Accelerator for low-odor rapid-curing seam beautifying agent, seam beautifying agent and preparation method of seam beautifying agent

Abstract

The invention relates to the technical field of sealant, and provides an accelerant for a low-odor rapid-curing sealant, the sealant and a preparation method of the sealant, and the accelerant is obtained by mixing bifunctional acrylate I and alicyclic amine and reacting at the temperature of 60-80 DEG C. The sealant is obtained by mixing and curing a component A and a component B, the component A comprises an acrylate matrix and the accelerator, and the component B comprises a thiol compound. Specific acrylic ester containing a tertiary amine structure is synthesized to serve as an accelerant, the accelerant is placed in the acrylic ester component, the situation that the tertiary amine accelerant and a thiol compound are stored in a unified system and emit pungent smell is avoided, meanwhile, the curing speed of the acrylic ester, the thiol compound and the accelerant can be guaranteed, and the curing speed of the acrylic ester, the thiol compound and the accelerant is improved. The quick curing is realized, and the storage stability and other application performances of the acrylate are also considered.

Description

Technical Field

[0001] The invention relates to the technical field of seam beautifying agents, and in particular to an accelerator for a low-odor, fast-curing seam beautifying agent, the seam beautifying agent and a preparation method thereof. Background Art

[0002] Sealing agent is a new type of environmentally friendly seaming material, which needs to have excellent weather resistance, yellowing resistance and aging resistance. It also needs to have super strong adhesion, so that it can fit the tiles tightly and effectively prevent stains from penetrating and mold from growing in the gaps.

[0003] At present, the main types of caulking agent products on the market are epoxy system and polyurea system. The characteristics of these two systems are prominent and the differences are obvious. Specifically: the caulking agent products of epoxy system have moderate curing speed and long operation time; the product system is mature and stable; the construction operation is relatively simple; the price is also relatively low; but its curing agent component is mainly amine curing agent, which has a certain odor. Due to the slow curing speed, it will cause the volatilization of small molecular amines during the curing process, which will have a certain impact on the health of users; at the same time, the yellowing resistance of the system is average. Relatively speaking, the caulking agent products of polyurea system have a very fast curing speed; they can also be constructed normally in low temperature environment; after the system is formed, it is less affected by the changes in high and low temperature environment temperature. However, the too fast curing speed makes the operation time short, resulting in increased difficulty in use; the price is high; and the polyurea system contains free isocyanate, which will have a certain impact on the health of the constructors during the construction process.

[0004] In comparison of the above two mainstream products, the epoxy system is more mature and stable, but the curing speed is slow and the environmental protection property is average; the polyurea system has a fast curing speed, but it is more difficult to operate and has low environmental protection property. At present, there are few seam beautifiers on the market that can take into account good yellowing resistance, easy operation, environmental protection and fast curing speed. Summary of the invention

[0005] The present invention provides an accelerator for a low-odor fast-curing seam-beautifying agent, a seam-beautifying agent and a preparation method thereof, so as to solve the above-mentioned defects existing in the prior art.

[0006] Specifically, in a first aspect, the present invention provides an accelerator for a seam-beautifying agent, wherein the seam-beautifying agent adopts a thiol-acrylate curing system, and the accelerator comprises one or more of the compounds shown in structural formula I: The structural formula I is ; In the structural formula I, R1 is selected from , , , or ; R2 is each independently selected from , , , , or .

[0007] The thiol-acrylate curing system of the present invention is a system that achieves curing through the reaction between a thiol compound and an acrylate.

[0008] Generally, in the thiol-acrylate curing system, in order to achieve rapid curing, the tertiary amine accelerator is often stored in the component where the thiol compound is located, but this treatment method will cause the group to disperse and emit a pungent odor, which is not conducive to the health of the constructor for the caulking agent product to be prepared by the present invention. If it is directly present in the component where the acrylate is located, the effect of the obtained caulking agent is very poor and difficult to use. Based on this, the present invention proposes the above-mentioned accelerator, which is an improved acrylate containing a tertiary amine structure. Because the accelerator contains an acrylate group with a specific structure, it can be stored in the acrylate component, which avoids the problem of emitting a pungent odor when it is in the same component as the thiol compound, and is friendly to people and the environment during use. In addition, because the above-mentioned accelerator contains an acrylate group with a specific structure, it also makes the caulking agent of the present invention have excellent storage stability while greatly reducing the amount of phenolic inhibitors and other components. In the present invention, the structural design of the above-mentioned accelerator fully considers factors such as its stability in the component where the acrylate is located, its influence on the curing rate of the thiol-acrylate curing system, its compatibility in the component where the acrylate is located, and various application properties of the seam beautifying agent. It is found that by optimizing the acrylate containing a tertiary amine structure to obtain a substance containing the structural formula I, the above-mentioned problems can be comprehensively solved.

