Water-based oil polish with high gloss, high wear resistance and yellowing resistance

Abstract

The invention discloses a high-gloss, high-wear-resistant and yellowing-resistant water-based glazing oil, which comprises 80-90% of an acrylate copolymer emulsion; 3%-10% of an auxiliary agent; the acrylate copolymer emulsion is a styrene-acrylate copolymer, the solvent comprises water and ethanol, the mass percentage of each component is as follows: 65%-100% of water and 0%-35% of ethanol, and the mass percentage of each component comprises 10%-15% of microcrystalline wax, 10%-15% of polyethylene wax, 10%-15% of polydimethylsiloxane and 3%-15% of a multifunctional aid AMP-95. 60%-70% of polyethylene wax; 5%-15% of polydimethylsiloxane or silicone oil; according to the water-based oil polish, the raw materials of the water-based oil polish are reconfigured, so that the water-based oil polish has wear resistance, glossiness and yellowing resistance, and the quality of the water-based oil polish is improved.

Description

Technical Field

[0001] The invention relates to the technical field of inks, and in particular to a water-based varnish with high gloss, high wear resistance and yellowing resistance. Background Art

[0002] When printing paper is glazed, a layer of varnish is applied on the surface of the printed matter, and a transparent glossy layer is formed on the surface of the printed matter in combination with subsequent processes to achieve the effect of decoration and protection of the printed matter. Currently, solvent-based varnish (which pollutes the environment) and UV varnish (which is expensive) are still widely used in the market.

[0003] As people pay more attention to environmental protection, environmentally friendly water-based varnishes have received more and more attention. As their environmental protection and low price have gradually been reflected, water-based varnishes have been moving towards diversification. As consumers' requirements for paper varnishing continue to increase, especially for high-end paper products, the demand for water-based varnishes with good wear resistance and gloss and yellowing resistance is increasing. Therefore, a high-gloss, high-wear and yellowing-resistant water-based varnish is needed. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a high-gloss, high-wear-resistant and yellowing-resistant water-based varnish.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A high-gloss, high-wear-resistant and yellowing-resistant water-based varnish, the waterproof water-based varnish is prepared from the following raw materials in parts by weight: acrylic copolymer emulsion: 80%-90%; auxiliary agent: 3%-10%; solvent: 3%-15% The above technical solution further includes: The acrylic copolymer emulsion is a styrene-acrylate copolymer.

[0006] The solvent includes water and ethanol, and the mass percentage of each component is: Water: 65%-100%; Ethanol: 0%-35%.

[0007] The auxiliary agent includes microcrystalline wax, polyethylene wax, polydimethylsiloxane and multifunctional auxiliary agent AMP-95; the mass percentage of each component is: Microcrystalline wax: 10%-15%; Polyethylene wax: 60%-70%; Polydimethylsiloxane or silicone oil: 5%-15%; Multifunctional additive AMP-95: 5%-10%.

[0008] The present invention has the following beneficial effects: In the present invention, the raw materials of the water-based glazing oil are reconfigured so that the water-based glazing oil has abrasion resistance, glossiness and yellowing resistance, thereby improving the quality of the water-based glazing oil. Implementation

[0009] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0010] The preparation process of the waterproof water-based varnish described in the present invention is as follows: Step 1: Weigh the raw materials by weight, first add the acrylic copolymer emulsion into the reaction kettle and heat and stir, the stirring paddle speed is 600-800r / min, and the stirring and dispersing time is continuous for 1-2h.

[0011] Step 2: Mix water and ethanol, microcrystalline wax, polyethylene wax and polydimethylsiloxane or silicone oil evenly, stir in a reactor at 60-70℃ and a stirring paddle speed of 1500-1800r / min for 10-15min, and stir the multifunctional additive AMP-95 at a stirring paddle speed of 1200-1500r / min for 15-30min. Use 3# Caien cup to detect the viscosity of the aqueous varnish liquid, and use a 1:1 mixture of water and ethanol to adjust the viscosity of the aqueous varnish liquid; for single concave and roll concave varnishing: the viscosity on the machine is (3# Caien cup) 20-25 seconds; for flexographic rubber cloth and offset printing online varnishing: the viscosity on the machine is (3# Caien cup) 50-55 seconds. Adjust the indicators to get the aqueous varnish; The steps of filling the high-gloss and wear-resistant water-based varnish are as follows: A: Pour the water-based glazing oil after standing into a filter barrel for filtering, introduce the filtered water-based glazing oil into a barrel, seal the barrel, and obtain a water-based glazing oil product.

[0012] This product is a water-based emulsion type universal varnish, composed of acrylic copolymer emulsion, additives, water, ethanol, etc.

