Priming-free rewritable UV gloss oil

Abstract

The invention relates to bottoming-free rewritable UV (ultraviolet) gloss oil, which is prepared from the following raw material components in parts by weight: 10 to 30 parts of isofluor diisocyanate; 10 to 30 parts of acrylic resin; 15 to 40 parts of trimethylolpropane triacrylate; 15 to 40 parts of 1, 6-hexanediol diacrylic acid; 3 to 8 parts of benzophenone; 8 to 15 parts of a mixture of ethoxylated trimethylolpropane triacrylate and diethylamine; 0.1 to 1.5 parts of an auxiliary agent; 0.1 to 1.5 parts of polyethylene wax; wherein the auxiliary agent is selected from one or more of polyether modified polysiloxane, an acrylic acid flatting agent and a fluorocarbon modified flatting agent.

Description

Technical Field

[0001] The present application belongs to the technical field of coatings and relates to a primer-free and rewritable UV varnish. Background Art

[0002] Rewritable children's books include learning characters (Chinese characters, English words), basic math knowledge, and game boards. These books, along with a variety of pictures, make it easy for children to learn to read and add a touch of fun, significantly enhancing learning outcomes. These books are not only visually appealing but also rewritable, allowing children to enhance their memory and enjoy the joy of learning through repeated writing and erasing. Rewritable books save a significant amount of paper and contribute to environmental benefits.

[0003] Currently, such books are made rewritable by applying UV varnish on the surface. Traditional rewritable UV varnish requires a primer to be applied on the substrate first. Uneven oiling of the bottom coating will affect the oiling effect of the surface layer. Summary of the Invention

[0004] The purpose of this application is to provide a primer-free and rewritable UV varnish, which adopts a primer-free resin and can be applied with UV varnish without the need for primer, and has better adaptability to substrates and is environmentally friendly.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is to provide a primer-free and rewritable UV varnish, comprising the following raw material components by weight:

[0006] 10-30 parts of isoflurane diisocyanate;

[0007] 10-30 parts of acrylic resin;

[0008] 15-40 parts of trimethylolpropane triacrylate;

[0009] 15-40 parts of 1,6-hexanediol diacrylate;

[0010] 3-8 parts of benzophenone;

[0011] 8-15 parts of a mixture of ethoxylated trimethylolpropane triacrylate and diethylamine;

[0012] 0.1-1.5 parts of additives;

[0013] 0.1-1.5 parts of polyethylene wax;

[0014] The auxiliary agent is selected from one or more of polyether modified polysiloxane, acrylic leveling agent and fluorocarbon modified leveling agent.

[0015] The technical effect of this technical solution is that it is composed of light-curable polyurethane acrylic resin, photoinitiator, active diluent and various additives, and has the characteristics of high gloss, excellent adhesion, good repeated erasability, good wear resistance, etc. It is an excellent performance primer-free handwriting board UV varnish that can be widely used in varnishing different types of paper.

[0016] In one or more embodiments, the raw material components are preferably:

[0017] 20 parts of isoflurane diisocyanate;

[0018] 15 parts of acrylic resin;

[0019] 30 parts of trimethylolpropane triacrylate;

[0020] 18 parts of 1,6-hexanediol diacrylate;

[0021] 6 parts of benzophenone;

[0022] 12 parts of a mixture of ethoxylated trimethylolpropane triacrylate and diethylamine;

[0023] 0.5 parts of acrylic leveling agent;

[0024] 0.3 parts of polyether modified polydimethylsiloxane;

[0025] 0.2 parts of polyethylene wax.

[0026] In one or more embodiments, the preparation method of the primer-free and rewritable UV varnish is to add each raw material component into a stirring barrel in sequence and stir and mix them thoroughly at a stirring speed of 300-600 rpm to produce the primer-free and rewritable UV varnish. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions of this application in conjunction with some embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0028] Example 1

[0029] The primer-free and rewritable UV varnish of Example 1 comprises the following raw material components and their amounts in parts by weight: 20 parts of isoflurane diisocyanate; 15 parts of acrylic resin; 30 parts of trimethylolpropane triacrylate; 18 parts of 1,6-hexanediol diacrylate; 6 parts of benzophenone; 12 parts of a mixture of ethoxylated trimethylolpropane triacrylate and diethylamine, including 5 parts of ethoxylated trimethylolpropane triacrylate and 7 parts of diethylamine; 0.5 parts of an acrylate leveling agent; 0.3 parts of a polyether-modified polydimethylsiloxane; and 0.2 parts of polyethylene wax.

