CN117511344A - Water-based epoxy resin composition and preparation method and application thereof - Google Patents

Water-based epoxy resin composition and preparation method and application thereof Download PDF

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Publication number
CN117511344A
CN117511344A CN202311594916.XA CN202311594916A CN117511344A CN 117511344 A CN117511344 A CN 117511344A CN 202311594916 A CN202311594916 A CN 202311594916A CN 117511344 A CN117511344 A CN 117511344A
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China
Prior art keywords
epoxy resin
resin composition
aqueous
amine
group
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CN202311594916.XA
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Chinese (zh)
Inventor
刘玄
罗丛叶
牟昌盛
刘大伟
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Wanhua Chemical Group Co Ltd
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Wanhua Chemical Group Co Ltd
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Priority to CN202311594916.XA priority Critical patent/CN117511344A/en
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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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Epoxy Resins (AREA)

Abstract

The invention discloses a water-based epoxy resin composition, a preparation method and application thereof, wherein the composition comprises the following raw materials in parts by weight: 35-80%, preferably 40-80%, more preferably 50-70%, 5-20%, preferably 5-15%, more preferably 5-10%, 1-20%, preferably 5-20%, more preferably 5-10%, cyclic carbonate, 10-50%, preferably 10-40%, more preferably 20-40% aqueous secondary amine curative. The composition not only has long operation time, but also can be completely dried in a short time after construction, and has good adhesion on metal and concrete surfaces and very good water resistance and salt spray resistance.

