Bonding glue for bonding mosaic net and preparation method of bonding glue

Abstract

The invention relates to the technical field of bonding glue, in particular to bonding glue for bonding a mosaic net and a preparation method of the bonding glue. The styrene-acrylic emulsion is prepared from the following components in parts by weight: 0.5 to 1.5 parts of acrylic acid, 15 to 30 parts of acrylate, 0.5 to 1.5 parts of rheological modifier, 15 to 35 parts of styrene, 0.5 to 2 parts of emulsifier, 0.1 to 0.35 part of initiator and 40 to 60 parts of purified water; the rheological modifier is polymethyl acrylate and / or long-chain alkyl alcohol polyoxyethylene ether methacrylate; the emulsifier is a nonionic emulsifier and / or an anionic emulsifier; the initiator is an inorganic peroxide initiator and / or a tertiary butyl initiator. The styrene-acrylic emulsion is improved, and the rheology improver is introduced, so that the adhesive can be used for a long time in a high-temperature, high-humidity and long-term soaking environment.

Description

Technical Field

[0001] The invention relates to the technical field of technical adhesives, and in particular to an adhesive for bonding mosaic nets and a preparation method thereof. Background Art

[0002] Mosaic is an ancient decorative art form that can create exquisite patterns and designs by using small pieces of materials in different colors and shapes; the more common ones are ceramic mosaics, marble mosaics, glass mosaics, etc. In order to better show the uniformity and beauty of the gaps in the materials and the pattern effect, and for the convenience of construction, it is necessary to use other materials to connect the mosaics. Common mosaic connection methods are paper mosaics and mesh mosaics.

[0003] Paper mosaics belong to the first generation of products, but they have disadvantages such as poor water resistance, easy to fall off, and cumbersome construction. The second generation of mesh mosaics has surpassed paper mosaics in terms of construction convenience and bonding performance. Currently on the market, mosaics are mostly used for the decoration of hotel baths, bathing area walls and sauna room walls. In these usage scenarios, mosaics need to be in a high temperature, high humidity and long-term water immersion environment for a long time. The adhesive of the mosaic is prone to cracking, causing the mosaic to fall off. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides an adhesive for bonding mosaic mesh and a preparation method thereof, which can be immersed in high-temperature hot water for a long time and can be used for a long time in a high-temperature and high-humidity environment without falling off.

[0005] In order to solve the above problems, the present invention proposes an adhesive for bonding mosaic meshes, wherein the adhesive comprises a styrene acrylic emulsion, characterized in that the styrene acrylic emulsion comprises the following components in parts by weight:

[0006]

[0007]

[0008] The rheology modifier is polymethyl acrylate and / or long-chain alkyl alcohol polyoxyethylene ether methacrylate;

[0009] The emulsifier is a nonionic emulsifier and / or an anionic emulsifier;

[0010] The initiator is an inorganic peroxide initiator and / or a tert-butyl initiator.

[0011] As an improvement of the above technical solution, the long-chain alkyl alcohol polyoxyethylene ether methacrylate is behenyl polyoxyethylene ether methacrylate or octadecyl polyoxyethylene ether methacrylate;

[0012] The polymerization degree of the polymethyl acrylate is 10-18.

[0013] As an improvement of the above technical solution, the rheology modifier is a mixture of behenyl alcohol polyoxyethylene ether methacrylate and polymethyl acrylate, and the degree of polymerization of the polymethyl acrylate is 14;

[0014] The weight ratio of the behenyl alcohol polyoxyethylene ether methacrylate to the polymethyl acrylate is (2-3): (3-6);

[0015] The viscosity of the rheology modifier is 0.7-1.2 mPa·s at 25°C.

[0016] As an improvement of the above technical solution, the acrylic acid ester is one or more of butyl acrylate, octyl acrylate, and methyl methacrylate;

[0017] The inorganic peroxide initiator is sodium persulfate and / or ammonium persulfate; the tert-butyl initiator is di-tert-butyl peroxide and / or tert-butyl hydroperoxide.

[0018] As an improvement of the above technical solution, the styrene-acrylic emulsion further comprises the following components in parts by weight:

[0019]

[0020] The reducing agent is sodium dithionite or sodium dithionite;

[0021] The pH regulator is ammonia water and / or sodium hydroxide;

[0022] The defoamer is emulsified silicone oil or emulsified mineral oil;

[0023] The preservative is 2-methyl-4-isothiazoline-3-one or 2-methyl-5-chloro-4-isothiazoline-3-one.

