CN112266438B - Methyl methacrylate polymer and preparation method and application thereof - Google Patents
Methyl methacrylate polymer and preparation method and application thereof Download PDFInfo
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- CN112266438B CN112266438B CN202011216723.7A CN202011216723A CN112266438B CN 112266438 B CN112266438 B CN 112266438B CN 202011216723 A CN202011216723 A CN 202011216723A CN 112266438 B CN112266438 B CN 112266438B
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/068—Copolymers with monomers not covered by C09D133/06 containing glycidyl groups
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Abstract
The invention relates to the technical field of waterproof coatings, and particularly relates to a methyl methacrylate polymer and a preparation method and application thereof. The methyl methacrylate polymer is mainly polymerized by taking methyl methacrylate as a monomer; which contain carbon-carbon unsaturation. The preparation method comprises the steps of carrying out polymerization reaction on methyl methacrylate, glycidyl methacrylate or glycidyl acrylate and azobisisobutyronitrile at the temperature of 40-60 ℃ for 0.5-1h to obtain a methyl methacrylate prepolymer containing epoxy side groups; adding 500-1000ppm of polymerization inhibitor and acrylic monomer into the methyl methacrylate prepolymer, and reacting at 100-120 ℃ for 1-3h to obtain the methyl methacrylate polymer. The invention solves the problem that methyl methacrylate prepolymer as film forming material can not be stably fused with active diluent by introducing carbon-carbon unsaturated group, and has higher stability and mechanical property.
Description
Technical Field
The invention relates to the technical field of waterproof coatings, and particularly relates to a methyl methacrylate polymer and a preparation method and application thereof.
Background
Waterproof coatings are common building materials in the field of construction at present. The waterproof coating forms a waterproof film after being cured, has certain extensibility, elastoplasticity, crack resistance, impermeability and weather resistance, and can play a certain role in waterproofing, seepage prevention and protection.
The acrylic resin has excellent light and color retention and is an ideal outdoor waterproof material.
At present, acrylic resin is used for preparing high-solid acrylic resin waterproof paint, and the adopted solvent is a toxic organic volatile solvent, or a large amount of hydrophilic group solvent is adopted for preparing the water-based waterproof paint, so that the waterproof performance has natural performance defects.
Patent publication No. CN108373519 discloses a solvent-free, quick-drying, ultra-high solids content, methyl methacrylate coating, which uses a polymethyl methacrylate prepolymer as a film forming material, and iso-octyl methacrylate and dodecyl methacrylate as reactive diluents (finally cured in the coating by reaction). Although the problems of environmental protection and low performance can be solved at the same time, the methyl methacrylate prepolymer can be linked with the cured product of the reactive diluent only through weak interaction (such as Van der Waals force), and finally the mechanical performance of the coating is poor.
Disclosure of Invention
Technical problem to be solved
In view of the above disadvantages and shortcomings of the prior art, the present invention provides a methyl methacrylate polymer, which solves the problem that a methyl methacrylate prepolymer as a film-forming material cannot be stably fused with an active diluent by introducing a carbon-carbon unsaturated group, and has high stability and mechanical properties.
Correspondingly, the invention also provides a preparation method of the methyl methacrylate polymer.
Accordingly, the present invention also provides applications of the above-mentioned methyl methacrylate polymer, including applications in solvent-free methyl methacrylate resins and applications in transparent waterproof coatings.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
in a first aspect, embodiments of the present invention provide a methyl methacrylate polymer, which is mainly formed by condensing methyl methacrylate as a monomer; which contain carbon-carbon unsaturation.
The structural formula is as follows:
in a second aspect, embodiments of the present invention provide a method for preparing a methyl methacrylate polymer, comprising the steps of:
s1, carrying out polymerization reaction on glycidyl methacrylate or glycidyl acrylate, methyl methacrylate and azobisisobutyronitrile at 40-60 ℃ for 0.5-1h to obtain a methyl methacrylate prepolymer containing epoxy side groups;
s2 introduction of activated carbon-carbon double bond
Adding 500-1000ppm of polymerization inhibitor and acrylic monomer into the methyl methacrylate prepolymer, and reacting at 100-120 ℃ for 1-3h to obtain the methyl methacrylate polymer.
Alternatively, the acrylic may be, but is not limited to, acrylic acid, methacrylic acid, itaconic acid.
Optionally, the polymerization inhibitor is one or a combination of more than two of hydroquinone, p-benzoquinone, methyl hydroquinone, p-hydroxyanisole, 2-tert-butyl hydroquinone and 2,5-tert-butyl hydroquinone.
