CN113416511A - Novel MS sealant for fabricated concrete and preparation method thereof - Google Patents
Novel MS sealant for fabricated concrete and preparation method thereof Download PDFInfo
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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
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Abstract
The invention discloses a novel MS sealant used for fabricated concrete and a preparation method thereof. According to the invention, through the hydrogen bond effect and the steric hindrance effect formed by the dispersing agent, the viscosity of the system is greatly reduced and the uniform arrangement property of the filler is improved, so that a more compact three-dimensional interpenetrating structure adhesive is formed, the cohesiveness and the storage stability of the MS sealant are improved, the particle problem of the MS sealant is solved, meanwhile, the thixotropic agent endows the MS sealant system with good thixotropy, the industry common fault that the extrudability becomes poor after storage is eliminated, and the MS sealant is easier to construct in the construction process.
Description
Technical Field
The invention relates to an MS sealant, in particular to a novel MS sealant used for fabricated concrete and a preparation method thereof.
Background
The structural joint refers to a joint which is arranged between two adjacent buildings or two parts of the buildings for avoiding temperature expansion and contraction, foundation settlement, earthquake collision and the like, and comprises joints such as construction joints, expansion joints, settlement joints, shockproof joints and the like. In order to prevent corrosion between the structural seams, a sealant needs to be poured between the structural seams.
The fabricated concrete structure sealant is a crosslinked polymer based on silane terminated polyether, and is a single-component or double-component elastic sealant which is mainly prepared by taking an MS polymer as a basic polymer and matching with a filler, a plasticizer and other functional auxiliaries, and is also called as an MS sealant. MS sealants crosslink or cure by continued exposure to moisture, primarily from the air or the bonded substrate itself.
At present, the MS resin viscosity of the main body of the MS sealant is high, the adding proportion and the dispersion uniformity of the calcium powder filling are limited, and then various performances of the sealant are limited, the high viscosity and the low extrusion rate can be caused by unilaterally increasing the proportion of the calcium powder filling, so that the construction efficiency is reduced, the bonding strength of the sealant is low, the storage period is short, and the like.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a novel MS sealant for fabricated concrete, which can effectively reduce the accumulation of high specific gravity solid particles and improve the uniformity of particle dispersion through a polymer polyamide dispersant and a polyamide thixotropic agent in a certain ratio, thereby improving the cohesiveness and storage stability of the sealant, and facilitating the application of glue during the construction process and having good shape retention.
The technical purpose of the invention is realized by the following technical scheme that the novel MS sealant used for the fabricated concrete comprises the following components in parts by weight:
in the invention, the dispersant is a high molecular weight polyamide dispersant selected from Guangzhou core new material science and technology limited, and comprises: the polyimide comprises a polyimide, a solvation chain and an anchoring group, wherein the polyimide is provided with two symmetrical hydroxyl groups, the solvation chain is a solvation chain with a carboxyl group, caprolactone or ethylene oxide, the hydroxyl groups on the polyimide are combined with the solvation chain with the carboxyl group, caprolactone or ethylene oxide, and the anchoring group is formed by grafting the polyimide on the solvation chain and then reacting with phosphate or anhydride.
The preparation method comprises the steps of mixing hydroxycarboxylic acid and polyvinylamine, obtaining polyimide with hydroxyl after reaction, taking the polyimide as a skeleton of a dispersant to be prepared, then grafting a solvation chain on the obtained polyimide, and mixing and reacting the grafted polymer with phosphate or anhydride to prepare the dispersant.
The dispersant is adsorbed on the surfaces of pigment and filler particles such as calcium powder and the like through an anchoring group carried by the dispersant, and a good steric hindrance effect is formed through a solvating chain segment, so that the system viscosity is greatly reduced, the particle uniformity and the dispersion uniformity of the pigment and filler are improved, and a more compact three-dimensional interpenetrating network structure adhesive can be formed, so that the dispersant is suitable for different solution systems, and the wettability and the adsorbability of the dispersant are improved.