[0024] As an improvement of the above technical solution, the adhesive comprises an auxiliary additive and the styrene-acrylic emulsion, and the weight of the styrene-acrylic emulsion is 0.7-1.2 times the weight of the auxiliary additive;

[0025] The auxiliary additives include the following components in parts by weight:

[0026] Multifunctional amine additive 0.05-0.15 parts by weight

[0027] Silane coupling agent 0.5-1 parts by weight

[0028] Thickener 1-4 parts by weight

[0029] Bactericide 0.05-0.15 weight part

[0030] 40-50 parts by weight of purified water

[0031] The thickener is carbomer and / or polyacrylic acid;

[0032] The bactericide is triadimefon and / or MBS-56.

[0033] As an improvement of the above technical solution, the styrene acrylic emulsion has a solid content of 45-50% and a viscosity of 1000-1500 mPa·s at 25°C;

[0034] The adhesive to which the auxiliary additive is added has a viscosity of 29000-35000 mPa·s at 25°C.

[0035] Accordingly, the present invention also provides a method for preparing the adhesive as described above, comprising the following steps:

[0036] S1, adding 20-30wt% of pure water, 10-50wt% of emulsifier and 0.5-1.5 parts by weight of rheology modifier into an emulsifying kettle, stirring and emulsifying;

[0037] S2, adding 15-35 parts by weight of styrene, 0.5-1.5 parts by weight of acrylic acid, and 15-30 parts by weight of acrylic acid ester simultaneously into an emulsifying kettle, stirring to obtain a premixed slurry;

[0038] S3, adding the remaining purified water and the remaining emulsifier into the reaction kettle, heating to 70-95°C, taking 1-15wt% of the premixed slurry and dropping it into the reaction kettle, immediately adding 40-60wt% of the inorganic peroxide initiator in the formula after the addition is completed, stirring at 85-95°C for 15-40min, and then continuing to drop the remaining premixed slurry and the remaining inorganic peroxide initiator, and after the addition is completed, keeping warm at 80-90°C for 1-2h;

[0039] S4, after the insulation is completed, 0.01-0.1 parts by weight of tert-butyl initiator is added to the reaction kettle and stirred;

[0040] S5, cooling, filtering, discharging, and obtaining a bonding adhesive containing styrene acrylic emulsion;

[0041] Wherein, the formula amount of the pure water is 40-60 parts by weight, and the formula amount of the emulsifier is 0.5-2 parts by weight.

[0042] As an improvement of the above technical solution, step S4 further includes the following steps:

[0043] S41, adding 0.01-0.1 parts by weight of a reducing agent into a reaction kettle and stirring;

[0044] S42, cooling the reaction kettle to 25-45° C., adding a pH adjuster, adjusting the pH value to 8-9.5, and then adding 0.1-0.5 parts by weight of a preservative and 0.1-0.5 parts by weight of a defoamer, stirring evenly, to obtain a styrene-acrylic emulsion;

[0045] The reducing agent is sodium dithionite and / or sodium dithionite;

[0046] The pH regulator is ammonia water and / or sodium hydroxide;

[0047] The defoamer is emulsified silicone oil or emulsified mineral oil;

[0048] The preservative is 2-methyl-4-isothiazoline-3-one and / or 2-methyl-5-chloro-4-isothiazoline-3-one.

[0049] As an improvement of the above technical solution, step S4 also includes the following steps:

[0050] S43, adding a multifunctional amine auxiliary agent to 40-50 parts by weight of pure water until the pH value reaches 9-10 to obtain a reaction solvent;

[0051] S44, adding 0.5-1 parts by weight of a silane coupling agent, 1-4 parts by weight of a thickener and 0.05-0.15 parts by weight of a bactericide to the reaction solvent, and stirring to obtain an auxiliary additive;

[0052] S45, mixing the filtered styrene-acrylic emulsion with the auxiliary additive and stirring evenly; wherein the weight of the styrene-acrylic emulsion is 0.7-1.2 times the weight of the auxiliary additive;

[0053] The thickener is carbomer and / or polyacrylic acid;

[0054] The bactericide is formaldehyde releaser and / or MBS-56

[0055] The implementation of the present invention has the following beneficial effects:

[0056] The present invention improves the formula of mosaic adhesive, introduces a new rheology modifier into the styrene acrylic emulsion, and the rheology modifier is polymethyl acrylate and / or long-chain alkyl alcohol polyoxyethylene ether methacrylate. The rheology modifier improves the viscosity, water resistance and stability of the styrene acrylic emulsion under high temperature by participating in emulsion polymerization, so that the adhesive containing the styrene acrylic emulsion can be immersed in high-temperature water for a long time or used in a high-humidity and high-temperature environment for a long time without cracking or falling off, and has the characteristics of good water resistance and high temperature resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1This is a flow chart of the preparation of an adhesive for bonding a mosaic mesh according to an embodiment of the present invention;

[0058] Figure 2 yes Figure 1 Specific preparation flow chart of step S4 in FIG. DETAILED DESCRIPTION

[0059] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0060] The embodiment of the present invention provides an adhesive for bonding mosaic meshes, wherein the adhesive comprises a styrene acrylic emulsion, and the styrene acrylic emulsion comprises the following components in parts by weight:

[0061]

[0062] The rheology modifier is polymethyl acrylate and / or long-chain alkyl alcohol polyoxyethylene ether methacrylate;

[0063] The emulsifier is a nonionic emulsifier and / or an anionic emulsifier;

[0064] The initiator is an inorganic peroxide initiator and / or a tert-butyl initiator.

