Ultra-transparent glue and BOPP (biaxially-oriented polypropylene) glazing film containing glue

Abstract

The invention relates to the technical field of high polymer materials, and particularly discloses ultra-transparent glue and a BOPP (biaxially-oriented polypropylene) glazing film containing the glue. The super transparent glue is prepared by compounding butyl acrylate, 2-ethylhexyl acrylate, triethyl citrate, vinyl acetate, octadecyl trimethyl ammonium chloride, methyl oleate, 3-methoxypropylamine, an initiator and a solvent. The method has the advantage of improving the transparency of the glue.

Description

Technical Field

[0001] The present invention relates to the field of polymer materials, and particularly to a super transparent glue and a BOPP varnish film containing the glue. Background Art

[0002] At present, the solvent-based acrylic pressure-sensitive adhesives on the market are mainly used for bonding and forming varnish film layers, and play an important role in the field of surface treatment of printed products. However, the existing glues generally have the problem of poor appearance color, usually showing yellowish or darkish, which not only reduces the aesthetics of printed products, but also easily interferes with the original printing colors during the film laminating process, resulting in a decline in visual effects. Therefore, there is still room for improvement. Summary of the Invention

[0003] In order to improve the transparency of the glue, the present application provides a super transparent glue and a BOPP varnish film containing the glue.

[0004] In the first aspect, the present application provides a super transparent glue, adopting the following technical solution: A super transparent glue, characterized in that it is compounded by butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, 3-methoxypropylamine, an initiator and a solvent.

[0005] By adopting the above technical solution, by using butyl acrylate, isooctyl acrylate and vinyl acetate as monomers, the prepared super transparent glue has a relatively transparent appearance and no obvious yellowish or darkish phenomenon. By adding triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate and 3-methoxypropylamine, the weather resistance of the high transparent glue can be improved. After long-term irradiation in sunlight, it can still maintain a transparent appearance and is not easily yellowed or darkened due to aging. The BOPP varnish film made of the super transparent glue can better and durably display the appearance of printed products, is not easily reduce the aesthetics of printed products, and has higher economic value.

[0006] Preferably, the mass ratio of butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, 3-methoxypropylamine is 13-17:8-12:23-27:0.5-0.7:1.1-1.3:0.9-1.1:0.3-0.5.

[0007] By adopting the above technical solution, by specifically selecting the mass ratios of butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, and 3-methoxypropylamine, the modification effects of triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, and 3-methoxypropylamine are better, the prepared glue is more transparent, has stronger weather resistance, is less likely to turn yellow, and can better maintain the beauty of printed matter for a long time.

[0008] Preferably, the mass ratios of butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, 3-methoxypropylamine, initiator, and solvent are 13 - 17:8 - 12:23 - 27:0.5 - 0.7:1.1 - 1.3:0.9 - 1.1:0.3 - 0.5:0.1 - 0.3:47 - 53.

[0009] By adopting the above technical solution, by specifically selecting the mass ratios of butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, 3-methoxypropylamine, initiator, and solvent, the prepared glue has good strength and better quality.

[0010] Preferably, the solvent is ethyl acetate.

[0011] By adopting the above technical solution, by specifically selecting ethyl acetate as the solvent, the monomer reaction in the glue is more sufficient, and the quality of the glue is better.

[0012] Preferably, the initiator is azobisisobutyronitrile.

[0013] By adopting the above technical solution, by specifically selecting azobisisobutyronitrile as the initiator, the phenomenon of the glue turning yellow can be better reduced, and the glue is more transparent.

[0014] Preferably, the preparation method of the super transparent glue is as follows: Step 1), mix butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, 3-methoxypropylamine, and the solvent evenly to obtain a premix; Step 2), keep stirring continuously, keep the premix at a constant temperature of 75 - 80 °C, then drop the initiator into the premix at a uniform speed. The dropping time of the initiator is 4 - 5 h. After the dropping is completed, keep the temperature at 75 - 80 °C for 1.5 - 2 h to obtain the super transparent glue.

[0015] By adopting the above technical solution, the prepared glue is not easy to turn yellow, can maintain high transparency, can better display the colors of printed matter, and reduce the impact on the appearance of printed matter.

[0016] In a second aspect, the present application provides a BOPP varnishing film containing glue, adopting the following technical solution: A BOPP varnishing film containing glue, comprising a BOPP film, with glue coated on one side of the BOPP film, and the glue being the above-mentioned super-transparent glue.

