A stain-resistant decorative paper and a method for producing the same

Abstract

The application relates to a stain-resistant decorative paper and a preparation method thereof. The stain-resistant decorative paper comprises impregnated paper and a stain-resistant coating layer coated on the outer surface of the impregnated paper, wherein the stain-resistant coating layer is formed by curing a stain-resistant coating material on the impregnated paper; the stain-resistant coating material comprises the following raw materials in parts by weight: modified acrylic resin 40-50 parts, bisphenol A epoxy acrylate 15-20 parts, ethoxylated trimethylolpropane triacrylate 10-15 parts, nano-silicon dioxide 5-9 parts, nano-zinc oxide 4-8 parts, polyoxyethylene ether 3-5 parts, film-forming aid 2-4 parts, photoinitiator 2-4 parts, ethyl acetate 5-10 parts, and water 20-30 parts. The stain-resistant decorative paper has good stain resistance, wear resistance and scratch resistance, and has a long service life; the preparation method is simple in process, convenient to operate, high in production efficiency, and beneficial to industrial production.

Description

Technical Field

[0001] This invention relates to the field of decorative paper technology, specifically to a stain-resistant decorative paper and its preparation method. Background Technology

[0002] With societal progress and improved living standards, decorative paper is now widely used in interior decoration, furniture, and building materials to enhance aesthetics and durability. However, existing decorative paper often suffers from stains such as sweat, grease, and dust, negatively impacting its appearance and user experience, making cleaning inconvenient, and shortening its lifespan. Therefore, its stain resistance and durability need further improvement. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a stain-resistant decorative paper and its preparation method. The stain-resistant decorative paper has good stain resistance, abrasion resistance and scratch resistance, and a long service life. Its preparation method is simple, easy to operate, and has high production efficiency, which is conducive to industrial production.

[0004] The objective of this invention is achieved through the following technical solution: a stain-resistant decorative paper, comprising impregnated paper and a stain-resistant coating covering the outer surface of the impregnated paper, wherein the stain-resistant coating is formed by coating the impregnated paper with a stain-resistant paint and then curing it; the stain-resistant paint comprises the following raw materials in parts by weight: 40-50 parts modified acrylic resin, 15-20 parts epoxy acrylic resin, 10-15 parts ethoxylated trimethylolpropane triacrylate, 5-9 parts nano silica, 4-8 parts nano zinc oxide, 3-5 parts polyoxyethylene ether, 2-4 parts film-forming aid, 2-4 parts photoinitiator, 5-10 parts ethyl acetate, and 20-30 parts water.

[0005] The stain-resistant coating of this invention uses modified acrylic acid and epoxy acrylic resin as the main body, and adds ethoxylated trimethylolpropane triacrylate to provide unsaturated double bonds. The modified acrylic acid, epoxy acrylic resin, ethoxylated trimethylolpropane triacrylate, and other raw materials such as nano silica, nano zinc oxide, and polyoxyethylene ether achieve good synergy, which can endow the coating with stain resistance, abrasion resistance and thermal stability, and improve the durability and user experience of decorative paper.

[0006] Furthermore, the preparation method of each portion of the modified acrylic resin includes the following steps:

[0007] A1. By weight, take 30-40 parts of methyl methacrylate, 6-10 parts of isooctyl acrylate, 5-9 parts of ethyl acrylate isocyanate, and 0.5-1 parts of initiator and mix them evenly to obtain mixture A; take 25-35 parts of butyl acetate, heat to 75-80℃, and under nitrogen protection, add mixture A dropwise to butyl acetate over 2-3 hours, then keep warm for 6-8 hours, adding 0.5-1 parts of initiator every 120-150 minutes during the warming period. After the reaction is complete, cool to room temperature to obtain mixture A;

[0008] A2. Add 4-7 parts of perfluorooctyltrimethoxysilane, 3-6 parts of hexamethylcyclotrisiloxane and 3-6 parts of perfluorooctyl alcohol to mixture A. Add a catalyst at 75-85℃. When the isocyanate content in the reaction system reaches more than 98% of the theoretical value, add 3-6 parts of hydroquinone monomethyl ether and 1-2 parts of hydroquinone monomethyl ether to obtain modified acrylic resin.

