CN107573810A - Self-repairing waterborne epoxy elastic composite coating material and preparation method thereof - Google Patents
Self-repairing waterborne epoxy elastic composite coating material and preparation method thereof Download PDFInfo
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- CN107573810A CN107573810A CN201710813293.9A CN201710813293A CN107573810A CN 107573810 A CN107573810 A CN 107573810A CN 201710813293 A CN201710813293 A CN 201710813293A CN 107573810 A CN107573810 A CN 107573810A
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- 239000004593 Epoxy Substances 0.000 title claims abstract description 77
- 238000000576 coating method Methods 0.000 title claims abstract description 71
- 239000011248 coating agent Substances 0.000 title claims abstract description 65
- 239000000463 material Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 50
- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 100
- 239000003094 microcapsule Substances 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 86
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical class O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000002250 absorbent Substances 0.000 claims abstract description 60
- 230000002745 absorbent Effects 0.000 claims abstract description 60
- 239000000203 mixture Substances 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 229920005989 resin Polymers 0.000 claims abstract description 41
- 239000011347 resin Substances 0.000 claims abstract description 41
- 239000006185 dispersion Substances 0.000 claims abstract description 38
- 239000003054 catalyst Substances 0.000 claims abstract description 23
- 239000003822 epoxy resin Substances 0.000 claims abstract description 22
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 22
- 239000012188 paraffin wax Substances 0.000 claims abstract description 20
- -1 alcohol amine Chemical group 0.000 claims abstract description 18
- 239000000839 emulsion Substances 0.000 claims description 73
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 48
- 229920000642 polymer Polymers 0.000 claims description 36
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 32
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims description 24
- 229920002635 polyurethane Polymers 0.000 claims description 22
- 239000004814 polyurethane Substances 0.000 claims description 22
- 239000007787 solid Substances 0.000 claims description 22
- 239000002562 thickening agent Substances 0.000 claims description 21
- 125000005396 acrylic acid ester group Chemical group 0.000 claims description 20
- 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 16
- 235000010215 titanium dioxide Nutrition 0.000 claims description 16
- 238000010792 warming Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- 229920005862 polyol Polymers 0.000 claims description 15
- 150000003077 polyols Chemical class 0.000 claims description 15
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- 239000006096 absorbing agent Substances 0.000 claims description 12
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 239000013530 defoamer Substances 0.000 claims description 9
- 238000006116 polymerization reaction Methods 0.000 claims description 9
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 8
- 238000007598 dipping method Methods 0.000 claims description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 7
- 239000012974 tin catalyst Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 150000002118 epoxides Chemical class 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 5
- 150000001412 amines Chemical class 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 241000047703 Nonion Species 0.000 claims description 2
- PYBNTRWJKQJDRE-UHFFFAOYSA-L dodecanoate;tin(2+) Chemical compound [Sn+2].CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O PYBNTRWJKQJDRE-UHFFFAOYSA-L 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
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- 125000000129 anionic group Chemical group 0.000 claims 2
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- 239000004567 concrete Substances 0.000 abstract description 9
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- 238000001179 sorption measurement Methods 0.000 abstract 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 13
- 239000002775 capsule Substances 0.000 description 11
- 230000001680 brushing effect Effects 0.000 description 7
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- 239000002994 raw material Substances 0.000 description 7
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 6
- 239000012975 dibutyltin dilaurate Substances 0.000 description 6
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- 229910052760 oxygen Inorganic materials 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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- 150000001336 alkenes Chemical class 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- AYOHIQLKSOJJQH-UHFFFAOYSA-N dibutyltin Chemical compound CCCC[Sn]CCCC AYOHIQLKSOJJQH-UHFFFAOYSA-N 0.000 description 2
- PCHPORCSPXIHLZ-UHFFFAOYSA-N diphenhydramine hydrochloride Chemical compound [Cl-].C=1C=CC=CC=1C(OCC[NH+](C)C)C1=CC=CC=C1 PCHPORCSPXIHLZ-UHFFFAOYSA-N 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
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- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 1
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical group C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 1
- WBYWAXJHAXSJNI-SREVYHEPSA-N Cinnamic acid Chemical compound OC(=O)\C=C/C1=CC=CC=C1 WBYWAXJHAXSJNI-SREVYHEPSA-N 0.000 description 1
- 206010011732 Cyst Diseases 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 101000823778 Homo sapiens Y-box-binding protein 2 Proteins 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- 239000004568 cement Substances 0.000 description 1
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- 238000006757 chemical reactions by type Methods 0.000 description 1
- 229930016911 cinnamic acid Natural products 0.000 description 1
- 235000013985 cinnamic acid Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
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- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
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- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Paints Or Removers (AREA)
Abstract
A self-repairing waterborne epoxy elastic composite coating material and a preparation method thereof belong to the technical field of coatings. And dispersing macroporous adsorption resin and a high water absorbent which adsorb a saturated HMDI prepolymer, a latent curing agent and a catalyst mixture into the paraffin wax melt to prepare macroporous adsorption resin high water absorbent microcapsules, and dispersing the macroporous adsorption resin high water absorbent microcapsules into water to form microcapsule dispersion liquid. Mixing the microcapsule dispersion liquid with water-based epoxy resin, water-based epoxy curing agent and the like, curing and forming a film to form the water-based epoxy elastic composite coating material with the self-repairing function. When the coating layer is scratched or the base material deforms to generate cracks, the high water absorbent in the microcapsules can absorb water in the air to expand, and the HMDI prepolymer and the latent curing agent can react quickly in the presence of moisture or water to generate groups such as alcohol amine and the like to generate a polyurethane urea condensate to repair the cracks cooperatively. The invention can be used in the field of highways such as tunnels, bridges, concrete protective walls, metal guardrails and the like, and has the functions of corrosion resistance, water resistance, attractive appearance, visual fatigue reduction and the like.
Description
Technical field
The invention belongs to technical field of coatings, and in particular to a kind of selfreparing water-base epoxy elastic composite coating material and its
Preparation method.
Background technology
Highway in China mileage increased rapidly in recent years, and the anti-corrosion and waterproof of highway concrete protecting wall, guardrail wires is protected
It is particularly important.With the increase of highway service life, highway protecting wall, guardrail wires etc. are corroded by rainwater, salt solution, acid mist
Seriously, although some protecting walls, guard rail are painted with protective coating, wheel run at high speed the stone that has hit hit under meeting
Crack or micropore, the crackle or micropore rainwater, Snow Agent salt solution, acid mist erosion under, exposed concrete or metal
Part can gradually be corroded it is rotten, reduce intensity.For problem above, the present invention proposes a kind of selfreparing water-base epoxy elastic composite
Coating material, using the high water absorbent containing HMDI performed polymers, latent curing agent and catalyst and macroporous absorbent resin as core, with stone
Wax is wall material, through being atomized quickly cooling generation microcapsules in the cold air less than 7 DEG C.This microcapsules is dispersed in water-base epoxy and
In the compositions such as its curing agent, VAE emulsions, acrylic acid ester emulsion, auxiliary agent, selfreparing composite coating material is formed, after film-forming
Quick self-repair function with fracture or micropore.Because HMDI performed polymers and its solidfied material have the function that anti-xanthochromia, shape
Into the lasting selfreparing coating material bright in luster of color inhibition, the fields such as highway, bridge, tunnel, civil buildings are can be applied to,
Waterproof, anti-corrosion, increasing colour are played, the effect to increase the service life.
