15 parts of acrylic acid, 0.5-0.6 part of tert-butyl hydroperoxide, 20-30 parts of ceramic microspheres, 0.5-0.6 part of ammonium persulfate, 35-50 parts of vinyl acetate and 5-8 parts of heat conducting agent.
3. The insulating and thermally conductive double-sided tape of claim 1, wherein: the preparation method of the heat conducting agent comprises the following steps: (1) Adding acrylic powder with the particle size of less than 3mm into vinyl silicone oil, then placing the vinyl silicone oil into a high-speed dispersing machine, and stirring to obtain a solution A; (2) Adding titanate, poly (methyl hydrogen siloxane) and methyl vinyl cyclosiloxane into the solution A obtained in the step (1), and uniformly stirring to obtain the heat conducting agent.
4. The insulating and thermally conductive double-sided tape of claim 3, wherein: the heat conductive agent raw material comprises poly (methyl hydrogen siloxane) CASNo 9004-73-3, which is obtained from Shanghai Fusheng Co., ltd.
5. The insulating and thermally conductive double-sided tape of claim 1, wherein: the heat conducting base material is glass fiber fabric.
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CN114506573B (en) * | 2022-01-04 | 2023-10-31 | 广东赞誉防霉科技有限公司 | Mildew-proof tablet and application thereof |
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