Transferable water-based acrylic adhesive sticker as well as preparation method and application thereof

Abstract

The invention discloses a transferable water-based acrylic adhesive sticker as well as a preparation method and application thereof. The transferable water-based acrylic adhesive sticker is prepared from the following raw materials in parts by weight: 70-140 parts of an acrylic monomer, 1-10 parts of a special monomer, 0.5-6 parts of a tackifying monomer, 4-15 parts of an emulsifier, 2-20 parts of an auxiliary agent and 80-120 parts of deionized water. The special monomer is organosiloxane, and the tackifying monomer is reactive rosin resin. The adhesive property of the adhesive sticker is improved by introducing the organosiloxane and the reactive rosin resin, the adhesive sticker has a self-cleaning effect due to the synergistic effect of the organosiloxane and the reactive rosin resin, and after the adhesive sticker is torn off during primary adhesion, the surface substance adhesion of a building wall can be reduced, so that the influence on secondary adhesion is avoided, and the adhesive sticker has the advantages that the adhesive property is improved, and the service life of the building wall is prolonged. And repeated transfer and pasting are realized.

Description

Technical Field

[0001] This invention relates to the field of adhesives, and more specifically to a transferable water-based acrylic self-adhesive, its preparation method, and its application. Background Technology

[0002] Wallpaper or wall coverings are commonly used in interior decoration. To meet environmental protection requirements, existing wallpaper or wall covering adhesives are generally made from natural plant potato starch through polymer extraction. While environmentally friendly, they have weak adhesion. Once applied to the wall and then peeled off, they cannot be easily re-attached, failing to achieve effective transferability. In practical use, wallpaper placement is crucial, making successful one-time application difficult. Multiple peeling and re-application are usually required. Existing wallpaper adhesives show a significant decrease in viscosity after repeated transfers, failing to meet the needs of multiple-transfer adhesion. Therefore, developing a reusable, environmentally friendly water-based acrylic self-adhesive is essential.

[0003] Chinese invention patent application CN116694265A discloses a self-adhesive repair label and its preparation method, which uses modified starch to improve the interfacial bonding strength of the functional powder and resin mixture system, greatly improving the temperature change resistance of the self-adhesive repair label, but it cannot achieve multiple transfers and adhesions. Chinese invention patent application CN117757408A discloses a high initial tack UV pressure-sensitive adhesive, its preparation method, and the tape itself. By limiting the weight ratio of polymer resin, rosin resin, saturated polyester resin, solid acrylic resin, and acrylic monomer, it achieves high initial tack and high repeated peel strength, but its adhesion to building walls is weak. Summary of the Invention

[0004] In order to develop a reusable and environmentally friendly water-based acrylic self-adhesive, the first aspect of the present invention provides a reusable water-based acrylic self-adhesive, the raw materials for which, by weight, include 70-140 parts of acrylic monomer, 1-10 parts of special monomer, 0.5-6 parts of tackifying monomer, 4-15 parts of emulsifier, 2-20 parts of additives, and 80-120 parts of deionized water; wherein the special monomer is an organosiloxane, and the tackifying monomer is a reactive rosin resin.

[0005] The transferable water-based acrylic self-adhesive of the present invention increases the adhesive performance by introducing organosiloxanes and reactive rosin resin. Furthermore, the synergistic effect of organosiloxanes and reactive rosin resin gives the self-adhesive a self-cleaning effect. When the adhesive is peeled off after one application, it can reduce the adhesion of materials to the surface of the building wall, thereby avoiding the impact on secondary adhesion and enabling multiple transfers and applications.

[0006] In one embodiment, the acrylic monomer includes a hard monomer, a soft monomer, and a functional monomer, wherein the weight ratio of the hard monomer, the soft monomer, and the functional monomer is (20-50):(50-80):(1-8).

[0007] In one embodiment, the hard monomer includes at least one of methyl methacrylate or ethyl acrylate.

[0008] In one embodiment, the soft monomer includes at least one of isooctyl acrylate or butyl acrylate.

[0009] In one embodiment, the functional monomer includes at least one of acrylic acid, methacrylic acid, or glycidyl acrylate.

[0010] In one embodiment, the organosiloxane is a reactive siloxane containing an alkenyl group; the organosiloxane includes at least one of vinyltriisopropoxysilane or γ-methacryloyloxypropyltris(β-trimethoxyethoxysilane).

[0011] In one embodiment, the emulsifier includes anionic emulsifier and nonionic emulsifier, wherein the weight ratio of the anionic emulsifier to the nonionic emulsifier is (3-10):(1-5).

[0012] In one embodiment, the anionic emulsifier includes at least one of sodium alkyl polyoxyethylene ether monoester sulfonate, sodium dodecyl diphenyl ether disulfonate, and sodium dodecyl sulfate.