Description

Water-based epoxy resin composition and preparation method and application thereof
Technical Field
The invention relates to an epoxy resin composition, in particular to a water-based epoxy resin composition, a preparation method and application thereof.
Background
The water-based epoxy paint is an environment-friendly paint, and the performance of the water-based epoxy paint mainly depends on the water-based curing agent. In the process of synthesizing the aqueous curing agent, in order to ensure that the aqueous curing agent has enough operation time, high-activity primary amine in the aqueous curing agent is often blocked to form secondary amine groups, but under the condition of more primary amine blocking, the post-curing performance of the aqueous curing agent is obviously insufficient, and an accelerator cannot be directly added, so that the crosslinking density of the aqueous curing agent is insufficient, and the adhesive force, the water resistance and the salt spray resistance are insufficient.
To solve the above problems, organosilicon compounds are often introduced as coupling agents into aqueous epoxy coating systems, but the direct addition of organosilicon compounds with primary amino groups to aqueous coatings can severely lead to the operating times of aqueous coatings.
Patent DE69915740T2 solves the problem of the operating time of aqueous curing agents by preparing curable resin systems from organosilicon compounds containing ketimine endcaps, but such a solution does not solve the problem of insufficient post-curing properties of secondary amine groups present in the aqueous curing agent and toughness of the curing agent, severely affecting the crosslinking density of the system.
Therefore, on the basis of ensuring that the water-based curing agent has longer operation time, how to improve the post-curing performance of the water-based epoxy coating and how to improve the adhesive force, water resistance and salt spray resistance is a technical difficulty.
Disclosure of Invention
In order to solve the technical problems, the invention provides a water-based epoxy resin composition, and a preparation method and application thereof. The composition not only has long operation time, but also can be completely dried in a short time after construction, and has good adhesion on metal and concrete surfaces and very good water resistance and salt spray resistance.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an aqueous epoxy resin composition comprises the following raw materials in parts by weight:
the aqueous epoxy resin is used in the range of 35 to 80%, preferably 40 to 80%, more preferably 50 to 70%,
ketimine terminated hydrolyzable silane 5-20%, preferably 5-15%, more preferably 5-10%,
the cyclic carbonate is present in an amount of 1 to 20%, preferably 5 to 20%, more preferably 5 to 10%,
the aqueous secondary amine curing agent is 10 to 50%, preferably 10 to 40%, more preferably 20 to 40%.
As a preferable embodiment of the present invention, the aqueous epoxy resin is one or more selected from bisphenol a epoxy resin, bisphenol F epoxy resin, novolac epoxy resin, glycidyl ether type epoxy resin, and glycidyl amine type epoxy resin;
preferably, the water-based epoxy resin is an epoxy emulsion with a solid content of 40-70% and an epoxy equivalent of 300-1500, preferably at least one of epoxy resin E20 and epoxy resin E51, more preferably at least one of wantopro 0906, wantopro 0901 and Nantong star epoxy emulsion 0912A;
as a preferred embodiment of the present invention, the ketimine terminated hydrolyzable silane is the reaction product of a primary amine group containing hydrolyzable silane with an aldehyde/ketone compound;
preferably, the primary amine group-containing hydrolyzable silane is one or more of 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, 3-aminopropyl methyldimethoxysilane, aminopropyl methyldiethoxysilane, N- (β -aminoethyl) - γ -aminopropyl trimethyloxy silane, N-aminoethyl-3-aminopropyl methyldimethoxysilane, diethylenetriaminopropyl trimethoxysilane;
preferably, the aldehyde/ketone compound is one or more of formaldehyde, paraformaldehyde, benzaldehyde, acetaldehyde, valeraldehyde, caprylaldehyde, phenylacetaldehyde, glyoxal, malondialdehyde, glyoxal, acetone, butanone, acetophenone, methyl isobutyl ketone, cyclohexanone.
As a preferable scheme of the invention, the cyclic carbonate is one or more of ethylene carbonate, propylene carbonate, butylene carbonate and dicyclo carbonate.
As a preferred embodiment of the present invention, the aqueous secondary amine curing agent is a blocked primary amine curing agent, preferably the reaction product of a polyamine and an amino-containing reactive group-containing material as a blocking agent.
As a preferred embodiment of the present invention, the polyamine is selected from one or more of aliphatic amine, alicyclic amine, aromatic amine, polyether amine and their modified products, and the end-capping agent is selected from one or more of epoxy group-containing, unsaturated hydrocarbon group, carboxyl group, aldehyde group and ketone group-containing substances.
