Glue for acrylic plate as well as preparation method and application of glue

Abstract

The invention discloses glue for an acrylic plate as well as a preparation method and application of the glue, and relates to the technical field of acrylic plate bonding. The glue for the acrylic plate is composed of a component A and a component B, and the volume ratio of the component A to the component B is (8-12): 1; the component A comprises the following raw materials: an acrylate monomer, a toughening agent, attapulgite, a stabilizer, a cross-linking agent, an anti-ultraviolet agent and a reducing agent; the component B comprises the following raw materials: a plasticizer, an oxidant and a polymerization inhibitor. The solvent-based glue which does not contain harmful solvents such as benzene, methylbenzene and xylene is obtained by compounding the A component and the B component, the A component mainly comprises the resin and the flexibilizer, and the B component mainly comprises the oxidizing agent and the plasticizer, and the solvent-based glue has rapid curing capacity and is slightly influenced by environmental humidity; the adhesive can keep stable under severe conditions of high temperature, low temperature, ultraviolet rays and the like, is resistant to acid, alkali and solvent corrosion, and is more suitable for outdoor use compared with conventional solvent type glue and conventional reaction type glue.

Description

Technical Field

[0001] The present application relates to the technical field of acrylic plate bonding, and in particular to glue for acrylic plates and a preparation method and application thereof. Background Art

[0002] Acrylic sheet, also known as organic glass, has good transparency, chemical stability, weather resistance, easy dyeing, easy processing and beautiful appearance. As people pay more and more attention to the effectiveness of advertising, acrylic sheet is widely used in advertising signs due to its good performance. Light boxes or signs made of acrylic have good light transmission, pure color, rich colors, beautiful and flat, taking into account both day and night effects, long service life, and no impact on use. With the widespread use of acrylic sheets, the use scenarios of acrylic sheets are becoming more and more abundant, and people have higher and higher requirements for their appearance and bonding effect after bonding.

[0003] Conventional acrylic panels are bonded using solvent-based glue or reactive glue. Solvent-based glue has bonding curing time and temperature limitations, and quality requirements in the bonding process are particularly important. However, existing glues have slow curing speed, easy cracking, bubbles and crystallization after bonding, which affects the overall product quality. Currently common solvent-based glues have been improved to solve the above problems, but there are still some shortcomings. For example, quick-drying glues have the problem of bubbles when the curing speed is improved; slow-drying glues have the problem of slow curing speed and long reprocessing time when the bubbles and crystallization are improved. Although the raw materials of reactive glues have good weather resistance and chemical resistance, their performance may gradually decline under long-term outdoor environmental conditions, and the glue layer may slowly age, discolor, or even partially debond, which cannot fully meet the requirements of long-term outdoor use.

[0004] Conventional acrylic sheets are widely used in outdoor advertising signs, but long-term exposure to sunlight and rain may cause corrosion to the bonding parts of the sheets, which may lead to cracking at the bonding parts, making the acrylic sheets at risk of falling off, thus posing a safety hazard. Summary of the invention

[0005] In order to solve at least one of the above technical problems, a glue for acrylic panels that can be quickly cured and has good weather resistance is developed. The present application provides a glue for acrylic panels and a preparation method and application thereof.

[0006] On the one hand, the present application provides a glue for acrylic panels, which consists of component A and component B, and the volume ratio of component A to component B is 8-12:1; The A component includes the following raw materials in parts by weight: 58-68 parts of acrylic acid ester monomer, Toughener 29~39 parts, 5-15 parts of attapulgite, Stabilizer 0.1~1 part, Cross-linking agent 0.1~5 parts, Anti-ultraviolet agent 0.1~0.5 parts, Reducing agent 0.1~5 parts; The B component includes the following raw materials by weight: Plasticizer 88~98 parts, Oxidant 1~11 parts, Inhibitor 0.1~1 part.

[0007] Optionally, the weight ratio of the toughening agent to attapulgite is 1:0.22~0.32.

[0008] Optionally, the attapulgite has a particle length of 0.2-2 μm and a particle diameter of 20-50 nm.

