CN117487452A - Preparation method of special seal primer for organic permeation crystallization concrete - Google Patents
Preparation method of special seal primer for organic permeation crystallization concrete Download PDFInfo
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- CN117487452A CN117487452A CN202311680566.9A CN202311680566A CN117487452A CN 117487452 A CN117487452 A CN 117487452A CN 202311680566 A CN202311680566 A CN 202311680566A CN 117487452 A CN117487452 A CN 117487452A
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- 238000002425 crystallisation Methods 0.000 title claims abstract description 10
- 230000008025 crystallization Effects 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 8
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 27
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 12
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 11
- 239000000391 magnesium silicate Substances 0.000 claims description 10
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 10
- 235000019792 magnesium silicate Nutrition 0.000 claims description 10
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- 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 8
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 7
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 7
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- YLUIKWVQCKSMCF-UHFFFAOYSA-N calcium;magnesium;oxygen(2-) Chemical compound [O-2].[O-2].[Mg+2].[Ca+2] YLUIKWVQCKSMCF-UHFFFAOYSA-N 0.000 claims description 5
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 3
- 229940018564 m-phenylenediamine Drugs 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- 229920005989 resin Polymers 0.000 abstract description 16
- 239000011347 resin Substances 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 8
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 239000012948 isocyanate Substances 0.000 abstract description 4
- -1 aromatic isocyanate Chemical class 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 150000002513 isocyanates Chemical class 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract description 2
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 229920002635 polyurethane Polymers 0.000 description 5
- 239000004814 polyurethane Substances 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000011253 protective coating Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- NJVOHKFLBKQLIZ-UHFFFAOYSA-N (2-ethenylphenyl) prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1C=C NJVOHKFLBKQLIZ-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052909 inorganic silicate Inorganic materials 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 206010010356 Congenital anomaly Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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
-
- 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
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- 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
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3225—Polyamines
- C08G18/3237—Polyamines aromatic
- C08G18/324—Polyamines aromatic containing only one aromatic ring
-
- 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
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
-
- 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
- C09D7/20—Diluents or solvents
-
- 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
- C09D7/61—Additives non-macromolecular inorganic
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a preparation method of a special seal primer for organic permeation crystallization concrete, which is characterized in that an isocyanate resin is used as a base, a liquid bi-component normal temperature resin system is adopted, and the resin and aromatic isocyanate are solidified to form a film through chemical reaction hardening, so that an expected polymerization structure is generated, and the hardened polymer shows excellent chemical resistance, mechanical property and waterproof property, so that the concrete and a plurality of materials have excellent cohesiveness, good adhesive force is facilitated, and the impermeability of the concrete is improved.
Description
Technical Field
The invention relates to the technical field of concrete protection, in particular to a preparation method of a special seal primer for organic infiltration crystalline concrete.
Background
In the sewage treatment industry, as the base material of most sewage tanks is concrete, concrete cracking is a common phenomenon. Meanwhile, the corrosiveness of the sewage also puts higher demands on the corrosion prevention of the sewage pool. In order to meet the requirements of corrosion resistance, crack resistance and impermeability in the concrete protective coating, a primer which has good comprehensive performance and is suitable for construction is a key of the concrete protective coating. The main priming paint on the market at present is divided into the following types according to the properties and the resin types: inorganic silicate, oily epoxy, vinyl, aqueous acrylic, aqueous silicone-acrylate, aqueous styrene-acrylate, aqueous epoxy, oily polyurethane, aqueous polyurethane and the like, and the primer of the type has obvious advantages and disadvantages and unobvious comprehensive performance.
Inorganic silicate
The advantages are that: the permeability is strong, and the adhesive force between the coating and the concrete surface can be improved. The pore and crack on the surface of the concrete can be effectively filled and sealed, the cohesive force of the coating is enhanced, and the risk of stripping the coating is reduced.
Disadvantages: lack of adhesion to other types of coatings requires the use of an interfacial agent to increase adhesion to other coatings.
Oily epoxy
The advantages are that: the permeability is strong, and the adhesive force between the coating and the concrete surface can be improved.
Disadvantages: the epoxy resin is easy to separate amine in the using process, and the coating is easy to fall off.
Vinyl group
The advantages are that: the hardness and wear resistance of the concrete surface can be increased. It can reduce the abrasion and scratch of concrete surface and prolong the service life of ground.
Disadvantages: has special application limit and high reaction speed, and can bring some inconvenience to the construction process. Styrene is used as a solvent and is harmful to human body.
Aqueous acrylic acid type, aqueous silicone-acrylate type, aqueous styrene-acrylate type
The advantages are that: meets the safety and environmental protection standards, and does not contain harmful substances. They are nontoxic and harmless to constructors and environment, and can be safely used.
Disadvantages: cannot provide good moisture resistance, and cannot effectively prevent moisture penetration and moisture intrusion. This can lead to corrosion and damage of the concrete surface. Lack good resistance to chemicals. This can lead to rapid wear and corrosion of the coating when exposed to chemicals.
