Preparation method of high-hardness wear-resistant coating coated with MS resin

Abstract

The invention discloses a preparation method of a high-hardness wear-resistant coating coated with MS resin, and belongs to the technical field of preparation of MS resin protective coatings. The preparation method comprises the following steps: mixing and stirring a double-bond-terminated pre-polymerized organic silicon-oxygen emulsion, an organic solvent, a high-temperature alkyl initiator and bisphenol A polycarbonate to form a coating solution; the MS resin is completely immersed in the coating liquid, and then a pulling process of 20 cm / min to 25 cm / min and a thermocuring process of treating for 2 h to 3 h at the temperature of 120 DEG C to 150 DEG C are sequentially carried out, so that the high-hardness wear-resistant coating coated with the MS resin is obtained. The preparation method comprises the following steps: carrying out ultrasonic pre-polymerization on an organic silicon oxygen compound monomer to obtain a double-bond-terminated pre-polymerized organic silicon oxygen emulsion, then mixing the pre-polymerized organic silicon oxygen emulsion with bisphenol A polycarbonate, and carrying out free radical addition with double bonds on MS resin under the catalytic action of a high-temperature alkyl initiator. And a coating coated with the MS resin has good adhesive force, hardness and wear resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of preparing MS resin protective coatings, and particularly relates to a method for preparing a high-hardness wear-resistant coating coated with MS resin. Background Art

[0002] MS resin, also known as methyl methacrylate-styrene copolymer, is a synthetic polymer material. It is formed by the copolymerization of methyl methacrylate (MMA) and styrene (ST). Developed in the early 20th century, MS resin gradually developed into a key engineering plastic over the following decades. It is primarily produced through free radical polymerization, a process in which MMA and ST are copolymerized in the presence of an initiator to produce a resin material with excellent properties. MMA provides high transparency, good weather resistance, and excellent optical properties, while ST enhances the material's rigidity and mechanical strength while reducing production costs. By adjusting the ratio of MMA to ST, the properties of MS resin can be tailored to achieve a balance between transparency, mechanical strength, and processability. Typically, the MMA content in MS resin is approximately 60-80%, while the ST content is 20-40%. Based on the excellent performance of MS resin, it has a wide range of applications in optical fields such as optical lenses and optical instruments, building materials such as transparent windows and sound insulation panels, automotive industry such as car lampshades, and transparent protective screens for mobile phones and tablets.

[0003] Although MS resin has many excellent properties, its surface inevitably has some technical difficulties. For example, the surface of MS resin is soft and easily scratched, which affects the appearance and transparency. Therefore, the protection of MS resin is particularly important.

[0004] Patent CN109651941A discloses a silicone-modified wear-resistant amphiphobic coating and its preparation method. The amphiphobic coating of the invention is composed of perfluoropolyether trimethoxysilane with a molecular weight of 3000-5000, perfluoropolyether methyldimethoxysilane with a molecular weight of 3000-5000 and perfluoroalkyltrimethoxysilane with an alkyl group of heptyl, octyl, nonyl or decyl. By using a compound mixture of fluorinated polyether alkoxysilanes and perfluoroalkylsiloxanes of different structures, an amphiphobic coating with a special three-dimensional structure is formed on the surface of the substrate by spraying or evaporation. This special structure gives the coating excellent wear resistance and anti-fouling properties, and is used for glass and ceramic surfaces.

[0005] Patent CN114350262A discloses a kind of bactericidal and antiviral super wear-resistant organosilicon coating liquid and preparation method thereof, organosilicon coating and preparation method thereof, the invention is solidified into film with three components of epoxy silane, amino silane and urea silane, these silanes are hydrolyzed to form silanol structure, wherein amino silane belongs to general amino silane coupling agent, can react with hydroxyl group in inorganic matter, can react with epoxy silane to form long molecular chain polymer again, thereby couples two kinds of materials with different properties. However, the alkalinity of these free amino groups is large, and the reactivity is high, and premature reaction is prone to occur during use and does not reach the expected result. And the introduction of urea silane (-Si-CCC-NH-CO-NH2) can reduce the reactivity with epoxy group, thereby maintaining certain limit working performance, so that the organosilicon coating liquid obtained by the invention is applied to glass, ceramics, marble, stainless steel, wood, PET, PC and PMMA surfaces.