[0065] Specifically, the acrylic acid ester is one or more of butyl acrylate, octyl acrylate, and methyl methacrylate.

[0066] Long-chain alkyl alcohol polyoxyethylene ether methacrylate, which can be selected from behenyl polyoxyethylene ether methacrylate, poly (ethylene glycol) ether acrylate benzyl, octadecyl polyoxyethylene ether methacrylate, but not limited thereto. Polymethyl acrylate is a high molecular polymer, and its molecular formula is (C4H6O2) n The rheology modifier in the present invention participates in the emulsion polymerization of the styrene acrylic emulsion. The viscosity of the styrene acrylic emulsion is effectively improved, and it has good compatibility in the emulsion of the acrylic system. Thus, the viscosity water resistance and high temperature stability of the styrene acrylic emulsion are improved, so that the mosaic adhesive containing the styrene acrylic emulsion can be immersed in high temperature water for a long time or used in a high humidity and high temperature environment for a long time without cracking or falling off.

[0067] In the actual implementation process, mosaics will be used in the decoration of hot spring hotel baths. Hot spring water contains a large amount of minerals such as calcium, magnesium, sodium, potassium, etc., has a high salt content, and the water temperature is generally relatively high, and the temperature of hot spring water is generally ≥38°C. Specifically, the average TDS value of natural hot springs is 800mg / L, while the average TDS value of tap water is 200mg / L. During long-term use, salt crystals are easily accumulated on the surface of the mosaic and its adhesive, causing erosion of the adhesive, resulting in cracking and falling off. In some embodiments of the present invention, the rheology modifier is a mixture of docosyl alcohol polyoxyethylene ether methacrylate and polymethyl acrylate with a degree of polymerization of 14. The above-mentioned rheology modifier can improve the resistance of the adhesive made of styrene acrylic emulsion to hot water and salt erosion.

[0068] More preferably, the weight ratio of the behenyl alcohol polyoxyethylene ether methacrylate to the polymethyl acrylate is (2-3): (3-6). Exemplary ratios are 1:3, 1:2, 2:3, 1:1, but not limited thereto. The viscosity of the above-mentioned rheology modifier is 0.6-1.0 mPa·s (using a rotational viscometer NDJ-8S3#60R 25°C).

[0069] The emulsifier of the present invention can be selected from common nonionic emulsifiers and / or anionic emulsifiers on the market, for example, sodium dodecyl sulfate (SDS), dodecyl trimethyl ammonium chloride, OP-10, Tween 80, but not limited thereto.

[0070] In the embodiments of the present invention, the inorganic peroxide initiator can be sodium persulfate and / or ammonium persulfate; the tert-butyl initiator is di-tert-butyl peroxide and / or tert-butyl hydroperoxide.

[0071] Preferably, the styrene-acrylic emulsion further comprises the following components in parts by weight:

[0072]

[0073] In an embodiment of the present invention, 0.01-1.5 parts by weight of a tert-butyl initiator is added to the emulsion after the polymerization reaction to denucleate the residual monomers in the emulsion. Since the amount of the tert-butyl initiator added is excessive in order to ensure that the residual monomers are completely denucleated, a reducing agent is also required to remove the remaining tert-butyl initiator. The reducing agent can be selected from sodium formaldehyde thiosulfate and / or sodium dithionite.

[0074] The pH regulator is aqueous ammonia and / or sodium hydroxide solution;

[0075] The defoamer is emulsified silicone oil, emulsified mineral oil or trimethyl phosphate;

[0076] The preservative is 2-methyl-4-isothiazoline-3-one and / or 2-methyl-5-chloro-4-isothiazoline-3-one.

[0077] It should be noted that the prepared styrene-acrylic emulsion has a solid content of 45-50%, a viscosity of 1000-1500 mPa·s (using a rotational viscometer NDJ-8S 3#60R at 25° C.), and a pH value of 8-9.

[0078] In some embodiments of the present invention, the adhesive used for bonding the mosaic mesh further includes auxiliary additives;

[0079] The auxiliary additives include the following components in parts by weight:

[0080] Multifunctional amine additive 0.05-0.15 parts by weight

[0081] Silane coupling agent 0.5-1 parts by weight

[0082] Thickener 1-4 parts by weight

[0083] Bactericide 0.05-0.15 weight part

[0084] 40-50 parts by weight of purified water;

[0085] The thickener is carbomer and / or polyacrylic acid;

[0086] The bactericide is formaldehyde releaser and / or MBS-56.

