CN113956831B - Bridge expansion joint protection adhesive with shape self-adaptability - Google Patents
Bridge expansion joint protection adhesive with shape self-adaptability Download PDFInfo
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- CN113956831B CN113956831B CN202111354199.4A CN202111354199A CN113956831B CN 113956831 B CN113956831 B CN 113956831B CN 202111354199 A CN202111354199 A CN 202111354199A CN 113956831 B CN113956831 B CN 113956831B
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- 239000000853 adhesive Substances 0.000 title abstract description 22
- 230000001070 adhesive effect Effects 0.000 title abstract description 22
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 40
- 239000000203 mixture Substances 0.000 claims abstract description 32
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 26
- 229920000570 polyether Polymers 0.000 claims abstract description 26
- 239000004014 plasticizer Substances 0.000 claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 16
- KUCOHFSKRZZVRO-UHFFFAOYSA-N terephthalaldehyde Chemical compound O=CC1=CC=C(C=O)C=C1 KUCOHFSKRZZVRO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 150000001412 amines Chemical class 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 8
- 239000013530 defoamer Substances 0.000 claims abstract description 6
- 239000002516 radical scavenger Substances 0.000 claims abstract description 6
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- PYOKUURKVVELLB-UHFFFAOYSA-N trimethyl orthoformate Chemical group COC(OC)OC PYOKUURKVVELLB-UHFFFAOYSA-N 0.000 claims description 18
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 15
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 15
- 239000002202 Polyethylene glycol Substances 0.000 claims description 14
- 229920001223 polyethylene glycol Polymers 0.000 claims description 14
- 229920005862 polyol Polymers 0.000 claims description 14
- 150000003077 polyols Chemical class 0.000 claims description 14
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 12
- 229910021485 fumed silica Inorganic materials 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- 239000002274 desiccant Substances 0.000 claims description 7
- 239000005056 polyisocyanate Substances 0.000 claims description 7
- 229920001228 polyisocyanate Polymers 0.000 claims description 7
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 6
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 6
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 6
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 6
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 6
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 6
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 6
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 5
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 229940008841 1,6-hexamethylene diisocyanate Drugs 0.000 claims description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 4
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 4
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 4
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 2
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 24
- 229920001971 elastomer Polymers 0.000 abstract description 5
- 238000005215 recombination Methods 0.000 abstract description 5
- 239000000806 elastomer Substances 0.000 abstract description 4
- 230000002441 reversible effect Effects 0.000 abstract description 4
- 125000003277 amino group Chemical group 0.000 abstract description 3
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 abstract description 3
- 230000006798 recombination Effects 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 description 36
- 238000007789 sealing Methods 0.000 description 22
- 238000002156 mixing Methods 0.000 description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 238000001914 filtration Methods 0.000 description 7
- 229920002635 polyurethane Polymers 0.000 description 7
- 239000004814 polyurethane Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002633 protecting effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical group 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000004526 silane-modified polyether Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—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
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Polyurethanes Or Polyureas (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to a bridge expansion joint protective adhesive with shape self-adaption, which is a mixture of A, B and a component A, wherein the component A comprises the following components: 30-60 parts by mass of polyurethane prepolymer, 5-10 parts by mass of plasticizer, 1-5 parts by mass of catalyst, 1-5 parts by mass of defoamer, 0.5-2 parts by mass of water scavenger and 7-20 parts by mass of filler, wherein the component B comprises: 4-10 parts by mass of curing agent, 1-3 parts by mass of plasticizer and 0.5-1.5 parts by mass of thixotropic agent. The isocyanate group in the component A reacts with the amino group in the component B to form a cross-linked structure, thereby constructing the elastomer. In the crosslinked structure, the molecular chain has excellent flexibility, low elastic modulus, good toughness and excellent deformability. In the cross-linked network, the imine bond formed by the reaction of the terephthalaldehyde and the polyether amine has reversibility, and reversible fracture and recombination can occur, so that the elastic network has shape self-adaptability.
Description
Technical Field
The invention relates to the technical field of bridge expansion joint protection, in particular to bridge expansion joint protection adhesive with shape self-adaption.
