CN110699028B - Two-component silyl-terminated polyether modified sealant and preparation method thereof - Google Patents
Two-component silyl-terminated polyether modified sealant and preparation method thereof Download PDFInfo
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- CN110699028B CN110699028B CN201911027803.5A CN201911027803A CN110699028B CN 110699028 B CN110699028 B CN 110699028B CN 201911027803 A CN201911027803 A CN 201911027803A CN 110699028 B CN110699028 B CN 110699028B
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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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
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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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
Abstract
The invention provides a two-component silyl-terminated polyether modified sealant and a preparation method thereof, wherein the modified sealant provided by the invention consists of a component A and a component B; the component A is selected to comprise 30-50 parts by weight of silyl-terminated polyether modified polymer, 15-25 parts by weight of plasticizer A, 40-50 parts by weight of filler A and 4-10 parts by weight of auxiliary material A; the component B comprises 40-60 parts by weight of filler B, 10-25 parts by weight of plasticizer B, 0.5-2 parts by weight of stabilizer, 5-15 parts by weight of terminal silane-based polyurethane resin, 5-15 parts by weight of water remover, 10-20 parts by weight of adhesion promoter and 3-15 parts by weight of catalyst; the obtained silyl-terminated polyether modified sealant can be quickly cured, the positioning time is short, the bonding strength is high, particularly the bonding strength to metal is more than 2.0MPa, the storage time of the sealant can reach 12 months, and the quality guarantee period is long.
Description
Technical Field
The invention relates to the field of sealants, in particular to a two-component silyl-terminated polyether modified sealant and a preparation method thereof.
Background
The current sealants used in construction and industrial markets are based on silicones and polyurethanes. The silicone sealant has excellent aging resistance, but poor pollution resistance and low bonding strength to a base material; although the polyurethane sealant has high strength, the polyurethane sealant contains free isocyanate, easily forms bubbles during curing, has poor aging resistance and often needs to be matched with a base coat for use. The silyl-terminated polyether modified sealant is firstly developed by Kaneka corporation of Japan, integrates the performances of silicone and polyurethane sealant, has the advantages of wide adhesion to a base material, environmental friendliness, high deformation displacement resistance, low pollution and the like, and is widely concerned in the market.
The bonding and fixing of the elevator reinforcing ribs are changed from double-sided adhesive tapes to bi-component acrylate structural adhesive and then to end-silyl polyether sealant, wherein the double-sided adhesive tapes are high in cost and easy to cause water vapor permeation in the using process to damage bonding surfaces; the bi-component acrylate structural adhesive has high bonding strength and high positioning speed, but has high rigidity, brittle body and poor anti-vibration capability; the silyl-terminated polyether modified sealant has high bonding strength to the reinforcing ribs, has certain elasticity, and can also play a role in sound insulation and noise reduction. At present, the commonly used silyl-terminated polyether modified sealant is a single-component silyl-terminated sealant, because the curing mode of the sealant is moisture curing, a surface curing layer prevents moisture from permeating into the interior, the deep curing is slower, and the final strength is reached within 7d or longer, therefore, the two-component silane modified polyether sealing material and the preparation method thereof disclosed in CN105219337B are characterized in that a catalyst and a polymer are respectively placed in the component A and the component B, and are stirred and mixed at normal temperature, because of the existence of moisture in the components, the mixed interior and exterior are simultaneously cured, and the curing speed is obviously improved; however, the sealants obtained by this method have poor storage stability and still have poor shear strength to the substrate.
Therefore, the development of the high-performance silane-terminated polyether modified sealant has important significance.
Disclosure of Invention
In view of the above, the technical problem to be solved by the invention is to provide a two-component silyl terminated polyether modified sealant and a preparation method thereof.
The invention provides a two-component silyl-terminated polyether modified sealant, which consists of a component A and a component B;
wherein the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
preferably, the silyl terminated polyether modified polymer is one or more of a silyl terminated polyether modified polymer with the model number of S303H, a silyl terminated polyether modified polymer with the model number of SAX400 and a silyl terminated polyether modified polymer with the model number of SAT 720.
Preferably, the plasticizer a is DIDP or PPG 2000.
