CN111793192A - Novel anticorrosive waterborne epoxy modified curing agent and preparation method thereof - Google Patents
Novel anticorrosive waterborne epoxy modified curing agent and preparation method thereof Download PDFInfo
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- CN111793192A CN111793192A CN202010712473.XA CN202010712473A CN111793192A CN 111793192 A CN111793192 A CN 111793192A CN 202010712473 A CN202010712473 A CN 202010712473A CN 111793192 A CN111793192 A CN 111793192A
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 52
- 239000004593 Epoxy Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003822 epoxy resin Substances 0.000 claims abstract description 25
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 25
- 150000001412 amines Chemical class 0.000 claims abstract description 19
- 229920000768 polyamine Polymers 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 8
- 238000005260 corrosion Methods 0.000 claims abstract description 8
- 230000007797 corrosion Effects 0.000 claims abstract description 8
- 125000002723 alicyclic group Chemical group 0.000 claims abstract description 7
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003085 diluting agent Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- RNLHGQLZWXBQNY-UHFFFAOYSA-N 3-(aminomethyl)-3,5,5-trimethylcyclohexan-1-amine Chemical group CC1(C)CC(N)CC(C)(CN)C1 RNLHGQLZWXBQNY-UHFFFAOYSA-N 0.000 claims description 5
- FQYUMYWMJTYZTK-UHFFFAOYSA-N Phenyl glycidyl ether Chemical group C1OC1COC1=CC=CC=C1 FQYUMYWMJTYZTK-UHFFFAOYSA-N 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 4
- YSUQLAYJZDEMOT-UHFFFAOYSA-N 2-(butoxymethyl)oxirane Chemical compound CCCCOCC1CO1 YSUQLAYJZDEMOT-UHFFFAOYSA-N 0.000 claims description 4
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 claims description 4
- -1 alkyl glycidyl ether Chemical compound 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 4
- 229920001451 polypropylene glycol Polymers 0.000 claims description 4
- 229960001124 trientine Drugs 0.000 claims description 4
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 3
- BEGLCMHJXHIJLR-UHFFFAOYSA-N methylisothiazolinone Chemical compound CN1SC=CC1=O BEGLCMHJXHIJLR-UHFFFAOYSA-N 0.000 claims description 3
- QNYBOILAKBSWFG-UHFFFAOYSA-N 2-(phenylmethoxymethyl)oxirane Chemical compound C1OC1COCC1=CC=CC=C1 QNYBOILAKBSWFG-UHFFFAOYSA-N 0.000 claims description 2
- NOYXQFBTCCSKQG-UHFFFAOYSA-N 2-[[2-(oxiran-2-ylmethoxy)cyclohexyl]oxymethyl]oxirane Chemical compound C1OC1COC1CCCCC1OCC1CO1 NOYXQFBTCCSKQG-UHFFFAOYSA-N 0.000 claims description 2
- PORQOHRXAJJKGK-UHFFFAOYSA-N 4,5-dichloro-2-n-octyl-3(2H)-isothiazolone Chemical compound CCCCCCCCN1SC(Cl)=C(Cl)C1=O PORQOHRXAJJKGK-UHFFFAOYSA-N 0.000 claims description 2
- 229940100484 5-chloro-2-methyl-4-isothiazolin-3-one Drugs 0.000 claims description 2
- DHNRXBZYEKSXIM-UHFFFAOYSA-N chloromethylisothiazolinone Chemical group CN1SC(Cl)=CC1=O DHNRXBZYEKSXIM-UHFFFAOYSA-N 0.000 claims description 2
- 125000003916 ethylene diamine group Chemical group 0.000 claims description 2
- 230000003449 preventive effect Effects 0.000 claims description 2
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 claims description 2
- 229940100555 2-methyl-4-isothiazolin-3-one Drugs 0.000 claims 1
- 150000002576 ketones Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000000576 coating method Methods 0.000 description 18
- 239000011248 coating agent Substances 0.000 description 16
- 239000003973 paint Substances 0.000 description 7
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229920006334 epoxy coating Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000019445 benzyl alcohol Nutrition 0.000 description 2
- GEQHKFFSPGPGLN-UHFFFAOYSA-N cyclohexane-1,3-diamine Chemical compound NC1CCCC(N)C1 GEQHKFFSPGPGLN-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- MHZGKXUYDGKKIU-UHFFFAOYSA-N Decylamine Chemical compound CCCCCCCCCCN MHZGKXUYDGKKIU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical class C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/504—Amines containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen
-
- 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
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1477—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing nitrogen
-
- 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
-
- 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
- C09D5/08—Anti-corrosive paints
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Epoxy Resins (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a novel anticorrosive waterborne epoxy modified curing agent and a preparation method thereof, wherein the waterborne epoxy modified curing agent comprises the following components in percentage by mass: 23-30% of epoxy resin, 10-15% of solvent, 5-10% of long-chain amine, 20-27% of alicyclic polyamine, 5-9% of aliphatic polyamine, 11-15% of diglycidyl ether and 6-13% of reactive diluent. The waterborne epoxy modified curing agent provided by the invention has the advantages of excellent corrosion resistance, simple preparation method and cost saving.