Background
Because the concrete structure can shrink and expand due to temperature change, expansion joints are required to be arranged at intervals in bridge structure design. At present, the bridge expansion joint is generally composed of a steel structure and an elastic water stop adhesive tape, so that the tightness can be ensured, and the bridge expansion joint is durable and not easy to damage. However, in the long-term service process, a large amount of soil and sand can be brought into the expansion joint by rainwater and wheels, and hard filler is formed, so that the deformation capacity of the expansion joint is greatly reduced. Therefore, the pavement management department needs to clean the expansion joints regularly, so that a large amount of manpower and material resources are consumed, time and energy are consumed, traffic is required to be closed for a long time, and the traffic efficiency is reduced.
The expansion joint can be well solved by adopting specific materials to seal and protect, and the selection of the materials is critical. The polyurethane and organosilicon sealing material has excellent elasticity, can well play a role in sealing protection, and the lower modulus can ensure the flexibility and deformability, so that the polyurethane and organosilicon sealing material is widely used in repairing and sealing. For example, chinese patent No. CN201510081330.2 discloses an expansion joint quick repair system based on elastic concrete, which includes polyurethane elastic concrete, expansion joint elastic sealant, primer, and back cover foam rod, wherein the two-component polyurethane can be quickly cured, and the two-component polyurethane is filled in the damaged position of the expansion joint notch concrete, and has excellent durability and expansion amount; the Chinese patent with the patent number of CN202011056657.1 discloses a silane modified polyether road cold crack pouring adhesive and a preparation method thereof, which improves the elongation and the adhesive force of the crack pouring adhesive, improves the high and low temperature resistance of the crack pouring adhesive, can ensure the quality of road repair and prolongs the service life of a road; the Chinese patent No. CN201710524096.5 discloses a polyurethane joint filling adhesive capable of being constructed in a single-component and double-component mode for a ballastless track concrete expansion joint and a preparation method thereof, and the polyurethane joint filling adhesive consists of a main agent and a compounding agent, can be constructed in a single-component and double-component mode, and is low in tensile modulus after solidification, good in adhesiveness with concrete, strong in displacement resistance and good in low-temperature flexibility. However, the elastic body has obvious stress relaxation after long-term use, is difficult to recover to the initial length in summer after being stretched and lengthened in winter, and has poor shape adaptability, so that the protective rubber bulges out of the expansion joint; and under the condition of tension in winter, the bonding performance of the steel structure of the bridge expansion joint is not ideal, and the debonding of the protective adhesive and the steel interface is easy to occur, so that the protection failure is caused.
Disclosure of Invention
The invention aims to solve the technical problems that: the existing elastic caulking agent has poor shape adaptability, unsatisfactory cohesiveness to a steel structure, easy debonding and difficult sealing and protecting effects on bridge expansion joints. In order to overcome the defects in the prior art, the bridge expansion joint protective adhesive with shape self-adaptability is provided.
The technical scheme adopted by the invention is as follows: a bridge expansion joint protective adhesive with shape self-adaption, which is a mixture of A, B two components,
the component A comprises the following components: 30-60 parts by mass of polyurethane prepolymer, 5-10 parts by mass of plasticizer, 1-5 parts by mass of catalyst, 1-5 parts by mass of defoamer, 0.5-2 parts by mass of water scavenger and 7-20 parts by mass of filler,
the component B comprises the following components: 4-10 parts by mass of curing agent, 1-3 parts by mass of plasticizer and 0.5-1.5 parts by mass of thixotropic agent.
Further, the polyurethane prepolymer in the component A consists of the following components: 10-50 parts by mass of polyethylene glycol, 10-40 parts by mass of polyether polyol, 5-20 parts by mass of polyisocyanate, 0.5-1 part by mass of catalyst and 0.5-1 part by mass of accelerator.
Further, the preparation method of the curing agent in the component B comprises the following steps: 1-3 parts by mass of terephthalaldehyde, 30-60 parts by mass of polyether amine and 10-20 parts by mass of drying agent are mixed and stirred for 24 hours, and then filtered to obtain the curing agent.