Preferably, the filler A comprises 40-50 parts by weight of light calcium carbonate and 3-10 parts by weight of heavy calcium carbonate.
Preferably, the auxiliary material A comprises 2-4 parts by weight of reinforcing filler, 1-3 parts by weight of coloring filler and 1-3 parts by weight of ultraviolet light absorber.
Preferably, the filler B comprises 30-40 parts by weight of light calcium carbonate and 5-15 parts by weight of heavy calcium carbonate.
Preferably, the plasticizer B is PPG2000, DIDP or DINP.
Preferably, the adhesion promoter is a mixed adhesive of an aminosilane coupling agent and KH 560.
Preferably, the moisture content of the component A is 1000-2000 ppm.
The invention also provides a preparation method of the two-component silyl-terminated polyether modified sealant, which comprises the following steps:
mixing and stirring 30-50 parts by weight of a silyl-terminated polyether modified polymer, 15-25 parts by weight of a plasticizer A, 40-50 parts by weight of a filler A and 4-10 parts by weight of an auxiliary material A to obtain a component A;
adding 40-60 parts by weight of filler B, 10-25 parts by weight of plasticizer B and 0.5-2 parts by weight of stabilizer into a planetary stirring kettle, dehydrating for 2 hours under the conditions that the vacuum degree is greater than 0.09MPa and the temperature is 100 plus materials at 110 ℃, then cooling to below 40 ℃, continuously and sequentially adding 5-15 parts by weight of terminal silane-based polyurethane resin, 5-15 parts by weight of water removing agent, 10-20 parts by weight of adhesion promoter and 3-15 parts by weight of catalyst, mixing and stirring to obtain the component B.
Compared with the prior art, the invention provides a two-component silyl-terminated polyether modified sealant which consists of a component A and a component B; the component A is selected to comprise 30-50 parts by weight of silyl-terminated polyether modified polymer, 15-25 parts by weight of plasticizer A, 40-50 parts by weight of filler A and 4-10 parts by weight of auxiliary material A; the component B comprises 40-60 parts by weight of filler B, 10-25 parts by weight of plasticizer B, 0.5-2 parts by weight of stabilizer, 5-15 parts by weight of terminal silane-based polyurethane resin, 5-15 parts by weight of water remover, 10-20 parts by weight of adhesion promoter and 3-15 parts by weight of catalyst; the obtained silyl-terminated polyether modified sealant can be quickly cured, the positioning time is short, the bonding strength is high, particularly the bonding strength to metal is more than 2.0MPa, the storage time of the sealant can reach 12 months, and the quality guarantee period is long.
Detailed Description
The invention provides a two-component silyl-terminated polyether modified sealant, which consists of a component A and a component B;
wherein the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
according to the invention, the mass ratio of the component A to the component B is preferably 1: 0.8-1.2, and more preferably 1: 1.
According to the invention, the end-silane-group polyether modified polymer is preferably one or more of an end-silane-group polyether modified polymer with the model of S303H, an end-silane-group polyether modified polymer with the model of SAX400 and an end-silane-group polyether modified polymer with the model of SAT720, more preferably one or two of an end-silane-group polyether modified polymer with the model of S303H and an end-silane-group polyether modified polymer with the model of SAT720, and most preferably an end-silane-group polyether modified polymer with the model of S303H and an end-silane-group polyether modified polymer with the model of SAT 720; when the silyl-terminated polyether modified polymer is a mixture of the silyl-terminated polyether modified polymer with the model S303H and the silyl-terminated polyether modified polymer with the model SAT720, the weight ratio of the silyl-terminated polyether modified polymer with the model S303H to the silyl-terminated polyether modified polymer with the model SAT720 is 25: 10-20, and more preferably 25: 15; in the invention, in the component A, the weight part of the silyl-terminated polyether modified polymer is preferably 30 to 50 parts by weight, and more preferably 40 to 45 parts by weight.
According to the invention, the plasticizer A is DIDP or PPG2000, and in the component A, the weight part of the plasticizer A is preferably 20-22 parts.
According to the invention, the filler A comprises 40-50 parts by weight of light calcium carbonate and 3-10 parts by weight of heavy calcium carbonate, and more preferably comprises 45-48 parts by weight of light calcium carbonate and 5-8 parts by weight of heavy calcium carbonate; in the component A, the weight part of the filler A is preferably 45-48 parts.
