CN108047923B - Modified silicone sealant primer for fabricated building and preparation method thereof - Google Patents
Modified silicone sealant primer for fabricated building and preparation method thereof Download PDFInfo
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- CN108047923B CN108047923B CN201711447622.9A CN201711447622A CN108047923B CN 108047923 B CN108047923 B CN 108047923B CN 201711447622 A CN201711447622 A CN 201711447622A CN 108047923 B CN108047923 B CN 108047923B
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3855—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
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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
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
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Abstract
The invention discloses a modified silicone sealant primer coating liquid for an assembly type building and a preparation method thereof, wherein the modified silicone sealant primer coating liquid comprises the following components in parts by weight: a polyurethane prepolymer A; silane modified isocyanate prepolymer B; 0.5-2% of ethyl orthosilicate; 0.1-1.5% of a silane coupling agent; 0.05-0.2% of a tin catalyst; 0.02-0.1% of amine catalyst; 49-68% of a solvent; the polyurethane prepolymer A is prepared by reacting diphenylmethane diisocyanate with a polyhydroxy compound, and the silane modified isocyanate is prepared by reacting silane with an isocyanate monomer. The modified silicone sealant primer for the fabricated building has the advantages of good applicability to sealants, high curing speed, good mechanical property, good water resistance, difficulty in sticking, good stain resistance and convenience in use.
Description
Technical Field
The invention relates to the field of high polymer sealing materials, in particular to a modified silicone sealing adhesive primer for an assembly type building and a preparation method thereof.
Background
The assembly type building (PC building) is a great innovation in the building industry, has the advantages of energy saving, material saving, water saving, land saving, environmental protection and the like, and has a huge application prospect. However, there are also difficulties in the development of the assembly construction industry that need to be overcome, such as insufficient water resistance of the field joints. The traditional filling mortar is easy to crack at the joint position, and the sealing of the joint position by the traditional silicone adhesive or polyurethane adhesive has some defects: the silicone adhesive has poor adhesion to concrete, and the surface of the silicone adhesive cannot be brushed, so that the subsequent coating brushing operation is influenced; the polyurethane sealant has poor effect in ultraviolet aging test. In view of comprehensive effects, the modified silicone sealant with ultraviolet aging resistance and strong displacement capability becomes the first choice for sealing the joints of the inner and outer walls of the fabricated building. The wall boards of the prefabricated building are finished in factories, release agents are generally brushed in a mold for the convenience of demolding during preparation, the residual release agents on the surface of concrete influence the adhesion of the sealant to the concrete, and the modified silicone sealant is no exception. Therefore, proper treatment of the concrete interface before sealant application is necessary for durable sealing of the joint, and priming is considered the most effective and convenient method.
The daily use of silicone adhesive and polyurethane adhesive also often meets the condition of needing primary coating, such as meeting difficult-to-stick base materials or having unsatisfactory surface properties of the base materials, however, through our tests and foreign research experiences, the primer prepared by the conventional silane coupling agent or the polyurethane prepolymer is not suitable for the modified silicone sealant, particularly, the adhesive force of the two-component modified silicone sealant is hardly improved obviously after the primer is used, and because the two-component modified silicone sealant has weak adhesion to base materials including concrete without a base coat, and in addition, the small molecular auxiliary agent in the modified silicone adhesive is easy to migrate to the surface of the adhesive after a certain time, the surface of the adhesive layer is sticky, causes pollution to the joint of the spliced seams and PC buildings, has poor coating property, poor appearance quality and poor pollution resistance, and the aggregation of small molecules at the interface can further interfere with the adhesion between the modified silicone adhesive and the PC building. It is therefore necessary to find a suitable primer solution.
Disclosure of Invention
Based on the above, the invention aims to overcome the defects of the prior art, and provides the modified silicone sealant primer for the fabricated building, which is suitable for primer coating of the modified silicone sealant for the fabricated building, and has the advantages of good applicability to the sealant, high curing speed, good mechanical property, good water resistance, difficulty in stickiness, good stain resistance and convenience in use.
The invention also aims to provide a preparation method of the modified silicone sealant priming solution for the fabricated building.
The technical scheme is as follows:
the modified silicone sealant priming solution for the fabricated building comprises the following components in parts by weight:
a polyurethane prepolymer A;
silane modified isocyanate prepolymer B;
0.5 to 2 percent of ethyl orthosilicate
0.1-1.5% of a silane coupling agent;
0.05-0.2% of a tin catalyst;
0.02-0.1% of amine catalyst;
48-68% of a solvent;
the polyurethane prepolymer A is prepared by reacting diphenylmethane diisocyanate with a polyhydroxy compound, and the silane modified isocyanate is prepared by reacting silane with an isocyanate monomer; the weight ratio of the polyurethane prepolymer A to the silane modified isocyanate prepolymer B is 1: 1-3: 1, and the polyurethane prepolymer A and the silane modified isocyanate prepolymer B account for 30-50% of the total weight.
