阅读说明：本技术 一种辐射固化涂层的制备工艺、辐射固化涂层及其应用 (Preparation process of radiation curing coating, radiation curing coating and application thereof ) 是由 李新雄 李辉 刘士国 张冬明 于 2021-07-20 设计创作，主要内容包括：本发明公开了一种辐射固化涂层的制备工艺,包括以下步骤：(1)在载体薄膜上涂装辐射固化涂层A并进行辐射固化,得到预涂装膜；(2)在基板上涂装辐射固化涂层B,再将预涂装膜贴覆于上述辐射固化涂层B上,使预涂装膜的涂层面与辐射固化涂层B接触得到涂层前驱体；(3)将涂层前驱体进行辐射固化,去掉载体薄膜即得到所述辐射固化涂层。本发明还提供一种上述辐射固化涂层工艺制备得到的辐射固化涂层及其应用。本发明的制备工艺对施工环境宽容性强,无氧阻聚影响,未被载体薄膜消耗掉辐射固化能量,无机功能填料添加量不受限,镜面效果好,可制备得到耐微划伤达到B1级、耐交通划痕能达到C2级的镜面涂层,达到替代瓷砖、大理石的效果。(The invention discloses a preparation process of a radiation curing coating, which comprises the following steps: (1) coating a radiation curing coating A on the carrier film and performing radiation curing to obtain a pre-coating film; (2) coating a radiation curing coating B on a substrate, and then attaching a pre-coating film on the radiation curing coating B to enable the coating surface of the pre-coating film to be in contact with the radiation curing coating B to obtain a coating precursor; (3) and (3) carrying out radiation curing on the coating precursor, and removing the carrier film to obtain the radiation-cured coating. The invention also provides a radiation curing coating prepared by the radiation curing coating process and application thereof. The preparation process disclosed by the invention has the advantages of strong wide tolerance on construction environment, no oxygen inhibition influence, no consumption of radiation curing energy by a carrier film, no limitation on the addition amount of the inorganic functional filler, good mirror surface effect, capability of preparing a mirror surface coating with micro scratch resistance reaching B1 level and traffic scratch resistance reaching C2 level, and capability of replacing ceramic tiles and marble.)

1. A process for preparing a radiation-curable coating, comprising the steps of:

(1) coating a radiation curing coating A on the carrier film and performing radiation curing to obtain a pre-coating film;

(2) coating a radiation curing coating B on a substrate, and then attaching the pre-coating film in the step (1) on the radiation curing coating B to enable the coating surface of the pre-coating film to be in contact with the radiation curing coating B to obtain a coating precursor;

(3) and (3) carrying out radiation curing on the coating precursor in the step (2), and removing the carrier film to obtain the radiation-cured coating.

2. The manufacturing process according to claim 1, wherein the carrier film comprises one of a polyester film, a polypropylene film, or a polyethylene film; the thickness of the carrier film is 20-1000 μm.

3. The process according to claim 1, wherein the radiation-curable coating A is applied at a thickness of 1 to 20g/m²。

4. The process according to claim 1, wherein the radiation-curable coating B is applied in a thickness of 10 to 300g/m²。

5. The process of any one of claims 1-4, wherein the radiation-cured coating is subjected to a secondary radiation cure after removal of the carrier film.

6. The production process according to any one of claims 1 to 4, characterized in that an inorganic filler is added to the radiation-cured coating A and/or the radiation-cured coating B.

7. A radiation-curable coating prepared according to the process of any one of claims 1 to 6.

8. Use of a radiation-curable coating according to claim 7.

9. Use according to claim 8, wherein the radiation-curable coating is applied in the field of furniture, wall coverings; the radiation curing coating A is added with inorganic filler or the main resin of the radiation curing coating A comprises organic-inorganic hybrid nano modified resin; the inorganic filler comprises one or more of silica powder, glass powder or nepheline powder, the mass content of the inorganic filler in the radiation curing coating A is 1-50%, and the grain size of the inorganic filler is 1-100 μm; the organic-inorganic hybrid nano modified resin comprises nano alumina modified epoxy acrylic resin or polyurethane acrylic resin, and the mass content of the organic-inorganic hybrid nano modified resin in the radiation curing coating A is 5-80%.

