CN111518466A - Primer matched with MS sealant, preparation method and application thereof - Google Patents
Primer matched with MS sealant, preparation method and application thereof Download PDFInfo
- Publication number
- CN111518466A CN111518466A CN202010381393.0A CN202010381393A CN111518466A CN 111518466 A CN111518466 A CN 111518466A CN 202010381393 A CN202010381393 A CN 202010381393A CN 111518466 A CN111518466 A CN 111518466A
- Authority
- CN
- China
- Prior art keywords
- sealant
- parts
- primer
- coupling agent
- gamma
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C09D175/06—Polyurethanes from polyesters
-
- 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
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
- C08G18/289—Compounds containing at least one heteroatom other than oxygen or nitrogen containing silicon
-
- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
-
- 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
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a primer matched with MS sealant, which comprises 20-60 parts of silane modified polyurethane prepolymer; 1-5 parts of silane functional stabilizer; 0.1-1.5 parts of epoxy silane coupling agent; 0.1-1.5 parts of aminosilane coupling agent; 0.05-1.5 parts of a catalyst; 40-70 parts of organic solvent. The silane functional stabilizer is introduced into the primer, so that the bridging effect between the primer and the assembly type building base surface can be improved, the crosslinking and complexing effect between the primer and MS sealant can also be improved, the storage stability is improved, and the primer still has excellent compatibility, permeability, water resistance and operability after being sealed and stored at room temperature for 9 months. After being treated by the primer, the sealant can be quickly immersed in concrete to form a compact barrier film, plays a role in blocking porous concrete, obviously improves the adhesion of the sealant and a concrete base material, also obviously improves the water resistance of MS sealant, improves the sealing and waterproof effects of an assembly type building, and prolongs the service life of the building.
Description
Technical Field
The invention belongs to the technical field of sealants, and relates to a primer coating matched with a sealant, in particular to a primer coating matched with MS sealant, a preparation method and application thereof.
Background
The fabricated building has the advantages of energy saving, material saving, shortened construction period, environmental protection and the like, and the fabricated building is prevalent in the Japanese building industry in the 60 th century, so far, the fabricated building occupies the half-wall Jiangshan of the Japanese building market. The assembly type building adopts a factory-prefabricated field assembly mode, 2-3 cm wide assembly joints can be reserved in the assembly process, the assembly joints need to be filled with sealant with excellent performance, the traditional silicone sealant, polyurethane sealant and MS sealant are used for the assembly type building at present, and the traditional silicone sealant has high modulus and poor stain resistance; the polyurethane sealant has poor weather resistance and is easy to crack; the MS sealant has the advantages of both silicone sealant and polyurethane sealant, and has the advantages of good adhesion, weather resistance, flexibility, coating property and the like.
The MS polymer is a cross-linked polymer based on silane-terminated polyether, does not contain silicone components and solvents, does not contain polyurethane groups, is tasteless and environment-friendly in most formulas, has the inherent elasticity of MS adhesives and sealants, can absorb and compensate dynamic loads, uniformly transmits stress, prevents premature fatigue of materials, and can realize bonding among various base materials.
Although the MS sealant has the advantages of both the silicone sealant and the polyurethane sealant, has good adhesion, weather resistance, flexibility, coating property and the like, the service life of the fabricated building can be shortened due to the following factors: 1) the assembly member for the assembly type building completes the processing of the prefabricated reinforced concrete member in a factory, so that a layer of release agent is usually coated on the inner surface of a mould in order to facilitate the demoulding and forming of the prefabricated reinforced concrete member, and the existence of the release agent during the assembly can influence the adhesiveness of MS sealant; 2) in order to protect the surface of the component, the surface of the component is generally coated with a surface treatment agent, and the surface treatment agent also influences the adhesiveness of the sealant; 3) the prefabricated reinforced concrete member belongs to porous building materials, and when the sealing and waterproof performance of the splicing seams is not enough, water can slowly permeate to the bonding surface of the sealant and the member after soaking, so that the bonding property of the sealant is influenced.