Preferably, the component A comprises: 45-55 parts by mass of polyurethane prepolymer, 7-9 parts by mass of plasticizer, 2-3 parts by mass of catalyst, 2-3 parts by mass of defoamer, 0.5-1 part by mass of water scavenger and 10-15 parts by mass of filler;
preferably, the component B comprises: 5-8 parts by mass of curing agent, 1-2 parts by mass of plasticizer and 0.5-1.5 parts by mass of thixotropic agent;
preferably, the polyurethane prepolymer in the a component includes: 20-30 parts by mass of polyethylene glycol, 20-30 parts by mass of polyether polyol, 10-15 parts by mass of polyisocyanate, 0.5-0.8 part by mass of catalyst and 0.6-0.7 part by mass of accelerator;
preferably, the curing agent in the component B includes: 1-2 parts by mass of terephthalaldehyde, 30-50 parts by mass of polyether amine and 10-15 parts by mass of drying agent.
Further, the polyisocyanate in the polyurethane prepolymer is one or a mixture of two or more of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate or 1, 6-hexamethylene diisocyanate;
further, the molecular weight of polyethylene glycol in the polyurethane prepolymer is 2000-4000;
further, the molecular weight of polyether polyol in the polyurethane prepolymer is 3000-6000, and the functionality is 3;
further, the accelerator in the polyurethane prepolymer is one or a mixture of two of ethanolamine and diethanolamine;
further, the filler in the component A is one or a mixture of two or more of kaolin, calcium carbonate, montmorillonite, talcum powder, silicon micropowder and diatomite;
further, the plasticizer in the component A is one or a mixture of two or more of dibutyl phthalate, dioctyl phthalate, ethyl acetate, butyl acetate and butyl acetate;
further, the catalyst in the component A and the polyurethane prepolymer thereof is one or a mixture of two of dibutyl tin dilaurate and stannous octoate, and the selection of the catalyst of the component A and the catalyst of the component A can be consistent or inconsistent without mutual influence.
Further, the defoaming agent in the component A is one or a mixture of two or more of BYK070, BYK024 or HX-2085;
further, the water scavenger in the component A is trimethyl orthoformate;
further, the plasticizer in the component B is a mixture of chloroform and dibutyl phthalate;
further, the thixotropic agent in the component B is fumed silica;
further, the drying agent is any one of anhydrous magnesium sulfate and anhydrous calcium chloride.
When the bridge expansion joint protective adhesive with shape self-adaptability is prepared, the preparation method comprises the following steps:
step one, preparation of polyurethane prepolymer
Vacuum heating polyethylene glycol and polyether polyol to remove water, adding the water into a reaction kettle, adding the polyisocyanate, the catalyst and the accelerator in the description under the protection of nitrogen, and reacting at 60-80 ℃ for 1-3 hours to obtain polyurethane prepolymer with NCO content of 1-4%;
step two, preparation of A component
Adding a plasticizer, a defoaming agent and a filler into a vacuum reaction kettle for dewatering, then adding the polyurethane prepolymer prepared in the step one, a catalyst and a dewatering agent, mixing in a vacuum environment, and sealing and preserving to obtain a component A;
step three, preparation of curing agent
Mixing and stirring 1-3 parts by mass of terephthalaldehyde, 30-60 parts by mass of polyether amine and 10-20 parts by mass of drying agent for 24 hours, and filtering to obtain a curing agent;
step four, preparation of the component B
And (3) mixing the curing agent prepared in the step (III) with a plasticizer and a thixotropic agent, and sealing and preserving to obtain the component B.
In the component A, isocyanate group-terminated polyurethane prepolymer is obtained through the reaction of polyisocyanate groups with polyethylene glycol, polyether polyol and amino groups. And then adding the plasticizer, the defoamer and the filler into a vacuum reaction kettle for dewatering, and mixing with the polyurethane prepolymer, the catalyst and the dewatering agent to obtain the component A. In the process, the plasticizer and the filler can effectively adjust the fluidity of the component A, the foam killer can avoid the generation of bubbles, the catalyst can promote the reaction of the polyurethane prepolymer and moisture in the air to be solidified during construction, the solidification time is shortened, and the dehydrator can timely remove trace moisture entering the component A during the storage process, so that the storage stability is improved.
In the component B, firstly, an amino-terminated curing agent is formed by the reaction of terephthalaldehyde and polyetheramine, the product-water is removed by a drying agent, and then the curing agent is mixed with a plasticizer and a thixotropic agent to obtain the component B with good rheological property.
