Water-based UV (ultraviolet) photocuring coating material and resin for preparing water-based UV photocuring coating material

Abstract

The invention relates to a water-based UV (ultraviolet) photocuring coating material and resin for preparing the water-based UV photocuring coating material, in particular to the resin for preparing the water-based UV photocuring coating material, which is characterized by being prepared by the following preparation method: 1) reacting m-xylylene diisocyanate with anhydrous polytetramethylene ether glycol to obtain an intermediate 1; 2) under the protection of nitrogen, enabling ethanolamine and methoxy polyethylene glycol acrylate to react in the presence of a catalyst to prepare an intermediate 2; and (3) adding the intermediate 1 into the step (2), and reacting to obtain the resin for preparing the water-based UV light-cured coating material, which is used for preparing the water-based UV light-cured coating material.

Description

Technical Field

[0001] The invention belongs to the technical field of coating materials, and in particular relates to a water-based UV light-curing coating material and a resin for preparing the water-based UV light-curing coating material. Background Art

[0002] UV light-curing coatings, also known as photosensitive coatings, have the advantages of low curing temperature, low volatility, and fast curing speed. They have broad application prospects in many fields, and their proportion in industrial and agricultural production and daily life is increasing.

[0003] In the prior art, water-based UV light-curing coatings have been studied. For example, CN114891178A discloses a water-based stain-resistant UV light-curing polyurethane acrylic resin and a preparation method thereof. The water-based stain-resistant UV light-curing polyurethane acrylic resin includes the following raw materials by weight: 30-40 parts of hydroxy silicone oil, 7-10 parts of isocyanate, 2-4 parts of water-based small molecule chain extender, 3-5 parts of end-capping monomer, 1-3 parts of triethylamine, 0.1-0.3 parts of dibutyltin dilaurate, and 40-60 parts of deionized water. In this patent, the introduction of organic silicon groups into the resin structure can provide flexibility and stain resistance. However, with the improvement of human living standards, the performance requirements for coating products are getting higher and higher, such as good adhesion and high oxygen index. Therefore, it is necessary to develop new water-based UV light-curing coating materials. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a water-based UV light-curing coating material and a resin for preparing the water-based UV light-curing coating material.

[0005] To achieve the purpose of the present invention, the present invention provides a resin for preparing a water-based UV light-curing coating material, which is prepared by the following preparation method: 1) reacting m-xylylene diisocyanate with anhydrous polytetramethylene ether glycol to obtain intermediate 1; 2) Under nitrogen protection, ethanolamine and methoxy polyethylene glycol acrylate are reacted in the presence of a catalyst to obtain intermediate 2; 3) In step 2), the intermediate 1 is added to react to obtain a resin for preparing a water-based UV light-curing coating material.

[0006] In some embodiments, the present invention provides a resin for preparing a water-based UV light-curable coating material, wherein the catalyst in step 2) is sodium methoxide.

[0007] In some embodiments, the present invention provides a water-based UV light-curing coating material, characterized in that it includes, in parts by weight: 40-50 parts of the above-mentioned resin for preparing the water-based UV light-curing coating material, 15-25 parts of a film-forming agent, 4-6 parts of a photoinitiator, 0.5-1 parts of a defoaming agent, 1-3 parts of an antioxidant and 20-30 parts of deionized water.

[0008] In some embodiments, the present invention provides a water-based UV light-curing coating material, characterized in that it includes, by weight: 45-50 parts of the above-mentioned resin for preparing the water-based UV light-curing coating material, 20-25 parts of a film-forming agent, 4-5 parts of a photoinitiator, 0.6-0.8 parts of a defoaming agent, 2-3 parts of an antioxidant and 25-30 parts of deionized water.

[0009] In some preferred embodiments, the present invention provides a water-based UV light-curing coating material, characterized in that it comprises, in parts by weight: 45 parts of the above-mentioned resin for preparing the water-based UV light-curing coating material, 20 parts of a film-forming agent, 5 parts of a photoinitiator, 0.7 parts of a defoaming agent, 2 parts of an antioxidant and 25-25 parts of deionized water.

[0010] In some preferred embodiments, the film-forming agent of the present invention is film-forming agent OE-300.

[0011] In some preferred embodiments, the photoinitiator described in the present invention is Irgacure819.

