CN112210274A - Moisture-curable epoxy resin coating and preparation method thereof - Google Patents
Moisture-curable epoxy resin coating and preparation method thereof Download PDFInfo
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- CN112210274A CN112210274A CN202010986576.5A CN202010986576A CN112210274A CN 112210274 A CN112210274 A CN 112210274A CN 202010986576 A CN202010986576 A CN 202010986576A CN 112210274 A CN112210274 A CN 112210274A
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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
- C08G59/18—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
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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
- 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
Abstract
The application provides a moisture-curable epoxy resin coating, the moisture-curable epoxy resin coating includes first component and second component, wherein, the following component of following part by weight is included to first component: 25-35 parts of hydrogenated epoxy resin; 5-25 parts of pigment; 20-40 parts of a filler; 5-15 parts of a reactive diluent; 1-8 parts of an auxiliary agent; the second component is selected from amine curing agents. In the moisture-curing epoxy resin coating, when the hydrogenated epoxy resin and the amine curing agent interact with each other to generate a cross-linking reaction to generate a film-forming substance, the adhesion performance to a base material is improved, wherein the hydrogenated epoxy resin contains saturated six-membered rings, the fracture defect of double bonds is overcome, good weather resistance is shown, the amine curing agent contains a ketimine group, and the ketone imine group can react with external moisture in the reaction process of the hydrogenated epoxy resin, so that the effect of further curing and epoxy resin film forming is achieved, and the moisture-curing epoxy resin coating is ensured to have excellent weather resistance and corrosion resistance.
Description
Technical Field
The application belongs to the technical field of coatings, and particularly relates to a moisture-curable epoxy resin coating and a preparation method thereof.
Background
Epoxy resin paint is a paint using epoxy resin as a main film forming substance, and has various and various characteristics. Self-drying one-component, two-component and multi-component liquid epoxy coatings are classified in a curing manner; baking-type single-component and double-component liquid epoxy coating; powder epoxy coatings and radiation curable epoxy coatings. Solvent-based epoxy coatings, solventless epoxy coatings and water-based epoxy coatings are classified in the coating state.
The epoxy resin coating has excellent corrosion resistance, strong adhesive force of base materials and outstanding chemical resistance, and is widely applied to the field of industrial corrosion resistance. However, the epoxy resin has a large number of unsaturated double bonds in the molecular structure, and when the epoxy resin meets ultraviolet light, free radicals are easily formed, so that the material is promoted to be subjected to an aging process, the coating is yellowed and pulverized and falls off, and the epoxy resin coating is mainly applied to primer or indoor coating, but when the epoxy resin coating is applied to the surface of wet concrete, steel structures or metal base materials with low rust removal grade, the curing capability of the material is poor, the weather resistance is weak, the corrosion resistance is poor when the epoxy resin coating is coated, and the wide applicability of the epoxy resin coating under outdoor conditions is influenced.
Disclosure of Invention
The application aims to provide a moisture-curable epoxy resin coating and a preparation method thereof, and aims to solve the problem that the curing effect of the epoxy resin coating in the outdoor environment is weak and the use is influenced in the prior art.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the present application provides a moisture-curable epoxy resin coating comprising a first component and a second component, wherein the first component comprises the following components in parts by weight:
the second component is selected from amine curing agents.
In a second aspect, the present application provides a method for preparing a moisture-curable epoxy resin coating, wherein the method for preparing the first component comprises the following steps:
carrying out first mixing treatment on hydrogenated epoxy resin and a reactive diluent to obtain a first mixture;
carrying out second mixing treatment on the first mixture and the pigment to obtain a second mixture;
grinding the second mixture and the filler to obtain a third mixture;
and carrying out third mixing treatment on the third mixture and the auxiliary agent to obtain the first component.