[0087] The multifunctional amine additive can be selected from common products on the market, such as Dow AMP-95, Tech-8095, Solvay AN130, but not limited to these.

[0088] The silane coupling agent may be selected from γ-aminopropyltriethoxysilane, vinyltriethoxysilane, 3-aminopropyltrimethoxysilane, but is not limited thereto.

[0089] In some embodiments of the present invention, the addition of auxiliary additives is to improve some properties of the adhesive. For example, the viscosity of the adhesive is adjusted by adding a thickener to meet the viscosity requirements of a specific product. The addition of a multifunctional amine additive is to adjust the pH value of the adhesive. The addition of a bactericidal agent is to increase the antibacterial properties of the adhesive so that it will not grow mold when used in a high humidity and high temperature environment for a long time. Silane coupling agents can form a hydrophobic layer on the surface of the adhesive to further enhance water resistance.

[0090] Further, the weight of the styrene-acrylic emulsion is 0.7-1.2 times the weight of the auxiliary additive, exemplarily 0.7, 0.75, 0.8, 0.9, 1.0, 1.1, but not limited thereto.

[0091] Accordingly, an embodiment of the present invention also provides a method for preparing an adhesive for bonding mosaic meshes, comprising the following steps:

[0092] S1, adding 20-30wt% of pure water, 10-50wt% of emulsifier and 0.5-1.5 parts by weight of rheology modifier into an emulsifying kettle, stirring and emulsifying;

[0093] Specifically, pure water, emulsifier and rheology modifier are added to the emulsification kettle simultaneously and stirred for 10-30 minutes. The emulsifier is a nonionic emulsifier and / or an anionic emulsifier, polymethyl acrylate and / or long-chain alkyl alcohol polyoxyethylene ether methacrylate.

[0094] S2, adding 15-35 parts by weight of styrene, 0.5-1.5 parts by weight of acrylic acid, and 15-30 parts by weight of acrylic acid ester simultaneously into an emulsifying kettle, stirring to obtain a premixed slurry;

[0095] Specifically, styrene, acrylic acid and acrylic ester are added into an emulsifying kettle simultaneously, and stirred for 15-40 minutes at a rotation speed of 1500-3000 rpm to obtain a premixed slurry. The acrylic ester is one or more of butyl acrylate, octyl acrylate and methyl methacrylate.

[0096] S3, adding the remaining purified water and the remaining emulsifier to the reactor, heating to 70-95°C, taking 1-15wt% of the premixed slurry and dropping it into the reactor, immediately adding 40-60wt% of the inorganic peroxide initiator in the formula after the addition is completed, stirring at 85-95°C for 15-40min, and then continuing to drop the remaining premixed slurry and the remaining inorganic peroxide initiator, and after the addition is completed, keeping warm at 80-90°C for 1-2h;

[0097] Wherein, the inorganic peroxide initiator is ammonium persulfate and / or sodium persulfate.

[0098] S4, after the insulation is completed, 0.01-0.1 parts by weight of tert-butyl initiator is added to the reactor and stirred;

[0099] Specifically, a tert-butyl initiator is added into a reaction kettle and stirred at 65-80° C. for 10-30 minutes; wherein the tert-butyl initiator is di-tert-butyl peroxide and / or tert-butyl hydroperoxide.

[0100] Preferably, see Figure 2 As shown, step S4 also includes the following steps:

[0101] S41, adding 0.01-0.1 parts by weight of a reducing agent into a reaction kettle and stirring;

[0102] Specifically, a reducing agent is added to a reaction kettle and stirred for 15-30 minutes; wherein the reducing agent is sodium dithionite and / or sodium dithionite.

[0103] S42, cooling the reaction kettle to 25-45° C., adding a pH adjuster, adjusting the pH value to 8-9.5, and then adding 0.1-0.5 parts by weight of a preservative and 0.1-0.5 parts by weight of a defoamer, stirring evenly, to obtain a styrene-acrylic emulsion;

[0104] Specifically, a pH regulator, a preservative and a defoaming agent are added into a reaction kettle and stirred evenly to obtain a styrene-acrylic emulsion;

[0105] Specifically, the styrene acrylic emulsion needs to be filtered through a 200-mesh filter after cooling.

[0106] Wherein, the pH regulator is ammonia water and / or sodium hydroxide, the preservative is 2-methyl-4-isothiazoline-3-one and / or 2-methyl-5-chloro-4-isothiazoline-3-one, and the defoaming agent is emulsified silicone oil or emulsified mineral oil.

