CN115806764B - Insulating paint for new energy automobile battery and preparation method thereof - Google Patents
Insulating paint for new energy automobile battery and preparation method thereof Download PDFInfo
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- CN115806764B CN115806764B CN202310010428.3A CN202310010428A CN115806764B CN 115806764 B CN115806764 B CN 115806764B CN 202310010428 A CN202310010428 A CN 202310010428A CN 115806764 B CN115806764 B CN 115806764B
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- 239000003973 paint Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 70
- 239000011248 coating agent Substances 0.000 claims abstract description 66
- 125000002723 alicyclic group Chemical group 0.000 claims abstract description 25
- 239000003822 epoxy resin Substances 0.000 claims abstract description 25
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 25
- 239000000178 monomer Substances 0.000 claims abstract description 23
- 239000012952 cationic photoinitiator Substances 0.000 claims abstract description 21
- 238000005507 spraying Methods 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 33
- 239000000843 powder Substances 0.000 claims description 21
- 239000002270 dispersing agent Substances 0.000 claims description 16
- 239000010453 quartz Substances 0.000 claims description 16
- 238000009736 wetting Methods 0.000 claims description 16
- 229910021485 fumed silica Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000003504 photosensitizing agent Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 15
- 230000001070 adhesive effect Effects 0.000 abstract description 15
- 238000003912 environmental pollution Methods 0.000 abstract description 6
- 239000002904 solvent Substances 0.000 abstract description 5
- 239000000758 substrate Substances 0.000 abstract description 5
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 21
- 238000001723 curing Methods 0.000 description 16
- 238000009413 insulation Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 150000003254 radicals Chemical class 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 4
- 239000011353 cycloaliphatic epoxy resin Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000000016 photochemical curing Methods 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 238000003848 UV Light-Curing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- -1 Acrylic ester Chemical class 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention has specifically disclosed an insulating coating used for new energy automobile battery and its preparation method, the said insulating coating uses the cationic photoinitiator to initiate the alicyclic epoxy resin and carries on the polyreaction, carry on UV solidification under the normal temperature state, have high-efficient, energy-conserving, environment-friendly characteristic, because the alicyclic epoxy resin solidifies the shrinkage rate low, the shrinkage stress is small, make it have good characteristic of adhesive force, can still guarantee the adhesive force of the coating to the substrate under the condition of high film thickness, and the alicyclic epoxy resin is good in insulativity, the thickness of the paint film of the one-time spraying of the insulating coating can reach 80 microns, has promoted the insulativity of the insulating coating greatly; in addition, the insulating coating does not contain volatile solvents based on the characteristics of the active monomers, so that the problem of environmental pollution does not exist.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an insulating coating for a new energy automobile battery and a preparation method thereof.
Background
Due to the increasingly prominent environmental protection problem, people pay more attention to environmental protection, and new energy automobiles are gradually replaced by fuel automobiles based on the characteristics of zero emission and environmental protection. In order to improve the cruising ability of a new energy automobile, most of the battery cores are designed into a tetragonal structure, and then the battery cores are connected in series and are closely arranged to be bound into a battery pack, so that the cruising ability of the automobile is improved, and meanwhile, the space is also saved. Because the interval between adjacent electric core is little, consequently, need carry out insulation treatment between electric core and the electric core, common insulation treatment is to carry out the diolame treatment at electric core skin, like chinese patent CN 113823804A, but the diolame treatment leakproofness is relatively poor, and insulating effect is unstable, leads to its security to the technology of diolame treatment is complicated, production efficiency is low. In order to solve the problem of tightness and the like of the coating treatment process, the Chinese patent CN 112322182A uses a spray coating process to replace the coating treatment process, and specifically adopts a single coating to be directly sprayed on the surface of the battery cell for high-temperature curing so as to ensure that the battery cell has excellent insulation and voltage resistance. At present, a process of spraying a coating is generally adopted in the market to perform insulation treatment on a battery pack, but the coating used in the technology can be cured under the high temperature condition (baking for 30min at 150-180 ℃), so that the energy consumption is high, the production efficiency is low, potential safety hazards exist in high-temperature baking, and meanwhile, the coating contains an organic volatile solvent, so that the problems of environmental pollution and the like exist.
