CN109423166A - Aqueous epoxy resins dispersion and coating composition comprising the aqueous epoxy resins dispersion - Google Patents
Aqueous epoxy resins dispersion and coating composition comprising the aqueous epoxy resins dispersion Download PDFInfo
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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
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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
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1438—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing oxygen
- C08G59/1455—Monocarboxylic acids, anhydrides, halides, or low-molecular-weight esters thereof
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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
- C08G59/18—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
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
- C08G59/4207—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof aliphatic
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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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/331—Polymers modified by chemical after-treatment with organic compounds containing oxygen
- C08G65/332—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof
- C08G65/3324—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof cyclic
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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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/331—Polymers modified by chemical after-treatment with organic compounds containing oxygen
- C08G65/332—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof
- C08G65/3324—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof cyclic
- C08G65/3326—Polymers modified by chemical after-treatment with organic compounds containing oxygen containing carboxyl groups, or halides, or esters thereof cyclic aromatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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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
- 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
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
Coating composition the present invention relates to aqueous epoxy resins dispersion and comprising the aqueous epoxy resins dispersion.Since coating composition includes the aqueous epoxy resins dispersion, the coating with excellent impact resistance can be formed.
Description
Technical field
The present invention relates to a kind of aqueous epoxy resins dispersion, it can be used as the coating for being coated with anticorrosion coat or equipment apply
The layer base-material of coating.
Background technique
Epoxy resin is easy to react with amine or acid, to generate firm consolidated structures, especially bisphenol A type epoxy resin
It is applied to various industrial circles due to such as property of chemical-resistant, heat resistance, high intensity and flexibility etc.Industry neck
The example in domain may include paint field, and in paint field, and epoxy resin is used as the main component of base-material.
Simultaneously as recently lasting environmental regulations, the oils resin for paint field is changed to rapidly water-base resin, because
This, has widely carried out about the method in the solvent provided also with aqueous epoxy resin to be scattered in such as water etc
Research.The example of these methods includes introducing using the method for emulsifier dispersion epoxy resin, and by hydrophilic
In epoxy resin and it is dispersed in the method in water.
However, obtaining physical property needed for market by aqueous epoxy resins dispersion obtained by the above method
Coating in terms of there are limitations.Especially aqueous bisphenol A type epoxy resin dispersion significantly reduces the impact resistance of coating,
And it is dfficult to apply to anticorrosion coat coating or equipment coating material.
[existing technical literature]
[patent document]
Korean Patent Laid discloses No.1998-042879
Summary of the invention
Technical solution
One aspect of the present invention provides a kind of aqueous epoxy resins dispersion, can improve the shock resistance of coating
Property.
In addition, it includes aqueous epoxy resins dispersions another aspect provides a kind of coating composition.
The present invention provides a kind of aqueous epoxy resins dispersion containing modified epoxy, the modified epoxy
It is obtained by reacting the reaction product of the pure and mild acid anhydrides of polyether polyols with bisphenol A type epoxy resin.
In addition, it includes aqueous epoxy resins dispersion and amine curing agents the present invention provides a kind of coating composition.
Effect
Since aqueous epoxy resins dispersion of the invention contains such modified epoxy, in the modified epoxy
In introduce with polyether polyol flexible (especially polypropylene glycol), therefore, when the epoxy resin mixes simultaneously with curing agent
As coating composition (particularly, as apply packaging container priming paint) when, can be formed with excellent adhesion, water resistance and
The coating of rust-preventing characteristic and impact resistance.
Specific embodiment
Hereinafter, the present invention is described in detail.
1. aqueous epoxy resins dispersion
Epoxy resin dispersion of the invention includes modified epoxy.
Modified epoxy contained in aqueous epoxy resins dispersion of the invention is by making the pure and mild acid of polyether polyols
Obtained from the reaction product of acid anhydride is reacted with bisphenol A type epoxy resin.
Polyether polyol for obtaining the reaction product can be for selected from by polyethylene glycol, polypropylene glycol, polybutadiene
One or more of the group of pure and mild polytetramethylene glycol composition, especially polypropylene glycol.In addition, polyether polyol can be
Polyether polyol of the weight average molecular weight range in 400 to 10,000 ranges, and the weight average molecular weight that can be used alone is in the model
Enclose interior polyether polyol, or the mixture using two or more polyether polyol with the weight average molecular weight.