10. Use according to claim 8, wherein the radiation-cured coating is applied in the field of floor materials; the radiation curing coating A is added with inorganic filler and/or the main resin of the radiation curing coating A comprises organic-inorganic hybrid nano modified resin; the inorganic filler comprises one or more of alumina, silicon carbide or diamond micropowder, the mass content of the inorganic filler in the radiation curing coating A is 1-50%, and the particle size of the inorganic filler is 1-100 μm; the organic-inorganic hybrid nano modified resin comprises nano alumina modified epoxy acrylic resin or polyurethane acrylic resin, and the mass content of the organic-inorganic hybrid nano modified resin in the radiation curing coating A is 5-80%;

the radiation curing coating B is at least provided with one layer, the radiation curing coating B is added with inorganic filler, the inorganic filler comprises one or more of alumina, silicon carbide or diamond micropowder, the mass content of the inorganic filler in the radiation curing coating B is 0-50%, and the particle size of the inorganic filler is 1-100 mu m.

Technical Field

The invention belongs to the field of building decoration materials, and particularly relates to a preparation process of a coating, the coating and application thereof.

Background

The coating can present various surface effects due to different surface forms and coating processes of the base material, and the mirror surface flattening effect is widely applied to the fields of decorative plates, furniture, floors, ceramic tiles, films and the like due to unique aesthetic feeling among different surface effects. Common coating techniques that can achieve mirror-smoothing effects include spray coating, laser roll coating, curtain coating, and film pressing. The spraying process has the defects of environmental pollution, complex operation, limited performance and the like; the laser roller coating and curtain coating process has high requirements on the coating, requires small viscosity, excellent defoaming property and good leveling property, and the obtained coating has low qualification rate and poor performance and can not obtain a matte mirror surface coating.

The conventional film pressing process controls the surface effect of the coating through the mirror film, has strong paint compatibility, can easily obtain a bright or matte coating with good mirror effect, high hardness and good strength, and has wide application prospect in the field (such as wallboards) with low requirements on wear resistance and scratch resistance. However, in the fields (such as furniture, floors, etc.) with higher requirements on wear resistance and scratch resistance, the coating needs to be added with an inorganic filler with higher hardness to achieve more excellent performance, but the addition of the inorganic filler can obviously affect the mirror effect of the film pressing process and reduce the product yield.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects and shortcomings in the background technology, and provide a preparation process of a radiation curing coating with excellent wear resistance, scratch resistance and good mirror surface effect and the radiation curing coating. In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a process for preparing a radiation-cured coating comprising the steps of:

(1) coating a radiation curing coating A on the carrier film and performing radiation curing to obtain a pre-coating film; the radiation curing can be fully cured or semi-cured;

(2) coating a radiation curing coating B (preferably not curing) on a substrate, and then attaching the pre-coating film in the step (1) on the radiation curing coating B to enable the coating surface (namely the non-carrier film side) of the pre-coating film to be in contact with the radiation curing coating B to obtain a coating precursor;

(3) and (3) carrying out radiation curing on the coating precursor in the step (2), and removing the carrier film to obtain the radiation-cured coating.

In the above production process, preferably, the carrier film includes one of a polyester film (PET film), a polypropylene film (PP film), and a polyethylene film (PE film). More preferably, the support film is a polyester film (PET film).

In the above production process, preferably, the carrier film includes one of a mirror film, a bright film, a matte film, or a textured film.

In the above preparation process, preferably, the thickness of the carrier film is 20 to 1000 μm. More preferably, the thickness of the carrier film is 50 to 200 μm. The thickness of the carrier film is determined taking into account film shrinkage and light transmission. The carrier film is too thin, has high light transmittance, but is easily shrunk to affect the surface effect. Too thick a carrier film, poor light transmittance, may affect the degree of curing. We prefer to show that the thickness of the carrier film is from 50 to 200 μm, which balances the two requirements.

In the above preparation process, preferably, the radiation-cured coating A is at least one coating, and the coating thickness of the radiation-cured coating A is 1-20g/m². More preferably, the coating thickness of the radiation-cured coating A is 2 to 20g/m². The radiation curing coating A can be a coating or a plurality of coatings, and the multi-coating can adopt a mode of one-time curing or one-time coating and then curing. The coating thickness of the radiation curing coating A needs to be accurately controlled, the coating thickness is too low, the requirement on equipment is high, the coating requirement is difficult to achieve, in addition, the UV coating can shrink when being cured, the coating amount is too thick, the film shrinkage can be large, and the surface effect is influenced. If miningWith thicker films, shrinkage of the film can be avoided, but light cannot penetrate through the film, which affects the curing degree.