Disclosure of Invention
In order to solve the technical problems, the invention provides an insulating paint for a new energy automobile battery, which comprises the following components in percentage by weight:
30-50 parts of alicyclic epoxy resin
20-40 parts of active monomer
5-8 parts of fumed silica
10-30 parts of quartz powder
Wetting dispersant 0.2-1 parts
3-5 parts of cationic photoinitiator
0.1-0.5 part of photosensitive sensitizer.
Preferably, the cycloaliphatic epoxy resin is at least one of UVLCURE 140 and TR-TCM218 of sartomer.
Preferably, the reactive monomer is EM3060-T of changxing chemistry.
Preferably, the cationic photoinitiator is Omnicat 320 of IMG.
Preferably, the wetting dispersant is EFKA-4010 of Ephragma.
Preferably, the photosensitizing agent is TR-PSS-205 of a strong new material.
Preferably, the fumed silica is a380 of desilication.
Preferably, the quartz powder is Silverbond 925 of the family of Sibiricaceae.
The invention also provides a preparation method of the insulating paint for the new energy automobile battery, which is used for preparing the insulating paint for the new energy automobile battery and at least comprises the following steps:
s1, adding an active monomer, a cationic photoinitiator and a photosensitive sensitizer into a dispersing kettle, and dispersing for 10-20 minutes at a rotating speed of 800-1200 rpm until the cationic photoinitiator and the photosensitive sensitizer are completely dissolved in the active monomer;
s2, adding alicyclic epoxy resin and a wetting dispersant into the dispersing kettle in the step S1, dispersing for 10-20 minutes at a rotating speed of 800-1200 rpm to enable the wetting dispersant to be fully and uniformly dispersed, adding fumed silica and quartz powder while stirring, and dispersing for 20-30 minutes at a rotating speed of 800-1200 rpm;
s3, transferring the mixture dispersed in the step S2 into a grinder for grinding until the fineness is less than or equal to 20 mu m, and obtaining the insulating coating for the new energy automobile battery.
The invention also provides an application of the insulating paint for the new energy automobile battery, wherein the insulating paint for the new energy automobile battery or the insulating paint for the new energy automobile battery prepared by the insulating paint is applied to the new energy automobile battery, and the application specific process is as follows: the prepared insulating paint is coated on the outer surface of the workpiece of the new energy automobile battery by adopting an air spraying mode, baked for 3 to 5 minutes at the temperature of between 40 and 60 ℃, and then transferred into a UV furnace to be used for 5000 to 8000mJ/cm 2 Wherein the thickness of the coating layer of the insulating paint during air spraying is 60-70 μm.
Compared with the prior art, the insulating paint for the new energy automobile battery, the preparation method and the application thereof provided by the invention have the characteristics that the cationic photoinitiator is adopted to trigger the alicyclic epoxy resin to carry out polymerization reaction, and the alicyclic epoxy resin is subjected to UV curing at normal temperature, so that the insulating paint has the characteristics of high efficiency, energy conservation and environmental protection, and the adhesive force of the coating to a substrate can be ensured under the condition of high film thickness due to low curing shrinkage rate and small shrinkage stress of the alicyclic epoxy resin, and the insulating property of the alicyclic epoxy resin is good, the thickness of a paint film sprayed at one time of the insulating paint can reach 80 microns, and the insulating property of the insulating paint coating is greatly improved; in addition, the insulating coating does not contain volatile solvents based on the characteristics of the active monomers, so that the problem of environmental pollution is avoided; by combining the cationic photo-curing technique with the insulating coating, the shrinkage rate of the cationic photo-curing coating is lower than that of the free radical curing coating, so that the adhesive force of the coating to the substrate is ensured under the condition that the insulating property of the coating of the insulating coating is improved by the high film thickness.
Drawings
FIG. 1 is a flow chart of a method for preparing an insulating paint for a new energy automobile battery in the invention.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
The invention provides an insulating paint for a new energy automobile battery, which comprises the following components in percentage by weight:
30-50 parts of alicyclic epoxy resin
20-40 parts of active monomer
5-8 parts of fumed silica
10-30 parts of quartz powder
Wetting dispersant 0.2-1 parts
3-5 parts of cationic photoinitiator
0.1-0.5 part of photosensitive sensitizer.