In a third aspect, an embodiment of the present invention provides a solvent-free methyl methacrylate resin, which includes the following components in parts by weight: 50 to 70 parts of the methyl methacrylate polymer and 19 to 80 parts of the acrylate compound.
Alternatively, the acrylate compound is one or a combination of two or more of methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, behenyl acrylate, tert-butyl acrylate, heptadecyl acrylate, isooctyl acrylate, isobornyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, behenyl methacrylate, tert-butyl methacrylate, heptadecyl methacrylate, isooctyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate, ethylene glycol dimethacrylate, butanediol dimethacrylate, hexanediol diacrylate, allyl methacrylate, trimethylolpropane triacrylate, propoxylated glycerol triacrylate, hexanediol dimethacrylate, tripropylene glycol diacrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol triacrylate, tris (2-hydroxyethyl) isocyanate triacrylate, pentaerythritol penta/hexaacrylate, neopentyl glycol diethoxy diacrylate, propoxylated multifunctional acrylate.
Alternatively, the Tg temperature is from 20 to 40 ℃.
In a fourth aspect, the embodiments of the present invention provide an application of the above solvent-free methyl methacrylate resin in a transparent waterproof coating.
Optionally, the transparent waterproof coating comprises a first ingredient and a second ingredient, wherein the first ingredient comprises the following components: solvent-free methyl methacrylate resin, an accelerator, a rheological aid and a light stabilizer;
the second ingredient comprises the following components: benzoyl peroxide.
Optionally, the first ingredient comprises the following components in parts by weight: 60-80 parts of solvent-free methyl methacrylate resin, 3238 parts of accelerator 3238 zxft, 3262 parts of rheological additive 3262 zxft And 0.2-1 part of light stabilizer.
(III) advantageous effects
The invention has the beneficial effects that:
the methyl methacrylate polymer of the invention introduces activated carbon-carbon unsaturated groups, and when the methyl methacrylate polymer is applied to coating and cured, the methyl methacrylate polymer can be linked with a cured product of an activated diluent together by carbon-carbon covalent bonds in a manner of copolymerization of double bonds or triple bonds in the carbon-carbon unsaturated groups and an acrylate activated diluent, so that the mechanical property of the methyl methacrylate polymer is improved.
Among them, the methyl methacrylate polymer of the present invention has a solubility close to that of a reactive diluent such as (meth) acrylate, has a problem of phase separation, and gives a coating having high transparency.
In the preparation method, an epoxy group is introduced to a prepolymer of methyl methacrylate by a way of copolymerizing methyl methacrylate and glycidyl methacrylate, and an active double bond is introduced to the prepolymer of methyl methacrylate by the reaction of the epoxy group of the glycidyl methacrylate and (meth) acrylic acid, so that the methyl methacrylate polymer is successfully prepared.
Drawings
FIG. 1 is a reaction schematic diagram of the invention for generating a methyl methacrylate prepolymer containing epoxy side groups;
FIG. 2 is a schematic diagram of the reaction of the present invention to produce a methyl methacrylate polymer containing an unsaturated group.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof.
[ first embodiment ] to provide a toner
In order to overcome the technical problem that in the methyl methacrylate coating, a polymethyl methacrylate prepolymer is adopted as a film forming material and can only be linked with a cured material of an active diluent through weak interaction (such as Van der Waals force) to finally cause poor mechanical property of a coating, the embodiment of the invention provides a methyl methacrylate polymer which is mainly formed by condensing methyl methacrylate as a monomer; which contain carbon-carbon unsaturation. The acrylate reactive diluent can be linked with a cured product of the reactive diluent by a carbon-carbon covalent bond in a manner of copolymerizing a double bond or a triple bond in a carbon-carbon unsaturated group with the acrylate reactive diluent, so that the mechanical property of the acrylate reactive diluent is improved. In addition, since the methyl methacrylate polymer obtained by the present invention has a solubility close to that of a reactive diluent such as (meth) acrylate by introducing a carbon-carbon unsaturated group, it has a problem of phase separation and the resulting coating has high transparency.
Further, the compound is specifically a compound of the structural formula shown in the formula I:
is like
[ second embodiment ] to provide a medicine for treating diabetes
The invention provides a preparation method of the methyl methacrylate polymer, which comprises the following steps:
s1, carrying out polymerization reaction on glycidyl methacrylate or glycidyl acrylate, methyl methacrylate and azodiisobutyronitrile at 40-60 ℃ for 0.5-1h to obtain a methyl methacrylate prepolymer containing epoxy side groups;
s2 introduction of activated carbon-carbon double bond
Adding 500-1000ppm of polymerization inhibitor and acrylic monomer into the methyl methacrylate prepolymer, and reacting at 100-120 ℃ for 1-3h to obtain the methyl methacrylate polymer.