The moisture-curable epoxy resin coating provided by the first aspect of the application comprises a first component and a second component, wherein hydrogenated epoxy resin in the first component is used as a main raw material, and when the hydrogenated epoxy resin and an amine curing agent interact to generate a cross-linking reaction to generate a film-forming substance, the adhesion property to a substrate is improved, wherein, the hydrogenated epoxy resin contains saturated six-membered ring, overcomes the fracture defect of double bond in the cross-linking reaction engineering, shows good weather resistance, the amine curing agent contains ketimine group, can react with external moisture in the reaction process with the hydrogenated epoxy resin so as to achieve the effect of further curing and epoxy resin film forming, ensure that the prepared moisture-curing epoxy resin coating is the moisture-curing epoxy resin coating and can be moisture-cured, so that the coating has excellent weather resistance and corrosion resistance.
According to the preparation method of the moisture-curable epoxy resin coating provided by the second aspect of the application, the components of the first component are mixed and then mixed with the second component in the using process, so that the coating can be used.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (a), b, or c", or "at least one (a), b, and c", may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.
It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass described in the specification of the embodiments of the present application may be a mass unit known in the chemical industry field such as μ g, mg, g, kg, etc.
The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The first aspect of the embodiments of the present application provides a moisture-curable epoxy resin coating, which includes a first component and a second component, wherein the first component includes the following components in parts by weight:
the second component is selected from amine curing agents.
The utility model provides a moisture cure type epoxy coating that this application first aspect provided, this moisture cure type epoxy coating includes first component and second component, hydrogenated epoxy resin is the main raw materials in the first component, when hydrogenated epoxy resin and amine type curing agent interact take place cross-linking reaction and generate film forming substance, the adhesion property to the substrate has been improved, wherein, hydrogenated epoxy resin contains saturated six-membered ring, the fracture defect of double bond has been overcome, show good weatherability, amine type curing agent contains the ketimine group, thereby can react with external moisture in the hydrogenated epoxy resin reaction process and reach the effect of further solidification and epoxy film-forming, the moisture cure type epoxy coating who guarantees to obtain is moisture cure type epoxy coating, can moisture cure, make this coating have excellent weatherability and corrosion protection.
Specifically, the moisture-curable epoxy resin coating comprises a first component and a second component, wherein the first component comprises 25-35 parts of hydrogenated epoxy resin, the hydrogenated epoxy resin contains saturated six-membered rings, and the process of generating a film forming substance through a crosslinking reaction with an amine curing agent in a reaction process can overcome the fracture defect of double bonds and improve the weather resistance of a formed film. In the first component of the moisture-curable epoxy resin coating material in the embodiment of the present invention, the hydrogenated epoxy resin includes 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, and 35 parts.
Preferably, the hydrogenated epoxy resin is selected from hydrogenated bisphenol a epoxy resin, an epoxy group of the hydrogenated bisphenol a epoxy resin is connected to a glycidyl group of a side chain ether bond, the hydrogenated bisphenol a epoxy resin has reaction activity similar to that of bisphenol a epoxy resin, and can be cured with an amine curing agent at room temperature to achieve a good curing effect.
Preferably, the hydrogenated epoxy resin is at least one selected from the group consisting of hydrogenated bisphenol A epoxy resin AL-3040, and hydrogenated bisphenol A epoxy resin XY-518.
More preferably, the epoxy value of the hydrogenated bisphenol A epoxy resin is 0.41 to 0.47.
In some embodiments, the hydrogenated epoxy resin is selected from hydrogenated bisphenol A epoxy resins AL-3040 produced by Nicotiana Orificans chemical Co., Ltd, and the epoxy value of the hydrogenated bisphenol A epoxy resin AL-3040 is 0.41 to 0.44.
In some embodiments, the hydrogenated epoxy resin is selected from the group consisting of hydrogenated bisphenol A epoxy resin XY-518 produced by Anhuizhou new materials, the hydrogenated bisphenol A epoxy resin XY-518 having an epoxy value of 0.42 to 0.47.
Specifically, moisture cure type epoxy coating includes first component and second component, and wherein, first component includes 5 ~ 25 parts of pigment, and the purpose of adding pigment lies in improving the colour of moisture cure type epoxy coating, guarantees that moisture cure type epoxy coating more is favorable to the wide use. The color of the coating is adjusted according to different requirements, and the application universality of the coating is ensured. In the first component of the moisture-curable epoxy resin coating, the pigment includes 5 parts, 10 parts, 15 parts, 20 parts and 25 parts.
Preferably, the pigment is at least one selected from carbon black and titanium white.
