CN110396345A - A kind of large arch dam waterborne epoxy coatings and the preparation method and application thereof - Google Patents
A kind of large arch dam waterborne epoxy coatings and the preparation method and application thereof Download PDFInfo
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- CN110396345A CN110396345A CN201910344295.7A CN201910344295A CN110396345A CN 110396345 A CN110396345 A CN 110396345A CN 201910344295 A CN201910344295 A CN 201910344295A CN 110396345 A CN110396345 A CN 110396345A
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- arch dam
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
- C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
- C08G59/06—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
- C08G59/063—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols with epihalohydrins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
Abstract
A kind of large arch dam waterborne epoxy coatings provided by the invention, includes the following parts by weight: 20-30 parts of aqueous epoxy resins, 20-30 parts of curing agent, 1-3 parts of surfactant, 1-5 parts of buffer, 1-10 parts of pigments and fillers, 1-3 parts of defoaming agent, 1-3 parts of flow improver additive.Waterborne epoxy coatings provided by the invention is by studying different aqueous epoxy resins and curing agent, zero VOC, large arch dam waterborne epoxy coatings is prepared, realize the technology of water paint high solid low viscosity, break through high solid solvent based coating can not Water-borne modification technical problem, it is further reduced VOC emission, meet national environmental protection policy, the industry that can need to provide heavy antisepsis for harbour machinery, ship and ocean platform etc. provides good protection.
Description
Technical field
The present invention relates to coating material field, in particular to a kind of large arch dam waterborne epoxy coatings and preparation method thereof with answer
With.
Background technique
Due to water-base resin material viscosity is high and high speed dispersion is easy to cause resin demulsification etc., water-base epoxy at present
The technique that water defibrination is widely used in coating in the fabrication process.The technique is cumbersome, and the manufacturing cycle is long, and energy consumption is high, in manufacturing process
It needs to add the auxiliary agent containing VOC, needs additional water, cause the solid content of product low, when coating application needs multiple coating
It can be only achieved ideal effect, energy consumption is high, and the period is long, and the water paint produced by the technique can only substitute oil product VOC
Coating greater than 420g/L cannot substitute other oil products for containing VOC (VOC is less than 420g/L).To further decrease life
Energy consumption and discharge of poisonous waste during production promote waterborne epoxy coatings quality, realize green production, need to coating material production
Technique improves.
Summary of the invention
Technical problem: in order to solve the defects of prior art, the present invention provides a kind of large arch dam waterborne epoxy coatings and
Preparation method and application.
Technical solution: a kind of large arch dam waterborne epoxy coatings provided by the invention includes the following parts by weight: aqueous
20-30 parts of epoxy resin, 20-30 parts of curing agent, 1-3 parts of surfactant, 1-5 parts of buffer, 1-10 parts of pigments and fillers, defoaming agent
1-3 parts, 1-3 parts of flow improver additive；The structural formula of the aqueous epoxy resins is as follows:
Wherein, R1-R11It is independently H, halogen, alkyl, naphthenic base, aryl, hydroxyl, ether, aliphatic radical.
Preferably, the structural formula of the aqueous epoxy resins is as follows:
As an improvement, the preparation method of the aqueous epoxy resins, comprising the following steps: in the presence of sodium hydroxide, Formulas I
Compound represented and excessive epoxychloropropane polymerization reaction to get；Reaction equation is as follows:
As an improvement, the preparation method of the aqueous epoxy resins, comprising the following steps: in the presence of sodium hydroxide, formula
II compound represented and excessive epoxychloropropane polymerization reaction to get；Reaction equation is as follows:
Preferably, Formulas I compound represented and epoxychloropropane are stirred and are heated, the dropwise addition when temperature is raised to 60-70 DEG C
Sodium hydrate aqueous solution is added dropwise at 70-80 DEG C in 2 hours；Temperature is improved to obtain viscous in 90-100 DEG C of holding 1-2h
Thick resin；Distilled water and toluene are added in viscous resin, stirring dissolves resin, and static layering removes water layer, toluene layer decompression
Be evaporated to get；Formulas I compound represented and the molar ratio of epoxychloropropane are n:(2n+2 to 2n+4)；Sodium hydrate aqueous solution
The content of middle sodium hydroxide is 0.5n-1.5n moles；The volume ratio of distilled water and toluene is 1:2.