[0017] By adopting the above technical solution, the obtained BOPP varnishing film is relatively transparent, can well display the appearance and color of printed matter, and has good weather resistance. It is not easy to turn yellow or darken under long-term sunlight irradiation, making the printed matter more durable.

[0018] To sum up, the present application has the following beneficial effects: 1. Since the present application uses butyl acrylate, isooctyl acrylate, and vinyl acetate as monomers, the obtained super-transparent glue has a relatively transparent appearance and no obvious yellowing or darkening phenomenon. By adding triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, and 3-methoxypropylamine, the weather resistance of the high-transparency glue can be increased. Under long-term sunlight irradiation, it can still maintain a transparent appearance and is not easy to turn yellow or darken due to aging. The BOPP varnishing film made of the super-transparent glue can better and lastingly display the appearance of printed matter, is not easy to reduce the aesthetics of printed matter, and has higher economic value.

[0019] 2. In the present application, by specifically selecting the mass ratios of butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, and 3-methoxypropylamine, the modification effects of triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, and 3-methoxypropylamine are better. The obtained glue is more transparent, has stronger weather resistance, is less likely to turn yellow, and can better and lastingly maintain the beauty of printed matter.

[0020] 3. In the present application, by specifically selecting azobisisobutyronitrile as an initiator, the phenomenon of glue yellowing can be better reduced, making the glue more transparent. Specific Embodiments

[0021] The following further elaborates on the present application in conjunction with examples.

[0022] Example 1 A BOPP varnishing film containing glue, and the preparation method of the BOPP varnishing film containing glue is as follows: Step 1), Put 13 kg of butyl acrylate, 8 kg of isooctyl acrylate, 0.5 kg of triethyl citrate, 1.1 kg of octadecyl trimethyl ammonium chloride, 0.9 kg of methyl oleate, 0.3 kg of 3-methoxypropylamine, 23 kg of vinyl acetate, and 47 kg of ethyl acetate into the reaction kettle, with a rotation speed of 25 r / min, stir for 10 min, and mix evenly to obtain a premix.

[0023] Step 2), Keep stirring at a rotation speed of 25 r / min, keep the premix at a constant temperature of 75 °C, then slowly drop 0.1 kg of azobisisobutyronitrile into the premix at a uniform speed. The dropping time of the initiator is 4 h, and then keep it warm at 75 °C for 1.5 h to obtain a super transparent glue.

[0024] Step 3), Apply the super transparent glue on one side of the BOPP film, and then dry it at 60 °C for 10 s. The dry glue thickness is 5 μm to obtain a BOPP varnished film containing the glue.

[0025] Butyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0026] Isooctyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0027] Triethyl citrate was purchased from Shandong Yueyang New Materials Co., Ltd.

[0028] Octadecyl trimethyl ammonium chloride was purchased from Hubei Zhongnuo Yaxing Biotechnology Co., Ltd.

[0029] Methyl oleate was purchased from Shandong Shengyong Biotechnology Co., Ltd.

[0030] 3-Methoxypropylamine was purchased from Zhongshan Dixin Chemical Co., Ltd.

[0031] Vinyl acetate was purchased from Shandong Junda Chemical Co., Ltd.

[0032] Ethyl acetate was purchased from Shandong Mengkangda Chemical Co., Ltd.

[0033] Azobisisobutyronitrile was purchased from Jinan Quansheng Chemical Co., Ltd.

[0034] The BOPP film was purchased from Foshan Yitong Packaging Products Co., Ltd., with a thickness of 0.018 mm.

[0035] Example 2 A BOPP varnished film containing glue. The preparation method of the BOPP varnished film containing glue is as follows: Step 1), Put 15 kg of butyl acrylate, 10 kg of isooctyl acrylate, 0.6 kg of triethyl citrate, 1.2 kg of octadecyl trimethyl ammonium chloride, 1 kg of methyl oleate, 0.4 kg of 3-methoxypropylamine, 25 kg of vinyl acetate, and 50 kg of ethyl acetate into the reaction kettle, with a rotation speed of 28 r / min, stir for 10 min, and mix evenly to obtain a premix.

[0036] Step 2), With a rotation speed of 28 r / min, keep stirring continuously, keep the premix at a constant temperature of 78 °C, then slowly drop 0.2 kg of azobisisobutyronitrile into the premix at a uniform speed. The dropping time of the initiator is 4.5 h, and then keep it at 78 °C for heat preservation for 1.75 h to obtain super transparent glue.