[0009] Experiments show that when monofunctional acrylate or multifunctional acrylate is used to replace the bifunctional acrylate synthesis accelerator, there are problems of poor acid resistance and / or poor UV stability.

[0010] Preferably, R1 is selected from: and / or , R2 are each independently selected from and / or .

[0011] In a second aspect, the present invention also provides a method for preparing the accelerator as described above, comprising: mixing a difunctional acrylate I and an alicyclic amine, and reacting them at 60-80° C. to obtain the accelerator.

[0012] Preferably, the difunctional acrylate I and the alicyclic amine are mixed and reacted at 60-80° C. for 2-3 hours to obtain the accelerator.

[0013] Further preferably, the bifunctional acrylate I is added into a reactor with a condensation reflux device, stirred evenly, and heated to 50° C., and the alicyclic amine is slowly added dropwise to the reaction container, and the temperature is continuously raised to 70-80° C. while the alicyclic amine is added dropwise, and kept warm for 2-3 hours to obtain the promoter.

[0014] In the present invention, the difunctional acrylate I and the alicyclic amine can undergo a Michael addition reaction under the above conditions, which is a nucleophilic addition reaction, wherein the nitrogen atom of the alicyclic amine acts as a nucleophilic reagent to attack the double bond of the difunctional acrylate I, forming a new carbon-nitrogen bond and generating an acrylate product containing a tertiary amine structure.

[0015] According to the preparation method of the accelerator provided by the present invention, the molar ratio of the difunctional acrylate I to the alicyclic amine is 4-5:1.

[0016] In the present invention, controlling the usage of the bifunctional acrylate I and the alicyclic amine within the above range helps to improve the reaction efficiency of the accelerator and ensure the effect of the accelerator.

[0017] According to the preparation method of the accelerator provided by the present invention, the difunctional acrylate I is selected from 1,6-hexanediol diacrylate, 1,4-butanediol diacrylate, neopentyl glycol diacrylate, diethylene glycol diacrylate, ethylene glycol dimethacrylate or dimethacrylate; And / or, the alicyclic amine is selected from 4,4'-diaminodicyclohexylmethane, isophoronediamine, 1,3-cyclohexanedimethylamine, 3,3'-dimethyl-4,4-diaminodicyclohexylmethane or 1-methyl-2,4-cyclohexanediamine.

[0018] When the difunctional acrylate I is selected from 1,6-hexanediol diacrylate, R2 in the structural formula I is selected from .

[0019] When the difunctional acrylate I is selected from 1,4-butanediol diacrylate, R2 in the structural formula I is selected from .

[0020] When the difunctional acrylate I is selected from neopentyl glycol diacrylate, R2 in the structural formula I is selected from .

[0021] When the difunctional acrylate I is selected from diethylene glycol diacrylate, R2 in the structural formula I is selected from .

[0022] When the difunctional acrylate I is selected from ethylene glycol dimethacrylate, R2 in the structural formula I is selected from .

[0023] When the difunctional acrylate I is selected from dimethacrylate, R2 in the structural formula I is selected from .

[0024] When the alicyclic amine is selected from 4,4'-diaminodicyclohexylmethane, R1 in the structural formula I is selected from .

[0025] When the alicyclic amine is selected from isophorone diamine, R1 in the structural formula I is selected from .

[0026] When the alicyclic amine is selected from 1,3-cyclohexanedimethylamine, R1 in the structural formula I is selected from .

[0027] When the alicyclic amine is selected from 3,3'-dimethyl-4,4-diaminodicyclohexylmethane, R1 in the structural formula I is selected from .

[0028] When the alicyclic amine is selected from 1-methyl-2,4-cyclohexanediamine, R1 in the structural formula I is selected from .

[0029] In a third aspect, the present invention further provides a seam beautifying agent, which is obtained by mixing component A and component B and then curing them, wherein component A comprises an acrylate matrix and the accelerator as described above, and component B comprises a thiol compound.