In the above preparation process, preferably, the coating manner of the radiation-cured coating a includes one of roll coating, extrusion coating and spray coating. More preferably, the radiation-cured coating A is applied by roll coating.

In the above preparation process, preferably, the radiation-cured coating B is at least one coating, and the coating thickness of the radiation-cured coating B is 10-300g/m². More preferably, the radiation-curable coating B is applied in a thickness of 30 to 100g/m². The radiation curing coating B can be a single coating or a plurality of coatings, and the multi-coating can be realized by one-time curing or one-time coating and then curing. The thickness of the radiation curing coating B can be determined according to actual requirements, for example, if the coating is required to be good in wear resistance, the coating weight needs to be increased, and wear-resistant powder is added; if applied to fields without special wear resistance requirements, the coating weight can be less than 100g/m²。

In the above preparation process, preferably, the radiation curing is one or more of mercury lamp, gallium lamp, LED lamp and EB curing.

In the above preparation process, preferably, after the carrier film is removed, the radiation-cured coating is subjected to secondary radiation curing.

In the above preparation process, preferably, an inorganic filler is added to the radiation-cured coating a and/or the radiation-cured coating B. The wear resistance and the scratch resistance of the radiation curing coating can be greatly improved by adding the inorganic filler.

In the above preparation process, preferably, the inorganic filler includes one or more of silica powder, glass powder, nepheline powder, alumina, silicon carbide or diamond powder, the mass content of the inorganic filler in the radiation cured coating a is 1-50%, and the particle size of the inorganic filler is 1-100 μm.

In the above preparation process, preferably, the radiation-cured coating a comprises the following raw materials by weight: 20-90 parts of acrylic resin, 0-50 parts of reactive diluent, 1-5 parts of photoinitiator and 1-50 parts of inorganic filler; the radiation curing coating B comprises the following raw materials by weight: 20-90 parts of acrylic resin, 0-50 parts of reactive diluent, 1-5 parts of photoinitiator and 0-30 parts of inorganic filler.

As a general technical concept, the invention also provides a radiation curing coating prepared by the radiation curing coating process.

The present invention also provides, as a general technical concept, the use of the radiation curable coating described above.

In the above application, preferably, the radiation-curable coating is applied to the field of furniture and wall materials; the radiation curing coating A is ceramic glaze, namely, inorganic filler is added into the radiation curing coating A or the main resin of the radiation curing coating A comprises organic-inorganic hybrid nano modified resin; the inorganic filler comprises one or more of silica powder, glass powder or nepheline powder, the mass content of the inorganic filler in the radiation curing coating A is 1-50%, and the grain size of the inorganic filler is 1-100 μm; the organic-inorganic hybrid nano modified resin comprises nano alumina modified epoxy acrylic resin or polyurethane acrylic resin, and the mass content of the organic-inorganic hybrid nano modified resin in the radiation curing coating A is 5-80%.

In the above application, it is preferable that the radiation curable coating is applied to the field of floor materials; the radiation curing coating A is diamond glaze, namely, the radiation curing coating A is added with inorganic filler and/or the main resin of the radiation curing coating A comprises organic-inorganic hybrid nano modified resin; the inorganic filler comprises one or more of alumina, silicon carbide or diamond micropowder, the mass content of the inorganic filler in the radiation curing coating A is 1-50%, and the particle size of the inorganic filler is 1-100 μm; the organic-inorganic hybrid nano modified resin comprises nano alumina modified epoxy acrylic resin or polyurethane acrylic resin, and the mass content of the organic-inorganic hybrid nano modified resin in the radiation curing coating A is 5-80%; the radiation curing coating B is at least provided with one layer, the radiation curing coating B is added with inorganic filler, the inorganic filler comprises one or more of alumina, silicon carbide or diamond micropowder, the mass content of the inorganic filler in the radiation curing coating B is 0-50%, and the particle size of the inorganic filler is 1-100 mu m.

The following provides a preferred technical solution in combination with different application fields:

when the radiation curing coating is applied to the surfaces of common furniture and wall materials, such as doors, windows, cabinets, wallboards and the like, the inorganic filler in the radiation curing coating A is preferably inorganic powder particles, such as one or a combination of more of silica powder, glass powder and nepheline powder, the mass content of the inorganic filler is 1-50%, preferably 5-20%, and the particle size of the inorganic filler is 1-100 mu m, preferably 2-20 mu m, so that the radiation curing coating has good scratch resistance.