For obtain the reaction product acid anhydrides can for selected from by phthalic anhydride, tetrabydrophthalic anhydride,
Methyl tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylhexahydrophthalic anhydride, maleic anhydride, succinic anhydride
With one or more of the group of trimellitic anhydride composition.
The reaction product is that acid anhydrides is opened under the action of polyether polyol during the reaction of the pure and mild acid anhydrides of polyether polyols
Intermediate product obtained from ring.In this case, with molar ratio computing, the reaction ratio of the pure and mild acid anhydrides of polyether polyols can be 1:
1.5 to 1:3.If reaction is than being less than molar ratio 1:1.5, viscosity may be will increase, to reduce the aqueous of resin
(aqueousness), and if molar ratio is greater than 1:3, there may be unreacted acid anhydrides, and are difficult to realize based on polyethers
The performance improvement of polyalcohol.
Furthermore, it is possible to and reacting the mixture of the pure and mild acid anhydrides of polyether polyols 2 to 4 hours at 130 DEG C to 140 DEG C
Obtain reaction product.
Modified epoxy in order to obtain, the bisphenol A type epoxy resin to react with the reaction product can be tool
There is the bisphenol A type epoxy resin of the epoxide equivalent (EEQ) of 190g/mol to 500g/mol.
It can be commercially available by the way that commercially available bisphenol A type epoxy resin is used alone or by mixing two or more
Bisphenol A type epoxy resin, thus to control the epoxide equivalent of bisphenol A type epoxy resin.Furthermore, it is possible to which voluntarily preparing has spy
Epoxide equivalent is determined (for example, epoxide equivalent is the bisphenol A type epoxy resin of 190g/mol to 500g/mol) and then uses.
Particularly, by bisphenol A type epoxy resin that epoxide equivalent is 190g/mol (for example, Kukdo Chemical Co.,
Ltd. the resin of the same levels of YD-128 or other companies) it is injected into flask, and by another epoxy resin (its ring
Oxygen equivalent is different from the bisphenol A type epoxy resin that epoxide equivalent is 190g/mol) with the 0 to 23 of the bisphenol A type epoxy resin
Parts by weight are mixed.In this case, if another epoxy resin of most 23 parts by weight of mixing, epoxide equivalent can
To reach 475g/mol, and the increase of epoxide equivalent may be directly proportional to the combined amount of another epoxy resin.Then, to mixing
Epoxy resin in addition catalysts (for example, ethyltriphenylphosphonium bromide, tetraphenylphosphonibromide bromide, tetraphenylphosphonium chloride
Deng), the additive amount of the catalysts is 0.05 to 0.5 parts by weight of mixed epoxy resin, and temperature is increased to 130 DEG C
To 140 DEG C.Hereafter, reaction is made to carry out 2 to 4 hours to prepare the bisphenol A type epoxy resin with specific epoxide equivalent.
The reaction that can carry out the reaction product and bisphenol A type epoxy resin, until thus obtained modified epoxy tree
The epoxide equivalent of rouge is close to theoretical epoxy equivalent weight.In this case, theoretical epoxy equivalent weight can be to pass through following mathematical formulae 1
Obtained from be worth:
[mathematical formulae 1]
The epoxide equivalent of such theoretical epoxy equivalent weight, i.e., thus obtained modified epoxy can be for 200g/mol extremely
750g/mol.If the epoxide equivalent of modified epoxy deviates the range, due to low viscosity or high viscosity, dispersion may
It cannot be dispersed well, or although dispersion carries out very well, be likely difficult to reach the impact resistance of required degree.
Meanwhile aqueous epoxy resins dispersion of the invention can be further included selected from by emulsifier, dispersing agent, defoaming
One or more of group composed by agent and solvent.
Emulsifier contained in aqueous epoxy resins dispersion of the invention improves the dispersion stability of dispersion.Cream
Nonionic emulsifier, especially ethylene oxide (EO)-propylene oxide (PO)-ethylene oxide (EO) bonding can be used in agent
Block polymer type emulsifier.Wherein, it is contemplated that such block polymer type can be used in the dispersion stability of dispersion
Emulsifier, the weight average molecular weight of oxypropylene (PO) is 1,000 to 4,000 (especially 2,000 to 3,000), and side
Ethylene oxide (EO) weight average molecular weight be 2,000 to 10,000 (4,000 to 8,000).