The proper polyurethane prepolymer and silane modified isocyanate prepolymer are selected and matched with ethyl orthosilicate, silane coupling agent, tin catalyst, amine catalyst and the like, and the mixture ratio is adjusted to prepare the base coating liquid suitable for the modified silicone sealant.
In one embodiment, the polyurethane prepolymer A is prepared as follows: heating a polyhydroxy compound to 120 ℃, carrying out vacuum dehydration for 3-4 h, keeping the vacuum degree, cooling to 50-80 ℃, adding diphenylmethane diisocyanate under the protection of nitrogen, reacting for 2-4 h until the mass fraction of residual NCO is 3-6%, cooling and discharging, wherein the molar ratio of hydroxyl in the polyhydroxy compound to isocyanato in the diphenylmethane diisocyanate is 1: 1.5-2.1.
In one embodiment, the silane modified isocyanate prepolymer B is prepared by the following method: adding silane and an isocyanate monomer into a reaction kettle, reacting for 3-5 hours at 40-70 ℃ until the mass fraction of residual NCO is 3-6%, cooling and discharging, wherein the molar ratio of active hydrogen in the silane to isocyanate in the isocyanate monomer is 1: 1.2-1.5.
In one embodiment, the polyol is one or more of polyoxypropylene diol, polyoxypropylene triol, polytetrahydrofuran diol, polyethylene adipate diol, polyhexamethylene adipate-propylene glycol, polyepsilon caprolactone diol, castor oil, and polyethylene adipate diol.
In one embodiment, the isocyanate monomer is one or more of diphenylmethane diisocyanate (MDI), isophorone diisocyanate (IPDI), Hexamethylene Diisocyanate (HDI), polymethylene polyphenyl polyisocyanate (PAPI).
In one embodiment, the silane is one or more of 3-mercaptopropyltrimethoxysilane, gamma- (2, 3-glycidoxy) propyltrimethoxysilane, bis (gamma-trimethoxysilylpropyl) amine, 3- (2, 3-epoxypropyl) propyltrimethoxysilane.
In one embodiment, the tin-based catalyst is one or more of dibutyltin dilaurate, dibutyltin diacetate, stannous octoate, dibutyltin bis (dodecylthio) sulfate.
In one embodiment, the amine catalyst is one or more of N, N-dimethylcyclohexylamine, bis (2-dimethylaminoethyl) ether, N '-tetramethylalkylenediamine, triethylamine, N-dimethylbenzylamine, N-ethylmorpholine, N' -diethylpiperazine, triethanolamine, DMEA.
The silane coupling agent is one or more of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, N- β - (aminoethyl) -gamma-aminopropyl trimethoxy silane, gamma-aminopropyl triethoxy silane and 3-aminopropyl trimethoxy silane.
In one embodiment, the solvent is one or more of toluene, xylene, acetone, ethyl acetate, butanone, butyl acetate, cyclohexanone, or mixtures thereof.
The preparation method of the modified silicone sealant primer for the fabricated building comprises the following steps: and (3) mixing the polyurethane prepolymer A and the silane modified isocyanate prepolymer B, adding a solvent, uniformly mixing, adding tetraethoxysilane, a silane coupling agent, a tin catalyst and an amine catalyst, uniformly stirring, discharging, sealing and storing.
The preparation method of the modified silicone sealant primer for the fabricated building is simple, and the components are mixed and stirred uniformly at normal temperature. When the primer is used, in order to ensure that the concrete base material is dustless and dry, the prepared primer is brushed for 2-3 times, and the gluing operation can be immediately carried out after the brushing operation is finished.