[0013] In one embodiment, the nonionic emulsifier includes at least one of fatty alcohol polyoxyethylene ethers.

[0014] In one embodiment, the additives include at least one of buffers, initiators, neutralizers, defoamers, dispersants, and leveling agents.

[0015] In one embodiment, the adjuvant includes a buffer, an initiator, and a neutralizer.

[0016] In one embodiment, the buffer is ammonium bicarbonate.

[0017] In one embodiment, the initiator includes at least one of ammonium persulfate or sodium persulfate.

[0018] In one implementation, the neutralizing agent is ammonia.

[0019] A second aspect of the present invention provides a method for preparing a transferable waterborne acrylic self-adhesive, comprising the following steps: Mix 70% acrylic monomer, specialty monomer, thickening monomer, 80% emulsifier, and 50% deionized water, and stir to disperse until milky white to obtain a pre-emulsion. Mix the remaining acrylic monomer, remaining emulsifier, buffer and 50% deionized water, heat to 80-88℃, add 35% initiator, stir until the appearance is milky white and blue, to obtain seed emulsion; The pre-emulsion and the remaining initiator are added dropwise to the seed emulsion while stirring, and the addition is carried out at 80-85℃ for 4-5 hours. Then the temperature is raised to 85-90℃ and kept at that temperature for 1-3 hours. The temperature is then lowered to 40℃ and a neutralizing agent is added. The mixture is then filtered to obtain a transferable water-based acrylic adhesive.

[0020] A third aspect of the invention provides an application of a transferable waterborne acrylic self-adhesive for the preparation of wallpaper self-adhesive or wall covering self-adhesive.

[0021] Compared with the prior art, the present invention has the following beneficial effects: (1) The transferable waterborne acrylic self-adhesive of the present invention uses reactive rosin resin as the tackifying monomer, which can significantly improve the initial tack and peel strength, and the performance can still be maintained after 10 transfers.

[0022] (2) The transferable water-based acrylic self-adhesive of the present invention uses organosiloxane as a special monomer, which is grafted onto the main chain during the polymerization process to form a siloxane structure, reducing the adhesion of dust and dirt, achieving self-cleaning, and the siloxane chain segments provide flexibility, so that the adhesive layer deforms uniformly when peeled off, avoiding breakage or residue, thus achieving "transferability".

[0023] (3) The transferable water-based acrylic self-adhesive described in this invention balances the adhesive force and flexibility through the synergistic effect of hard monomers, soft monomers and functional monomers, ensuring high initial adhesion when first applied and easy peeling without damage during transfer.

[0024] (4) The method for preparing the transferable waterborne acrylic self-adhesive described in this invention first prepares a seed emulsion, and then simultaneously adds a pre-emulsion and an initiator, which can obtain an emulsion with uniform particle size and narrow molecular weight distribution, thereby improving the consistency of the adhesive layer performance.

[0025] (5) The transferable water-based acrylic self-adhesive described in this invention has better initial tack than traditional wallpaper glue or wall covering glue. After 10 cycles from application to peeling, the initial tack of the transferable water-based acrylic self-adhesive only shows a slight decrease. Detailed Implementation

[0026] Example A transferable water-based acrylic self-adhesive, the raw materials for which are prepared are shown in Table 1 below in parts by weight.

[0027] Table 1

[0028] The reactive rosin resin was purchased from Guangxi Tengxian Tongxuan Lixin Chemical Co., Ltd., and its brand name is TSR-6000×50.

[0029] The fatty alcohol polyoxyethylene ether was purchased from Clariant and its brand name is LCN407.

[0030] The sodium dodecyl diphenyl ether disulfonate was purchased from Dow Chemical, brand name 2A1.

[0031] A method for preparing a transferable water-based acrylic self-adhesive label includes the following steps: Mix 70% acrylic monomer, specialty monomer, thickening monomer, 80% emulsifier, and 50% deionized water, and stir and disperse for 0.5 hours until milky white to obtain a pre-emulsion. Mix the remaining acrylic monomer, remaining emulsifier, buffer and 50% deionized water, heat to 80-88℃, add 35% initiator, stir for 0.5-2h until the appearance is milky white and blue, to obtain seed emulsion; The pre-emulsion and the remaining initiator are added dropwise to the seed emulsion while stirring, and the addition is carried out at 80-85℃ for 4-5 hours. Then the temperature is raised to 85-90℃ and kept at that temperature for 1-3 hours. The temperature is then lowered to 40℃ and a neutralizing agent is added. The mixture is then filtered to obtain a transferable water-based acrylic adhesive.

[0032] Comparative Example 1 A special adhesive for wall coverings, made from modified edible starch, was purchased from Jialifeng Technology Co., Ltd., and its brand name is GG0501.