[0013] Through gravure printing, offset printing, infrared drying, it is suitable for glazing various papers and printing substrates. This product has good glazing brightness and excellent wear resistance. After glazing, it can be overprinted with various UV inks and solvent-based inks, and can also be hot stamped. This product complies with the relevant EU environmental protection standards and the relevant requirements of the national tobacco industry for the limit of harmful substances. Example

[0014] The percentage of styrene-acrylate copolymer: water: ethanol: microcrystalline wax: polyethylene wax: polydimethylsiloxane is 80:15:1:2:7:1, and the total mass of each substance is 100. Start the disperser, make the dispersant at a speed of 200-300 revolutions per minute, add 800 units of styrene-acrylate copolymer, 150 units of water and 10 units of ethanol into the disperser. Continue dispersing at a speed of 1000-1200 revolutions per minute for 30 minutes to completely disperse the styrene-acrylate copolymer to obtain an emulsion.

[0015] The reactor is opened and the stirring device of the reactor is set at a speed of 200-400 revolutions per minute. 13 units of microcrystalline wax, 75 units of polyethylene wax and 12 units of polydimethylsiloxane are added to the reactor in sequence.

[0016] After all three additives were added, the rotation speed of the stirring device of the reaction kettle was adjusted to 1300-1500 revolutions per minute, and the stirring was continued for 30 minutes. Then, the solution was allowed to stand for 30 minutes to obtain a water-based varnish.

[0017] After standing, check the viscosity of the solution in the reactor. Different viscosities of water-based varnish are required according to the properties of different printed products. For single concave and roll concave varnishing, the viscosity on the machine tested by 3# Caien cup is 20-25 seconds; for flexographic rubber cloth and offset printing inline varnishing, the viscosity on the machine tested by 3# Caien cup is 50-55 seconds. Depending on the printing method, the viscosity can be adjusted by mixing water and ethanol in a ratio of 1:1.

[0018] The water-based glazing oil is liquidized after standing and passed into the filter to obtain a high-gloss, high-wear-resistant and yellowing-resistant water-based glazing oil product. Example

[0019] The percentage of styrene-acrylate copolymer: water: ethanol: microcrystalline wax: polyethylene wax: polydimethylsiloxane is: 90:4:1:1:3:5, and the total mass of each substance is 100% The disperser is turned on, the dispersant is at a speed of 200-300 revolutions per minute, and 900 units of styrene-acrylate copolymer, 40 units of water and 10 units of ethanol are added to the disperser. After all the materials are added, the speed of the disperser is adjusted to 1000-1200 revolutions per minute, and the dispersion is continued for 30 minutes, and then for 30 minutes, the styrene-acrylate copolymer is completely dispersed to obtain an emulsion.

[0020] The prepared aqueous varnish base liquid is stirred at a speed of 200-400 revolutions per minute in the reaction kettle. 9 units of microcrystalline wax, 36 units of polyethylene wax and 5 units of polydimethylsiloxane are added to the reaction kettle in sequence.

[0021] After all three additives were added, the rotation speed of the stirring device of the reaction kettle was adjusted to 1300-1500 revolutions per minute, and the stirring was continued for 30 minutes. Then, the solution was allowed to stand for 30 minutes to obtain a water-based varnish liquid.

[0022] After standing, check the viscosity of the solution in the reactor. Different viscosities of water-based varnish are required according to the properties of different printed products. For single concave and roll concave varnishing, the viscosity on the machine tested by 3# Caien cup is 18-20 seconds; for flexographic rubber cloth and offset printing inline varnishing, the viscosity on the machine tested by 3# Caien cup is 40-45 seconds. Depending on the printing method, the viscosity can be adjusted with a 1:1 mixture of water and ethanol.

[0023] The water-based glazing oil is liquidized after standing and passed into a filter to obtain a high-gloss, highly wear-resistant and yellowing-resistant water-based glazing oil product.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-gloss, high-wear-resistant and yellowing-resistant water-based glazing oil, characterized in that: Including acrylic copolymer emulsion: 80%-90%; additives: 3%-10%; solvents: 3%-15%.

2. The high-gloss, high-wear-resistant and yellowing-resistant water-based varnish according to claim 1, characterized in that: The acrylic copolymer emulsion is a styrene-acrylate copolymer.

3. The high-gloss, high-wear-resistant and yellowing-resistant water-based varnish according to claim 1, characterized in that: The solvent includes water and ethanol, and the mass percentages of the components are: water: 65%-100%, ethanol: 0%-35%.

4. The high-gloss, high-wear-resistant and yellowing-resistant water-based varnish according to claim 1, characterized in that: The auxiliary agents include microcrystalline wax, polyethylene wax, polydimethylsiloxane and auxiliary agent multifunctional auxiliary agent AMP-95.

5. The high-gloss, high-wear-resistant and yellowing-resistant water-based varnish according to claim 4, characterized in that: The content of microcrystalline wax in the auxiliary agent is 10%-15%.

6. The high-gloss, high-wear-resistant and yellowing-resistant water-based varnish according to claim 4, characterized in that: The content of polyethylene wax in the auxiliary agent is 60%-70%.

7. The high-gloss, high-wear-resistant and yellowing-resistant water-based varnish according to claim 4, characterized in that: The content of polydimethylsiloxane in the auxiliary agent is 5%-15%.

8. The high-gloss, high-wear-resistant and yellowing-resistant water-based varnish according to claim 4, characterized in that: The content of the additive multifunctional additive AMP-95 is 5%-10%.