Light-cured resin material, manufacturing method thereof, and curing method thereof
Patent Information
- Application Number
- TW114104178
- Authority / Receiving Office
- TW · TW
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-08-16
- Estimated Expiration
- 2045-02-04
AI Technical Summary
Traditional UV-curable resin coatings for electronic device casings have a stiff feel and lack elasticity.
A photocurable resin material comprising three distinct photocurable resins, each synthesized from different polymeric resin materials and photoinitiators with varying weight ratios and curing accelerator proportions, is cured using a multi-step process involving LED, excimer, and UV light sources to form a silky smooth and elastic film.
The resulting cured film exhibits improved elasticity and smoothness compared to traditional UV-cured coatings, addressing the hardness and elasticity issues.
Smart Images
Figure TWG2TA001072035_001 
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Abstract
Description
[Technical Field]
[0001] This case relates to a light-curable resin material, its manufacturing method and its curing method. [Previous Technology]
[0002] Traditional UV-curable resin coatings use ultraviolet light instead of a heat source to cure the liquid resin coating and form a coating. UV-curable resin materials are widely used in the coating of electronic device casings.
[0003] However, the coatings formed by traditional UV-cured resin coatings have a stiff feel and lack elasticity. [Summary of the Invention]
[0004] This invention provides a photocurable resin material. This photocurable resin material comprises a first photocurable resin, a second photocurable resin, and a third photocurable resin. The first photocurable resin is synthesized from a first polymeric resin material and a first photoinitiator. The second photocurable resin is synthesized from a second polymeric resin material and a second photoinitiator. The third photocurable resin is synthesized from a third polymeric resin material and a third photoinitiator. The first, second, and third polymeric resin materials are all synthesized by reacting a first prepolymer and a second prepolymer. The first prepolymer is different from the second prepolymer, and the weight ratio of the first prepolymer to the second prepolymer in each of the first, second, and third polymeric resin materials is different. The first, second, and third photoinitiators are all synthesized by reacting a photoinitiator and a curing accelerator, and the proportion of the curing accelerator in each of the first, second, and third photoinitiators is different.
[0005] This invention also provides a manufacturing method suitable for manufacturing the aforementioned photocurable resin material. This manufacturing method includes the following steps: First, a first polymeric resin material, a second polymeric resin material, and a third polymeric resin material are synthesized by reacting a first prepolymer and a second prepolymer, wherein the weight ratio of the first prepolymer to the second prepolymer in the second polymeric resin material and the third polymeric resin material are different. Then, a first photoinitiator, a second photoinitiator, and a third photoinitiator are synthesized by reacting a photoinitiator and a curing accelerator, wherein the proportion of the curing accelerator in the first photoinitiator, the second photoinitiator, and the third photoinitiator are different. Next, a first photocurable resin is synthesized by reacting the first polymeric resin material and the first photoinitiator, a second photocurable resin is synthesized by reacting the second polymeric resin material and the second photoinitiator, and a third photocurable resin is synthesized by reacting the third polymeric resin material and the third photoinitiator. Finally, the first photocurable resin, the second photocurable resin, and the third photocurable resin are mixed to obtain a photocurable resin material.
[0006] This invention also provides a curing method suitable for curing the aforementioned photocurable resin material. This curing method includes the following steps: First, a wet film is formed on a substrate using the photocurable resin material. Then, the wet film is irradiated with a light-emitting diode (LED) light source to form a pre-cured film. Next, the pre-cured film is irradiated with an excimer light source to form a reaction-cured film. Then, the reaction-cured film is irradiated with an ultraviolet (UV) light source to form a fully cured film.
[0007] Compared with traditional UV-cured resin coatings, the cured film layer formed by the UV-cured resin material provided in this case has a silky smooth and elastic surface, which can effectively solve the shortcomings of traditional UV-cured resin coatings that have a hard feel and insufficient elasticity.
Implementation Method
[0008] The specific embodiments of this case will be described in more detail below with reference to the schematic diagrams. The advantages and features of this case will become clearer based on the following description and the scope of the patent application. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this case.
[0009] The first figure shows a flowchart of a method for manufacturing a photocurable resin material according to an embodiment of the present invention.
[0010] This light-curing resin material includes a first light-curing resin, a second light-curing resin and a third light-curing resin.
[0011] The first photocurable resin is synthesized from a first polymeric resin material and a first photoinitiator. The second photocurable resin is synthesized from a second polymeric resin material and a second photoinitiator. The third photocurable resin is synthesized from a third polymeric resin material and a third photoinitiator. The first, second, and third polymeric resin materials are all synthesized by reacting a first prepolymer and a second prepolymer. The first prepolymer is different from the second prepolymer, and the weight ratio of the first prepolymer to the second prepolymer in the first, second, and third polymeric resin materials are all different.