In this embodiment, the cycloaliphatic epoxy resin is at least one of UVLCURE 140 and TR-TCM218 of sartomer. Compared with the UV resin cured by the free radicals, the alicyclic epoxy resin has low shrinkage rate, small shrinkage stress and good adhesive force on metal materials when being cured, so that the adhesive force of the coating is ensured; the selection of a blend of UVLCURE 140 and TR-TCM218 of sartomer as the cycloaliphatic epoxy resin enables formulation tuning based on the actual situation.
The active monomer is EM3060-T of Changxing chemistry. The viscosity of the insulating coating system can be adjusted based on the characteristics of low viscosity and good dilution effect of the movable monomer so as to facilitate application and construction; meanwhile, the active monomer can also participate in polymerization reaction, so that the problem of environmental pollution caused by volatilization is avoided;
the cationic photoinitiator is Omnicat 320 of IMG. The cationic photoinitiator is used for initiating the alicyclic epoxy resin to carry out polymerization reaction, and can continue to polymerize and crosslink to carry out post-curing after the curing light is stopped, so that the curing of the thick coating is facilitated;
the wetting dispersant is EFKA-4010 of the Ephraim. The wetting and dispersing agent can improve the wettability of the alicyclic epoxy resin and the active monomer to the powder materials such as fumed silica and quartz powder, further improve the dispersibility of the alicyclic epoxy resin and the active monomer to the powder materials, improve the grinding efficiency, fully and uniformly grind the powder materials in the insulating coating, and ensure the uniformity of the thickness of the coating film, thereby ensuring the insulating effect of the coating;
the photosensitive sensitizer is TR-PSS-205 of a strong new material. The light absorption efficiency of the photoinitiator is improved based on the photosensitive sensitizer, so that the reaction rate is improved, the full curing of the coating is ensured, and the performances of the paint film in all aspects are ensured;
the fumed silica is a380 of desilication. Based on the characteristic of good thixotropic property of the fumed silica, the problem that the paint film is uneven due to sagging of the coating in the construction process can be effectively prevented, so that the insulativity of the paint film is reduced; meanwhile, the fumed silica has insulativity, so that the insulativity of the coating is further improved;
the quartz powder is Silverbond 925 of Sibiricaceae. Based on the characteristic of good insulation of the quartz powder, the insulation of the coating can be further improved, and meanwhile, the volume shrinkage of a paint film during curing can be reduced by utilizing the quartz powder, so that the shrinkage stress of the paint film is further reduced, and the adhesive force of the paint film is improved; in other embodiments, the quartz powder may be replaced with an insulating filler such as ceramic powder, glass powder, alumina, silica, or the like.
In the embodiment, the insulating coating is cured by adopting a cationic photoinitiator curing system, and the coating can be leveled and cured only under the normal temperature (3-5 minutes of baking at 40-60 ℃), so that the shrinkage rate is low, the shrinkage stress is small, the energy consumption is low, the thickness of a paint film sprayed at one time can reach 80 micrometers, the voltage resistance of the coating is greatly improved, meanwhile, the cationic photoinitiator can still ensure good adhesive force of the coating to a substrate after curing, so that the insulating material has excellent adhesive force and voltage resistance, and in addition, the insulating coating does not contain volatile solvents based on the characteristics of active monomers, so that the problem of environmental pollution does not exist.
As shown in fig. 1, the invention also provides a preparation method of the insulating paint for the new energy automobile battery, which is used for preparing the insulating paint for the new energy automobile battery and at least comprises the following steps:
s1, adding an active monomer, a cationic photoinitiator and a photosensitive sensitizer into a dispersing kettle, and dispersing for 10-20 minutes at a rotating speed of 800-1200 rpm until the cationic photoinitiator and the photosensitive sensitizer are completely dissolved in the active monomer;
s2, adding alicyclic epoxy resin and a wetting dispersant into the dispersing kettle in the step S1, dispersing for 10-20 minutes at a rotating speed of 800-1200 rpm to enable the wetting dispersant to be fully and uniformly dispersed, adding fumed silica and quartz powder while stirring, and dispersing for 20-30 minutes at a rotating speed of 800-1200 rpm;
s3, transferring the mixture dispersed in the step S2 into a grinder for grinding until the fineness is less than or equal to 20 mu m, and obtaining the insulating coating for the new energy automobile battery.