[0107] S43, adding a multifunctional amine auxiliary agent to 40-50 parts by weight of pure water until the pH value reaches 9-10 to obtain a reaction solvent;

[0108] S44, adding 0.5-1 parts by weight of a silane coupling agent, 1-4 parts by weight of a thickener and 0.05-0.15 parts by weight of a bactericide to the reaction solvent, and stirring to obtain an auxiliary additive;

[0109] Wherein, the thickener is carbomer and / or polyacrylic acid, and the bactericide is formaldehyde releaser and / or MBS-56.

[0110] S45, mixing the filtered styrene-acrylic emulsion with the auxiliary additive and stirring evenly; wherein the weight of the styrene-acrylic emulsion is 0.7-1.2 times the weight of the auxiliary additive; specifically, the styrene-acrylic emulsion and the auxiliary additive are mixed, stirred, and filtered through a 100-mesh filter.

[0111] S5, cooling, filtering, discharging, and obtaining a bonding adhesive containing styrene acrylic emulsion.

[0112] Wherein, the formula amount of pure water in steps S1 to S3 is 40-60 parts by weight, and the formula amount of emulsifier is 0.5-2 parts by weight.

[0113] It should be noted that the viscosity of the final product of the adhesive with auxiliary additives added should be controlled at 29000-35000mPa·s (tested using a digital viscometer NDJ-8S). The viscosity of mosaic adhesive is high, and it is not easy to sag after being glued on the glass fiber mesh, which is beneficial to improve the construction performance of mosaic adhesive. However, if the viscosity is too high, the mosaic adhesive is not easy to adhere to the glass fiber mesh, so the viscosity needs to be controlled.

[0114] The present invention is further described below with reference to specific examples.

[0115] Example 1

[0116] Add 20 wt% of pure water, 25 wt% of OP-10 and 0.5 parts by weight of behenyl polyoxyethylene ether methacrylate into the emulsifying kettle simultaneously and stir for 15 minutes;

[0117] 15 parts by weight of styrene, 0.5 parts by weight of acrylic acid, and 15 parts by weight of octyl acrylate were simultaneously added into an emulsifying kettle, and stirred at a speed of 2000 rpm for 20 minutes to obtain a premixed slurry;

[0118] Add the remaining pure water and the remaining OP-10 into the reactor, heat to 90°C, take 5wt% of the premixed slurry and drop it into the reactor, immediately add 50wt% of the formula amount of ammonium persulfate after the addition is completed, stir at 90°C for 20min, continue to drop the remaining premixed slurry and the remaining ammonium persulfate, and keep warm at 87°C for 1h after the addition is completed;

[0119] After the heat preservation is completed, 0.01 parts by weight of di-tert-butyl peroxide is added to the reaction kettle and stirred at 70°C for 10 minutes;

[0120] The reaction kettle was cooled to 25° C., and the styrene-acrylic emulsion was obtained after filtering with a 200-mesh filter;

[0121] The amount of the emulsifier (OP-10) added was 0.5 parts by weight, the amount of ammonium persulfate added was 0.1 parts by weight, and the amount of the purified water added was 40 parts by weight.

[0122] The styrene acrylic emulsion obtained above is used as the adhesive for mosaic.

[0123] Example 2

[0124] 20 wt% of pure water, 25 wt% of sodium lauryl sulfate and 1 part by weight of octadecyl alcohol polyoxyethylene ether methacrylate were added into an emulsifying kettle simultaneously and stirred for 15 minutes;

[0125] 25 parts by weight of styrene, 1 part by weight of acrylic acid, and 23 parts by weight of butyl acrylate were simultaneously added into an emulsifying kettle, and stirred at a rotation speed of 2000 rpm for 20 minutes to obtain a premixed slurry;

[0126] Add the remaining purified water and the remaining sodium dodecyl sulfate into the reactor, heat to 90°C, take 5wt% of the premixed slurry and drop it into the reactor, immediately add 50wt% of the sodium persulfate in the formula after the addition is completed, stir at 90°C for 20min, continue to drop the remaining premixed slurry and the remaining sodium persulfate, and keep warm at 87°C for 1h after the addition is completed;

[0127] After the heat preservation is completed, 0.05 parts by weight of tert-butyl hydroperoxide is added to the reaction kettle and stirred at 70°C for 10 minutes;

[0128] The reaction kettle was cooled to 25° C., and the styrene-acrylic emulsion was obtained after filtering with a 200-mesh filter;

[0129] The amount of sodium lauryl sulfate added is 1.3 parts by weight, the amount of sodium persulfate added is 0.15 parts by weight, and the amount of pure water added is 50 parts by weight.

[0130] The styrene acrylic emulsion obtained above is used as the adhesive for mosaic.