[0009] Optionally, in component A, the acrylic acid ester monomer is one or more of methyl methacrylate, butyl methacrylate, octyl methacrylate, cyclohexyl methacrylate, hydroxypropyl methacrylate, stearic acid acrylate, isodecyl acrylate, and lauric acid methacrylate. And / or, the toughening agent is a prepolymer or a polymer elastomer, including one or more combinations of ABS resin, SEBS resin, SBS resin, MBS resin, nitrile rubber, chloroprene rubber, and acrylic rubber; And / or, the stabilizer includes one or more combinations of hydroquinone, p-methoxyphenol, p-benzoquinone, phenothiazine, β-phenylnaphthylamine, p-tert-butylcatechol, methylene blue, and 4,4'-butylenebis(6-tert-butyl-3-methylphenol); And / or, the crosslinking agent includes one or more combinations of 1,4-butanediol dimethacrylate, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, divinylbenzene, trimethoxypropane trimethacrylate methyl, pentaerythritol triacrylate, hydroxyethyl acrylate, glycidyl acrylate, and dipropylene glycol diacrylate; And / or, the anti-ultraviolet agent includes one or more combinations of ultraviolet absorber UV-P, ultraviolet absorber UV-329, ultraviolet absorber UV-234, ultraviolet absorber UV-O and ultraviolet absorber UV-531; And / or, the reducing agent includes one or more combinations of ethylenediamine, N,N-dimethylaniline, N,N-dimethyl-p-toluidine, N,N-diethyl-p-toluidine, N,N-dihydroxyethyl-p-toluidine, N,N-dimethyl-o-toluidine, 2-methylimidazole, 2-ethyl-4-methylimidazole, 1-vinylimidazole, and diethylenetriamine.

[0010] Optionally, in component B, the plasticizer includes one or more combinations of dioctyl phthalate, diheptyl phthalate, diisooctyl phthalate, diisononyl phthalate, diisodecyl phthalate, dimethyl phthalate and dibutyl phthalate; And / or, the oxidant comprises one or more combinations of benzoyl peroxide, cumene hydroperoxide, tert-butyl hydroperoxide, dicumyl peroxide, methyl ethyl ketone peroxide, and 1,1-di(tert-butylperoxy)cyclohexane; And / or, the polymerization inhibitor includes one or more combinations of hydroquinone, p-methoxyphenol, p-benzoquinone, phenothiazine, β-phenylnaphthylamine, p-tert-butylcatechol, methylene blue, and 4,4'-butylenebis(6-tert-butyl-3-methylphenol).

[0011] In a second aspect, the present application provides a method for preparing the above-mentioned glue for acrylic panels, comprising the following steps: S1. Preparation of toughening agent During the preparation of the toughening agent, attapulgite is added and stirred evenly to disperse the attapulgite in the toughening agent; S2. Preparation of component A Mix the acrylic ester monomer with the toughening agent prepared in S1, stir at high speed until the toughening agent is completely dissolved, then add other raw materials, continue to stir and mix evenly, and obtain component A; S3. Preparation of component B The oxidant and the plasticizer are mixed, stirred at high speed until completely dissolved, and then other raw materials are added, and the mixture is stirred continuously until uniformly mixed to obtain component B; S4, Hybrid Mix component A and component B according to the proportion to obtain glue for acrylic panels.

[0012] Optionally, the toughening agent is MMA prepolymer.

[0013] In a third aspect, the present application provides application of the above-mentioned acrylic board glue in the field of outdoor acrylic boards.

[0014] In summary, the present invention includes at least one of the following beneficial technical effects: 1. A / B two-components are used, and the A component mainly composed of resin and toughening agent is compounded with the B component mainly composed of oxidant and plasticizer to obtain a solvent-based glue that does not contain harmful solvents such as benzene, toluene, and xylene. It has the ability to cure quickly and is less affected by environmental humidity. It can remain stable under harsh conditions such as high temperature, low temperature, and ultraviolet rays, and is resistant to acid, alkali, and solvent corrosion. Compared with conventional solvent-based glues and conventional reactive glues, it is more suitable for outdoor use; 2. It is safe to use, has no harmful gas and irritating odor, is easy to operate and easy to construct and solidify, and it is not easy to have bubbles and crystals during the operation; 3. On the basis of the technical solution of the present application, by adding a certain amount of attapulgite, the rapid curing ability of the glue can be improved, and the stability after outdoor use can be improved. DETAILED DESCRIPTION

[0015] The present application is further described in detail below with reference to the embodiments.

[0016] In the following examples of the present application, the main components involved, unless otherwise specified, were purchased from commercially available products.