[0030] According to the seam beautifying agent provided by the present invention, component A comprises, by weight: 85-100 parts of bifunctional acrylate II, 1-4 parts of fluorine-containing acrylate, 2-4 parts of the accelerator, 0.5-2 parts of inhibitor and 10-15 parts of thixotropic agent I; And / or, in parts by weight, the component B comprises: 90 to 100 parts of a thiol compound, 3 to 10 parts of a diluent and 10 to 15 parts of a thixotropic agent II; In order to distinguish the difunctional acrylate of the synthetic accelerator from the difunctional acrylate as the acrylate matrix in component A, the former is defined as difunctional acrylate I and the latter is defined as difunctional acrylate II in the present invention. Unless otherwise specified, difunctional acrylate I and difunctional acrylate II should be independently understood as difunctional acrylates.

[0031] In order to distinguish the thixotropic agent in component A from the thixotropic agent in component B, the former is defined as thixotropic agent I and the latter is defined as thixotropic agent II in the present invention. In the absence of specific reference, thixotropic agent I and thixotropic agent II should be independently understood as thixotropic agents.

[0032] In the component A of the above-mentioned caulking agent, fluorinated acrylate is also added. This type of substance has good compatibility with bifunctional acrylate II and is easy to be evenly dispersed in the system. In addition, the substance contains many fluorinated groups, which can greatly improve the water resistance of the system and the stain resistance of the caulking agent. Because the caulking agent is mostly used in kitchens, bathrooms, living rooms, etc. in home decoration scenes, the most common pollution, such as vinegar, soy sauce, tea stains, beverages, etc., is mainly caused by water. Improving the hydrophobicity of the caulking agent can make stains easier to clean and prevent deeper pollution sources from penetrating into the system, ensuring the beauty of the caulking agent and increasing the service life of the caulking agent.

[0033] According to the seam beautifying agent provided by the present invention, the bifunctional acrylate II is selected from one or a combination of two or more of 1,6-hexanediol diacrylate, 1,4-butanediol diacrylate, neopentyl glycol diacrylate, polyethylene glycol diacrylate, diethylene glycol diacrylate, ethylene glycol dimethacrylate and triethylene glycol dimethacrylate; And / or, the fluorine-containing acrylate is selected from one or a combination of two or more of perfluorobutyl acrylate, 2-(perfluorohexyl)ethyl methacrylate, 2-(perfluorohexyl)ethyl acrylate, 2-(perfluorobutyl)ethyl acrylate, 2-(perfluorohexyl)ethyl methacrylate, 2-(perfluorohexyl)acrylate, 2-(perfluorohexyl)ethyl acrylate, and 2-(perfluorooctyl)ethyl methacrylate; And / or, the polymerization inhibitor is dodecylphenol and / or 2,6-di-tert-butyl-p-cresol; And / or, the thiol compound is one or a combination of two or more of trimethylolpropane tris(3-mercaptoacetate), trimethylolpropane tris(3-mercaptopropionate), trimethylolpropane tris(3-mercaptobutyrate), pentaerythritol tetrakis(mercaptoacetate), pentaerythritol tetrakis(3-mercaptopropionate) and pentaerythritol tetrakis(3-mercaptobutyrate); And / or, the diluent is benzyl alcohol; And / or, the thixotropic agent I is fumed silica; And / or, the thixotropic agent II is fumed silica.

[0034] According to the seam beautifying agent provided by the present invention, the component A comprises, by weight: 45-50 parts of 1,6-hexanediol diacrylate, 40-45 parts of ethylene glycol dimethacrylate, 2-3 parts of 2-(perfluorohexyl)ethyl methacrylate, 2-3 parts of the accelerator, 1-2 parts of dodecylphenol and 12-15 parts of fumed silica; And / or, in parts by weight, the component B comprises: 90 to 100 parts of pentaerythritol tetrakis(thioglycolate), 4 to 6 parts of benzyl alcohol and 12 to 15 parts of fumed silica.

[0035] Research has found that the above-mentioned specific composition of the caulking agent can achieve better performance in all aspects.

[0036] According to the seam beautifying agent provided by the present invention, the mass ratio of the component A to the component B is 1-1.2:1.

[0037] In a fourth aspect, the present invention further provides a method for preparing the above-mentioned seam beautifying agent, comprising mixing component A and component B at 5-25° C. and curing.