The specific reaction formula of step S1 may be a reaction as shown in fig. 1, which realizes the introduction of epoxy side group into the methyl methacrylate prepolymer, wherein the epoxy side group is aimed at introducing an active double bond through the reaction of epoxy group and acrylic monomer in step S2, and the acrylic monomer may be, but not limited to, acrylic acid, (meth) acrylic acid, itaconic acid.
. The acrylic monomer added, and glycidyl methacrylate or glycidyl acrylate in equimolar amounts. The specific reaction formula of step S2 is shown in FIG. 2.
In the step S1, the components in parts by weight are as follows: 40 to 60 parts of methyl methacrylate, 1~5 parts of glycidyl methacrylate or glycidyl acrylate and 0.6 to 0.8 part of azodiisobutyronitrile.
Further, the polymerization inhibitor is one or a combination of two or more of hydroquinone, p-benzoquinone, methyl hydroquinone, p-hydroxyanisole, 2-tert-butyl hydroquinone and 2,5-tert-butyl hydroquinone.
[ third embodiment ]
The invention is to prepare the solventless resin by copolymerizing the methyl methacrylate polymer and the active diluent, so as to be convenient for preparing the coating.
The solvent-free methyl methacrylate resin comprises the following components in parts by weight: 50 to 70 parts of methyl methacrylate polymer and 19 to 80 parts of acrylate compound.
The invention takes the acrylate compound as the active diluent, has similar solubility with the methyl methacrylate polymer, does not have the phase separation phenomenon, and can improve the mechanical property.
Wherein the acrylate compound is one or a combination of two or more of methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, behenyl acrylate, tert-butyl acrylate, heptadecyl acrylate, isooctyl acrylate, isobornyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, behenyl methacrylate, tert-butyl methacrylate, heptadecyl methacrylate, isooctyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate, ethylene glycol dimethacrylate, butanediol dimethacrylate, hexanediol diacrylate, allyl methacrylate, trimethylolpropane triacrylate, propoxylated glycerol triacrylate, hexanediol dimethacrylate, tripropylene glycol diacrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol triacrylate, tris (2-hydroxyethyl) isocyanate triacrylate, pentaerythritol penta/hexaacrylate, neopentyl glycol diethoxy diacrylate, propoxylated multifunctional acrylate.
The Tg temperature of the solvent-free methyl methacrylate resin obtained by the invention is 20-40 ℃, and the solvent-free methyl methacrylate resin has the best mechanical property and transparency.
Wherein the glass transition temperature (Tg) can be calculated according to the design FOX formula for glass transition temperature:
1/Tg＝W 1 /Tg 1 +W 2 /Tg 2 +W 3 /Tg 3 + ...+W n /Tg n
wherein Tg is the glass transition temperature of the product polymer, W n Is the mass fraction of the nth monomer, tg n The nth monomer corresponds to the glass transition temperature of the homopolymer.
[ MEANS FOR CARRYING OUT THE INVENTION ] A
The invention provides the application of the solvent-free methyl methacrylate resin in the transparent waterproof coating.
The transparent waterproof coating comprises a first ingredient and a second ingredient, wherein the first ingredient comprises the following components: solvent-free methyl methacrylate resin, an accelerator, a rheological aid and a light stabilizer;
the first ingredient comprises the following components in parts by weight:
the first ingredient comprises the following components in parts by weight: 60-80 parts of solvent-free methyl methacrylate resin, 3238 parts of accelerator 3238 zxft, 3262 parts of rheological additive 3262 zxft And 0.2-1 part of light stabilizer.
The light stabilizer comprises 0.1 to 0.5 part of benzotriazole light stabilizer and 0.1 to 0.5 part of hindered amine light stabilizer.
Wherein, the accelerant includes but not limited to one or two of N, N-dimethyl paratoluidine and N, N-dimethylaniline.
Wherein, the rheological additive comprises one or two of fumed silica and organic modified bentonite.
