Preparation method of high-wear-resistance UV resin with anti-fingerprint function

Abstract

The application relates to a preparation method of high-wear-resistance UV resin with an anti-fingerprint function, which comprises the following steps: adding diisocyanate and a certain amount of a catalyst into a reactor, heating to 42-48 DEG C, then slowly adding fluorine-containing chain polyhydric alcohol into the reactor, reacting for 1.5-2.5 h to obtain product 1; adding hydroxyl acrylate and a polymerization inhibitor into the product 1, heating to 75-78 DEG C, and reacting for 2-3 h to obtain UV resin. The UV resin prepared by the application not only has high wear-resistance and anti-fouling properties, but also has good antibacterial performance.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, and in particular to a method for preparing a highly abrasion-resistant UV resin with anti-fingerprint function. Background Technology

[0002] UV resin is mainly composed of polymer monomers and prepolymers, with added photoinitiators (ultraviolet light). Under ultraviolet light of a certain wavelength (250~300nm), it will immediately undergo a polymerization reaction and complete the solidification conversion. When combined with other components, it can be made into a UV coating and applied to the surface of the product to improve the product's anti-fouling and wear-resistant properties.

[0003] Currently, with social progress, people have increasingly higher requirements for quality of life and personal health. Reducing contact with germs / viruses and avoiding their harm has become a common requirement in civilized society. 3C products such as touchscreens, CDs, monitors, and casings, which come into close contact with the human body, are frequently contaminated by external pollutants such as fingerprints, lipstick, coffee, oil stains, and germs. This not only seriously affects the product experience but also leads to the spread of germs. Therefore, coatings should not only meet the requirements of stain resistance and wear resistance but also possess antibacterial properties. UV resin is the main material for preparing UV coatings, so developing a UV resin that can give UV coatings both high stain resistance and wear resistance as well as strong antibacterial properties is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing a highly abrasion-resistant UV resin with anti-fingerprint function that can effectively solve the above-mentioned technical problems.

[0005] To achieve the objectives of this invention, the following technical solution is adopted: A method for preparing a highly abrasion-resistant UV resin with anti-fingerprint properties includes the following steps: Step 1: Add diisocyanate and a certain amount of catalyst to the reactor, heat to 42-48℃, and then slowly add fluorinated polyol to the reactor. React for 1.5-2.5 hours to obtain product 1. Step 2: Add hydroxy acrylate and polymerization inhibitor to product 1, heat to 75-78℃, and react for 2-3 hours to obtain UV resin.

[0006] Preferably, the catalyst is an epoxy-based organosilicon quaternary ammonium salt.

[0007] Preferably, the epoxy-based organosilicon quaternary ammonium salt is diethyl-2,3-epoxypropyl-[3-(methyldimethoxy)]silylpropylammonium chloride.

[0008] Preferably, the diisocyanate is selected from at least one of isophorone diisocyanate, hexamethylene diisocyanate, and dicyclohexylmethane diisocyanate.

[0009] Preferably, the structure of the fluorinated polyol is as follows: CF3CF2CF2O(CF(CF3)CF2O) n CF(CF3)-X1-(OH) m Alternatively, CF3CF2CF2O(CF2CF2CF2O) n CF2CF2-X1-OH in: n is a natural number and satisfies 2≦n≦60; m is a natural number and satisfies m≧3; X1 is a divalent organic substituent containing C, H, O, and N elements.

[0010] Preferably, the hydroxyacrylate is selected from at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, pentaerythritol triacrylate, and dipentaerythritol pentaacrylate.