The use of the primer can solve the problem that the splicing seam has insufficient waterproofness due to the failure of the adhesive property after the sealant is used for a period of time, so that the service life of the assembly type building is directly influenced by the quality of the primer. The primer is required to be cured at room temperature, has good permeability and good application property, has good compatibility with silane modified sealant, and can effectively enhance the adhesion between the sealant and a concrete base surface. Tests prove that the primer prepared from the conventional polyurethane prepolymer is poor in compatibility with MS sealant and storage stability, and precipitates, viscosity is increased and even gels can appear after the primer is stored at room temperature for 2-3 months in a sealed manner. Therefore, a primer with good compatibility with MS sealant, good permeability and good storage stability is particularly needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the base coating agent for matching the MS sealant, which is suitable for base coating of the MS sealant for the fabricated building, has good compatibility with the MS sealant, good permeability, good water resistance, good storage stability and convenient use, can obviously improve the adhesion and water resistance of the MS sealant and a concrete substrate, and improves the sealing waterproof life of the fabricated building.
The first purpose of the invention is to provide a primer matched with MS sealant. In order to achieve the purpose, the invention provides the following technical scheme:
the primer matched with the MS sealant comprises the following components in parts by weight:
20-60 parts of silane modified polyurethane prepolymer;
1-5 parts of silane functional stabilizer;
0.1-1.5 parts of epoxy silane coupling agent;
0.1-1.5 parts of aminosilane coupling agent;
0.05-1.5 parts of a catalyst;
40-70 parts of an organic solvent;
wherein the silane modified polyurethane prepolymer comprises the following components:
two isomers of 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate;
a hydroxyl terminated compound;
an aminosilane coupling agent;
the silane functional stabilizer comprises the following components in parts by mole:
1 part of amino silane coupling agent;
1 to 1.5 parts of epoxy silane coupling agent
The components of the aminosilane coupling agent in the primer, the silane modified polyurethane prepolymer and the silane functional stabilizer matched with the MS sealant can be the same or different;
the epoxy silane coupling agent can be the same or different in components of a primer and a silane functional stabilizer matched with the MS sealant.
The base coating agent suitable for the MS sealant is prepared by performing silane modification on a polyurethane prepolymer, synthesizing a proper silane functional stabilizer, adding a solvent, an aminosilane coupling agent, an epoxy silane coupling agent and a catalyst, and adjusting the proportion of the components.
Preferably, the epoxysilane coupling agent is one or more of gamma-glycidoxypropyltrimethoxysilane, gamma-glycidoxypropyltriethoxysilane, gamma-glycidoxypropylmethyldimethoxysilane, gamma-glycidoxypropylmethyldiethoxysilane, beta- (3,4 epoxycyclohexyl) -ethyltrimethoxysilane, beta- (3,4 epoxycyclohexyl) -ethyltriethoxysilane, and 3- (2, 3-epoxypropyl) propyltrimethoxysilane. Further, gamma-glycidoxypropyltrimethoxysilane, gamma-glycidoxypropylmethyldimethoxysilane, beta- (3, 4-epoxycyclohexyl) -ethyltrimethoxysilane and 3- (2, 3-epoxypropyl) propyltrimethoxysilane are preferable.
Preferably, the aminosilane coupling agent is one or more of gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltriethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane and N-beta- (aminoethyl) -gamma-aminopropylmethyldiethoxysilane. Still further, one or more of gamma-aminopropyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane and N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane are preferable.
Preferably, the catalyst is one or more of dibutyltin dilaurate, dibutyltin diacetate, stannous octoate, dibutyltin bis (dodecyl sulfur), ethyl titanate, isobutyl titanate, isopropyl titanate, dialkoxy titanium bis (beta-diketonate) complex and titanium dioxide glycol (beta-diketonate) complex. Further, dibutyltin dilaurate, stannous octoate, ethyl titanate, isobutyl titanate and isopropyl titanate are preferable.
Preferably, the organic solvent is one or more of toluene, xylene, trimethylbenzene, ethyl acetate, butyl acetate and butanone. Further, xylene, trimethylbenzene and ethyl acetate are preferable.
