CN111454683B - High-water-resistance low-modulus single-component MS sealant, preparation method and application thereof - Google Patents
High-water-resistance low-modulus single-component MS sealant, preparation method and application thereof Download PDFInfo
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- CN111454683B CN111454683B CN202010381129.7A CN202010381129A CN111454683B CN 111454683 B CN111454683 B CN 111454683B CN 202010381129 A CN202010381129 A CN 202010381129A CN 111454683 B CN111454683 B CN 111454683B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The invention discloses a high-water-resistance low-modulus single-component MS sealant and a preparation method thereof, wherein the high-water-resistance low-modulus single-component MS sealant comprises the following components in parts by weight: 20-50 parts of basic MS resin; 20-50 parts of a plasticizer; 50-150 parts of an inorganic filler; 3-10 parts of a thixotropic agent; 2-8 parts of a weather resisting agent; 1-5 parts of a water-resistant adhesive; 0.05-1.0 part of catalyst; 0.5-3 parts of a color master batch special for MS sealant; the waterproof adhesive of the silane oligomer is added, so that the water resistance of the MS sealant can be improved, and the modulus of the MS sealant can be reduced. The MS sealant disclosed by the invention is excellent in adhesion with an assembled concrete member, low in modulus, high in water resistance, 100% cohesive failure of the MS sealant due to the fact that the MS sealant is broken after being soaked in water for 10 days and aged under the condition of no bottom coating, and no failure is caused in stretching adhesion after being soaked in water, so that the sealing and waterproof performance of an assembled building is remarkably improved, and the MS sealant can be widely applied to splicing seams of the assembled building.
Description
Technical Field
The invention belongs to the technical field of sealants, relates to a high-water-resistance low-modulus single-component MS sealant, and particularly relates to a high-water-resistance low-modulus single-component MS sealant, a preparation method and application thereof.
Background
The fabricated building has the advantages of energy saving, material saving, shortened construction period, environmental protection and the like, and the fabricated building is prevalent in the Japanese building industry in the 60 th century, so far, the fabricated building occupies the half-wall Jiangshan of the Japanese building market. The assembly type building adopts a factory-prefabricated field assembly mode, 2-3 cm wide assembly joints can be reserved in the assembly process, the assembly joints need to be filled with sealant with excellent performance, the traditional silicone sealant, polyurethane sealant and MS sealant are used for the assembly type building at present, and the traditional silicone sealant has high modulus and poor stain resistance; the polyurethane sealant has poor weather resistance and is easy to crack; the MS sealant has the advantages of both silicone sealant and polyurethane sealant, and has the advantages of good adhesion, weather resistance, flexibility, coating property and the like.
The MS polymer is a cross-linked polymer based on silane-terminated polyether, does not contain silicone components and solvents, does not contain polyurethane groups, is tasteless and environment-friendly in most formulas, has the inherent elasticity of MS adhesives and sealants, can absorb and compensate dynamic loads, uniformly transmits stress, prevents premature fatigue of materials, and can realize bonding among various base materials.
The domestic sealant for the assembly type building has no standard and no standard, and the construction quality is not guaranteed, so that the quality of the sealant for the assembly type building is uneven, even the silicone adhesive and the polyurethane sealant are taken as MS sealant, the problems of degumming, water leakage, poor displacement resistance and the like of a splicing seam occur, and a lot of obstacles are caused to the propulsion of the assembly type building. In practical application, whether silicone sealant, polyurethane sealant or MS sealant is used, the base layer treatment is still required to be carried out by corresponding primer, and the better sealing and waterproof effects can be achieved. The application experience of the sealant of the on-site assembly type building is based on Japan, two-component MS sealant is mostly adopted, on-site mixing stirring and vacuumizing defoaming are needed, but the problems of incomplete base layer treatment, uneven mixing, incomplete defoaming and the like often occur due to different qualities of on-site constructors, and the problems of incomplete quality, high modulus, poor water resistance, poor anti-displacement capacity, bubbling of the silicone adhesive and the polyurethane sealant and the like of the single-component MS sealant finally cause that the sealing and waterproof performance of the splicing seams is not enough, water leakage exists, and the service life of the assembly type building is even shortened. In order to solve the problems in the application process and adapt to Chinese type assembly type buildings, a low-modulus single-component MS sealant which has excellent water resistance, adhesion and matched base coat performance without a base coat is particularly needed.