[0011] Preferably, the mass ratio of each raw material in step 1 and step 2 is as follows: diisocyanate: 28-35 parts, fluorinated polyol: 13-18 parts, hydroxy acrylate: 50-60 parts, catalyst: 0.05-0.1 parts, and polymerization inhibitor: 0.05-0.1 parts.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The UV resin prepared by this invention, using epoxy organosilicon quaternary ammonium salt as a catalyst, not only improves the reactivity of diisocyanate and fluorinated polyol, enabling both to achieve a high conversion rate after maintaining at 42-48℃ for 1.5-2 hours, but also introduces fluorine and organosilicon molecules into the UV resin polymer molecular chain. The synergistic effect of fluorine and silicone molecules can effectively reduce the friction coefficient and surface energy of the resin surface, thereby giving the prepared UV resin good anti-fingerprint and wear-resistant properties. At the same time, the introduction of antibacterial groups into the UV resin polymer molecular chain gives the UV resin prepared by this invention good antibacterial properties.

[0013] In addition, the UV resin backbone of the present invention contains a large amount of active hydrogen, which can react rapidly with the peroxy free radicals formed during the oxygen inhibition process, thereby regenerating the active free radicals, effectively overcoming oxygen inhibition, and achieving rapid surface curing. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0015] The present invention provides a method for preparing a highly abrasion-resistant UV resin with anti-fingerprint function, comprising the following steps: Step 1: Add diisocyanate and a certain amount of catalyst to the reactor, heat to 42-48℃, and then slowly add fluorinated polyol to the reactor. React for 1.5-2.5 hours to obtain product 1. Step 2: Add hydroxy acrylate and polymerization inhibitor to product 1, heat to 75-78℃, and react for 2-3 hours to obtain UV resin.

[0016] The mass ratio of each raw material in the above steps is as follows: diisocyanate: 28-35 parts, fluorinated polyol: 13-18 parts, hydroxy acrylate: 50-60 parts, catalyst: 0.05-0.1 parts, and polymerization inhibitor: 0.05-0.1 parts.

[0017] The catalyst is an epoxy-based organosilicon quaternary ammonium salt; specifically, the epoxy-based organosilicon quaternary ammonium salt is preferably diethyl-2,3-epoxypropyl-[3-(methyldimethoxy)]silylpropylammonium chloride.

[0018] The diisocyanate is selected from at least one of isophorone diisocyanate, hexamethylene diisocyanate, and dicyclohexylmethane diisocyanate.

[0019] The hydroxyacrylate is selected from at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, pentaerythritol triacrylate, and dipentaerythritol pentaacrylate.

[0020] The structure of the fluorinated polyol is as follows: CF3CF2CF2O(CF(CF3)CF2O) n CF(CF3)-X1-(OH) m Alternatively, CF3CF2CF2O(CF2CF2CF2O) n CF2CF2-X1-OH in: n is a natural number and satisfies 2≦n≦60; m is a natural number and satisfies m≧3; X1 is a divalent organic substituent containing elements such as C, H, O, and N.

[0021] Example 1 A method for preparing a highly abrasion-resistant UV resin with anti-fingerprint properties, comprising the following specific steps: Step 1: 28 parts of isophorone diisocyanate and 0.05 parts of diethyl-2,3-epoxypropyl-[3-(methyldimethoxy)]silylpropylammonium chloride were added to the reactor, the temperature was raised to 42°C, and then 13 parts of perfluoropolyether triol were slowly added dropwise to the reactor. The reaction was carried out for 1.5 h to obtain product 1. Step 2: Add 50 parts of pentaerythritol triacrylate and 0.05 parts of hydroquinone as a polymerization inhibitor to product 1, heat to 75°C, and react for 2 hours to obtain UV resin-1.

[0022] Example 2 A method for preparing a highly abrasion-resistant UV resin with anti-fingerprint properties, comprising the following specific steps: Step 1: Add 31 parts of isophorone diisocyanate and 0.08 parts of diethyl-2,3-epoxypropyl-[3-(methyldimethoxy)]silylpropylammonium chloride to the reactor, heat to 45°C, and then slowly add 15 parts of perfluoropolyether triol to the reactor. React for 2 hours to obtain product 1. Step 2: Add 55 parts of pentaerythritol triacrylate and 0.08 parts of the polymerization inhibitor hydroquinone to product 1, heat to 77°C, and react for 2.5 h to obtain UV resin-2.