According to the invention, the auxiliary material A preferably comprises 2-4 parts by weight of reinforcing filler, 1-3 parts by weight of coloring filler and 1-3 parts by weight of ultraviolet light absorber, and more preferably comprises 2.5-3 parts by weight of reinforcing filler, 2-2.5 parts by weight of coloring filler and 1.5-2 parts by weight of ultraviolet light absorber; the reinforcing filler is preferably hydrophilic fumed silica, the coloring filler is preferably carbon black, the ultraviolet light absorber is preferably one or two of basf 329 and basf 326, and in the component A, the auxiliary material A is preferably 6-8.5 parts by weight.
According to the invention, the moisture content of the component A is preferably 1000 to 2000ppm, more preferably 1500 to 1800 ppm.
According to the invention, the filler B preferably comprises 30-40 parts by weight of light calcium carbonate and 5-15 parts by weight of heavy calcium carbonate, and more preferably comprises 35-38 parts by weight of light calcium carbonate and 10-12 parts by weight of heavy calcium carbonate; in the component B, the weight part of the filler B in the component B is preferably 45 to 55 parts, and more preferably 50 to 52 parts.
According to the invention, the plasticizer is preferably PPG2000, DIDP or DINP; in the component B, the weight part of the plasticizer B is preferably 15 to 20 parts, and more preferably 16 to 18 parts.
According to the invention, the stabilizer is preferably basf 1010 or basf 245; in the component B, the weight part of the stabilizer is preferably 1 to 1.5 parts, and more preferably 1.2 to 1.4 parts.
According to the invention, the adhesion promoter is preferably a mixed adhesive of an aminosilane coupling agent and KH560, wherein the aminosilane coupling agent is an aminosilane coupling agent A-1120; in the adhesion promoter, the aminosilane coupling agent is preferably 6-10 parts by weight, more preferably 8-9 parts by weight, and KH560 is preferably 2-6 parts by weight, more preferably 3-4 parts by weight; in the invention, in the component B, the weight part of the adhesion promoter is preferably 12 to 18 parts, and more preferably 14 to 16 parts.
According to the invention, the weight part of the terminal silane-based polyurethane resin in the component B is preferably 8 to 13 parts by weight, and more preferably 10 to 12 parts by weight.
According to the invention, the water scavenger is preferably vinyltrimethoxysilane 171; in the component B, the preferable weight part of the water removing agent is 8-12 parts.
According to the invention, the catalyst is preferably an organotin catalyst, more preferably dibutyltin dilaurate; in the component B, the weight part of the catalyst is preferably 5-8 parts.
According to the invention, in the component B, when the raw materials are mixed, the filler B, the plasticizer B and the stabilizer are mixed and dehydrated, and then the silane-based polyurethane resin, the water removal agent, the adhesion promoter and the catalyst are added and mixed to obtain the component B.
The invention also provides a preparation method of the two-component silyl-terminated polyether modified sealant, which comprises the following steps:
mixing and stirring 30-50 parts by weight of a silyl-terminated polyether modified polymer, 15-25 parts by weight of a plasticizer A, 40-50 parts by weight of a filler A and 4-10 parts by weight of an auxiliary material A to obtain a component A;
mixing and stirring 40-60 parts by weight of filler B, 10-25 parts by weight of plasticizer B, 0.5-2 parts by weight of stabilizer, 5-15 parts by weight of terminal silane-based polyurethane resin, 5-15 parts by weight of water removing agent, 10-20 parts by weight of adhesion promoter and 3-15 parts by weight of catalyst to obtain component B.
According to the invention, 30-50 parts by weight of silyl-terminated polyether modified polymer, 15-25 parts by weight of plasticizer A, 40-50 parts by weight of filler A and 4-10 parts by weight of auxiliary material A are mixed and stirred to obtain component A; the invention has no special requirement on the mixing and stirring method, and the mixing method known in the field can be used, for example, all the raw materials are put into a double-planet stirring kettle and stirred for 1-2 hours under the conditions that the vacuum degree is more than 0.09MPa and the stirring speed is more than 25rpm/min, so as to obtain the component A.