[0037] Step 3), Apply the super transparent glue on one side of the BOPP film, and then dry it at 60 °C for 10 s. The dry glue thickness is 5 μm to obtain a BOPP gloss film containing glue.

[0038] Butyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0039] Isooctyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0040] Triethyl citrate was purchased from Shandong Yueyang New Materials Co., Ltd.

[0041] Octadecyl trimethyl ammonium chloride was purchased from Hubei Zhongnuoyaxing Biotechnology Co., Ltd.

[0042] Methyl oleate was purchased from Shandong Shengyong Biotechnology Co., Ltd.

[0043] 3-methoxypropylamine was purchased from Zhongshan Dixin Chemical Co., Ltd.

[0044] Vinyl acetate was purchased from Shandong Junda Chemical Co., Ltd.

[0045] Ethyl acetate was purchased from Shandong Mengkangda Chemical Co., Ltd.

[0046] Azobisisobutyronitrile was purchased from Jinan Quansheng Chemical Co., Ltd.

[0047] The BOPP film was purchased from Foshan Yitong Packaging Products Co., Ltd., with a thickness of 0.018 mm.

[0048] Example 3 A BOPP gloss film containing glue. The preparation method of the BOPP gloss film containing glue is as follows: Step 1), Put 17 kg of butyl acrylate, 12 kg of isooctyl acrylate, 0.7 kg of triethyl citrate, 1.3 kg of octadecyl trimethyl ammonium chloride, 1.1 kg of methyl oleate, 0.5 kg of 3-methoxypropylamine, 27 kg of vinyl acetate, and 53 kg of ethyl acetate into the reaction kettle, with a rotation speed of 30 r / min, stir for 10 min, and mix evenly to obtain a premix.

[0049] Step 2), Keep stirring at a rotation speed of 30 r / min, keep the premix at a constant temperature of 80 °C, then slowly drop 0.3 kg of azobisisobutyronitrile into the premix at a uniform speed. The dropping time of the initiator is 5 h, and then keep it at 80 °C for 2 h to obtain a super transparent glue.

[0050] Step 3), Apply the super transparent glue on one side of the BOPP film, and then dry it at 60 °C for 10 s. The dry glue thickness is 5 μm to obtain a BOPP varnished film containing glue.

[0051] Butyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0052] Isooctyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0053] Triethyl citrate was purchased from Shandong Yueyang New Materials Co., Ltd.

[0054] Octadecyl trimethyl ammonium chloride was purchased from Hubei Zhongnuoyaxing Biotechnology Co., Ltd.

[0055] Methyl oleate was purchased from Shandong Shengyong Biotechnology Co., Ltd.

[0056] 3-Methoxypropylamine was purchased from Zhongshan Dixin Chemical Co., Ltd.

[0057] Vinyl acetate was purchased from Shandong Junda Chemical Co., Ltd.

[0058] Ethyl acetate was purchased from Shandong Mengkangda Chemical Co., Ltd.

[0059] Azobisisobutyronitrile was purchased from Jinan Quansheng Chemical Co., Ltd.

[0060] The BOPP film was purchased from Foshan Yitong Packaging Products Co., Ltd., with a thickness of 0.018 mm.

[0061] Comparative Example 1 A BOPP varnished film containing glue. The preparation method of the BOPP varnished film containing glue is as follows: Step 1), Put 15 kg of butyl acrylate, 10 kg of isooctyl acrylate, 0.6 kg of triethanolamine, 1.2 kg of octadecyl trimethyl ammonium chloride, 1 kg of methyl oleate, 0.4 kg of 3-methoxypropylamine, 25 kg of vinyl acetate, and 50 kg of ethyl acetate into the reaction kettle, with a rotation speed of 28 r / min, stir for 10 min, and mix evenly to obtain a premix.

[0062] Step 2), Keep stirring at a rotation speed of 28 r / min, keep the premix at a constant temperature of 78 °C, then slowly drop 0.2 kg of azobisisobutyronitrile into the premix at a uniform speed. The dropping time of the initiator is 4.5 h, and then keep it warm at 78 °C for 1.75 h to obtain super transparent glue.

[0063] Step 3), Apply the super transparent glue on one side of the BOPP film, and then dry it at 60 °C for 10 s. The dry glue thickness is 5 μm to obtain a BOPP varnished film containing glue.