[0023] Example 3 A method for preparing a highly abrasion-resistant UV resin with anti-fingerprint properties, comprising the following specific steps: Step 1: Add 35 parts of isophorone diisocyanate and 0.1 parts of diethyl-2,3-epoxypropyl-[3-(methyldimethoxy)]silylpropylammonium chloride to the reactor, heat to 48°C, and then slowly add 18 parts of perfluoropolyether triol to the reactor. React for 2.5 hours to obtain product 1. Step 2: Add 60 parts of pentaerythritol triacrylate and 0.1 parts of polymerization inhibitor hydroquinone to product 1, heat to 78°C, and react for 3 hours to obtain UV resin-3.

[0024] Comparative Example The UV resin was synthesized using conventional methods in the comparative example. The specific steps are as follows: Step 1: Add 31 parts of isophorone diisocyanate and 0.08 parts of dibutyltin laurate to the reactor, heat to 45°C, and then slowly add 15 parts of perfluoropolyether triol to the reactor. React for 2 hours to obtain product 1. Step 2: Add 55 parts of hydroxyethyl acrylate and 0.08 parts of polymerization inhibitor hydroquinone to product 1, heat to 77°C, and react for 2.5 h to obtain UV resin-4.

[0025] Application performance testing The application performance of the UV resins obtained in Examples 1-3 and the comparative example was tested below. UV coatings were formulated according to the recipes shown in Table 1 (the amount of each component added is by weight), and mixed evenly by high-speed stirring. The UV coatings were then subjected to reaction and re-filtration using a 2-micron PP filter. The filtered coating was then applied to an acrylic plastic sheet using a 20-micron wire rod and baked in a 55°C forced-air drying oven for 5 minutes. Finally, the baked plastic sheet was placed on a conveyor-type UV curing machine for UV curing, using a high-pressure mercury lamp with a wavelength of 365nm. The resulting UV-coated and cured acrylic sheet was then tested, and the results are shown in Table 2.

[0026] In the table, CN9013NS represents a multifunctional polyurethane acrylate produced by Sartomer, with a functionality of 9.

[0027] As can be seen from the data in Table 2, the UV coating prepared using the UV resin of the present invention has, compared with ordinary UV coatings, not only higher wear resistance and stain resistance, but also good antibacterial properties, and the surface drying rate of the coating film is fast.

[0028] The various modifications described in these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

Claims

1. A method for preparing a highly abrasion-resistant UV resin with anti-fingerprint function, characterized in that: Includes the following steps: Step 1: Add diisocyanate and a certain amount of catalyst to the reactor, heat to 42-48℃, and then slowly add fluorinated polyol to the reactor. React for 1.5-2.5 hours to obtain product 1. Step 2: Add hydroxy acrylate and polymerization inhibitor to product 1, heat to 75-78℃, and react for 2-3 hours to obtain UV resin; the catalyst is an epoxy organosilicon quaternary ammonium salt; the epoxy organosilicon quaternary ammonium salt is diethyl-2,3-epoxypropyl-[3-(methyldimethoxy)]silylpropylammonium chloride; the fluorinated polyol is a perfluoropolyether triol.

2. The method for preparing a high abrasion-resistant UV resin with anti-fingerprint function according to claim 1, characterized in that: The diisocyanate is selected from at least one of isophorone diisocyanate, hexamethylene diisocyanate, and dicyclohexylmethane diisocyanate.

3. The method for preparing a high abrasion-resistant UV resin with anti-fingerprint function according to claim 1, characterized in that: The hydroxyacrylate is selected from at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, pentaerythritol triacrylate, and dipentaerythritol pentaacrylate.

4. The method for preparing a high abrasion-resistant UV resin with anti-fingerprint function according to claim 1, characterized in that: The mass ratio of each raw material in step 1 and step 2 is as follows: diisocyanate: 28-35 parts, fluorinated polyol: 13-18 parts, hydroxy acrylate: 50-60 parts, catalyst: 0.05-0.1 parts, and polymerization inhibitor: 0.05-0.1 parts.

Images