When the radiation curing coating is applied to the fields of furniture and wall material surfaces with high-end requirements, such as desks, experiment tables, chairs and the like, in the radiation curing coating A, the main resin can be organic-inorganic hybrid nano modified resin (preferably nano alumina modified epoxy acrylic resin or polyurethane acrylic resin), the mass content of the nano modified resin is 5-80%, preferably 10-50%, and the radiation curing coating has good abrasion resistance and scratch resistance.

When the radiation curing coating is applied to the surface of a conventional floor material, such as the floor surface of a home or office and the like, the inorganic filler in the radiation curing coating A preferably adopts particles containing high-hardness inorganic powder, such as one or a combination of more of alumina, silicon carbide and diamond micropowder, the mass content of the inorganic filler is 1-50%, preferably 10-20%, and the particle size of the inorganic filler is 1-100 μm, preferably 2-20 μm, so that the radiation curing coating has good wear resistance and scratch resistance. The radiation curing coating B adopts a high-hardness coating.

When the radiation curing coating is applied to the surface of high-end ground materials, such as in public places of factories, supermarkets, airports, stations and the like, the inorganic filler in the radiation curing coating A preferably adopts particles containing high-hardness inorganic powder, such as one or a combination of more of alumina, silicon carbide and diamond micropowder, the mass content of the inorganic filler is 1-50%, preferably 10-20%, the particle size of the inorganic filler is 1-100 mu m, preferably 2-20 mu m, the main body resin is organic-inorganic hybrid nano modified resin (preferably nano alumina modified epoxy acrylic resin or polyurethane acrylic resin), and the mass content of the nano modified resin is 5-80%, preferably 10-50%. The radiation curing coating B is preferably a high-hardness coating and at least 2 coatings, the inorganic filler in the radiation curing coating B is preferably high-hardness inorganic powder particles, such as one or a combination of alumina, silicon carbide and diamond micropowder, the mass content of the inorganic filler in the upper coating is preferably 1-20%, the particle size of the inorganic filler is preferably 20-60 μm, the mass content of the inorganic filler in the lower coating is preferably 15-50%, and the particle size of the inorganic filler is preferably 30-100 μm, so that the radiation curing coating has high hardness, high strength and durability in use.

The preparation process can replace the conventional film pressing preparation process to prepare the coating (especially the coating with good mirror effect) with excellent wear resistance and scratch resistance, and meets the requirements of various application fields such as furniture building materials, outdoor building materials and the like.

Compared with the prior art, the invention has the advantages that:

1. the preparation process of the radiation curing coating has controllable coating surface effect. The radiation curing coating A becomes a surface coating after being transferred by the carrier film, the surface effect of the coating is completely controlled by the form of the carrier film, the mirror surface effect coating can be obtained by adopting the mirror surface film, the bright coating can be obtained by adopting the bright film, the matte coating can be obtained by adopting the matte film, and the surface texture of the coating can be enriched by the film texture design.

2. The preparation process of the radiation curing coating has the advantages of strong construction environment tolerance, uniform coating surface effect and high product qualification rate. When the coating of the conventional film pressing process is used in the fields (such as furniture, floors and the like) with higher requirements on wear resistance and scratch resistance, inorganic filler with higher hardness needs to be added into the coating, but the addition of the inorganic filler causes the defoaming property of the coating to be poor, bubbles cannot be eliminated after film coating, the phenomena of 'pinholes' and 'craters' are formed on the surface of the coating, and the existence of inorganic filler particles in the film pressing coating weakens the wetting and containing effects of the inorganic filler particles on other solid particles, so that dust particles in the construction environment (in the film laying process) are easy to form particle salient points on the surface of the coating, and the product percent of pass is influenced. The top coating of the process is transferred from the bottom of the radiation curing coating A, so that the influence of bubbles is eliminated, the top coating does not directly contact the environment in the construction process, dust particles in the air cannot be polluted, and the product percent of pass is greatly improved.