Preferably, the hydroxyl-terminated compound is one or more of poly 1, 4-butanediol adipate diol, poly ethylene glycol adipate diol, poly propylene oxide homopolyether polyol, poly ethylene oxide homopolyether polyol, THF-propylene oxide copolyether polyol. Further, one or more of polyethylene glycol adipate glycol, polyethylene oxide homopolyether polyol and THF-homopolyether polyol are preferable.
The silane modified polyurethane prepolymer is prepared by the following method:
heating a hydroxyl-terminated compound to 120 ℃ in a reaction kettle, dehydrating for 2-3 h in vacuum, keeping the vacuum degree, cooling to 70-85 ℃, adding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate under the protection of nitrogen, reacting for 2-3 h until the mass fraction of the residual NCO is 2.5-5%, dropwise adding an excessive aminosilane coupling agent step by step, reacting for 1-4 h, cooling and discharging, wherein the molar ratio of amino to the residual NCO in the aminosilane coupling agent is 1-2: 1.
The silane functional stabilizer is prepared by the following method:
and adding the epoxy silane coupling agent into a reaction kettle to 70-85 ℃, gradually dropwise adding the aminosilane coupling agent, reacting for 2-6 hours after dropwise adding, cooling and discharging.
The invention also provides a preparation method of the primer matched with the MS sealant, which comprises the following steps:
mixing the silane modified polyurethane prepolymer with an organic solvent, adding a silane functional stabilizer, an aminosilane coupling agent, an epoxy silane coupling agent and a catalyst, uniformly stirring, discharging, sealing and storing.
The invention also provides application of the primer matched with the MS sealant in the field of fabricated buildings, and the primer matched with the MS sealant is compatible with the MS sealant for use.
The MS sealant comprises the following components in parts by weight:
20-50 parts of basic MS resin; 20-50 parts of a plasticizer; 50-150 parts of inorganic filler; 3-10 parts of a thixotropic agent; 2-8 parts of a weather resisting agent; 1-5 parts of a water-resistant adhesive; 0.05-1.0 part of catalyst; 0.5-3 parts of a special color master batch for MS sealant;
the waterproof adhesive comprises the following components in parts by mole:
1 part of trifunctional aminosilane coupling agent; 1 part of bifunctional aminosilane coupling agent; 1-3 parts of trifunctional epoxy silane coupling agent.
The invention has the following advantages and beneficial effects:
1. the base coating matched with the MS sealant has excellent compatibility with the MS sealant for the fabricated building, can be quickly immersed into concrete to form a compact barrier film after being treated by the base coating, plays a role in plugging porous concrete, remarkably improves the adhesion of the sealant and a concrete base material, also remarkably improves the water resistance of the MS sealant, improves the sealing and waterproof effects of the fabricated building and prolongs the service life of the building. After the primer is coated, the sealant can still keep good adhesion to a concrete substrate after being soaked in water for 14 days, and exceeds the test specification of soaking for 4 days in the related standard.
2. The silane functional stabilizer is introduced into the primer, so that the bridging effect between the primer and the assembly type building base surface can be improved, the crosslinking and complexing effect between the primer and MS sealant can also be improved, the storage stability is improved, and the primer still has excellent compatibility, permeability, water resistance and operability after being sealed and stored at room temperature for 9 months.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation of the primer matched with the MS sealant comprises the following steps:
preparing a silane modified polyurethane prepolymer:
200g of polyethylene glycol adipate glycol with the molecular weight of 1000 is dehydrated in vacuum at 120 ℃ for 2h, then nitrogen is introduced to reduce the temperature to 75 ℃, 49.5g of two isomers of 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate are added at the temperature, the mixture is stirred and reacted for 2.5h under the condition of heat preservation until the NCO content of the final product reaches 2.8 percent, 32.8g of gamma-aminopropyltrimethoxysilane is gradually dripped, the dripping is ensured to be finished within 0.5h, the reaction is carried out for 2h under the condition of heat preservation, and the mixture is cooled, discharged and sealed for storage.
