CN112521867A - Low-modulus high-elasticity two-component silane modified polyether sealant and preparation method thereof - Google Patents
Low-modulus high-elasticity two-component silane modified polyether sealant 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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/182—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds
- C01F11/183—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds the additive being an organic compound
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/185—After-treatment, e.g. grinding, purification, conversion of crystal morphology
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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
Abstract
The invention discloses a low-modulus high-elasticity two-component silane modified polyether sealant and a preparation method thereof, wherein the low-modulus high-elasticity two-component silane modified polyether sealant is prepared from the following components in parts by weight of 10:1, mixing the component A and the component B; the component A comprises the following raw materials in parts by mass: 25-40 parts of silane modified polyether, 10-30 parts of plasticizer, 40-60 parts of nano calcium carbonate, 1-3 parts of fumed silica and 0.5-3 parts of light-cured resin; the component B comprises the following raw materials in parts by mass: 40-60 parts of nano calcium carbonate, 20-40 parts of plasticizer, 0.5-10 parts of catalyst, 0.5-2 parts of accelerator and 0.5-1.5 parts of coupling agent; the light-cured resin is trimethylolpropane triacrylate; the accelerant is laurylamine. The polyether sealant prepared by reasonably matching the raw materials has the advantages of low modulus and extremely high elastic recovery rate, and the curing surface drying rate is controllable and the defect of oil bleeding is overcome; and the formula is simple, the cost is lower, the preparation process is simple, and the industrial production is easy to realize.
Description
Technical Field
The invention belongs to the technical field of sealants, and particularly relates to a low-modulus high-elasticity two-component silane modified polyether sealant and a preparation method thereof.
Background
In the field of construction, an assembly type building as an environment-friendly and energy-saving type building gradually becomes an important development direction of the construction industry in China. Because the joint part of the fabricated building is exposed in the air for a long time, the waterproof sealant has frequent expansion and contraction due to cold and heat changes of the weather and larger displacement deformation, and after long-term telescopic deformation, the waterproof sealant can be broken or lose the waterproof sealing effect due to excessive looseness. Therefore, the waterproof sealant for the fabricated building needs to have excellent anti-stretching deformation capability, namely low modulus and high elastic recovery rate (tensile modulus is less than 0.4Mpa, elastic recovery rate is more than 80%), and simultaneously has good coating property, weather resistance, environmental protection property and the like. The silane modified polyether sealant is widely favored by the market due to excellent substrate cohesiveness, good stretch deformation resistance, environmental friendliness and low pollution, and is particularly suitable for the field of fabricated buildings.
Silane modified polyether sealants have had a history of over 40 years of development since the first development in japan in the 70 th 20 th century. Because of the excellent comprehensive performance, the silane modified polyether sealant becomes the most main sealant in Japan, occupies a large market share in Europe and America, and is not widely applied in China. The silicone sealant has the advantages of wide application, good reinforcing bonding effect, good weather resistance and the like, but has the defects of poor surface decoration, easy generation of oily dialysis pollutants and the like. The polyurethane sealant has high bonding strength, good elastic recovery rate and poor weather resistance, and the isocyanate group contained in the polyurethane has high toxicity. The silane modified polyether sealant has the advantages of both silicone adhesive and polyurethane adhesive, is nontoxic and tasteless, and is more and more favored in the Chinese market.
The single-component silane modified polyether sealant product has the advantages of simple and convenient use, high energy consumption, complex process and poor storage stability, and needs high-temperature dehydration during production. The curing of the bicomponent silane modified polyether sealant does not need external moisture, heating and dewatering are not needed during production, the process is simple, the storage stability of the finished product sealant is good, and the mechanical property is excellent and adjustable. In the application of the assembly type building construction, compared with a single-component sealant, the two-component silane modified polyether sealant has obvious advantages.