[0009] This invention obtains an acrylate copolymer by using the above method, and simultaneously grafts perfluorooctyltrimethoxysilane, hexamethylcyclotrisiloxane, perfluorooctyl alcohol and hydroxyethyl methacrylate onto the acrylate copolymer to obtain a fluorosilicone modified acrylic resin, which can impart excellent hydrophobic and oleophobic properties to the coating and improve the coating's anti-fouling, abrasion resistance and resistance to thermal cycling.

[0010] Furthermore, in step A1, the initiator is at least one of azobisisobutyronitrile and azobisisoheptanenitrile.

[0011] Furthermore, in step A2, the catalyst is at least one of stannous octoate and dibutyltin dilaurate.

[0012] Furthermore, the film-forming aid is at least one of ethylene glycol tert-butyl ether, dipropylene glycol methyl ether, and dipropylene glycol butyl ether.

[0013] Furthermore, the particle size of the nano-silica and nano-zinc oxide is 30-80 nm.

[0014] Furthermore, the photoinitiator is at least one selected from 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenylpropanone, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

[0015] Furthermore, the method for preparing the stain-resistant coating includes the following steps:

[0016] B1. Mix modified acrylic resin, epoxy acrylic resin, ethoxylated trimethylolpropane triacrylate, nano silica, nano zinc oxide, polyoxyethylene ether and water in a certain proportion, heat to 65-70℃ and stir continuously, keep warm for 20-40 minutes to obtain mixture B.

[0017] B2. Add film-forming aid, photoinitiator and ethyl acetate to mixture B, stir for 30-60 minutes, cool to room temperature to obtain stain-resistant coating.

[0018] The present invention also provides a method for preparing the above-mentioned stain-resistant decorative paper, comprising the following steps:

[0019] (1) Apply a stain-resistant coating to the surface of the impregnated paper;

[0020] (2) The impregnated paper coated with stain-resistant paint is baked and then cured by ultraviolet light to obtain stain-resistant decorative paper.

[0021] Furthermore, in step (2), the impregnated paper coated with stain-resistant paint is baked at 58-65℃ for 5-15 minutes, and then irradiated with ultraviolet light for 10-20 minutes to obtain stain-resistant decorative paper.

[0022] The beneficial effects of the present invention are as follows: the stain-resistant decorative paper of the present invention forms a dense hydrophobic and oleophobic layer on the surface of the decorative paper by using a stain-resistant coating, which makes the stain-resistant decorative paper have good stain resistance, abrasion resistance and scratch resistance, and long service life; the preparation method is simple, easy to operate, and has high production efficiency, which is conducive to industrial production. Detailed Implementation

[0023] To facilitate understanding by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In some embodiments of the present invention, a stain-resistant decorative paper includes impregnated paper and a stain-resistant coating covering the outer surface of the impregnated paper. The stain-resistant coating is formed by applying a stain-resistant paint to the impregnated paper and then curing it. The stain-resistant paint comprises the following raw materials in parts by weight: 40-50 parts modified acrylic resin, 15-20 parts epoxy acrylic resin, 10-15 parts ethoxylated trimethylolpropane triacrylate, 5-9 parts nano silica, 4-8 parts nano zinc oxide, 3-5 parts polyoxyethylene ether, 2-4 parts film-forming aid, 2-4 parts photoinitiator, 5-10 parts ethyl acetate, and 20-30 parts water. The epoxy acrylic resin is bisphenol A type epoxy acrylic resin AgiSyn 1030.

[0025] In some embodiments of the present invention, the preparation method of each part of the modified acrylic resin includes the following steps:

[0026] A1. By weight, take 30-40 parts of methyl methacrylate, 6-10 parts of isooctyl acrylate, 5-9 parts of ethyl acrylate isocyanate, and 0.5-1 parts of initiator and mix them evenly to obtain mixture A; take 25-35 parts of butyl acetate, heat to 75-80℃, and under nitrogen protection, add mixture A dropwise to butyl acetate over 2-3 hours, then keep warm for 6-8 hours, adding 0.5-1 parts of initiator every 120-150 minutes during the warming period. After the reaction is complete, cool to room temperature to obtain mixture A;

[0027] A2. Add 4-7 parts of perfluorooctyltrimethoxysilane, 3-6 parts of hexamethylcyclotrisiloxane, and 3-6 parts of perfluorooctyl alcohol to mixture A. Add a catalyst at 75-85℃. When the isocyanate content in the reaction system reaches more than 98% of the theoretical value, add 3-6 parts of hydroxyethyl methacrylate and 1-2 parts of hydroquinone monomethyl ether to obtain modified acrylic resin.