When A, B components are mixed, isocyanate groups in the component A react with amino groups in the component B to form a crosslinked structure, so that the elastomer is constructed. In the crosslinked structure, the molecular chain has excellent flexibility, low elastic modulus, good toughness and excellent deformability. In the crosslinked network, the imine bond formed by the reaction of the terephthalaldehyde and the polyetheramine has reversibility, and reversible fracture and recombination can occur, so that the elastic network has shape self-adaptability: under the long-term stretching action in winter, the molecular chain can generate certain stress relaxation through the fracture-recombination of the reversible bond, so that the elastomer adapts to the shape change of the expansion joint widening, the stretching stress applied to the bonding part is reduced, and the debonding is avoided; when the expansion joint is narrowed in summer, the elastic body is pressed, the molecular chain can be re-adapted to the narrow working condition of the expansion joint through the fracture-recombination of the reversible bond, the elastic sealing protection effect is improved on the basis of keeping elasticity.
Compared with the prior art, the invention has the following advantages:
1. the plasticizer and the filler are utilized to adjust the component A into flowable slurry, so that the slurry can be directly poured, the method is simple and quick, isocyanate groups in the component A can react with the curing agent under the action of the catalyst, an elastic crosslinking network is gradually formed, the surface drying time is short, and traffic can be quickly opened; the cured component A has excellent elasticity, can be stretched to a plurality of times, has low modulus, and can not influence the function of an expansion joint while sealing and protecting;
2. the imine bond formed by the reaction of the terephthalaldehyde and the polyetheramine has reversibility, and the molecular chain has shape self-adaptability through the rupture-recombination of the reversibility bond, so that the elastomer can adapt to the shape change of the expansion joint in winter and summer, avoid the debonding in winter and the occurrence of the adhesive swelling in summer, and promote the effect of elastic sealing protection.
Detailed Description
The following describes the embodiments of the present invention in detail, and the embodiments and specific operation procedures are given on the premise of the technical solution of the present invention, but the scope of protection of the present invention is not limited to the following embodiments.
Example 1
Step one, preparation of polyurethane prepolymer
Vacuum heating and dewatering 10 parts by mass of polyethylene glycol (Mn=2000) and 10 parts by mass of polyether polyol (Mn=3000), then adding into a reaction kettle, adding 5 parts by mass of isophorone diisocyanate, 0.5 part by mass of dibutyltin dilaurate and 0.5 part by mass of ethanolamine under the protection of nitrogen, and reacting for 1 hour under 60 to obtain a polyurethane prepolymer;
step two, preparation of A component
Adding an equivalent blend of 5 parts by mass of dibutyl phthalate, 1 part by mass of BYK070, 7 parts by mass of talcum powder and calcium carbonate powder into a vacuum reaction kettle for dewatering, adding 30 parts by mass of polyurethane prepolymer, 1 part by mass of dibutyltin dilaurate and 0.5 part by mass of trimethyl orthoformate, mixing in a vacuum environment, and sealing and preserving to obtain a component A;
step three, preparation of curing agent
Mixing and stirring 1 part by mass of terephthalaldehyde, 30 parts by mass of polyether amine and 10 parts by mass of anhydrous magnesium sulfate for 24 hours, and filtering to obtain a curing agent;
step four, preparation of the component B
And (3) uniformly mixing 4 parts by mass of the curing agent prepared in the step (III), 1 part by mass of the mixture of chloroform and dibutyl phthalate and 0.5 part by mass of fumed silica, and sealing and preserving to obtain the component B.
When in use, the component A and the component B are mixed according to a proportion to obtain the bridge expansion joint protective adhesive.
Example 2
Step one, preparation of polyurethane prepolymer
Carrying out vacuum heating dehydration on 50 parts by mass of polyethylene glycol (Mn=2000) and 40 parts by mass of polyether polyol (Mn=3000), then adding the mixture into a reaction kettle, adding 20 parts by mass of equivalent blend of toluene diisocyanate and diphenylmethane diisocyanate under the protection of nitrogen, 1 part by mass of diethanolamine and 1 part by mass of stannous octoate, and reacting for 2 hours under 70 to obtain a polyurethane prepolymer;
step two, preparation of A component
Adding 10 parts by mass of dioctyl phthalate, 5 parts by mass of equivalent blend of BYK024 and HX-2085 and 20 parts by mass of equivalent blend of kaolin and silicon micropowder into a vacuum reaction kettle for dewatering, adding 60 parts by mass of polyurethane prepolymer, 5 parts by mass of dibutyltin dilaurate and 2 parts by mass of trimethyl orthoformate, mixing in a vacuum environment, and sealing and preserving to obtain a component A;
step three, preparation of curing agent
3 parts by mass of terephthalaldehyde, 60 parts by mass of polyether amine and 20 parts by mass of anhydrous magnesium sulfate are mixed and stirred for 24 hours, and then a curing agent is obtained by filtration;
step four, preparation of the component B
Uniformly mixing 10 parts by mass of the curing agent prepared in the step three, 3 parts by mass of the mixture of chloroform and dibutyl phthalate and 1.5 parts by mass of fumed silica, and sealing and preserving to obtain a component B;
when in use, the component A and the component B are mixed according to a proportion to obtain the bridge expansion joint protective adhesive.