The thixotropic agent is a polyamide thixotropic agent and is selected from Guangzhou core new material science and technology company, and the preparation steps comprise:
step (1): heating and mixing the carboxyl-containing component A, the amino-containing component B and the catalyst for a certain time, and vacuumizing to enable the carboxyl and the amino to react to generate polyamide; the component A is hydroxycarboxylic acid or a mixture of hydroxycarboxylic acid and alkyl carboxylic acid, specifically, the hydroxycarboxylic acid is ricinoleic acid or dodecahydroxy stearic acid, the alkyl carboxylic acid is lauric acid, the mixture of hydroxycarboxylic acid and alkyl carboxylic acid is a mixture of dodecahydroxy stearic acid and lauric acid, the catalyst is dibutyltin oxide or monobutyl tin oxide, and the structural formula of the component B is as follows: h- (NH-CH)2-CH2)n-NH2，n＝1-5；
Step (2): mixing the polyamide obtained in the step (alpha) with a polymer with an epoxy group or an isocyanate group, and heating to enable active hydrogen on the polyamide to react with the epoxy group or the isocyanate group, wherein the polymer with the epoxy group is polyethylene glycol diglycidyl ether with the average molecular weight of 500 or terminal single epoxy end-capped polybutyl acrylate with the average molecular weight of 1000; the polymer having isocyanate groups is: 3-isocyanatomethylene-3, 5, 5-trimethylcyclohexyl isocyanate, to ultimately prepare the modified polyamide structural rheology agent used in the present invention.
The modified polyamide structural rheological agent has wide applicable systems and has good compatibility in various systems such as low-polarity, medium-polarity and high-polarity systems; meanwhile, OH or urethane bonds are added on the molecular chain of the modified polyamide rheological agent, nitrogen or oxygen in the molecular chain and hydrogen in the polyamide rheological agent or other hydrocarbons form hydrogen bonds with a space network structure, the speed and the number of the hydrogen bonds formed in the system are increased, when the hydrogen bonds with the space network structure are damaged by shearing force, the viscosity is reduced, good construction performance is provided, and when the shearing force is removed, the hydrogen bonds are formed again, so that the modified polyamide rheological agent has good thixotropic, anti-settling and anti-sagging effects.
Further, the novel MS sealant used for the fabricated concrete comprises the following components in parts by weight:
in the invention, the dispersant is a polyamide dispersant with molecular weight more than 6000.
Further, the dispersant is at least one selected from the group consisting of DISUPER S35, DISUPER S9500 and DISUPER S9300, manufactured by Guangzhou core New Material science and technology Ltd.
In the invention, the thixotropic agent is a powdery polyamide thixotropic agent.
Further, the thixotropic agent is selected from Guangzhou core New Material science and technology, Inc., and is at least one of PAMID D680, PAMID D520 and PAMID D580.
In the invention, the calcium powder filler comprises heavy calcium carbonate and light calcium carbonate.
In the invention, the plasticizer is at least one of diisononyl phthalate and dioctyl phthalate.
In the invention, the coupling agent is an amino silane coupling agent, and the water removing agent is a vinyl silane water removing agent.
The invention also aims to provide a preparation method of the novel MS sealant used for the fabricated concrete, which comprises the following steps:
(1) calcium powder filler is dehydrated in a blast electric heating oven and then is uniformly mixed with pigment to be used as pigment filler;
(2) adding a plasticizer, a dispersing agent and a thixotropic agent into a dispersion cylinder of a planetary vacuum mixer, and adjusting a common rotating disc and a gear disc to perform dispersion stirring at 10-20 Hz;
(3) adding the pigment and filler after uniformly stirring, starting vacuum, adjusting the temperature of a co-rotating disc and a gear disc to be 30-40Hz, raising the temperature to 70-90 ℃, maintaining for 30-60min to ensure that the thixotropic agent is completely activated and dissolved, then continuously stirring and dispersing for 1-2h at the temperature of 110-130 ℃, controlling the humidity of the obtained viscous colloid to be less than 800PPM, and removing water in the material and activating the thixotropic agent;
(4) adjusting the revolution plate and the gear plate to 10-20Hz after heating, closing vacuum and heating, opening to cool the dispersion cylinder to room temperature, adding a water removing agent and silane modified resin into the dispersion cylinder, opening vacuum, dispersing for 40-60min at 10-20Hz, adding a coupling agent and the water removing agent, introducing nitrogen for protection, dispersing for 50-60min under vacuum, stirring and cooling to room temperature, and discharging by using an extruder.