As an improvement, the curing agent includes the following parts by weight: 1 parts by weight of methyl diphenylene diisocyanate,
Poly glycol monomethyl ether 2-3 parts by weight, 1 parts by weight of 1- 1-cyanoethyl-2-methylimidazole, dimethylethanolamine 2-3 parts by weight, shell are poly-
Sugared 2-10 parts by weight.
Preferably, the curing agent includes the following parts by weight: 1 parts by weight of methyl diphenylene diisocyanate are gathered
2.5 parts by weight of glycol monoethyl ether, 1 parts by weight of 1- 1-cyanoethyl-2-methylimidazole, 2.5 parts by weight of dimethylethanolamine, chitosan
4 parts by weight.
Wherein, the preparation method of the curing agent, comprising the following steps:
(1) methyl diphenylene diisocyanate is dissolved in methylene chloride, is heated to 50-60 DEG C of constant temperature, drop is compiled in side stirring
Enter glycol monoethyl ether, dripped off in 2h, drips off rear isothermal reaction 1-2h；
(2) it is warming up to 70-80 DEG C, reaction system stirs while adding 1- 1-cyanoethyl-2-methylimidazole, isothermal reaction 1-
2h；
(3) reaction system stirs while adding dimethylethanolamine, isothermal reaction 1-2h；
(4) reaction system stirs while adding chitosan, isothermal reaction 1-2h；Be down to room temperature to get.
The surfactant is polysorbas20, and the buffer is citric acid or ammonium dihydrogen phosphate, and the defoaming agent is AC-
288, the flow improver additive is chlorinated paraffin.
The utility model has the advantages that aqueous epoxy resins and curing agent that waterborne epoxy coatings provided by the invention is different by research,
Zero VOC, large arch dam waterborne epoxy coatings is prepared, realizes the technology of water paint high solid low viscosity, it is molten to break through high solid
Dosage form coating can not Water-borne modification technical problem, be further reduced VOC emission, meet national environmental protection policy, can be harbour machine
The industry that tool, ship and ocean platform etc. need to provide heavy antisepsis provides good protection.
Detailed description of the invention
Fig. 1 is the hydrogen spectrogram of aqueous epoxy resins produced by the present invention.
Specific embodiment
The present invention is further illustrated below.
The preparation of 1 large arch dam waterborne epoxy coatings of embodiment
Formula II compound represented and epoxychloropropane are stirred and are heated, and sodium hydroxide is added dropwise when temperature is raised to 65 DEG C
Aqueous solution is added dropwise at 75 DEG C in 2 hours；It improves temperature and obtains viscous resin in 95 DEG C of holding 1.5h；Viscous resin
Middle addition distilled water and toluene, stirring dissolve resin, static layering remove water layer, toluene layer evaporated under reduced pressure to get；Formulas I institute
The molar ratio of the compound and epoxychloropropane that show is n:2n+3；The content of sodium hydroxide is rubbed in sodium hydrate aqueous solution for 1n
You；The volume ratio of distilled water and toluene is 1:2.Wherein, 1 n.
Reaction product 918g, m/z=1004.5 are obtained, hydrogen spectrum is shown in Fig. 1.
The preparation of 2 large arch dam waterborne epoxy coatings of embodiment
Formula II compound represented and epoxychloropropane are stirred and are heated, and sodium hydroxide is added dropwise when temperature is raised to 60 DEG C
Aqueous solution is added dropwise at 70 DEG C in 2 hours；It improves temperature and obtains viscous resin in 90 DEG C of holding 2h；In viscous resin
Distilled water and toluene is added, stirring dissolves resin, and static layering removes water layer, toluene layer evaporated under reduced pressure to get；Shown in Formulas I
Compound and epoxychloropropane molar ratio be n:2n+；The content of sodium hydroxide is 0.5n moles in sodium hydrate aqueous solution；
The volume ratio of distilled water and toluene is 1:2.Wherein, 1 n.
Reaction product 906g, m/z=1004.5 are obtained, hydrogen spectrum is shown in Fig. 1.
The preparation of 3 large arch dam waterborne epoxy coatings of embodiment
Formula II compound represented and epoxychloropropane are stirred and are heated, and sodium hydroxide is added dropwise when temperature is raised to 70 DEG C
Aqueous solution is added dropwise at 80 DEG C in 2 hours；It improves temperature and obtains viscous resin in 100 DEG C of holding 1h；In viscous resin
Distilled water and toluene is added, stirring dissolves resin, and static layering removes water layer, toluene layer evaporated under reduced pressure to get；Shown in Formulas I
Compound and epoxychloropropane molar ratio be n:2n+4；The content of sodium hydroxide is rubbed in sodium hydrate aqueous solution for 1.5n
You；The volume ratio of distilled water and toluene is 1:2.Wherein, 1 n.