[0038] The preparation process of the component A is as follows: the raw materials are mixed evenly according to the formula, and stirred at room temperature for 20 to 30 minutes with a high-speed stirrer until they are mixed evenly, so as to obtain the component A of the seam beautifying agent.

[0039] The preparation process of the B component is as follows: the raw materials are mixed evenly according to the formula, and stirred at room temperature for 20 to 30 minutes with a high-speed mixer until they are mixed evenly, so as to obtain the B component of the seam beautifying agent.

[0040] The curing temperature of the seam beautifying agent of the present invention is room temperature, and the surface drying time is within the range of 0.1 to 0.4 hours, which meets the technical requirements of seam beautifying agents in the art.

[0041] The low-odor fast-curing accelerator for a seam-beautifying agent, the seam-beautifying agent and the preparation method thereof provided by the present invention synthesize a specific acrylate containing a tertiary amine structure as an accelerator, and place the accelerator in an acrylate component, thereby preventing the tertiary amine accelerator and the thiol compound from being stored in a unified system and emitting a pungent odor. At the same time, the curing speed of the acrylate+thiol compound+accelerator can be guaranteed to achieve fast curing, while taking into account various application properties such as the storage stability of the acrylate.

[0042] In addition, the components involved in curing of the present invention do not contain benzene ring structures that are prone to yellowing, thereby ensuring the color stability of the system. In addition, some fluorinated acrylates are added to the system to improve its hydrophobicity, thereby making the system have good stain resistance.

[0043] In summary, the present invention provides a seam beautifying agent with low odor, fast curing speed, good yellowing resistance, good stain resistance, and good bonding strength, which can be widely promoted and applied. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the field or the product instructions are used. If no manufacturer is specified for the reagents or instruments used, they are all conventional products that can be purchased through regular channels.

[0046] In order to obtain a accelerator with excellent performance, the present invention has conducted a large number of experiments, some of which are as follows: According to the formula in Tables 1 to 4, the corresponding acrylate was added into a reactor equipped with a condensation reflux device, stirred evenly, and heated to 50°C. The alicyclic amine was slowly added dropwise to the reaction vessel. While the alicyclic amine was added dropwise, the temperature was continued to be raised to 70-80°C, and kept warm for 2-3 hours to obtain an accelerator.

[0047] Table 1

[0048] Table 2

[0049] Table 3

[0050] Table 4

[0051] Acrylate, polythiol and the accelerators obtained from the above Nos. 1 to 15 were mixed at a fixed mass ratio of 100:100:3, and their curing time, VOC content, acid and alkali resistance and UV resistance stability were tested. The test results are shown in Table 5 below.

[0052] Table 5

[0053] After testing, all of the above accelerators can achieve a faster curing speed, have good alkali resistance, and the VOC content is at a low level. The accelerators synthesized with only difunctional acrylates, experimental numbers 3, 4, 7, 8, 10 and 12, the acid resistance and UV resistance stability of these numbered experimental groups are all good, and when monofunctional or polyfunctional acrylates are involved in the accelerator synthesis reaction, the acid resistance and UV resistance stability of these numbered experimental groups are significantly reduced. This experiment can illustrate that the difunctional acrylate selected by the present invention, the accelerator prepared can be better applied to the seam beautifying agent product, in addition to low odor, low volatility and fast curing speed, it has better effects on its acid and alkali resistance and UV resistance stability.

[0054] Furthermore, the accelerator for the low-odor fast-curing seam-beautifying agent, the seam-beautifying agent and the preparation method thereof of the present invention are described in more detail by the following examples.

[0055] Examples 1 to 5 Accelerator The present embodiments 1 to 5 provide a method for preparing an accelerator, wherein the process is as follows: a difunctional acrylate I is added into a reactor equipped with a condensation reflux device, stirred evenly, and heated to 50° C., and alicyclic amine is slowly added dropwise to the reaction vessel, and the temperature is continuously raised to 70 to 80° C. while the alicyclic amine is added dropwise, and the temperature is kept at 70 to 80° C. for 2 to 3 hours to obtain an accelerator.

[0056] The specific type and content of the difunctional acrylate I added in Examples 1 to 5 are shown in Table 1, and the specific type and content of the alicyclic amine added in Examples 1 to 5 are shown in Table 6.

[0057] Table 6

[0058] Example 6 Seam Beautifying Agent This embodiment provides a seam beautifying agent, which is obtained by mixing component A and component B at a mass ratio of 1:1 at room temperature and curing.