The invention has the following beneficial effects:
1. according to the invention, a macromolecular polyamide dispersant is added into an MS sealing colloid system, and is adsorbed on the surfaces of pigment and filler particles such as calcium powder through an anchoring group carried by the macromolecular polyamide dispersant, and a good steric hindrance effect is formed through a solvating chain segment, so that the viscosity of the system is greatly reduced, the particle uniformity and the dispersion uniformity of the pigment and filler are improved, and thus, more proportions of pigment and filler can be added;
2. according to the invention, the polyamide thixotropic agent is added into the MS sealing colloid system, the completely melted and activated thixotropic agent can uniformly form a space network structure through the action of hydrogen bonds, and meanwhile, the fiber network structure is bridged again to endow colloid thixotropy, so that sagging of the high-density pigment filler sealant in the construction process is improved, good gluing property is ensured, and the shape retention is greatly improved;
3. the MS sealant prepared by the invention improves the dispersibility of pigment and filler particles by adding the macromolecular polyamide dispersant, so that more pigment and filler can be added, and the MS sealant has more excellent thermal aging fixed elongation retention time, wherein the fixed elongation retention time after thermal aging is 7d, which is longer than that of a commercially available product;
4. the MS sealant prepared by the invention has more excellent tensile bonding performance, and the tensile strength and the maximum tensile force of the MS sealant are higher than those of other MS sealants in the market.
Detailed Description
Example 1
25 parts of STP silane modified polyether resin, 5 parts of pigment, 45 parts of calcium powder filler, 0.6 part of dispersant, 0.6 part of thixotropic agent, 22.6 parts of plasticizer, 0.6 part of coupling agent and 0.6 part of water removal agent.
Wherein, the STP silane modified polyether resin is selected from Jiangsu Ruiyang new material science and technology limited company, and the product mark is 30000T.
Wherein, the pigment comprises carbon black and titanium dioxide.
Wherein the calcium powder filler is selected from Kelong powder Co Ltd in Guangxi Heng State, and comprises 800-mesh heavy calcium carbonate and 1300-mesh light calcium carbonate, and the proportion of the heavy calcium carbonate to the light calcium carbonate is as follows: 1:1.
Wherein the dispersant is a macromolecular polyamide dispersant selected from Guangzhou core new material science and technology limited company with the product brand of DISUPER S35 and the molecular weight of 6500.
The preparation method of the dispersant comprises the following steps:
step (1): mixing 536-656 g of ricinoleic acid, 130-160 g of triethylene tetramine and 18-22 g of dibutyltin oxide, and reacting to obtain polyimide; or 540-660 g of dodecahydroxystearic acid, 170-206 g of tetraethylenepentamine and 18-22 g of monobutyltin oxide are mixed and reacted to obtain polyimide;
step (2): mixing 126-154 g of polyimide, 270-330 g of caprolactone, 270-330 g of dodecahydroxy stearic acid and 18-22 g of diisobutyltin dilaurate to graft a solvation chain on the obtained polyimide; or firstly, mixing 126-154 g of polyimide and 450-550 g of carboxyl-terminated polymethyl methacrylate for reaction, and then adding 270-330 g of caprolactone and 18-22 g of diisobutyl tin dilaurate to graft the obtained polyimide with a solvation chain;
and (3): and mixing the grafted polymer with phosphate or acid anhydride for reaction to prepare the dispersant.
Wherein the thixotropic agent is a powdery polyamide thixotropic agent, is selected from Guangzhou core new material science and technology limited company, and has a product brand of PAMID D680.
The preparation method of the thixotropic agent comprises the following steps:
step (1): mixing the carboxyl-containing component A, the amino-containing component B and the catalyst at the temperature of 150-230 ℃ for 4-10 hours, and vacuumizing at the temperature of 180-230 ℃ for 1 hour after reaction to generate polyamide after the carboxyl and the amino react; wherein the molar ratio of the component A to the component B is 2: 1, the catalyst accounts for 1.4-1.7% of the mass of the component A and the component B, and active hydrogen is hydrogen on secondary amine in polyamide; the component A is hydroxycarboxylic acid or a mixture of hydroxycarboxylic acid and alkyl carboxylic acid, specifically, the hydroxycarboxylic acid is ricinoleic acid or dodecahydroxystearic acid, the alkyl carboxylic acid is lauric acid, the mixture of hydroxycarboxylic acid and alkyl carboxylic acid is a mixture of dodecahydroxystearic acid and lauric acid, and the ratio of the amount of dodecahydroxystearic acid to the amount of lauric acid in the mixture is 1:1, the catalyst is dibutyl tin oxide or monobutyl tin oxide, and the structural formula of the component B is as follows: h- (NH-CH)2-CH2)n-NH2，n＝1-5；
Step (2): mixing the polyamide obtained in the step (1) with a polymer with an epoxy group or an isocyanate group at 80-85 ℃, and reacting for 2-4 hours to ensure that active hydrogen on the polyamide reacts with the epoxy group or the isocyanate group, wherein the polymer with the epoxy group is polyethylene glycol diglycidyl ether with the average molecular weight of 500 or terminal monoepoxy-terminated polybutyl acrylate with the average molecular weight of 1000; the polymers bearing isocyanate groups are: 3-isocyanatomethylene-3, 5, 5-trimethylcyclohexyl isocyanate, and finally preparing the modified polyamide structural rheological agent.