The patent CN 108676506A discloses a two-component modified polyether sealant and a preparation method thereof, the sealant has good mechanical properties, meets the requirements of the sealant for an assembly type building, and can be completely cured within 24 hours. However, the component A of the sealant contains more heavy calcium, so that the thixotropy is poor, more thixotropic agent needs to be added, the addition of the thixotropic agent can obviously increase the modulus of the sealant, the elongation is reduced, and the thixotropic agent can also reduce the stability of the component A. In addition, the preparation process of the sealant A component needs to be heated to 60-80 ℃ for dehydration, the process is complex, and the benefit is not high.
The patent CN 109401710A discloses a two-component silane modified polyether sealant and a preparation method thereof, the two-component sealant is characterized in that a small amount of water is added into the component A to achieve the effect of rapid curing, and the temperature is increased to 105-115 ℃ for water removal in the preparation process of the component B, so that the process is complex, the energy consumption is high, and the requirement on production equipment is higher. And the deep curing of the sealant is too fast, only 3-5min, and the operable time is too short.
Patent CN 105219337A discloses a two-component silane modified polyether sealing material and a preparation method thereof, and the patent reduces the using amount of an organic tin catalyst by adding a titanium catalyst to replace part of the organic tin catalyst, reduces the harm brought by the organic tin, is fast in curing and has good construction property. Patent CN 109628046A discloses a two-component silane modified polyether sealant with controllable curing speed, which is characterized in that vinyl trimethoxy silane, an amino coupling agent and chelated tin are added into component A, and an accelerant is added into component B to realize rapid deep curing, so that the shear strength can reach 1.5MPa within 4h, and the shear strength can reach 2.3MPa within 24 h. The two-component silane modified polyether sealant has high strength and high modulus, and does not meet the requirement of equipment type buildings on low-modulus sealants.
The patent CN 110373144A discloses a two-component low-modulus high-resilience silane modified polyether sealant and a preparation method thereof, the sealant has lower modulus, larger elongation and good weather resistance by adding nano calcium carbonate and self-made modified coarse whiting, but the adhesive force of the sealant is reduced easily due to excessive addition of the modified coarse whiting, the curing rate of the sealant is slow, and the 24-hour deep curing of the sealant is only 3-5 mm.
Therefore, how to develop the low-modulus and high-elasticity bicomponent silane modified polyether sealant has important significance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a low-modulus high-elasticity two-component silane modified polyether sealant and a preparation method thereof. The sealant provided by the invention has the advantages of low modulus and high elastic recovery rate through reasonable proportioning, and the curing surface drying rate is controllable, and the defect of oil bleeding can be overcome.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a low-modulus high-elasticity two-component silane modified polyether sealant is prepared from the following components in parts by weight of 10:1, mixing the component A and the component B; the component A comprises the following raw materials in parts by mass: 25-40 parts of silane modified polyether, 10-30 parts of plasticizer, 40-60 parts of nano calcium carbonate, 1-3 parts of fumed silica and 0.5-3 parts of light-cured resin; the component B comprises the following raw materials in parts by mass: 40-60 parts of nano calcium carbonate, 20-40 parts of plasticizer, 0.5-10 parts of catalyst, 0.5-2 parts of accelerator and 0.5-1.5 parts of coupling agent; the light-cured resin is trimethylolpropane triacrylate; the accelerant is laurylamine; the silane modified polyether is SAX510 or/and SAX 520; or SAX510 or/and SAX520 in combination with one or more of S810, S203H and S303H.
The trimethylolpropane triacrylate light-cured resin used in the invention can promote the curing rate of the sealant and solve the problem of overlong tack-free time of the sealant.
Preferably, the silane modified polyether is SAX510 or SAX520 of KANEKA corporation in combination with one or more of SAX510, SAX520, S810, S203H and S303H.
Preferably, the silane-modified polyether consists of SAX510 and SAX520 in a mass ratio of 1-4: 1.
Preferably, the plasticizer comprises one or more combinations of diisodecyl phthalate (DIDP), diisononyl phthalate (DINP), polyether polyol N220, and polyether polyol N330. The plasticizer used can achieve the purposes of reducing viscosity, improving processability and improving flexibility.