Specifically, the moisture-curable epoxy resin coating comprises a first component and a second component, wherein the first component comprises 20-40 parts of filler, and the filler is added, so that the flexibility and the cracking property of a coating film can be improved, the covering capability of the coating film can be improved, and the salt spray resistance, the foaming property and the cracking property of the coating film can be improved. In the first component of the moisture-curable epoxy resin coating material in the embodiment of the present invention, the filler includes 20 parts, 25 parts, 30 parts, 35 parts, and 40 parts.
Preferably, the filler is at least one selected from mica powder, talcum powder, barium sulfate and feldspar powder.
Specifically, the moisture-curable epoxy resin coating comprises a first component and a second component, wherein the first component comprises 5-15 parts of reactive diluent, and the diluent is added to facilitate the reduction of the viscosity of resin liquid, so that the construction period of the coating is properly prolonged, and the effect is improved. In the first component of the moisture-curable epoxy resin coating, the reactive diluent comprises 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts and 15 parts.
Preferably, the reactive diluent is at least one selected from DY-3601 and AGE.
Specifically, the moisture-curable epoxy resin coating comprises a first component and a second component, wherein the first component comprises 1-8 parts of an auxiliary agent, and the auxiliary agent is added to be compounded with other components, so that the performance of the moisture-curable epoxy resin coating can be improved. In the embodiment of the invention, in the first component of the moisture-curable epoxy resin coating, the auxiliary agent comprises 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts and 8 parts.
Preferably, the auxiliary agent is selected from at least one of a dispersing agent, a leveling agent, a defoaming agent, an ultraviolet light absorber and a rheological auxiliary agent.
In some embodiments, the auxiliary agent is selected from dispersants, and the dispersant is added to prevent the components from precipitating, so that the use effect is improved. Preferably, the dispersant is at least one selected from BYK-163 and AFCONA S527.
In some embodiments, the auxiliary agent is selected from leveling agents, and the addition of the leveling agent can improve the effect of the coating in a drying film forming process and ensure that a flat, smooth and uniform coating film is formed. Preferably, the leveling agent is at least one selected from BYK-358N, BYK-333.
In some embodiments, the adjuvant is selected from defoamers, which are added to reduce the generation of foam and improve the performance of the product. Preferably, the defoaming agent is selected from at least one of AFCONA 2045 and BYK 054.
In some embodiments, the adjuvant is selected from ultraviolet light absorbers that are effective in protecting the gloss of the coating from cracking and spotting in the external environment. Preferably, the ultraviolet light absorber is selected from at least one of Huann 326 and Basff 5151.
In some embodiments, the additive is selected from rheological additives, and the addition of the rheological additives can improve the viscosity and thixotropy of the coating and improve the performance of the coating. Preferably, the rheology aid is selected from at least one of polyamide wax humble 229 and organic bentonite.
Specifically, the moisture-curable epoxy resin coating comprises a first component and a second component, wherein the second component comprises an amine curing agent, the amine curing agent contains a ketimine group, and can react with external moisture in the reaction process of hydrogenated epoxy resin to further cure and form a film with the epoxy resin, so that the prepared moisture-curable epoxy resin coating is the moisture-curable epoxy resin coating, can be cured by moisture, and has excellent weather resistance and corrosion resistance.
Preferably, the amine curing agent is at least one selected from a ketimine curing agent and a polyetheramine curing agent. The ketimine curing agent is prepared by condensation reaction of ketones and polyamine, and residual polyamine needs to be sealed by a monoepoxy compound. The ketimine can react reversely after absorbing water to generate polyamine, so that the ketimine can interact with water vapor in the environment in the reaction process to further cure the epoxy resin. The polyether amine curing agent takes polypropylene oxide as a main chain, the curing agent with amino groups connected at two ends is taken as a flexible curing agent, and the flexibility of the coating can be improved by adding the polyether amine curing agent.
More preferably, the ketimine curing agent is at least one selected from the group consisting of ketimine curing agents DA-325 and DA-134; the polyether amine curing agent is selected from a small molecular weight polyether amine curing agent 3232.