Example 3
Step one, preparation of polyurethane prepolymer
Vacuum heating and dewatering 45 parts by mass of polyethylene glycol (Mn=4000) and 25 parts by mass of polyether polyol (Mn=5000), then adding into a reaction kettle, adding 15 parts by mass of 1, 6-hexamethylene diisocyanate, 1 part by mass of dibutyltin dilaurate and 0.6 part by mass of ethanolamine under the protection of nitrogen, and reacting for 1 hour under 80 to obtain a polyurethane prepolymer;
step two, preparation of A component
Adding 8 parts by mass of an equivalent blend of ethyl acetate, butyl acetate and butyl acetate, 3 parts by mass of BYK024, 7 parts by mass of talcum powder and 6 parts by mass of diatomite into a vacuum reaction kettle for dewatering, then adding 45 parts by mass of the prepared polyurethane prepolymer, 3 parts by mass of dibutyltin dilaurate and 1 part by mass of trimethyl orthoformate, mixing in a vacuum environment, and sealing and preserving to obtain a component A;
step three, preparation of curing agent
2 parts by mass of terephthalaldehyde, 40 parts by mass of polyether amine and 15 parts by mass of anhydrous calcium chloride are mixed and stirred for 24 hours, and then a curing agent is obtained by filtration;
step four, preparation of the component B
And (3) uniformly mixing 7 parts by mass of the curing agent prepared in the step (III), 2 parts by mass of the mixture of chloroform and dibutyl phthalate and 1 part by mass of fumed silica, and sealing and preserving to obtain the component B.
When in use, the component A and the component B are mixed according to a proportion to obtain the bridge expansion joint protective adhesive.
Example 4
Step one, preparation of polyurethane prepolymer
Vacuum heating and dewatering 25 parts by mass of polyethylene glycol (Mn=4000) and 22 parts by mass of polyether polyol (Mn=5000), then adding the materials into a reaction kettle, adding 13 parts by mass of 1, 6-hexamethylene diisocyanate, 0.6 part by mass of dibutyltin dilaurate, 0.5 part by mass of ethanolamine and 0.2 part by mass of diethanolamine under the protection of nitrogen, and reacting for 2 hours under 70 to obtain a polyurethane prepolymer;
step two, preparation of A component
Adding 4 parts by mass of dibutyl phthalate, 4 parts by mass of ethyl acetate, 2.5 parts by mass of HX-2085, 8 parts by mass of talcum powder and 6 parts by mass of calcium carbonate powder into a vacuum reaction kettle for dewatering, adding 45 parts by mass of polyurethane prepolymer, 2.5 parts by mass of dibutyl tin dilaurate and 0.8 part by mass of trimethyl orthoformate, mixing in a vacuum environment, and sealing and preserving to obtain a component A;
step three, preparation of curing agent
2 parts by mass of terephthalaldehyde, 46 parts by mass of polyether amine and 12 parts by mass of anhydrous calcium chloride are mixed and stirred for 24 hours, and then a curing agent is obtained by filtration;
step four, preparation of the component B
And (3) uniformly mixing 8 parts by mass of the curing agent prepared in the step (III), 2 parts by mass of the mixture of chloroform and dibutyl phthalate and 1.5 parts by mass of fumed silica, and sealing and preserving to obtain the component B.
When in use, the component A and the component B are mixed according to a proportion to obtain the bridge expansion joint protective adhesive.