3. The top coating of the preparation process of the radiation curing coating eliminates the influence of oxygen inhibition and has more excellent coating performance. Oxygen inhibition has a great influence on the double bond conversion rate of the radiation cured coating, and particularly, when the coating is thin and has a matte effect, the reduction degree of the double bond conversion rate can seriously influence the surface performance of the coating. The top coating of the preparation process is transferred from the bottom of the radiation curing coating A, the bottom is not contacted with air, the influence of oxygen inhibition is eliminated, and the coating weight is as low as 1g/m even if the radiation curing coating A is thinly coated²The bottom can still be cured well, and the paint still has excellent scratch resistance and hardness after being transferred to a top coating.

4. The polymer film can absorb and reflect part of energy when the coating is cured by radiation in the conventional film pressing process, and the curing effect is influenced. According to the coating obtained by the preparation process of the radiation curing coating, the radiation curing energy of the radiation curing coating A is completely acted on the radiation curing coating A, and the radiation curing energy is not consumed by the carrier film.

5. The addition amount of the inorganic filler in the preparation process of the radiation curing coating is not limited, and the mirror effect of the coating cannot be influenced. The micro scratch resistance of the mirror coating prepared by the conventional process can only reach B2 level, the traffic scratch resistance can only reach C4 level, when the coating is used in the field with higher requirements on wear resistance and scratch resistance, inorganic filler with higher hardness needs to be added into the coating, but the mirror effect can be obviously influenced and the product percent of pass is reduced due to the excessive addition of the inorganic filler. The final finish coat of the preparation process is a turn-over coat of the radiation curing coat A, the surface form of the coat is controlled by the carrier film, and the addition of the inorganic filler in the radiation curing coat A does not influence the mirror effect completely, so a large amount of inorganic filler can be added in the radiation curing coat A, and the radiation curing coat B can obtain a coat with excellent wear resistance and scratch resistance even if the inorganic filler is not added completely.

In general, the preparation process of the radiation curing coating has the advantages of strong tolerance to construction environment, no oxygen inhibition influence, no consumption of radiation curing energy by a carrier film, no limitation of the addition amount of the inorganic functional filler and good mirror surface effect, can prepare the mirror surface coating with micro scratch resistance reaching B1 level and traffic scratch resistance reaching C2 level, and achieves the effect of replacing ceramic tiles and marble.

Detailed Description

In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.

The raw materials of the radiation-cured coating A and the radiation-cured coating B referred to in the following examples and comparative examples can be conventional products, and generally have no special requirements.

Example 1:

a process for preparing a radiation-cured coating comprising the steps of:

(1) a radiation-cured coating A is coated on a PET film with the thickness of 50 mu m, the PET film is a bright mirror film, the radiation-cured coating A contains 5% (mass content, the same below) of silicon powder, the particle size of the silicon powder is 2 mu m, and the coating A is coated with the thickness of 2g/m²Radiation curing the coating by adopting a gallium lamp to obtain a pre-coating film;

(2) coating a radiation curing coating B on the substrate, wherein the radiation curing coating B is a conventional transparent coating and the coating thickness is 30g/m²Pasting the pre-coating film in the step (1) onOn the radiation curing coating B, the coating surface of the pre-coating film is contacted with the radiation curing coating B to obtain a coating precursor;

(3) and (3) performing radiation curing on the coating precursor in the step (2) by adopting a gallium lamp, removing the PET film, and performing secondary radiation curing on the coating by adopting a mercury lamp to obtain the radiation-cured coating.

The radiation-cured coating A can be ceramic glaze and can contain 20% (mass content, the same below) of 6-functionality polyurethane acrylic resin, 40% of 2-functionality epoxy acrylic resin, 30% of a reactive diluent, namely dipropylene glycol diacrylate, 3% of photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2% of auxiliary agent and 5% of silicon micropowder; the radiation-cured coating B described above may comprise 20% of a 6-functional urethane acrylic resin, 35% of a 2-functional epoxy acrylic resin, 10% of a 2-functional urethane acrylate resin, 30% of a reactive diluent dipropylene glycol diacrylate, 3% of a photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide and 2% of auxiliaries.

The radiation curing coating obtained by the embodiment is a bright mirror coating, has good scratch resistance, and can be applied to the surfaces of common furniture and wall materials, such as doors, windows, cabinets, wallboards and the like.

Of course, the composition of the radiation-cured coating a and the radiation-cured coating B in the present embodiment may be adjusted, and the radiation-cured coating a may optionally be free of inorganic filler.