Preparation of silane functional stabilizer:
118g of gamma-glycidoxypropyltrimethoxysilane is put into a reaction kettle, 59g of gamma-aminopropyltrimethoxysilane is gradually dripped when the temperature is raised to 80 ℃, 30g of gamma-aminopropylmethyldimethoxysilane is gradually dripped, the reaction is kept for 2 hours after the reaction is finished, and the reaction product is cooled, discharged, sealed and stored.
Preparing a primer matched with MS sealant:
putting 100g of silane modified polyurethane prepolymer into a reaction kettle, adding 100g of ethyl acetate, stirring for 10min, adding 2g of silane functional stabilizer, stirring for 10min, finally adding 0.5g of gamma-aminopropyltrimethoxysilane, 0.5g of gamma-glycidoxypropyltrimethoxysilane and 0.2g of dibutyltin dilaurate, and stirring uniformly to obtain the primer matched with the MS sealant.
Example 2
The preparation of the primer matched with the MS sealant comprises the following steps: the preparation processes of the silane-modified polyurethane prepolymer and the silane functional stabilizer are the same as those in example 1. Putting 100g of silane modified polyurethane prepolymer into a reaction kettle, adding 100g of ethyl acetate, stirring for 10min, adding 5g of silane functional stabilizer, stirring for 10min, finally adding 0.5g of gamma-aminopropyltrimethoxysilane, 0.5g of gamma-glycidoxypropyltrimethoxysilane and 0.2g of dibutyltin dilaurate, and stirring uniformly to obtain the primer matched with the MS sealant for the fabricated building.
Example 3
The preparation of the primer matched with the MS sealant comprises the following steps: the preparation processes of the silane-modified polyurethane prepolymer and the silane functional stabilizer are the same as those in example 1. Putting 100g of silane modified polyurethane prepolymer into a reaction kettle, adding 100g of ethyl acetate, stirring for 10min, adding 5g of silane functional stabilizer, stirring for 10min, finally adding 0.5g of N-beta- (aminoethyl) -gamma-aminopropyl methyl trimethoxy silane, 0.5g of gamma-glycidoxypropyl trimethoxy silane and 0.1g of dibutyltin dilaurate, and stirring uniformly to obtain the primer matched with the MS sealant for the prefabricated building.
Example 4
The preparation of the primer matched with the MS sealant comprises the following steps: the preparation processes of the silane-modified polyurethane prepolymer and the silane functional stabilizer are the same as those in example 1. Putting 100g of silane modified polyurethane prepolymer into a reaction kettle, adding 120g of dimethylbenzene, stirring for 10min, adding 3g of silane functional stabilizer, stirring for 10min, finally adding 0.5g of N-beta- (aminoethyl) -gamma-aminopropyl methyl trimethoxy silane, 0.5g of gamma-glycidyl ether oxypropyl trimethoxy silane and 1.2g of isopropyl titanate, and stirring uniformly to obtain the primer matched with the MS sealant for the prefabricated building.
Example 5
The preparation of the primer matched with the MS sealant comprises the following steps: the preparation processes of the silane-modified polyurethane prepolymer and the silane functional stabilizer are the same as those in example 1. Putting 100g of silane modified polyurethane prepolymer into a reaction kettle, adding 100g of ethyl acetate, stirring for 10min, adding 2g of silane functional stabilizer, stirring for 10min, finally adding 0.5g of gamma-aminopropyltrimethoxysilane, 0.5g of beta- (3, 4-epoxycyclohexyl) -ethyltrimethoxysilane and 0.2g of dibutyltin dilaurate, and stirring uniformly to obtain the primer matched with the MS sealant for the fabricated building.