In the embodiment, firstly, a cationic photoinitiator and a photosensitive sensitizer are dissolved and dispersed in an active monomer, then alicyclic epoxy resin and a wetting dispersant are added and fully dispersed to be uniform, and finally, a grinding machine is utilized to grind the uniformly dispersed mixture until the required fineness is achieved, so that the insulating coating can be obtained; the specific technical effects of the prepared insulating coating are described in detail above and will not be described here again.
The invention also provides an application of the insulating paint for the new energy automobile battery, wherein the insulating paint for the new energy automobile battery or the insulating paint for the new energy automobile battery prepared by the insulating paint is applied to the new energy automobile battery, and the application specific process is as follows: the prepared insulating paint is coated on the outer surface of the workpiece of the new energy automobile battery by adopting an air spraying mode, baked for 3 to 5 minutes at the temperature of between 40 and 60 ℃, and then transferred into a UV furnace to be used for 5000 to 8000mJ/cm 2 Wherein the thickness of the coating layer of the insulating paint during air spraying is 60-70 μm.
In the embodiment, firstly, the insulating paint is coated on the outer surface of the workpiece, baked for 3-5 minutes in an infrared heating furnace (a special IR furnace of a paint spraying line body) at 40-60 ℃, and then transferred to a UV furnace for normal-temperature energy curing, namely, the insulating paint for the new energy automobile battery or the prepared insulating paint for the new energy automobile battery is applied to the new energy automobile battery, and the curing of the insulating paint can be realized only under the condition of normal temperature, so that the energy consumption is low; and the insulating coating has excellent adhesive force performance and voltage resistance performance on a new energy automobile battery based on the characteristics of high adhesive force and high film thickness of the insulating coating.
In order to further understand the working principle and the effective technical effects of the present invention, three examples and three comparative examples are described below.
For convenience of description, the proportions of examples and comparative examples and their product properties are expressed in the following three tables, respectively: table 1: raw material weight percent proportioning tables of comparative examples 1-2 and examples 1-3; table 2: the weight percentage ratio table of the raw materials of the comparative example 3; table 3: the performance test results of the insulating coatings prepared based on the proportions of the comparative example and the example are shown in the table.
Table 1 weight percent ratios of raw materials for comparative and example
| Composition type | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Alicyclic epoxy resin 1 | 20 | 20 | 20 | 20 | 28 |
| Alicyclic epoxy resin 2 | 20 | 20 | 20 | 20 | 28 |
| Reactive monomers | 29.3 | 29.3 | 19.3 | 29.3 | 29.3 |
| Cationic photoinitiators | 4 | 4 | 4 | 4 | 4 |
| Photosensitive sensitizer | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Wetting dispersant | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Fumed silica | 6 | 6 | 6 | 6 | 0 |
| Quartz powder | 20 | 20 | 30 | 20 | 10 |
Comparative example 3
The cycloaliphatic epoxy resin of the examples was replaced with an acrylate resin 6363 of Changxing chemistry, the amounts of acrylate resin 6363 and its components being as follows:
table 2 weight percent of raw materials proportioning table of comparative example 3
| Material | Model number | Additive amount |
| Acrylic ester resin | 6363 (Changxing chemistry) | 40 |
| / | / | / |
| Reactive monomers | EM3060-T (Changxing chemical) | 29.3 |
| Photoinitiator | Omnirad 1173（IMG） | 4 |
| Photosensitive sensitizer | TR-PSS-205 (Strong new material) | 0.2 |
| Wetting dispersant | EFKA-4010 (Eiff card) | 0.5 |
| Fumed silica | A380 (De Gu Sai) | 6 |
| Quartz powder | Silverbond 925 (Sibiricaceae) | 20 |
The insulating coatings prepared in the above examples and comparative examples were subjected to performance test, respectively, and the specific results are shown in table 3.
