Ultraviolet photocureable coating and preparation method thereof

Abstract

The invention provides an ultraviolet photocureable coating and a preparation method thereof, and relates to the technical field of photocureable coatings, the ultraviolet photocureable coating comprises the following raw materials by weight: 35% of a polymer base material, 10% of a photoinitiator, 25% of a coating base material, 15% of an additive, 10% of a solvent, and 5% of a filler, the coating comprises a base material composed of allyl acrylate and polyacrylate, under the action of auxiliaries such as a 2-hydroxy-2-methyl-1-phenyl-1-acetone photoinitiator, rapid curing and thorough reaction can be achieved through ultraviolet irradiation, a coating film with a cross-linked grid structure can be formed, the coating film can be widely applied to surface coating of various plates, and in addition, the coating film has the advantages of being simple in preparation process, low in cost and easy to popularize and apply. Due to the antistatic agent, the preservative and the anti-UV agent, the overall use performance of the coating is improved.

Description

Technical Field

[0001] The invention relates to the technical field of photocurable coatings, and in particular to an ultraviolet light-curable coating and a preparation method thereof. Background Art

[0002] Photocurable coatings mainly refer to a new type of coating that can be rapidly cross-linked and cured to form a film under ultraviolet light. Due to its rapid curing and environmentally friendly characteristics, it has been recognized by the world's coatings industry and most regulatory agencies. Since its commercialization, photocurable coatings have been expanded from being used only for wood coatings to being widely used in a variety of substrates such as plastics, paper, metals, and ceramics.

[0003] Traditional light-curing paint is applied to the outside of the equipment. Although it can cure quickly, if the equipment is exposed to sunlight during use, the pigment in the paint will easily denature and turn yellow, affecting the appearance. Summary of the invention

[0004] The purpose of the present invention is to solve the disadvantage in the prior art that when the coating is exposed to sunlight, the pigment in the coating is easily denatured and turns yellow, which affects the appearance.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a UV light-curing coating, composed of the following raw materials in weight percentage: 8-12% of a photoinitiator, 22-28% of a coating base, 14-16% of an additive, 8-12% of a solvent, 4-7% of a filler, and the balance being a polymer base.

[0006] In at least some embodiments, the polymer binder is allyl acrylate.

[0007] In at least some embodiments, the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone.

[0008] In at least some embodiments, the coating base is polyacrylate.

[0009] In at least some embodiments, the additives are composed of an antistatic agent, a preservative, and an anti-UV agent in a ratio of 3:2:1.

[0010] In at least some embodiments, the antistatic agent is ammonium sulfate, sodium sulfate and potassium sulfate, the preservative is 5-chloro-2-methyl-4-isothiazoline-3-one and / or 2-methyl-4-isothiazoline-3-one, and the anti-UV agent is benzophenone, oxybenzophenone, and DL-camphorquinone.

[0011] In at least some embodiments, the solvent is a mixed solution of ethylene glycol and propylene glycol in a ratio of 1:1.

[0012] In at least some embodiments, the filler is silicic acid.

[0013] A method for preparing an ultraviolet light-curing coating, the method comprising: S1: Add the polymer base material and the photoinitiator into the solvent and stir for 5-10 minutes to mix, and heat to 60-100°C to mix evenly; S2: Add coating base, additives and fillers and stir for 10-20 minutes before mixing; S3: pre-treating the mixed material to remove impurities and bubbles to improve the quality of the coating and the light curing performance; S4: exposing the coating material to ultraviolet light for 1-5 minutes, within a wavelength range of 200-400 nm, to initiate a photocuring reaction.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are: The present invention provides an external light curing coating and a preparation method thereof. The coating comprises a base material composed of allyl acrylate and polyacrylate, and can be rapidly cured by ultraviolet light irradiation under the action of auxiliary agents such as 2-hydroxy-2-methyl-1-phenyl-1-propanone photoinitiator, and the reaction is thorough to form a coating film with a cross-linked grid structure, which can be widely used for surface coating of various plates. In addition, the overall performance of the coating is improved by the addition of antistatic agents, preservatives and anti-UV agents. DETAILED DESCRIPTION

[0015] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0016] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0017] An ultraviolet light-curing coating is composed of the following raw materials in percentage by weight: 8-12% of a photoinitiator, 22-28% of a coating base material, 14-16% of an additive, 8-12% of a solvent, 4-7% of a filler, and the balance being a polymer base material.