Example 6
The preparation of the primer matched with the MS sealant comprises the following steps: the silane functional stabilizer was prepared by the same procedure as in example 1. The preparation process of the silane modified polyurethane prepolymer comprises the following steps: 200g of polyethylene oxide homopolyether polyol with the molecular weight of 1000 is dehydrated for 2h under vacuum at 120 ℃, nitrogen is introduced to reduce the temperature to 75 ℃, 56.5g of two isomers of 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate are added under the temperature, the mixture is stirred and reacted for 2.5h under heat preservation until the NCO content of the final product reaches 4 percent, 49.5g of gamma-aminopropyltrimethoxysilane is gradually dripped, the dripping is ensured to be finished within 0.5h, the mixture is reacted for 2h under heat preservation, cooled, discharged and sealed for storage. The other components of the primer for MS sealant were the same as those in example 1.
Example 7
The preparation of the primer matched with the MS sealant comprises the following steps: the silane-modified polyurethane prepolymer of example 1 was the same. The silane functional stabilizer is prepared by the following steps: 118g of gamma-glycidoxypropyltrimethoxysilane is put into a reaction kettle, 36.5g of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane is gradually dripped when the temperature is raised to 80 ℃, 21g of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane is gradually dripped, the reaction is carried out for 2h after the reaction is finished, and the reaction product is cooled, discharged and sealed for storage. The other components of the primer for MS sealant were the same as those in example 1.
Example 8 comparative example
Comparative example 1:
and (4) directly gluing the concrete test block after cleaning without brushing a primer to prepare a test piece for maintenance.
Comparative example 2:
a primer having a composition substantially similar to that of example 1 except that in comparative example 2, a low viscosity polyurethane prepolymer was used instead of the silane-modified polyurethane prepolymer.
The preparation method of the low-viscosity polyurethane prepolymer comprises the following steps: putting 18 parts of polyether triol with the molecular weight of 500 and 12 parts of butyl acetate into a reactor, adding 30 parts of diphenylmethane-4, 4' -diisocyanate, fully mixing, reacting at 82 ℃ for 3.5 hours, and testing the NCO content to be 9.8 percent to obtain a low-viscosity polyurethane prepolymer; in the comparative example 2, silane chain extender is used to replace silane functional stabilizer, 6 parts of gamma-glycidoxypropyltrimethoxysilane and 21 parts of butyl acetate are added into a reactor, 3.6 parts of diethanolamine is slowly dripped at the temperature of 80 ℃, and then the silane chain extender is prepared after heat preservation reaction for 3 hours. And mixing the low-viscosity polyurethane prepolymer 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 stirring uniformly to obtain the primer.
Comparative example 3:
a primer, the composition of which is substantially similar to that of example 1, except that in comparative example 3, a silane-modified isocyanate prepolymer is used instead of the silane functional stabilizer in example 1, and a polyurethane prepolymer is used instead of the silane-modified polyurethane prepolymer in example 1, and the preparation method of the polyurethane prepolymer is the same as that in comparative example 2.
The silane modified isocyanate prepolymer is prepared by the following method: 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 and the silane modified isocyanate prepolymer 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 9 testing
The primers obtained in examples 1 to 7 and comparative examples 1 to 3 in example 8 were coated on a standard concrete block and tested for permeability and water resistance, according to the following test methods or standards:
(1) permeability test: brushing the base coating agent on the test block, starting timing until no liquid base coating agent exists on the surface of the test block, and recording the soaking time;
(2) and (3) testing a water resistance test: brushing and coating the bonding surface of the test piece with a primer, extruding the single-component MS sealant into the cavity according to the standard GB/T13477.11-2017 to prepare the test piece, curing for 28 days according to the A method, immersing the test piece in distilled water for 14 days, taking out the test piece, airing the test piece for 1 day under the standard condition, and testing the fixed-extension bonding property.
The primer was stored in a sealed condition at room temperature for 9 months, and the storage stability was characterized by appearance, permeability and water resistance.
The test results are shown in Table 1.
The test results show that the primer provided by the invention has excellent compatibility with the MS sealant for the fabricated building, can be quickly immersed into concrete to form a compact barrier film after being treated by the primer, plays a role in plugging porous concrete, obviously improves the adhesion of the sealant and a concrete substrate, also obviously improves the water resistance of the MS sealant, improves the sealing and waterproof effects of the fabricated building, and prolongs the service life of the building. After the primer is coated, the sealant can still keep good adhesion to a concrete substrate after being soaked in water for 14 days, and exceeds the test specification of soaking for 4 days in the related standard.