[0012] The first photoinitiator, the second photoinitiator and the third photoinitiator are all synthesized by reaction of a photoinitiator and a curing accelerator, and the proportion of the curing accelerator in the first photoinitiator, the second photoinitiator and the third photoinitiator is different.
[0013] This manufacturing method includes the following steps.
[0014] First, as described in step S120, a first polymer resin material, a second polymer resin material and a third polymer resin material are synthesized by reacting a first prepolymer and a second prepolymer, wherein the weight ratio of the first prepolymer to the second prepolymer in the second polymer resin material and the third polymer resin material is different.
[0015] In one embodiment, the proportion of the first prepolymer in the first polymer resin material is higher than that in the second polymer resin material, but lower than that in the third polymer resin material.
[0016] For example, the weight ratio of the first prepolymer to the second prepolymer in the second polymer resin material is 1:1, the weight ratio of the first prepolymer to the second prepolymer in the second polymer resin material is 1:2, and the weight ratio of the first prepolymer to the second prepolymer in the third polymer resin material is 2:1.
[0017] In one embodiment, the three polymer resin materials synthesized by reaction, namely the first polymer resin material, the second polymer resin material and the third polymer resin material, are stirred at high speed for 6-8 hours in a low temperature environment (<22°C), sealed and left to stand in the same environment for 12-24 hours, and then filtered with a 2000-mesh air gun to extract 80%-85% of the capacity for subsequent use.
[0018] Subsequently, as described in step S140, a first photoinitiator, a second photoinitiator, and a third photoinitiator are synthesized by reacting a photoinitiator and a curing accelerator, wherein the proportion of the curing accelerator in the first photoinitiator, the second photoinitiator, and the third photoinitiator is different.
[0019] In one embodiment, the curing accelerator has a first proportion in the first photoinitiator, a second proportion in the second photoinitiator, and a third proportion in the third photoinitiator, wherein the first proportion is lower than the second proportion, and the second proportion is lower than the third proportion. For example, the first proportion is between 40 wt% and 50 wt%, the second proportion is between 50 wt% and 60 wt%, and the third proportion is between 60 wt% and 70 wt%.
[0020] In one embodiment, the three photoinitiators synthesized by reaction, namely the first photoinitiator, the second photoinitiator and the third photoinitiator, are stirred at low speed for 30-60 minutes in a low temperature environment (<22°C) for later use.
[0021] Next, as described in step S160, a first photocurable resin is synthesized by reacting a first polymer resin material and a first photoinitiator, a second photocurable resin is synthesized by reacting a second polymer resin material and a second photoinitiator, and a third photocurable resin is synthesized by reacting a third polymer resin material and a third photoinitiator.
[0022] In one embodiment, the first photoinitiator accounts for a weight ratio of 1wt% to 5wt% in the first photocurable resin, the second photoinitiator accounts for a weight ratio of 1wt% to 5wt% in the second photocurable resin, and the third photoinitiator accounts for a weight ratio of 1wt% to 5wt% in the third photocurable resin.
[0023] In one embodiment, the first, second and third photocurable resins synthesized by the aforementioned reaction are stirred at high speed for 2-3 hours in a low temperature environment (<22°C), sealed and left to stand in the same environment for 24-36 hours, and then filtered with a 2000-mesh air gun to extract 70%-80% of the capacity for subsequent use.
[0024] Then, as described in step S180, the first light-curing resin, the second light-curing resin and the third light-curing resin are mixed to obtain a light-curing resin material.
[0025] In one embodiment, step S180 involves mixing a first photocurable resin, a second photocurable resin, a third photocurable resin, an additive, and a solvent to obtain a photocurable resin material. The additives and solvents used in the photocurable resin material are well known in the art and will not be described in detail here.
[0026] In one embodiment, the ratio of the first, second, and third photocurable resins used in step S180 is 1:1:1. However, it is not limited to this. In another embodiment, the photocurable resin material synthesized in step S180 is stirred at high speed in a low-temperature environment (<22°C) for 15-25 hours, sealed and left to stand in the same environment for >36 hours, and then filtered with a 1500-mesh air gun to obtain 65%-70% of the volume for use.
[0027] The aforementioned manufacturing method first performs step S120 to produce a first polymer resin material, a second polymer resin material, and a third polymer resin material with different component ratios, and then performs step S140 to produce a first photoinitiator, a second photoinitiator, and a third photoinitiator with different curing accelerator ratios. However, this invention is not limited to this. In other embodiments, the aforementioned steps S120 and S140 can be performed simultaneously, or step S140 can be performed first, followed by step S120.
[0028] Secondly, the aforementioned manufacturing method utilizes three polymer resin materials with different component ratios produced in step S120 (i.e., the first polymer resin material, the second polymer resin material, and the third polymer resin material) and three photoinitiators with different curing accelerator ratios produced in step S140 (i.e., the first photoinitiator, the second photoinitiator, and the third photoinitiator) to react and synthesize three photocurable resins (i.e., the first photocurable resin, the second photocurable resin, and the third photocurable resin). However, this case is not limited to this.
[0029] In other embodiments, four or more types of polymer resin materials with different component ratios can be produced first, and then four or more types of photoinitiators with different curing accelerator ratios can be combined to react and synthesize four or more types of photocurable resins.
[0030] Furthermore, in other embodiments, the three polymer resin materials produced in step S120 can be combined with the three photoinitiators produced in step S140 to produce four or more photocurable resins. For example, in addition to the process described in step S160, where a first photocurable resin is synthesized by reacting a first polymer resin material with a first photoinitiator, a second photocurable resin is synthesized by reacting a second polymer resin material with a second photoinitiator, and a third photocurable resin is synthesized by reacting a third polymer resin material with a third photoinitiator, different photocurable resins can also be synthesized by reacting a first polymer resin material with a first photoinitiator or a second photoinitiator, or by reacting a second polymer resin material with a first photoinitiator or a third photoinitiator, or by reacting a third polymer resin material with a first photoinitiator or a second photoinitiator.
[0031] Furthermore, the aforementioned embodiment uses a mixture of three photocurable resins (i.e., a first photocurable resin, a second photocurable resin, and a third photocurable resin) to obtain the photocurable resin material of this invention. However, this invention is not limited to this. In other embodiments, a wider variety of photocurable resins (e.g., four or more) can be mixed to obtain the photocurable resin material of this invention.
[0032] The second figure shows a flowchart of a method for manufacturing a light-curable resin material according to another embodiment of the present invention. This manufacturing method includes the following steps.
[0033] First, as described in step S220, a first polymeric resin material, a second polymeric resin material, and a third polymeric resin material are synthesized by reacting a first prepolymer and a second prepolymer, wherein the weight ratio of the first prepolymer to the second prepolymer in the second polymeric resin material and the third polymeric resin material is different. This step is similar to step S120 in Figure 1.
[0034] Subsequently, as described in step S240, a first photoinitiator, a second photoinitiator, and a third photoinitiator are synthesized by reacting a photoinitiator and a curing accelerator, wherein the proportion of the curing accelerator in the first photoinitiator, the second photoinitiator, and the third photoinitiator is different. This step is similar to step S140 in the first figure.
[0035] Next, as described in step S260, a first photocurable resin is synthesized by reacting a first polymeric resin material with a first photoinitiator, a second photocurable resin is synthesized by reacting a second polymeric resin material with a second photoinitiator, and a third photocurable resin is synthesized by reacting a third polymeric resin material with a third photoinitiator. This step is similar to step S160 in Figure 1.
[0036] Then, as described in step S280, the first photocurable resin, the second photocurable resin, the third photocurable resin, and a dye are mixed to obtain a photocurable resin material. Compared to the manufacturing method described in the first figure, in this invention, adding a dye to the photocurable resin material in step S280 can adjust the color of the photocurable resin material to meet the needs of actual use.
[0037] Furthermore, the manufacturing method described in the foregoing embodiments uses three types of photocurable resins (i.e., a first photocurable resin, a second photocurable resin, and a third photocurable resin) to obtain the photocurable resin material of this invention. However, this invention is not limited to this. In other embodiments, more types of photocurable resins (e.g., four or more) can be mixed to obtain the photocurable resin material of this invention.
[0038] The third figure shows a flowchart of a curing method provided according to an embodiment of this case. This curing method is suitable for curing the light-curable resin material manufactured by the manufacturing methods of the first and second figures above.
[0039] As shown in the figure, this curing method includes the following steps. First, as described in step S320, a wet film is formed on a substrate using a photocurable resin material. A wet film refers to a surface film layer in a liquid state. In one embodiment, the thickness of the wet film is between 20 and 30 micrometers.
[0040] Subsequently, as described in step S340, a pre-cured film is formed by irradiating the wet film with a light-emitting diode (LED) light source. In one embodiment, the LED light source is a visible light LED light source.
[0041] Next, as described in step S360, the pre-cured film is irradiated with an excimer light source to form a reaction-cured film. In one embodiment, the wavelength of the excimer light source is between 200 nm and 400 nm.
[0042] Then, as described in step S380, the reaction-cured film is irradiated with an ultraviolet light source to form a fully cured film. In one embodiment, the ultraviolet light source is a mercury lamp light source.
[0043] Compared to traditional UV-curable resin coatings, the cured film formed by the UV-curable resin material provided in this invention has a silky smooth and elastic surface, effectively solving the shortcomings of traditional UV-curable resin coatings, such as a hard feel and insufficient elasticity. Furthermore, the UV-curable resin material provided in this invention can be used with excimer light sources of different wavelength ranges, effectively solving the problem of instability in the excimer band.
[0044] The above is merely a preferred embodiment of this case and does not limit the scope of this case in any way. Any equivalent substitution or modification made by a person skilled in the art to the technical means and technical content disclosed in this case without departing from the scope of the technical means of this case shall be deemed as not departing from the technical means of this case and shall still fall within the protection scope of this case. [Simplified Explanation of the Diagram]
[0045] The first figure shows a flowchart of a method for manufacturing a photocurable resin material according to an embodiment of the present invention; the second figure shows a flowchart of a method for manufacturing a photocurable resin material according to another embodiment of the present invention; and the third figure shows a flowchart of a curing method according to an embodiment of the present invention.
Claims
1. A photocurable resin material, comprising: a first photocurable resin synthesized from a first polymeric resin material and a first photoinitiator; a second photocurable resin synthesized from a second polymeric resin material and a second photoinitiator; and a third photocurable resin synthesized from a third polymeric resin material and a third photoinitiator; wherein, The first, second, and third polymeric resin materials are all synthesized by reacting a first prepolymer and a second prepolymer. The first prepolymer is different from the second prepolymer, and the weight ratio of the first prepolymer to the second prepolymer in the first, second, and third polymeric resin materials is different. The first, second, and third photoinitiators are all synthesized by reacting a photoinitiator and a curing accelerator, and the proportion of the curing accelerator in the first, second, and third photoinitiators is different.
2. The photocurable resin material as described in claim 1, wherein, The curing accelerator has a first proportion in the first photoinitiator, a second proportion in the second photoinitiator, and a third proportion in the third photoinitiator, wherein the first proportion is lower than the second proportion, and the second proportion is lower than the third proportion.
3. The photocurable resin material as described in claim 2, wherein, The first percentage is between 40wt% and 50wt%, the second percentage is between 50wt% and 60wt%, and the third percentage is between 60wt% and 70wt%.
4. The photocurable resin material as described in claim 1, wherein, The proportion of the first prepolymer in the first polymer resin material is higher than that in the second polymer resin material, but lower than that in the third polymer resin material.
5. The photocurable resin material as described in claim 4, wherein, The weight ratio of the first prepolymer to the second prepolymer in the second polymer resin material is 1:1, the weight ratio of the first prepolymer to the second prepolymer in the second polymer resin material is 1:2, and the weight ratio of the first prepolymer to the second prepolymer in the third polymer resin material is 2:
1.
6. The photocurable resin material as described in claim 1 further comprises a dye.
7. The photocurable resin material as described in claim 1, wherein, The first photoinitiator accounts for 1 wt% to 5 wt% of the weight of the first photocurable resin.
8. A manufacturing method suitable for manufacturing a photocurable resin material, the manufacturing method comprising: reacting a first prepolymer and a second prepolymer to synthesize a first polymeric resin material, a second polymeric resin material, and a third polymeric resin material, wherein, The weight ratios of the first prepolymer to the second prepolymer in the second and third polymeric resin materials are different; a first photoinitiator, a second photoinitiator, and a third photoinitiator are synthesized by reacting a photoinitiator and a curing accelerator, wherein the proportion of the curing accelerator in the first, second, and third photoinitiators is different; a first photocurable resin is synthesized by reacting the first polymeric resin material and the first photoinitiator, a second photocurable resin is synthesized by reacting the second polymeric resin material and the second photoinitiator, and a third photocurable resin is synthesized by reacting the third polymeric resin material and the third photoinitiator; and the first, second, and third photocurable resins are mixed to obtain the photocurable resin material.
9. The manufacturing method as described in claim 8, wherein, The step of mixing the first, second, and third photocurable resins to obtain the photocurable resin material involves mixing the first, second, and third photocurable resins, an additive, and a solvent to obtain the photocurable resin material.
10. A curing method suitable for curing the photocurable resin material described in claim 1, the curing method comprising: forming a wet film on a substrate using the photocurable resin material; irradiating the wet film with a light-emitting diode light source to form a pre-cured film; irradiating the pre-cured film with an excimer light source to form a reaction-cured film; and irradiating the reaction-cured film with an ultraviolet light source to form a fully cured film.
11. The curing method as described in claim 10, wherein, The wavelength of this excimer light source is between 200 nm and 400 nm.
12. The curing method as described in claim 10, wherein, The ultraviolet light source is a mercury lamp.
13. The curing method as described in claim 10, wherein, The thickness of the wet film is between 20 and 30 micrometers.