[0018] The polymer base material is allyl acrylate. As a base material of synthetic resins, allyl acrylate has excellent physical and chemical properties and lower production cost.

[0019] The photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone, which is a highly efficient photosensitive initiator that can absorb energy of a certain wavelength to generate free radicals, cations, etc., thereby initiating monomer polymerization, cross-linking and curing.

[0020] The base material of the coating is polyacrylate, which is a homopolymer or copolymer with acrylate as monomer. Acrylate polymerizes under the action of light, heat and initiator.

[0021] The additive consists of an antistatic agent, a preservative and an anti-UV agent in a ratio of 3:2:1. The antistatic agent is ammonium sulfate, sodium sulfate and potassium sulfate. The preservative is 5-chloro-2-methyl-4-isothiazoline-3-one and / or 2-methyl-4-isothiazoline-3-one. The anti-UV agent is benzophenone, oxybenzophenone and DL-camphorquinone. The addition of benzophenone, oxybenzophenone and DL-camphorquinone is used for UVB absorption and for preventing pigment degeneration and yellowing in the coating.

[0022] The solvent is a mixed solution of ethylene glycol and propylene glycol in a ratio of 1:1. The addition of ethylene glycol and propylene glycol improves the freeze-thaw stability of the coating, prevents the coating from freezing at low temperatures, and ensures the normal use of the coating in winter.

[0023] The filler is silicate. The addition of silicate to the coating ensures that the internal moisture can evaporate freely to the outside, effectively preventing bubbles from forming in the coating and preventing water from penetrating the breathable coating.

[0024] A method for preparing an ultraviolet light-curing coating comprises: S1: Add the polymer base material and the photoinitiator into the solvent and stir for 5-10 minutes to mix, and heat to 60-100°C to mix evenly; S2: Add coating base, additives and fillers and stir for 10-20 minutes before mixing; S3: pre-treating the mixed material to remove impurities and bubbles to improve the quality of the coating and the light curing performance; S4: exposing the coating material to ultraviolet light for 1-5 minutes, within a wavelength range of 200-400 nm, to initiate a photocuring reaction.

[0025] Embodiment 1 An ultraviolet light-curing coating is composed of the following raw materials in percentage by weight: 35% of a polymer base material, 10% of a photoinitiator, 25% of a coating base material, 15% of an additive, 10% of a solvent, and 5% of a filler.

[0026] The polymer base material is allyl acrylate. As a base material of synthetic resins, allyl acrylate has excellent physical and chemical properties and lower production cost.

[0027] The photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone, which is a highly efficient photosensitive initiator that can absorb energy of a certain wavelength to generate free radicals, cations, etc., thereby initiating monomer polymerization, cross-linking and curing.

[0028] The base material of the coating is polyacrylate, which is a homopolymer or copolymer with acrylate as monomer. Acrylate polymerizes under the action of light, heat and initiator.

[0029] The additive consists of an antistatic agent, a preservative and an anti-UV agent in a ratio of 3:2:1. The antistatic agent includes ammonium sulfate, sodium sulfate and potassium sulfate in a mass ratio of 1:1:1. The preservative includes 5-chloro-2-methyl-4-isothiazoline-3-one and 2-methyl-4-isothiazoline-3-one in a mass ratio of 1:1. The anti-UV agent includes benzophenone, oxybenzophenone and DL-camphorquinone in a mass ratio of 1:1:1. The addition of benzophenone, oxybenzophenone and DL-camphorquinone is used for UVB absorption, so as to prevent pigment degeneration and yellowing in the coating.