Publication No. CN 105885679A disclose " it is a kind of based on microcapsule-type review one's lessons by oneself rehydration super-hydrophobic coat and its
Preparation method ".Mainly by groups such as aqueous film-forming resin, microcapsules, tool photocatalytic activity nano-particle, hydrophobic nano particles
Into.After coating surface is in physically worn or Organic Pollution, microcapsules meeting under photocatalytic Degradation in coating
Rupture discharges silicon fluoride and the impaired surface of self-healing, its ultra-hydrophobicity is recovered, ensures that coating exists
Persistence during outdoor use.Using light-catalyzed reaction type microcapsules, higher is required to repairing condition, and preparation technology is more multiple
Miscellaneous, the reparation speed to slight crack is slower.
Publication No. CN 105038502A disclose " a kind of selfreparing epoxide powder coating and its system containing microcapsules
Preparation Method ".Mainly it is made up of micro-crack selfreparing capsule, catalyst, epoxy powder resin matrix etc..The capsule of self-repairing microcapsule
Wall is urea and Lauxite, and capsule-core is dicyclopentadiene.When crackle occurs for coating, microcapsules rupture, two polycyclopentadithio.henes
Alkene can rapidly permeate into crackle, run into catalyst action and produce polymerization crosslinking, to reach the purpose of reparation.Equally it is to utilize response type
Microcapsules, the repair crack under catalyst action.The simply change on raw material, has no that to solve complex process, selfreparing slow
The problem of.
Publication No. CN 105400390A are disclosed " a kind of selfreparing polyurethane matt varnish ".Mainly by modified fat
Fat acid resin, nitrocellulose, microcapsules selfreparing particle, delustering agent, auxiliary agent, solvent, curing agent.Microcapsules selfreparing particle
It is a kind of thermoplastic acrylic resin sandwich microballoon.Using acrylic resin come repair crack, it is necessary to wait its fully dry after
Effective coating can just be formed.Its repair time grows up 24h, and preparation technology is complicated.
Publication No. CN 104449336A are disclosed " selfreparing aqueous wooden ware finish paint ".Mainly changed by self-crosslinking acrylic
Property the composition such as polyurethane resin, pigment, nanometer selfreparing auxiliary agent, Nano silicon dioxide dispersion, coalescents, function additive.
The fine crack selfreparing of woodenware surface can be realized, extends the service life of woodenware, while avoids manually repairing.Nanometer selfreparing
The reparation to crackle such as auxiliary agent, Nano silicon dioxide dispersion is limited, and the main or hardness by improving paint film reduces crackle
Generation.
Publication No. CN 105536657A are disclosed " a kind of synthetic method of photic self-repairing microcapsule ".Microcapsules capsule
Core material is using neopelex as surfactant, the core materials tool of the based compound of acyl function containing cinnamic acid
There is photosensitive property, can crosslink reaction in the case where light triggers induction, microcrack is repaired.And cyst material
It is the condensation copolymerization resin of urea/melamine/formaldehyde, it is environmentally friendly.Crack repairing is carried out using light triggering microcapsules.It is made
Standby complex process, it is high to repair the relatively slow condition requirement simultaneously to reparation.
Publication No. CN 106010188A are disclosed " polyurethane water-proof paint of selfreparing and preparation method thereof ".Mainly
Including polyurethane waterproof material, microencapsulation material.To building concrete basic unit because tiny caused by rising-heat contracting-cold and hydrated cementitious
Crack has good self-healing to act on, and greatly improves the effectiveness of waterproof material.Cement concrete material is mainly used in, utilization is micro-
Capsule repair crack.
Above-described various self-healing coatings, are repaiied using chemical reaction type microcapsules as the renovation agent of coating damage more
Multiple speed is slower, and quick good protective effect is not had to base material or price is higher is not suitable in the big face in highway field
Product uses.
The content of the invention
The drawbacks of in order to make up existing self-healing coatings, problem to be solved by this invention are to provide one kind quickly certainly
Repair water-base epoxy elastic composite coating material and preparation method thereof.
A kind of selfreparing water-base epoxy elastic composite coating material of the present invention, it is formed and content is by mass fraction：
Component A：20~25 parts of aqueous epoxy resin emulsion, 7~5 parts of VAE emulsions, 8~5 parts of acrylic acid ester emulsion；
B component：20~25 parts of aqueous epoxy curing agent, 5~3 parts of talcum powder are 20~15 parts of rutile type titanium white, water-based
0.6~0.3 part of polyurethane thickener, 0.5~0.1 part of defoamer, 0.6~0.2 part of levelling agent, ultra-violet absorber 0.4~0.2
Part, 0.4~0.2 part of antioxidant, 17.5~21 parts of industry water；
Component C：15~22 parts of micro-capsule dispersion liquid；
The specific preparation method of wherein described micro-capsule dispersion liquid is as follows：
The first step, the preparation of HMDI pre-polymer mixtures：
(1) weigh 25 parts of N220 polyoxypropylene polyols to be placed in reactor, under conditions of 120 DEG C, -0.09Mpa
Dehydration 2 hours, 75 parts of HMDI are added after being cooled to 50 DEG C, is warming up at 60 DEG C and reacts 1 hour, be then warming up at 80 DEG C and react
After 3.0 hours, deaeration 1 hour under -0.09Mpa vacuum condition, produce-NCO group mass content be 23% HMDI it is pre-
Aggressiveness；
(2) latent curing agent and tin dilaurate and then under the protection of dry nitrogen, are added in the performed polymer that (1) obtains
Dibutyl tin catalyst, it is stirred 20 minutes, obtains the HMDI pre-polymer mixtures containing latent curing agent and catalyst, dries
It is sealed under nitrogen protection；The addition of wherein described latent curing agent is according to the active hydrogen equivalent weight and HMDI of this kind of latent curing agent
In performed polymer-NCO group mass content come specifically determine；Wherein, the addition of catalyst is the HMDI pre-polymer mixtures
The 0.5% of gross mass.