[0017] Acrylate monomers, methyl methacrylate is used as an example; Toughening agent, exemplified by methyl methacrylate prepolymer; A stabilizer, for example hydroquinone; A crosslinking agent, exemplified by 1,4-butanediol dimethacrylate; Anti-ultraviolet agent, exemplified by ultraviolet absorber uv-234; A reducing agent, exemplified by ethylenediamine; Plasticizer, exemplified by dioctyl phthalate; An oxidizing agent, exemplified by benzoyl peroxide; As the polymerization inhibitor, hydroquinone is exemplified. Specific embodiments

[0018] Preparation Examples 1 to 5 are used to prepare component A in the two-component glue for acrylic panels of the present application, as follows.

[0019] Preparation Example 1 58 parts by weight of an acrylic acid ester monomer and 39 parts by weight of a toughening agent were mixed, and the mixture was stirred at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0020] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0021] Preparation Example 2 60 parts by weight of an acrylic acid ester monomer and 37 parts by weight of a toughening agent were mixed, and the mixture was stirred at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0022] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0023] Preparation Example 3 62 parts by weight of an acrylic acid ester monomer and 35 parts by weight of a toughening agent were mixed, and the mixture was stirred at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0024] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0025] Preparation Example 4 64 parts by weight of an acrylic acid ester monomer and 32 parts by weight of a toughening agent were mixed, and the mixture was stirred at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0026] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0027] Preparation Example 5 68 parts by weight of an acrylic acid ester monomer and 29 parts by weight of a toughening agent were mixed, and the mixture was stirred at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0028] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0029] Preparation Examples 6 to 10 are used to prepare component A in the glue for two-component acrylic panels of the present application. The difference from the above-mentioned Preparation Examples 1 to 5 is that attapulgite is added to the toughening agent in Preparation Examples 6 to 10, as follows.

[0030] Preparation Example 6 39 parts by weight of the toughening agent and 5 parts by weight of attapulgite were uniformly mixed, and 58 parts by weight of the acrylic ester monomer was added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0031] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0032] Preparation Example 7 37 parts by weight of the toughening agent and 8 parts by weight of attapulgite were mixed evenly, and 60 parts by weight of the acrylic ester monomer was added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0033] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0034] Preparation Example 8 35 parts by weight of the toughening agent and 10 parts by weight of attapulgite were evenly mixed, and 62 parts by weight of the acrylic ester monomer were added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0035] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0036] Preparation Example 9 32 parts by weight of the toughening agent and 12 parts by weight of attapulgite were uniformly mixed, and 65 parts by weight of the acrylic ester monomer was added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0037] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0038] Preparation Example 10 29 parts by weight of the toughening agent and 15 parts by weight of attapulgite were uniformly mixed, and 68 parts by weight of the acrylic ester monomer were added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0039] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0040] Preparation Examples 11 to 14 are based on Preparation Example 7, except that only the amount of attapulgite added is adjusted, as follows.

[0041] Preparation Example 11 37 parts by weight of the toughening agent and 5 parts by weight of attapulgite were uniformly mixed, and 60 parts by weight of the acrylic ester monomer was added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0042] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0043] Preparation Example 12 37 parts by weight of the toughening agent and 10 parts by weight of attapulgite were mixed evenly, and 60 parts by weight of the acrylic ester monomer was added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0044] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0045] Preparation Example 13 37 parts by weight of the toughening agent and 12 parts by weight of attapulgite were evenly mixed, and 60 parts by weight of the acrylic ester monomer was added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0046] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0047] Preparation Example 14 37 parts by weight of the toughening agent and 15 parts by weight of attapulgite were evenly mixed, and 60 parts by weight of the acrylic ester monomer was added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0048] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0049] Preparation Examples 15 to 18 are based on Preparation Example 8, except that only the amount of attapulgite added is adjusted, as follows.

[0050] Preparation Example 15 35 parts by weight of the toughening agent and 5 parts by weight of attapulgite were uniformly mixed, and 62 parts by weight of the acrylic ester monomer were added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0051] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0052] Preparation Example 16 35 parts by weight of the toughening agent and 8 parts by weight of attapulgite were uniformly mixed, and 62 parts by weight of the acrylic ester monomer were added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0053] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0054] Preparation Example 17 35 parts by weight of the toughening agent and 12 parts by weight of attapulgite were uniformly mixed, and 62 parts by weight of the acrylic ester monomer were added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0055] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0056] Preparation Example 18 35 parts by weight of the toughening agent and 15 parts by weight of attapulgite were uniformly mixed, and 62 parts by weight of the acrylic ester monomer were added, and the mixture was stirred and mixed at 1000 rpm for 5 minutes until the toughening agent was completely dissolved.