The primer prepared from the polyurethane prepolymer has poor permeability and storage stability, gels after being stored at room temperature for 9 months in a sealing manner, and has no operability, and the primer provided by the invention has excellent compatibility, permeability, water resistance and operability after being improved and stored at room temperature for 9 months in a sealing manner.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The primer matched with the MS sealant is characterized by comprising the following components in parts by weight: the paint comprises the following components in parts by weight:
20-60 parts of silane modified polyurethane prepolymer;
1-5 parts of silane functional stabilizer;
0.1-1.5 parts of epoxy silane coupling agent;
0.1-1.5 parts of aminosilane coupling agent;
0.05-1.5 parts of a catalyst;
40-70 parts of an organic solvent;
wherein the silane modified polyurethane prepolymer comprises the following components:
two isomers of 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate;
a hydroxyl terminated compound;
an aminosilane coupling agent;
the silane functional stabilizer comprises the following components in parts by mole:
1 part of amino silane coupling agent;
1-1.5 parts of epoxy silane coupling agent.
2. The primer coating for MS sealant matching according to claim 1, characterized in that: the epoxy silane coupling agent is one or more of gamma-glycidoxypropyltrimethoxysilane, gamma-glycidoxypropyltriethoxysilane, gamma-glycidoxypropylmethyldimethoxysilane, gamma-glycidoxypropylmethyldiethoxysilane, beta- (3,4 epoxycyclohexyl) -ethyltrimethoxysilane, beta- (3,4 epoxycyclohexyl) -ethyltriethoxysilane and 3- (2, 3-epoxypropyl) propyltrimethoxysilane.
3. The primer coating for MS sealant matching according to claim 1, characterized in that: the aminosilane coupling agent is one or more of gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltriethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane and N-beta- (aminoethyl) -gamma-aminopropylmethyldiethoxysilane.
4. The primer coating for MS sealant matching according to claim 1, characterized in that: the catalyst is one or more of dibutyltin dilaurate, dibutyltin diacetate, stannous octoate, dibutyltin bis (dodecyl sulfur), ethyl titanate, isobutyl titanate, isopropyl titanate, dialkoxy titanium bis (beta-diketone ester) complex and titanic acid dihydric alcohol (beta-diketone ester) complex.
5. The primer coating for MS sealant matching according to claim 1, characterized in that: the organic solvent is one or more of toluene, xylene, trimethylbenzene, ethyl acetate, butyl acetate and butanone.
6. The primer coating for MS sealant matching according to claim 1, characterized in that: the hydroxyl-terminated compound is one or more of poly 1, 4-butanediol adipate diol, poly ethylene glycol adipate diol, poly propylene oxide homopolyether polyol, poly ethylene oxide homopolyether polyol, THF-homopolyether polyol and THF-propylene oxide copolyether polyol.
7. The primer coating for MS sealant matching according to claim 1, characterized in that: the silane modified polyurethane prepolymer is prepared by the following method:
heating a hydroxyl-terminated compound to 120 ℃ in a reaction kettle, dehydrating for 2-3 h in vacuum, keeping the vacuum degree, cooling to 70-85 ℃, adding 2, 4-toluene diisocyanate and 2, 6-toluene diisocyanate under the protection of nitrogen, reacting for 2-3 h until the mass fraction of the residual NCO is 2.5-5%, dropwise adding an excessive aminosilane coupling agent step by step, reacting for 1-4 h, cooling and discharging, wherein the molar ratio of amino to the residual NCO in the aminosilane coupling agent is 1-2: 1.
8. The primer coating for MS sealant matching according to claim 1, characterized in that: the silane functional stabilizer is prepared by the following method: and adding the epoxy silane coupling agent into a reaction kettle to 70-85 ℃, gradually dropwise adding the aminosilane coupling agent, reacting for 2-6 hours after dropwise adding, cooling and discharging.