Second step, the preparation of microcapsules：
Under the protection of dry nitrogen, by 30 parts of high water absorbent, 70 parts of macroporous absorbent resin, in HMDI prepared by step (2)
Dipping reaches saturation in pre-polymer mixture, then is dispersed in paraffin molten mass, after filtering out unnecessary melt paraffin,
The microcapsules containing HMDI pre-polymer mixtures of parafilm wrap are generated in drying cold air less than 7 DEG C through being atomized quickly cooling.
3rd step, the preparation of micro-capsule dispersion liquid：
Weigh 100 parts of water to be placed in dispersing apparatus, add step 2 and prepare being mixed containing HMDI performed polymers for parafilm wrap
150 parts of the microcapsules of compound are simultaneously uniformly dispersed, be made solid content be 60% it is micro- containing high water absorbent and macroporous absorbent resin
The micro-capsule dispersion liquid component of capsule.
Further preferred embodiment, the aqueous epoxy resin emulsion is that epoxide number is 0.21~0.23mol/100g, admittedly contain
Measure the non-ionic water epoxy emulsion for 50%；Described aqueous epoxy curing agent is that amine value is 0.22~0.24mol/100g,
Solid content is 50% aqueous epoxy curing agent；The VAE emulsions are the nonionic acetic acid second that commercially available solid content is 50%
Alkene ester-ethylene copolymer emulsion；The acrylic acid ester emulsion is that the anionic acrylic ester that commercially available solid content is 50% gathers
Compound emulsion.
Further preferred embodiment, described ultra-violet absorber, aqueous polyurethane thickener, antioxidant, defoamer, levelling
Agent is water miscible compound；
Further preferred embodiment, described HMDI be purity >=99.5% ,-NCO group mass fraction be 31.8~
32.1% 4,4'- dicyclohexyl methyl hydride diisocyanates；Described polyoxypropylene polyol is that relative molecular mass is
2000, degree of functionality is 2 polyoxypropylene polyol N220；Described latent curing agent refer to LCA-3000 types latent curing agent or
ALT-101 latent curing agents.
Described high water absorbent is the super absorbent resin of particle diameter≤40 μm；Described macroporous absorbent resin is that granularity is
200 purposes are without cation exchange groups and have the preparation of macroporous structure.
A kind of method for preparing above-mentioned reparation water-base epoxy elastic composite coating material, is completed as follows：
The first step, by 20~25 parts above-mentioned of aqueous epoxy resin emulsion, 7~5 parts of VAE emulsions, acrylic acid ester emulsion 8~
20~25 parts of the component A of 5 parts of compositions and aqueous epoxy curing agent, 5~3 parts of talcum powder, 20~15 parts of rutile type titanium white, water
0.6~0.3 part of polyurethane thickener of property, 0.5~0.1 part of defoamer, 0.6~0.2 part of levelling agent, ultra-violet absorber 0.4~
0.2 part, 0.4~0.2 part of antioxidant, the B component of 17.5~21 parts of compositions of industry water is well mixed；
Second step, then be well mixed with the component C of obtained 15~22 parts of micro-capsule dispersion liquid, that is, it is made and reviews one's lessons by oneself rehydration
Epoxy elastic composite coating material.
Further preferred embodiment, the aqueous epoxy resin emulsion is that epoxide number is 0.21~0.23mol/100g, admittedly contain
Measure the non-ion aqueous epoxy emulsion for 50%；Described aqueous epoxy curing agent is that amine value is 0.22~0.24mol/
100g, solid content are 50% aqueous epoxy curing agent；The VAE emulsions are the nonionic vinegar that commercially available solid content is 50%
Vinyl acetate-ethylene copolymer emulsion；The acrylic acid ester emulsion is the anionic acrylic that commercially available solid content is 50%
Ester polymer emulsion.
Further preferred embodiment, described defoamer, aqueous polyurethane thickener, levelling agent, ultra-violet absorber, antioxygen
Agent is water miscible compound.
The obtained selfreparing water-base epoxy elastic composite coating material of the present invention can use spraying or the method brushed to use, and apply
Film thickness≤200 μm, thickness can use brushing number to control.
Further preferred embodiment, described ultra-violet absorber are the BYK-3840 or Huizhou fluorescent of German Bi Ke companies
Any one in the UV-2 of plastic pigment Co., Ltd；Antioxidant is the KL- of Guangzhou Zhuo Hou Chemical Industry Science Co., Ltd production
1061 or Nanjing Datang chemical industry Co., Ltd production antioxidant 264 in any one；Described defoamer is
The DC-71 of Air Prod ＆ Chem of the U.S. or Tech-365W of Shanghai Tag Polymer Sciences Ltd or German Bi Ke
Any one in the BYK-019 of company；Described levelling agent is that the DC-57 of Air Prod ＆ Chem of the U.S. or Germany finish
Any one in the BYK-333 of gram company；Described aqueous polyurethane thickener is given birth to for Han Tai Chemical Co., Ltd.s of Nantong City
The TEGO that the HT-820 aqueous polyurethane thickeners or trade Co., Ltd of three liters, Shunde District of Foshan City of production provide
The aqueous polyurethane thickeners of ViscoPlus 3030.
Further preferred embodiment, described HMDI be purity >=99.5% ,-NCO group mass fraction be 31.8~
32.1% 4,4'- dicyclohexyl methyl hydride diisocyanates；Described polyoxypropylene polyol is that relative molecular mass is
2000, degree of functionality is 2 polyoxypropylene polyol N220；Described latent curing agent refer to LCA-3000 types latent curing agent or
ALT-101 latent curing agents.
Further preferred embodiment, described high water absorbent are the super absorbent resins of particle diameter≤40 μm；Described macropore is inhaled
Attached resin is commercially available macroporous absorbent resin and is processed into the macroporous absorbent resin micro mist that granularity is 200 mesh certainly.
The present invention adds one using HMDI and polyoxypropylene polyol N220 as Material synthesis HMDI performed polymers, according to calculating
Quantitative latent curing agent and catalyst form HMDI pre-polymer mixtures., will using high water absorbent and macroporous absorbent resin as core
They impregnate in the mixture of HMDI performed polymers, latent curing agent and dibutyltin dilaurate catalyst reaches saturation, then
The high water absorbent and macroporous absorbent resin point of HMDI performed polymers, latent curing agent and dibutyltin dilaurate catalyst will be adsorbed with
It is dispersed in paraffin molten mass, paraffin is generated through being atomized quickly cooling in the drying cold air less than 7 DEG C after filtering out unnecessary paraffin
The microcapsules containing HMDI performed polymers, latent curing agent and dibutyltin dilaurate catalyst of parcel, this microcapsules is disperseed
In water, the micro-capsule dispersion liquid component of the microcapsules containing high water absorbent and macroporous absorbent resin is formed.Finally by microcapsules
Dispersion liquid and the component A based on aqueous epoxy resins, the mixing cured film forming of the B component based on aqueous epoxy curing agent, are formed
Water-base epoxy elastic composite coating material with self-repair function.When the coating that the coating material is formed is scratched or by base material
Expand with heat and contract with cold and crack or during micropore, the moisture content that the high water absorbent of exposure can be adsorbed in air first in microcapsules is swollen rapidly
Swollen, first fracture is blocked, then in the HMDI performed polymers in macroporous absorbent resin or high water absorbent-NCO group can be with
The group such as gas or the hydramine of water generation reacts rapidly generation polyurethane-urea solidfied material film to latent curing agent in case of wet, and dual synergy is total to
Same repair crack, the coating at crack is connected as one, repair crack so as to reach quick, effectively prevent acid mist, salt solution, water
The further erosion of concrete or metal base, reaches waterproof, corrosion-resistant purpose at the fractures such as part.Because HMDI performed polymers are consolidated
Compound has the function that anti-xanthochromia, can form the lasting self-healing coatings bright in luster of color inhibition, the composite coating material can
Protective coating as the concrete protection wall such as highway, bridge, tunnel and guardrail wires etc. uses, and plays waterproof, anti-corrosion, U.S.