Wherein the plasticizer is DINP diisononyl phthalate.
Wherein the coupling agent is an amino silane coupling agent selected from the German winning and creating industry group (Evonik Industries AG), and the product is Dynasylan DAMO.
The water scavenger is vinyl silane water scavenger selected from Momentive Performance Materials (SILQUEST A171).
The preparation method of the embodiment comprises the following steps:
(1) calcium powder filler is dehydrated for 24 hours in a blast electric heating oven at 120 ℃; then calcium powder filling material and pigment are mixed uniformly to be used as pigment filling material;
(2) adding a plasticizer, a dispersing agent and a thixotropic agent into a five-liter dispersion cylinder of a planetary vacuum stirrer, closing the dispersion cylinder and a stirring disc, and adjusting a common rotating disc and a gear disc to perform dispersion stirring at 15 Hz;
(3) adding a pigment and a filler after uniformly stirring, closing a dispersing agent, continuously and uniformly stirring, scraping off powder attached to a dispersion disc and a dispersion cylinder while the dispersing agent is still in the machine, fully mixing the powder, starting vacuum after the machine is closed, adjusting the temperature of a co-rotating disc and a gear disc to be 34Hz, raising the temperature to 70-90 ℃, maintaining for 30-60min, completely activating and dissolving a thixotropic agent, continuously stirring and dispersing for 1.5h at the temperature of 120 ℃, controlling the humidity of the obtained viscous colloid to be less than 800PPM, removing water in the material and activating the thixotropic agent;
(4) adjusting the revolution plate and the gear plate to 15Hz after heating, closing vacuum and heating, opening to cool the dispersion cylinder to room temperature, adding a water removing agent and silane modified resin into the dispersion cylinder, opening vacuum, dispersing for 50min at 15Hz, adding a coupling agent and the water removing agent, introducing nitrogen for protection, dispersing for 55min under vacuum, stirring, cooling to room temperature, and discharging by using an extruder.
Example 2
The present embodiment is different from embodiment 1 in that:
23 parts of STP silane modified polyether resin, 10 parts of pigment, 45 parts of calcium powder filler, 0.3 part of dispersing agent, 0.7 part of thixotropic agent, 20 parts of plasticizer, 0.5 part of coupling agent and 0.5 part of water removing agent.
The dispersant is a macromolecular polyamide dispersant selected from Guangzhou core new material science and technology limited company with the product brand of DISUPER S9500 and the molecular weight of 15000.
The thixotropic agent is a powdery polyamide thixotropic agent, is selected from Guangzhou core new material science and technology limited company, and has the product brand of PAMID D520.
The plasticizer is dioctyl phthalate.
The preparation method of the present example is different from that of example 1 in that: in the step (2), the common rotating disc and the gear disc are adjusted to be dispersed and stirred at 10 Hz; in the step (3), the common rotating disc and the gear disc are adjusted to be 30Hz, and then the stirring and the dispersion are continuously carried out for 1h at the temperature of 110 ℃; and (4) adjusting the revolution plate and the gear plate to 10Hz, starting vacuum, dispersing for 40min at 10Hz, adding the coupling agent and the water removing agent, introducing nitrogen for protection, and dispersing for 50min at vacuum.
Example 3
The present embodiment is different from embodiment 1 in that:
30 parts of STP silane modified polyether resin, 1 part of pigment, 50 parts of calcium powder filler, 1 part of dispersing agent, 1 part of thixotropic agent, 25 parts of plasticizer, 1 part of coupling agent and 1 part of water removal agent.