Example 2:

a process for preparing a radiation-cured coating comprising the steps of:

(1) coating a radiation curing coating A on a PET film with the thickness of 200 mu m, wherein the PET film is a matte mirror film, the radiation curing coating A contains 20 percent of glass powder, the particle size of the glass powder is 20 mu m, and the coating thickness of the coating A is 10g/m²Adopting an LED lamp to carry out radiation curing on the coating to obtain a pre-coating film;

(2) coating a radiation curing coating B on the substrate, wherein the radiation curing coating B is a conventional transparent coating and the coating thickness is 100g/m²The pre-coating film in the step (1) is attached to the radiation curing coating BContacting the coating surface of the pre-coating film with the radiation curing coating B to obtain a coating precursor;

(3) and (3) performing radiation curing on the coating precursor in the step (2) by adopting a gallium lamp, removing the PET film, and performing secondary radiation curing on the coating by adopting a mercury lamp to obtain the radiation-cured coating.

The radiation cured coating a in this example may be a ceramic glaze, which may comprise 20% of 6 functional urethane acrylic resin, 25% of 2 functional epoxy acrylic resin, 30% of a reactive diluent dipropylene glycol diacrylate, 3% of photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2% of an auxiliary agent and 20% of glass powder; the radiation-curable coating B described above may be the same as in example 1.

The radiation curing coating obtained by the embodiment is a matte mirror coating, has good scratch resistance, and can be applied to the surfaces of common furniture and wall materials, such as doors, windows, cabinets, wallboards and the like.

Example 3:

a process for preparing a radiation-cured coating comprising the steps of:

(1) coating a radiation curing coating A on a PET film with the thickness of 100 mu m, wherein the PET film is a film with special texture, the radiation curing coating A contains 20 percent of organic-inorganic hybrid nano modified resin, and the coating A is coated with the thickness of 5g/m²Radiation curing the coating by using a mercury lamp to obtain a pre-coating film;

(2) coating a radiation curing coating B on the substrate, wherein the radiation curing coating B is a conventional transparent coating and has the coating thickness of 50g/m²Attaching the pre-coating film in the step (1) to the radiation curing coating B, and contacting the coating surface of the pre-coating film with the radiation curing coating B to obtain a coating precursor;

(3) and (3) performing radiation curing on the coating precursor in the step (2) by adopting a gallium lamp, removing the PET film, and performing secondary radiation curing on the coating by adopting a mercury lamp to obtain the radiation-cured coating.

The radiation-cured coating a in this example may be a ceramic glaze, and may comprise 20% of 6-functionality urethane acrylic resin, 25% of 2-functionality epoxy acrylic resin, 30% of a reactive diluent, dipropylene glycol diacrylate, 3% of a photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2% of an auxiliary agent, and 20% of an organic-inorganic hybrid nano-modified resin; the radiation-curable coating B described above may be the same as in example 1.

The radiation curing coating obtained by the embodiment is a coating with special textures on the surface, has good abrasion resistance and scratch resistance, and can be applied to the surfaces of high-end furniture and wall materials, such as desks, experiment tables, chairs and the like.

Example 4:

a process for preparing a radiation-cured coating comprising the steps of:

(1) coating a radiation curing coating A on a PE film with the thickness of 100 mu m, wherein the PE film is a bright mirror film, the radiation curing coating A contains 10 percent of alumina micropowder, the particle size of the alumina micropowder is 20 mu m, and the coating A is coated with the thickness of 3g/m²Radiation curing the coating by adopting a gallium lamp to obtain a pre-coating film;

(2) coating a radiation curing coating B on the substrate, wherein the radiation curing coating B is a conventional high-hardness transparent coating with the coating thickness of 70g/m²Attaching the pre-coating film in the step (1) to the radiation curing coating B, and contacting the coating surface of the pre-coating film with the radiation curing coating B to obtain a coating precursor;

(3) and (3) carrying out radiation curing on the coating precursor in the step (2) by adopting an LED lamp, removing the PE film, and carrying out secondary radiation curing on the coating by adopting a mercury lamp to obtain the radiation-cured coating.

The radiation cured coating a in this example may be a diamond glaze comprising 20% of 6 functionality polyurethane acrylic, 35% of 2 functionality epoxy acrylic, 30% of a reactive diluent dipropylene glycol diacrylate, 3% of a photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2% of an adjuvant and 10% of alumina micropowder; the radiation-cured coating B described above may comprise 55% of a 6-functional urethane acrylic resin, 10% of a 2-functional urethane acrylate resin, 30% of a reactive diluent dipropylene glycol diacrylate, 3% of a photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide and 2% of auxiliaries.