[0006] Patent CN104927589A discloses a silicone wear-resistant hard coating and its preparation method. The coating is composed of epoxy resin, silane coupling agent and initiator. The initiator catalyzes the ring opening of the epoxy resin and cross-links with the silane coupling agent, thereby improving the bonding strength between the prepared coating liquid and the PMMA substrate.

[0007] The above coating liquid is mainly targeted at surfaces such as glass, ceramics, marble, stainless steel, wood, PET, PC and PMMA. As for MS resin, due to the different composition structure, conventional silicone coating liquid has difficulty adhering to the MS resin surface.

[0008] Therefore, designing a film that can improve the adhesion between the coating liquid and the MS resin, thereby achieving high hardness and wear-resistant protection for the MS resin, has practical application value. Summary of the Invention

[0009] To address the shortcomings of the prior art, the present invention analyzes the structural characteristics of methacrylate and styrene, the components of MS resin. First, an organosilicone monomer is ultrasonically prepolymerized to produce a double-bond-terminated prepolymerized organosilicone emulsion. This is then mixed with bisphenol A polycarbonate and, after catalysis by a high-temperature alkyl initiator, undergoes free radical addition to the double bonds of the MS resin, resulting in a high-hardness, wear-resistant coating coated with MS resin. This overcomes the problems of the prior art. Specifically, the present invention's technical solutions include the following:

[0010] One of the purposes of the present invention is to provide a method for preparing a high-hardness wear-resistant coating coated with MS resin, the preparation method comprising the following steps:

[0011] The double bond-terminated prepolymerized silicone emulsion, an organic solvent, a high-temperature alkyl initiator and bisphenol A polycarbonate are mixed and stirred to form a coating liquid;

[0012] The MS resin is completely immersed in the coating liquid, and then subjected to a pulling process at 20 cm / min to 25 cm / min and a heat curing process at 120° C. to 150° C. for 2 h to 3 h to obtain the high-hardness wear-resistant coating coated with the MS resin.

[0013] Furthermore, the preparation method of the double-bond terminated prepolymerized organic silicone emulsion comprises the following steps:

[0014] The organic silicon oxide compound monomer, acidic emulsifier and water are mixed and stirred in a mass ratio of 1:0.02-0.05:1-2 to uniformly disperse them, and then ultrasonically treated at a power of 600W-700W for 5min-10min to obtain the double-bond terminated prepolymerized organic silicon oxide emulsion.

[0015] Furthermore, the organic silicon oxide compound monomer includes at least three of ethylene trimethoxysilane, ethylene triethoxysilane, ethyl orthosilicate, vinyl triacetoxysilane, γ-aminopropyl triethoxysilane, γ-chloropropyl triethoxysilane, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, trimethyloxyphenylsilane and diphenyldimethoxysilane. The organic silicon oxide compound monomer must contain a carbon-carbon double bond structure or a cyclic structure containing a silicon oxide skeleton. The carbon-carbon double bond structure is used to undergo polymerization and curing with the MS resin through a high-temperature alkyl initiator, thereby improving the adhesion between the high-hardness wear-resistant coating and the MS resin. The cyclic structure containing the silicon oxide skeleton is used to improve the wear resistance and hardness of the coating.

[0016] Furthermore, the acidic emulsifier includes dodecylbenzenesulfonic acid or 4-dodecylbenzenesulfonic acid. The acidic emulsifier can not only reduce the interfacial tension and promote the solubility and dispersion performance between the organic silicon oxide compound monomers or between the organic silicon oxide compound monomers and water, but also play an acidic catalytic function, so that the organic silicon oxide compound can be hydrolyzed and condensed to form a double-bond-terminated prepolymerized organic silicon oxide emulsion.

[0017] Furthermore, the organic solvent includes dimethyl sulfoxide, acetone or tetrahydrofuran.

[0018] Furthermore, the high-temperature alkyl initiator includes di-tert-butyl peroxide, dicumyl peroxide or di-tert-amyl peroxide.

[0019] Furthermore, the bisphenol A polycarbonate includes PC LXTY 1609 or PC LXZY 1809.