According to the invention, 40-60 parts by weight of filler B, 10-25 parts by weight of plasticizer B, 0.5-2 parts by weight of stabilizer, 5-15 parts by weight of terminal silane-based polyurethane resin, 5-15 parts by weight of water scavenger, 10-20 parts by weight of adhesion promoter and 3-15 parts by weight of catalyst are mixed and stirred to obtain component B; the invention has no special requirement on the mixing mode of each raw material in the component B, the mixing modes known in the field can be adopted, preferably, when the raw materials are mixed, the filler B, the plasticizer B and the stabilizer are mixed and dehydrated, and then the silane-based polyurethane resin, the water removing agent, the adhesion promoter and the catalyst are added and mixed to obtain the component B; the method for mixing and dehydrating the filler B, the plasticizer B and the stabilizer is not specially required, preferably, all the raw materials are added into a double-planet stirring kettle, dehydration is carried out for 2 hours under the conditions that the vacuum degree is more than 0.09MPa, the temperature is 100-110 ℃, the stirring speed is more than 25rpm/min, cooling is carried out by introducing cooling water, the temperature is reduced to be below 40 ℃, the silane-based polyurethane resin, the water remover and the adhesion promoter are added, mixing and stirring are carried out for 20-40 minutes, and finally, the catalyst is added, and stirring is carried out, so that the component B is obtained.
The invention provides a two-component silyl-terminated polyether modified sealant, which consists of a component A and a component B; the component A is selected to comprise 30-50 parts by weight of silyl-terminated polyether modified polymer, 15-25 parts by weight of plasticizer A, 40-50 parts by weight of filler A and 4-10 parts by weight of auxiliary material A; the component B comprises 40-60 parts by weight of filler B, 10-25 parts by weight of plasticizer B, 0.5-2 parts by weight of stabilizer, 5-15 parts by weight of terminal silane-based polyurethane resin, 5-15 parts by weight of water remover, 10-20 parts by weight of adhesion promoter and 3-15 parts by weight of catalyst; the obtained silyl-terminated polyether modified sealant can be quickly cured, the positioning time is short, the bonding strength is high, particularly the bonding strength to metal is more than 2.0MPa, the storage time of the sealant can reach 12 months, and the quality guarantee period is long.
The following will clearly and completely describe the technical solutions of 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 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
The component A comprises: 40 parts of silyl-terminated polyether modified polymer 1 (S303H 25 parts and SAT 72015 parts of Brillouin chemistry), 20 parts of plasticizer DIDP, 45 parts of filler A (40 parts of light calcium carbonate with the particle size of 0.6 mu m and 5 parts of heavy calcium carbonate), 2.5 parts of reinforcing filler (hydrophilic fumed silica), 2 parts of coloring filler (carbon black) and 1.5 parts of ultraviolet light absorber (329 of Baffs) are added into a double-planetary stirring kettle, stirred for 1 hour under the conditions that the vacuum degree is more than 0.09MPa and the stirring speed is more than 25rpm/min, the water content is controlled within the range of 1000-2000 ppm, and the mixture is discharged and filled into a 300ml A pipe to prepare the component A.
The component B comprises: adding 50 parts of filler B (40 parts of light calcium carbonate and 10 parts of heavy calcium carbonate with the diameter of 0.6 mu m), 15 parts of plasticizer DIDP and 1 part of heat stabilizer (Pasf 1010) into a double-planet stirring kettle, dehydrating for 2h under the conditions that the vacuum degree is more than 0.09MPa, the temperature is 100 ℃ and the stirring speed is more than 25rpm/min, cooling by cooling water, sequentially adding 10 parts of polymer 2 (silane-terminated polyurethane resin), 8 parts of water removing agent (vinyltrimethoxysilane 171) and 12 parts of adhesion promoter (aminosilane coupling agent A-11208 parts and KH 5604 parts) when the temperature is reduced to 40 ℃, stirring for 20min, adding 8 parts of catalyst (organic tin catalyst), continuously stirring for 10min under the same condition, discharging, and filling into a 300ml B pipe to obtain the component B.