Description
Technical Field
The invention belongs to the field of water-based paint, and particularly relates to a novel anticorrosive water-based epoxy modified curing agent and a preparation method thereof.
Background
The water-based epoxy resin is widely used as a coating together with a curing agent. The general epoxy coating system is a film forming substance formed by water-based epoxy resin and a water-based epoxy curing agent, and the structural characteristics and the solvent content of the water-based epoxy curing agent play a key role in the film coating performance and the total Volatile Organic Compounds (VOC) of the coating.
The waterborne epoxy resin coating is widely applied to corrosion prevention, and after a long time of development, the waterborne epoxy anticorrosive coating is applied to the field related to solvent type epoxy anticorrosive coatings, and even the waterborne epoxy anticorrosive coating is listed as a heavy anticorrosive coating abroad, so that the waterborne epoxy resin coating is widely applied to the fields of aviation, ships, chemical engineering, oil pipelines, steel structures, bridges, oil drilling platforms and the like.
The existing waterborne epoxy curing agent still has common corrosion resistance, and the preparation process is not simple enough, so that the requirement of practical application cannot be met.
In summary, how to design a novel anticorrosive waterborne epoxy modified curing agent is not only excellent in anticorrosive performance, but also simple in preparation method, and is a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to solve the technical problems that the existing waterborne epoxy curing agent has common corrosion resistance and is not simple enough in preparation process, and provides a novel anticorrosive waterborne epoxy modified curing agent which is excellent in corrosion resistance, simple in preparation method and low in cost.
The invention realizes the aim through the following technical scheme, and provides a novel anticorrosive waterborne epoxy modified curing agent which comprises the following components in percentage by mass: 23-30% of epoxy resin, 10-15% of solvent, 5-10% of long-chain amine, 20-27% of alicyclic polyamine, 5-9% of aliphatic polyamine, 11-15% of diglycidyl ether and 6-13% of reactive diluent.
Furthermore, the epoxy value of the epoxy resin is 0.4-0.55, the epoxy resin is bisphenol A epoxy resin or hydrogenated epoxy resin, the bisphenol A epoxy resin is general epoxy resin with excellent performance, and the hydrogenated epoxy resin can improve the weather resistance of the coating.
Further, the long-chain amine is C10-C18 fatty amine or polyether amine, and the molecular weight of the polyether amine is 230-400. The long-chain amine is used for chain extension, and the flexibility and the impact resistance of a system can be improved after the long-chain amine is grafted into the epoxy resin.
Further, the alicyclic polyamine is isophorone diamine or 1, 3-cyclohexane dimethylamine, the aliphatic polyamine is ethylene diamine, diethylene triamine, triethylene tetramine or tetraethylene pentamine, and the alicyclic polyamine and the aliphatic polyamine can increase the hardness and the weather resistance of the paint film.