[0028] In some embodiments of the present invention, in step A1, the initiator is at least one of azobisisobutyronitrile and azobisisoheptanenitrile.

[0029] In some embodiments of the present invention, in step A2, the catalyst is at least one of stannous octoate and dibutyltin dilaurate.

[0030] In some embodiments of the present invention, the film-forming aid is at least one of ethylene glycol tert-butyl ether, dipropylene glycol methyl ether, and dipropylene glycol butyl ether.

[0031] In some embodiments of the present invention, the particle size of the nano-silica and nano-zinc oxide is 30-80 nm.

[0032] In some embodiments of the present invention, the photoinitiator is at least one selected from 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenylpropanone, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

[0033] In some embodiments of the present invention, the method for preparing the stain-resistant coating includes the following steps:

[0034] B1. Mix modified acrylic resin, epoxy acrylic resin, ethoxylated trimethylolpropane triacrylate, nano silica, nano zinc oxide, polyoxyethylene ether and water in a certain proportion, heat to 65-70℃ and stir continuously, keep warm for 20-40 minutes to obtain mixture B.

[0035] B2. Add film-forming aid, photoinitiator and ethyl acetate to mixture B, stir for 30-60 minutes, cool to room temperature to obtain stain-resistant coating.

[0036] In some embodiments of the present invention, the method for preparing the above-mentioned stain-resistant decorative paper includes the following steps:

[0037] (1) Apply a stain-resistant coating to the surface of the impregnated paper, with a coating amount of 30-60 g / m². 2 ;

[0038] (2) The impregnated paper coated with stain-resistant paint is baked and then cured by ultraviolet light to obtain stain-resistant decorative paper.

[0039] Furthermore, in step (2), the impregnated paper coated with stain-resistant paint is baked at 58-65℃ for 5-15 minutes, and then irradiated with ultraviolet light for 10-20 minutes to obtain stain-resistant decorative paper.

[0040] Example 1

[0041] In this embodiment, a stain-resistant decorative paper includes impregnated paper and a stain-resistant coating covering the outer surface of the impregnated paper. The stain-resistant coating is formed by applying a stain-resistant paint to the impregnated paper and then curing it. The stain-resistant paint comprises the following raw materials in parts by weight: 45 parts modified acrylic resin, 18 parts epoxy acrylic resin, 12 parts ethoxylated trimethylolpropane triacrylate, 6 parts nano silica, 6 parts nano zinc oxide, 4 parts polyoxyethylene ether, 3 parts film-forming aid, 3 parts photoinitiator, 7 parts ethyl acetate, and 25 parts water. The epoxy acrylic resin is bisphenol A type epoxy acrylic resin AgiSyn 1030. The impregnated paper is an existing type of impregnated paper, obtained by impregnating digital printing paper with an existing polyurethane impregnating adhesive.

[0042] Furthermore, the preparation method of each portion of the modified acrylic resin includes the following steps:

[0043] A1. By weight, take 35 parts of methyl methacrylate, 8 parts of isooctyl acrylate, 7 parts of ethyl acrylate isocyanate, and 0.7 parts of initiator and mix them evenly to obtain mixture A; take 30 parts of butyl acetate, heat to 78℃, and under nitrogen protection, add mixture A dropwise to butyl acetate over a period of 2.5 hours, then keep warm for 7 hours. During the warming period, add 0.6 parts of initiator every 120 minutes. After the reaction is complete, cool down to room temperature to obtain mixture A;

[0044] A2. Add 6 parts of perfluorooctyltrimethoxysilane, 4 parts of hexamethylcyclotrisiloxane and 4 parts of perfluorooctol to mixture A. Add a catalyst at 80°C. When the isocyanate content in the reaction system reaches more than 98% of the theoretical value, add 5 parts of hydroxyethyl methacrylate and 1.5 parts of hydroquinone monomethyl ether to obtain modified acrylic resin.

[0045] Furthermore, in step A1, the initiator is azobisisobutyronitrile.

[0046] Furthermore, in step A2, the catalyst is composed of stannous octoate and dibutyltin dilaurate in a weight ratio of 1:1.