Disclosure of Invention
Aiming at the technical defects existing in the field of applying the existing sealant to the assembly type building, the applicant invents a high-water-resistance low-modulus single-component MS sealant for the assembly type building through a series of research works, and the sealant is extremely suitable for being applied to the field of the Chinese assembly type building. The single-component MS sealant disclosed by the invention does not need to be mixed on site, is convenient to construct, is excellent in adhesion with an assembled concrete member, low in modulus and high in water resistance, is 100% cohesive failure of the MS sealant after being soaked in water for 10 days and aged, is free from damage after being soaked in water, is free from stretching adhesion, is remarkably improved in sealing and waterproof performance, and can be widely applied to assembly building splicing seams.
The first purpose of the invention is to provide a high-water-resistance low-modulus single-component MS sealant.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-water-resistance low-modulus single-component MS sealant comprises the following components in parts by weight:
20-50 parts of basic MS resin;
20-50 parts of a plasticizer;
50-150 parts of inorganic filler;
3-10 parts of a thixotropic agent;
2-8 parts of a weather resisting agent;
1-5 parts of a water-resistant adhesive;
0.05-1.0 part of catalyst;
0.5-3 parts of a special color master batch for MS sealant;
the waterproof adhesive comprises the following components in parts by mole:
1 part of trifunctional aminosilane coupling agent;
1 part of bifunctional aminosilane coupling agent;
1-3 parts of trifunctional epoxy silane coupling agent.
The waterproof adhesive is introduced into a basic MS resin, a plasticizer, an inorganic filler, a thixotropic agent and a weather-resistant agent system, and the proportion of each component is adjusted, so that the high-waterproof low-modulus single-component MS sealant suitable for the fabricated building is prepared. The waterproof adhesive is a silane oligomer composed of a trifunctional aminosilane coupling agent, a bifunctional aminosilane coupling agent and a trifunctional epoxy silane coupling agent, and not only can improve the water resistance of the MS sealant, but also can reduce the modulus of the MS sealant.
Preferably, the base MS resin is a hydrolysable silane-terminated polyether material.
Further, the number average molecular weight of the base MS resin was 10000-28000,
still further, the terminal group of the base MS resin is a hydrolyzable silyl group which is a trimethoxysilyl group or a methyldimethoxysilyl group having the structure:
preferably, the trifunctional aminosilane coupling agent is one or more of gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane and N-beta- (aminoethyl) -gamma-aminopropyltriethoxysilane.
Preferably, the bifunctional aminosilane coupling agent is one or more of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyldiethoxysilane, gamma-aminopropylmethyldimethoxysilane and gamma-aminopropylmethyldiethoxysilane.
Preferably, the trifunctional epoxysilane coupling agent is one or more of gamma-glycidoxypropyltrimethoxysilane, gamma-glycidoxypropyltriethoxysilane, beta- (3, 4-epoxycyclohexyl) -ethyltrimethoxysilane, beta- (3, 4-epoxycyclohexyl) -ethyltriethoxysilane, 3- (2, 3-epoxypropyl) propyltrimethoxysilane and gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane.
Preferably, the preparation method of the water-resistant adhesive comprises the following steps:
the molar ratio of the trifunctional aminosilane coupling agent to the bifunctional aminosilane coupling agent to the trifunctional epoxy silane coupling agent is 1:1: 1-1: 1:3, the raw materials are weighed according to the measurement, the trifunctional epoxy silane coupling agent is heated to 75-85 ℃, the bifunctional aminosilane coupling agent is gradually dripped within 30min, the trifunctional aminosilane coupling agent is gradually dripped within 30min, nitrogen is introduced at the temperature for reacting for 2-5 h, and the mixture is cooled and discharged.
Preferably, the plasticizer is one or more of cyclohexane-1, 2-dicarboxylic acid isononyl ester (DINCH), diisodecyl phthalate (DIDP), diisononyl phthalate (DINP), didecyl phthalate (DPHP).
Preferably, the inorganic filler is one or more of heavy calcium carbonate, light calcium carbonate, nano activated calcium carbonate, kaolin, silica micropowder, talcum powder and aluminum hydroxide.
Preferably, the thixotropic agent is one or more of polyamide wax, hydrogenated castor oil, fumed silica and organic bentonite.
Preferably, the weather-resistant agent is one or more of salicylate ultraviolet absorbers, benzophenone ultraviolet absorbers, benzotriazole ultraviolet absorbers, substituted acrylonitrile ultraviolet absorbers, triazine ultraviolet absorbers and hindered amine light stabilizers.