[0012] In some preferred embodiments, the defoaming agent of the present invention is BYK-025.

[0013] In some preferred embodiments, the antioxidant described in the present invention is antioxidant 1010.

[0014] The present invention also provides a method for preparing a water-based UV light-curing coating material, comprising: 1) Add m-xylylene diisocyanate into a reaction flask, add anhydrous polytetramethylene ether glycol dropwise, and stir to obtain intermediate 1; 2) Under nitrogen protection, ethanolamine was added to the reaction bottle, and then sodium methoxide and hydroquinone were added, heated to 70°C, and methoxy polyethylene glycol acrylate was added dropwise to react to obtain intermediate 2; intermediate 1 was added dropwise and reacted for 2 hours to obtain a resin for preparing a water-based UV light-curing coating material; 3) Weigh 40-50 parts of the resin for preparing the water-based UV light-curing coating material, 15-25 parts of the film-forming agent, 4-6 parts of the photoinitiator, 0.5-1 parts of the defoaming agent, 1-3 parts of the antioxidant and 20-30 parts of deionized water, add them into a blender for mixing and stirring at a speed of 400-600 r / min for 50-70 min. After the stirring is completed, a water-based UV light-curing coating material is obtained.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The inventors of the present invention have found that the photocurable resin prepared by the present invention has high functionality, so that the water-based UV photocurable coating material has excellent adhesion and oxygen index. DETAILED DESCRIPTION

[0016] The following representative examples are intended to better illustrate the present invention, but are not intended to limit the scope of the present invention. Unless otherwise specified, the materials used in the following examples were commercially available.

[0017] Sources of some raw materials: Water-based UV resin was purchased from Guangzhou Haoyi New Materials Technology Co., Ltd.

[0018] The above raw material manufacturer models are only specifically selected to support the raw materials in the embodiments and are adopted in the experiments. In the actual production and preparation process, the sources of raw materials are not limited to the above manufacturer models.

[0019] Preparation of resin for preparing water-based UV light-curing coating material: m-xylylene diisocyanate (37.6 g) was added into a reaction bottle, and anhydrous polytetramethylene ether glycol (350 g, treated with molecular sieves) was added dropwise, and stirred for 2 hours to obtain intermediate 1.

[0020] Under nitrogen protection, ethanolamine (13.4 g) was added to the reaction bottle, followed by sodium methoxide (0.7 g) and hydroquinone (0.7 g), heated to 70°C, methoxy polyethylene glycol acrylate (200 g) was added dropwise, and reacted for 5 hours to obtain intermediate 2. Intermediate 1 was added dropwise and reacted for 2 hours to obtain a resin for preparing a water-based UV light-curable coating material.

[0021] Embodiment 1: A water-based UV light-curing coating material, characterized in that it comprises, in parts by weight: 45 parts of the above-mentioned resin for preparing the water-based UV light-curing coating material, 20 parts of a film-forming agent, 5 parts of a photoinitiator, 0.7 parts of a defoaming agent, 2 parts of an antioxidant and 25 parts of deionized water. After weighing the above components, add them into a blender for mixing and stirring at a speed of 600 r / min and a stirring time of 60 min. After the stirring is completed, the water-based UV light-curing coating material is obtained.

[0022] Embodiment 2: A water-based UV light-curing coating material, characterized in that it comprises, in parts by weight: 50 parts of the above-mentioned resin for preparing the water-based UV light-curing coating material, 25 parts of a film-forming agent, 6 parts of a photoinitiator, 1 part of a defoaming agent, 2 parts of an antioxidant and 30 parts of deionized water. After weighing the above components, add them into a blender for mixing and stirring at a speed of 500 r / min and a stirring time of 60 min. After the stirring is completed, the water-based UV light-curing coating material is obtained.

[0023] Embodiment 3: A water-based UV light-curing coating material, characterized in that it comprises, in parts by weight: 40 parts of the above-mentioned resin for preparing the water-based UV light-curing coating material, 15 parts of a film-forming agent, 4 parts of a photoinitiator, 0.6 parts of a defoaming agent, 2 parts of an antioxidant and 20 parts of deionized water. After weighing the above components, add them into a blender for mixing and stirring at a speed of 600 r / min and a stirring time of 70 min. After the stirring is completed, the water-based UV light-curing coating material is obtained.