Preferably, the coupling agent comprises one or more combinations of N- (β -aminoethyl) - γ -aminopropyltrimethoxysilane (KH 792), γ -aminopropyltrimethoxysilane (KH 540), γ -aminopropyltriethoxysilane (KH 550) and γ - (2, 3-glycidoxy) propyltrimethoxysilane (KH 560). The inventor researches and discovers that the addition of a quantitative coupling agent can promote the surface drying time of the sealant and improve the strength and the elastic recovery rate of the sealant, but the addition of the coupling agent can increase the modulus of the sealant and reduce the elongation, so that the addition of too much coupling agent in the low-modulus two-component silane modified polyether sealant is not suitable.
Preferably, the catalyst is one or more of stannous isooctanoate, dibutyltin dilaurate, dibutyltin diacetate and dibutyltin bis (acetylacetonate). The invention discovers that although stannous isooctanoate can enable the two-component silane modified polyether sealant to have good elastic recovery rate by matching with the laurylamine promoter, the catalytic system has slower surface drying and curing rate and is accompanied with oil precipitation phenomenon, thus influencing the use of the sealant. Therefore, the sealant can not have the problems only by reasonably matching the catalyst and the laurylamine promoter.
Preferably, the nano calcium carbonate is self-made calcium carbonate, the shape of the nano calcium carbonate is regular cube, and the specific surface area of the nano calcium carbonate is 8-15m2(ii) in terms of/g. The modified silicone oil has good dispersibility, low oil absorption value and good compatibility with silane modified polyether sealant, can endow the sealant with good thixotropy and dehydration property after being filled, reduces the use of thixotropic agent, reduces the cost, and solves the problem that the storage time of the component A is short due to the addition of too much thixotropic agentAnd poor stability.
Preferably, the preparation method of the nano calcium carbonate is as follows:
s1, adding a surface inhibitor consisting of nonpolar alcohols and fatty alcohol-polyoxyethylene ether into lime milk with the specific gravity of 1.045-1.065, wherein the addition amount of the surface inhibitor is 1.0-2.0% of the mass of the lime milk, fully and uniformly stirring, adding the lime milk with the same specific gravity through carbon dioxide mixed gas, the addition amount of the lime milk is 10-15% of the mass of the original lime milk, stopping ventilation when the pH of a reaction system is 7.0, and finishing carbonation reaction to obtain a precipitated calcium carbonate suspension;
s2, performing surface treatment on the precipitated calcium carbonate suspension by stearic acid, wherein the usage amount of the stearic acid is 2-4% of the dry basis weight of the calcium carbonate, and performing filter pressing, drying and sieving to obtain the nano calcium carbonate.
Preferably, the fumed silica is 150-200m2A/g hydrophobic fumed silica. The fumed silica can be used as a reinforcing filler and a thixotropic agent, namely, the fumed silica is added into the sealant to quickly form a silica structure, and the fumed silica particles form a network structure to inhibit colloid flow and improve the bonding effect. In addition, the inventor researches and discovers that the addition of the fumed silica can effectively improve the elastic recovery rate, but the surface dry curing time of the sealant can be prolonged, and the phenomenon that the addition is more obvious, the dosage requirement on the catalyst is also larger, and the economic benefit is influenced. According to the invention, the deep curing balance of the sealant is realized by reasonably matching the usage amount of the fumed silica and the catalyst, and the elastic recovery rate is optimal.
The invention also provides a preparation method of the low-modulus high-elasticity two-component silane modified polyether sealant, which comprises the following steps:
adding silane modified polyether, plasticizer, nano calcium carbonate, fumed silica and light-cured resin into a planetary stirrer, stirring at high speed for 60min under the vacuum degree of-0.095 MPa, and cooling to below 50 ℃ to obtain a component A; adding the plasticizer and the nano calcium carbonate into another planetary stirrer, stirring at a high speed for 30min under the vacuum degree of-0.095 MPa, cooling to below 50 ℃, adding the catalyst, the catalyst accelerator and the coupling agent, and stirring at a medium speed for 15min under the vacuum degree of-0.095 MPa to obtain a component B; and uniformly mixing the component A and the component B according to the mass ratio of 10:1 to obtain the sealant.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. the polyether sealant prepared by reasonably matching the raw materials has the advantages of low modulus and extremely high elastic recovery rate, and the curing surface drying rate is controllable and the defect of oil bleeding is overcome; and the formula is simple, the cost is lower, the preparation process is simple, and the industrial production is easy to realize.