Preferably, the catalyst is one or more of dibutyltin dilaurate, dibutyltin diacetate, stannous octoate and dibutyltin bis (dodecyl sulfur).
Preferably, the special color master batch for the MS sealant consists of titanium dioxide, carbon black and diisodecyl phthalate (DIDP) according to the mass ratio of 2:1: 7.
The invention also aims to provide a preparation method of the high-water-resistance low-modulus single-component MS sealant, which comprises the following steps:
weighing raw materials according to the weight, carrying out vacuum drying on basic MS resin, a plasticizer, an inorganic filler, a thixotropic agent and a weather-resistant agent in a dynamic mixer at 110 ℃ for 2h, hermetically introducing cooling water to reduce the temperature to be below 50 ℃, adding a special color master batch for MS sealant, stirring for 15min, adding a waterproof adhesive, stirring for 30min, finally adding a catalyst, stirring for 10min, defoaming for 15min in vacuum, discharging, sealing and storing.
The third purpose of the invention is to provide the high-water-resistance low-modulus one-component MS sealant obtained by the preparation method and the application thereof in the field of fabricated buildings. The single-component MS sealant disclosed by the invention does not need to be mixed on site, is convenient to construct, is excellent in adhesion with an assembled concrete member, low in modulus and high in water resistance, is 100% cohesive failure of the MS sealant after being soaked in water for 10 days and aged, is free from damage after being soaked in water, is free from stretching adhesion, is remarkably improved in sealing and waterproof performance, and can be widely applied to assembly building splicing seams.
The invention has the following advantages and beneficial effects:
1. the invention provides a high-water-resistance low-modulus single-component MS sealant, which is remarkably improved in water-resistant adhesion with an assembled concrete member by introducing a water-resistant adhesive, still has excellent adhesion and sealing waterproof performance after being applied to an outdoor environment for a long time, is 100% cohesive failure of the MS sealant after being broken and adhered after being soaked in water for 10 days under the condition of no primer coating, is free from damage in stretching and adhering after being soaked in water, and is remarkably improved in sealing waterproof performance of an assembled building.
2. The high-water-resistance low-modulus single-component MS sealant disclosed by the invention is low in modulus, the modulus of definite elongation is less than or equal to 0.3MPa, and the sealant has excellent adhesion and displacement resistance to splicing seams with large deformation.
3. The high-water-resistance low-modulus single-component MS sealant is simple and convenient to construct, does not need to be mixed on site, can be directly unsealed and used, and avoids the problems of site construction management, complexity of matched mechanical equipment and the like caused by two components.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A high-water-resistance low-modulus single-component MS sealant comprises the following components in parts by weight:
base MS resin: molecular structure
The number average molecular weight is 10000, 50 parts;
plasticizer, cyclohexane-1, 2-dicarboxylic acid isononyl ester (DINCH), 50 parts;
150 parts of inorganic filler, heavy calcium carbonate and talcum powder;
10 parts of thixotropic agent, hydrogenated castor oil;
weather resistant agent, salicylate ultraviolet absorbent, benzophenone ultraviolet absorbent, 8 shares;
catalyst, stannous octoate, dibutyl tin dilauryl sulfide, 1 part;
the MS sealant special color master batch is composed of 3 parts of titanium dioxide, carbon black and diisodecyl phthalate (DIDP) according to the mass ratio of 2:1: 7;
5 parts of a water-resistant adhesive, wherein the water-resistant adhesive comprises the following components in parts by mole:
1 part of trifunctional aminosilane coupling agent, gamma-aminopropyltrimethoxysilane; 1 part of bifunctional aminosilane coupling agent N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane; 3 parts of trifunctional epoxy silane coupling agent, gamma-glycidyl ether oxypropyl trimethoxy silane; the preparation method comprises the steps of heating the epoxy silane coupling agent with the three-functionality degree to 75-85 ℃, gradually dripping the aminosilane coupling agent with the two-functionality degree within 30min, then gradually dripping the aminosilane coupling agent with the three-functionality degree within 30min, introducing nitrogen to react for 2-5 h at the temperature, cooling and discharging.