Aqueous epoxy and aqueous polyurethane
The advantages are that: meets the safety and environmental protection standards, and does not contain harmful substances. They are nontoxic and harmless to constructors and environment, and can be safely used. The permeability is strong, and the adhesive force between the coating and the concrete surface can be improved.
Disadvantages: the substrate has high dryness requirement, and the resin itself needs to be emulsified by an emulsifier, so that the resin cannot effectively prevent moisture penetration and moisture invasion after long-term soaking with water. This can lead to corrosion and damage of the concrete surface.
Oily polyurethanes
The advantages are that: is insensitive to the humidity of the base material, has adjustable hardness, good crack resistance and strong permeability.
Disadvantages: reacts with water to form multiple pores.
Disclosure of Invention
The invention aims at overcoming the defects and shortcomings of the prior art and provides a preparation method of a special seal coat for organic permeation crystallization concrete.
In order to achieve the above purpose, the invention adopts the following technical scheme: the preparation method of the special seal primer for the organic permeation crystallization concrete is characterized by comprising the following steps of:
s1, preparing a main agent: adding 240g-260g of 1,6 hexanediol into a 1L three-neck flask, regulating the rotating speed to 120-150 r/min, starting stirring, adding 26g-30g of trimethylolpropane into the three-neck flask, continuously stirring until the trimethylolpropane is completely dissolved, heating to 45-60 ℃, sequentially adding 1g-2g of sodium dodecyl benzene sulfonate, 0.2g-0.4g of polyacrylamide, 1.5g-3g of m-phenylenediamine, 0.3g-0.6g of triethylamine and 4.0g-8.0g of 500-mesh mixture containing calcium magnesium oxide, silicate and silicate, adding 200g of toluene, heating to 90-120 ℃ for reflux with water until the toluene in a water separator is clear, distilling the toluene under reduced pressure, cooling to 35 ℃, adding 350g-400g of butyl acetate, mixing and stirring at normal temperature to obtain 680g-720g of homogeneous semitransparent liquid which is the main agent;
s2, preparing a curing agent: 600g-650g of MDI (methylene diphenyl diisocyanate) and 80g-100g of butyl acetate are added into a 1L flask to obtain 680g-720g of liquid, namely curing agent;
s3, mixing the main agent and the curing agent according to the weight ratio of 1:1, and stirring at normal temperature for 3 minutes to obtain the seal primer.
The application method of the special seal coat for the organic permeation crystallization concrete has the innovation points that: when in use, the main agent and the curing agent are mixed according to the weight ratio of 1:1, and are used after being stirred for 3 minutes at normal temperature and are used within 180 minutes at 20-35 ℃.
The invention has the beneficial effects that:
the primer increases the adhesive force between the protective coating and the concrete; when the concrete permeates water, water reacts with the filler in the primer to form calcium silicate crystals to fill cracks in the concrete, so that the secondary repairing and anti-seepage effects are achieved.
Drawings
FIG. 1 is a graph showing the effect of the adhesion test of the present invention
Detailed Description
The invention is further illustrated below with reference to examples.
The present invention will be described in further detail in the following detailed description, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description is presented by way of example only and is not intended to limit the invention.
Example 1
The preparation method of the special seal primer for the organic permeation crystallization concrete comprises the following steps:
s1, preparing a main agent: adding 240g-260g of 1,6 hexanediol into a 1L three-neck flask, regulating the rotating speed to 120-150 r/min, starting stirring, adding 26g-30g of trimethylolpropane into the three-neck flask, continuously stirring until the trimethylolpropane is completely dissolved, heating to 45-60 ℃, sequentially adding 1g-2g of sodium dodecyl benzene sulfonate, 0.2g-0.4g of polyacrylamide, 1.5g-3g of m-phenylenediamine, 0.3g-0.6g of triethylamine and 4.0g-8.0g of 500-mesh mixture containing calcium magnesium oxide, silicate and silicate, adding 200g of toluene, heating to 90-120 ℃ for reflux with water until the toluene in a water separator is clear, distilling the toluene under reduced pressure, cooling to 35 ℃, adding 350g-400g of butyl acetate, mixing and stirring at normal temperature to obtain 680g-720g of homogeneous semitransparent liquid which is the main agent;
s2, preparing a curing agent: 600g-650g of MDI (diphenylmethane-4, 4' -diisocyanate) and 80g-100g of butyl acetate are added into a 1L flask to obtain 680g-720g of liquid which is curing agent;
s3, mixing the main agent and the curing agent according to the weight ratio of 1:1, and stirring at normal temperature for 3 minutes to obtain the seal primer.
When in use, the main agent and the curing agent are mixed according to the weight ratio of 1:1, and are used after being stirred for 3 minutes at normal temperature and are used within 180 minutes at 20-35 ℃.