[0030] The solvent is a mixed solution of ethylene glycol and propylene glycol in a ratio of 1:1. The addition of ethylene glycol and propylene glycol improves the freeze-thaw stability of the coating, prevents the coating from freezing at low temperatures, and ensures the normal use of the coating in winter.

[0031] The filler is silicate. The addition of silicate to the coating ensures that the internal moisture can evaporate freely to the outside, effectively preventing bubbles from forming in the coating and preventing water from penetrating the breathable coating.

[0032] A method for preparing an ultraviolet light-curing coating comprises: S1: Add the polymer base material and the photoinitiator into the solvent and stir for 5 minutes, and heat to 60°C to improve the fluidity and mixing uniformity of the mixture; S2: Add the coating base, additives and fillers and stir for 10 minutes before mixing; S3: pre-treating the mixed material to remove impurities and bubbles to improve the quality of the coating and the light curing performance; S4: Expose the coating material to ultraviolet light for 1 min, within a wavelength range of 200, to initiate a photocuring reaction.

[0033] Embodiment 2 An ultraviolet light-curing coating is composed of the following raw materials in percentage by weight: 8% of a photoinitiator, 22% of a coating base material, 14% of an additive, 8% of a solvent, 4% of a filler, and the balance being a polymer base material.

[0034] The polymer base material is allyl acrylate. As a base material of synthetic resins, allyl acrylate has excellent physical and chemical properties and lower production cost.

[0035] The photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone, which is a highly efficient photosensitive initiator that can absorb energy of a certain wavelength to generate free radicals, cations, etc., thereby initiating monomer polymerization, cross-linking and curing.

[0036] The base material of the coating is polyacrylate, which is a homopolymer or copolymer with acrylate as monomer. Acrylate polymerizes under the action of light, heat and initiator.

[0037] The additive consists of an antistatic agent, a preservative and an anti-UV agent in a ratio of 3:2:1. The antistatic agent includes ammonium sulfate, sodium sulfate and potassium sulfate in a mass ratio of 1:1:1. The preservative includes 5-chloro-2-methyl-4-isothiazoline-3-one and 2-methyl-4-isothiazoline-3-one in a mass ratio of 1:1. The anti-UV agent includes benzophenone, oxybenzophenone and DL-camphorquinone in a mass ratio of 1:1:1. The addition of benzophenone, oxybenzophenone and DL-camphorquinone is used for UVB absorption, so as to prevent pigment degeneration and yellowing in the coating.

[0038] The solvent is a mixed solution of ethylene glycol and propylene glycol in a ratio of 1:1. The addition of ethylene glycol and propylene glycol improves the freeze-thaw stability of the coating, prevents the coating from freezing at low temperatures, and ensures the normal use of the coating in winter.

[0039] The filler is silicate. The addition of silicate to the coating ensures that the internal moisture can evaporate freely to the outside, effectively preventing bubbles from forming in the coating and preventing water from penetrating the breathable coating.

[0040] A method for preparing an ultraviolet light-curing coating comprises: S1: Add the polymer base material and the photoinitiator into the solvent and stir for 5 minutes, and heat to 60°C to improve the fluidity and mixing uniformity of the mixture; S2: Add the coating base, additives and fillers and stir for 10 minutes before mixing; S3: pre-treating the mixed material to remove impurities and bubbles to improve the quality of the coating and the light curing performance; S4: Expose the coating material to ultraviolet light for 1 min, within a wavelength range of 200, to initiate a photocuring reaction.

[0041] Embodiment 3 An ultraviolet light-curing coating is composed of the following raw materials in percentage by weight: 12% of a photoinitiator, 28% of a coating base material, 16% of an additive, 12% of a solvent, 7% of a filler, and the balance being a polymer base material.

[0042] The polymer base material is allyl acrylate. As a base material of synthetic resins, allyl acrylate has excellent physical and chemical properties and lower production cost.

