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CN-122011926-A - UV insulating coating, preparation method and application

CN122011926ACN 122011926 ACN122011926 ACN 122011926ACN-122011926-A

Abstract

The application discloses a UV insulating coating, a preparation method and application thereof, and belongs to the technical field of coatings. The UV insulating coating comprises polyurethane acrylic ester, a single-functionality acrylic acid monomer, a tri-functionality acrylic acid monomer, a leveling agent, a rheological additive, an inorganic filler, a photoinitiator, toner, a dispersing agent and an adhesion promoter, wherein the single-functionality acrylic acid monomer can provide good adhesion, flexibility and chemical resistance, the curing speed of the tri-functionality acrylic acid monomer is high, good weather resistance, water resistance and chemical resistance can be provided, the polyurethane acrylic ester is the most main film forming substance of the coating, and therefore, the polyurethane acrylic ester, the single-functionality acrylic acid monomer and the tri-functionality acrylic acid monomer are compounded and then are synergistic with other components, so that the coating can have excellent insulating performance and mechanical performance at the same time after being cured, and the integrity and reliability of an insulating structure can be maintained under external force impact, thereby providing durable and stable insulating protection for a battery.

Inventors

  • Gu Huangfei
  • YU ZHIYING
  • YANG HAO
  • CHI PING

Assignees

  • 上海飞凯材料科技股份有限公司

Dates

Publication Date
20260512
Application Date
20251226

Claims (11)

  1. 1. The UV insulating coating is characterized by comprising the following components in parts by mass: 35-45 parts of polyurethane acrylic ester, 30-40 parts of monofunctional acrylic monomer, 5-15 parts of trifunctional acrylic monomer, 0.1-0.5 part of leveling agent, 0.5-1 part of rheological additive, 5-10 parts of inorganic filler, 3-10 parts of photoinitiator, 1.5-3 parts of toner, 0.1-0.5 part of dispersing agent and 1-5 parts of adhesion promoter.
  2. 2. The UV-insulating coating according to claim 1, wherein the urethane acrylate is selected from at least one of a difunctional urethane-modified acrylic resin and a trifunctional urethane-modified acrylic resin.
  3. 3. The UV-insulating coating according to claim 2, wherein the viscosity of the difunctional polyurethane-modified acrylic resin and the trifunctional polyurethane-modified acrylic resin is 5000 mPa-s to 30000 mPa-s.
  4. 4. The UV-insulating coating according to claim 3, wherein the difunctional polyurethane-modified acrylic resin is selected from at least one of LuCure 5882 of the wetting chemistry, CN981NS of the sandomax chemistry, 6123 of the chang chemistry, 61128 of the chang chemistry; the trifunctional polyurethane modified acrylic resin is selected from CN989NS of saromon and DR-U268 of Changxing chemistry.
  5. 5. The UV-insulating coating according to claim 1, wherein the monofunctional acrylic monomer is at least one selected from the group consisting of isobornyl acrylate, hydroxyethyl methacrylate, N-dimethylacrylamide, lauryl acrylate, cyclo-trimethylol propane methylacrylate, 4-t-butylcyclohexyl acrylate, acryloylmorpholine, 2-phenoxyethyl acrylate.
  6. 6. The UV-insulating coating according to claim 1, wherein the trifunctional acrylic monomer is selected from at least one of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane triacrylate, pentaerythritol triacrylate.
  7. 7. The UV-insulating coating according to claim 1, wherein the mass ratio of the monofunctional acrylic monomer to the trifunctional acrylic monomer is (5.5-7.2): 1.
  8. 8. The UV-insulating coating according to claim 1, wherein the photoinitiator is selected from at least one of 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, bis (2, 4, 6-trimethylbenzoyl) phenyl phosphine oxide, ethyl p-dimethylaminobenzoate, 1-hydroxycyclohexylphenyl ketone, 2-isopropylthioxanthone, 2,4, 6-trimethylbenzoyl-bis (p-tolyl) phosphine oxide, 2-methyl-1- (4-methylthiophenyl) -2-morpholino-1-propanone.
  9. 9. The UV-insulating paint according to claim 1, wherein the inorganic filler is at least one selected from talc, sericite, and fine silica powder; the dispersing agent is at least one of BYK-110, BYK-160, BYK-190, 755W of Digao chemistry and KMT-3003 of Kening chemistry; The toner is at least one selected from titanium white, phthalocyanine blue, baby blue, deep blue and phthalocyanine green; The rheological aid is selected from at least one of BYK gamite-7305, BYK gamite-1958 and OPTIMA of Aldama of Pick chemistry; The leveling agent is at least one selected from BYK-331, BYK-333, FLOW-100 of Akema, glide 410 of Digao chemistry and Modaflow 9200C of Zhan Xin; The adhesion promoter is at least one selected from 9051 of photo-chemical industry, TEGO 1300L of dihigh chemistry and PM-2 of Japanese chemical.
  10. 10. A method of preparing a UV-insulating coating according to any one of claims 1 to 9, comprising: Preparing color paste through toner and dispersant; uniformly mixing polyurethane acrylic ester, a monofunctional acrylic monomer and a trifunctional acrylic monomer to obtain a first mixed material; adding rheological additives and inorganic fillers into the first mixed material, and uniformly mixing to obtain a second mixed material; And adding a photoinitiator, a flatting agent, an adhesion promoter and the color paste into the second mixed material, and uniformly mixing to obtain the UV insulating coating.
  11. 11. Use of a UV-insulating coating in the cell housing of a battery, characterized in that the UV-insulating coating is as claimed in any one of claims 1 to 9.