[0047] Furthermore, the film-forming aid is composed of ethylene glycol tert-butyl ether and dipropylene glycol methyl ether in a weight ratio of 2:1.

[0048] Furthermore, the particle size of the nano-silica and nano-zinc oxide is 30-80 nm.

[0049] Furthermore, the photoinitiator is 1-hydroxycyclohexylphenyl ketone.

[0050] Furthermore, the method for preparing the stain-resistant coating includes the following steps:

[0051] B1. Mix modified acrylic resin, epoxy acrylic resin, ethoxylated trimethylolpropane triacrylate, nano silica, nano zinc oxide, polyoxyethylene ether and water in a certain proportion, heat to 67°C and stir continuously, keep warm for 300 min to obtain mixture B.

[0052] B2. Add film-forming aid, photoinitiator and ethyl acetate to mixture B, stir for 40 min, cool to room temperature to obtain stain-resistant coating.

[0053] The method for preparing the above-mentioned stain-resistant decorative paper includes the following steps:

[0054] (1) Apply a stain-resistant coating to the surface of the impregnated paper at a coating amount of 50 g / m². 2 ;

[0055] (2) The impregnated paper coated with stain-resistant paint is baked and then cured by ultraviolet light to obtain stain-resistant decorative paper.

[0056] Furthermore, in step (2), the impregnated paper coated with stain-resistant paint is baked at 60°C for 10 minutes, and then irradiated with ultraviolet light for 10 minutes with an ultraviolet energy of 900 mJ / cm². 2 Stain-resistant decorative paper is obtained.

[0057] Example 2

[0058] In this embodiment, a stain-resistant decorative paper includes impregnated paper and a stain-resistant coating covering the outer surface of the impregnated paper. The stain-resistant coating is formed by applying a stain-resistant coating to the impregnated paper and then curing it. The stain-resistant coating includes the following raw materials in parts by weight: 40 parts modified acrylic resin, 15 parts epoxy acrylic resin, 15 parts ethoxylated trimethylolpropane triacrylate, 5 parts nano silica, 4 parts nano zinc oxide, 3 parts polyoxyethylene ether, 4 parts film-forming aid, 2 parts photoinitiator, 5 parts ethyl acetate, and 20 parts water.

[0059] Furthermore, the preparation method of each portion of the modified acrylic resin includes the following steps:

[0060] A1. By weight, take 40 parts of methyl methacrylate, 6 parts of isooctyl acrylate, 5 parts of ethyl isocyanate acrylate, and 0.5 parts of initiator and mix them evenly to obtain mixture A; take 25 parts of butyl acetate, heat to 75℃, and under nitrogen protection, add mixture A dropwise to butyl acetate over 2 hours, then keep warm for 6 hours. During the warming period, add 0.5 parts of initiator every 120 minutes. After the reaction is complete, cool to room temperature to obtain mixture A;

[0061] A2. Add 4 parts of perfluorooctyltrimethoxysilane, 3 parts of hexamethylcyclotrisiloxane and 3 parts of perfluorooctyl alcohol to mixture A. Add a catalyst at 75°C. When the isocyanate content in the reaction system reaches more than 98% of the theoretical value, add 3 parts of hydroxyethyl methacrylate and 1 part of hydroquinone monomethyl ether to obtain modified acrylic resin.

[0062] Furthermore, in step A1, the initiator is azobisisobutyronitrile.

[0063] Furthermore, in step A2, the catalyst is at least one of dibutyltin dilaurate.

[0064] Furthermore, the film-forming aid is composed of ethylene glycol tert-butyl ether and dipropylene glycol butyl ether in a weight ratio of 1:1.

[0065] Furthermore, the photoinitiator is 2-hydroxy-2-methyl-1-phenylpropane.

[0066] Furthermore, the method for preparing the stain-resistant coating includes the following steps:

[0067] B1. Mix modified acrylic resin, epoxy acrylic resin, ethoxylated trimethylolpropane triacrylate, nano silica, nano zinc oxide, polyoxyethylene ether and water in a certain proportion, heat to 65°C and stir continuously, keep warm for 40 min to obtain mixture B.

[0068] B2. Add film-forming aid, photoinitiator and ethyl acetate to mixture B, stir for 30 min, cool to room temperature to obtain stain-resistant coating.