2. The sealant adopts self-made nano calcium carbonate, the appearance of the sealant is regular cube, and the specific surface area of the sealant is 8-15m2The adhesive has good dispersibility and low oil absorption value, can endow the sealant with good thixotropy and dehydration performance, reduces the use of a thixotropic agent, reduces the cost, and solves the problems of short storage time and poor stability of the component A caused by adding too much thixotropic agent.
Drawings
FIG. 1 is a scanning electron micrograph (10 ten thousand times) of nano calcium carbonate used in the examples of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
The preparation of the nano calcium carbonate used in the embodiment of the invention is as follows:
s1, adding a surface inhibitor consisting of absolute ethyl alcohol and peregal O-20 in a mass ratio of 4:1 into lime milk, wherein the surface inhibitor is added in an amount of 1.8% of the mass of the lime milk, fully and uniformly stirring, and passing through a mixed gas with a carbon dioxide content of 30% and an inlet flow of 2.0m3H, controlling the temperature to be 25 ℃ and the stirring speed to be 120 r/min; simultaneously adding lime milk with the same specific gravity, wherein the adding amount of the lime milk is 13 percent of the mass of the original lime milk, and the pH value of the reaction system is adjustedStopping aeration when the concentration is 7.0, and finishing the carbonation reaction to obtain a precipitated calcium carbonate suspension;
s2, heating the precipitated calcium carbonate suspension to 65 ℃, adding stearic acid with the calcium carbonate dry basis mass of 3.0%, performing surface treatment for 20min at the rotating speed of 500r/min, performing filter pressing according to a conventional method, drying, and sieving to obtain the calcium carbonate suspension with the specific surface area of 12.5m2Per gram of nano calcium carbonate.
Example 1
A low-modulus high-elasticity two-component silane modified polyether sealant is prepared from the following components in parts by weight of 10:1, mixing the component A and the component B; the component A comprises the following raw materials in parts by mass: 30 parts of SAX510 silane modified polyether, 20 parts of diisodecyl phthalate (DIDP) plasticizer, 50 parts of nano calcium carbonate, 2 parts of fumed silica and 1.5 parts of trimethylolpropane triacrylate photocuring resin; the component B comprises the following raw materials in parts by mass: 47 parts of nano calcium carbonate, 32 parts of diisodecyl phthalate (DIDP) plasticizer, 1.5 parts of dibutyltin dilaurate catalyst, 0.5 part of laurylamine accelerator and 1.0 part of KH550 coupling agent.
Example 2
A low-modulus high-elasticity two-component silane modified polyether sealant is prepared from the following components in parts by weight of 10:1, mixing the component A and the component B; the component A comprises the following raw materials in parts by mass: 20 parts of SAX510 silane modified polyether, 15 parts of SAX520 silane modified polyether, 15 parts of diisodecyl phthalate (DIDP) plasticizer, 47 parts of nano calcium carbonate, 2 parts of fumed silica and 1.5 parts of trimethylolpropane triacrylate photocuring resin; the component B comprises the following raw materials in parts by mass: 50 parts of nano calcium carbonate, 32 parts of diisodecyl phthalate (DIDP) plasticizer, 1.5 parts of dibutyltin dilaurate catalyst, 0.5 part of laurylamine accelerator and 1.0 part of KH550 coupling agent.