[0030] Under the conditions of avoiding sunlight or ultraviolet light and keeping the relative humidity of air less than 70%, slowly add each raw material component into the mixing barrel in turn and stir thoroughly until mixed evenly. During the stirring process, keep the temperature of the mixed material less than 50°C and the stirring speed at 300-600 rpm to produce a primer-free and rewritable UV varnish.

[0031] The primer-free and rewritable UV varnish prepared in this embodiment adopts a primer-free resin, does not require primer oil, is more convenient to produce, and has better adaptability to substrates, has good writing effect, is rewritable, does not shrink, does not leave marks, is not affected by the environment, and can withstand high temperatures of up to 50°C; has high gloss and fast curing speed; has a flat and smooth surface and high wear resistance; can be used in children's books and game cards, and the material selection is safer and more environmentally friendly.

[0032] Example 2

[0033] The primer-free and rewritable UV varnish of Example 2 comprises the following raw material components and their amounts in parts by weight: 25 parts of isoflurane diisocyanate; 18 parts of acrylic resin; 28 parts of trimethylolpropane triacrylate; 20 parts of 1,6-hexanediol diacrylate; 6 parts of benzophenone; 15 parts of a mixture of ethoxylated trimethylolpropane triacrylate and diethylamine, including 7 parts of ethoxylated trimethylolpropane triacrylate and 8 parts of diethylamine; 0.5 parts of an acrylate leveling agent; 0.3 parts of polyether-modified polydimethylsiloxane; and 0.2 parts of polyethylene wax.

[0034] Under the conditions of avoiding sunlight or ultraviolet light and keeping the relative humidity of air less than 70%, slowly add each raw material component into the mixing barrel in turn and stir thoroughly until mixed evenly. During the stirring process, keep the temperature of the mixed material less than 50°C and the stirring speed at 300-600 rpm to produce a primer-free and rewritable UV varnish.

[0035] Example 3

[0036] The primer-free and rewritable UV varnish of Example 2 comprises the following raw material components and their amounts in parts by weight: 18 parts of isoflurane diisocyanate; 18 parts of acrylic resin; 35 parts of trimethylolpropane triacrylate; 12 parts of 1,6-hexanediol diacrylate; 8 parts of benzophenone; 12 parts of a mixture of ethoxylated trimethylolpropane triacrylate and diethylamine, including 7 parts of ethoxylated trimethylolpropane triacrylate and 5 parts of diethylamine; 0.5 parts of an acrylate leveling agent; 0.3 parts of a polyether-modified polydimethylsiloxane; and 0.2 parts of polyethylene wax.

[0037] Under the conditions of avoiding sunlight or ultraviolet light and keeping the relative humidity of air less than 70%, slowly add each raw material component into the mixing bucket in turn and stir thoroughly until the mixture is evenly mixed. During the stirring process, keep the temperature of the mixed material less than 50°C and the stirring speed at 300-600 rpm to produce a primer-free and rewritable UV varnish.

Claims

1. A primer-free and rewritable UV varnish, characterized in that: The raw material components are as follows by weight: 10-30 parts of isoflurane diisocyanate; Acrylic resin 10-30 parts; 15-40 parts of trimethylolpropane triacrylate; 15-40 parts of 1,6-hexanediol diacrylic acid; 3-8 parts of benzophenone; 8-15 parts of a mixture of ethoxylated trimethylolpropane triacrylate and diethylamine; Additives 0.1-1.5 parts; Polyethylene wax 0.1-1.5 parts; The auxiliary agent is selected from one or more of polyether modified polysiloxane, acrylic leveling agent, and fluorocarbon modified leveling agent.

2. The primer-free and rewritable UV varnish according to claim 1, characterized in that: The raw material components are preferably: 20 parts of isoflurane diisocyanate; 15 parts of acrylic resin; 30 parts of trimethylolpropane triacrylate; 1,6-hexanediol diacrylic acid 18 parts; 6 parts of benzophenone; 12 parts of a mixture of ethoxylated trimethylolpropane triacrylate and diethylamine; 0.5 parts of acrylic leveling agent; 0.3 parts of polyether modified polydimethylsiloxane; 0.2 parts of polyethylene wax.

3. The primer-free and rewritable UV varnish according to claim 1, characterized in that: The preparation method is as follows: each raw material component is sequentially added into a stirring barrel and fully stirred and mixed evenly, and the stirring speed is 300-600 revolutions per minute, so as to produce a primer-free and repeatedly erasable UV varnish.