Further, the coating also comprises 0.2-1% of a mildew inhibitor, wherein the mildew inhibitor is 5-chloro-2-methyl-4-isothiazoline-3-ketone, 2-methyl-4-isothiazoline-3-ketone or 4, 5-dichloro-2-n-octyl-4-isothiazolinone, so that a paint film has good mildew and stain resistance.
Further, the diglycidyl ether is polyethylene glycol diglycidyl ether, 1, 2-cyclohexanediol diglycidyl ether or polypropylene glycol diglycidyl ether, and is used for system chain extension.
Further, the reactive diluent is phenyl glycidyl ether, benzyl glycidyl ether, butyl glycidyl ether or C12-14 alkyl glycidyl ether.
Further, the solvent is benzyl alcohol, methylbenzenes or ketone solvents.
A preparation method of a novel anticorrosive waterborne epoxy modified curing agent comprises the following steps:
(1) under a normal temperature, adding 23-30% of epoxy resin into 10-15% of solvent according to mass percentage, stirring and dissolving, then dropwise adding 5-10% of long-chain amine, heating to 60-90 ℃, and reacting for 1-3 h;
(2) respectively mixing and heating 20-27% of alicyclic polyamine and 5-9% of aliphatic polyamine according to the mass percentage to 50-90 ℃, then dripping the material in the step (1) under the stirring condition, reacting for 3-5 h, then adding 11-15% of diglycidyl ether and 6-13% of reactive diluent, and preserving heat for 1-2 h to obtain the finished product.
Further, the above preparation method further comprises: and (3) cooling the material in the step (2) to 20-40 ℃, adding 0.2-1% of mildew preventive, and stirring for 30-60 min to obtain a finished product.
The invention has the beneficial effects that:
(1) the novel anticorrosive waterborne epoxy modified curing agent provided by the invention is modified by epoxy resin, so that a paint film of the novel anticorrosive waterborne epoxy modified curing agent is excellent in anticorrosive performance;
(2) according to the invention, the epoxy resin is connected with the long-chain amine chain segment, and a series of chain extension reactions are carried out, so that the paint film has good toughness and strong impact resistance;
(3) the preparation method is simple, the reaction condition is mild, and the cost is saved.
Detailed Description
The technical solutions of the present invention will be described clearly and completely by the following specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a novel anticorrosive waterborne epoxy modified curing agent, and the components of the curing agent and the mass of each component are as follows:
| components | Mass/gram |
| Bisphenol A epoxy resin | 23 |
| Acetone (II) | 15 |
| Hexadecyl amine | 5 |
| 1, 3-Cyclohexanediamine | 20 |
| Ethylene diamine | 9 |
| Polyethylene glycol diglycidyl ether | 15 |
| Butyl glycidyl ether | 13 |
| Total of | 100 |
In this example, the epoxy value of the bisphenol A epoxy resin was 0.45.
The embodiment also provides a preparation method of the novel anticorrosive waterborne epoxy modified curing agent, which comprises the following steps:
(1) under normal temperature, adding 23 g of bisphenol A epoxy resin into 15 g of acetone, stirring and dissolving, then dropwise adding 5 g of hexadecylamine, heating to 60 ℃, and reacting for 1 h;
(2) respectively mixing 20 g of 1, 3-cyclohexanediamine and 9 g of ethylenediamine, heating to 50 ℃, dropwise adding the material in the step (1) under the stirring condition, reacting for 3 hours, adding 15 g of polyethylene glycol diglycidyl ether and 13 g of butyl glycidyl ether, and preserving heat for 1 hour to obtain a finished product.
Example 2
The embodiment provides a novel anticorrosive waterborne epoxy modified curing agent, and the components of the curing agent and the mass of each component are as follows:
in this example, the epoxy value of the bisphenol a epoxy resin was 0.5.