[0020] Furthermore, the weight ratio of the double-bond terminated prepolymerized silicone emulsion: organic solvent: high-temperature alkyl initiator: bisphenol A polycarbonate is 30-50: 100-150: 0.3-0.5: 10-30.

[0021] A second object of the present invention is to provide a high-hardness wear-resistant coating coated with MS resin, which is prepared by the method for preparing a high-hardness wear-resistant coating coated with MS resin.

[0022] The third object of the present invention is to provide an application of a high-hardness wear-resistant coating coated with MS resin on the surface of MS resin.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The present invention creatively designs a high-hardness wear-resistant coating for MS resin, wherein an organic silicon oxide compound monomer with a cyclic structure containing a silicon oxide skeleton and an organic silicon oxide compound monomer with a carbon-carbon double bond structure are ultrasonically prepolymerized under the action of an acidic emulsifier to form a double-bond-terminated prepolymerized organic silicon oxide emulsion with a cross-linked network structure, and then mixed with bisphenol A type polycarbonate containing a benzene ring. Under the catalysis of a high-temperature alkyl initiator, the alkyl free radicals generated by the alkyl decomposition of the high-temperature alkyl initiator catalyze the growth between the compound chains, and the double-bond-terminated prepolymerized organic silicon oxide emulsion, the bisphenol A type polycarbonate containing a benzene ring and the MS resin undergo addition polymerization, thereby firmly fixing the coating liquid on the surface of the MS resin, improving the adhesion of the coating liquid on the surface of the MS resin, and the introduction of the cyclic structure of the benzene ring and the silicon oxide skeleton synergistically increases the rigidity of the polymer molecular chain, the interaction between molecules and within the molecule, and reduces the slippage of the molecular chain, further increasing the wear resistance and hardness of the coating formed after the coating liquid is applied on the MS resin and cured.

[0025] (2) Comparative Example 1 shows that since the constituent monomers of the obtained prepolymerized organic silicone emulsion do not contain carbon-carbon double bonds and a cyclic structure of a silicon-oxygen skeleton, the obtained prepolymerized organic silicone emulsion has a poor polymerization effect with the MS resin, low adhesion, low wear resistance and low hardness.

[0026] (3) Comparative Example 2 shows that due to the abandonment of the ultrasonic treatment process, the organic silicon oxide compound loses the ultrasonic cavitation effect, the short-term prepolymerization effect is poor, the cross-linking density is low, and the wear resistance and hardness of the coating finally cured on the MS resin surface are poor.

[0027] (4) Comparative Example 3 shows that, due to the absence of an acidic emulsifier, the interfacial tension between the organic silicon oxide monomer and water is large, the prepolymerization effect is poor, the crosslinking density is low, and the wear resistance and hardness of the coating finally cured on the MS resin surface are poor.

[0028] (5) Comparative Example 4 shows that, since azobisisobutyronitrile is suitable for catalysis in low-temperature environments, in the high-temperature polymerization of the present invention, the catalytic effect of azobisisobutyronitrile is poor, and the adhesion, wear resistance and hardness of the coating are all poor. This may be because the high temperature causes the decomposition of azobisisobutyronitrile to accelerate, and a good polymerization effect cannot be achieved.

[0029] (6) Comparative Example 5 shows that although a coating can be prepared using polycarbonate that does not contain a benzene ring, the coating has poor wear resistance and hardness. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions of the present invention through the embodiments of the present invention. Obviously, the embodiments described are only 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 those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] Unless otherwise specified, the raw materials and reagents used in the present invention are commercially available or can be prepared by known methods.

[0032] Preparation Example 1:

[0033] The preparation method of double-bond terminated prepolymerized silicone emulsion specifically includes the following steps:

[0034] 100 g of ethylenetrimethoxysilane, 200 g of ethyl orthosilicate, 200 g of hexamethylcyclotrisiloxane, 10 g of dodecylbenzenesulfonic acid and 500 g of deionized water were mixed and added to a flask. The mixture was first stirred at a speed of 200 r / min with a magnetic stirrer until uniformly dispersed. The flask was then placed in an ultrasonic cleaning machine with an ultrasonic power set to 600 W. The ultrasonic treatment was then started for 5 minutes to obtain a double-bond-terminated prepolymerized silicone emulsion.