The radiation curing coating obtained by the embodiment is a bright mirror coating, has good wear resistance and scratch resistance, and can be applied to the surfaces of conventional floor materials, such as floors of homes and offices.

Example 5:

a process for preparing a radiation-cured coating comprising the steps of:

(1) coating a radiation curing coating A on a PP film with the thickness of 150 mu m, wherein the PP film is a bright mirror film, the radiation curing coating A contains 20 percent of silicon carbide micro powder, the particle size of the silicon carbide micro powder is 10 mu m, and the coating A is coated with the thickness of 4g/m²Radiation curing the coating by adopting a gallium lamp to obtain a pre-coating film;

(2) coating a radiation curing coating B on the substrate, wherein the radiation curing coating B is a conventional high-hardness transparent coating with the coating thickness of 70g/m²Attaching the pre-coating film in the step (1) to the radiation curing coating B, and contacting the coating surface of the pre-coating film with the radiation curing coating B to obtain a coating precursor;

(3) and (3) performing radiation curing on the coating precursor in the step (2) by adopting EB (Electron beam), removing the PP film, and performing secondary radiation curing on the coating by adopting a mercury lamp to obtain the radiation-cured coating.

The radiation-cured coating a in this example may be a diamond glaze, which may comprise 20% of 6-functional urethane acrylic resin, 25% of 2-functional epoxy acrylic resin, 30% of a reactive diluent, dipropylene glycol diacrylate, 3% of photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2% of an auxiliary agent, and 20% of silicon carbide micropowder; the radiation-curable coating B described above may be the same as in example 4.

The radiation curing coating obtained by the embodiment is a bright mirror coating, has good wear resistance and scratch resistance, and can be applied to the surfaces of conventional floor materials, such as floors of homes and offices.

Example 6:

a process for preparing a radiation-cured coating comprising the steps of:

(1) coating radiation-cured coating A on a 150 μm thick PET filmThe film is a bright mirror film, the radiation curing coating A comprises 20 percent of alumina micropowder and 20 percent of organic-inorganic hybrid nano modified resin, the grain diameter of the alumina micropowder is 15 mu m, and the coating thickness of the coating A is 4g/m²Radiation curing the coating by adopting a gallium lamp to obtain a pre-coating film;

(2) coating a radiation-cured coating B on the substrate, wherein the radiation-cured coating B is a 2-pass high-hardness coating, the coating contains 5% of alumina micropowder with the particle size of 30 mu m, and the coating thickness is 40g/m²The lower coating layer contains 15% of alumina fine powder with a particle size of 50 μm and is coated to a thickness of 40g/m²The lower coating is cured by radiation of a mercury lamp, the pre-coating film in the step (1) is attached to the radiation curing coating B, and the coating surface of the pre-coating film is contacted with the radiation curing coating B to obtain a coating precursor;

(3) and (3) performing radiation curing on the coating precursor in the step (2) by adopting a gallium lamp, removing the PET film, and performing secondary radiation curing on the coating by adopting a mercury lamp to obtain the radiation-cured coating.

The radiation-cured coating a in this example may be a diamond glaze, which may comprise 25% of 6-functionality polyurethane acrylic resin, 30% of a reactive diluent, dipropylene glycol diacrylate, 3% of a photoinitiator (2,4, 6-trimethylbenzoyl chloride), diphenylphosphine oxide, 2% of an auxiliary agent, 20% of alumina micropowder and 20% of an organic-inorganic hybrid nano-modified resin; the upper coating of the radiation-cured coating B can contain 50% of 6-functionality polyurethane acrylic resin, 10% of 2-functionality polyurethane acrylate resin, 30% of reactive diluent dipropylene glycol diacrylate, 3% of photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2% of auxiliaries and 5% of alumina micropowder; the lower coating layer can contain 40% of 6-functionality polyurethane acrylic resin, 10% of 2-functionality polyurethane acrylate resin, 30% of reactive diluent dipropylene glycol diacrylate, 3% of photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2% of auxiliary agent and 15% of alumina micropowder.