[0131] Example 3

[0132] 20 wt% of pure water, 25 wt% of sodium lauryl sulfate and 1.5 parts by weight of polymethyl acrylate (degree of polymerization: 10) were added into an emulsifying kettle simultaneously and stirred for 15 min.

[0133] 35 parts by weight of styrene, 1.5 parts by weight of acrylic acid, and 30 parts by weight of methyl methacrylate were simultaneously added into an emulsifying kettle, and stirred at a rotation speed of 2000 rpm for 20 minutes to obtain a premixed slurry;

[0134] Add the remaining purified water and the remaining sodium dodecyl sulfate to the reactor, heat to 90°C, take 5wt% of the premixed slurry and drop it into the reactor, immediately add 50wt% of the sodium persulfate in the formula after the addition is completed, stir at 90°C for 20min, continue to drop the remaining premixed slurry and the remaining sodium persulfate, and keep warm at 87°C for 1h after the addition is completed;

[0135] After the heat preservation is completed, 0.1 parts by weight of tert-butyl hydroperoxide is added to the reaction kettle and stirred at 70°C for 10 minutes;

[0136] The reaction kettle was cooled to 25° C., and the styrene-acrylic emulsion was obtained after filtering with a 200-mesh filter;

[0137] The amount of sodium lauryl sulfate added is 2 parts by weight, the amount of ammonium persulfate added is 0.25 parts by weight, and the amount of pure water added is 60 parts by weight.

[0138] Example 4

[0139] 20 wt% of pure water, 25 wt% of OP-10 and 1 part by weight of rheology modifier (a mixture of behenyl alcohol polyoxyethylene ether methacrylate and polymethyl acrylate with a polymerization degree of 14, with a weight ratio of 1:3) were added into an emulsifying kettle simultaneously and stirred for 15 minutes;

[0140] 25 parts by weight of styrene, 1 part by weight of acrylic acid, and 23 parts by weight of butyl acrylate were simultaneously added to an emulsifying kettle, and stirred at a rotation speed of 2000 rpm for 20 minutes to obtain a premixed slurry;

[0141] Add the remaining pure water and the remaining OP-10 to the reactor, heat to 90°C, take 5wt% of the premixed slurry and drop it into the reactor, immediately add 50wt% of the formula amount of ammonium persulfate after the addition is completed, stir at 90°C for 20min, continue to drop the remaining premixed slurry and the remaining ammonium persulfate, and keep warm at 87°C for 1h after the addition is completed;

[0142] After the heat preservation is completed, 0.1 parts by weight of tert-butyl hydroperoxide is added to the reaction kettle and stirred at 70°C for 10 minutes;

[0143] The reaction kettle was cooled to 25° C., and the styrene-acrylic emulsion was obtained after filtering with a 200-mesh filter;

[0144] The amount of OP-10 added is 1.3 parts by weight, the amount of ammonium persulfate added is 0.15 parts by weight, and the amount of pure water added is 50 parts by weight.

[0145] The styrene acrylic emulsion obtained above is used as the adhesive for mosaic.

[0146] Example 5

[0147] The difference between Example 5 and Example 4 is that in the rheology modifier, the weight ratio of behenyl alcohol polyoxyethylene ether methacrylate to the polymerization degree of 14 is 1:2.

[0148] Example 6

[0149] The difference between Example 6 and Example 4 is that in the rheology modifier, the weight ratio of behenyl alcohol polyoxyethylene ether methacrylate to the polymerization degree of 14 is 1:1.

[0150] Example 7

[0151] 20wt% of pure water, 25wt% of OP-10 and 1 part by weight of rheology modifier (polyoxyethylene behenyl alcohol methacrylate and polymerization degree 14, the weight ratio of the two is 1:2) were added into the emulsification kettle simultaneously and stirred for 15 minutes;

[0152] 25 parts by weight of styrene, 1 part by weight of acrylic acid, and 23 parts by weight of butyl acrylate were simultaneously added into an emulsifying kettle, and stirred at a rotation speed of 2000 rpm for 20 minutes to obtain a premixed slurry;

[0153] Add the remaining pure water and the remaining OP-10 to the reactor, heat to 90°C, take 5wt% of the premixed slurry and drop it into the reactor, immediately add 50wt% of the formula amount of ammonium persulfate after the addition is completed, stir at 90°C for 20min, continue to drop the remaining premixed slurry and the remaining ammonium persulfate, and keep warm at 87°C for 1h after the addition is completed;

[0154] After the heat preservation is completed, 0.05 parts by weight of tert-butyl hydroperoxide is added to the reaction kettle, and after stirring at 70°C for 10 minutes, 0.05 parts by weight of bleaching powder is added and stirred for 15 minutes;