The preparation method of the high-water-resistance low-modulus single-component MS sealant comprises the following steps:
weighing raw materials according to the weight, carrying out vacuum drying on basic MS resin, a plasticizer, an inorganic filler, a thixotropic agent and a weather-resistant agent in a dynamic mixer at 110 ℃ for 2h, hermetically introducing cooling water to reduce the temperature to be below 50 ℃, adding a special color master batch for MS sealant, stirring for 15min, adding a waterproof adhesive, stirring for 30min, finally adding a catalyst, stirring for 10min, defoaming for 15min in vacuum, discharging, sealing and storing.
Example 2
A high-water-resistance low-modulus single-component MS sealant comprises the following components in parts by weight:
base MS resin: the molecular structure is as follows:
number average molecular weight is 10000-28000, 20 portions;
20 parts of plasticizer, diisodecyl phthalate (DIDP);
50 parts of inorganic filler, light calcium carbonate and silicon micropowder;
3 parts of thixotropic agent, fumed silica and organic bentonite;
2 parts of weather resisting agent, hindered amine light stabilizer;
catalyst, dibutyl tin diacetate, 0.05 part;
the MS sealant special color master batch consists of 0.5 part of titanium dioxide, carbon black and diisodecyl phthalate (DIDP) according to the mass ratio of 2:1: 7;
1 part of a water-resistant adhesive, wherein the water-resistant adhesive comprises the following components in parts by mole:
1 part of trifunctional aminosilane coupling agent, namely gamma-aminopropyltriethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane and N-beta- (aminoethyl) -gamma-aminopropyltriethoxysilane; 1 part of bifunctional aminosilane coupling agent, N-beta- (aminoethyl) -gamma-aminopropylmethyldiethoxysilane, gamma-aminopropylmethyldimethoxysilane and gamma-aminopropylmethyldiethoxysilane; 1 part of trifunctional epoxy silane coupling agent, beta- (3, 4-epoxycyclohexyl) -ethyltrimethoxysilane, beta- (3, 4-epoxycyclohexyl) -ethyltriethoxysilane, 3- (2, 3-epoxypropyl) propyltrimethoxysilane and gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane. The water-resistant adhesive was prepared in the same manner as in example 1.
The preparation method of the high-water-resistance low-modulus single-component MS sealant disclosed in the embodiment is the same as that in the embodiment 1.
Example 3
25 parts of basic MS resin;
25 parts of a plasticizer, diisononyl phthalate (DINP);
50 parts of inorganic filler, nano active calcium carbonate;
thixotropic agent, polyamide wax, 5 parts; 2 parts of weather resisting agent;
2 parts of a special color master batch for MS sealant;
2 parts of a water-resistant adhesive, the water-resistant binder of example 1;
catalyst, dibutyltin dilaurate, 0.5 part.
The preparation method of the high-water-resistance low-modulus single-component MS sealant disclosed in the embodiment is the same as that in the embodiment 1.
Example 4
25 parts of basic MS resin;
25 parts of a plasticizer, diisononyl phthalate (DINP);
50 parts of inorganic filler, nano active calcium carbonate;
thixotropic agent, polyamide wax, 5 parts;
2 parts of weather resisting agent;
2 parts of a special color master batch for MS sealant;
3.5 parts of a water-resistant adhesive, the water-resistant binder of example 2;
catalyst, dibutyltin dilaurate, 0.5 part.
The preparation method of the high-water-resistance low-modulus single-component MS sealant disclosed in the embodiment is the same as that in the embodiment 1.
Example 5
25 parts of basic MS resin;
25 parts of a plasticizer, diisodecyl phthalate (DIDP);
inorganic filler, 50 parts of nano active calcium carbonate and 20 parts of heavy calcium carbonate;
thixotropic agent, polyamide wax, 5 parts;
2 parts of weather resisting agent;
2 parts of a special color master batch for MS sealant;
2 parts of a water-resistant adhesive, the water-resistant binder of example 1;
catalyst, dibutyltin dilaurate, 0.5 part.
The preparation method of the high-water-resistance low-modulus single-component MS sealant disclosed in the embodiment is the same as that in the embodiment 1.
Example 6
25 parts of basic MS resin;
25 parts of a plasticizer, diisodecyl phthalate (DIDP);
inorganic filler, 50 parts of nano active calcium carbonate and 20 parts of silica micropowder;
thixotropic agent, polyamide wax, 5 parts; 2 parts of weather resisting agent;
2 parts of a special color master batch for MS sealant;
5 parts of a water-resistant adhesive, the water-resistant binder of example 1;
catalyst, dibutyltin dilaurate, 0.5 part.