The dispersant is a macromolecular polyamide dispersant selected from Guangzhou core new material science and technology limited company with the product brand of DISUPER S9300 and the molecular weight of 16000.
The thixotropic agent is a powdery polyamide thixotropic agent, is selected from Guangzhou core new material science and technology limited company, and has the product brand of PAMID D580.
The preparation method of the present example is different from that of example 1 in that: in the step (2), the common rotating disc and the gear disc are adjusted to be dispersed and stirred at 20 Hz; in the step (3), the common rotating disc and the gear disc are adjusted to be 40Hz, and then the stirring and the dispersion are continuously carried out for 2 hours at the temperature of 130 ℃; and (4) adjusting the revolution plate and the gear plate to 20Hz, starting vacuum, dispersing for 60min at 20Hz, adding the coupling agent and the water removing agent, introducing nitrogen for protection, and dispersing for 60min at vacuum.
Example 4
The present embodiment is different from embodiment 1 in that:
30 parts of STP silane modified polyether resin, 10 parts of pigment, 35 parts of calcium powder filler, 0.2 part of dispersing agent, 0.2 part of thixotropic agent, 15 parts of plasticizer, 0.2 part of coupling agent and 0.2 part of water removing agent.
The MS sealant product prepared in example 1 was tested
1. And (3) testing the definite elongation adhesion:
compared with the fixed-elongation adhesion of common building assembly sealants and novel MS sealants in the market on different base materials, the test is carried out according to the standard of 'test method for building sealing materials No. 10: GB/T13477.10-2017 for fixed-elongation adhesion', the test principle is that the sealing materials to be tested are adhered between the surfaces of two parallel base materials to prepare a test piece, the test piece is stretched to a specified width, the stretching state is kept under the specified width, and the damage form of adhesion or cohesion of the sealing materials is recorded.
The test and record data comprise eight contents including test temperature, tensile speed, initial width, tensile elongation, fixed elongation retention time, failure depth and tensile result, the method A (standard test condition placement 28d) is selected for testing on two substrates of a cement substrate and an aluminum alloy substrate, and the specific test data and results are as follows:
TABLE 1
The data in table 1 show that the novel MS sealant prepared by the present invention meets the requirement of stretch adhesion on different substrates, and has performance close to that of the products on the market.
2. And (3) testing the definite elongation adhesion after soaking:
the influence of water immersion on the bonding/cohesion performance of the novel MS sealant in a fixed-elongation state is tested according to the standard of 'test method for building sealing materials No. 11: determination of fixed-elongation bonding property after water immersion GB/T13477.11-2017', the test principle is that the sealing material to be tested is bonded between the surfaces of two parallel base materials to prepare a test piece and a reference test piece, the test piece and the reference test piece are stretched to a specified width after being immersed in water under specified conditions, and the damage form of bonding or cohesion of the test piece is measured and recorded after the tensile state is maintained for a specified time.
The test and record data comprise eight contents of test temperature, tensile speed, initial width, tensile elongation, fixed elongation retention time, failure depth and tensile result, a method A (standard test condition placement 28d) is selected for testing on the cement base material, and the specific test data and results are as follows:
TABLE 2
The data in table 2 show that the novel MS sealant prepared by the present invention meets the requirement of definite elongation adhesion after soaking in water, and is close to the performance of the products on the market.
3. Test of definite elongation adhesion after 70 ℃ Heat aging
The novel MS sealant is tested for the fixed-elongation adhesion after thermal aging at 70 ℃, the thermal aging is carried out for 7d at 70 ℃, the test is in accordance with the standard of 'test method for building sealing material No. 10: GB/T13477.10-2017 for the fixed-elongation adhesion', and the test principle is consistent with the extension adhesion.
The method A (standard test condition placement 28d) is selected for testing and recording data, and the testing is carried out on the cement base material, and the specific test data and results are as follows:
TABLE 3
The data in table 3 illustrates that the novel MS sealants prepared in accordance with the present invention have a tack-free property after immersion in water that is close to that of the commercially available products.
4. Elastic recovery test
The elastic recovery rate of a sample sold on the market and the novel MS sealant is compared in a test, the test refers to the standard of ' test method for building sealing materials, part 17, namely GB/T13477.17-2017 ' for determining the fixed-elongation caking property ', and the test principle is that a test piece is stretched to a specified width, kept in a stretched state within a specified time and then released. The elastic recovery (expressed as a percentage of elongation) was calculated as the change in width of the test piece before and after stretching.