[0057] Then add 0.5 parts by weight of a stabilizer, 1.3 parts by weight of a cross-linking agent, 0.2 parts by weight of an anti-ultraviolet agent, and 1 part by weight of a reducing agent, stir for 2 hours until the mixture is uniformly mixed, and remove bubbles in vacuo to obtain component A.

[0058] Preparation Examples 19 to 23 are used to prepare component B in the two-component glue for acrylic panels of the present application, as follows.

[0059] Preparation Example 19 88 parts by weight of a plasticizer and 11 parts by weight of an oxidant were mixed in proportion, stirred at 1000 rpm for 3 minutes until they were completely dissolved and mixed uniformly, and then 1 part by weight of an inhibitor was added until they were completely mixed uniformly, and air bubbles were removed by vacuum to obtain component B.

[0060] Preparation Example 20 90 parts by weight of a plasticizer and 9 parts by weight of an oxidant were mixed in proportion, stirred at 1000 rpm for 3 minutes until they were completely dissolved and mixed uniformly, and then 1 part by weight of an inhibitor was added until they were completely mixed uniformly, and air bubbles were removed by vacuum to obtain component B.

[0061] Preparation Example 21 92 parts by weight of a plasticizer and 7 parts by weight of an oxidant were mixed in proportion, stirred at 1000 rpm for 3 minutes until they were completely dissolved and mixed uniformly, and then 1 part by weight of an inhibitor was added until they were completely mixed uniformly, and air bubbles were removed by vacuum to obtain component B.

[0062] Preparation Example 22 95 parts by weight of plasticizer and 4 parts by weight of oxidant were mixed in proportion, stirred at 1000 rpm for 3 minutes until they were completely dissolved and mixed evenly, and then 1 part by weight of inhibitor was added until they were completely mixed evenly, and air bubbles were removed by vacuum to obtain component B.

[0063] Preparation Example 23 98 parts by weight of plasticizer and 1 part by weight of oxidant were mixed in proportion, stirred at 1000 rpm for 3 minutes until they were completely dissolved and mixed evenly, and then 1 part by weight of inhibitor was added until they were completely mixed evenly, and air bubbles were removed by vacuum to obtain component B. Example 1

[0064] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 1 and component B prepared in Preparation Example 19 are mixed in a volume ratio of 10:1. Example 2

[0065] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 2 and component B prepared in Preparation Example 20 are mixed in a volume ratio of 10:1. Example 3

[0066] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 3 and component B prepared in Preparation Example 21 are mixed in a volume ratio of 10:1. Example 4

[0067] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 4 and component B prepared in Preparation Example 22 are mixed in a volume ratio of 10:1. Example 5

[0068] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 5 and component B prepared in Preparation Example 23 are mixed in a volume ratio of 10:1.

[0069] The two-component acrylic glue prepared in Examples 1 to 5 above was used to bond acrylic plates, and the curing time and curing strength tests at room temperature, UV aging tests, xenon lamp aging tests, wet heat aging tests, and salt spray corrosion tests were performed respectively; the test methods are as follows.

[0070] UV aging test conditions: UVB-313 lamp, 0.55 W / m² @ 340 nm, 60°C (dry state).

[0071] Xenon lamp aging test conditions: 0.55 W / m² @ 340 nm, 102 minutes light + 18 minutes spray, 63°C blackboard temperature.

[0072] Damp heat aging test conditions: 85°C, 85% RH (relative humidity).

[0073] Salt spray corrosion test conditions: 5% NaCl solution, 35°C, continuous spray.

[0074] The test results are shown in Table 1.

[0075] Table 1

[0076] It can be seen from Examples 1 to 5 and Table 1 that the initial curing time of the glue for acrylic panels prepared by the technical solution of the present application is 2 minutes, the full curing time is about 80 minutes, the tensile shear strength after full curing is 15 to 20 MPa, and the bonding strength retention rate in the UV aging test can reach more than 80%. In the xenon lamp aging test, the bonding strength retention rate can reach more than 85%. In the wet heat aging test, the bonding strength retention rate can reach more than 80%, and in the salt spray corrosion test, the bonding strength retention rate can reach more than 80%.