Total amount based on modified epoxy, the dosage of such emulsifier can be 7 to 15 parts by weight.If emulsifier
Dosage is less than 7 parts by weight, then dispersion may not be able to be dispersed well, and if the dosage is greater than 15 parts by weight, it is resistance to
It is aqueous to may be decreased, and the application field of dispersion may be restricted.
The dispersing agent being further contained in aqueous epoxy resins dispersion of the invention improves the water dispersion of dispersion
Property.As dispersing agent, common ingredient can be used (for example, propylene oxide (PO)-ethylene oxide (EO)-propylene oxide (PO)
Block polymer type or silicon-based type).
Total amount based on modified epoxy, the dosage of such dispersing agent can be 0.01 to 1 parts by weight.If dispersing agent
Dosage less than 0.01 parts by weight, then dispersion may not be able to be dispersed well, if its dosage be greater than 1 parts by weight,
Dispersion stabilization may reduce.
It is further contained in generation and the levelling of the defoaming agent control bubble in aqueous epoxy resins dispersion of the invention
Property.Defoaming agent can be common ingredient (for example, propylene oxide (PO)-ethylene oxide (EO)-propylene oxide (PO) block polymerization
Species type or silicon-based type).
Total amount based on modified epoxy, the dosage of such defoaming agent can be 0.01 to 1 parts by weight.If defoaming agent
Dosage less than 0.01 parts by weight, then dispersion may not be able to be dispersed well, and if its dosage be greater than 1 parts by weight,
It then may cause dispersion and pit or levelability reduction occur.
It is further contained in the viscosity of the solvent control dispersion in aqueous epoxy resins dispersion of the invention.As molten
Common ingredient, especially deionized water, butyl cellosolve, 1- methoxy-2-propanol, the positive fourth of dipropylene glycol-can be used in agent
Base ether, isopropanol, ethylene glycol, Texanol, butyl carbitol, or their mixture can be used.
Total amount based on modified epoxy, the dosage of solvent can be 1 to 20 parts by weight.If the dosage of solvent is less than
1 parts by weight are greater than 20 parts by weight, then are difficult to obtain the dispersion with required viscosity.
This aqueous epoxy resins dispersion of the invention can be prepared by following steps: modified epoxy is prepared,
And the modified epoxy thus prepared is mixed with emulsifier, dispersing agent, defoaming agent and solvent, and disperse water for mixture
In.
Particularly, modified epoxy is injected in reactor, adds emulsifier and solvent thereto, and temperature is increased
To dispersion temperature appropriate.It in this case, can be for when mixed modified epoxy, emulsifier suitable for the temperature of dispersion
Temperature when viscosity with solvent is 10,000cPs to 30,000cPs, and the maximum temperature for being suitable for dispersion can be 95 DEG C.
The 95 DEG C of boiling points of temperature based on the deionized water as decentralized medium.If temperature is more than 95 DEG C, can be by being mixed into another kind
Solvent is to reduce viscosity and suitable for the temperature of dispersion.
Then, the temperature suitable for dispersion is raised the temperature to, and defoaming agent and dispersing agent are uniformly mixed about 30 minutes.?
It after completing mixing, is stirred at high speeds, while being slowly added deionized water and METHOD FOR CONTINUOUS DETERMINATION viscosity dropwise.If measurement
Viscosity reach peak viscosity, then be kept stirring 1 hour and continue to be added dropwise deionized water, and carry out cooling procedure to prepare
Aqueous epoxy resins dispersion.
For the aqueous epoxy resins dispersion of the invention thus prepared, the gross weight based on aqueous epoxy resins dispersion
Amount, solid content can be 50% to 75%, and total epoxide equivalent is 250g/mol to 1,500g/mol, and viscous at 25 DEG C
Degree is 10cPs to 1,000cPs.
The aqueous epoxy resins dispersion of aforementioned present invention contains modified epoxy, which introduces tool
There is the polyether polyol of excellent flexibility, and if coating composition uses the aqueous epoxy resins dispersion as main tree
Rouge, then the impact resistance of the coating formed using the coating composition, which might have, to be obviously improved.
2. coating composition
Coating composition of the invention includes aqueous epoxy resins dispersion and amine curing agent.
Aqueous epoxy resins dispersion contained in coating composition of the invention and above part " 1. aqueous epoxy resins
Content illustrated in dispersion " is identical, therefore will omit its description.
Amine curing agent contained in coating composition of the invention causes the curing reaction of modified epoxy, and can
To use commonly known ingredient.