The embodiment also provides a preparation method of the novel anticorrosive waterborne epoxy modified curing agent, which comprises the following steps:
(1) under normal temperature, 27 g of bisphenol A epoxy resin is added into 12 g of benzyl alcohol to be stirred and dissolved, then 8 g of dodecylamine is dripped, the temperature is heated to 75 ℃, and the reaction lasts for 2 hours;
(2) respectively mixing 23 g of isophorone diamine and 7 g of diethylenetriamine, heating to 70 ℃, then dripping the material in the step (1) under the stirring condition, reacting for 4h, adding 13 g of polyethylene glycol diglycidyl ether and 9.3 g of phenyl glycidyl ether, and preserving heat for 1 h;
(3) and (3) cooling the material in the step (2) to 20 ℃, adding 0.7 g of 2-methyl-4-isothiazoline-3-ketone, and stirring for 30min to obtain a finished product.
Example 3
The embodiment provides a novel anticorrosive waterborne epoxy modified curing agent, and the components of the curing agent and the mass of each component are as follows:
| components | Mass/gram |
| Hydrogenated epoxy resins | 30 |
| Benzyl alcohol | 10 |
| Polyether amine | 10 |
| Isophoronediamine | 27 |
| Triethylenetetramine | 5 |
| Polypropylene glycol diglycidyl ether | 11 |
| Phenyl glycidyl ether | 6 |
| 5-chloro-2-methyl-4-isothiazolin-3-one | 1 |
| Total of | 100 |
In this example, the epoxy value of the hydrogenated epoxy resin was 0.53 and the molecular weight of the polyetheramine was 300.
The embodiment also provides a preparation method of the novel anticorrosive waterborne epoxy modified curing agent, which comprises the following steps:
(1) under normal temperature, adding 30 g of hydrogenated epoxy resin into 10 g of benzyl alcohol, stirring and dissolving, then dropwise adding 10 g of polyether amine, heating to 90 ℃, and reacting for 3 h;
(2) respectively mixing 27 g of isophorone diamine and 5 g of triethylene tetramine, heating to 80 ℃, then dropwise adding the material in the step (1) under the stirring condition, reacting for 5 hours, adding 11 g of polypropylene glycol diglycidyl ether and 6 g of phenyl glycidyl ether, and preserving heat for 1.5 hours;
(3) and (3) cooling the material in the step (2) to 30 ℃, adding 1 g of 5-chloro-2-methyl-4-isothiazoline-3-ketone, and stirring for 60min to obtain a finished product.
The application of the waterborne epoxy modified curing agent in the waterborne epoxy coating comprises the following steps:
the waterborne epoxy modified curing agent prepared in the embodiments 1-3 is applied to a coating together with a main agent 6069A-4, wherein the main agent 6069A-4 is an epoxy resin self-made by Yongcheng Shuihuan chemical industry Co., Ltd.
Preparing a main agent 6069A-4 and the prepared waterborne epoxy modified curing agent into a waterborne epoxy coating according to the mass ratio of 1/0.6, preparing a sample plate from the prepared coating according to a national standard method, and detecting the film coating performance of the sample plate, wherein the main performance indexes are as follows:
the test is totally 6 items, and the coating prepared from the waterborne epoxy modified curing agent has excellent physical and chemical properties through the expression of main technical indexes in the test results in the table, and all parameters far exceed relevant standards.
The waterborne epoxy modified curing agent prepared by the invention is widely applied to various fields of anticorrosive coatings, and is particularly recommended to be used on anticorrosive paint for ship waterlines, and the above detection items all meet the internal standard of GB/T9260-2008 'ship waterline paint'.
Comparative examples 1 to 3
With reference to example 2, three sets of comparative examples were provided, with the curing agent components and the mass of each component being as follows, adjusted for the mass percent ranges of epoxy resin and long chain amine:
the curing agent prepared in the comparative examples 1-3 is mixed with a main agent 6069A-4 self-made by Yongcheng Shuihu chemical Co., Ltd to prepare the water-based epoxy coating, wherein the mass ratio of the main agent to the curing agent is 1/0.6. Preparing a sample plate from the prepared coating according to a national standard method and detecting the coating performance of the sample plate, wherein the detection method is the same as that of the embodiment 1-3, and the main performance indexes are as follows:
through the performance of the main technical indexes in the table, it can be known that most performance indexes of the coating prepared by the water-based epoxy curing agent in the comparative examples 1-3 are lower than the standard value, and although individual physical and chemical properties reach the standard, the performance is general and the corrosion resistance is poor. Therefore, the epoxy resin in the standard formula is connected with the long-chain amine chain segment, and the excellent corrosion resistance of the curing agent can be ensured.