The second ingredient comprises the following components: benzoyl peroxide.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below. While the following shows exemplary embodiments of the invention, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
The preparation method of the solvent-free methyl methacrylate resin comprises the following steps:
s1 synthesis of methyl methacrylate prepolymer with epoxy side group
Under the condition of stirring, adding 40 parts of methyl methacrylate, 5 parts of glycidyl methacrylate and 0.7 part of azobisisobutyronitrile into a reaction kettle, and polymerizing at the temperature of 40 ℃ for 1 hour to obtain a methyl methacrylate prepolymer with an epoxy side group;
s2 introduces activated carbon-carbon double bond
Continuously adding 500ppm of hydroquinone and 3.94 parts of acrylic acid into the reaction kettle, and reacting for 3 hours at 120 ℃ to obtain a methyl methacrylate polymer containing activated carbon-carbon double bonds;
introduction of S3 (methyl) acrylic ester active monomer
And reacting the obtained 50 parts of methyl methacrylate polymer containing activated carbon-carbon double bonds, 35 parts of methyl methacrylate and 15 parts of butyl acrylate in a reaction kettle to obtain the solvent-free methyl methacrylate resin.
Example 2
The preparation method of the solvent-free methyl methacrylate resin comprises the following steps:
synthesis of S1 methyl methacrylate prepolymer with epoxy side group
Adding 50 parts of methyl methacrylate, 3 parts of glycidyl methacrylate and 0.6 part of azobisisobutyronitrile into a reaction kettle, and polymerizing at 50 ℃ for 1 hour to obtain a methyl methacrylate prepolymer with epoxy side groups;
s2 introduction of activated carbon-carbon double bond
Continuously adding 750ppm of hydroquinone and 5.91 parts of acrylic acid into the reaction kettle, and reacting for 2 hours at 100 ℃ to obtain a methyl methacrylate polymer containing activated carbon-carbon double bonds;
introduction of S3 (methyl) acrylic ester active monomer
The obtained 60 parts of methyl methacrylate polymer containing activated carbon-carbon double bonds, 12.5 parts of methyl methacrylate and 37.5 parts of butyl methacrylate are reacted in a reaction kettle to obtain the solvent-free methyl methacrylate resin.
Example 3
The preparation method of the solvent-free methyl methacrylate resin comprises the following steps:
s1 synthesis of methyl methacrylate prepolymer with epoxy side group
Adding 60 parts of methyl methacrylate, 1 part of glycidyl methacrylate and 0.8 part of azodiisobutyronitrile into a reaction kettle, polymerizing at the temperature of 60 ℃, and reacting for 0.5h to obtain a methyl methacrylate prepolymer with an epoxy side group;
s2 introduces activated carbon-carbon double bond
Continuously adding 1000ppm of hydroquinone and 1.97 parts of acrylic acid into the reaction kettle, and reacting for 1 hour at 110 ℃ to obtain a methyl methacrylate polymer containing activated carbon-carbon double bonds;
introduction of S3 (methyl) acrylic ester active monomer
And reacting 70 parts of the obtained methyl methacrylate polymer containing the activated carbon-carbon double bond, 5 parts of methyl methacrylate and 45 parts of butyl methacrylate in a reaction kettle to obtain the solvent-free methyl methacrylate resin.
Example 4
In this example, the solvent-free methyl methacrylate resin prepared in example 1~3 was used as the resin raw material to prepare the transparent waterproof coating, which comprises a first ingredient and a second ingredient,
the amounts of the components in the first furnish are shown in table 1 below.
TABLE 1 dosage of the first ingredient (parts by weight)
| Group number | Hybrid resin | Accelerator | Rheology aid | Light stabilizers |
| 1 | Example 1 resin 80 parts | 1 | 2 | 0.3 |
| 2 | Example 1 resin 60 parts | 1 | 2 | 0.3 |
| 3 | Example 2 resin 60 parts | 1 | 2 | 0.3 |
| 4 | Example 2 resin 70 parts | 1 | 2 | 0.3 |
| 5 | Example 3 resin 70 parts | 1 | 2 | 0.3 |
Tests show that the resin obtained in group No. 3 has obviously higher transparency and waterproof performance than other groups when used for preparing transparent waterproof paint, and the waterproof paint prepared by the resin obtained in the group Nos. 1 to 5 has no phase separation phenomenon.
The preparation steps of the first ingredient are as follows:
uniformly mixing the solvent-free methyl methacrylate resin, the accelerator, the rheological additive and the light stabilizer, filtering and discharging to obtain a first ingredient.
The second ingredient is dibenzoyl peroxide.
When in use, the first ingredient and the second ingredient obtained from group No. 3 in Table 1 of this example were mixed according to the weight parts in Table 2 to prepare a clear coating, and the obtained clear coating was a full high strength fast dry full acrylic solventless methyl methacrylate clear coating, so the first ingredient and the second ingredient must be compounded before use.