Table 3: performance test results table of insulating coatings prepared based on the ratios of comparative examples and examples
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Adhesion force | 100/100 | 100/100 | 100/100 | 100/100 | 100/100 | 0/100 |
| RCA abrasion resistance | 800 times | 850 times | 1000 times | 600 times | 700 times | 500 times |
| Hardness of | OK | OK | OK | OK | OK | OK |
| Insulation (withstand voltage) | 22KV | 21KV | 29KV | 10KV | 18KV | 15KV |
| Test of resistance to moist Heat | OK | OK | OK | OK | OK | NG |
| Chemical resistance test | OK | OK | OK | OK | OK | OK |
Wherein the paint film thickness of each of the example 1, the example 2, the example 3, the comparative example 2 and the comparative example 3 is controlled to be 60-70 micrometers, the paint film thickness of the comparative example 1 is controlled to be 40-50 micrometers, and specific indexes of the performance test comprise:
1. adhesion force: the adhesive force test is carried out according to the method specified in GB/T9826, wherein 100/100 is that 10 x 10 grids are marked on the coating, and no coating falls off from 100 grids after the test;
2. RCA abrasion resistance: RCA paper bag abrasion tester (Norman Tool RCA Abrader), 175g load, record paint film abrasion times. The sample and grinding media were placed under an environment of about 23.+ -. 2 ℃ and about 50.+ -. 10% relative humidity for 24 hours prior to testing.
3. Hardness: pencil hardness tester. Japanese mitsubishi pencil, H, 750g.
4. Insulation properties: according to the method specified in GB1408.1-2006, a GJW-50KV voltage breakdown tester from Changchun City Intelligent Instrument Equipment Co., ltd was used for the test.
5. Wet heat resistance test: placing in a constant temperature and humidity box, and keeping at 85deg.C and 85% humidity for 1000 hr without cracking, foaming, color change, and paint drop.
6. And (3) chemical resistance test, namely coating the surface of a paint film with Vaseline, placing the paint film in a constant temperature and humidity box (the temperature is 85 ℃ and the humidity is 85%) for 96 hours, taking out the paint film, wiping the paint film with a rag, and observing whether the paint film has the phenomena of color change, foaming, color change, paint dropping and the like.
Based on tables 1, 2 and 3,
comparison of comparative example 1 with example 1 and example 2 shows that: the thickness of the paint film is reduced, so that the voltage resistance of the paint film is greatly reduced, the insulation property of the coating is obviously improved by increasing the thickness of the paint film, and the wear resistance of the coating is also improved.
Comparative example 2 is compared with example 1 and example 2: the absence of fumed silica causes sagging of the paint film, which results in uneven film thickness of the paint film and reduced insulation.
Comparative example 3 is compared with example 1 and example 2: the insulativity of the alicyclic epoxy resin curing system initiated by the cationic photoinitiator is superior to that of the free radical curing system, and the adhesive force on the aluminum alloy material is obviously superior to that of the free radical curing system.
Comparison of example 3 with example 1 and example 2 shows that: the insulation property of the coating can be obviously improved by adding the quartz powder, and the wear resistance of a paint film can be improved.
Therefore, the insulating coating adopts the cationic photoinitiator to trigger the alicyclic epoxy resin to carry out polymerization reaction, and UV curing is carried out at normal temperature, thus having the characteristics of high efficiency, energy conservation and environmental protection, and because the alicyclic epoxy resin has low curing shrinkage rate and small shrinkage stress, the adhesive force of the coating to the base material can be ensured under the condition of high film thickness, the insulativity of the alicyclic epoxy resin is good, the thickness of a paint film sprayed once by the insulating paint can reach 80 microns, and the insulativity of the insulating paint coating is greatly improved; in addition, the insulating coating does not contain volatile solvents based on the characteristics of the active monomers, so that the problem of environmental pollution is avoided; by combining the cationic photo-curing technique with the insulating coating, the shrinkage rate of the cationic photo-curing coating is lower than that of the free radical curing coating, so that the adhesive force of the coating to the substrate is ensured under the condition that the insulating property of the coating of the insulating coating is improved by the high film thickness.