The two-component silyl-terminated polyether modified sealant obtained was tested, and the results are shown in table 1.
Example 2
The component A comprises: 40 parts of silyl-terminated polyether modified polymer 1 (SAX 40040 parts of Brillouin chemical), 20 parts of plasticizer DIDP, 45 parts of filler A (40 parts of light calcium carbonate with the particle size of 0.6 mu m and 5 parts of heavy calcium carbonate), 2.5 parts of reinforcing filler (hydrophilic fumed silica), 2 parts of coloring filler (carbon black) and 1.5 parts of ultraviolet light absorber (329 of Basff) are added into a double-planet stirring kettle, stirred for 1 hour under the conditions that the vacuum degree is more than 0.09MPa and the stirring speed is more than 25rpm/min, the water content is controlled within the range of 1000-2000 ppm, and discharged and filled into a 300ml A pipe to prepare a component A
The component B comprises: adding 50 parts of filler B (40 parts of light calcium carbonate and 10 parts of heavy calcium carbonate with the diameter of 0.6 mu m), 15 parts of plasticizer DIDP and 1 part of heat stabilizer (Pasf 1010) into a double-planet stirring kettle, dehydrating for 2h under the conditions that the vacuum degree is more than 0.09MPa, the temperature is 100 ℃ and the stirring speed is more than 25rpm/min, cooling by cooling water, sequentially adding 10 parts of polymer 2 (silane-terminated polyurethane resin), 8 parts of water removing agent (vinyltrimethoxysilane 171) and 12 parts of adhesion promoter (aminosilane coupling agent A-11208 parts and KH 5604 parts) when the temperature is reduced to 40 ℃, stirring for 20min, adding 5 parts of catalyst (organic tin catalyst), continuously stirring for 10min under the same condition, discharging, and filling into a 300ml B pipe to obtain the component B.
The two-component silyl-terminated polyether modified sealant obtained was tested, and the results are shown in table 1.
Example 3
The component A comprises: 40 parts of silyl-terminated polyether modified polymer 1 (S303H 25 parts and SAT 72015 parts of Brillouin chemistry), 20 parts of plasticizer (PPG2000), 45 parts of filler A (40 parts of light calcium carbonate and 5 parts of heavy calcium carbonate with the particle size of 0.6 mu m), 2.5 parts of reinforcing filler (hydrophilic fumed silica), 2 parts of coloring filler (carbon black) and 1.5 parts of ultraviolet light absorber (329 of Pasfu) are added into a double-planet stirring kettle, stirred for 1h under the conditions that the vacuum degree is more than 0.09MPa and the stirring speed is more than 25rpm/min, the water content is controlled within the range of 2500-3000 ppm, and the mixture is discharged and filled into a 300ml A tube to prepare the component A.
The component B comprises: adding 50 parts of filler B (40 parts of light calcium carbonate with the diameter of 0.6 mu m and 10 parts of heavy calcium carbonate), 15 parts of plasticizer (PPG2000) and 1 part of heat stabilizer (Pasf 1010) into a double-planet stirring kettle, dehydrating for 2 hours under the conditions that the vacuum degree is more than 0.09MPa, the temperature is 100 ℃ and 110 ℃, and the stirring speed is more than 25rpm/min, cooling by cooling water, sequentially adding 10 parts of polymer 2 (silane-terminated polyurethane resin), 8 parts of water removing agent (vinyltrimethoxysilane 171) and 12 parts of adhesion promoter (aminosilane coupling agent A-11208 parts and KH 5604 parts) when the temperature is reduced to 40 ℃, stirring for 20 minutes, adding 5 parts of catalyst (organic tin catalyst), continuously stirring for 10 minutes under the same condition, discharging, and packaging into a 300ml B tube to obtain the component B.
The two-component silyl-terminated polyether modified sealant obtained was tested, and the results are shown in table 1.