The invention has the beneficial effects that: the waterborne epoxy modified curing agent provided by the invention can effectively improve the corrosion resistance of the coating, and has the advantages of simple preparation process and cost saving.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or some technical features thereof can be replaced. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The novel anticorrosive waterborne epoxy modified curing agent is characterized by comprising the following components in percentage by mass: 23-30% of epoxy resin, 10-15% of solvent, 5-10% of long-chain amine, 20-27% of alicyclic polyamine, 5-9% of aliphatic polyamine, 11-15% of diglycidyl ether and 6-13% of reactive diluent.
2. The novel anticorrosive waterborne epoxy modified curing agent as claimed in claim 1, wherein the epoxy value of the epoxy resin is 0.4-0.55, and the epoxy resin is bisphenol A epoxy resin or hydrogenated epoxy resin.
3. The novel anticorrosive waterborne epoxy modified curing agent as claimed in claim 1, wherein the long-chain amine is C10-C18 fatty amine or polyether amine, and the molecular weight of the polyether amine is 230-400.
4. The novel corrosion-resistant waterborne epoxy modified curing agent of claim 1, wherein the cycloaliphatic polyamine is isophorone diamine or 1, 3-cyclohexane dimethylamine and the aliphatic polyamine is ethylene diamine, diethylene triamine, triethylene tetramine or tetraethylene pentamine.
5. The novel anticorrosive water-based epoxy modified curing agent according to claim 1, further comprising 0.2-1% of a mildew inhibitor, wherein the mildew inhibitor is 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one or 4, 5-dichloro-2-n-octyl-4-isothiazolin-one.
6. The novel anticorrosive waterborne epoxy modified curing agent of claim 1, wherein the diglycidyl ether is polyethylene glycol diglycidyl ether, 1, 2-cyclohexanediol diglycidyl ether, or polypropylene glycol diglycidyl ether.
7. The novel preserved waterborne epoxy modified curing agent of claim 1, wherein the reactive diluent is phenyl glycidyl ether, benzyl glycidyl ether, butyl glycidyl ether or C12-14 alkyl glycidyl ether.
8. The novel anticorrosive waterborne epoxy modified curing agent of claim 1, wherein the solvent is benzyl alcohol, toluenes or ketones.
9. A preparation method of the novel anticorrosive water-based epoxy modified curing agent as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
(1) under a normal temperature, adding 23-30% of epoxy resin into 10-15% of solvent according to mass percentage, stirring and dissolving, then dropwise adding 5-10% of long-chain amine, heating to 60-90 ℃, and reacting for 1-3 h;
(2) respectively mixing and heating 20-27% of alicyclic polyamine and 5-9% of aliphatic polyamine according to the mass percentage to 50-90 ℃, then dripping the material in the step (1) under the stirring condition, reacting for 3-5 h, then adding 11-15% of diglycidyl ether and 6-13% of reactive diluent, and preserving heat for 1-2 h to obtain the finished product.
10. The method for preparing the novel anticorrosive water-based epoxy modified curing agent according to claim 9, further comprising: and (3) cooling the material in the step (2) to 20-40 ℃, adding 0.2-1% of mildew preventive, and stirring for 30-60 min to obtain a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010712473.XA CN111793192A (en) | 2020-07-22 | 2020-07-22 | Novel anticorrosive waterborne epoxy modified curing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010712473.XA CN111793192A (en) | 2020-07-22 | 2020-07-22 | Novel anticorrosive waterborne epoxy modified curing agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111793192A true CN111793192A (en) | 2020-10-20 |
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| CN114479736A (en) * | 2022-02-17 | 2022-05-13 | 东方雨虹民用建材有限责任公司 | Environment-friendly seam beautifying agent |
| CN114507334A (en) * | 2022-02-17 | 2022-05-17 | 东方雨虹民用建材有限责任公司 | Preparation method and application of benzyl alcohol-free system curing agent |
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