See, the effect of durable.
Compared with prior art, its advantage and good effect are as follows:
1. a kind of selfreparing water-base epoxy elastic composite coating material prepared by the present invention, coating is scratched or external force is wounded
Crack or micropore after, the microcapsules in coating can rupture immediately, gas or the water meeting in case of wet of the super absorbent resin in microcapsules
Rapid expansion first blocks crack, in the MHDI performed polymers in subsequent macroporous absorbent resin and contained by high water absorbent-
NCO group can meet the alcohol amine groups of water generation under dibutyltin dilaurate catalyst effect with latent curing agent, rapid to react
Polyurethane-urea macromolecular chain is generated, the water absorbent granule of independence, macroporous absorbent resin and fracture coating at crack are connected and formed
One Integral net shaped membrane structure, reach good selfreparing purpose, review one's lessons by oneself that complex velocity is fast, and repairing effect is good.
2. a kind of selfreparing water-base epoxy elastic composite coating material prepared by the present invention, only the high of exposure is inhaled at scuffing
Repair occurs for the MHDI performed polymers fracture in aqua and macroporous absorbent resin, and remaining intact part of coating will not occur
Phenomena such as swelling, bubbling.
3. the presence of latent curing agent and dibutyltin dilaurate catalyst can improve reparation speed, when latent curing agent in case of wet
Generation alcamines active group can be reacted when gas or water rapidly, in hydramine active group meeting and MHDI performed polymers-NCO group
Rapid reaction generation ammonia ester bond or urea bond, reaction speed be faster than in MHDI performed polymers-reaction speed of NCO group and water, from
And produce CO when avoiding MHDI performed polymers and water reaction2Phenomenon, CO2Presence can make occur a small amount of gas at the crack of reparation
Bubble, make the reduction of repair layer density.
4. a kind of selfreparing water-base epoxy elastic composite coating material prepared by the present invention is colourless after shaping or can foundation
Need to add the coating material that different mill bases form different colours, because MHDI performed polymer solidfied materials have the function that anti-xanthochromia,
With other base-materials it is mixing cured after can form lasting self-healing coatings bright in luster, available for highway concrete porotective wall,
Bridge revetment, Super Long Tunnel colour Landscape Region, metal protection Lan Deng highways field or residential construction area, play durable water resistant,
Anti-corrosion, increasing colour, reduce visual fatigue effect.
A kind of 5. selfreparing water-base epoxy elastic composite coating material prepared by the present invention, using water as diluent, to environment
Close friend, to operating personnel's fanout free region, belong to green product.
Embodiment
The embodiment of the present invention is made an explanation below.
Embodiment 1
A kind of selfreparing water-base epoxy elastic composite coating material described in the present embodiment, include the raw material of following mass fraction
Composition：
Component A：20 parts of aqueous epoxy resin emulsion, 7 parts of VAE emulsions, 8 parts of acrylic acid ester emulsion；
B component：20 parts of aqueous epoxy curing agent, 5 parts of talcum powder, 20 parts of rutile type titanium white, TEGO ViscoPlus
3030 0.6 part of aqueous polyurethane thickeners, 0.5 part of BYK-019 defoamers, 0.6 part of DC-57 levelling agents, BYK-3840 ultraviolets
0.4 part, 0.4 part antioxidant 264 of absorbent, 17.5 parts of industry water；
Component C：15 parts of micro-capsule dispersion liquid.
The preparation method of wherein described micro-capsule dispersion liquid, is completed according to following steps：
The first step, the preparation of HMDI performed polymers：
Weigh 25 parts of polyoxypropylene polyol N220 to be placed in reactor, be dehydrated under conditions of 120 DEG C, -0.09Mpa
2 hours, 75 parts of HMDI are added after being cooled to 50 DEG C, is warming up at 60 DEG C and reacts 1 hour, be then warming up at 80 DEG C and react 3.0
Hour after, deaeration 1 hour under -0.09Mpa vacuum condition, produce-NCO group mass content be 23% HMDI pre-polymerizations
Body.
Then under the protection of dry nitrogen, 60.2 parts of LCA-3000 latent curing agents and 0.81 part are added in above-mentioned performed polymer
Dibutyltin dilaurate catalyst, it is stirred 20 minutes, obtains containing LCA-3000 latent curing agents and T-12 tin dilaurates
The HMDI pre-polymer mixtures of dibutyl tin catalyst, it is sealed under drying nitrogen protection.
Second step, the preparation of microcapsules：
Under the protection of dry nitrogen, by 30 parts of the high hydroscopic resin of particle diameter≤40 μm, the macroporous absorbent resin 70 of 200 mesh
Part, dipping reaches saturation in HMDI pre-polymer mixtures prepared by second step, then is dispersed in paraffin molten mass, filters
Contain HMDI pre-polymerizations through atomization quickly cooling generation parafilm wrap in the drying cold air less than 7 DEG C after falling unnecessary melt paraffin
The microcapsules of body mixture.
3rd step, the preparation of micro-capsule dispersion liquid：
Weigh 100 parts of water to be placed in dispersing apparatus, add micro- glue containing HMDI pre-polymer mixtures of parafilm wrap
150 parts of capsule, after being uniformly dispersed, the micro- glue for the microcapsules containing high water absorbent and macroporous absorbent resin that solid content is 60% is made
Capsule dispersed liquid component.
A kind of preparation method of selfreparing water-base epoxy elastic composite coating material, complete as follows described in the present embodiment
Into：
20 parts of aqueous epoxy resin emulsion, 7 parts of VAE emulsions, 8 parts of acrylic acid ester emulsion is weighed to be mixed evenly and A is made
Component；
Weigh 20 parts of aqueous epoxy curing agent, 5 parts of talcum powder, 20 parts of rutile type titanium white, HT-820 aqueous polyurethanes
0.6 part of thickener, 0.5 part of BYK-019 defoamers, 0.6 part of DC-57 levelling agents, 0.4 part of BYK-3840 ultra-violet absorbers, 0.4
Part antioxidant 264,17.5 parts of industry water are mixed evenly and B component are made；
Component C is 15 parts of micro-capsule dispersion liquid.