The method A (standard test condition placement 28d) is selected for testing and recording data, and the testing is carried out on the cement base material, and the specific test data and results are as follows:
TABLE 4
The data in table 4 illustrates that the novel MS sealants prepared in accordance with the present invention have elastic recovery rates close to those of the commercial products.
5. Tensile adhesion test
The tensile adhesion of the novel MS sealant is tested according to the standard of 'test method for building sealing material No. 8, namely GB/T13477.8-2017' for determining the tensile adhesion, and the test principle is that the sealing material to be tested is bonded between the surfaces of two parallel base materials to prepare a test piece. And (3) stretching the test piece to be damaged, drawing a force value-elongation value curve, and representing the tensile bonding performance of the sealing material by the calculated secant tensile modulus, maximum tensile strength and elongation at break.
The method A (standard test condition 28d) is selected for testing and recording data, the testing is carried out on the cement base material and the aluminum alloy base material, and the specific test data and results are as follows:
TABLE 5
The data in table 5 show that the novel MS sealant prepared by the present invention has better tensile adhesion properties and higher maximum tensile force and tensile strength than the commercial products.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is conceivable, and the examples presented herein demonstrate the results of applicants' actual experiments. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (10)
1. The novel MS sealant used for the fabricated concrete is characterized by comprising the following components in parts by weight:
2. the novel MS sealant for the fabricated concrete according to claim 1, which is characterized by comprising the following components in parts by weight:
3. the novel MS sealant for the fabricated concrete according to claim 1 or 2, wherein the dispersant is a polyamide dispersant with molecular weight of more than 6000.
4. The novel MS sealant for fabricated concrete according to claim 3, wherein the dispersant is selected from Guangzhou core New Material science and technology, Inc., and is at least one of DISUPER S35, DISUPER S9500 and DISUPER S9300.
5. The novel MS sealant for fabricated concrete according to claim 1, wherein the thixotropic agent is a powdered polyamide type thixotropic agent selected from the group consisting of PAMID D680, PAMID D520 and PAMID D580.
6. The novel MS sealant for fabricated concrete according to claim 1, wherein the STP silane-modified polyether resin is selected from New Material science and technology, Inc. of Ringsu Ruiyang, under the product designation 30000T.
7. The novel MS sealant for fabricated concrete according to claim 1, wherein the calcium powder filler comprises heavy calcium carbonate and light calcium carbonate.
8. The novel MS sealant for fabricated concrete according to claim 1, wherein the plasticizer is at least one of diisononyl phthalate and dioctyl phthalate.
9. The novel MS sealant for the fabricated concrete according to claim 1, wherein the coupling agent is an amino silane coupling agent, and the water scavenger is a vinyl silane water scavenger.
10. The preparation method of the novel MS sealant used for the fabricated concrete according to claim 1 is characterized by comprising the following steps:
(1) calcium powder filler is dehydrated in a blast electric heating oven and then is uniformly mixed with pigment to be used as pigment filler;
(2) adding a plasticizer, a dispersing agent and a thixotropic agent into a dispersion cylinder of a planetary vacuum mixer, and adjusting a common rotating disc and a gear disc to perform dispersion stirring at 10-20 Hz;
(3) adding the pigment and filler after uniformly stirring, starting vacuum, adjusting the temperature of a co-rotating disc and a gear disc to be 30-40Hz, raising the temperature to 70-90 ℃, maintaining for 30-60min to ensure that the thixotropic agent is completely activated and dissolved, then continuously stirring and dispersing for 1-2h at the temperature of 110-130 ℃, controlling the humidity of the obtained viscous colloid to be less than 800PPM, and removing water in the material and activating the thixotropic agent;
(4) adjusting the revolution plate and the gear plate to 10-20Hz after heating, closing vacuum and heating, opening to cool the dispersion cylinder to room temperature, adding a water removing agent and silane modified resin into the dispersion cylinder, opening vacuum, dispersing for 40-60min at 10-20Hz, adding a coupling agent and the water removing agent, introducing nitrogen for protection, dispersing for 50-60min under vacuum, stirring and cooling to room temperature, and discharging by using an extruder.
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| CN116254085A (en) * | 2023-02-15 | 2023-06-13 | 湖北回天新材料股份有限公司 | Weather-resistant MS door and window glue and preparation method thereof |
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| CN113416511B (en) | 2023-09-26 |
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