[0077] On the basis of the above technical solution, the inventors made further improvements by adding a certain amount of attapulgite powder and mixing it into the toughening agent, and made the following Examples 6 to 10 for verification, as follows. Example 6

[0078] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 6 and component B prepared in Preparation Example 19 are mixed in a volume ratio of 10:1. Example 7

[0079] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 7 and component B prepared in Preparation Example 20 are mixed in a volume ratio of 10:1. Example 8

[0080] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 8 and component B prepared in Preparation Example 21 are mixed in a volume ratio of 10:1. Example 9

[0081] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 9 and component B prepared in Preparation Example 22 are mixed in a volume ratio of 10:1. Example 10

[0082] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 10 and component B prepared in Preparation Example 23 are mixed in a volume ratio of 10:1.

[0083] The two-component acrylic sheet glue prepared in Examples 6 to 10 was used to bond acrylic sheets, and the above test was performed. The test results are shown in Table 2.

[0084] Table 2

[0085] It can be seen from Examples 6 to 10 and Table 2 that adding a certain amount of attapulgite on the basis of the technical solutions of Examples 1 to 5 can significantly reduce the initial curing time and the complete curing time, improve the fully cured tensile shear strength, and the bonding strength retention rate in the UV aging test, the bonding strength retention rate in the xenon lamp aging test, the bonding strength retention rate in the wet heat aging test, and the bonding strength retention rate in the salt spray corrosion test are significantly improved.

[0086] It can also be seen that the degree of improvement of various properties of Examples 7 and 8 is more obvious than that of other examples. In order to verify the influence of the weight ratio of the addition amount of attapulgite and the toughening agent on the performance of the glue, the inventors made the following Examples 11 to 18, which are as follows.

[0087] Among them, Examples 11 to 14 are based on Example 7, and the component A prepared in Preparation Examples 11 to 14 is used to replace the component A prepared in Preparation Example 7, as follows. Embodiment 11

[0088] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 11 and component B prepared in Preparation Example 20 are mixed in a volume ratio of 10:1. Example 12

[0089] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 12 and component B prepared in Preparation Example 20 are mixed in a volume ratio of 10:1. Embodiment 13

[0090] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 13 and component B prepared in Preparation Example 20 are mixed in a volume ratio of 10:1. Embodiment 14

[0091] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 14 and component B prepared in Preparation Example 20 are mixed in a volume ratio of 10:1.

[0092] The two-component acrylic sheet glue prepared in the above Examples 11 to 14 was respectively used to bond acrylic sheets, and the above tests were performed. The test results are shown in Table 3.

[0093] Table 3

[0094] Among them, Examples 15 to 18 are based on Example 8, and the component A prepared in Preparation Examples 15 to 18 is used to replace the component A prepared in Preparation Example 8, as follows. Embodiment 15

[0095] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 15 and component B prepared in Preparation Example 21 are mixed in a volume ratio of 10:1. Example 16

[0096] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 16 and component B prepared in Preparation Example 21 are mixed in a volume ratio of 10:1. Embodiment 17

[0097] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 17 and component B prepared in Preparation Example 21 are mixed in a volume ratio of 10:1. Embodiment 18

[0098] This example is used to prepare a two-component glue for acrylic panels. Component A prepared in Preparation Example 18 and component B prepared in Preparation Example 21 are mixed in a volume ratio of 10:1.

[0099] The two-component acrylic sheet glue prepared in the above Examples 15 to 18 was respectively used to bond acrylic sheets, and the above tests were performed. The test results are shown in Table 4.

[0100] Table 4

[0101] Through the two groups of experiments of Examples 11 to 14, Example 7 and Table 3, and Examples 15 to 18, Example 8 and Table 4, it can be seen that in the technical solution of the present application with added attapulgite, when the weight ratio of the toughening agent to the attapulgite is between 1:0.22 and 0.32, the performance of the prepared glue for acrylic panels is relatively good.