[0155] The reaction kettle was cooled to 25° C., ammonia water was added, and the pH value of the slurry was adjusted to 9, and then 0.25 parts by weight of 2-methyl-5-chloro-4-isothiazoline-3-one and 0.25 parts by weight of emulsified silicone oil were added, and the mixture was stirred and cooled to 25° C., and filtered through a 200-mesh filter to obtain the styrene-acrylic emulsion;

[0156] Adding a multifunctional amine auxiliary agent into 50 parts by weight of pure water until the pH value reaches 9 to obtain a reaction solvent;

[0157] 0.75 parts by weight of a silane coupling agent, 2.5 parts by weight of carbomer and 0.08 parts by weight of a formaldehyde releaser are added to the reaction solvent, and stirred to obtain an auxiliary additive;

[0158] The filtered styrene-acrylic emulsion is mixed with the auxiliary additive (the weight of the styrene-acrylic emulsion is 0.7 times the weight of the auxiliary additive), and stirred evenly, and filtered through a 100-mesh filter to obtain a finished adhesive.

[0159] Example 8

[0160] Compared with Example 7, Example 8 is different in that the degree of polymerization of polymethyl acrylate is 18, and the weight of the styrene acrylic emulsion is 1 times the weight of the auxiliary additive.

[0161] Example 9

[0162] The difference between Example 9 and Example 7 is that the weight of the styrene acrylic emulsion is 1.1 times the weight of the auxiliary additive.

[0163] Example 10

[0164] The difference between Example 10 and Example 7 is that the weight of the styrene acrylic emulsion is 1.2 times the weight of the auxiliary additive.

[0165] Comparative Example 1

[0166] The difference between Comparative Example 1 and Example 7 is that Comparative Example 1 does not contain styrene acrylic emulsion, and only uses auxiliary additives as the finished adhesive.

[0167] Comparative Example 2

[0168] The difference between Comparative Example 2 and Example 7 is that the styrene-acrylic emulsion does not contain a rheology-modifying monomer.

[0169] Tests of Examples 1-10 and Comparative Examples 1-2:

[0170] (1) The same ceramic mosaic with a water absorption rate of 0.4% and the same glass fiber mesh with a mesh number of 8 were used to prepare samples at the same time. After applying 5g (Examples 1-9, Comparative Example 1, Comparative Example 2) adhesive equally on the glass fiber mesh, the glued glass fiber mesh was laid flat on the back of the ceramic mosaic and cured in a constant temperature and humidity room at 25°C and 50% humidity for 24 hours. After the sample preparation was completed, it was immersed in 80°C hot spring water (TDS value of hot spring water is 750mg / L) for 5 days, and then a 180° peeling force test was performed using a tensile test machine.

[0171] The test results are as follows:

[0172]

[0173]

[0174] (2) The same ceramic mosaic with a water absorption rate of 0.4% and the same glass fiber mesh with a mesh size of 8 were used to prepare samples at the same time. After applying 5g (Examples 1-9, Comparative Example 1, Comparative Example 2) adhesive equally on the glass fiber mesh, the glued glass fiber mesh was laid flat on the back of the ceramic mosaic and cured in a constant temperature and humidity room at 25°C and 50% humidity for 24 hours. After the sample preparation was completed, it was immersed in tap water at 25°C (TDS value of tap water was 210 mg / L) for 5 days, and then a 180° peeling force test was performed using a tensile tester.

[0175] The test results are as follows:

[0176] project After soaking in normal temperature tap water, 180° peeling force / N Example 1 20.07 Example 2 20.10 Example 3 20.04 Example 4 23.42 Example 5 23.61 Example 6 23.55 Example 7 23.91 Example 8 24.11 Example 9 24.34 Example 10 24.86 Comparative Example 1 Direct fall off Comparative Example 2 11.96

[0177] Therefore, the present invention can meet the use requirements of normal temperature water and high temperature hot water, and can be used for a long time without falling off in a high temperature and high humidity environment. In addition, it can also meet the long-term use requirements of hot spring water containing a large amount of minerals and a high salt content, and has good water resistance and high temperature resistance.

[0178] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An adhesive for bonding mosaic mesh, characterized in that: The adhesive comprises a styrene acrylic emulsion, wherein the styrene acrylic emulsion comprises the following components in parts by weight: The rheology modifier is polymethyl acrylate and / or long-chain alkyl alcohol polyoxyethylene ether methacrylate; The emulsifier is a nonionic emulsifier and / or an anionic emulsifier; The initiator is an inorganic peroxide initiator and / or a tert-butyl initiator.

2. The adhesive according to claim 1, characterized in that: The long-chain alkyl alcohol polyoxyethylene ether methacrylate is behenyl polyoxyethylene ether methacrylate or octadecyl polyoxyethylene ether methacrylate; The polymerization degree of the polymethyl acrylate is 10-18.