Example 3
A low-modulus high-elasticity two-component silane modified polyether sealant is prepared from the following components in parts by weight of 10:1, mixing the component A and the component B; the component A comprises the following raw materials in parts by mass: silane modified polyether SAX 52020 parts, silane modified polyether S203H 5 parts, silane modified polyether S303H 5 parts, diisodecyl phthalate (DIDP) plasticizer 20 parts, nano calcium carbonate 47 parts, fumed silica 2 parts, trimethylolpropane triacrylate light-cured resin 1.5 parts; the component B comprises the following raw materials in parts by mass: 50 parts of nano calcium carbonate, 32 parts of diisodecyl phthalate (DIDP) plasticizer, 1.5 parts of dibutyltin dilaurate catalyst, 0.5 part of laurylamine accelerator and 1.0 part of KH550 coupling agent.
Example 4
A low-modulus high-elasticity two-component silane modified polyether sealant is prepared from the following components in parts by weight of 10:1, mixing the component A and the component B; the component A comprises the following raw materials in parts by mass: silane modified polyether SAX 52020 parts, S81010 parts, diisodecyl phthalate (DIDP) plasticizer 20 parts, nano calcium carbonate 50 parts, fumed silica 2 parts, trimethylolpropane triacrylate photocuring resin 1.5 parts; the component B comprises the following raw materials in parts by mass: 47 parts of nano calcium carbonate, 32 parts of diisodecyl phthalate (DIDP) plasticizer, 1.5 parts of dibutyltin dilaurate catalyst, 0.5 part of laurylamine accelerator and 1.0 part of KH550 coupling agent.
Example 5
A low-modulus high-elasticity two-component silane modified polyether sealant is prepared from the following components in parts by weight of 10:1, mixing the component A and the component B; the component A comprises the following raw materials in parts by mass: 20 parts of SAX510 silane modified polyether, 15 parts of diisodecyl phthalate (DIDP) plasticizer, 47 parts of nano calcium carbonate, 2 parts of fumed silica and 1.5 parts of trimethylolpropane triacrylate photocuring resin; the component B comprises the following raw materials in parts by mass: 50 parts of nano calcium carbonate, 32 parts of diisodecyl phthalate (DIDP) plasticizer, 8 parts of stannous isooctanoate catalyst, 1 part of laurylamine accelerator, 1.0 part of N- (beta-aminoethyl) -gamma-aminopropyltrimethoxysilane (KH 792) and 1.0 part of 3-aminopropyltrimethoxysilane (KH 540).
Example 6
A low-modulus high-elasticity two-component silane modified polyether sealant is prepared from the following components in parts by weight of 10:1, mixing the component A and the component B; the component A comprises the following raw materials in parts by mass: 25 parts of SAX510 silane modified polyether, 17 parts of diisodecyl phthalate (DIDP) plasticizer, 50 parts of nano calcium carbonate, 2 parts of fumed silica and 1.5 parts of trimethylolpropane triacrylate photocuring resin; the component B comprises the following raw materials in parts by mass: 55 parts of nano calcium carbonate, 32 parts of diisodecyl phthalate (DIDP) plasticizer, 1.5 parts of dibutyltin dilaurate catalyst, 0.5 part of laurylamine accelerator and 1.0 part of KH550 coupling agent.
Comparative example 1
The amounts of the self-made nano calcium carbonate and the fumed silica of the component A are respectively changed to 35 parts and 5 parts as in the example 2.
Comparative example 2
The self-made nano calcium carbonate of the component A is changed into the nano calcium carbonate with the specific surface area of 25m in the same way as in the example 12Per gram of commercially available activated nano calcium carbonate.
Comparative example 3
The silane-modified polyether SAX 51030 parts of the component A are changed into silane-modified polyether S203H 15 parts and silane-modified polyether S303H 15 parts, which are the same as the component A in example 1.
Comparative example 4
In the same manner as in comparative example 3, 1.5 parts of dibutyltin dilaurate as the component B was changed to 12 parts of stannous isooctanoate and 1.5 parts of laurylamine.
Comparative example 5
In the same manner as in example 5, 1 part of N- (. beta. -aminoethyl) -gamma-aminopropyltrimethoxysilane (KH 792) and 1 part of 3-aminopropyltrimethoxysilane (KH 540) were changed to 3 parts and 2 parts, respectively.