Above-mentioned tri- components of A, B, C are thoroughly mixed and obtain selfreparing water-base epoxy elastic composite coating material,
Can be sprayed or brushed can use brushing number to control in the surface of protected object, coating layer thickness≤200 μm, thickness.
Embodiment 2
A kind of selfreparing water-base epoxy elastic composite coating material described in the present embodiment, include the raw material of following mass fraction
Composition：
Component A：25 parts of aqueous epoxy resin emulsion, 5 parts of VAE emulsions, 5 parts of acrylic acid ester emulsion；
B component：25 parts of aqueous epoxy curing agent, 3 parts of talcum powder, 15 parts of rutile type titanium white, the water-based poly- ammonia of HT-820
0.3 part of ester thickener, 0.1 part of Tech-365W defoamers, 0.2 part of BYK-333 levelling agents, 0.2 part of UV-2 ultra-violet absorbers,
0.2 part of KL-1061 antioxidant, 21 parts of industry water；
Component C：22 parts of micro-capsule dispersion liquid.
The preparation method of wherein described micro-capsule dispersion liquid, is completed according to following steps：
The first step, the preparation of HMDI performed polymers：
Weigh 25 parts of polyoxypropylene polyol N220 to be placed in reactor, be dehydrated under conditions of 120 DEG C, -0.09Mpa
2 hours, 75 parts of HMDI are added after being cooled to 50 DEG C, is warming up at 60 DEG C and reacts 1 hour, be then warming up at 80 DEG C and react 3.0
Hour after, deaeration 1 hour under -0.09Mpa vacuum condition, produce-NCO group mass content be 23% HMDI pre-polymerizations
Body.
Then under the protection of dry nitrogen, 65.7 parts of LCA-3000 latent curing agents and 0.83 2 are added in above-mentioned performed polymer
Dibutyl tin laurate catalyst, it is stirred 20 minutes, obtains containing LCA-3000 latent curing agents and di lauric dibutyl
The HMDI pre-polymer mixtures of tin catalyst, it is sealed under drying nitrogen protection.
Second step, the preparation of microcapsules：
Under the protection of dry nitrogen, by 30 parts of the high water absorbent of particle diameter≤40 μm, 70 parts of the macroporous absorbent resin of 200 mesh,
Dipping reaches saturation in HMDI pre-polymer mixtures prepared by second step, then is dispersed in paraffin molten mass, filters out
Contain HMDI performed polymers through atomization quickly cooling generation parafilm wrap in the drying cold air less than 7 DEG C after unnecessary melt paraffin
The microcapsules of mixture.
3rd step, the preparation of micro-capsule dispersion liquid：
Weigh 100 parts of water to be placed in dispersing apparatus, add micro- glue containing HMDI pre-polymer mixtures of parafilm wrap
150 parts of capsule, is uniformly dispersed, and the microcapsules for the microcapsules containing high water absorbent and macroporous absorbent resin that solid content is 60% are made
Dispersed liquid component.
A kind of preparation method of selfreparing water-base epoxy elastic composite coating material, complete as follows described in the present embodiment
Into：
25 parts of aqueous epoxy resin emulsion, 5 parts of VAE emulsions, 5 parts of acrylic acid ester emulsion is weighed to be mixed evenly and A is made
Component；
Weigh 25 parts of aqueous epoxy curing agent, 3 parts of talcum powder, 15 parts of rutile type titanium white, aqueous polyurethane thickener
0.3 part, 0.1 part of Tech-365W defoamers, 0.2 part of BYK-333 levelling agents, 0.2 part of UV-2 ultra-violet absorbers, KL-1061 resist
0.2 part of oxygen agent, 21 parts of industry water are mixed evenly and B component are made；
Component C is 22 parts of micro-capsule dispersion liquid.
Above-mentioned tri- components of A, B, C are thoroughly mixed and obtain selfreparing water-base epoxy elastic composite coating material,
Can be sprayed or brushed can use brushing number to control in the surface of protected object, coating layer thickness≤200 μm, thickness.
Embodiment 3
A kind of selfreparing water-base epoxy elastic composite coating material described in the present embodiment, include the raw material of following mass fraction
Composition：
Component A：21 parts of aqueous epoxy resin emulsion, 7 parts of VAE emulsions, 7 parts of acrylic acid ester emulsion；
B component：21 parts of aqueous epoxy curing agent, 4.5 parts of talcum powder, 19 parts of rutile type titanium white, TEGO
0.6 part of ViscoPlus3030 aqueous polyurethane thickeners, 0.5 part of DC-71 defoamers, 0.6 part of DC-57 levelling agents, BYK-3840
0.4 part, 0.4 part DBPC 2,6 ditertiary butyl p cresol antioxidant of ultra-violet absorber, 18 parts of industry water；
Component C：17 parts of micro-capsule dispersion liquid.
The preparation method of wherein described micro-capsule dispersion liquid, is completed according to following steps：
The first step, the preparation of HMDI performed polymers：
Weigh 25 parts of polyoxypropylene polyol N220 to be placed in reactor, be dehydrated under conditions of 120 DEG C, -0.09Mpa
2 hours, 75 parts of HMDI are added after being cooled to 50 DEG C, is warming up at 60 DEG C and reacts 1 hour, be then warming up at 80 DEG C and react 3.0
Hour after, deaeration 1 hour under -0.09Mpa vacuum condition, produce-NCO group mass content be 23% HMDI pre-polymerizations
Body.
Then under the protection of dry nitrogen, 78.2 parts of ALT-101 latent curing agents and 0.90 2 are added in above-mentioned performed polymer
Dibutyl tin laurate catalyst, it is stirred 20 minutes, obtains containing ALT-101 latent curing agents and dibutyl tin laurate
The HMDI pre-polymer mixtures of catalyst, it is sealed under drying nitrogen protection.
Second step, the preparation of microcapsules：
Under the protection of dry nitrogen, by 30 parts of the high water absorbent of particle diameter≤40 μm, 70 parts of the macroporous absorbent resin of 200 mesh,
Dipping reaches saturation in HMDI pre-polymer mixtures prepared by second step, then is dispersed in paraffin molten mass, filters out
Contain HMDI performed polymers through atomization quickly cooling generation parafilm wrap in the drying cold air less than 7 DEG C after unnecessary melt paraffin
The microcapsules of mixture.