[0102] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A glue for acrylic board, characterized in that: It is composed of component A and component B, and the volume ratio of component A to component B is 8~12:1; The A component includes the following raw materials by weight: 58-68 parts of acrylic acid ester monomer, Toughener 29~39 parts, 5-15 parts of attapulgite, Stabilizer 0.1~1 part, Cross-linking agent 0.1~5 parts, Anti-ultraviolet agent 0.1~0.5 parts, Reducing agent 0.1~5 parts; The B component includes the following raw materials by weight: Plasticizer 88~98 parts, Oxidant 1~11 parts, Inhibitor 0.1~1 part.

2. The glue for acrylic sheet according to claim 1, characterized in that: The weight ratio of the toughening agent to attapulgite is 1:0.22-0.

32.

3. The glue for acrylic plate according to claim 1 or 2, characterized in that: The particle length of the attapulgite is 0.2-2 μm, and the particle diameter is 20-50 nm.

4. The glue for acrylic sheet according to claim 1, characterized in that: In component A, the acrylic acid ester monomer is one or more of methyl methacrylate, butyl methacrylate, octyl methacrylate, cyclohexyl methacrylate, hydroxypropyl methacrylate, stearic acid acrylate, isodecyl acrylate, and lauric acid methacrylate; And / or, the toughening agent is a prepolymer or a polymer elastomer, including one or more combinations of ABS resin, SEBS resin, SBS resin, MBS resin, nitrile rubber, chloroprene rubber, and acrylic rubber; And / or, the stabilizer includes one or more combinations of hydroquinone, p-methoxyphenol, p-benzoquinone, phenothiazine, β-phenylnaphthylamine, p-tert-butylcatechol, methylene blue, and 4,4'-butylenebis(6-tert-butyl-3-methylphenol); And / or, the crosslinking agent includes one or more combinations of 1,4-butanediol dimethacrylate, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, divinylbenzene, trimethoxypropane trimethacrylate methyl, pentaerythritol triacrylate, hydroxyethyl acrylate, glycidyl acrylate, and dipropylene glycol diacrylate; And / or, the anti-ultraviolet agent includes one or more combinations of ultraviolet absorber UV-P, ultraviolet absorber UV-329, ultraviolet absorber UV-234, ultraviolet absorber UV-O and ultraviolet absorber UV-531; And / or, the reducing agent includes one or more combinations of ethylenediamine, N,N-dimethylaniline, N,N-dimethyl-p-toluidine, N,N-diethyl-p-toluidine, N,N-dihydroxyethyl-p-toluidine, N,N-dimethyl-o-toluidine, 2-methylimidazole, 2-ethyl-4-methylimidazole, 1-vinylimidazole, and diethylenetriamine.

5. The glue for acrylic plate according to claim 1, characterized in that: In component B, the plasticizer includes one or more combinations of dioctyl phthalate, diheptyl phthalate, diisooctyl phthalate, diisononyl phthalate, diisodecyl phthalate, dimethyl phthalate and dibutyl phthalate; And / or, the oxidant comprises one or more combinations of benzoyl peroxide, cumene hydroperoxide, tert-butyl hydroperoxide, dicumyl peroxide, methyl ethyl ketone peroxide, and 1,1-di(tert-butylperoxy)cyclohexane; And / or, the polymerization inhibitor includes one or more combinations of hydroquinone, p-methoxyphenol, p-benzoquinone, phenothiazine, β-phenylnaphthylamine, p-tert-butylcatechol, methylene blue, and 4,4'-butylenebis(6-tert-butyl-3-methylphenol).

6. A method for preparing the glue for acrylic plates according to claim 1, characterized in that: The following steps are involved: S1. Preparation of toughening agent During the preparation of the toughening agent, attapulgite is added and stirred evenly to disperse the attapulgite in the toughening agent; S2. Preparation of component A Mix the acrylic ester monomer with the toughening agent prepared in S1, stir at high speed until the toughening agent is completely dissolved, then add other raw materials, continue to stir and mix evenly, and obtain component A; S3. Preparation of component B The oxidant and the plasticizer are mixed, stirred at high speed until completely dissolved, and then other raw materials are added, and the mixture is stirred continuously until uniformly mixed to obtain component B; S4, Hybrid Mix component A and component B according to the proportion to obtain glue for acrylic panels.

7. The preparation method according to claim 6, characterized in that: The toughening agent is MMA prepolymer.

8. Use of the acrylic sheet glue according to claim 1 in the field of outdoor acrylic sheets.

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