[0035] Preparation Example 2:

[0036] The preparation method of double-bond terminated prepolymerized silicone emulsion specifically includes the following steps:

[0037] 100 g of ethylenetriethoxysilane, 300 g of γ-aminopropyltriethoxysilane, 100 g of octamethylcyclotetrasiloxane, 15 g of dodecylbenzenesulfonic acid and 600 g of deionized water were mixed and added to a flask. The mixture was stirred at a speed of 200 r / min with a magnetic stirrer until uniformly dispersed. The flask was then placed in an ultrasonic cleaning machine with an ultrasonic power set to 600 W. The ultrasonic treatment was then started for 6 minutes to obtain a double-bond-terminated prepolymerized silicone emulsion.

[0038] Preparation Example 3:

[0039] The preparation method of double-bond terminated prepolymerized silicone emulsion specifically includes the following steps:

[0040] 100 g of vinyltriacetoxysilane, 100 g of γ-chloropropyltriethoxysilane, 100 g of hexamethylcyclotrisiloxane, 200 g of trimethyloxyphenylsilane, 20 g of dodecylbenzenesulfonic acid and 700 g of deionized water were mixed and added to a flask. The mixture was stirred at a speed of 250 r / min with a magnetic stirrer until uniformly dispersed. The flask was then placed in an ultrasonic cleaner, the ultrasonic power was set to 650 W, and ultrasonic treatment was started for 7 minutes to obtain a double-bond-terminated prepolymerized silicone emulsion.

[0041] Preparation Example 4:

[0042] The preparation method of double-bond terminated prepolymerized silicone emulsion specifically includes the following steps:

[0043] 100 g of ethylenetrimethoxysilane, 200 g of hexamethylcyclotrisiloxane, 200 g of diphenyldimethoxysilane, 25 g of 4-dodecylbenzenesulfonic acid and 800 g of deionized water were mixed and added to a flask. The mixture was stirred at a speed of 250 r / min with a magnetic stirrer until uniformly dispersed. The flask was then placed in an ultrasonic cleaning machine with an ultrasonic power set to 650 W. The ultrasonic treatment was then started for 8 min to obtain a double-bond-terminated prepolymerized organic silicone emulsion.

[0044] Preparation Example 5:

[0045] The preparation method of double-bond terminated prepolymerized silicone emulsion specifically includes the following steps:

[0046] 100 g of ethylenetriethoxysilane, 200 g of octamethylcyclotetrasiloxane, 200 g of trimethyloxyphenylsilane, 25 g of 4-dodecylbenzenesulfonic acid and 900 g of deionized water were mixed and added to a flask. The mixture was stirred at a speed of 300 r / min with a magnetic stirrer until uniformly dispersed. The flask was then placed in an ultrasonic cleaning machine with an ultrasonic power set to 700 W. The ultrasonic treatment was then started for 9 minutes to obtain a double-bond-terminated prepolymerized silicone emulsion.

[0047] Preparation Example 6:

[0048] The preparation method of double-bond terminated prepolymerized silicone emulsion specifically includes the following steps:

[0049] 200 g of ethylenetriethoxysilane, 100 g of octamethylcyclotetrasiloxane, 100 g of trimethyloxyphenylsilane, 100 g of diphenyldimethoxysilane, 25 g of 4-dodecylbenzenesulfonic acid and 1000 g of deionized water were mixed and added to a flask. The mixture was first stirred at a speed of 300 r / min with a magnetic stirrer until it was uniformly dispersed. The flask was then placed in an ultrasonic cleaning machine, the ultrasonic power was set to 700 W, and ultrasonic treatment was started for 10 minutes to obtain a double-bond-terminated prepolymerized silicone emulsion.

[0050] Preparation Example 7:

[0051] The preparation method of pre-polymerized organic silicone emulsion specifically includes the following steps:

[0052] 100 g of ethyl orthosilicate, 200 g of γ-aminopropyltriethoxysilane, 200 g of γ-chloropropyltriethoxysilane, 25 g of 4-dodecylbenzenesulfonic acid and 1000 g of deionized water were mixed and added to a flask. The mixture was stirred at a speed of 300 r / min with a magnetic stirrer until uniformly dispersed. The flask was then placed in an ultrasonic cleaning machine with an ultrasonic power set to 700 W. The ultrasonic treatment was then started for 10 min to obtain a double-bond-terminated prepolymerized organic silicone emulsion.