[0024] Comparative Example 1: A water-based UV light-curing coating material, which is similar to Example 1, except that a commercially available water-based UV resin is used instead of the resin used to prepare the water-based UV light-curing coating material.

[0025] Experimental Example Performance Test: The water-based UV light-curing coating materials prepared in Examples 1 to 3 and Comparative Example 1 were subjected to performance tests, 1) the adhesion was measured according to GB / T5219-2006, 2) the oxygen index was measured according to GB / T2406.2-2009, and the statistical results are shown in the following table: Table 1 Performance test results Example 1 Example 2 Example 3 Comparative Example 1 Adhesion (MPa) 24.0 23.8 23.3 21.0 Oxygen index (%) 59 55 58 55 Therefore, compared with the comparative example, the water-based UV light-curing coating material of the present invention has good adhesion and high oxygen index.

[0026] Although the present invention has been described in detail above, it is understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention. The invention is not restricted by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and shall be included in the protection scope of the present invention.

Claims

1. A resin for preparing a water-based UV light-curing coating material, characterized in that: It is prepared by the following preparation method: 1) reacting m-xylylene diisocyanate with anhydrous polytetramethylene ether glycol to obtain intermediate 1; 2) Under nitrogen protection, ethanolamine and methoxy polyethylene glycol acrylate are reacted in the presence of a catalyst to prepare intermediate 2; 3) In step 2), the intermediate 1 is added to react to obtain a resin for preparing a water-based UV light-curing coating material.

2. The resin for preparing a water-based UV light-curable coating material according to claim 1, characterized in that: The catalyst in step 2) is sodium methoxide.

3. The resin for preparing a water-based UV light-curable coating material according to claim 1, characterized in that: It is used to prepare water-based UV light-curing coating materials.

4. The water-based UV light-curing coating material according to claim 3, characterized in that: In parts by weight, it comprises: 40-50 parts of the resin for preparing the water-based UV light-curing coating material according to claim 1, 15-25 parts of a film-forming agent, 4-6 parts of a photoinitiator, 0.5-1 parts of a defoaming agent, 1-3 parts of an antioxidant and 20-30 parts of deionized water.

5. The water-based UV light-curing coating material according to claim 4, characterized in that: In parts by weight, it comprises: 45-50 parts of the resin for preparing the water-based UV light-curing coating material according to claim 1, 20-25 parts of a film-forming agent, 4-5 parts of a photoinitiator, 0.6-0.8 parts of a defoaming agent, 2-3 parts of an antioxidant and 25-30 parts of deionized water.

6. The water-based UV light-curable coating material according to claim 4, characterized in that: It includes: 45 -50 parts of the resin for preparing the water-based UV light-curing coating material according to claim 1, 20-25 parts of a film former, 4-5 parts of a photoinitiator, 0.6-0.8 parts of a defoaming agent, 2-3 parts of an antioxidant and 25-30 parts of deionized water.

7. The water-based UV light-curable coating material according to claim 4, characterized in that: The film-forming agent is film-forming agent OE-300.

8. The water-based UV light-curable coating material according to claim 4, characterized in that: The photoinitiator is Irgacure819.

9. The water-based UV light-curable coating material according to claim 4, characterized in that: The defoamer is BYK-025; and / or The antioxidant is antioxidant 1010.

10. The method for preparing the water-based UV light-curable coating material according to claim 4, comprising: 1) Add m-xylylene diisocyanate into a reaction flask, add anhydrous polytetramethylene ether glycol dropwise, and stir to obtain intermediate 1; 2) Under nitrogen protection, ethanolamine was added to the reaction bottle, and then sodium methoxide and hydroquinone were added, heated to 70°C, and methoxy polyethylene glycol acrylate was added dropwise to react to obtain intermediate 2; intermediate 1 was added dropwise and reacted for 2 hours to obtain a resin for preparing a water-based UV light-curing coating material; 3) Weigh 40-50 parts of the resin for preparing the water-based UV light-curing coating material obtained in step 2), 15-25 parts of a film-forming agent, 4-6 parts of a photoinitiator, 0.5-1 parts of a defoaming agent, 1-3 parts of an antioxidant and 20-30 parts of deionized water, add them into a blender for mixing and stirring at a speed of 400-600 r / min for 50-70 min. After the stirring is completed, a water-based UV light-curing coating material is obtained.