[0069] The method for preparing the above-mentioned stain-resistant decorative paper includes the following steps:

[0070] (1) Apply a stain-resistant coating to the surface of the impregnated paper at a coating amount of 50 g / m². 2 ;

[0071] (2) The impregnated paper coated with stain-resistant paint is baked and then cured by ultraviolet light to obtain stain-resistant decorative paper.

[0072] Furthermore, in step (2), the impregnated paper coated with stain-resistant paint is heated at 58°C for 5-15 minutes, and then irradiated with ultraviolet light for 20 minutes to obtain stain-resistant decorative paper.

[0073] The rest of this embodiment is the same as that in Embodiment 1.

[0074] Example 3

[0075] In this embodiment, a stain-resistant decorative paper includes impregnated paper and a stain-resistant coating covering the outer surface of the impregnated paper. The stain-resistant coating is formed by applying a stain-resistant coating to the impregnated paper and then curing it. The stain-resistant coating includes the following raw materials in parts by weight: 50 parts modified acrylic resin, 20 parts epoxy acrylic resin, 10-15 parts ethoxylated trimethylolpropane triacrylate, 8 parts nano silica, 6 parts nano zinc oxide, 3-5 parts polyoxyethylene ether, 2-4 parts film-forming aid, 2-4 parts photoinitiator, 5-10 parts ethyl acetate, and 20-30 parts water.

[0076] Furthermore, the preparation method of each portion of the modified acrylic resin includes the following steps:

[0077] A1. By weight, take 40 parts of methyl methacrylate, 10 parts of isooctyl acrylate, 9 parts of ethyl isocyanate acrylate and 1 part of initiator and mix them evenly to obtain mixture A; take 35 parts of butyl acetate, heat to 80℃, and under nitrogen protection, add mixture A dropwise to butyl acetate for 3 hours, then keep warm for 8 hours. During the warming period, add 1 part of initiator every 150 minutes. After the reaction is completed, cool down to room temperature to obtain mixture A;

[0078] A2. Add 7 parts of perfluorooctyltrimethoxysilane, 5 parts of hexamethylcyclotrisiloxane and 4 parts of perfluorooctyl alcohol to mixture A. Add a catalyst at 80°C. When the isocyanate content in the reaction system reaches more than 98% of the theoretical value, add 6 parts of hydroxyethyl methacrylate and 2 parts of hydroquinone monomethyl ether to obtain modified acrylic resin.

[0079] Furthermore, in step A1, the initiator is at least one of azobisisoheptane.

[0080] Furthermore, in step A2, the catalysts are stannous octoate and dibutyltin dilaurate.

[0081] Furthermore, the photoinitiator is 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

[0082] Furthermore, the method for preparing the stain-resistant coating includes the following steps:

[0083] B1. Mix modified acrylic resin, epoxy acrylic resin, ethoxylated trimethylolpropane triacrylate, nano silica, nano zinc oxide, polyoxyethylene ether and water in a certain proportion, heat to 70°C and stir continuously, keep warm for 40 min to obtain mixture B.

[0084] B2. Add film-forming aid, photoinitiator and ethyl acetate to mixture B, stir for 60 min, cool to room temperature to obtain stain-resistant coating.

[0085] The method for preparing the above-mentioned stain-resistant decorative paper includes the following steps:

[0086] (1) Apply a stain-resistant coating to the surface of the impregnated paper at a coating amount of 50 g / m². 2 ;

[0087] (2) The impregnated paper coated with stain-resistant paint is baked and then cured by ultraviolet light to obtain stain-resistant decorative paper.

[0088] Furthermore, in step (2), the impregnated paper coated with stain-resistant paint is baked at 65°C for 5 minutes and then irradiated with ultraviolet light for 15 minutes to obtain stain-resistant decorative paper.

[0089] The rest of this embodiment is the same as that in Embodiment 1.

[0090] Example 4

[0091] In this embodiment, a stain-resistant decorative paper includes impregnated paper and a stain-resistant coating covering the outer surface of the impregnated paper. The stain-resistant coating is formed by applying a stain-resistant coating to the impregnated paper and then curing it. The stain-resistant coating includes the following raw materials in parts by weight: 45 parts modified acrylic resin, 16 parts epoxy acrylic resin, 12 parts ethoxylated trimethylolpropane triacrylate, 6 parts nano silica, 5 parts nano zinc oxide, 4 parts polyoxyethylene ether, 3 parts film-forming aid, 3 parts photoinitiator, 6 parts ethyl acetate, and 25 parts water.