[0053] Preparation Example 8:

[0054] The preparation method of double-bond terminated prepolymerized silicone emulsion specifically includes the following steps:

[0055] 200 g of ethylenetriethoxysilane, 100 g of octamethylcyclotetrasiloxane, 100 g of trimethyloxyphenylsilane, 100 g of diphenyldimethoxysilane, 25 g of 4-dodecylbenzenesulfonic acid and 1000 g of deionized water were mixed and added to a flask, and stirred at a speed of 300 r / min for 10 min using a magnetic stirrer to obtain a double-bond-terminated prepolymerized silicone emulsion.

[0056] Preparation Example 9:

[0057] The preparation method of double-bond terminated prepolymerized silicone emulsion specifically includes the following steps:

[0058] 200 g of ethylenetriethoxysilane, 100 g of octamethylcyclotetrasiloxane, 100 g of trimethyloxyphenylsilane, 100 g of diphenyldimethoxysilane and 1000 g of deionized water were mixed and added to a flask. The mixture was first stirred at a speed of 300 r / min with a magnetic stirrer until uniformly dispersed. The flask was then placed in an ultrasonic cleaning machine, the ultrasonic power was set to 700 W, and ultrasonic treatment was started for 10 minutes to obtain a double-bond-terminated prepolymerized silicone emulsion.

[0059] Example 1:

[0060] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0061] 30 parts by weight of the double-bond-terminated prepolymerized silicone emulsion from Preparation Example 1, 100 parts by weight of dimethyl sulfoxide, 0.3 parts by weight of di-tert-butyl peroxide, and 10 parts by weight of PC LXTY 1609 bisphenol A polycarbonate were mixed and stirred at 100 rpm for 30 minutes to form a coating solution. The MS resin was sanded to remove any peeling and then placed in an ultrasonic cleaner. The MS resin was then cleaned with deionized water and the surface moisture was dried. The dried MS resin was then completely immersed in the coating solution and pulled upward and out of the coating solution at a pulling speed of 20 cm / min. The MS resin, now soaked in the coating solution, was then placed in a high-temperature environment at 120°C for 2 hours for heat curing, followed by natural cooling to obtain a high-hardness, wear-resistant coating coated with the MS resin.

[0062] Example 2:

[0063] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0064] 35 parts by weight of the double-bond-terminated prepolymerized silicone emulsion from Preparation Example 2, 110 parts by weight of dimethyl sulfoxide, 0.3 parts by weight of di-tert-butyl peroxide, and 15 parts by weight of PC LXTY 1609 bisphenol A polycarbonate were mixed and stirred at 100 rpm for 30 minutes to form a coating solution. The MS resin was sanded to remove any peeling and then placed in an ultrasonic cleaner. The MS resin was then cleaned with deionized water and dried to remove any surface moisture. The dried MS resin was then completely immersed in the coating solution and pulled upwards out of the coating solution at a pulling speed of 21 cm / min. The MS resin, now soaked in the coating solution, was then placed in a high-temperature environment at 130°C for 2 hours for heat curing, followed by natural cooling to obtain a high-hardness, wear-resistant coating coated with the MS resin.

[0065] Example 3:

[0066] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0067] 40 parts by weight of the double-bond-terminated prepolymerized silicone emulsion from Preparation Example 3, 120 parts by weight of acetone, 0.4 parts by weight of dicumyl peroxide, and 25 parts by weight of PC LXTY 1609 bisphenol A polycarbonate were mixed and stirred at 200 rpm for 20 minutes to form a coating solution. The MS resin was sanded to remove any peeling and then placed in an ultrasonic cleaner. The MS resin was then cleaned with deionized water and the surface moisture was dried. The dried MS resin was then completely immersed in the coating solution and pulled upward and out of the coating solution at a pulling speed of 22 cm / min. The MS resin, now soaked in the coating solution, was then placed in a high-temperature environment at 130°C for 2 hours for heat curing, followed by natural cooling to obtain a high-hardness, wear-resistant coating coated with the MS resin.