Example 5
Step one, preparation of polyurethane prepolymer
Vacuum heating and dewatering 30 parts by mass of polyethylene glycol (Mn=3000) and 35 parts by mass of polyether polyol (Mn=6000), then adding the mixture into a reaction kettle, adding 6 parts by mass of 1, 6-xylylene diisocyanate, 7 parts by mass of isophorone diisocyanate, 0.8 part by mass of dibutyltin dilaurate and 0.3 part by mass of ethanolamine under the protection of nitrogen, and reacting for 2 hours under 70 to obtain a polyurethane prepolymer;
step two, preparation of A component
Adding 7 parts by mass of dioctyl phthalate, 1 part by mass of ethyl acetate, 1 part by mass of HX-2085, 5 parts by mass of kaolin, 5 parts by mass of silica micropowder and 6 parts by mass of diatomite into a vacuum reaction kettle for dewatering, adding 40 parts by mass of polyurethane prepolymer, 1 part by mass of dibutyltin dilaurate, 1 part by mass of stannous octoate and 0.5 part by mass of trimethyl orthoformate, mixing in a vacuum environment, and sealing and preserving to obtain a component A;
step three, preparation of curing agent
2 parts by mass of terephthalaldehyde, 38 parts by mass of polyether amine and 16 parts by mass of anhydrous magnesium sulfate are mixed and stirred for 24 hours, and then a curing agent is obtained by filtration;
step four, preparation of the component B
And (3) uniformly mixing 7 parts by mass of the curing agent prepared in the step (III), 3 parts by mass of the mixture of chloroform and dibutyl phthalate and 1 part by mass of fumed silica, and sealing and preserving to obtain the component B.
When in use, the component A and the component B are mixed according to a proportion to obtain the bridge expansion joint protective adhesive.
Example 6
Step one, preparation of polyurethane prepolymer
Vacuum heating and dewatering 40 parts by mass of polyethylene glycol (Mn=3000) and 15 parts by mass of polyether polyol (Mn=4000), then adding into a reaction kettle, adding 17 parts by mass of isophorone diisocyanate, 0.8 part by mass of dibutyltin dilaurate and 0.7 part by mass of diethanolamine under the protection of nitrogen, and reacting for 2 hours under 70 to obtain a polyurethane prepolymer;
step two, preparation of A component
Adding 5 parts by mass of dioctyl phthalate, 3 parts by mass of ethyl acetate, 1 part by mass of BYK024, 8 parts by mass of talcum powder and 6 parts by mass of diatomite into a vacuum reaction kettle for dewatering, adding 30 parts by mass of polyurethane prepolymer, 1 part by mass of dibutyltin dilaurate and 0.5 part by mass of trimethyl orthoformate, mixing in a vacuum environment, and sealing and preserving to obtain a component A;
step three, preparation of curing agent
2.5 parts by mass of terephthalaldehyde, 40 parts by mass of polyether amine and 14 parts by mass of anhydrous calcium chloride are mixed and stirred for 24 hours, and then the mixture is filtered to obtain a curing agent;
step four, preparation of the component B
And (3) uniformly mixing 5 parts by mass of the curing agent prepared in the step (III), 1 part by mass of the mixture of chloroform and dibutyl phthalate and 0.6 part by mass of fumed silica, and sealing and preserving to obtain the component B.
When in use, the component A and the component B are mixed according to a proportion to obtain the bridge expansion joint protective adhesive.
Example 7
Step one, preparation of polyurethane prepolymer
Vacuum heating and dewatering 15 parts by mass of polyethylene glycol (Mn=3000) and 35 parts by mass of polyether polyol (Mn=4000), then adding into a reaction kettle, adding 7 parts by mass of toluene diisocyanate, 12 parts by mass of diphenylmethane diisocyanate, 1 part by mass of diethanolamine and 1 part by mass of dibutyltin dilaurate into the reaction kettle under the protection of nitrogen, and reacting for 2 hours under 70 to obtain a polyurethane prepolymer;
step two, preparation of A component
Adding 7 parts by mass of dioctyl phthalate, equal blend of dibutyl phthalate, 2 parts by mass of BYK024, 1 part by mass of HX-2085, 10 parts by mass of kaolin and equal blend of silica micropowder into a vacuum reaction kettle for dewatering, adding 60 parts by mass of polyurethane prepolymer, 3 parts by mass of dibutyltin dilaurate and 1 part by mass of trimethyl orthoformate, mixing in a vacuum environment, and sealing and preserving to obtain a component A;
step three, preparation of curing agent
2 parts by mass of terephthalaldehyde, 32 parts by mass of polyether amine and 12 parts by mass of anhydrous magnesium sulfate are mixed and stirred for 24 hours, and then a curing agent is obtained by filtration;
step four, preparation of the component B
And (3) uniformly mixing 7 parts by mass of the curing agent prepared in the step (III), 3 parts by mass of the mixture of chloroform and dibutyl phthalate and 1 part by mass of fumed silica, and sealing and preserving to obtain the component B.