As a preferred embodiment of the present invention, one or more of aliphatic amine ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentylene diamine, methylpentanediamine, hexamethylenediamine, N- (2-ethylamino) -1, 3-propylenediamine, N' -di (3-aminopropyl) -1, 2-ethylenediamine;
preferably, the alicyclic amine is isophorone diamine, 1, 3-cyclohexanediamine, 4' -diaminodicyclohexylmethane, 3' -dimethyl-4, 4' -diaminodicyclohexylmethane, 1-methyl-2, 4-cyclohexanediamine, 1, 2-diaminocyclohexane, N-cyclohexyl-1, 3-propanediamine, cyclohexylamine, N 1 - (3-aminopropyl) -N 3 -one or more of cyclohexyl-1, 3-propanediamine;
preferably, the aromatic amine is one or more of diaminodiphenylmethane, m-xylylenediamine, toluenediamine and diethyltoluenediamine;
preferably, the polyetheramine is one or more of Wanamine8100, wanamine8200, jeffamine D2000, jeffamine T403, jeffamine D220, jeffamine D400, jeffamine T5000;
preferably, the modified product of the polyamine may be a modified amine compound obtained by chemical modification of: mannich modification, amidation, epoxy addition, and the like.
Preferably, the end-capping agent is selected from one or more of epoxy resin, glycidyl ether, glycidyl amine, acrylic ester, formaldehyde, paraformaldehyde, benzaldehyde, acetaldehyde, valeraldehyde, caprylic aldehyde, phenylacetaldehyde, glyoxal, malondialdehyde, glyoxal, acetone, butanone, acetophenone, methyl isobutyl ketone, cyclohexanone.
In the present invention, the aqueous epoxy resin composition further optionally includes one or more of pigment filler, dispersant, leveling agent, defoamer, wetting agent, flame retardant, diluent as an additive.
As the pigment and filler suitable for the present invention, pigment and filler components known in the paint field such as calcium carbonate, barium sulfate, silica micropowder, titanium pigment, carbon black, talc, nanoclay, graphite and the like can be selected;
as the dispersant suitable for the present invention, BYK-190, BYK-192, etc. may be selected.
As leveling agents suitable for the present invention, BYK-333, TEGO Glide 407, etc. may be selected.
As the antifoaming agent suitable for the present invention, BYK-012, BYK-028, tego FOAMEX 810 and the like can be selected.
As the wetting agent suitable for the present invention, tego270, tego4100, or the like can be selected.
As the flame retardant suitable for the present invention, sodium silicate, DOPO system flame retardant and the like can be selected.
As the diluent suitable for the present invention, propylene glycol methyl ether, ethylene glycol butyl ether, etc. may be selected.
The invention also provides a preparation method of the aqueous epoxy resin composition, which is characterized in that the aqueous epoxy resin composition is obtained by mixing and stirring the components of the aqueous epoxy resin, the ketimine terminated hydrolyzable silane, the cyclic carbonate and the aqueous secondary amine curing agent according to the weight ratio.
The invention also provides an application of the aqueous epoxy resin composition in an aqueous coating.
The beneficial effects of the invention are as follows:
the hydrolyzable silane is blocked and hydrolyzed to release primary amine groups after film formation, so that the method has long operation time, and the cyclic carbonate can react with the primary amine groups rapidly during film formation, so that the drying time and crosslinking density of a paint film are improved in a short time, and the problem that the operation time and the drying speed of the prior art cannot be considered is solved.
The aqueous epoxy resin in the scheme of the invention has strong post-curing performance and better system compatibility, so that a paint film has better mechanical property and thermal property and better adhesive force on the surfaces of metal and concrete.
Detailed Description
The invention will now be further illustrated by means of specific examples which are given solely by way of illustration of the invention and do not limit the scope thereof.
The names, abbreviations and sources of the main chemicals used in the examples of the present invention are shown in the following table. The reagents used were all chemically pure unless indicated otherwise.
The main raw material information related to the following embodiments is shown in table 1:
TABLE 1 Main raw Material information
Chemical name Source
Triethylene tetramine, diethylene triamine, 593 curing agent, m-xylylenediamine Inock
Butyl glycidyl ether New distance Anhui
Epoxy resin E51 Nanya resin
Gamma-aminopropyl triethoxy silane Inock
N- (beta-aminoethyl) -gamma-aminopropyl trimethoxysilane Inock
3-Aminopropyltrimethoxysilane Inock
Paraformaldehyde, butyraldehyde, butanone and methyl isobutyl ketone Inock
Carbonic acidVinyl ester, propylene carbonate and butylene carbonate Inock
Dimer acid Radix seu herba Lespedezae Cuneatae
Isophorone diamine (IPDA) Wanhua chemistry
Hydroxy ethyl acrylate Wanhua chemistry
Epoxy emulsion pentapro 0906 Wanhua chemistry
Epoxy emulsion 0912A Nantong star
The main test method adopted by the invention is as follows:
(1) Operating time: the viscosity of the material at 25 ℃ was recorded using a bohler fly viscometer in the united states. The time when the viscosity of the epoxy resin composite material is doubled is the operation time of the composite material.
(2) Paint film adhesion test: the adhesion test of the metal surface was carried out according to the method in GB/T9286-1998 "cross-cut test of paint films of coloured paint and varnish", the test grade being rated according to the record in the standard for a classification of 0 to 5, wherein smaller values represent better adhesion.
(3) Impact resistance test of paint film: the impact strength of the paint film was expressed as the maximum height (cm) at which the weight was dropped on the test plate without causing damage to the paint film, as tested by GB/T1732-1993 paint film impact resistance test method.
(4) Hot water resistance test: the paint film prepared from the composition is subjected to a 50 ℃ water immersion resistance test, wherein the test method is a C-C method in GB/T9274-1988 color paint and determination of liquid medium resistance of varnish, and the existence of corrosion phenomena such as bubbling and rust of the paint film is observed;
(5) Salt spray resistance test: the paint film prepared from the composition is subjected to a neutral salt spray resistance test, and the test method is GB/T1771-1991 determination of neutral salt spray resistance of paint and varnish.
[ preparation example 1 ]
3-aminopropyl triethoxysilane (1 mol,221 g) and paraformaldehyde (1 mol,30 g) were reacted with stirring and heated to 50℃and incubated for 2h, followed by vacuum dehydration to give ketimine terminated hydrolyzable silane A.
N- (. Beta. -aminoethyl) -gamma. -aminopropyl trimethoxysilane (1 mol,222 g) and butyraldehyde (1 mol,72 g) were reacted by heating to 70℃with stirring, and after 2h of incubation, dehydrated in vacuo to give ketimine-terminated hydrolyzable silane B.
3-aminopropyl trimethoxysilane (1 mol, 178 g) and butanone (1 mol,72 g) were reacted with stirring and heated to 70℃and after 2h incubation, dehydrated in vacuo to give ketimine terminated hydrolyzable silane C.
3-aminopropyl methyldimethoxy silane (1 mol,163 g) and methyl isobutyl ketone (1 mol,100 g) were reacted with stirring and heated to 70℃and, after 2h incubation, dehydrated in vacuo to give ketimine terminated hydrolyzable silane D.
[ preparation example 2 ]
Triethylene tetramine (1 mol,146 g), epoxy resin E51 (0.25 mol,95 g) and butyl glycidyl ether (1.5 mol,201 g) are mixed, heated to 50 ℃ under stirring for reaction, and deionized water is added to adjust the epoxy equivalent to 270 after heat preservation for 2 hours, so that the end-capped primary amine curing agent A is obtained.
593 curing agent (1 mol,217 g) and dimer acid (0.5 mol,280 g) are mixed, heated to 180 ℃ with stirring for reaction, kept warm for 2 hours, cooled to 80 ℃, and deionized water and propylene glycol methyl ether diluent are added to adjust the epoxy equivalent to 270, thus obtaining the end-capped primary amine curing agent B.
Isophorone diamine (1 mol,170 g), hydroxyethyl acrylate (1 mol,116 g) and butyl glycidyl ether (1 mol,134 g) are mixed, heated to 80 ℃ with stirring for reaction, and after 2h of heat preservation, deionized water and a diluent propylene glycol methyl ether are added to adjust the epoxy equivalent to 270, so that the end-capped primary amine curing agent C is obtained.
M-xylylenediamine (1 mol,136 g), butanone (1 mol,72 g) and butyl glycidyl ether (1 mol,134 g) were mixed, heated to 80 ℃ with stirring to react, and after 2 hours of heat preservation, deionized water and ethylene glycol butyl ether as a diluent were added to adjust the epoxy equivalent to 400, thus obtaining a blocked primary amine curing agent D.
[ example 1 ]
60g of epoxy emulsion wantigo 0906, 20g of ketimine terminated hydrolyzable silane A,7.5g of ethylene carbonate and 12.5g of terminated primary amine curing agent A are mixed and stirred uniformly to obtain the aqueous epoxy composition.
[ examples 2 to 8 ]
Different aqueous epoxy compositions were prepared using the raw material compositions and formulations shown in table 2, respectively.
Table 2, aqueous epoxy composition formulations of examples 1-8
Comparative example 1
An aqueous epoxy composition was prepared under substantially the same conditions as in example 1 except that no ethylene carbonate was added.
Comparative example 2
An aqueous epoxy composition was prepared under substantially the same conditions as in example 1 except that the blocked primary amine curing agent A was replaced with diethylenetriamine.
The waterborne epoxy compositions provided in each example and comparative example were subjected to performance test, and the results are shown in table 3:
TABLE 3 Performance test results
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and additions may be made to those skilled in the art without departing from the method of the present invention, which modifications and additions are also to be considered as within the scope of the present invention.