[0059] Wherein, component A is prepared by mixing 50 parts of 1,6-hexanediol diacrylate, 40 parts of ethylene glycol dimethacrylate, 2 parts of perfluorobutyl acrylate, 3 parts of accelerator (prepared by the method of Example 1), 1 part of dodecylphenol and 12 parts of fumed silica for 30 minutes and stirring until uniformly mixed.

[0060] In terms of weight, component B is prepared by mixing 90 parts of pentaerythritol tetrakis(thioglycolate), 5 parts of benzyl alcohol and 13 parts of fumed silica for 30 minutes and mixing them uniformly.

[0061] Example 7 Seam Beautifying Agent This embodiment provides a seam beautifying agent, which is obtained by mixing component A and component B at a mass ratio of 1:1 at room temperature and curing.

[0062] Among them, the preparation of component A is by mixing 40 parts of neopentyl glycol diacrylate, 30 parts of 1,4-butanediol diacrylate, 20 parts of diethylene glycol diacrylate, 1 part of 2-(perfluorohexyl)ethyl methacrylate, 1 part of 2-(perfluorohexyl)ethyl acrylate, 3 parts of accelerator (prepared by the method of Example 2), 2 parts of 2,6-di-tert-butyl-p-cresol and 13 parts of fumed silica for 30 minutes and stirring to obtain a uniform mixture.

[0063] In terms of weight, component B is prepared by mixing 60 parts of pentaerythritol tetrakis(thioglycolate), 35 parts of trimethylolpropane tris(3-thioglycolate), 5 parts of benzyl alcohol and 10 parts of fumed silica, stirring and mixing for 30 minutes until the mixture is uniformly mixed.

[0064] Example 8 Seam Beautifying Agent This embodiment provides a seam beautifying agent, which is obtained by mixing component A and component B at a mass ratio of 1:1 at room temperature and curing.

[0065] Among them, the preparation of component A is by mixing 50 parts of 1,6-hexanediol diacrylate, 20 parts of ethylene glycol dimethacrylate, 15 parts of polyethylene glycol diacrylate, 2 parts of 2-(perfluorohexyl)ethyl acrylate, 1 part of 2-(perfluorobutyl)ethyl acrylate, 1 part of 2-(perfluorobutyl)ethyl methacrylate, 4 parts of accelerator (prepared by the method of Example 3), 1 part of 2,6-di-tert-butyl-p-cresol, 1 part of dodecylphenol and 10 parts of fumed silica for 30 minutes and stirring to obtain a uniform mixture.

[0066] In terms of weight, component B is prepared by mixing 50 parts of pentaerythritol tetrakis(thioglycolate), 20 parts of trimethylolpropane tris(3-mercaptopropionate), 15 parts of trimethylolpropane tris(3-mercaptobutyrate), 8 parts of benzyl alcohol and 12 parts of fumed silica, stirring and mixing for 30 minutes to obtain a uniform mixture.

[0067] Example 9 Seam Beautifying Agent This embodiment provides a seam beautifying agent, which is obtained by mixing component A and component B at a mass ratio of 1:1 at room temperature and curing.

[0068] Among them, the preparation of component A is by mixing 50 parts of 1,6-hexanediol diacrylate, 30 parts of triethylene glycol dimethacrylate, 20 parts of ethylene glycol dimethacrylate, 2 parts of 2-(perfluorohexyl)acrylate, 1 part of 2-(perfluorohexyl)ethyl acrylate, 2 parts of accelerator (prepared by the method of Example 4), 0.5 parts of 2,6-di-tert-butyl-p-cresol and 13.5 parts of fumed silica for 30 minutes and stirring to obtain a uniform mixture.

[0069] In terms of weight, component B is prepared by mixing 80 parts of pentaerythritol tetrakis(thioglycolic acid), 10 parts of pentaerythritol tetrakis(3-mercaptopropionic acid), 10 parts of pentaerythritol tetrakis(3-mercaptobutyric acid), 6 parts of benzyl alcohol and 13 parts of fumed silica, stirring and mixing for 30 minutes to obtain a uniform mixture.

[0070] Example 10 Seam Beautifying Agent This embodiment provides a seam beautifying agent, which is obtained by mixing component A and component B at a mass ratio of 1:1 at room temperature and curing.