The preparation method of the silane modified polyether sealant in the embodiment and the comparative example comprises the following steps:
adding silane modified polyether, plasticizer, nano calcium carbonate, fumed silica and light-cured resin into a planetary stirrer, stirring at high speed for 60min under the vacuum degree of-0.095 MPa, and cooling to below 50 ℃ to obtain a component A; adding the plasticizer and the nano calcium carbonate into another planetary stirrer, stirring at a high speed for 30min under the vacuum degree of-0.095 MPa, cooling to below 50 ℃, adding the catalyst, the catalyst accelerator and the coupling agent, and stirring at a medium speed for 15min under the vacuum degree of-0.095 MPa to obtain a component B; and uniformly mixing the component A and the component B according to the mass ratio of 10:1 to obtain the sealant.
The polyether sealants prepared in examples 1 to 6 of the present invention and comparative examples 1 to 5 were measured for various properties according to the following methods, and the test results are shown in table 1. Wherein the 100% tensile strength and the elongation at break are tested according to GB/T528-2009 standard, the elastic recovery rate, the surface drying time and the curing depth of 24h are tested according to GB/T13477.17-2017.
Table 1: performance test results for the polyether sealant of the invention
The result shows that the modulus of the low-modulus high-elasticity bicomponent silane modified polyether sealant prepared by the invention meets the standard requirement that the tensile modulus is less than 0.4MPa, and the elastic recovery rate is more than 80 percent; compared with a comparative example, the low-modulus high-elasticity bicomponent silane modified polyether sealant prepared by the invention has low modulus and high elasticity, can be completely cured within 4 hours, has high curing speed, greatly improves the production efficiency, does not generate oil in the using process, and completely meets the requirement of the waterproof field of equipment type buildings on the low-modulus sealant.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and such substitutions and modifications are to be considered as within the scope of the invention.
Claims (9)
1. A low-modulus high-elasticity two-component silane modified polyether sealant is characterized in that: the weight ratio of 10:1, mixing the component A and the component B; the component A comprises the following raw materials in parts by mass: 25-40 parts of silane modified polyether, 10-30 parts of plasticizer, 40-60 parts of nano calcium carbonate, 1-3 parts of fumed silica and 0.5-3 parts of light-cured resin; the component B comprises the following raw materials in parts by mass: 40-60 parts of nano calcium carbonate, 20-40 parts of plasticizer, 0.5-10 parts of catalyst, 0.5-2 parts of accelerator and 0.5-1.5 parts of coupling agent; the light-cured resin is trimethylolpropane triacrylate; the accelerant is laurylamine;
the silane modified polyether is SAX510 or/and SAX 520; or SAX510 or/and SAX520 in combination with one or more of S810, S203H and S303H.
2. The low modulus, high elasticity two component silane modified polyether sealant of claim 1, which is characterized by: the silane modified polyether consists of SAX510 and SAX520 in a mass ratio of 1-4: 1.
3. The low modulus, high elasticity two component silane modified polyether sealant of claim 1, which is characterized by: the plasticizer comprises one or more of diisodecyl phthalate, diisononyl phthalate, polyether polyol N220 and polyether polyol N330.
4. The low modulus, high elasticity two component silane modified polyether sealant of claim 1, which is characterized by: the coupling agent comprises one or more of N- (beta-aminoethyl) -gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane and gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane.
5. The low modulus, high elasticity two component silane modified polyether sealant of claim 1, which is characterized by: the catalyst is one or a combination of stannous isooctanoate, dibutyltin dilaurate, dibutyltin diacetate and dibutyltin bis (acetyl acetonate).