Since this coating composition of the invention includes aqueous epoxy resins dispersion, can be formed with excellent
Impact resistance and rust-preventing characteristic and adhesion coating.Therefore, coating composition of the invention can be used as anticorrosion coat use
Coating or equipment coating material.
Hereinafter, by reference implementation scheme, the present invention will be described in detail.However, following embodiments is merely to illustrate, and
And the invention is not limited thereto.
The preparation of [embodiment 1] aqueous epoxy resins dispersion
1) preparation of reaction product
The polypropylene glycol and 304g tetrabydrophthalic anhydride that 800g weight average molecular weight is 800 are added into four-neck flask,
And nitrogen tube, H-type separator, blender, thermometer and heater are installed.With 20 DEG C per hour of rate increase temperature and
It is kept for 3 hours at 140 DEG C.Then, cooling reaction product is to obtain the recrystallized reaction product (acid anhydrides intermediate resin) of white.
2) preparation of modified epoxy
13g bisphenol A type epoxy resin 1 (Kukdo Chemical Co., Ltd., YD- are added into four neck round-bottom flasks
128), 67g bisphenol A type epoxy resin 2 (Kukdo Chemical Co., Ltd., YD-011) and 20g reaction product are (by poly- third
The anhydrous acid intermediate resin of glycol open loop), and nitrogen tube, H-type separator, blender, thermometer and heater are installed.With every
The rate of 20 DEG C of hour increases temperature to 130 DEG C.Then, an epoxide equivalent is measured per hour, and when epoxide equivalent reaches
When 630g/mol, reaction is terminated and by reaction product cooling to obtain modified epoxy.
3) preparation of aqueous epoxy resins dispersion
10g emulsifier (Adeka Corporation, F108) and 5g fourth are added into thus obtained modified epoxy
Base cellosolve, and 85 DEG C are raised the temperature to, then stir 30 minutes.After stirring, 0.08g dispersing agent is added respectively
(Adeka Corporation, L-64) and defoaming agent (BYK-024), are then again stirring for 30 minutes.It (can with high speed agitator
Realize 1,000rpm or more) replacement blender, and deionized water is added dropwise with the rate of 1g/min at 900rpm.Then,
22g deionized water is added dropwise, to be 25,000cPs by viscosity control, and under the viscosity, stops being added dropwise and being kept stirring
1 hour.Hereafter, 63g deionized water is added dropwise with the rate of 1g/min, and resulting product is cooled to room temperature to prepare water
Property epoxy resin dispersion.Thus the solid content (NV) of the aqueous epoxy resins dispersion prepared is 55 weight %, and viscosity is
150cPs, and epoxide equivalent is 1,250g/mol.
[comparative example 1]
1) preparation of epoxy resin
Prepare bisphenol A type epoxy resin 2 (Kukdo Chemical Co., Ltd., YD-011).
2) preparation of aqueous epoxy resins dispersion
100g bisphenol A type epoxy resin 2 (Kukdo Chemical Co., Ltd., YD- are added into four neck round-bottom flasks
011), and nitrogen tube, H-type separator, blender, thermometer and heater are installed.Then, 10g emulsifier is added into flask
(Adeka Corporation, F108) and 5g butyl cellosolve then raise the temperature to 85 DEG C and stir 30 minutes.Stirring
After, 0.08g dispersing agent (Adeka Corporation, L-64) and defoaming agent (BYK-024) are added respectively, then again
Stirring 30 minutes.Blender is replaced with high speed agitator (can be achieved 1,000rpm or more), and with 1g/min's at 900rpm
Deionized water is added dropwise in rate.Then, 20g deionized water is added dropwise, thus be 25,000cPs by viscosity control, and
Under the viscosity, stop being added dropwise and being kept stirring 1 hour.Hereafter, 63g deionized water is added dropwise with the rate of 1g/min, and will
Resulting product is cooled to room temperature to prepare aqueous epoxy resins dispersion.Thus the aqueous epoxy resins dispersion prepared is consolidated
Body content (NV) is 55 weight %, viscosity 120cPs, and epoxide equivalent is 950g/mol.
[comparative example 2]
(contain the poly ethyldiol modified type asphalt mixtures modified by epoxy resin reacted by epoxy-hydroxy using the EP387 of Allnex Co.
Rouge) it is used as epoxy resin dispersion, solid content (NV) is 55 weight %, epoxide equivalent 1,000g/mol and viscosity is
2,700cPs。
[comparative example 3]
(contain the poly ethyldiol modified type reacted by epoxy-hydroxy using the AR555 of Air Products Co.