[0064] Butyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0065] Isooctyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0066] Triethanolamine was purchased from Jinan Qihang Chemical Technology Co., Ltd.

[0067] Octadecyl trimethyl ammonium chloride was purchased from Hubei Zhongnuoyaxing Biotechnology Co., Ltd.

[0068] Methyl oleate was purchased from Shandong Shengyong Biotechnology Co., Ltd.

[0069] 3-methoxypropylamine was purchased from Zhongshan Dixin Chemical Co., Ltd.

[0070] Vinyl acetate was purchased from Shandong Junda Chemical Co., Ltd.

[0071] Ethyl acetate was purchased from Shandong Mengkangda Chemical Co., Ltd.

[0072] Azobisisobutyronitrile was purchased from Jinan Quansheng Chemical Co., Ltd.

[0073] The BOPP film was purchased from Foshan Yitong Packaging Products Co., Ltd., with a thickness of 0.018 mm.

[0074] Comparative Example 2 A BOPP varnished film containing glue, and the preparation method of the BOPP varnished film containing glue is as follows: Step 1), Put 15 kg of butyl acrylate, 10 kg of isooctyl acrylate, 0.6 kg of triethyl citrate, 1.2 kg of coconut oil diethanolamide, 1 kg of methyl oleate, 0.4 kg of 3-methoxypropylamine, 25 kg of vinyl acetate, and 50 kg of ethyl acetate into the reaction kettle, with a rotation speed of 28 r / min, stir for 10 min, and mix evenly to obtain a premix.

[0075] Step 2), Keep stirring at a rotation speed of 28 r / min, keep the premix at a constant temperature of 78 °C, then slowly drop 0.2 kg of azobisisobutyronitrile into the premix at a uniform speed. The dropping time of the initiator is 4.5 h, and then keep it warm at 78 °C for 1.75 h to obtain super transparent glue.

[0076] Step 3), Apply the super transparent glue on one side of the BOPP film, and then dry it at 60 °C for 10 s. The dry glue thickness is 5 μm to obtain a BOPP varnishing film containing glue.

[0077] Butyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0078] Isooctyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0079] Triethyl citrate was purchased from Shandong Yueyang New Materials Co., Ltd.

[0080] Coconut oil diethanolamide was purchased from Jinan Daorong Chemical Co., Ltd.

[0081] Methyl oleate was purchased from Shandong Shengyong Biotechnology Co., Ltd.

[0082] 3-Methoxypropylamine was purchased from Zhongshan Dixin Chemical Co., Ltd.

[0083] Vinyl acetate was purchased from Shandong Junda Chemical Co., Ltd.

[0084] Ethyl acetate was purchased from Shandong Mengkangda Chemical Co., Ltd.

[0085] Azobisisobutyronitrile was purchased from Jinan Quansheng Chemical Co., Ltd.

[0086] The BOPP film was purchased from Foshan Yitong Packaging Products Co., Ltd., with a thickness of 0.018 mm.

[0087] Comparative Example 3 A BOPP varnishing film containing glue, and the preparation method of the BOPP varnishing film containing glue is as follows: Step 1), Put 15 kg of butyl acrylate, 10 kg of isooctyl acrylate, 0.6 kg of triethyl citrate, 1.2 kg of octadecyl trimethyl ammonium chloride, 1 kg of sodium dodecylbenzenesulfonate, 0.4 kg of 3-methoxypropylamine, 25 kg of vinyl acetate, and 50 kg of ethyl acetate into the reaction kettle, with a rotation speed of 28 r / min, stir for 10 min, and mix evenly to obtain a premix.

[0088] Step 2), Keep stirring at a rotation speed of 28 r / min, keep the premix at a constant temperature of 78 °C, then slowly drop 0.2 kg of azobisisobutyronitrile into the premix at a uniform speed. The dropping time of the initiator is 4.5 h, and then keep it warm at 78 °C for 1.75 h to obtain a super transparent glue.

[0089] Step 3), Coat the super transparent glue on one side of the BOPP film, and then dry it at 60 °C for 10 s. The dry glue thickness is 5 μm to obtain a BOPP varnishing film containing glue.

[0090] Butyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0091] Isooctyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0092] Triethyl citrate was purchased from Shandong Yueyang New Materials Co., Ltd.