The radiation curing coating obtained by the embodiment is a bright mirror coating, has high hardness, high strength and durability in use, and can be applied to the surface of high-end ground materials, such as floors of factories, supermarkets, airports, stations and other public places.

Example 7:

a process for preparing a radiation-cured coating comprising the steps of:

(1) coating a radiation curing coating A on a PET film with the thickness of 150 mu m, wherein the PET film is a bright mirror film, the radiation curing coating A comprises 30 percent of diamond micro powder and 50 percent of organic-inorganic hybrid nano modified resin, the grain diameter of the diamond micro powder is 10 mu m, and the coating thickness of the coating A is 5g/m²Radiation curing the coating by adopting a gallium lamp to obtain a pre-coating film;

(2) coating a radiation-cured coating B on the substrate, wherein the radiation-cured coating B is a 2-pass high-hardness coating, the coating contains 10% of alumina micropowder with the particle size of 50 mu m, and the coating thickness is 60g/m²The lower coating layer contains 40% of alumina fine powder with a particle size of 100 μm and is coated to a thickness of 80g/m²The lower coating is cured by radiation of an LED lamp, and the pre-coating film in the step (1) is attached to the radiation curing coating B, so that the coating surface of the pre-coating film is contacted with the radiation curing coating B to obtain a coating precursor;

(3) and (3) performing radiation curing on the coating precursor in the step (2) by adopting a gallium lamp, removing the PET film, and performing secondary radiation curing on the coating by adopting a mercury lamp to obtain the radiation-cured coating.

The radiation-cured coating a in this example may be a diamond glaze, and may include 15% of a reactive diluent, dipropylene glycol diacrylate, 3% of a photoinitiator (2,4, 6-trimethylbenzoyl chloride), diphenylphosphine oxide, 2% of an auxiliary agent, 30% of diamond micropowder, and 50% of an organic-inorganic hybrid nano-modified resin; the upper coating of the radiation-cured coating B can contain 45% of 6-functionality polyurethane acrylic resin, 10% of 2-functionality polyurethane acrylate resin, 30% of reactive diluent dipropylene glycol diacrylate, 3% of photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2% of auxiliaries and 10% of alumina micropowder; the lower coating layer can contain 15% of 6-functionality polyurethane acrylic resin, 10% of 2-functionality polyurethane acrylate resin, 30% of reactive diluent dipropylene glycol diacrylate, 3% of photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2% of auxiliary agent and 40% of alumina micropowder.

The radiation curing coating obtained by the embodiment is a bright mirror coating, has high hardness, high strength and durability in use, and can be applied to the surface of high-end ground materials, such as floors of factories, supermarkets, airports, stations and other public places.

Comparative example 1:

this comparative example prepared a radiation-cured coating using a conventional film-pressing process, with other conditions controlled the same as in example 1. That is, a conventional transparent coating layer B comprising 20% of 6-functional urethane acrylic resin, 35% of 2-functional epoxy acrylic resin, 10% of 2-functional urethane acrylate resin, 30% of dipropylene glycol diacrylate as a reactive diluent, 3% of photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide and 2% of an auxiliary agent was coated on a substrate to a thickness of 32g/m²And adhering a PET film with the thickness of 50 mu m on the coating B, performing radiation curing by adopting a gallium lamp, removing the PET film, and performing secondary radiation curing on the coating by adopting a mercury lamp to obtain the radiation cured coating.

Comparative example 2:

in the comparative example, a radiation-cured coating is prepared by using a conventional film pressing process, 20% of silicon carbide micro powder is added into the radiation-cured coating B in example 5, and other conditions are controlled to be the same as those in example 5. Namely coating a high-hardness coating B on a substrate, wherein the coating B comprises 35 percent of 6-functionality polyurethane acrylic resin, 10 percent of 2-functionality polyurethane acrylate resin, 30 percent of reactive diluent dipropylene glycol diacrylate, 3 percent of photoinitiator (2,4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide, 2 percent of auxiliary agent and 20 percent of silicon carbide micro powder, and the coating thickness is 74g/m²And adhering a PP film with the thickness of 150 mu m on the coating B, performing radiation curing by adopting EB, removing the PP film, and performing secondary radiation curing on the coating by adopting a mercury lamp to obtain the radiation cured coating.

Table 1 below shows comparative performance data for the radiation-cured coatings of comparative examples 1-2 and examples 1-7.

Table 1: performance data for the coatings of comparative examples 1-2 and examples 1-7