[0092] Furthermore, the preparation method of each portion of the modified acrylic resin includes the following steps:

[0093] A1. By weight, take 35 parts of methyl methacrylate, 8 parts of isooctyl acrylate, 8 parts of ethyl isocyanate acrylate and 0.8 parts of initiator and mix them evenly to obtain mixture A; take 28 parts of butyl acetate, heat to 75℃, and under nitrogen protection, add mixture A dropwise to butyl acetate for 3 hours, then keep warm for 6 hours. During the warming period, add 0.6 parts of initiator every 120 minutes. After the reaction is completed, cool down to room temperature to obtain mixture A;

[0094] A2. Add 6 parts of perfluorooctyltrimethoxysilane, 4 parts of hexamethylcyclotrisiloxane and 5 parts of perfluorooctyl alcohol to mixture A. Add a catalyst at 80°C. When the isocyanate content in the reaction system reaches more than 98% of the theoretical value, add 4 parts of hydroxyethyl methacrylate and 2 parts of hydroquinone monomethyl ether to obtain modified acrylic resin.

[0095] Furthermore, the method for preparing the stain-resistant coating includes the following steps:

[0096] B1. Mix modified acrylic resin, epoxy acrylic resin, ethoxylated trimethylolpropane triacrylate, nano silica, nano zinc oxide, polyoxyethylene ether and water in a certain proportion, heat to 70°C and stir continuously, keep warm for 25 min to obtain mixture B.

[0097] B2. Add film-forming aid, photoinitiator and ethyl acetate to mixture B, stir for 50 min, cool to room temperature to obtain stain-resistant coating.

[0098] The method for preparing the above-mentioned stain-resistant decorative paper includes the following steps:

[0099] (1) Apply a stain-resistant coating to the surface of the impregnated paper at a coating amount of 50 g / m². 2 ;

[0100] (2) The impregnated paper coated with stain-resistant paint is baked and then cured by ultraviolet light to obtain stain-resistant decorative paper.

[0101] Furthermore, in step (2), the impregnated paper coated with stain-resistant paint is baked at 60°C for 10 minutes and then irradiated with ultraviolet light for 10 minutes to obtain stain-resistant decorative paper.

[0102] The rest of this embodiment is the same as that in Embodiment 1.

[0103] Comparative Example 1

[0104] The difference between this comparative example and Example 1 is that this comparative example uses an equal amount of JONCRYL HRC 1661 acrylic emulsion to replace the modified acrylic resin in Example 1.

[0105] Comparative Example 2

[0106] The difference between this comparative example and Example 1 is that this comparative example does not contain ethoxylated trimethylolpropane triacrylate.

[0107] Performance tests were conducted on the decorative papers of Examples 1-4 and Comparative Examples 1-2. The stain resistance and fingerprint resistance were evaluated by oleophobic pen resistance and hydrophobicity / oleophobicity.

[0108] Oil-resistant pen test: Take two points a few centimeters apart in the middle of the decorative paper surface. Draw a straight line between the two points with an oil-based pen, and repeatedly wipe the line with a lint-free cloth until the pen marks cannot be wiped off. Record the number of times as N. The number of times the oil-resistant pen is used is N-1. The more times the oil-resistant pen is used, the better the oil resistance of the surface.

[0109] Hydrophobicity and oleophobicity test: The static contact angle of water droplets and oil droplets on the coating was measured using a JC2000C1 contact angle meter. The larger the θ of the water droplet or oil droplet, the better the hydrophobicity and oleophobicity of the anti-fingerprint coating. The test liquids were water and oleic acid, and the droplet size was 5 μL. The unit is °. The test conditions were room temperature 25℃ and relative humidity 65%RH.

[0110] Decorative paper from Examples 1-4 and Comparative Examples 1-2 was hot-pressed onto a fiberboard for 3 minutes on one side under a pressure of 5 MPa and a temperature of 160°C. The fiberboard had a density of 0.68-0.72 g / cm³. 3 According to GB / T28995-2012, the appearance quality of the stain-resistant decorative paper was observed. It can be seen that the stain-resistant coatings of Examples 1-4 and Comparative Examples 1-2 showed no damage, stains, or gaps, and the appearance quality of the products all met the standard of GB / T 28995-2012. The surface abrasion resistance, surface scratch resistance (≥1.5N surface with no more than 90% scratches), and surface resistance to thermal cycling of the decorative artificial board were measured according to GBT17657-2022. The test results are shown in the table below:

[0111]

[0112]

[0113] The stain-resistant decorative paper of this invention has good stain resistance, abrasion resistance and scratch resistance, and its surface has good resistance to thermal cycling, resulting in excellent overall performance.