[0043] The photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone, which is a highly efficient photosensitive initiator that can absorb energy of a certain wavelength to generate free radicals, cations, etc., thereby initiating monomer polymerization, cross-linking and curing.

[0044] The base material of the coating is polyacrylate, which is a homopolymer or copolymer with acrylate as monomer. Acrylate polymerizes under the action of light, heat and initiator.

[0045] The additive consists of an antistatic agent, a preservative and an anti-UV agent in a ratio of 3:2:1. The antistatic agent includes ammonium sulfate, sodium sulfate and potassium sulfate in a mass ratio of 1:1:1. The preservative includes 5-chloro-2-methyl-4-isothiazoline-3-one and 2-methyl-4-isothiazoline-3-one in a mass ratio of 1:1. The anti-UV agent includes benzophenone, oxybenzophenone and DL-camphorquinone in a mass ratio of 1:1:1. The addition of benzophenone, oxybenzophenone and DL-camphorquinone is used for UVB absorption, so as to prevent pigment degeneration and yellowing in the coating.

[0046] The solvent is a mixed solution of ethylene glycol and propylene glycol in a ratio of 1:1. The addition of ethylene glycol and propylene glycol improves the freeze-thaw stability of the coating, prevents the coating from freezing at low temperatures, and ensures the normal use of the coating in winter.

[0047] The filler is silicate. The addition of silicate to the coating ensures that the internal moisture can evaporate freely to the outside, effectively preventing bubbles from forming in the coating and preventing water from penetrating the breathable coating.

[0048] A method for preparing an ultraviolet light-curing coating comprises: S1: Add the polymer base material and the photoinitiator into the solvent and stir for 5 minutes, and heat to 60°C to improve the fluidity and mixing uniformity of the mixture; S2: Add the coating base, additives and fillers and stir for 10 minutes before mixing; S3: pre-treating the mixed material to remove impurities and bubbles to improve the quality of the coating and the light curing performance; S4: Expose the coating material to ultraviolet light for 1 min, within a wavelength range of 200, to initiate a photocuring reaction.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A UV light curing coating, characterized in that: The invention is composed of the following raw materials in percentage by weight: 8-12% of a photoinitiator, 22-28% of a coating base material, 14-16% of an additive, 8-12% of a solvent, 4-7% of a filler, and the balance being a polymer base material.

2. The ultraviolet light curing coating according to claim 1, characterized in that: The polymer base material is allyl acrylate.

3. The ultraviolet light curing coating according to claim 1, characterized in that: The photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone.

4. The ultraviolet light curing coating according to claim 1, characterized in that: The coating base material is polyacrylate.

5. The ultraviolet light curing coating and the preparation method thereof according to claim 1, characterized in that: The additives consist of an antistatic agent, a preservative and an anti-UV agent, and the ratio is 3:2:

1.

6. The ultraviolet light curing coating and the preparation method thereof according to claim 5, characterized in that: The antistatic agent is ammonium sulfate, sodium sulfate and potassium sulfate, the preservative is 5-chloro-2-methyl-4-isothiazoline-3-one and / or 2-methyl-4-isothiazoline-3-one, and the anti-UV agent is benzophenone, oxybenzophenone and DL-camphorquinone.

7. The ultraviolet light curing coating according to claim 1, characterized in that: The solvent is a mixed solution of ethylene glycol and propylene glycol in a ratio of 1:

1.

8. The ultraviolet light curing coating according to claim 1, characterized in that: The filler is silicic acid.

9. A method for preparing the ultraviolet light-curing coating according to any one of claims 1 to 8, characterized in that: The preparation method comprises: S1: Add the polymer base material and the photoinitiator into the solvent and stir for 5-10 minutes to mix, and heat to 60-100°C to mix evenly; S2: Add coating base, additives and fillers and stir for 10-20 minutes before mixing; S3: pre-treating the mixed material to remove impurities and bubbles to improve the quality of the coating and the light curing performance; S4: exposing the coating material to ultraviolet light for 1-5 minutes, within a wavelength range of 200-400 nm, to initiate a photocuring reaction.