Example 7 comparative example 1
25 parts of basic MS resin;
plasticizer, DINP, 25 parts;
50 parts of inorganic filler, nano active calcium carbonate;
5 parts of polyamide wax;
2 parts of weather resisting agent;
2 parts of a special color master batch for MS sealant;
2 parts of gamma-aminopropyltrimethoxysilane;
catalyst, dibutyltin dilaurate, 0.5 part.
Example 8 test comparison
The high water resistance and low modulus one-component MS sealant obtained in examples 3-6 and comparative example 1 in example 7 were tested and compared, and the performance test method or standard was as follows:
(1) tensile modulus test: the material is a concrete standard test block with the size of 75 × 25 × 2mm and the bonding area of 12mm × 50mm according to the test of the standard GB/T13477.8-2017, and is cured for 28 days under the standard condition of 23 + -2 ℃ and the relative humidity of 50 + -5%.
(2) And (3) testing the normal-temperature stretching adhesion: and (4) performing sample preparation test according to GB/T13477.10-2017, curing for 28d under standard conditions, and performing fixed extension for 100%.
(3) And (3) testing the fixed-stretching adhesion after soaking: and (4) performing sample preparation test according to GB/T13477.11-2017, maintaining for 28 days under standard conditions, soaking in water for 10 days, airing for 1d under standard conditions, and performing test.
(4) Testing the tensile adhesion after soaking: and (4) performing sample preparation test according to GB/T13477.8-2017, curing for 28d under standard conditions, stretching the test sample to damage, and recording the damage condition.
The performance test results are shown in table 1:
TABLE 1 MS sealant Performance test results
| MS sealGlue | Modulus at constant elongation of 100% | Stretch bonding | Fixed stretching bonding after soaking | Stretched and bonded after soaking in water |
| Example 1 | 0.20MPa | Without destruction | Without destruction | 100% cohesive failure |
| Example 2 | 0.25MPa | Without destruction | Without destruction | 100% cohesive failure |
| Example 3 | 0.25MPa | Without destruction | Without destruction | 100% cohesive failure |
| Example 4 | 0.23MPa | Without destruction | Without destruction | 100% cohesive failure |
| Example 5 | 0.23MPa | Without destruction | Without destruction | 100% cohesive failure |
| Example 6 | 0.27MPa | Without destruction | Without destruction | 100% cohesive failure |
| Example 7 | 0.38MPa | Without destruction | 100% interfacial failure | 100% interfacial failure |
The test piece is stretched to be damaged, the test piece is generally classified as bonding interface damage or cohesive damage according to the damage condition, the cohesive damage is damaged from the inside of the colloid, and the bonding force of the MS sealant to the concrete is good; this is an interfacial failure, i.e., the glue breaks at the interface of the MS sealant and the concrete, which indicates poor adhesion of the MS sealant to the concrete.
From the test results, the addition of the waterproof adhesive can ensure that the MS sealant and concrete are excellent in adhesion, low in modulus and high in water resistance, the MS sealant is 100% cohesive failure after being soaked in water for 10 days and aged under the condition of no bottom coating, and the MS sealant is free of damage after being soaked in water and stretched, so that the MS sealant is very suitable for being applied to the field of assembly type buildings.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The high-water-resistance low-modulus single-component MS sealant is characterized in that: the paint comprises the following components in parts by weight:
20-50 parts of basic MS resin;
20-50 parts of a plasticizer;
50-150 parts of inorganic filler;
3-10 parts of a thixotropic agent;
2-8 parts of a weather resisting agent;
1-5 parts of a water-resistant adhesive;
0.05-1.0 part of catalyst;
0.5-3 parts of a special color master batch for MS sealant;
the waterproof adhesive comprises the following components in parts by mole:
1 part of trifunctional aminosilane coupling agent;
1 part of bifunctional aminosilane coupling agent;
1-3 parts of trifunctional epoxy silane coupling agent;
wherein: the preparation method of the waterproof adhesive comprises the following steps:
weighing raw materials according to a certain amount, heating the epoxy silane coupling agent with three functionality degrees to 75-85 ℃, gradually dripping the aminosilane coupling agent with two functionality degrees within 30min, then gradually dripping the aminosilane coupling agent with three functionality degrees within 30min, introducing nitrogen to react for 2-5 h at the temperature, cooling and discharging.