[0033] Performance testing The water-based acrylic self-adhesive labels prepared in the examples and comparative examples were cured at 130-150°C for 5 minutes to obtain water-based acrylic self-adhesive tapes.

[0034] 1. Solid content: Weigh out water-based acrylic self-adhesive using an aluminum foil box with mass M, place it in a baking oven at 150℃ for 30 minutes, and weigh it as M2; its solid content = (M2-M) / M1×100%.

[0035] 2. Viscosity: The viscosity of the aqueous acrylic self-adhesive was measured at 25°C using a rotational viscometer NDJ-5S.

[0036] 3. Appearance: Visually assess the color of the transferable water-based acrylic self-adhesive.

[0037] 4. Tg: The Tg of water-based acrylic self-adhesive was determined by DSC method.

[0038] 5. Initial tack: Refer to the standard method of GB / T 4852-2002. Roll a steel ball over the adhesive side of a water-based acrylic self-adhesive tape placed flat on an inclined plate. Evaluate the initial tack based on the maximum size of the steel ball that can be adhered to by the specified length of the adhesive side.

[0039] 6. Initial tack after 10 transfers: Stick the water-based acrylic adhesive tape to a clean wall, peel it off, and repeat this step 10 times before testing the initial tack.

[0040] 7. Peel strength at room temperature: 1) Cut the water-based acrylic self-adhesive tape into strips 25mm wide; 2) Perform a 180° peel test on a universal tensile testing machine (Beidou Precision Instruments); the tensile rate is 300mm / min.

[0041] 8. Peel strength at room temperature after 10 transfers: Stick the water-based acrylic adhesive tape to a clean wall, peel it off, and repeat this step 10 times. Then test its peel strength at room temperature.

[0042] The results of the performance tests are shown in Table 1.

[0043] Table 1

Claims

1. A transferable water-based acrylic self-adhesive, characterized in that, The raw materials for preparation include, by weight, 70-140 parts of acrylic acid monomer, 1-10 parts of special monomer, 0.5-6 parts of tackifying monomer, 4-15 parts of emulsifier, 2-20 parts of additives, and 80-120 parts of deionized water; the special monomer is an organosiloxane, and the tackifying monomer is a reactive rosin resin.

2. The transferable water-based acrylic self-adhesive according to claim 1, characterized in that, The acrylic monomers include hard monomers, soft monomers and functional monomers, and the weight ratio of the hard monomers, soft monomers and functional monomers is (20-50):(50-80):(1-8).

3. The transferable water-based acrylic self-adhesive according to claim 2, characterized in that, The hard monomer includes at least one of methyl methacrylate or ethyl acrylate.

4. The transferable water-based acrylic self-adhesive according to claim 2, characterized in that, The soft monomer includes at least one of isooctyl acrylate or butyl acrylate.

5. The transferable water-based acrylic self-adhesive according to claim 2, characterized in that, The functional monomer includes at least one of acrylic acid, methacrylic acid, or glycidyl acrylate.

6. The transferable waterborne acrylic self-adhesive according to claim 1, characterized in that, The organosiloxane is a reactive siloxane containing an alkenyl group; the organosiloxane includes at least one of vinyltriisopropoxysilane or γ-methylacryloyloxypropyltris(β-trimethoxyethoxysilane).

7. The transferable waterborne acrylic self-adhesive according to claim 1, characterized in that, The emulsifier includes anionic emulsifier and nonionic emulsifier, and the weight ratio of the anionic emulsifier to the nonionic emulsifier is (3-10):(1-5).

8. The transferable waterborne acrylic self-adhesive according to claim 1, characterized in that, The additives include at least one of buffers, initiators, neutralizers, defoamers, dispersants, and leveling agents.

9. A method for preparing the transferable waterborne acrylic self-adhesive according to claim 8, characterized in that, Includes the following steps: Mix 70% acrylic monomer, specialty monomer, thickening monomer, 80% emulsifier, and 50% deionized water, and stir to disperse until milky white to obtain a pre-emulsion. Mix the remaining acrylic monomer, remaining emulsifier, buffer and 50% deionized water, heat to 80-88℃, add 35% initiator, stir until the appearance is milky white and blue, to obtain seed emulsion; The pre-emulsion and the remaining initiator are added dropwise to the seed emulsion while stirring, and the addition is carried out at 80-85℃ for 4-5 hours. Then the temperature is raised to 85-90℃ and kept at that temperature for 1-3 hours. The temperature is then lowered to 40℃ and a neutralizing agent is added. The mixture is then filtered to obtain a transferable water-based acrylic adhesive.

10. An application of the transferable waterborne acrylic self-adhesive according to any one of claims 1-8, characterized in that, It is used in the preparation of self-adhesive wallpaper or wall coverings.

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