Example 4
The component A comprises: adding 40 parts of silyl-terminated polyether modified polymer 1 (S303H 25 parts and SAT 72015 parts of Brillouin chemistry), 20 parts of plasticizer (PPG2000), 45 parts of filler A (40 parts of light calcium carbonate and 5 parts of heavy calcium carbonate with the particle size of 0.6 mu m), 2.5 parts of reinforcing filler (hydrophilic fumed silica), 2 parts of coloring filler (carbon black) and 1.5 parts of ultraviolet light absorber (Pasv 326 and the like) into a double-planet stirring kettle, stirring for 1h under the conditions that the vacuum degree is more than 0.09MPa and the stirring speed is more than 25rpm/min, controlling the water content to be within the range of 1000-2000 ppm, and discharging and filling into a 300ml A pipe to prepare the component A.
The component B comprises: adding 50 parts of filler B (40 parts of light calcium carbonate with the diameter of 0.6 mu m and 10 parts of heavy calcium carbonate), 15 parts of plasticizer (PPG2000) and 1 part of heat stabilizer (Pasf 1010) into a double-planet stirring kettle, dehydrating for 2 hours under the conditions that the vacuum degree is more than 0.09MPa, the temperature is 100 ℃ and 110 ℃, and the stirring speed is more than 25rpm/min, cooling by cooling water, sequentially adding 10 parts of polymer 2 (silane-terminated polyurethane resin), 8 parts of water removing agent (vinyltrimethoxysilane 171) and 12 parts of adhesion promoter (aminosilane coupling agent A-11208 parts and KH 5604 parts) when the temperature is reduced to 40 ℃, stirring for 20 minutes, adding 5 parts of catalyst (organic tin catalyst), continuously stirring for 10 minutes under the same condition, discharging, and packaging into a 300ml B tube to obtain the component B.
The two-component silyl-terminated polyether modified sealant obtained was tested, and the results are shown in table 1.
Example 5
The component A comprises: 40 parts of silyl-terminated polyether modified polymer 1 (S303H 25 parts and SAT 72015 parts of Brillouin chemistry), 20 parts of plasticizer (DIDP), 45 parts of filler A (40 parts of light calcium carbonate and 5 parts of heavy calcium carbonate with the particle size of 0.6 mu m), 2.5 parts of reinforcing filler (hydrophilic fumed silica), 2 parts of coloring filler (carbon black) and 1.5 parts of ultraviolet light absorber (Pasv 326) are added into a double-planetary stirring kettle, stirred for 1 hour under the conditions that the vacuum degree is more than 0.09MPa and the stirring speed is more than 25rpm/min, the water content is controlled within the range of 1000-2000 ppm, and the mixture is discharged and filled into a 300ml A pipe to prepare the component A.
The component B comprises: adding 50 parts of filler B (40 parts of light calcium carbonate with the diameter of 0.6 mu m and 10 parts of heavy calcium carbonate), 15 parts of plasticizer (DIDP) and 1 part of heat stabilizer (Pasf 1010) into a double-planet stirring kettle, dehydrating for 2 hours under the conditions that the vacuum degree is more than 0.09MPa, the temperature is 100 ℃ and 110 ℃, and the stirring speed is more than 25rpm/min, cooling by cooling water, sequentially adding 10 parts of polymer 2 (silane-terminated polyurethane resin), 8 parts of water removing agent (vinyltrimethoxysilane 171) and 12 parts of adhesion promoter (aminosilane coupling agent A-112012) when the temperature is reduced to 40 ℃, stirring for 20 minutes, adding 5 parts of catalyst (organic tin catalyst), continuously stirring for 10 minutes under the same condition, discharging and loading into a 300ml B tube to prepare the component B.
The two-component silyl-terminated polyether modified sealant obtained was tested, and the results are shown in table 1.
Example 6
The component A comprises: 50 parts of silane-modified polyether (SAX 40030 parts and S303H 20 parts by Kaneka, Japan), 20 parts of plasticizer (DIDP), 10 parts of reinforcing filler (hydrophobic fumed silica), 10 parts of coloring filler (carbon black), 3 parts of thixotropic agent (including 2 parts of hydrogenated castor oil and 1 part of organic bentonite), 1 part of light stabilizer (including 3260.5 parts and 2450.5 parts of Pasteur) were added to a double planetary stirring tank and stirred for 10 min; adding 60 parts of an incremental filler A (comprising 50 parts of nano active calcium carbonate and 10 parts of heavy calcium carbonate), dispersing and stirring for 40min under the condition that the vacuum degree is more than 0.09MPa, removing the vacuum, and adding 3 parts of a silane coupling agent (comprising 2 parts of gamma-methacryloxypropyltrimethoxysilane and 1 part of isocyanatopropyltrimethoxysilane); maintaining the same stirring condition for 15min, controlling the water content within the range of 1000-2000 ppm, discharging and loading into a 300ml A tube to obtain the component A.