The invention has the beneficial effects that: the primer coating liquid has excellent applicability to the modified silicone sealant for the fabricated building, after primer coating treatment by the primer coating liquid, the adhesive force of the sealant to a concrete base material can be obviously improved, and the water resistance and the stain resistance of the sealant can also be improved, after the primer coating liquid is coated, the sealant can still keep the adhesive property to the concrete after being soaked in water for 7 days, which exceeds the test specification of soaking for 4 days in the JC/T881-2001 sealant for concrete joint, and the modified silicone sealant for the fabricated building has high curing speed and high construction efficiency.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
A modified silicone sealant priming solution for fabricated buildings comprises the following components:
100g of polyurethane prepolymer A;
100g of silane modified isocyanate prepolymer B;
ethyl orthosilicate 5g
2.5g of N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane;
0.5g of dibutyltin dilaurate;
0.25g of N, N-dimethylcyclohexylamine;
291g of ethyl acetate;
the preparation process of the polyurethane prepolymer A is as follows: 200g of polyether DL-100D (Shandong Lanxingdong Co., Ltd.) with the molecular weight of 1000 is dehydrated for 4h under vacuum at 120 ℃, nitrogen is introduced to reduce the temperature to 80 ℃, 76g of diphenylmethane diisocyanate is added at the temperature, the mixture is stirred and reacted for 4h under heat preservation until the isocyanate value of the final product reaches 3%, and finally the mixture is cooled to room temperature, discharged and sealed for storage.
The preparation process of the silane modified isocyanate prepolymer B is as follows: 300g of 3-mercaptopropyltrimethoxysilane and 230g of diphenylmethane diisocyanate are put into a reaction kettle to react for 5 hours at 50 ℃ until the mass fraction of residual NCO is 3 percent, and the materials are discharged after being cooled and sealed for storage.
And (2) mixing the polyurethane prepolymer A and the silane modified isocyanate prepolymer B according to the weight parts, adding a solvent, uniformly mixing, adding tetraethoxysilane, a silane coupling agent, a tin catalyst and an amine catalyst, uniformly stirring, discharging, sealing and storing.
Example 2
A modified silicone sealant priming solution for fabricated buildings comprises the following components:
100g of polyurethane prepolymer A;
100g of silane modified isocyanate prepolymer B;
7.5g of N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane;
6.4g of tetraethoxysilane
1g of dibutyltin dilaurate;
0.1g of N, N-dimethylcyclohexylamine;
and 285g of ethyl acetate.
The preparation process of the polyurethane prepolymer A and the silane modified isocyanate prepolymer B is the same as that of example 1. The preparation method of the primer coating liquid for the modified silicone sealant for the prefabricated building is as described in example 1.
Example 3
A modified silicone sealant priming solution for fabricated buildings comprises the following components:
150g of polyurethane prepolymer A;
100g of silane modified isocyanate prepolymer B;
2.75g of tetraethoxysilane
0.5g of N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane;
0.25g of dibutyltin dilaurate;
0.5g of N, N-dimethylcyclohexylamine;
246g of ethyl acetate.
The preparation process of the polyurethane prepolymer A and the silane modified isocyanate prepolymer B is the same as that of example 1. The preparation method of the primer coating liquid for the modified silicone sealant for the prefabricated building is as described in example 1.
Example 4
A modified silicone sealant priming solution for fabricated buildings comprises the following components:
112.5g of polyurethane prepolymer A;
37.5g of silane modified isocyanate prepolymer B;
tetraethoxysilane 10g
5g of N- β - (aminoethyl) -gamma-aminopropyltrimethoxysilane;
2.5g of dibutyltin dilaurate;
2.5g of N, N-dimethylcyclohexylamine;
330g of ethyl acetate.
The preparation process of the polyurethane prepolymer A and the silane modified isocyanate prepolymer B is the same as that of example 1. The preparation method of the primer coating liquid for the modified silicone sealant for the prefabricated building is as described in example 1.
Example 5
A modified silicone sealant priming solution for fabricated buildings comprises the following components:
120g of polyurethane prepolymer A;
120g of silane modified isocyanate prepolymer B;
ethyl orthosilicate 5g
7.5g of N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane;
5g of dibutyltin dilaurate;
2.5g of N, N-dimethylcyclohexylamine;
and 240g of ethyl acetate.
The preparation process of the polyurethane prepolymer A and the silane modified isocyanate prepolymer B is the same as that of example 1. The preparation method of the primer coating liquid for the modified silicone sealant for the prefabricated building is as described in example 1.
Example 6
A fabricated building modified silicone sealant primer solution, which has the same composition as in example 1, except that the polyurethane prepolymer a is prepared by the following process: 100g of polytetrahydrofuran glycol with the molecular weight of 1000 is dehydrated for 4 hours in vacuum at 120 ℃, nitrogen is introduced to reduce the temperature to 50 ℃, 52.5g of diphenylmethane diisocyanate is added at the temperature, the mixture is stirred and reacted for 4 hours under the condition of heat preservation until the isocyanate value of the final product reaches 6 percent, and finally the mixture is cooled to the room temperature, discharged and sealed for storage.