Claims (9)

1. The water-based epoxy resin composition is characterized by comprising the following raw materials in parts by weight:
the aqueous epoxy resin is used in the range of 35 to 80%, preferably 40 to 80%, more preferably 50 to 70%,
ketimine terminated hydrolyzable silane 5-20%, preferably 5-15%, more preferably 5-10%,
the cyclic carbonate is present in an amount of 1 to 20%, preferably 5 to 20%, more preferably 5 to 10%,
the aqueous secondary amine curing agent is 10 to 50%, preferably 10 to 40%, more preferably 20 to 40%.
2. The aqueous epoxy resin composition according to claim 1, wherein the aqueous epoxy resin is one or more selected from bisphenol a epoxy resin, bisphenol F epoxy resin, novolac epoxy resin, glycidyl ether type epoxy resin, and glycidyl amine type epoxy resin.
3. The aqueous epoxy resin composition of claim 1, wherein the ketimine terminated hydrolyzable silane is the reaction product of a primary amine group containing hydrolyzable silane with an aldehyde/ketone compound;
preferably, the primary amine group-containing hydrolyzable silane is one or more of 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, 3-aminopropyl methyldimethoxysilane, aminopropyl methyldiethoxysilane, N- (β -aminoethyl) - γ -aminopropyl trimethyloxy silane, N-aminoethyl-3-aminopropyl methyldimethoxysilane, diethylenetriaminopropyl trimethoxysilane;
preferably, the aldehyde/ketone compound is one or more of formaldehyde, paraformaldehyde, benzaldehyde, acetaldehyde, valeraldehyde, caprylaldehyde, phenylacetaldehyde, glyoxal, malondialdehyde, glyoxal, acetone, butanone, acetophenone, methyl isobutyl ketone, cyclohexanone.
4. A waterborne epoxy resin composition according to any of claims 1-3, wherein the cyclic carbonate is one or more of ethylene carbonate, propylene carbonate, butylene carbonate, dicyclo carbonate.
5. A waterborne epoxy resin composition according to any of claims 1-3, wherein the waterborne secondary amine curing agent is a blocked primary amine curing agent, preferably the reaction product of a polyamine and an amino-containing reactive group-containing species as blocking agent.
6. The aqueous epoxy resin composition according to claim 5, wherein the polyamine is one or more selected from the group consisting of aliphatic amine, alicyclic amine, aromatic amine, polyether amine and modified products thereof, and the end-capping agent is one or more selected from the group consisting of epoxy group-containing, unsaturated hydrocarbon group, carboxyl group, aldehyde group and ketone group-containing substances.
7. The aqueous epoxy resin composition according to claim 6, wherein one or more of aliphatic amine ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentylene diamine, methylpentanediamine, hexylene diamine, N- (2-ethylamino) -1, 3-propylenediamine, N' -di (3-aminopropyl) -1, 2-ethylenediamine;
preferably, the alicyclic amine is isophorone diamine, 1, 3-cyclohexanediamine, 4' -diaminodicyclohexylmethane, 3' -dimethyl-4, 4' -diaminodicyclohexylmethane, 1-methyl-2, 4-cyclohexanediamine, 1, 2-diaminocyclohexane, N-cyclohexyl-1, 3-propanediamine, cyclohexylamine, N 1 - (3-aminopropyl) -N 3 -one or more of cyclohexyl-1, 3-propanediamine;
preferably, the aromatic amine is one or more of diaminodiphenylmethane, m-xylylenediamine, toluenediamine and diethyltoluenediamine;
preferably, the polyetheramine is one or more of Wanamine8100, wanamine8200, jeffamine D2000, jeffamine T403, jeffamine D220, jeffamine D400, jeffamine T5000;
preferably, the end-capping agent is selected from one or more of epoxy resin, glycidyl ether, glycidyl amine, acrylic ester, formaldehyde, paraformaldehyde, benzaldehyde, acetaldehyde, valeraldehyde, caprylic aldehyde, phenylacetaldehyde, glyoxal, malondialdehyde, glyoxal, acetone, butanone, acetophenone, methyl isobutyl ketone, cyclohexanone.
8. A method for preparing the aqueous epoxy resin composition according to any one of claims 1 to 7, wherein the aqueous epoxy resin composition is obtained by mixing and stirring the components of the aqueous epoxy resin, the ketimine terminated hydrolyzable silane, the cyclic carbonate and the aqueous secondary amine curing agent in a weight ratio.
9. Use of the aqueous epoxy resin composition according to any one of claims 1 to 7 in aqueous paints.
CN202311594916.XA 2023-11-28 2023-11-28 Water-based epoxy resin composition and preparation method and application thereof Pending CN117511344A (en)

Priority Applications (1)

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CN202311594916.XA CN117511344A (en) 2023-11-28 2023-11-28 Water-based epoxy resin composition and preparation method and application thereof

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Application Number Priority Date Filing Date Title
CN202311594916.XA CN117511344A (en) 2023-11-28 2023-11-28 Water-based epoxy resin composition and preparation method and application thereof

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CN117511344A true CN117511344A (en) 2024-02-06

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