The insulating paint for the new energy automobile battery and the preparation method thereof are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the invention. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (6)
1. The application of the insulating paint for the new energy automobile battery is characterized in that the insulating paint comprises the following components in parts by weight:
30-50 parts of alicyclic epoxy resin
20-40 parts of active monomer
5-8 parts of fumed silica
10-30 parts of quartz powder
Wetting dispersant 0.2-1 parts
3-5 parts of cationic photoinitiator
0.1-0.5 part of photosensitive sensitizer;
wherein the alicyclic epoxy resin is a combination of UVLCURE 140 and TR-TCM218 of sartomer, and the mass ratio of the UVLCURE 140 to the TR-TCM218 in the combination is 1:1;
the fumed silica is a380 of desilication;
the quartz powder is Silverbond 925 of the Sibiricaceae;
the specific application process of the insulating paint comprises the following steps: the prepared insulating paint is coated on the outer surface of the workpiece of the new energy automobile battery by adopting an air spraying mode, baked for 3 to 5 minutes at the temperature of between 40 and 60 ℃, and then transferred into a UV furnace to be used for 5000 to 8000mJ/cm 2 Wherein the thickness of the coating layer of the insulating paint during air spraying is 60-70 μm.
2. The use of an insulating coating for a battery of a new energy vehicle according to claim 1, wherein the reactive monomer is EM3060-T of the changxiang chemistry.
3. The use of an insulating coating for a battery of a new energy automobile as claimed in claim 2, wherein the cationic photoinitiator is Omnicat 320 of IMG.
4. The use of an insulating coating for a battery of a new energy automobile as claimed in claim 3, wherein the wetting dispersant is EFKA-4010 of epv card.
5. The use of an insulating coating for a battery of a new energy automobile as claimed in claim 4, wherein the photosensitizing agent is TR-PSS-205 of a strong new material.
6. A method for preparing an insulating coating for a new energy automotive battery, characterized in that it is used for preparing an insulating coating for use according to any one of claims 1-5, comprising the steps of:
s1, adding an active monomer, a cationic photoinitiator and a photosensitive sensitizer into a dispersing kettle, and dispersing for 10-20 minutes at a rotating speed of 800-1200 rpm until the cationic photoinitiator and the photosensitive sensitizer are completely dissolved in the active monomer;
s2, adding alicyclic epoxy resin and a wetting dispersant into the dispersing kettle in the step S1, dispersing for 10-20 minutes at a rotating speed of 800-1200 rpm to enable the wetting dispersant to be fully and uniformly dispersed, adding fumed silica and quartz powder while stirring, and dispersing for 20-30 minutes at a rotating speed of 800-1200 rpm;
s3, transferring the mixture dispersed in the step S2 into a grinder for grinding until the fineness is less than or equal to 20 mu m, and obtaining the insulating coating for the new energy automobile battery.
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| CN202310010428.3A CN115806764B (en) | 2023-01-05 | 2023-01-05 | Insulating paint for new energy automobile battery and preparation method thereof |
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| CN115806764B true CN115806764B (en) | 2023-11-14 |
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| CN116948486A (en) * | 2023-06-08 | 2023-10-27 | 华森电气(山东)有限公司 | Weather-resistant heat-conducting self-curing insulating paint for power equipment and use method |
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| CN107936746A (en) * | 2017-11-28 | 2018-04-20 | 中科院广州化学有限公司南雄材料生产基地 | A kind of organic-silicon-modified cation photocuring cycloaliphatic epoxy resin coating and its application |
| CN112920680A (en) * | 2021-01-29 | 2021-06-08 | 江苏泰特尔新材料科技股份有限公司 | Preparation method of photosensitive resin composition and preparation method of photocuring coating |
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Effective date of registration: 20231220 Address after: Room 101, No. 777 Third Ring North Road, Economic Development Zone, Ningxiang County, Changsha City, Hunan Province, 410000 Patentee after: Hunan Sandi Digital Coating System Co.,Ltd. Address before: No. 777, North Third Ring Road, Ningxiang Economic Development Zone, Changsha, Hunan 410000 Patentee before: HUNAN SOKAN NEW MATERIALS Co.,Ltd. |