9. The preparation method of the primer for MS sealant matching according to claims 1-8 is characterized by comprising the following steps:
mixing the silane modified polyurethane prepolymer with an organic solvent, adding a silane functional stabilizer, an aminosilane coupling agent, an epoxy silane coupling agent and a catalyst, uniformly stirring, discharging, sealing and storing.
10. The application of the primer for matching MS sealant obtained by the preparation method according to claim 9 in the field of fabricated buildings is characterized in that: the primer matched with the MS sealant is compatible with the MS sealant for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010381393.0A CN111518466B (en) | 2020-05-08 | 2020-05-08 | Primer matched with MS sealant, preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010381393.0A CN111518466B (en) | 2020-05-08 | 2020-05-08 | Primer matched with MS sealant, preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111518466A true CN111518466A (en) | 2020-08-11 |
| CN111518466B CN111518466B (en) | 2022-03-18 |
Family
ID=71905152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010381393.0A Active CN111518466B (en) | 2020-05-08 | 2020-05-08 | Primer matched with MS sealant, preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111518466B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112646462A (en) * | 2020-12-16 | 2021-04-13 | 大禹伟业(北京)国际科技有限公司 | Special base coat for silane modified polyether sealant and preparation method and application thereof |
| CN112724847A (en) * | 2020-12-14 | 2021-04-30 | 苏州市雄林新材料科技有限公司 | High-low temperature composite film and preparation method thereof |
| CN114716864A (en) * | 2022-04-01 | 2022-07-08 | 青岛爱尔家佳新材料股份有限公司 | Single-component solvent-free polyurea primer containing modified multi-silane compound and preparation method thereof |
| CN116875174A (en) * | 2023-08-08 | 2023-10-13 | 河北宇阳泽丽防水材料有限公司 | Silane modified polyurethane waterproof coating and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102516921A (en) * | 2011-12-09 | 2012-06-27 | 山东北方现代化学工业有限公司 | Silane modified polyurethane glass primer and preparation method thereof |
| CN105176439A (en) * | 2015-08-28 | 2015-12-23 | 上海蒂姆新材料科技有限公司 | Adhesive used adhesion promoter, and synthetic method and applications thereof |
| CN106752838A (en) * | 2016-12-23 | 2017-05-31 | 山东北方现代化学工业有限公司 | A kind of polyurethane sealant silane coupling agent and preparation method thereof |
| CN106883771A (en) * | 2017-03-10 | 2017-06-23 | 北京东方雨虹防水技术股份有限公司 | A kind of bi-component modified silicone seal gum and preparation method thereof |
| CN108178978A (en) * | 2017-12-27 | 2018-06-19 | 科顺防水科技股份有限公司 | Modified silicone seal gum silane coupling agent and preparation method thereof |
| CN108753135A (en) * | 2018-05-24 | 2018-11-06 | 林荣铨 | A kind of polyurethane sealant primary coat liquid and the preparation method and application thereof |
-
2020
- 2020-05-08 CN CN202010381393.0A patent/CN111518466B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102516921A (en) * | 2011-12-09 | 2012-06-27 | 山东北方现代化学工业有限公司 | Silane modified polyurethane glass primer and preparation method thereof |
| CN105176439A (en) * | 2015-08-28 | 2015-12-23 | 上海蒂姆新材料科技有限公司 | Adhesive used adhesion promoter, and synthetic method and applications thereof |
| CN106752838A (en) * | 2016-12-23 | 2017-05-31 | 山东北方现代化学工业有限公司 | A kind of polyurethane sealant silane coupling agent and preparation method thereof |
| CN106883771A (en) * | 2017-03-10 | 2017-06-23 | 北京东方雨虹防水技术股份有限公司 | A kind of bi-component modified silicone seal gum and preparation method thereof |
| CN108178978A (en) * | 2017-12-27 | 2018-06-19 | 科顺防水科技股份有限公司 | Modified silicone seal gum silane coupling agent and preparation method thereof |
| CN108753135A (en) * | 2018-05-24 | 2018-11-06 | 林荣铨 | A kind of polyurethane sealant primary coat liquid and the preparation method and application thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112724847A (en) * | 2020-12-14 | 2021-04-30 | 苏州市雄林新材料科技有限公司 | High-low temperature composite film and preparation method thereof |