3rd step, the preparation of micro-capsule dispersion liquid：
Weigh 100 parts of water to be placed in dispersing apparatus, add micro- glue containing HMDI pre-polymer mixtures of parafilm wrap
150 parts of capsule, is uniformly dispersed, and the microcapsules for the microcapsules containing high water absorbent and macroporous absorbent resin that solid content is 60% are made
Dispersed liquid component.
A kind of preparation method of selfreparing water-base epoxy elastic composite coating material, complete as follows described in the present embodiment
Into：
21 parts of aqueous epoxy resin emulsion, 7 parts of VAE emulsions, 7 parts of acrylic acid ester emulsion is weighed to be mixed evenly and A is made
Component；
Weigh 21 parts of aqueous epoxy curing agent, 4.5 parts of talcum powder, 19 parts of rutile type titanium white, aqueous polyurethane thickening
0.4 part, 0.4 part 0.6 part of agent, 0.5 part of DC-71 defoamers, 0.6 part of DC-57 levelling agents, BYK-3840 ultra-violet absorbers antioxygen
Agent 264,18 parts of industry water are mixed evenly and B component are made；
Component C is 17 parts of micro-capsule dispersion liquid.
Above-mentioned tri- components of A, B, C are thoroughly mixed and obtain selfreparing water-base epoxy elastic composite coating material,
Can be sprayed or brushed can use brushing number to control in the surface of protected object, coating layer thickness≤200 μm, thickness.
Embodiment 4
A kind of selfreparing water-base epoxy elastic composite coating material described in the present embodiment, include the raw material of following mass fraction
Composition：
Component A：22 parts of aqueous epoxy resin emulsion, 6.5 parts of VAE emulsions, 6.5 parts of acrylic acid ester emulsion；
B component：22 parts of aqueous epoxy curing agent, 4.5 parts of talcum powder, 18 parts of rutile type titanium white, HT-820 are water-based poly-
0.5 part of urethane thickener, 0.4 part of BYK-019 defoamers, 0.5 part of BYK-333 levelling agents, 0.3 part of UV-2 ultra-violet absorbers,
0.3 part of KL-1061 antioxidant, 18.5 parts of industry water；
Component C：18 parts of micro-capsule dispersion liquid.
The preparation method of wherein described micro-capsule dispersion liquid, is completed according to following steps：
The first step, the preparation of HMDI performed polymers：
Weigh 25 parts of polyoxypropylene polyol N220 to be placed in reactor, be dehydrated under conditions of 120 DEG C, -0.09Mpa
2 hours, 75 parts of HMDI are added after being cooled to 50 DEG C, is warming up at 60 DEG C and reacts 1 hour, be then warming up at 80 DEG C and react 3.0
Hour after, deaeration 1 hour under -0.09Mpa vacuum condition, produce-NCO group mass content be 23% HMDI pre-polymerizations
Body.
Then under the protection of dry nitrogen, 78.2 parts of LCA-3000 latent curing agents and 0.90 2 are added in above-mentioned performed polymer
Dibutyl tin laurate catalyst, it is stirred 20 minutes, obtains containing LCA-3000 latent curing agents and di lauric dibutyl
The HMDI pre-polymer mixtures of tin catalyst, it is sealed under drying nitrogen protection.
Second step, the preparation of microcapsules：
Under the protection of dry nitrogen, by 30 parts of the high water absorbent of particle diameter≤40 μm, 70 parts of the macroporous absorbent resin of 200 mesh,
Dipping reaches saturation in HMDI pre-polymer mixtures prepared by second step, then is dispersed in paraffin molten mass, filters out
Contain HMDI performed polymers through atomization quickly cooling generation parafilm wrap in the drying cold air less than 7 DEG C after unnecessary melt paraffin
The microcapsules of mixture.
3rd step, the preparation of micro-capsule dispersion liquid：
Weigh 100 parts of water to be placed in dispersing apparatus, add micro- glue containing HMDI pre-polymer mixtures of parafilm wrap
150 parts of capsule, is uniformly dispersed, and the microcapsules for the microcapsules containing high water absorbent and macroporous absorbent resin that solid content is 60% are made
Dispersed liquid component.
A kind of preparation method of selfreparing water-base epoxy elastic composite coating material, complete as follows described in the present embodiment
Into：
Weigh 22 parts of aqueous epoxy resin emulsion, 6.5 parts of VAE emulsions, 6.5 parts of acrylic acid ester emulsion and system is mixed evenly
Into component A；
Weigh 22 parts of aqueous epoxy curing agent, 4.5 parts of talcum powder, 18 parts of rutile type titanium white, aqueous polyurethane thickening
0.5 part of agent, 0.4 part of BYK-019 defoamers, 0.5 part of BYK-333 levelling agents, 0.3 part of UV-2 ultra-violet absorbers, KL-1061 resist
0.3 part of oxygen agent, 18.5 parts of industry water are mixed evenly and B component are made；
Component C is 18 parts of micro-capsule dispersion liquid.
Above-mentioned tri- components of A, B, C are thoroughly mixed and obtain selfreparing water-base epoxy elastic composite coating material,
Can be sprayed or brushed can use brushing number to control in the surface of protected object, coating layer thickness≤200 μm, thickness.
Embodiment 5
A kind of selfreparing water-base epoxy elastic composite coating material described in the present embodiment, include the raw material of following mass fraction
Composition：
Component A：23 parts of aqueous epoxy resin emulsion, 6 parts of VAE emulsions, 6 parts of acrylic acid ester emulsion；
B component：23 parts of aqueous epoxy curing agent, 4 parts of talcum powder, 17 parts of rutile type titanium white, TEGO ViscoPlus
3030 0.5 part of aqueous polyurethane thickeners, 0.3 part of Tech-365W defoamers, 0.4 part of DC-57 levelling agents, BYK-3840 are ultraviolet
0.3 part, 0.3 part antioxidant 264 of light absorbers, 19.2 parts of industry water；
Component C：19 parts of micro-capsule dispersion liquid.
The preparation method of wherein described micro-capsule dispersion liquid, is completed according to following steps：
The first step, the preparation of HMDI performed polymers：
Weigh 25 parts of polyoxypropylene polyol N220 to be placed in reactor, be dehydrated under conditions of 120 DEG C, -0.09Mpa
2 hours, 75 parts of HMDI are added after being cooled to 50 DEG C, is warming up at 60 DEG C and reacts 1 hour, be then warming up at 80 DEG C and react 3.0
Hour after, deaeration 1 hour under -0.09Mpa vacuum condition, produce-NCO group mass content be 23% HMDI pre-polymerizations
Body.
Then under the protection of dry nitrogen, 57.5 parts of LCA-3000 latent curing agents and 0.79 2 are added in above-mentioned performed polymer
Dibutyl tin laurate catalyst, it is stirred 20 minutes, obtains containing LCA-3000 latent curing agents and di lauric dibutyl
The HMDI pre-polymer mixtures of tin catalyst, it is sealed under drying nitrogen protection.