Epoxy resin) it is used as epoxy resin dispersion, solid content (NV) is 55 weight %, and epoxide equivalent is 550g/mol and glues
Degree is 80cPs.
[preparation example 1 and compare preparation example 1 to 3]
By each epoxy resin dispersion and amine curing agent of embodiment 1 and comparative example 1 to 3 (Air Products Co.,
Anquamine 401) it is mixed with the equivalent proportion of 1:0.8, to prepare each coating composition.
By airless spraying by the coating composition thus prepared with 50 μm of thickness be coated in a thickness of 1.6T steel plate
On, and baking hardening 12 hours at 80 DEG C.For completing the steel plate of hardening baking, the physics of coating is evaluated by the following method
Performance, and show the result in the following table 1.
1. rust-preventing characteristic
Corrosion: the state of coating is observed after salt water sprays 1,000 hours.
Creep: crosscutting and after spraying salt water 1,000 hour, measurement starts from the corrosion length of cut portion.
It is bubbled: observing the state of coating after salt water sprays 1,000 hours.
2. adhesion: observing attachment state after salt water sprays 1,000 hours.
3. impact resistance: after applying impact to coating under various conditions, checking the generation in crack.
[table 1]
Referring to table 1, coating is formed by using such coating composition, it can be ensured that being formed has excellent anti-impact
The coating of hitting property and the physical property with comparable or better rust-preventing characteristic and adhesion, uses in the coating composition
Aqueous epoxy resins dispersion of the invention.
Claims (9)
1. a kind of aqueous epoxy resins dispersion, it includes modified epoxy, the modified epoxy is by making polyethers
Obtained from the reaction product of polyalcohol and acid anhydrides is reacted with bisphenol A type epoxy resin.
2. aqueous epoxy resins dispersion according to claim 1, wherein the polyether polyol is selected from by poly- second two
One or more of alcohol, polypropylene glycol, polytetramethylene glycol and group of polytetramethylene glycol composition.
3. aqueous epoxy resins dispersion according to claim 1, wherein the acid anhydrides is selected from by phthalic anhydride, four
Hydrogen phthalic anhydride, methyl tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylhexahydrophthalic anhydride, horse
Come one or more of acid anhydrides, succinic anhydride and group of trimellitic anhydride composition.
4. aqueous epoxy resins dispersion according to claim 1, wherein with molar ratio computing, the pure and mild institute of polyether polyols
The reaction for stating acid anhydrides is compared for 1:1.5 to 1:3.
5. aqueous epoxy resins dispersion according to claim 1, wherein the epoxide equivalent of the bisphenol A type epoxy resin
It (EEQ) is 190g/mol to 500g/mol.
6. aqueous epoxy resins dispersion according to claim 1, wherein the epoxide equivalent of the modified epoxy
It (EEQ) is 200g/mol to 750g/mol.
7. aqueous epoxy resins dispersion according to claim 1 further includes and is selected from by emulsifier, dispersing agent, disappears
One or more of the group of infusion and solvent composition.
8. aqueous epoxy resins dispersion according to claim 7, the gross weight based on the aqueous epoxy resins dispersion
Amount, the solid content of the aqueous epoxy resins dispersion are 50% to 75%, total epoxide equivalent (EEQ) be 250g/mol extremely
1,500g/mol, and the viscosity at 25 DEG C is 10cPs to 1,000cPs.
9. a kind of coating composition, includes:
Aqueous epoxy resins dispersion according to any one of claim 1 to 8；And amine curing agent.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113416296A (en) * | 2020-03-06 | 2021-09-21 | Ｋｃｃ公司 | Water-soluble epoxy resin, preparation method thereof and water-based primer composition containing same |
| CN113416296B (en) * | 2020-03-06 | 2023-09-22 | Ｋｃｃ公司 | Water-soluble epoxy resin, preparation method thereof and water-based primer composition containing water-soluble epoxy resin |
| CN113930147A (en) * | 2021-11-12 | 2022-01-14 | 上海三棵树防水技术有限公司 | Silane modified aliphatic epoxy resin waterproof coating and preparation method thereof |
| WO2023126312A1 (en) * | 2021-12-28 | 2023-07-06 | Basf Coatings Gmbh | Dispersant |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20190025449A (en) | 2019-03-11 |
| KR102044524B1 (en) | 2019-11-14 |
| CN109423166B (en) | 2021-07-23 |
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