Reaction product 899g, m/z=1004.5 are obtained, hydrogen spectrum is shown in Fig. 1.
The preparation of 4 large arch dam water paint curing agent of embodiment
Large arch dam water paint curing agent, includes the following parts by weight: 1 weight of methyl diphenylene diisocyanate
Part, 2 parts by weight of poly glycol monomethyl ether, 1 parts by weight of 1- 1-cyanoethyl-2-methylimidazole, 2 parts by weight of dimethylethanolamine, shell are poly-
Sugared 2 parts by weight.
Preparation method, comprising the following steps:
(1) methyl diphenylene diisocyanate is dissolved in methylene chloride, is heated to 60 DEG C of constant temperature, side stirring, which is compiled, instills second
Glycol monomethyl ether drips off in 2h, drips off rear isothermal reaction 1h；
(2) 80 DEG C are warming up to, reaction system stirs while adding 1- 1-cyanoethyl-2-methylimidazole, isothermal reaction 1-2h；
(3) reaction system stirs while adding dimethylethanolamine, isothermal reaction 1h；
(4) reaction system stirs while adding chitosan, isothermal reaction 1h；Be down to room temperature to get.
The preparation of 5 large arch dam water paint curing agent of embodiment
Large arch dam water paint curing agent, includes the following parts by weight: 1 weight of methyl diphenylene diisocyanate
Part, 3 parts by weight of poly glycol monomethyl ether, 1 parts by weight of 1- 1-cyanoethyl-2-methylimidazole, 3 parts by weight of dimethylethanolamine, shell are poly-
Sugared 10 parts by weight.
Preparation method, comprising the following steps:
(1) methyl diphenylene diisocyanate is dissolved in methylene chloride, is heated to 50 DEG C of constant temperature, side stirring, which is compiled, instills second
Glycol monomethyl ether drips off in 2h, drips off rear isothermal reaction 2h；
(2) 70 DEG C are warming up to, reaction system stirs while adding 1- 1-cyanoethyl-2-methylimidazole, isothermal reaction 1-2h；
(3) reaction system stirs while adding dimethylethanolamine, isothermal reaction 2h；
(4) reaction system stirs while adding chitosan, isothermal reaction 2h；Be down to room temperature to get.
The preparation of 6 large arch dam water paint curing agent of embodiment
Large arch dam water paint curing agent, includes the following parts by weight: 1 weight of methyl diphenylene diisocyanate
Part, 2.5 parts by weight of poly glycol monomethyl ether, 1 parts by weight of 1- 1-cyanoethyl-2-methylimidazole, 2.5 parts by weight of dimethylethanolamine,
4 parts by weight of chitosan.
Preparation method, comprising the following steps:
(1) methyl diphenylene diisocyanate is dissolved in methylene chloride, is heated to 55 DEG C of constant temperature, side stirring, which is compiled, instills second
Glycol monomethyl ether drips off in 2h, drips off rear isothermal reaction 1.5h；
(2) 75 DEG C are warming up to, reaction system stirs while adding 1- 1-cyanoethyl-2-methylimidazole, isothermal reaction 1.5h；
(3) reaction system stirs while adding dimethylethanolamine, isothermal reaction 1.5h；
(4) reaction system stirs while adding chitosan, isothermal reaction 1.5h；Be down to room temperature to get.
The preparation of 7 large arch dam waterborne epoxy coatings of embodiment
A batch waterborne epoxy coatings, formula such as following table is made.
The performance for testing above-mentioned waterborne epoxy coatings, as a result see the table below.
| Number | Viscosity (applies -4 glasss, s) | Solid part % | Coating thickness | VOC |
| Sample 1 | 18±2 | 83 | 135 | 101 |
| Sample 2 | 19±2 | 82 | 127 | 127 |
| Sample 3 | 19±2 | 82 | 121 | 132 |
| Comparative example 1 | 22±2 | 80 | 108 | 169 |
| Comparative example 2 | 22±2 | 80 | 106 | 167 |
| Comparative example 3 | 21±2 | 81 | 104 | 172 |
| Comparative example 4 | 21±2 | 81 | 107 | 176 |
Claims (9)
1. a kind of large arch dam waterborne epoxy coatings, it is characterised in that: include the following parts by weight: aqueous epoxy resins 20-
30 parts, 20-30 parts of curing agent, 1-3 parts of surfactant, 1-5 parts of buffer, 1-10 parts of pigments and fillers, 1-3 parts of defoaming agent, flowing
1-3 parts of promotor；The structural formula of the aqueous epoxy resins is as follows:
Wherein, R1-R11It is independently H, halogen, alkyl, naphthenic base, aryl, hydroxyl, ether, aliphatic radical.