[0071] Among them, the preparation of component A is to stir and mix 90 parts of 1,4-butanediol diacrylate, 4 parts of 2-(perfluorooctyl)ethyl methacrylate, 3 parts of accelerator (prepared by the method of Example 5), 1 part of 2,6-di-tert-butyl-p-cresol and 13 parts of fumed silica for 30 minutes to obtain a uniform mixture.

[0072] In terms of weight, component B is prepared by mixing 94 parts of pentaerythritol tetrakis(3-mercaptobutyrate), 4 parts of benzyl alcohol and 10 parts of fumed silica for 30 minutes and mixing them uniformly.

[0073] Comparative Example 1 This comparative example provides a seam beautifying agent, which is obtained by mixing component A and component B at a mass ratio of 1:1 at room temperature and curing.

[0074] Among them, the preparation of component A is to stir and mix 40 parts of 1,6-hexanediol diacrylate, 50 parts of 1,4-butanediol diacrylate, 2 parts of perfluorobutyl acrylate, 2 parts of 2,4,6-tris(dimethylaminomethyl)phenol (DMP-30), 1 part of dodecylphenol and 10 parts of fumed silica for 30 minutes to obtain a uniform mixture.

[0075] In parts by weight, component B: the same as component B in Example 6.

[0076] Comparative Example 2 This comparative example provides a seam beautifying agent, which is obtained by mixing component A and component B at a mass ratio of 1:1 at room temperature and curing.

[0077] Among them, the preparation of component A, calculated by weight, is as follows: 50 parts of polyethylene glycol diacrylate, 40 parts of 1,6-hexanediol diacrylate, 2 parts of 2-(perfluorohexyl)ethyl acrylate, 3 parts of accelerator N,N-dimethylbenzylamine, 1 part of dodecylphenol and 10 parts of fumed silica are stirred and mixed for 30 minutes to obtain a uniform mixture.

[0078] In terms of weight, component B is prepared by mixing 50 parts of pentaerythritol tetrakis(thioglycolate), 25 parts of trimethylolpropane tris(3-mercaptopropionate), 15 parts of trimethylolpropane tris(3-mercaptobutyrate), 6 parts of benzyl alcohol and 10 parts of fumed silica, stirring and mixing for 30 minutes to obtain a uniform mixture.

[0079] Comparative Example 3 This comparative example provides a seam beautifying agent, which is obtained by mixing component A and component B at a mass ratio of 1:1 at room temperature and curing.

[0080] Among them, the preparation of component A is to stir and mix 50 parts of 1,6-hexanediol diacrylate, 40 parts of triethylene glycol dimethacrylate, 2 parts of 2-(perfluorohexyl)acrylate, 1 part of 2-(perfluorohexyl)ethyl acrylate, 2 parts of accelerator triethanolamine, 0.5 parts of 2,6-di-tert-butyl-p-cresol and 13.5 parts of fumed silica for 30 minutes to obtain a uniform mixture.

[0081] In terms of weight, component B is prepared by mixing 80 parts of pentaerythritol tetrakis(thioglycolic acid), 10 parts of pentaerythritol tetrakis(3-mercaptopropionic acid), 6 parts of benzyl alcohol and 13 parts of fumed silica, stirring and mixing for 30 minutes until the mixture is uniformly mixed.

[0082] The prepared seam beautifying agent was tested, wherein the odor level was tested according to HGT 4065-2008 / adhesive odor evaluation method, the contact angle of the cured product with water was tested according to GB / T 30693-2014 Plastic film and water contact angle measurement method, the water resistance was measured according to TCECS 548-2018, and other items were tested according to T / CBMF166-2022.

[0083] The test results of Examples 6 to 10 are shown in Table 7.

[0084] Table 7

[0085] The test results of Comparative Examples 1 to 3 are shown in Table 8.

[0086] Table 8

[0087] It can be seen from the above comparative examples that when unmodified tertiary amine accelerators commonly available on the market are used, the storage period is short, the surface drying time is long, and the stain resistance and UV stability are poor.

[0088] The present invention also compares commercially available caulking agent products, and the indicators of these commercially available caulking agent products are shown in Table 9 below.

[0089] Table 9

[0090] It can be seen that the seam beautifying agent prepared by the present invention has good bonding strength, hardness and flexibility, and has low VOC content, low odor, moderate operation time, fast surface drying time, and other good performances in various tolerance indicators.