2. The high water resistant, low modulus one component MS sealant of claim 1 wherein: the basic MS resin is a hydrolyzable silane-terminated polyether material, the number average molecular weight of the basic MS resin is 10000-28000, and the structure is as follows:
3. the high water resistant, low modulus one-component MS sealant as claimed in claim 1, wherein: the trifunctional aminosilane coupling agent is one or more of gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane and N-beta- (aminoethyl) -gamma-aminopropyltriethoxysilane; the bifunctional aminosilane coupling agent is one or more of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyldiethoxysilane, gamma-aminopropylmethyldimethoxysilane and gamma-aminopropylmethyldiethoxysilane; the trifunctional epoxy silane coupling agent is one or more of gamma-glycidoxypropyltrimethoxysilane, gamma-glycidoxypropyltriethoxysilane, beta- (3, 4-epoxycyclohexyl) -ethyltrimethoxysilane and beta- (3, 4-epoxycyclohexyl) -ethyltriethoxysilane.
4. The high water resistant, low modulus one component MS sealant of claim 1 wherein: the plasticizer is one or more of cyclohexane-1, 2-diisononyl phthalate, diisodecyl phthalate, diisononyl phthalate and didecyl phthalate; the inorganic filler is one or more of heavy calcium carbonate, light calcium carbonate, nano active calcium carbonate, kaolin, silicon micropowder, talcum powder and aluminum hydroxide.
5. The high water resistant, low modulus one component MS sealant of claim 1 wherein: the thixotropic agent is one or more of polyamide wax, hydrogenated castor oil, fumed silica and organic bentonite; the weather-resistant agent is one or more of salicylate ultraviolet absorbent, benzophenone ultraviolet absorbent, benzotriazole ultraviolet absorbent, substituted acrylonitrile ultraviolet absorbent, triazine ultraviolet absorbent and hindered amine light stabilizer.
6. The high water resistant, low modulus one component MS sealant of claim 1 wherein: the catalyst is one or more of dibutyltin dilaurate, dibutyltin diacetate, stannous octoate and dibutyltin didodecyl sulfide.
7. The high water resistant, low modulus one component MS sealant of claim 1 wherein: the special color master batch for the MS sealant consists of titanium dioxide, carbon black and diisodecyl phthalate in a mass ratio of 2:1: 7.
8. The preparation method of the high-water-resistance low-modulus single-component MS sealant as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps:
weighing raw materials according to the weight, carrying out vacuum drying on basic MS resin, a plasticizer, an inorganic filler, a thixotropic agent and a weather-resistant agent in a dynamic mixer at 110 ℃ for 2h, hermetically introducing cooling water to reduce the temperature to be below 50 ℃, adding a special color master batch for MS sealant, stirring for 15min, adding a waterproof adhesive, stirring for 30min, finally adding a catalyst, stirring for 10min, defoaming for 15min in vacuum, discharging, sealing and storing.
9. The application of the high-water-resistance low-modulus one-component MS sealant obtained by the preparation method according to the claim 8 in the field of fabricated buildings.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010381129.7A CN111454683B (en) | 2020-05-08 | 2020-05-08 | High-water-resistance low-modulus single-component MS sealant, preparation method and application thereof |
| JP2021078954A JP7169698B2 (en) | 2020-05-08 | 2021-05-07 | One-component MS sealant with high water resistance and low modulus, manufacturing method and its application |
Applications Claiming Priority (1)
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| CN112646527A (en) * | 2020-12-16 | 2021-04-13 | 大禹伟业(北京)国际科技有限公司 | Low-modulus sealant and preparation method and application thereof |
| CN114276742A (en) * | 2021-12-24 | 2022-04-05 | 四川省威盾匠心建设有限公司 | Novel high-adhesion, high-thixotropy and environment-friendly silane modified polymer waterproof paint and preparation method thereof |
| CN114276769A (en) * | 2022-01-21 | 2022-04-05 | 郑州圣莱特空心微珠新材料有限公司 | Silane modified polyether sealant, preparation method thereof and application thereof in fabricated building |
| CN115851204A (en) * | 2022-03-24 | 2023-03-28 | 安徽牛元新材料有限公司 | External mildew-proof adhesive for building construction and preparation method thereof |
| CN115123456B (en) * | 2022-07-12 | 2024-04-05 | 广东凯力船艇股份有限公司 | Installation method of underwater sightseeing window |
| CN116622318B (en) * | 2023-07-25 | 2023-09-12 | 山东凯恩新材料科技有限公司 | Preparation method of low-shrinkage ether-based epoxy sealant |
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