[0093] Octadecyl trimethyl ammonium chloride was purchased from Hubei Zhongnuoyaxing Biotechnology Co., Ltd.

[0094] Sodium dodecylbenzenesulfonate was purchased from Jinan Chengmin Chemical Co., Ltd.

[0095] 3-Methoxypropylamine was purchased from Zhongshan Dixin Chemical Co., Ltd.

[0096] Vinyl acetate was purchased from Shandong Junda Chemical Co., Ltd.

[0097] Ethyl acetate was purchased from Shandong Mengkangda Chemical Co., Ltd.

[0098] Azobisisobutyronitrile was purchased from Jinan Quansheng Chemical Co., Ltd.

[0099] The BOPP film was purchased from Foshan Yitong Packaging Products Co., Ltd., with a thickness of 0.018 mm.

[0100] Comparative Example 4 A BOPP varnishing film containing glue, and the preparation method of the BOPP varnishing film containing glue is as follows: Step 1), Put 15 kg of butyl acrylate, 10 kg of isooctyl acrylate, 0.6 kg of triethyl citrate, 1.2 kg of octadecyl trimethyl ammonium chloride, 1 kg of methyl oleate, 0.4 kg of fatty alcohol polyoxyethylene ether, 25 kg of vinyl acetate, and 50 kg of ethyl acetate into the reaction kettle, with a rotation speed of 28 r / min, stir for 10 min, mix evenly to obtain a premix.

[0101] Step 2), Keep stirring at a rotation speed of 28 r / min, keep the premix at a constant temperature of 78 °C, then slowly drop 0.2 kg of azobisisobutyronitrile into the premix at a uniform speed. The dropping time of the initiator is 4.5 h, and then keep it at 78 °C for heat preservation for 1.75 h to obtain a super transparent glue.

[0102] Step 3), Apply the super transparent glue on one side of the BOPP film, and then dry it at 60 °C for 10 s. The dry glue thickness is 5 μm to obtain a BOPP varnished film containing glue.

[0103] Butyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0104] Isooctyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0105] Triethyl citrate was purchased from Shandong Yueyang New Materials Co., Ltd.

[0106] Octadecyl trimethyl ammonium chloride was purchased from Hubei Zhongnuoyaxing Biotechnology Co., Ltd.

[0107] Methyl oleate was purchased from Shandong Shengyong Biotechnology Co., Ltd.

[0108] Fatty alcohol polyoxyethylene ether was purchased from Shandong Yuquan New Material Technology Co., Ltd.

[0109] Vinyl acetate was purchased from Shandong Junda Chemical Co., Ltd.

[0110] Ethyl acetate was purchased from Shandong Mengkangda Chemical Co., Ltd.

[0111] Azobisisobutyronitrile was purchased from Jinan Quansheng Chemical Co., Ltd.

[0112] The BOPP film was purchased from Foshan Yitong Packaging Products Co., Ltd., with a thickness of 0.018 mm.

[0113] Comparative Example 5 A BOPP varnished film containing glue. The preparation method of the BOPP varnished film containing glue is as follows: Step 1): Put 15 kg of butyl acrylate, 10 kg of isooctyl acrylate, 0.6 kg of triethanolamine, 1.2 kg of coconut oil diethanolamide, 1 kg of sodium dodecylbenzenesulfonate, 0.4 kg of fatty alcohol polyoxyethylene ether, 25 kg of vinyl acetate, and 50 kg of ethyl acetate into the reaction kettle, with a rotation speed of 28 r / min, stir for 10 min, and mix evenly to obtain a premix.

[0114] Step 2): Keep stirring at a rotation speed of 28 r / min, keep the premix at a constant temperature of 78 °C, then slowly drop 0.2 kg of azobisisobutyronitrile into the premix at a uniform speed. The dropping time of the initiator is 4.5 h, and then keep it warm at 78 °C for 1.75 h to obtain the super transparent glue.

[0115] Step 3): Apply the super transparent glue on one side of the BOPP film, and then dry it at 60 °C for 10 s. The dry glue thickness is 5 μm to obtain the BOPP varnished film containing the glue.

[0116] Butyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0117] Isooctyl acrylate was purchased from Shandong Kejian Chemical Co., Ltd.

[0118] Triethanolamine was purchased from Jinan Qihang Chemical Technology Co., Ltd.

[0119] Coconut oil diethanolamide was purchased from Jinan Daorong Chemical Co., Ltd.