Second step, the preparation of microcapsules：
Under the protection of dry nitrogen, by 30 parts of the high water absorbent of particle diameter≤40 μm, 70 parts of the macroporous absorbent resin of 200 mesh,
Dipping reaches saturation in HMDI pre-polymer mixtures prepared by second step, then is dispersed in paraffin molten mass, filters out
Contain HMDI performed polymers through atomization quickly cooling generation parafilm wrap in the drying cold air less than 7 DEG C after unnecessary melt paraffin
The microcapsules of mixture.
3rd step, the preparation of micro-capsule dispersion liquid：
Weigh 100 parts of water to be placed in dispersing apparatus, add micro- glue containing HMDI pre-polymer mixtures of parafilm wrap
150 parts of capsule, is uniformly dispersed, and the microcapsules for the microcapsules containing high water absorbent and macroporous absorbent resin that solid content is 60% are made
Dispersed liquid component.
A kind of preparation method of selfreparing water-base epoxy elastic composite coating material, complete as follows described in the present embodiment
Into：
23 parts of aqueous epoxy resin emulsion, 6 parts of VAE emulsions, 6 parts of acrylic acid ester emulsion is weighed to be mixed evenly and A is made
Component；
Weigh 23 parts of aqueous epoxy curing agent, 4 parts of talcum powder, 17 parts of rutile type titanium white, aqueous polyurethane thickener
0.5 part, 0.3 part of Tech-365W defoamers, 0.4 part of DC-57 levelling agents, 0.3 part of BYK-3840 ultra-violet absorbers, 0.3 part it is anti-
Oxygen agent 264,19.2 parts of industry water are mixed evenly and B component are made；
Component C is 19 parts of micro-capsule dispersion liquid.
Above-mentioned tri- components of A, B, C are thoroughly mixed and obtain selfreparing water-base epoxy elastic composite coating material,
Can be sprayed or brushed can use brushing number to control in the surface of protected object, coating layer thickness≤200 μm, thickness.
Embodiment 6
A kind of selfreparing water-base epoxy elastic composite coating material described in the present embodiment, include the raw material of following mass fraction
Composition：
Component A：24 parts of aqueous epoxy resin emulsion, 5.5 parts of VAE emulsions, 5.5 parts of acrylic acid ester emulsion；
B component：24 parts of aqueous epoxy curing agent, 3 parts of talcum powder, 16 parts of rutile type titanium white, the water-based poly- ammonia of HT-820
0.4 part of ester thickener, 0.2 part of DC-71 defoamers, 0.3 part of DC-51 levelling agents, 0.2 part of UV-2 ultra-violet absorbers, 0.2 part it is anti-
20.7 parts of oxygen agent 264, industry water；
Component C：20 parts of micro-capsule dispersion liquid.
The preparation method of wherein described micro-capsule dispersion liquid, is completed according to following steps：
The first step, the preparation of HMDI performed polymers：
Weigh 25 parts of polyoxypropylene polyol N220 to be placed in reactor, be dehydrated under conditions of 120 DEG C, -0.09Mpa
2 hours, 75 parts of HMDI are added after being cooled to 50 DEG C, is warming up at 60 DEG C and reacts 1 hour, be then warming up at 80 DEG C and react 3.0
After hour, deaeration 1 hour under -0.09Mpa vacuum condition, the HMDI performed polymers that-NCO mass contents are 23% are produced.
Then under the protection of dry nitrogen, 78.2 parts of ALT-101 latent curing agents and 0.90 2 are added in above-mentioned performed polymer
Dibutyl tin laurate catalyst, it is stirred 20 minutes, obtains containing ALT-101 latent curing agents and dibutyl tin laurate
The HMDI pre-polymer mixtures of catalyst, it is sealed under drying nitrogen protection.
Second step, the preparation of microcapsules：
Under the protection of dry nitrogen, by 30 parts of the high water absorbent of particle diameter≤40 μm, 70 parts of the macroporous absorbent resin of 200 mesh,
Dipping reaches saturation in HMDI pre-polymer mixtures prepared by second step, then is dispersed in paraffin molten mass, filters out
Through being atomized being mixed containing HMDI performed polymers for quickly cooling generation parafilm wrap in the cold air less than 7 DEG C after unnecessary melt paraffin
The microcapsules of thing.
3rd step, the preparation of micro-capsule dispersion liquid：
Weigh 100 parts of water to be placed in dispersing apparatus, add micro- glue containing HMDI pre-polymer mixtures of parafilm wrap
150 parts of capsule, is uniformly dispersed, and the microcapsules for the microcapsules containing high water absorbent and macroporous absorbent resin that solid content is 60% are made
Dispersed liquid component.
A kind of preparation method of selfreparing water-base epoxy elastic composite coating material, complete as follows described in the present embodiment
Into：
Weigh 24 parts of aqueous epoxy resin emulsion, 5.5 parts of VAE emulsions, 5.5 parts of acrylic acid ester emulsion and system is mixed evenly
Into component A；
Weigh 24 parts of aqueous epoxy curing agent, 3 parts of talcum powder, 16 parts of rutile type titanium white, aqueous polyurethane thickener
0.4 part, 0.2 part of DC-71 defoamers, 0.3 part of DC-51 levelling agents, 0.2 part, 0.2 part antioxidant 264 of UV-2 ultra-violet absorbers,
20.7 parts of industry water, which is mixed evenly, is made B component；
Component C is 20 parts of micro-capsule dispersion liquid.
Above-mentioned tri- components of A, B, C are thoroughly mixed and obtain selfreparing water-base epoxy elastic composite coating material,
Can be sprayed or brushed can use brushing number to control in the surface of protected object, coating layer thickness≤200 μm, thickness.
Selfreparing water-base epoxy elastic composite applies coating material reference《JGT 335-2011 concrete structure protection film forming
Type coating》,《GB/T 1720-1979 paint film adhesion determination methods》、《GB/T 1731-1993 paint film flexibility determination methods》、
《GB/T1732-1993 paint film impact resistance determination methods》、《GB/T 1733-1993 paint film water resistance determination methods》Deng standard testing its
Properties are as shown in table 1：
The selfreparing water-base epoxy elastic composite coating material coating performance index of table 1.
Claims (8)
1. a kind of selfreparing water-base epoxy elastic composite coating material, it is characterized in that, it is formed and content is by mass fraction：
Component A：20~25 parts of aqueous epoxy resin emulsion, 7~5 parts of VAE emulsions, 8~5 parts of acrylic acid ester emulsion；
B component：20~25 parts of aqueous epoxy curing agent, 5~3 parts of talcum powder, 20~15 parts of rutile type titanium white, water-based poly- ammonia
0.6~0.3 part of ester thickener, 0.5~0.1 part of defoamer, 0.6~0.2 part of levelling agent, 0.4~0.2 part of ultra-violet absorber,
0.4~0.2 part of antioxidant, 17.5~21 parts of industry water；
Component C：15~22 parts of micro-capsule dispersion liquid；
The specific preparation method of wherein described micro-capsule dispersion liquid is as follows：
The first step, the preparation of HMDI pre-polymer mixtures：
(1) 25 parts of N220 polyoxypropylene polyols are weighed to be placed in reactor, 2 are dehydrated under conditions of 120 DEG C, -0.09Mpa
Hour, 75 parts of HMDI are added after being cooled to 50 DEG C, is warming up at 60 DEG C and reacts 1 hour, it is small to be then warming up to reaction 3.0 at 80 DEG C
Shi Hou, deaeration 1 hour under -0.09Mpa vacuum condition, produce-NCO group mass content be 23% HMDI performed polymers；
(2) latent curing agent and the fourth of tin dilaurate two and then under the protection of dry nitrogen, are added in the performed polymer that (1) obtains
Base tin catalyst, it is stirred 20 minutes, obtains the HMDI pre-polymer mixtures containing latent curing agent and catalyst, drying nitrogen
It is sealed under protection；Active hydrogen equivalent weight and HMDI pre-polymerization of the addition of wherein described latent curing agent according to this kind of latent curing agent
In body-NCO group mass content come specifically determine；Wherein, the addition of catalyst is the total matter of HMDI pre-polymer mixtures
The 0.5% of amount.
Second step, the preparation of microcapsules：
Under the protection of dry nitrogen, by 30 parts of high water absorbent, 70 parts of macroporous absorbent resin, in HMDI pre-polymerizations prepared by step (2)
Dipping reaches saturation in body mixture, then is dispersed in paraffin molten mass, after filtering out unnecessary melt paraffin, less than
The microcapsules containing HMDI pre-polymer mixtures of parafilm wrap are generated in 7 DEG C of drying cold air through being atomized quickly cooling.
3rd step, the preparation of micro-capsule dispersion liquid：
Weigh 100 parts of water to be placed in dispersing apparatus, add that step 2 prepares parafilm wrap contains HMDI pre-polymer mixtures
150 parts of microcapsules and be uniformly dispersed, be made solid content be 60% the microcapsules containing high water absorbent and macroporous absorbent resin
Micro-capsule dispersion liquid component.
2. a kind of selfreparing water-base epoxy elastic composite coating material according to claim 1, it is characterized in that：It is described water-based
Epoxy resin latex is that epoxide number is 0.21~0.23mol/100g, and solid content is 50% non-ionic water epoxy emulsion；Institute
The aqueous epoxy curing agent stated is that amine value is 0.22~0.24mol/100g, and solid content is 50% aqueous epoxy curing agent；Institute
It is the nonionic VAE emulsion that commercially available solid content is 50% to state VAE emulsions；The acrylate
Emulsion is the anionic acrylic ester polymer emulsion that commercially available solid content is 50%.
3. a kind of selfreparing water-base epoxy elastic composite coating material according to claim 1, it is characterized in that：Described purple
Ultraviolet absorbers, aqueous polyurethane thickener, antioxidant, defoamer, levelling agent are water miscible compound.
4. a kind of selfreparing water-base epoxy elastic composite coating material according to claim 1, it is characterized in that：Described
The isocyanic acid of 4,4'- dicyclohexyl methyl hydrides two that HMDI is purity >=99.5% ,-NCO group mass fraction is 31.8~32.1%
Ester；Described polyoxypropylene polyol is that relative molecular mass is 2000, and degree of functionality is 2 polyoxypropylene polyol
N220；Described latent curing agent refers to LCA-3000 types latent curing agent or ALT-101 latent curing agents.
5. a kind of selfreparing water-base epoxy elastic composite coating material according to claim 1, it is characterized in that：Described height
Water absorbing agent is the super absorbent resin of particle diameter≤40 μm；Described macroporous absorbent resin is that granularity is free of exchange base for 200 purposes
Roll into a ball and have the preparation of macroporous structure.
6. a kind of method of the selfreparing water-base epoxy elastic composite coating material prepared described in any one of claim 1 to 5, its
It is characterized in completing as follows：
The first step, by 20~25 parts above-mentioned of aqueous epoxy resin emulsion, 7~5 parts of VAE emulsions, 8~5 parts of acrylic acid ester emulsion
20~25 parts of the component A of composition and aqueous epoxy curing agent, 5~3 parts of talcum powder are 20~15 parts of rutile type titanium white, water-based
0.6~0.3 part of polyurethane thickener, 0.5~0.1 part of defoamer, 0.6~0.2 part of levelling agent, ultra-violet absorber 0.4~0.2
Part, 0.4~0.2 part of antioxidant, the B component of 17.5~21 parts of compositions of industry water is well mixed；
Second step, then be well mixed with the component C of obtained 15~22 parts of micro-capsule dispersion liquid, that is, selfreparing water-base epoxy is made
Elastic composite coating material.
7. a kind of method of selfreparing water-base epoxy elastic composite coating material according to claim 6, it is characterized in that：Institute
It is that epoxide number is 0.21~0.23mol/100g to state aqueous epoxy resin emulsion, and solid content is 50% non-ion aqueous epoxy
Emulsion；Described aqueous epoxy curing agent is that amine value is 0.22~0.24mol/100g, and the water-base epoxy that solid content is 50% is consolidated
Agent；The VAE emulsions are the nonionic VAE emulsions that commercially available solid content is 50%；It is described
Acrylic acid ester emulsion is the anionic acrylic ester polymer emulsion that commercially available solid content is 50%.
8. a kind of method of selfreparing water-base epoxy elastic composite coating material according to claim 6, it is characterized in that：Institute
Defoamer, aqueous polyurethane thickener, levelling agent, ultra-violet absorber, the antioxidant stated are water miscible compound.
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| CN110343459A (en) * | 2019-06-12 | 2019-10-18 | 苏州科技大学 | A kind of selfreparing polyurethane water-proof paint, preparation method and application |
| CN110564257A (en) * | 2019-09-27 | 2019-12-13 | 成都新柯力化工科技有限公司 | Durable self-repairing building coating and preparation method thereof |
| CN111100568A (en) * | 2019-12-24 | 2020-05-05 | 深圳昌茂粘胶新材料有限公司 | Polyurethane rubber film with high weather resistance and preparation method thereof |
| CN112179793A (en) * | 2020-10-10 | 2021-01-05 | 南京林业大学 | Multi-scale self-repairing and effect evaluation method for epoxy emulsified asphalt cold-recycling mixture |
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| CN113861908A (en) * | 2021-10-12 | 2021-12-31 | 山西凝固力新型材料股份有限公司 | Epoxy resin crack pouring adhesive for repairing cement concrete cracks and preparation method thereof |
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