2. a kind of large arch dam waterborne epoxy coatings according to claim 1, it is characterised in that: the aqueous epoxy resins
Structural formula is as follows:
3. a kind of large arch dam waterborne epoxy coatings according to claim 1, it is characterised in that: the aqueous epoxy resins
Preparation method, comprising the following steps: in the presence of sodium hydroxide, Formulas I compound represented polymerize with excessive epoxychloropropane
Reaction to get；Reaction equation is as follows:
4. a kind of large arch dam waterborne epoxy coatings according to claim 1, it is characterised in that: the aqueous epoxy resins
Preparation method, comprising the following steps: in the presence of sodium hydroxide, Formula II compound represented polymerize with excessive epoxychloropropane
Reaction to get；Reaction equation is as follows:
。
5. a kind of large arch dam waterborne epoxy coatings according to claim 3 or 4, it is characterised in that: Formulas I compound represented
It with epoxychloropropane, stirs and heats, sodium hydrate aqueous solution is added dropwise when temperature is raised to 60-70 DEG C, in 2 at 70-80 DEG C
It is added dropwise in hour；It improves temperature and obtains viscous resin in 90-100 DEG C of holding 1-2h；In viscous resin be added distilled water and
Toluene, stirring dissolve resin, static layering remove water layer, toluene layer evaporated under reduced pressure to get；Formulas I compound represented and ring
The molar ratio of oxygen chloropropane is n:(2n+2 to 2n+4)；The content of sodium hydroxide is rubbed in sodium hydrate aqueous solution for 0.5n-1.5n
You；The volume ratio of distilled water and toluene is 1:2.
6. a kind of large arch dam waterborne epoxy coatings according to claim 1, it is characterised in that: the curing agent includes following
The component of parts by weight: 1 parts by weight of methyl diphenylene diisocyanate, poly glycol monomethyl ether 2-3 parts by weight, 1- cyanoethyl -2-
1 parts by weight of methylimidazole, dimethylethanolamine 2-3 parts by weight, chitosan 2-10 parts by weight.
7. a kind of large arch dam waterborne epoxy coatings according to claim 1, it is characterised in that: the curing agent includes following
The component of parts by weight: 1 parts by weight of methyl diphenylene diisocyanate, 2.5 parts by weight of poly glycol monomethyl ether, 1- cyanoethyl -2-
1 parts by weight of methylimidazole, 2.5 parts by weight of dimethylethanolamine, 4 parts by weight of chitosan.
8. a kind of large arch dam waterborne epoxy coatings according to claim 1, it is characterised in that: the preparation side of the curing agent
Method, comprising the following steps:
(1) methyl diphenylene diisocyanate is dissolved in methylene chloride, is heated to 50-60 DEG C of constant temperature, side stirring, which is compiled, instills second
Glycol monomethyl ether drips off in 2h, drips off rear isothermal reaction 1-2h；
(2) it is warming up to 70-80 DEG C, reaction system stirs while adding 1- 1-cyanoethyl-2-methylimidazole, isothermal reaction 1-2h；
(3) reaction system stirs while adding dimethylethanolamine, isothermal reaction 1-2h；
(4) reaction system stirs while adding chitosan, isothermal reaction 1-2h；Be down to room temperature to get.
9. a kind of large arch dam waterborne epoxy coatings according to claim 1, it is characterised in that: the surfactant is to spit
Temperature 20, the buffer are citric acid or ammonium dihydrogen phosphate, and the defoaming agent is AC-288, and the flow improver additive is chlorination stone
Wax.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112646123A (en) * | 2020-12-18 | 2021-04-13 | 江西瀚泰新材料科技有限公司 | Low-viscosity water-based epoxy resin and preparation method thereof |
| CN113307984A (en) * | 2021-04-29 | 2021-08-27 | 广西桂林荣鑫新材料科技有限公司 | Preparation method of aqueous epoxy resin dispersion |
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| CN113307984A (en) * | 2021-04-29 | 2021-08-27 | 广西桂林荣鑫新材料科技有限公司 | Preparation method of aqueous epoxy resin dispersion |
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