And B component: adding 30 parts of plasticizer (DIDP) and 40 parts of incremental filler B (nano active calcium carbonate) into a double-planet stirring kettle, dispersing and stirring for 30min under the condition that the vacuum degree is greater than 0.09MPa, removing the vacuum, adding 0.1 part of organic tin catalyst (dibutyltin dilaurate and 8 parts of titanium catalyst (isobutyl titanate)), stirring for 15min under the condition that the vacuum degree is greater than 0.09MPa, and discharging and loading into a 300ml B tube to obtain the component B.
The two-component silyl-terminated polyether modified sealant obtained was tested, and the results are shown in table 1.
TABLE 1
Attached: the surface drying time and the curing depth of 6h are detected according to GB/T13477; the tensile strength and the elongation at break are detected according to GB/T528; the shear strength is detected according to GB/T7124-; the pot life was tested according to GB/T7123.2-2002.
As can be seen from Table 1, the use of the organotin catalyst was increased, the tack-free time was shortened, and the shear strength, tensile strength and elongation at break were all reduced. The moisture content of the component A is increased, deep curing is accelerated, but the shear strength to a stainless steel interface is reduced, and when the silane coupling agent KH560 is selected as the adhesion promoter, the shear strength to a metal base material can be improved; example 6 is the prior art, and it can be seen by comparing with example 4 that the invention has significantly improved surface drying time, curing speed and storage stability, especially has much improved shear strength to metal materials, and is more suitable for industrial field.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (5)
1. A two-component silyl-terminated polyether modified sealant consists of a component A and a component B;
wherein the component A comprises the following components in parts by weight:
the silyl-terminated polyether modified polymer is one or more of a silyl-terminated polyether modified polymer with the model number of S303H, a silyl-terminated polyether modified polymer with the model number of SAX400 and a silyl-terminated polyether modified polymer with the model number of SAT 720;
the plasticizer A is DIDP or PPG 2000;
the moisture content of the component A is 1000-2000 ppm;
the component B comprises the following components in parts by weight:
the plasticizer B is PPG2000, DIDP or DINP; the adhesion promoter is a mixed adhesive of an aminosilane coupling agent and KH 560.
2. The two-component silane-terminated polyether modified sealant as claimed in claim 1, wherein the filler A comprises 40-50 parts by weight of light calcium carbonate and 3-10 parts by weight of heavy calcium carbonate.
3. The two-component silane-terminated polyether modified sealant as claimed in claim 1, wherein the auxiliary material A comprises 2-4 parts by weight of reinforcing filler, 1-3 parts by weight of coloring filler and 1-3 parts by weight of ultraviolet absorber.
4. The two-component silane-terminated polyether modified sealant as claimed in claim 1, wherein the filler B comprises 30-40 parts by weight of light calcium carbonate and 5-15 parts by weight of heavy calcium carbonate.
5. A preparation method of the two-component silyl terminated polyether modified sealant as claimed in any one of claims 1 to 4, comprising the following steps:
mixing and stirring 30-50 parts by weight of a silyl-terminated polyether modified polymer, 15-25 parts by weight of a plasticizer A, 40-50 parts by weight of a filler A and 4-10 parts by weight of an auxiliary material A to obtain a component A;
adding 40-60 parts by weight of filler B, 10-25 parts by weight of plasticizer B and 0.5-2 parts by weight of stabilizer into a planetary stirring kettle, dehydrating for 2 hours under the condition that the vacuum degree is greater than 0.09MPa and the temperature is 100-110 ℃, then cooling to below 40 ℃, continuously and sequentially adding 5-15 parts by weight of silane-terminated polyurethane resin, 5-15 parts by weight of water removing agent, 10-20 parts by weight of adhesion promoter and 3-15 parts by weight of catalyst, mixing and stirring to obtain the component B.
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