| CN112646462A (en) * | 2020-12-16 | 2021-04-13 | 大禹伟业(北京)国际科技有限公司 | Special base coat for silane modified polyether sealant and preparation method and application thereof |
| CN114716864A (en) * | 2022-04-01 | 2022-07-08 | 青岛爱尔家佳新材料股份有限公司 | Single-component solvent-free polyurea primer containing modified multi-silane compound and preparation method thereof |
| CN116875174A (en) * | 2023-08-08 | 2023-10-13 | 河北宇阳泽丽防水材料有限公司 | Silane modified polyurethane waterproof coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111518466B (en) | 2022-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111518466B (en) | Primer matched with MS sealant, preparation method and application thereof | |
| CN111019582B (en) | Reactive polyurethane hot melt adhesive for household appliance sealing and preparation method thereof | |
| CN107841277B (en) | Preparation method of fast-curing and high-strength single-component silane modified polyurethane sealant | |
| EP1544225B1 (en) | Two-component silylated polyurethane adhesive, sealant, and coating compositions | |
| RU2367670C2 (en) | Polyurethanes with end silane groups | |
| CA2505177C (en) | Moisture-curable, polyether urethanes and their use in sealant, adhesive and coating compositions | |
| CN108047923B (en) | Modified silicone sealant primer for fabricated building and preparation method thereof | |
| CN109233731B (en) | Reactive hot-melt adhesive composition and preparation method and application thereof | |
| CN111454683B (en) | High-water-resistance low-modulus single-component MS sealant, preparation method and application thereof | |
| CN111073575A (en) | Single-component silane modified polyether sealant for prefabricated building and preparation method thereof | |
| CN101818040A (en) | Fast-curing one-component polyurethane sealant and preparation method thereof | |
| CN111574951B (en) | Self-skinning modified polyurethane thermosetting sealant composition and preparation method thereof | |
| CN108913007B (en) | Synthetic method of anti-oil stain primer resin for oil stain concrete ground | |
| CN108178978B (en) | Primer for modified silicone sealant and preparation method thereof | |
| CN113549391B (en) | Single-component polyurethane waterproof coating and preparation method thereof | |
| CN110922930A (en) | Primer-free single-component polyurethane windshield glass adhesive and preparation method thereof | |
| CN110760264A (en) | Asphalt polyurethane waterproof coating suitable for cement base layer and preparation method and application thereof | |
| CN113980563B (en) | Method for preparing one-component semi-polyurea waterproof coating composition and one-component semi-polyurea waterproof coating composition | |
| CN108587550B (en) | Double-component solvent-free reaction type polyurethane hot melt adhesive applied to automobile industry and application method thereof | |
| CN113527629B (en) | Modified polyether resin for high-weather-resistance high-performance building outer wall and sealant | |
| CN115386291B (en) | Single-component polyurethane waterproof coating and preparation method thereof | |
| CN114292574B (en) | Single-component polyurethane waterproof paint and preparation method thereof | |
| CN113337197B (en) | Sealing rubber primer coating liquid and preparation method thereof | |
| CN115785850A (en) | Tackifying promoter, preparation method and application thereof, waterproof bonding single-component polyurethane sealant, preparation method and application thereof | |
| CN110951381B (en) | High-weather-resistance exposed single-component polyurethane waterproof coating and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Group 6, Juntian village, Qingliu Town, Xindu District, Chengdu, Sichuan 610000 Applicant after: Sichuan Weidun ingenuity Construction Co.,Ltd. Address before: Group 6, Juntian village, Qingliu Town, Xindu District, Chengdu, Sichuan 610000 Applicant before: SICHUAN HONGYUAN WATERPROOF PROJECT Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |