UV glue for cutting UTG glass and preparation method thereof

Abstract

The invention relates to UV glue for UTG glass cutting and a preparation method thereof.The UV glue is prepared from, by weight, 30-50 parts of matrix resin, 20-40 parts of reactive diluent, 3-8 parts of photoinitiator, 2-5 parts of adhesion promoter, 0.2-0.5 part of flatting agent and 0.2-0.5 part of defoaming agent; the matrix resin is a mixture of epoxy acrylate and urethane acrylate, and the mass ratio of the epoxy acrylate to the urethane acrylate is (2-4): (1-3). By optimizing the composition and proportion of the matrix resin and adding the adhesion promoter gamma-aminopropyl methyl diethoxy silane, the UV glue has good adhesive property with the UTG glass, can effectively fix the UTG glass in the cutting process, prevents the glass from shifting, ensures the cutting precision, and has the advantages of simple preparation process, low cost and high production efficiency. By adopting the compound photoinitiator in a specific proportion, polymerization reaction can be quickly initiated under ultraviolet light with different wavelengths, so that the glue is cured in a short time, the processing period is greatly shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of UTG glass technology, specifically to a UV adhesive for UTG glass cutting and its preparation method. Background Technology

[0002] UTG glass, or ultra-thin flexible glass, is widely used in flexible displays and other fields due to its advantages such as high flexibility, high light transmittance, and high chemical stability. Cutting is one of the key processes in UTG glass manufacturing. To ensure cutting precision and quality, specialized UV adhesives are used to fix and protect the UTG glass.

[0003] Existing UV adhesives for glass cutting still have some problems in practical applications. For example, some adhesives lack sufficient tack, failing to effectively secure UTG glass during cutting, leading to glass displacement and affecting cutting accuracy; some adhesives cure slowly, extending processing cycles and reducing production efficiency; and some adhesives, after curing, have poor peel performance from UTG glass, easily leaving adhesive residue on the glass surface, requiring additional cleaning processes and increasing production costs. Therefore, developing a UV adhesive for UTG glass cutting with high tack, rapid curing, and good peel performance is of significant practical importance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a UV adhesive for UTG glass cutting and its preparation method, thereby solving the aforementioned problems. The UV adhesive of this invention has advantages such as high viscosity, rapid curing, and good peeling properties, which can meet the requirements of UTG glass cutting and improve cutting accuracy and production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a UV adhesive for UTG glass cutting, comprising the following components by weight: The main resin consists of 30-50 parts, reactive diluent of 20-40 parts, photoinitiator of 3-8 parts, adhesion promoter of 2-5 parts, leveling agent of 0.2-0.5 parts, and defoamer of 0.2-0.5 parts. The main resin is a mixture of epoxy acrylate and polyurethane acrylate, and the mass ratio of epoxy acrylate to polyurethane acrylate is (2-4):(1-3). The adhesion promoter is γ-aminopropylmethyldiethoxysilane; The leveling agent is a polyether-modified polydimethylsiloxane containing acrylate functional groups; The defoamer is a non-aqueous emulsion of defoaming polysiloxane.

[0006] Preferably, the reactive diluent is a mixture of isoborneol acrylate and laurate acrylate, and the mass ratio of isoborneol acrylate to laurate acrylate is (3-5):(1-2).

[0007] Preferably, the photoinitiator is a mixture of 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinbenzylphenyl)butanone and 2-isopropylthioxanthone, and the mass ratio of the three is (3-5):(2-4):(1-3).

[0008] Preferably, the mass ratio of epoxy acrylate to polyurethane acrylate is (3-4):(1-2).

[0009] Preferably, the mass ratio of isoborneol acrylate to laurate acrylate is (4-5):(1.5-2).

[0010] Preferably, the mass ratio of 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinbenzylphenyl)butanone and 2-isopropylthioxanthone is (4-5):(3-4):(2-3).

[0011] A method for preparing a UV adhesive for UTG glass cutting includes the following steps: (1) According to the above formula, accurately weigh the main resin, reactive diluent, photoinitiator, adhesion promoter, leveling agent and defoamer; (2) Add the main resin and reactive diluent weighed in step (1) to the reactor and stir at 200-300 r / min for 30-60 min at room temperature until they are mixed evenly; (3) Add photoinitiator, adhesion promoter, leveling agent and defoamer to the mixture in step (2) in sequence, and continue to stir at a speed of 150-250 r / min for 60-90 min until the mixture is uniform; (4) Filter the mixture obtained in step (3) through a filter to remove impurities and undissolved particles, and obtain UV glue for UTG glass cutting.

[0012] Furthermore, in step (2), the stirring speed is 250-300 r / min and the stirring time is 40-50 min.

[0013] Furthermore, in step (3), the stirring speed is 200-250 r / min and the stirring time is 70-80 min.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. This invention optimizes the composition and ratio of the main resin and adds the adhesion promoter γ-aminopropylmethyldiethoxysilane, enabling the UV adhesive of this invention to have excellent adhesion to UTG glass. This effectively fixes the UTG glass during cutting, preventing glass displacement and ensuring cutting accuracy. The use of a specific ratio of compounded photoinitiators allows for rapid polymerization under different wavelengths of ultraviolet light, enabling the adhesive to cure quickly, significantly shortening the processing cycle and improving production efficiency.

[0015] 2. The UV adhesive of this invention exhibits excellent peel performance from UTG glass after curing. After cutting, the adhesive can be easily peeled off the glass surface without leaving any residue, eliminating the need for additional cleaning and reducing production costs. The appropriate selection and proportioning of the reactive diluent, along with the addition of leveling agents and defoamers, gives the UV adhesive of this invention excellent flowability, leveling properties, and transparency. After curing, it possesses good hardness, flexibility, and impact resistance, meeting various requirements for UTG glass cutting. Attached Figure Description

[0016] Figure 1 This is a flowchart of a method for preparing a UV adhesive for UTG glass cutting according to the present invention; Figure 2 This is a comparison chart of the absorption spectrum and curing efficiency of the photoinitiator of this invention; Figure 3 This is a comparison diagram of the performance of the UV adhesive of this invention before and after curing; Figure 4 This is a comparison chart of the formulations and performance of different embodiments of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-4 The UV adhesive for UTG glass cutting in this embodiment comprises the following components by weight: Main resin: 30-50 parts, the main resin is a mixture of epoxy acrylate and polyurethane acrylate, wherein the mass ratio of epoxy acrylate to polyurethane acrylate is (2-4):(1-3). Epoxy acrylate has good adhesion and hardness, while polyurethane acrylate has excellent flexibility and impact resistance. The combination of the two enables the UV adhesive to have good comprehensive performance after curing.

[0019] Reactive diluent: 20-40 parts. The reactive diluent is a mixture of isoborneol acrylate and laurate acrylate, wherein the mass ratio of isoborneol acrylate to laurate acrylate is (3-5):(1-2). The reactive diluent can reduce the viscosity of the adhesive, improve its fluidity, and participate in the curing reaction to increase the crosslinking density of the adhesive, thereby improving the performance of the adhesive.

[0020] Photoinitiator: 3-8 parts, the photoinitiator being a mixture of 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinbenzylphenyl)butanone, and 2-isopropylthioxanthanone, wherein the mass ratio of 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinbenzylphenyl)butanone, and 2-isopropylthioxanthanone is (3-5):(2-4):(1-3). This compounded photoinitiator can initiate polymerization reactions under ultraviolet light of different wavelengths, improving the curing speed and degree of curing of the adhesive.

[0021] Adhesion promoter: 2-5 parts, the adhesion promoter is γ-aminopropylmethyldiethoxysilane. One end of γ-aminopropylmethyldiethoxysilane can react with the silanol groups on the surface of inorganic materials, such as UTG glass, to form a covalent bond; the other end can form a covalent bond with the main resin, thereby firmly bonding the UTG glass and the adhesive and improving the adhesion between the adhesive and the UTG glass.

[0022] Leveling agent: 0.2-0.5 parts. The leveling agent is a polyether-modified polydimethylsiloxane containing acrylate functional groups. The leveling agent can improve the leveling properties of the adhesive, making the adhesive evenly distributed on the UTG glass surface, avoiding defects such as flow marks and bubbles, and improving the coating quality of the adhesive.

[0023] Defoamer: 0.2-0.5 parts. The defoamer is a non-aqueous emulsion of defoaming polysiloxane. The defoamer effectively eliminates air bubbles generated during the mixing and coating process of the adhesive, improving the transparency and cured performance of the adhesive.

[0024] The present invention discloses a method for preparing a UV adhesive for UTG glass cutting, comprising the following steps: Weigh each component according to the proportions: Accurately weigh the main resin, reactive diluent, photoinitiator, adhesion promoter, leveling agent, and defoamer according to the above formula.

[0025] Mixing: Add the weighed main resin and reactive diluent to the reactor, stir and mix evenly at room temperature, with a stirring speed of 200-300 r / min and a stirring time of 30-60 min.

[0026] Add photoinitiator, adhesion promoter, leveling agent and defoamer: Add the photoinitiator, adhesion promoter, leveling agent and defoamer to the above mixture in sequence, and continue to stir and mix evenly. The stirring speed is 150-250 r / min and the stirring time is 60-90 min.

[0027] Filtration: The mixed adhesive is filtered through a filter to remove impurities and undissolved particles, resulting in UV adhesive for UTG glass cutting.

[0028] Example 1 I. Preparation of UV Adhesive Weigh the following components according to the specified proportions: 24 parts epoxy acrylate, 12 parts polyurethane acrylate, 24 parts isobornyl acrylate, 6 parts lauric acid acrylate, 3 parts 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, 2 parts 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, 1 part 2-isopropylthioxanthone, 2 parts γ-aminopropylmethyldiethoxysilane, 0.2 parts polyether-modified polydimethylsiloxane containing acrylate functional groups, and 0.2 parts non-aqueous emulsion of defoaming polysiloxane.

[0029] Mixing: Add epoxy acrylate and polyurethane acrylate to the reactor and stir at 200 r / min for 30 min at room temperature.

[0030] Add photoinitiator, adhesion promoter, leveling agent and defoamer: Add photoinitiator, γ-aminopropylmethyldiethoxysilane, polyether-modified polydimethylsiloxane containing acrylate functional groups and defoaming polysiloxane non-aqueous emulsion in sequence, and continue to stir and mix at 150 r / min for 60 min.

[0031] Filtration: The mixed adhesive is filtered through a filter to obtain UV adhesive for UTG glass cutting.

[0032] II. Performance Testing Adhesion test: The peel strength test method was used. The UV adhesive of the present invention was applied to the surface of UTG glass and bonded to another piece of UTG glass. After curing, a peel test was performed. The peel strength was measured to be 5 N / cm, indicating that the adhesive has good adhesion and can effectively fix the UTG glass.

[0033] Curing speed test: The adhesive was applied to the surface of UTG glass and irradiated under a UV lamp with a wavelength of 365nm. The curing of the adhesive was observed. It was found that the adhesive could be completely cured within 30 seconds. The curing speed is fast and can meet the requirements of production efficiency.

[0034] Peel performance test: The cured adhesive was peeled off the UTG glass surface and the glass surface was observed to see if there was any adhesive residue. The results showed that there was no adhesive residue on the glass surface and the peel performance was good.

[0035] Example 2 I. Preparation of UV Adhesive Weigh the following components according to the specified proportions: 32 parts epoxy acrylate, 8 parts polyurethane acrylate, 30 parts isobornyl acrylate, 10 parts lauric acid acrylate, 4 parts 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, 3 parts 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, 2 parts 2-isopropylthioxanthraquinone, 3 parts γ-aminopropylmethyldiethoxysilane, 0.3 parts polyether-modified polydimethylsiloxane containing acrylate functional groups, and 0.3 parts non-aqueous emulsion of defoaming polysiloxane.

[0036] Mixing: Add epoxy acrylate and polyurethane acrylate to the reactor and mix at 250 r / min for 45 min at room temperature.

[0037] Add photoinitiator, adhesion promoter, leveling agent and defoamer: Add photoinitiator, γ-aminopropylmethyldiethoxysilane, polyether-modified polydimethylsiloxane containing acrylate functional groups and defoaming polysiloxane non-aqueous emulsion in sequence, and continue to stir and mix at 200 r / min for 75 min.

[0038] Filtration: The mixed adhesive is filtered through a filter to obtain UV adhesive for UTG glass cutting.