[0114] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A stain-resistant decorative paper, characterized in that: The invention includes impregnated paper and a stain-resistant coating covering the outer surface of the impregnated paper. The stain-resistant coating is formed by applying a stain-resistant paint to the impregnated paper and then curing it. The stain-resistant paint comprises the following raw materials in parts by weight: 40-50 parts modified acrylic resin, 15-20 parts bisphenol A epoxy acrylate, 10-15 parts ethoxylated trimethylolpropane triacrylate, 5-9 parts nano silica, 4-8 parts nano zinc oxide, 3-5 parts polyoxyethylene ether, 2-4 parts film-forming aid, 2-4 parts photoinitiator, 5-10 parts ethyl acetate, and 20-30 parts water. The preparation method of each portion of the modified acrylic resin includes the following steps: A1. By weight, take 30-40 parts of methyl methacrylate, 6-10 parts of isooctyl acrylate, 5-9 parts of ethyl acrylate isocyanate, and 0.5-1 parts of initiator and mix them evenly to obtain mixture A; take 25-35 parts of butyl acetate, heat to 75-80℃, and under nitrogen protection, add mixture A dropwise to butyl acetate over 2-3 hours, then keep warm for 6-8 hours. During the warming period, add 0.5-1 parts of initiator every 120-150 minutes. After the reaction is complete, cool to room temperature to obtain mixture A; A2. Add 4-7 parts of perfluorooctyltrimethoxysilane, 3-6 parts of hexamethylcyclotrisiloxane, and 3-6 parts of perfluorooctyl alcohol to mixture A. Add a catalyst at 75-85℃. When the isocyanate content in the reaction system reaches more than 98% of the theoretical value, add 3-6 parts of hydroxyethyl methacrylate and 1-2 parts of hydroquinone monomethyl ether to obtain modified acrylic resin.

2. The stain-resistant decorative paper according to claim 1, characterized in that: In step A1, the initiator is at least one of azobisisobutyronitrile and azobisisoheptanenitrile.

3. The stain-resistant decorative paper according to claim 1, characterized in that: In step A2, the catalyst is at least one of stannous octoate and dibutyltin dilaurate.

4. The stain-resistant decorative paper according to claim 1, characterized in that: The film-forming aid is at least one of ethylene glycol tert-butyl ether, dipropylene glycol methyl ether, and dipropylene glycol butyl ether.

5. The stain-resistant decorative paper according to claim 1, characterized in that: The particle size of the nano-silica and nano-zinc oxide is 30-80 nm.

6. The stain-resistant decorative paper according to claim 1, characterized in that: The photoinitiator is at least one of 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenylpropanone, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

7. The stain-resistant decorative paper according to claim 1, characterized in that: The method for preparing the stain-resistant coating includes the following steps: B1. Mix modified acrylic resin, epoxy acrylic resin, ethoxylated trimethylolpropane triacrylate, nano silica, nano zinc oxide, polyoxyethylene ether and water in a certain proportion, heat to 65-70℃ and stir continuously, keep warm for 20-40 minutes to obtain mixture B. B2. Add film-forming aid, photoinitiator and ethyl acetate to mixture B, stir for 30-60 minutes, cool to room temperature to obtain stain-resistant coating.

8. A method for preparing stain-resistant decorative paper as described in any one of claims 1-7, characterized in that: Includes the following steps: (1) Apply stain-resistant coating to the surface of the impregnated paper; (2) The impregnated paper coated with stain-resistant paint is baked and then cured by ultraviolet light to obtain stain-resistant decorative paper.

9. The method for preparing stain-resistant decorative paper according to claim 8, characterized in that: In step (2), the impregnated paper coated with stain-resistant paint is baked at 60-65℃ for 5-15 minutes, and then irradiated with ultraviolet light for 10-20 minutes to obtain stain-resistant decorative paper.

Images