Basic characteristics of the present invention: the usable time (100 g/25 ℃) is 180 minutes; film drying time (15 g/3mm/25 ℃) for 420 minutes; cure hardness Shore D70 (15 g/3mm/25 ℃ C.) for 48 hours;
during processing and use, many factors may influence, and the product should be fully tested for suitability before use (see table one and fig. 1).
| Name of the name | Unit (B) | Detection result |
| Elongation at tensile failure | ％ | 75 |
| Adhesion tensile test | MPa | Tensile stress 10 |
List one
From the above table, it can be seen that the present invention has good tensile failure elongation and tensile strength.
The material should be sealed in original packaging container, stored in clean and dry environment, and placed in dry place of 0-40deg.C (temperature not lower than 0deg.C), and not stored in sunlight. The shelf life of the invention is 12 months from the date of production.
The invention takes isocyanate resin as the base, adopts a liquid bi-component normal temperature resin system, and adopts the chemical reaction of curing resin and aromatic isocyanate to harden into a film, thereby generating an expected polymeric structure, and the hardened polymer shows excellent chemical resistance, mechanical property and waterproof property, can lead concrete to have excellent cohesiveness with a plurality of materials, is beneficial to generating good adhesive force and can increase the impermeability of the concrete.
The invention is characterized in that:
1. all aqueous resins were discarded as substrates since the coating in the lagoons was immersed in water for a long period of time;
2. due to the limitation of construction conditions and limited space operation, vinyl resin with high reaction speed and using styrene as a solvent is abandoned;
3. the epoxy resin has excellent performance, but in the actual use process, the high-humidity environment in the tank is easy to separate out amine to form a layer of oil film, which is unfavorable for the coating of the next process, so that the epoxy resin is abandoned;
4. selecting oily polyurethane resin as a base resin;
5. by selecting straight-chain dihydric alcohol as a polyurethane resin main chain, the viscosity of the resin is reduced, the using amount of a diluent is reduced, and meanwhile, the permeation of the resin to concrete is increased.
6. The 500-100 mesh calcium magnesium oxide, silicate and silicate are selected as fillers, and when the coating meets water, crystallization closed microcracks are formed to be used as a back water coating.
7. Compared with other materials, the polyurethane material has congenital advantages in strength, tensile strength, aging resistance, corrosion resistance and permeability, and can ensure that concrete and a plurality of materials have excellent cohesiveness.
8. Calcium magnesium oxide, silicate and silicate are uniformly dispersed in linear dihydric alcohol as filler, dimethylbenzene and butyl acetate are used as diluents, MDI (diphenylmethane diisocyanate) is used as curing agent and mixed with the diluents to form crosslinked resin, and the crosslinked resin is coated within 180 minutes to form a back water sealing layer for concrete. When the concrete cracks and seeps water, the water reacts with the filler to generate silicate crystal blocking gaps to repair the concrete cracks for the second time.
The foregoing is merely illustrative of the present invention and not restrictive, and other modifications and equivalents thereof may occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (2)
1. The preparation method of the special seal primer for the organic permeation crystallization concrete is characterized by comprising the following steps of:
s1, preparing a main agent: adding 240g-260g of 1,6 hexanediol into a 1L three-neck flask, regulating the rotating speed to 120-150 r/min, starting stirring, adding 26g-30g of trimethylolpropane into the three-neck flask, continuously stirring until the trimethylolpropane is completely dissolved, heating to 45-60 ℃, sequentially adding 1g-2g of sodium dodecyl benzene sulfonate, 0.2g-0.4g of polyacrylamide, 1.5g-3g of m-phenylenediamine, 0.3g-0.6g of triethylamine and 4.0g-8.0g of 500-mesh mixture containing calcium magnesium oxide, silicate and silicate, adding 200g of toluene, heating to 90-120 ℃ for reflux with water until the toluene in a water separator is clear, distilling the toluene under reduced pressure, cooling to 35 ℃, adding 350g-400g of butyl acetate, mixing and stirring at normal temperature to obtain 680g-720g of homogeneous semitransparent liquid which is the main agent;
s2, preparing a curing agent: 600g-650g of MDI (methylene diphenyl diisocyanate) and 80g-100g of butyl acetate are added into a 1L flask to obtain 680g-720g of liquid, namely curing agent;
s3, mixing the main agent and the curing agent according to the weight ratio of 1:1, and stirring at normal temperature for 3 minutes to obtain the seal primer.
2. The application method of the special seal coat for the organic permeation crystallization concrete is characterized by comprising the following steps of: when in use, the main agent and the curing agent are mixed according to the weight ratio of 1:1, and are used after being stirred for 3 minutes at normal temperature, and are used within 180 minutes at 20-35 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311680566.9A CN117487452A (en) | 2023-12-08 | 2023-12-08 | Preparation method of special seal primer for organic permeation crystallization concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311680566.9A CN117487452A (en) | 2023-12-08 | 2023-12-08 | Preparation method of special seal primer for organic permeation crystallization concrete |
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