[0120] Sodium dodecylbenzenesulfonate was purchased from Jinan Chengmin Chemical Co., Ltd.

[0121] Fatty alcohol polyoxyethylene ether was purchased from Shandong Yuquan New Material Technology Co., Ltd.

[0122] Vinyl acetate was purchased from Shandong Junda Chemical Co., Ltd.

[0123] Ethyl acetate was purchased from Shandong Mengkangda Chemical Co., Ltd.

[0124] Azobisisobutyronitrile was purchased from Jinan Quansheng Chemical Co., Ltd.

[0125] The BOPP film was purchased from Foshan Yitong Packaging Products Co., Ltd., with a thickness of 0.018 mm.

[0126] Experiment 1 Paste the BOPP varnished film containing the glue of each example and comparative example on the white label paper to prepare the test label.

[0127] Compare the test label with the white label paper without pasting the BOPP varnished film containing the glue, and observe whether there is yellowing.

[0128] Then irradiate the label to be tested under sunlight for 90 days, and compare the label to be tested with the white label paper without the BOPP varnish containing glue pasted on it again to observe whether there is yellowing.

[0129] The specific experimental data of Experiment 1 are shown in Table 1.

[0130] Table 1 Initial appearance of the label to be tested Appearance of the label to be tested after 90 days of exposure to sunlight Example 1 No yellowing No yellowing Example 2 No yellowing No yellowing Example 3 No yellowing No yellowing Comparative example 1 No yellowing Significant yellowing Comparative example 2 No yellowing Significant yellowing Comparative example 3 No yellowing Significant yellowing Comparative example 4 No yellowing Significant yellowing Comparative example 5 No yellowing Significant yellowing and significant darkening According to the data comparison of each example and comparative example in Table 1, the glues prepared in each example and comparative example all had good transparency initially, and there was no yellowing that affected the color. However, after 90 days of exposure to the sun, the glues in each example still maintained good transparency and there was no yellowing phenomenon, while each comparative example showed significant yellowing, thus affecting the color of the label to be tested. This proves that the glue synthesized with butyl acrylate and isooctyl acrylate as monomers in each example can have high transparency, can better display the color and appearance of printed matter, and by adding triethyl citrate, octadecyl trimethyl ammonium chloride, methyl oleate, and 3-methoxypropylamine, the weather resistance of the glue can be significantly improved. Under long-term sunlight irradiation, it can still maintain a transparent form and is not easily yellowed due to aging, thus not affecting the color and appearance of printed matter.

[0131] This specific embodiment is only an explanation of the present application and does not limit the present application. Those skilled in the art can make modifications without creative contributions to this embodiment after reading this specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A super transparent glue, characterized by: It is prepared by compounding butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyltrimethylammonium chloride, methyl oleate, 3-methoxypropylamine, initiator and solvent.

2. The super transparent glue according to claim 1, characterized in that: The mass ratio of butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyltrimethylammonium chloride, methyl oleate and 3-methoxypropylamine is 13-17: 8-12: 23-27: 0.5-0.7: 1.1-1.3: 0.9-1.1: 0.3-0.

5.

3. The super transparent glue according to claim 2, characterized in that: The mass ratio of butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyltrimethylammonium chloride, methyl oleate, 3-methoxypropylamine, initiator and solvent is 13-17: 8-12: 23-27: 0.5-0.7: 1.1-1.3: 0.9-1.1: 0.3-0.5: 0.1-0.3: 47-53.

4. The super transparent glue according to claim 3, characterized in that: The solvent is ethyl acetate.

5. The super transparent glue according to claim 4, characterized in that: The initiator is azobisisobutyronitrile.

6. The super transparent glue according to any one of claims 1 to 5, characterized in that: The preparation method of the super transparent glue is as follows: Step 1), butyl acrylate, isooctyl acrylate, vinyl acetate, triethyl citrate, octadecyltrimethylammonium chloride, methyl oleate, 3-methoxypropylamine and solvent are uniformly mixed to obtain a premix; Step 2), keep stirring continuously, keep the premix at a constant temperature of 75-80°C, then drip the initiator into the premix at a uniform speed, the initiator addition time is 4-5h, after the addition is completed, keep the temperature at 75-80°C for 1.5-2h to obtain super transparent glue.

7. A BOPP glazing film containing glue, characterized in that: It comprises a BOPP film, one side of which is coated with glue, and the glue is the super transparent glue described in any one of claims 1-6.