Example 7
The composition of the primer coating liquid for the modified silicone sealant for the prefabricated building is the same as that of example 1, except that the silane modified isocyanate prepolymer B is prepared by the following method: 180g of di (gamma-trimethoxysilylpropyl) amine and 88g of isophorone diisocyanate monomer are put into a reaction kettle and reacted for 4 hours at 55 ℃ until the mass fraction of residual NCO is 5 percent, and the materials are discharged after being cooled.
Example 8
A modified silicone sealant priming solution for fabricated buildings comprises the following components:
100g of polyurethane prepolymer A;
100g of silane modified isocyanate prepolymer B;
2.5g of N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane;
0.5g of dibutyltin dilauryl sulfide;
0.25g of N, N-dimethylbenzylamine;
200g of ethyl acetate;
96g of acetone;
the preparation process of the polyurethane prepolymer A and the silane modified isocyanate prepolymer B is the same as that of example 1. The preparation method of the primer coating liquid for the modified silicone sealant for the prefabricated building is as described in example 1.
Comparative example 1
The polyurethane primer PU100 which is prepared by Yongxu sealing element Limited and is suitable for polyurethane sealant is selected.
Comparative example 2
And (4) directly gluing the concrete block after cleaning without brushing the primer coating liquid to prepare a test piece for maintenance.
Comparative example 3
A modified silicone sealant primer for fabricated buildings, which has a composition substantially similar to that of example 1, except that in comparative example 3, silane chain extender is used instead of silane modified isocyanate prepolymer B described in example 1, and ethyl orthosilicate is not used, and the silane chain extender is prepared by the following method: adding 66 parts of gamma-glycidoxypropyltrimethoxysilane and 18 parts of xylene into a flask, slowly adding 45 parts of ethanolamine at the temperature of 75 ℃, and then carrying out heat preservation reaction for 2.5 hours to obtain the silane chain extender.
And mixing the polyurethane prepolymer A and a catalyst, adding the silane chain extender slowly at 85 ℃, keeping the temperature for reaction for 2 hours after the dropwise addition is finished, adding the solvent and the silane coupling agent, and uniformly stirring to obtain the primer solution.
The modified silicone sealant primer solutions for prefabricated buildings obtained in examples 1 to 8 and comparative examples 1 to 3 were applied to concrete samples and tested for tensile adhesion, water soaking and drying time, according to the following test methods or standards:
(1) tensile adhesion test: brushing a base coat on the inner wall of a cavity of a concrete test piece for 3 times according to the standard GB/T13477.8-2002 test for tensile cohesiveness, extruding the uniformly stirred two-component modified silicone adhesive into the cavity to prepare a test piece for curing, and performing tensile test after curing for 14 days according to the A method;
(2) and (3) soaking test: soaking the cured test piece in distilled water for 7 days, taking out, airing under standard conditions for 1 day, and performing tensile test;
(3) testing of drying time: the primer solutions were uniformly applied 3 times each to the concrete with a brush, and the surface drying time was measured.
(4) Stain resistance test: brushing a base coat on the inner wall of a cavity of a concrete test piece for 3 times, extruding the uniformly stirred two-component modified silicone adhesive into the cavity to prepare a test piece, curing for 14 days according to the method A of GB/T13477.8-2002 tensile cohesiveness test, then wiping with a water pen drawing 3 lines of 1-2cm, and wiping with a wet towel, wherein if the test piece is wiped cleanly after 1-2 times, the stain resistance is excellent, if the test piece is wiped cleanly after 3-4 times, the stain resistance is general, and if the test piece is not wiped cleanly after 4 times, the stain resistance is poor.
The test results are shown in Table 1.
TABLE 1
The test piece is stretched to be damaged and generally classified into adhesive damage or cohesive damage according to the damage condition, wherein the cohesive damage is damaged from the inside of the colloid, which shows that the adhesive force of the adhesive to the concrete is good, namely the applicability of the primer to the adhesive is good; this is a poor adhesion of gelatin to concrete, i.e. the glue breaks at the interface of the glue and the concrete.