When in use, the component A and the component B are mixed according to a proportion to obtain the bridge expansion joint protective adhesive.
Table 1 table of performance parameters of bridge expansion joint protective gel prepared in example 1-example 7
Claims (4)
1. Bridge expansion joint protection glue with shape self-adaptation, its characterized in that: is a mixture of A, B,
the component A comprises the following components: 45-55 parts by mass of polyurethane prepolymer, 7-9 parts by mass of plasticizer, 2-3 parts by mass of catalyst, 2-3 parts by mass of defoamer, 0.5-1 part by mass of water scavenger and 10-15 parts by mass of filler;
the component B comprises the following components: 5-8 parts by mass of curing agent, 1-2 parts by mass of plasticizer and 0.5-1.5 parts by mass of thixotropic agent;
the polyurethane prepolymer in the A component comprises: 20-30 parts by mass of polyethylene glycol, 20-30 parts by mass of polyether polyol, 10-15 parts by mass of polyisocyanate, 0.5-0.8 part by mass of catalyst and 0.6-0.7 part by mass of accelerator; wherein the molecular weight of the polyether polyol is 3000-6000, and the functionality is 3;
the polyisocyanate in the polyurethane prepolymer is one or a mixture of two or more of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate or 1, 6-hexamethylene diisocyanate; the promoter is one or two of ethanolamine and diethanolamine;
the filler in the component A is one or a mixture of more than two of kaolin, calcium carbonate, montmorillonite, talcum powder, silicon micropowder and diatomite; the plasticizer is one or more of dibutyl phthalate, dioctyl phthalate, ethyl acetate, butyl acetate and butyl acetate; the defoamer is one or a mixture of two or more of BYK070, BYK024 or HX-2085; the water scavenger is trimethyl orthoformate;
the curing agent in the component B comprises: 1-2 parts by mass of terephthalaldehyde, 30-50 parts by mass of polyether amine and 10-15 parts by mass of drying agent;
the plasticizer in the component B is a mixture of chloroform and dibutyl phthalate; the thixotropic agent is fumed silica.
2. The bridge expansion joint protective gel according to claim 1, wherein: the molecular weight of polyethylene glycol in the polyurethane prepolymer is 2000-4000.
3. The bridge expansion joint protective gel according to claim 1, wherein: the catalyst in the component A and the polyurethane prepolymer thereof is one or a mixture of two of dibutyl tin dilaurate and stannous octoate.
4. The bridge expansion joint protective gel according to claim 1, wherein: the drying agent is any one of anhydrous magnesium sulfate and anhydrous calcium chloride.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818045A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Two-component polyurethane sealant |
| CN105385404A (en) * | 2015-12-21 | 2016-03-09 | 桂林市和鑫防水装饰材料有限公司 | Two-component polyurethane road-bridge sealing paste and preparation method thereof |
| CN107142069A (en) * | 2017-06-30 | 2017-09-08 | 广东普赛达密封粘胶有限公司 | It is a kind of without how track concrete extension joint is with can single dual-purpose construction type polyurethane base joint grouting glue of bi-component and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818045A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Two-component polyurethane sealant |
| CN105385404A (en) * | 2015-12-21 | 2016-03-09 | 桂林市和鑫防水装饰材料有限公司 | Two-component polyurethane road-bridge sealing paste and preparation method thereof |
| CN107142069A (en) * | 2017-06-30 | 2017-09-08 | 广东普赛达密封粘胶有限公司 | It is a kind of without how track concrete extension joint is with can single dual-purpose construction type polyurethane base joint grouting glue of bi-component and preparation method thereof |
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| Water-Enabled Room-Temperature Self-Healing and Recyclable Polyurea Materials with Super-Strong Strength, Toughness, and Large Stretchability;Zhen Shi,et al.;《ACS Appl. Mater. Interfaces》;20200424;第23484-23493页 * |
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