[0039] II. Performance Testing Adhesion test: Using the same peel strength test method, the peel strength was measured to be 6 N / cm, indicating good adhesion.

[0040] Curing speed test: Under UV light with a wavelength of 365nm, the adhesive was completely cured within 25 seconds, which is fast.

[0041] Peeling performance test: No adhesive residue remained on the glass surface after peeling, indicating excellent peeling performance.

[0042] Example 3 I. Preparation of UV Adhesive Weigh the following components according to the proportions: 40 parts epoxy acrylate, 10 parts polyurethane acrylate, 36 parts isobornyl acrylate, 12 parts lauric acid acrylate, 5 parts 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, 4 parts 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, 3 parts 2-isopropylthioxanthraquinone, 5 parts γ-aminopropylmethyldiethoxysilane, 0.5 parts polyether-modified polydimethylsiloxane containing acrylate functional groups, and 0.5 parts non-aqueous emulsion of defoaming polysiloxane.

[0043] Mixing: Add epoxy acrylate and polyurethane acrylate to the reactor and mix at 300 r / min for 60 min at room temperature.

[0044] Add photoinitiator, adhesion promoter, leveling agent and defoamer: Add photoinitiator, γ-aminopropylmethyldiethoxysilane, polyether-modified polydimethylsiloxane containing acrylate functional groups and defoaming polysiloxane non-aqueous emulsion in sequence, and continue to stir and mix at 250 r / min for 90 min.

[0045] Filtration: The mixed adhesive is filtered through a filter to obtain UV adhesive for UTG glass cutting.

[0046] II. Performance Testing Adhesion test: The peel strength was measured to be 7 N / cm, indicating high adhesion.

[0047] Curing speed test: Under UV light with a wavelength of 365nm, the adhesive was completely cured within 20 seconds, which is extremely fast.

[0048] Peeling performance test: No adhesive residue remained on the glass surface after peeling, indicating good peeling performance.

[0049] Comparative Example 1 I. Preparation of UV Adhesive Weigh the following components according to the specified proportions: 40 parts epoxy acrylate, 30 parts isobornyl acrylate, 10 parts laurate acrylate, 3 parts 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, 2 parts 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinbenzylphenyl)butanone, 1 part 2-isopropylthioxanthraquinone, 0.2 parts polyether-modified polydimethylsiloxane containing acrylate functional groups, and 0.2 parts non-aqueous emulsion of defoaming polysiloxane. Polyurethane acrylate and adhesion promoter γ-aminopropylmethyldiethoxysilane were not added to this comparative example.

[0050] Mixing: Add epoxy acrylate, isobornyl acrylate and laurate acrylate to the reactor and stir at 200 r / min for 30 min at room temperature.

[0051] Add photoinitiator, leveling agent and defoamer: Add photoinitiator, non-aqueous emulsion of polyether modified polydimethylsiloxane containing acrylate functional groups and defoaming polysiloxane in sequence, and continue to stir and mix at 150 r / min for 60 min.

[0052] Filtration: The mixed adhesive is filtered through a filter to obtain UV adhesive for UTG glass cutting.

[0053] II. Performance Testing Adhesion test: The peel strength test method was used, and the peel strength was measured to be 3 N / cm. The adhesion was significantly lower than that of Examples 1-3.

[0054] Curing speed test: Under UV light with a wavelength of 365nm, the adhesive was completely cured within 40 seconds, which is a relatively slow curing speed.

[0055] Peeling performance test: A small amount of adhesive residue remained on the glass surface after peeling, indicating poor peeling performance.

[0056] Comparative Example 2 I. Preparation of UV Adhesive Weigh the following components according to the specified proportions: 20 parts epoxy acrylate, 10 parts polyurethane acrylate, 20 parts isobornyl acrylate, 10 parts laurate acrylate, 1 part 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, 1 part 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinbenzylphenyl)butanone, 1 part 2-isopropylthioxanthone, 2 parts γ-aminopropylmethyldiethoxysilane, 0.2 parts polyether-modified polydimethylsiloxane containing acrylate functional groups, and 0.2 parts non-aqueous emulsion of defoaming polysiloxane. The amount and proportion of photoinitiator in this comparative example differ from those in Example 1.

[0057] Mixing: Epoxy acrylate, polyurethane acrylate, isobornyl acrylate and lauric acid acrylate are added to the reaction vessel and stirred at 200 r / min for 30 min at room temperature.

[0058] Add photoinitiator, adhesion promoter, leveling agent and defoamer: Add photoinitiator, γ-aminopropylmethyldiethoxysilane, polyether-modified polydimethylsiloxane containing acrylate functional groups and defoaming polysiloxane non-aqueous emulsion in sequence, and continue to stir and mix at 150 r / min for 60 min.

[0059] Filtration: The mixed adhesive is filtered through a filter to obtain UV adhesive for UTG glass cutting.

[0060] II. Performance Testing Adhesion test: The peel strength was measured to be 4 N / cm, which is lower than that of Examples 1-3.

[0061] Curing speed test: Under UV light with a wavelength of 365nm, the adhesive was completely cured within 50 seconds, which is a relatively slow curing speed.

[0062] Peeling performance test: A small amount of adhesive residue remained on the glass surface after peeling, indicating poor peeling performance.

[0063] In summary, by comparing Examples 1, 2, and 3 with Comparative Examples 1 and 2, it can be seen that the present invention, through optimizing the formulation and preparation method, enables the UV adhesive to have advantages such as high viscosity, rapid curing, and good peel performance, which can effectively solve the problems existing in the prior art and has significant progress and practicality.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A UV adhesive for UTG glass cutting, characterized in that, By weight, it includes the following components: The main resin consists of 30-50 parts, reactive diluent of 20-40 parts, photoinitiator of 3-8 parts, adhesion promoter of 2-5 parts, leveling agent of 0.2-0.5 parts, and defoamer of 0.2-0.5 parts. The main resin is a mixture of epoxy acrylate and polyurethane acrylate, and the mass ratio of epoxy acrylate to polyurethane acrylate is (2-4):(1-3). The adhesion promoter is γ-aminopropylmethyldiethoxysilane; The leveling agent is a polyether-modified polydimethylsiloxane containing acrylate functional groups; The defoamer is a non-aqueous emulsion of defoaming polysiloxane.

2. The UV adhesive for UTG glass cutting according to claim 1, characterized in that, The active diluent is a mixture of isoborneol acrylate and laurate acrylate, and the mass ratio of isoborneol acrylate to laurate acrylate is (3-5):(1-2).

3. The UV adhesive for UTG glass cutting according to claim 1, characterized in that, The photoinitiator is a mixture of 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinbenzylphenyl)butanone and 2-isopropylthioxanthone, and the mass ratio of the three is (3-5):(2-4):(1-3).

4. The UV adhesive for UTG glass cutting according to claim 1, characterized in that, The mass ratio of epoxy acrylate to polyurethane acrylate is (3-4):(1-2).

5. The UV adhesive for UTG glass cutting according to claim 2, characterized in that, The mass ratio of isoborneol acrylate to laurate acrylate is (4-5):(1.5-2).

6. The UV adhesive for UTG glass cutting and its preparation method according to claim 3, characterized in that, The mass ratio of 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinbenzylphenyl)butanone and 2-isopropylthioxanthone is (4-5):(3-4):(2-3).

7. A method for preparing a UV adhesive for UTG glass cutting, characterized in that, Includes the following steps: (1) According to any one of the formulations in claims 1-6, accurately weigh the main resin, reactive diluent, photoinitiator, adhesion promoter, leveling agent and defoamer; (2) Add the main resin and reactive diluent weighed in step (1) to the reactor and stir at 200-300 r / min for 30-60 min at room temperature until they are mixed evenly; (3) Add photoinitiator, adhesion promoter, leveling agent and defoamer to the mixture in step (2) in sequence, and continue to stir at a speed of 150-250 r / min for 60-90 min until the mixture is uniform; (4) Filter the mixture obtained in step (3) through a filter to remove impurities and undissolved particles, and obtain UV glue for UTG glass cutting.

8. The method for preparing a UV adhesive for UTG glass cutting according to claim 7, characterized in that, In step (2), the stirring speed is 250-300 r / min and the stirring time is 40-50 min.

9. A method for preparing a UV adhesive for UTG glass cutting according to claim 7, characterized in that, In step (3), the stirring speed is 200-250 r / min and the stirring time is 70-80 min.

Images