3. The adhesive according to claim 2, characterized in that: The rheology modifier is a mixture of behenyl alcohol polyoxyethylene ether methacrylate and polymethyl acrylate, and the degree of polymerization of the polymethyl acrylate is 14; The weight ratio of the behenyl alcohol polyoxyethylene ether methacrylate to the polymethyl acrylate is (2-3): (3-6); The viscosity of the rheology modifier is 0.7-1.2 mPa·s at 25°C.

4. The adhesive according to claim 1, characterized in that: The acrylate is one or more of butyl acrylate, octyl acrylate, and methyl methacrylate; The inorganic peroxide initiator is sodium persulfate and / or ammonium persulfate; the tert-butyl initiator is di-tert-butyl peroxide and / or tert-butyl hydroperoxide.

5. The adhesive according to claim 1, characterized in that: The styrene-acrylic emulsion also includes the following components in parts by weight: The reducing agent is sodium dithionite or sodium dithionite; The pH regulator is ammonia water and / or sodium hydroxide; The defoamer is emulsified silicone oil or emulsified mineral oil; The preservative is 2-methyl-4-isothiazoline-3-one or 2-methyl-5-chloro-4-isothiazoline-3-one.

6. The adhesive according to claim 5, characterized in that: The adhesive comprises an auxiliary additive and the styrene-acrylic emulsion, and the weight of the styrene-acrylic emulsion is 0.7-1.2 times the weight of the auxiliary additive; The auxiliary additives include the following components in parts by weight: The thickener is carbomer and / or polyacrylic acid; The bactericide is triadimefon and / or MBS-56.

7. The adhesive according to claim 6, characterized in that: The styrene-acrylic emulsion has a solid content of 45-50% and a viscosity of 1000-1500 mPa·s at 25°C; The adhesive to which the auxiliary additive is added has a viscosity of 29000-35000 mPa·s at 25°C.

8. A method for preparing the adhesive according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, adding 20-30wt% of pure water, 10-50wt% of emulsifier and 0.5-1.5 parts by weight of rheology modifier into an emulsifying kettle simultaneously, stirring and emulsifying; S2, adding 15-35 parts by weight of styrene, 0.5-1.5 parts by weight of acrylic acid, and 15-30 parts by weight of acrylic acid ester simultaneously into an emulsifying kettle, stirring to obtain a premixed slurry; S3, adding the remaining purified water and the remaining emulsifier to the reactor, heating to 70-95°C, taking 1-15wt% of the premixed slurry and dropping it into the reactor, immediately adding 40-60wt% of the inorganic peroxide initiator in the formula after the addition is completed, stirring at 85-95°C for 15-40min, and then continuing to drop the remaining premixed slurry and the remaining inorganic peroxide initiator, and after the addition is completed, keeping warm at 80-90°C for 1-2h; S4, after the insulation is completed, 0.01-0.1 parts by weight of tert-butyl initiator is added to the reactor and stirred; S5, cooling, filtering, discharging, and obtaining a bonding adhesive containing styrene acrylic emulsion; Wherein, the formula amount of the pure water is 40-60 parts by weight, and the formula amount of the emulsifier is 0.5-2 parts by weight.

9. The method for preparing the adhesive according to claim 8, characterized in that: Step S4 also includes the following steps: S41, adding 0.01-0.1 parts by weight of a reducing agent into a reaction kettle and stirring; S42, cooling the reaction kettle to 25-45° C., adding a pH adjuster, adjusting the pH value to 8-9.5, and then adding 0.1-0.5 parts by weight of a preservative and 0.1-0.5 parts by weight of a defoamer, stirring evenly, to obtain a styrene-acrylic emulsion; The reducing agent is sodium dithionite and / or sodium dithionite; The pH regulator is ammonia water and / or sodium hydroxide; The defoamer is emulsified silicone oil or emulsified mineral oil; The preservative is 2-methyl-4-isothiazoline-3-one and / or 2-methyl-5-chloro-4-isothiazoline-3-one.

10. The method for preparing the adhesive according to claim 9, characterized in that: Step S4 also includes the following steps: S43, adding a multifunctional amine auxiliary agent to 40-50 parts by weight of pure water until the pH value reaches 9-10 to obtain a reaction solvent; S44, adding 0.5-1 parts by weight of a silane coupling agent, 1-4 parts by weight of a thickener and 0.05-0.15 parts by weight of a bactericide to the reaction solvent, and stirring to obtain an auxiliary additive; S45, mixing the filtered styrene-acrylic emulsion with the auxiliary additive and stirring evenly; wherein the weight of the styrene-acrylic emulsion is 0.7-1.2 times the weight of the auxiliary additive; The thickener is carbomer and / or polyacrylic acid; The bactericide is formaldehyde releaser and / or MBS-56.

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