From the test results, the primer prepared from the polyurethane prepolymer without the treating agent is not suitable for the two-component modified silicone sealant, has limited effect on improving the bonding force between the two-component modified silicone sealant and a concrete base material, and cannot meet the standard requirement. The base coating liquid has excellent applicability to the modified silicone sealant for the fabricated building, after the base coating liquid is treated, the sealant has excellent bonding force to a concrete base material, the bonding property of the sealant can be still maintained after the sealant is soaked in water for a long time, the stain resistance of the sealant is excellent, the base coating curing speed is high, and the sealant beating operation is not delayed.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The modified silicone sealant priming solution for the fabricated building is characterized by comprising the following components in percentage by weight:
a polyurethane prepolymer A;
silane modified isocyanate prepolymer B;
0.5-2% of ethyl orthosilicate;
0.1-1.5% of a silane coupling agent;
0.05-0.2% of a tin catalyst;
0.02-0.1% of amine catalyst;
48-68% of a solvent;
wherein the polyurethane prepolymer A is prepared by reacting diphenylmethane diisocyanate with a polyhydroxy compound; the weight ratio of the polyurethane prepolymer A to the silane modified isocyanate prepolymer B is 1: 1-3: 1, and the polyurethane prepolymer A and the silane modified isocyanate prepolymer B account for 30-50% of the total weight;
the silane modified isocyanate prepolymer B is prepared by the following method: putting silane and an isocyanate monomer into a reaction kettle, reacting for 3-5 hours at 40-70 ℃ until the mass fraction of residual NCO is 3-6%, cooling and discharging, wherein the molar ratio of active hydrogen in the silane to isocyanate in the isocyanate monomer is 1:1.2 to 1.5.
2. The assembly type modified silicone sealant primer for building according to claim 1, wherein the polyurethane prepolymer A is prepared by the following method: heating a polyhydroxy compound to 120 ℃, dehydrating in vacuum for 3-4 h, keeping the vacuum degree, cooling to 50-80 ℃, adding diphenylmethane diisocyanate under the protection of nitrogen, reacting for 2-4 h until the mass fraction of residual NCO is 3-6%, cooling and discharging, wherein the molar ratio of hydroxyl in the polyhydroxy compound to isocyanato in the diphenylmethane diisocyanate is 1:1.5 to 2.1.
3. The assembly building modified silicone sealant primer according to claim 1, wherein the polyol is one or more of polyoxypropylene glycol, polyoxypropylene triol, polytetrahydrofuran glycol, polyethylene glycol adipate glycol, polyhexamethylene glycol adipate-propylene glycol adipate glycol, poly epsilon-caprolactone glycol, castor oil, and polyethylene glycol adipate glycol.
4. The assembly type modified silicone sealant primer solution for building of claim 1, wherein the isocyanate monomer is one or more of diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, and polymethylene polyphenyl polyisocyanate.
5. The assembly building modified silicone sealant primer according to claim 1, wherein the silane is one or more of 3-mercaptopropyltrimethoxysilane, gamma- (2, 3-glycidoxy) propyltrimethoxysilane and bis (gamma-trimethoxysilylpropyl) amine.
6. The assembly building modified silicone sealant primer according to claim 1, wherein the tin catalyst is one or more of dibutyltin dilaurate, dibutyltin diacetate, stannous octoate, dibutyltin bis (dodecyl sulfur).
7. The assembly building modified silicone sealant primer according to claim 1, wherein the amine catalyst is one or more of N, N-dimethylcyclohexylamine, bis (2-dimethylaminoethyl) ether, N '-tetramethylalkylenediamine, triethylamine, N-dimethylbenzylamine, N-ethylmorpholine, N' -diethylpiperazine, triethanolamine, and DMEA.
8. The assembly type modified silicone sealant primer for building according to claim 1, wherein the silane coupling agent is one or more of γ - (2, 3-epoxypropoxy) propyltrimethoxysilane, N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane, γ -aminopropyltriethoxysilane, and 3-aminopropyltrimethoxysilane.
9. The preparation method of the assembly type construction modified silicone sealant primer solution as set forth in any one of claims 1 to 8, characterized by comprising the steps of: and (3) mixing the polyurethane prepolymer A with the silane modified isocyanate prepolymer B, adding a solvent, uniformly mixing, adding tetraethoxysilane, a silane coupling agent, a tin catalyst and an amine catalyst, uniformly stirring, discharging, sealing and storing.
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| CN112225870A (en) * | 2020-10-15 | 2021-01-15 | 北京理工大学 | A kind of preparation method of bonding-free polyurethane liner |
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| CN104861920A (en) * | 2014-11-22 | 2015-08-26 | 湖北回天新材料股份有限公司 | Monocomponent polyurethane sealant with high temperature resistance and water resistance and preparation method therefor |
| CN105086914A (en) * | 2015-08-28 | 2015-11-25 | 上海蒂姆新材料科技有限公司 | One-component polyurethane sealing glue applicable to metal bonding and preparing method of one-component polyurethane sealing glue |
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