[0068] Example 4:

[0069] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0070] 45 parts by weight of the double-bond-terminated prepolymerized silicone emulsion from Preparation Example 4, 130 parts by weight of acetone, 0.4 parts by weight of dicumyl peroxide, and 25 parts by weight of PC LXTY 1809 bisphenol A polycarbonate were mixed and stirred at 200 rpm for 20 minutes to form a coating solution. The MS resin was sanded to remove any peeling and then placed in an ultrasonic cleaner. The MS resin was then cleaned with deionized water and the surface moisture was dried. The dried MS resin was then completely immersed in the coating solution and pulled upward and out of the coating solution at a pulling speed of 23 cm / min. The MS resin, now soaked in the coating solution, was then placed in a high-temperature environment at 140°C for 3 hours for heat curing, followed by natural cooling to obtain a high-hardness, wear-resistant coating coated with the MS resin.

[0071] Example 5:

[0072] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0073] 50 parts by weight of the double-bond-terminated prepolymerized silicone emulsion from Preparation Example 5, 140 parts by weight of tetrahydrofuran, 0.5 parts by weight of di-tert-amyl peroxide, and 30 parts by weight of PC LXTY 1809 bisphenol A polycarbonate were mixed and stirred at 300 r / min for 10 minutes to form a coating solution. The MS resin was sanded to remove any peeling and then placed in an ultrasonic cleaner. The MS resin was then cleaned with deionized water and the surface moisture was dried. The dried MS resin was then completely immersed in the coating solution and pulled upwards out of the coating solution at a pulling speed of 24 cm / min. The MS resin, now soaked in the coating solution, was then placed in a high-temperature environment at 140°C for 3 hours for heat curing, followed by natural cooling to obtain a high-hardness, wear-resistant coating coated with the MS resin.

[0074] Example 6:

[0075] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0076] 50 parts by weight of the double-bond-terminated prepolymerized silicone emulsion from Preparation Example 6, 150 parts by weight of tetrahydrofuran, 0.5 parts by weight of di-tert-amyl peroxide, and 30 parts by weight of PC LXTY 1809 bisphenol A polycarbonate were mixed and stirred at 300 rpm for 10 minutes to form a coating solution. The MS resin was sanded to remove any peeling and then placed in an ultrasonic cleaner. The MS resin was then cleaned with deionized water and the surface moisture was dried. The dried MS resin was then completely immersed in the coating solution and pulled upwards out of the coating solution at a pulling speed of 25 cm / min. The MS resin, now soaked in the coating solution, was then placed in a high-temperature environment at 150°C for 3 hours for heat curing, followed by natural cooling to obtain a high-hardness, wear-resistant coating coated with the MS resin.

[0077] Comparative Example 1:

[0078] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0079] The double-bond terminated prepolymerized organic silicone emulsion in Example 6 was replaced by the prepolymerized organic silicone emulsion in Preparation Example 7, and the other conditions remained the same as in Example 6.

[0080] Comparative Example 2:

[0081] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0082] The double-bond terminated prepolymerized organic silicone emulsion in Example 6 was replaced by the double-bond terminated prepolymerized organic silicone emulsion in Preparation Example 8, and the other conditions remained the same as in Example 6.

[0083] Comparative Example 3:

[0084] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0085] The double-bond terminated prepolymerized organic silicone emulsion in Example 6 was replaced by the double-bond terminated prepolymerized organic silicone emulsion in Preparation Example 9, and the other conditions remained the same as in Example 6.

[0086] Comparative Example 4:

[0087] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0088] The di-tert-amyl peroxide in Example 6 was replaced by azobisisobutyronitrile, and the other conditions remained the same as in Example 6.

[0089] Comparative Example 5:

[0090] A method for preparing a high-hardness wear-resistant coating coated with MS resin, specifically comprising the following steps:

[0091] The bisphenol A polycarbonate PC LXTY 1809 in Example 6 was replaced by poly(1,4-butylene adipate), and the other conditions remained the same as in Example 6.

[0092] The hardness and adhesion of the high hardness and wear-resistant coating coated with MS resin obtained in Examples 1 to 6 and Comparative Examples 1 to 5 were measured according to "GB / T6739-2022 Paints and varnishes pencil method for determination of film hardness" and "GB / T9286-2021 Paints and varnishes cross-cut test". The results are shown in Table 1 below.