Description

UV insulating coating, preparation method and application Technical Field The application relates to the technical field of coatings, in particular to a UV insulating coating, a preparation method and application. Background Currently, in order to ensure electrical safety, a blue film coating process is generally adopted for a battery core shell of a new energy automobile battery. The blue film is used as a common coating material, has the advantages of low cost, good chemical corrosion resistance, higher tensile strength and the like, and can provide a basic protection function for the battery cell. However, the coating mode still has certain defects in practical scale application, such as limited adhesive strength between the blue film and the surface of the battery cell shell, and interface peeling or cohesive failure phenomenon is easy to occur under the action of external mechanical stress or impact, so that the battery cell coating layer is invalid, the structural integrity of the battery cell is reduced, the insulation performance is possibly reduced, even the short circuit risk is possibly caused, and great potential safety hazards exist. Disclosure of Invention The embodiment of the application provides a UV insulating coating, a preparation method and application, wherein the coating can simultaneously have excellent insulating property and mechanical property after being cured, and can still keep the integrity and reliability of an insulating structure under the impact of external force, thereby providing durable and stable insulating protection for a battery. The technical scheme is as follows: on the one hand, the UV insulating coating comprises the following components in parts by mass: 35-45 parts of polyurethane acrylic ester, 30-40 parts of monofunctional acrylic monomer, 5-15 parts of trifunctional acrylic monomer, 0.1-0.5 part of leveling agent, 0.5-1 part of rheological additive, 5-10 parts of inorganic filler, 3-10 parts of photoinitiator, 1.5-3 parts of toner, 0.1-0.5 part of dispersing agent and 1-5 parts of adhesion promoter. In one possible implementation, the urethane acrylate is selected from at least one of a difunctional urethane-modified acrylic resin and a trifunctional urethane-modified acrylic resin. In another possible implementation, the viscosity of the difunctional polyurethane modified acrylic resin and the trifunctional polyurethane modified acrylic resin is 5000 mPa-s to 30000 mPa-s. In another possible implementation, the difunctional polyurethane modified acrylic resin is selected from at least one of LuCure 5882 of the wetting chemistry, CN981NS of sandomox, 6123 of the chang chemistry, 61128 of the chang chemistry; the trifunctional polyurethane modified acrylic resin is selected from CN989NS of saromon and DR-U268 of Changxing chemistry. In another possible implementation, the monofunctional acrylic monomer is selected from at least one of isobornyl acrylate, hydroxyethyl methacrylate, N-dimethylacrylamide, lauryl acrylate, cyclotrimethylol propane methylal acrylate, 4-t-butylcyclohexyl acrylate, acryloylmorpholine, 2-phenoxyethyl acrylate. In another possible implementation, the trifunctional acrylic monomer is selected from at least one of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane triacrylate, pentaerythritol triacrylate. In another possible implementation, the mass ratio of the monofunctional acrylic monomer to the trifunctional acrylic monomer is (5.5-7.2): 1. In another possible implementation, the photoinitiator is selected from at least one of 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, bis (2, 4, 6-trimethylbenzoyl) phenyl phosphine oxide, ethyl p-dimethylaminobenzoate, 1-hydroxycyclohexylphenyl ketone, 2-isopropylthioxanthone, 2,4, 6-trimethylbenzoyl-bis (p-tolyl) phosphine oxide, 2-methyl-1- (4-methylthiophenyl) -2-morpholino-1-propanone. In another possible implementation manner, the inorganic filler is at least one selected from talcum powder, sericite and silica micropowder; the dispersing agent is at least one of BYK-110, BYK-160, BYK-190, 755W of Digao chemistry and KMT-3003 of Kening chemistry; The toner is at least one selected from titanium white, phthalocyanine blue, baby blue, deep blue and phthalocyanine green; The rheological aid is selected from at least one of BYK gamite-7305, BYK gamite-1958 and OPTIMA of Aldama of Pick chemistry; The leveling agent is at least one selected from BYK-331, BYK-333, FLOW-100 of Akema, glide 410 of Digao chemistry and Modaflow 9200C of Zhan Xin; The adhesion promoter is at least one selected from 9051 of photo-chemical industry, TEGO 1300L of dihigh chemistry and PM-2 of Japanese chemical. In another aspect, there is provided a method for preparing a UV-insulating coating, the UV-insulating coating being as described in any one of the above, the method comprising: Preparing color paste through toner and dispersant; uniformly mixing polyurethane ac