6. The low modulus, high elasticity two component silane modified polyether sealant of claim 1, which is characterized by: the nano calcium carbonate is a cube with regular appearance and a specific surface area of 8-15m2/g。
7. The low modulus, high elasticity two component silane modified polyether sealant of claim 6, which is characterized by: the preparation method of the nano calcium carbonate comprises the following steps:
s1, adding a surface inhibitor consisting of nonpolar alcohols and fatty alcohol-polyoxyethylene ether into lime milk with the specific gravity of 1.045-1.065, wherein the addition amount of the surface inhibitor is 1.0-2.0% of the mass of the lime milk, fully and uniformly stirring, adding the lime milk with the same specific gravity through carbon dioxide mixed gas, the addition amount of the lime milk is 10-15% of the mass of the original lime milk, stopping ventilation when the pH of a reaction system is 7.0, and finishing carbonation reaction to obtain a precipitated calcium carbonate suspension;
s2, performing surface treatment on the precipitated calcium carbonate suspension by stearic acid, wherein the usage amount of the stearic acid is 2-4% of the dry basis weight of the calcium carbonate, and performing filter pressing, drying and sieving to obtain the nano calcium carbonate.
8. The low modulus, high elasticity two component silane modified polyether sealant of claim 1, which is characterized by: the fumed silica is 150-200m2A/g hydrophobic fumed silica.
9. The method for preparing the low-modulus high-elasticity two-component silane-modified polyether sealant according to any one of claims 1 to 8, which is characterized in that: the method comprises the following steps:
adding silane modified polyether, plasticizer, nano calcium carbonate, fumed silica and light-cured resin into a planetary stirrer, stirring at high speed for 60min under the vacuum degree of-0.095 MPa, and cooling to below 50 ℃ to obtain a component A; adding the plasticizer and the nano calcium carbonate into another planetary stirrer, stirring at a high speed for 30min under the vacuum degree of-0.095 MPa, cooling to below 50 ℃, adding the catalyst, the catalyst accelerator and the coupling agent, and stirring at a medium speed for 15min under the vacuum degree of-0.095 MPa to obtain a component B; and uniformly mixing the component A and the component B according to the mass ratio of 10:1 to obtain the sealant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011358274.XA CN112521867B (en) | 2020-11-27 | 2020-11-27 | Low-modulus high-elasticity two-component silane modified polyether sealant and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114058292A (en) * | 2021-12-30 | 2022-02-18 | 泰安乐邦环保科技有限公司 | Paint slag composite powder material and modified silane polyether adhesive prepared from same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723429A (en) * | 2008-10-16 | 2010-06-09 | 上海华明高技术（集团）有限公司 | Method for manufacturing nano calcium carbonate from high-concentration carbon dioxide industrial exhaust gases |
| CN108893061A (en) * | 2018-07-12 | 2018-11-27 | 广西德本仕密封材料有限公司 | A kind of weather-proof dual-component silicane modified polyether seal glue and preparation method thereof |
| CN110373144A (en) * | 2019-08-28 | 2019-10-25 | 广西华纳新材料科技有限公司 | A kind of low modulus height rebound silane modified polyether seal glue of two-component and preparation method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723429A (en) * | 2008-10-16 | 2010-06-09 | 上海华明高技术（集团）有限公司 | Method for manufacturing nano calcium carbonate from high-concentration carbon dioxide industrial exhaust gases |
| CN108893061A (en) * | 2018-07-12 | 2018-11-27 | 广西德本仕密封材料有限公司 | A kind of weather-proof dual-component silicane modified polyether seal glue and preparation method thereof |
| CN110373144A (en) * | 2019-08-28 | 2019-10-25 | 广西华纳新材料科技有限公司 | A kind of low modulus height rebound silane modified polyether seal glue of two-component and preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114058292A (en) * | 2021-12-30 | 2022-02-18 | 泰安乐邦环保科技有限公司 | Paint slag composite powder material and modified silane polyether adhesive prepared from same |
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Address after: 530103 No.29, Ganwei street, Ganwei Town, Wuming District, Nanning City, Guangxi Zhuang Autonomous Region Applicant after: Guangxi Warner New Material Co.,Ltd. Address before: 530103 No.29, Ganwei street, Ganwei Town, Wuming District, Nanning City, Guangxi Zhuang Autonomous Region Applicant before: GUANGXI HUANA NEW MATERIALS TECHNOLOGY Co.,Ltd. |
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