[0093] Table 1 Hardness and adhesion test of high hardness wear-resistant coating

[0094] Sources Hardness (H) Adhesion (grade) MS resin 3 / Example 1 3 3 Example 2 4 3 Example 3 5 2 Example 4 4 3 Example 5 4 2 Example 6 5 2 Comparative Example 1 1 5 Comparative Example 2 2 3 Comparative Example 3 2 3 Comparative Example 4 2 4 Comparative Example 5 1 4

[0095] The high hardness wear-resistant coatings coated with MS resin obtained in Examples 1 to 6 and Comparative Examples 1 to 5 were rubbed 100 times at the same speed using 600# sandpaper loaded with a 100 g weight. The rubbed materials were weighed at the 20th, 50th and 100th times, and the total accumulated wear weight was calculated. The results are shown in Table 2 below.

[0096] Table 2 Wear resistance test

[0097]

[0098] The above embodiments are provided to illustrate the technical solutions and beneficial effects of the present invention in detail. It should be understood that the above embodiments are merely specific embodiments of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A method for preparing a high-hardness wear-resistant coating coated with MS resin, characterized in that: The preparation method comprises the following steps: The double bond-terminated prepolymerized silicone emulsion, an organic solvent, a high-temperature alkyl initiator and bisphenol A polycarbonate are mixed and stirred to form a coating liquid; The MS resin is completely immersed in the coating liquid, and then subjected to a pulling process at 20 cm / min to 25 cm / min and a heat curing process at 120° C. to 150° C. for 2 h to 3 h to obtain the high-hardness wear-resistant coating coated with the MS resin.

2. The method for preparing a high-hardness wear-resistant coating coated with MS resin according to claim 1, characterized in that: The preparation method of the double-bond terminated prepolymerized organic silicone emulsion comprises the following steps: The organic silicon oxide compound monomer, acidic emulsifier and water are mixed and stirred in a mass ratio of 1:0.02-0.05:1-2 to uniformly disperse them, and then ultrasonically treated at a power of 600W-700W for 5min-10min to obtain the double-bond terminated prepolymerized organic silicon oxide emulsion.

3. The method for preparing a high-hardness wear-resistant coating coated with MS resin according to claim 2, characterized in that: The organic silicon oxide compound monomers include at least three of ethylene trimethoxysilane, ethylene triethoxysilane, ethyl orthosilicate, vinyl triacetoxysilane, γ-aminopropyl triethoxysilane, γ-chloropropyl triethoxysilane, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, trimethyloxyphenylsilane and diphenyldimethoxysilane.

4. The method for preparing a high-hardness wear-resistant coating coated with MS resin according to claim 2, characterized in that: The acidic emulsifier includes dodecylbenzenesulfonic acid or 4-dodecylbenzenesulfonic acid.

5. The method for preparing a high-hardness wear-resistant coating coated with MS resin according to claim 1, characterized in that: The organic solvent includes dimethyl sulfoxide, acetone or tetrahydrofuran.

6. The method for preparing a high-hardness wear-resistant coating coated with MS resin according to claim 1, characterized in that: The high-temperature alkyl initiator includes di-tert-butyl peroxide, dicumyl peroxide or di-tert-amyl peroxide.

7. The method for preparing a high-hardness wear-resistant coating coated with MS resin according to claim 1, characterized in that: The bisphenol A polycarbonate includes PC LXTY 1609 or PC LXZY 1809.

8. The method for preparing a high-hardness wear-resistant coating coated with MS resin according to claim 1, characterized in that: The weight ratio of the double-bond terminated prepolymerized organic silicone emulsion: the organic solvent: the high-temperature alkyl initiator: the bisphenol A polycarbonate is 30-50: 100-150: 0.3-0.5: 10-30.

9. A high-hardness wear-resistant coating coated with MS resin, obtained by the method for preparing a high-hardness wear-resistant coating coated with MS resin according to any one of claims 1 to 8.

10. Use of the high hardness wear-resistant coating coated with MS resin prepared by the method for preparing a high hardness wear-resistant coating coated with MS resin according to any one of claims 1 to 8 or the high hardness wear-resistant coating according to claim 9 on the surface of MS resin.

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