[0091] It should be noted that the endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed in this article.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "specific implementations", or "some specific implementations" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An accelerator for a seam-beautifying agent, wherein the seam-beautifying agent adopts a thiol-acrylate curing system, characterized in that: The accelerator includes one or more compounds shown in structural formula I: The structural formula I is ; In the structural formula I, R1 is selected from , , , or ; R2 is each independently selected from , , , , or .

2. The method for preparing the accelerator according to claim 1, characterized in that: include: The bifunctional acrylate I and the alicyclic amine are mixed and reacted at 60-80° C. to obtain the accelerator.

3. The method for preparing the accelerator according to claim 2, characterized in that: The molar ratio of the difunctional acrylate I to the alicyclic amine is 4-5:

1.

4. The method for preparing the accelerator according to claim 2 or 3, characterized in that: The difunctional acrylate I is selected from 1,6-hexanediol diacrylate, 1,4-butanediol diacrylate, neopentyl glycol diacrylate, diethylene glycol diacrylate, ethylene glycol dimethacrylate or dimethacrylate; And / or, the alicyclic amine is selected from 4,4'-diaminodicyclohexylmethane, isophoronediamine, 1,3-cyclohexanedimethylamine, 3,3'-dimethyl-4,4-diaminodicyclohexylmethane or 1-methyl-2,4-cyclohexanediamine.

5. A seam beautifying agent, obtained by mixing component A and component B and curing them, characterized in that: The component A comprises an acrylate matrix and the accelerator according to claim 1 or the accelerator prepared by the preparation method according to any one of claims 2 to 4, and the component B comprises a thiol compound.

6. The seam beautifying agent according to claim 5, characterized in that: In parts by weight, component A includes: 85-100 parts of difunctional acrylate II, 1-4 parts of fluorine-containing acrylate, 2-4 parts of the accelerator, 0.5-2 parts of inhibitor and 10-15 parts of thixotropic agent I; And / or, in parts by weight, the component B comprises: 90 to 100 parts of a thiol compound, 3 to 10 parts of a diluent and 10 to 15 parts of a thixotropic agent II.

7. The seam beautifying agent according to claim 6, characterized in that: The bifunctional acrylate II is selected from one or a combination of two or more of 1,6-hexanediol diacrylate, 1,4-butanediol diacrylate, neopentyl glycol diacrylate, polyethylene glycol diacrylate, diethylene glycol diacrylate, ethylene glycol dimethacrylate and triethylene glycol dimethacrylate; And / or, the fluorine-containing acrylate is selected from one or a combination of two or more of perfluorobutyl acrylate, 2-(perfluorohexyl)ethyl methacrylate, 2-(perfluorohexyl)ethyl acrylate, 2-(perfluorobutyl)ethyl acrylate, 2-(perfluorohexyl)ethyl methacrylate, 2-(perfluorohexyl)acrylate, 2-(perfluorohexyl)ethyl acrylate, and 2-(perfluorooctyl)ethyl methacrylate; And / or, the polymerization inhibitor is dodecylphenol and / or 2,6-di-tert-butyl-p-cresol; And / or, the thiol compound is one or a combination of two or more of trimethylolpropane tris(3-mercaptoacetate), trimethylolpropane tris(3-mercaptopropionate), trimethylolpropane tris(3-mercaptobutyrate), pentaerythritol tetrakis(mercaptoacetate), pentaerythritol tetrakis(3-mercaptopropionate) and pentaerythritol tetrakis(3-mercaptobutyrate); And / or, the diluent is benzyl alcohol; And / or, the thixotropic agent I is fumed silica; And / or, the thixotropic agent II is fumed silica.

8. The seam beautifying agent according to any one of claims 5 to 7, characterized in that: In parts by weight, the component A comprises: 45 to 50 parts of 1,6-hexanediol diacrylate, 40 to 45 parts of ethylene glycol dimethacrylate, 2 to 3 parts of 2-(perfluorohexyl)ethyl methacrylate, 2 to 3 parts of the accelerator, 1 to 2 parts of dodecylphenol and 12 to 15 parts of fumed silica; And / or, in parts by weight, the component B comprises: 90 to 100 parts of pentaerythritol tetrakis(thioglycolate), 4 to 6 parts of benzyl alcohol and 12 to 15 parts of fumed silica.

9. The seam beautifying agent according to any one of claims 5 to 8, characterized in that: The mass ratio of the A component to the B component is 1-1.2:

1.

10. The method for preparing the seam beautifying agent according to any one of claims 5 to 9, characterized in that: Mix component A and component B at 5~25℃ and cure.

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