TABLE 2 composition ratio of the first ingredient to the second ingredient in each water-repellent paint composition
| Group number | First ingredient | The second ingredient |
| Coating 1 | 100 portions of | 1 part of |
| Paint 2 | 100 portions of | 0.8 portion of |
| Coating 3 | 100 portions of | 0.8 portion of |
| Coating 4 | 100 portions of | 0.9 portion |
| Paint 5 | 100 portions of | 0.9 part of |
The properties of the five coatings prepared in Table 2 were measured to obtain the data in Table 3.
TABLE 3 Properties of the respective groups of transparent waterproof coatings
| Group number | Actual drying time (min) | Transmittance/% | Tensile strength/MPa | VOC(g/L) | Impermeability (0.5MPa, 24h) |
| Coating 1 | 70 | 88 | 3 | 0 | Is impervious to water |
| Paint 2 | 65 | 85 | 4.5 | 0 | Is impervious to water |
| Coating 3 | 60 | 80 | 3.8 | 0 | Is impervious to water |
| Coating 4 | 75 | 83 | 3.3 | 0 | Is impervious to water |
| Paint 5 | 65 | 82 | 4.2 | 0 | Is impervious to water |
From table 3, it can be seen that the coatings 1 to 5 can achieve rapid drying, and are high in light transmittance, strong in tensile strength, and impermeable to water. Among them, the paint 1 had the shortest actual drying time and the highest light transmittance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The solvent-free methyl methacrylate resin is characterized by comprising the following components in parts by weight: 50-70 parts of methyl methacrylate polymer and 19-80 parts of acrylate compound;
the methyl methacrylate polymer is mainly polymerized by taking methyl methacrylate as a monomer and contains carbon-carbon unsaturated groups;
the preparation method of the methyl methacrylate polymer comprises the following steps:
s1, carrying out polymerization reaction on glycidyl methacrylate or glycidyl acrylate, methyl methacrylate and azobisisobutyronitrile at 40-60 ℃ for 0.5-1h to obtain a methyl methacrylate prepolymer containing epoxy side groups;
s2 introduces activated carbon unsaturated group
Adding 500-1000ppm of polymerization inhibitor and acrylic monomer into the methyl methacrylate prepolymer, and reacting at 100-120 ℃ for 1-3h to obtain the methyl methacrylate polymer.
2. A solventless methyl methacrylate resin according to claim 1 wherein: the methyl methacrylate polymer comprises the following structural formula:
3. a solventless methyl methacrylate resin as claimed in claim 1 wherein: the polymerization inhibitor is one or the combination of more than two of hydroquinone, p-benzoquinone, methyl hydroquinone, p-hydroxyanisole, 2-tert-butyl hydroquinone and 2,5-di-tert-butyl hydroquinone.
4. A solventless methyl methacrylate resin as claimed in claim 1 wherein: the acrylate compound is one or the combination of more than two of methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, docosanyl acrylate, tert-butyl acrylate, heptadecyl acrylate, isooctyl acrylate, isobornyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, docosanyl methacrylate, tert-butyl methacrylate, heptadecyl methacrylate, isooctyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate, ethylene glycol dimethacrylate, butanediol dimethacrylate, hexanediol diacrylate, allyl methacrylate, trimethylolpropane triacrylate, hexanediol dimethacrylate, tripropylene glycol diacrylate, pentaerythritol triacrylate, tris (2-hydroxyethyl) isocyanate triacrylate, pentaerythritol pentaacrylate/hexaacrylate, neopentyl glycol diethoxy diacrylate and propoxylated multifunctional acrylate.
5. A solventless methyl methacrylate resin according to claim 1 wherein: the Tg temperature of the solvent-free methyl methacrylate resin is 20-40 ℃.
6. Use of the solventless methyl methacrylate resin according to claim 1 in a transparent waterproof coating.
7. The use of the solventless methyl methacrylate resin in a transparent waterproof coating according to claim 6 wherein the transparent waterproof coating comprises a first formulation and a second formulation, the first formulation comprising the following components: solvent-free methyl methacrylate resin, an accelerator, a rheological aid and a light stabilizer; the second ingredient comprises the following components: benzoyl peroxide.
8. The use of the solventless methyl methacrylate resin in a transparent waterproof coating according to claim 7, wherein the first formulation comprises the following components in parts by weight: 60-80 parts of solvent-free methyl methacrylate resin, 3238 parts of accelerator 3238 zxft, 3262 parts of rheological additive 3262 zxft And 0.2-1 part of light stabilizer.
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