Preferably, the mass ratio of the first component to the second component is 10: (1-5). The mass ratio of the first component to the second component is controlled, the effect of the cross-linking reaction of the first component and the second component is further improved, and the excellent performance of the obtained moisture-curing epoxy resin coating is ensured.
In a second aspect of the embodiments of the present application, there is provided a method for preparing a moisture-curable epoxy resin coating, the method for preparing the first component comprising the steps of:
s01, carrying out first mixing treatment on hydrogenated epoxy resin and an active diluent to obtain a first mixture;
s02, carrying out second mixing treatment on the first mixture and the pigment to obtain a second mixture;
s03, grinding the second mixture and the filler to obtain a third mixture;
and S04, carrying out third mixing treatment on the third mixture and the auxiliary agent to obtain a first component.
According to the preparation method of the moisture-curable epoxy resin coating provided by the second aspect of the application, the components of the first component are mixed and then mixed with the second component in the using process, so that the coating can be used.
In the step of subjecting the hydrogenated epoxy resin and the reactive diluent to the first mixing treatment in the step S01, the first mixing treatment is performed on the hydrogenated epoxy resin and the reactive diluent at 800 to 1000rpm for 10 to 15 minutes.
Preferably, when the auxiliary agent comprises a mixture of a dispersing agent, a leveling agent, a defoaming agent, an ultraviolet light absorber and a rheological auxiliary agent, the hydrogenated epoxy resin, the reactive diluent and the dispersing agent are subjected to first mixed material treatment for 10-15 minutes under the condition of 800-1000 rpm.
In the step S02, in the step of subjecting the first mixture and the pigment to the second mixing treatment, the first mixing treatment is performed on the first mixture and the pigment at 800 to 1000rpm for 10 to 15 minutes.
Preferably, when the auxiliary agent comprises a mixture of a dispersing agent, a leveling agent, an antifoaming agent, an ultraviolet absorber and a rheological auxiliary agent, the first mixture, the pigment and the antifoaming agent are subjected to second mixing treatment, and the first mixing treatment is carried out for 10-15 minutes under the condition of 800-1000 rpm.
In the above step S03, the second mixture and the filler are subjected to a grinding process to obtain a third mixture. Preferably, the time of the grinding treatment is selected from 10 to 15 minutes.
It is further preferable that the fineness of the third mixture is controlled to 70 μm or less.
In the step S04, in the step of subjecting the third mixture and the auxiliary agent to the third mixing treatment, the third mixture and the auxiliary agent are continuously subjected to the third mixing treatment for 15 to 20 minutes at 600 to 800 rpm.
Preferably, when the auxiliary agent comprises a mixture of a dispersing agent, a leveling agent, a defoaming agent, an ultraviolet light absorber and a rheological auxiliary agent, and in the step of carrying out third mixing treatment on the third mixture, the leveling agent, the ultraviolet light absorber and the rheological auxiliary agent, the third mixture, the leveling agent, the ultraviolet light absorber and the rheological auxiliary agent are continuously screwed for 15-20 minutes under the condition of 600-800 rpm.
In the using process, the second component is directly provided, and the prepared first component and the second component are mixed for use. The product is simple in preparation process, can be subjected to moisture curing, can be used on the surface of wet concrete, steel structures or metal base materials with lower derusting grades, can be constructed on the surface of wet concrete, steel structures or metal base materials with lower derusting grades, and finally obtains a coating film with good weather resistance and excellent corrosion resistance.
The following description will be given with reference to specific examples.
Example 1
Moisture-curable epoxy resin coating
The moisture-curing epoxy resin coating comprises a first component and a second component, wherein the first component comprises the following components in parts by weight:
the second component is selected from 10 parts of amine curing agent;
wherein the hydrogenated epoxy resin is selected from hydrogenated bisphenol A epoxy resin AL-3040;
the pigment is selected from a mixture of 14.5 parts of titanium dioxide and 0.5 part of carbon black
The filler is selected from a mixture of 22 parts of talcum powder and 12 parts of mica powder;
the reactive diluent is selected from DY-3601;
the auxiliary agent is selected from a mixture of 0.5 part of a flatting agent, 0.5 part of a defoaming agent, 1 part of a dispersing agent, 1 part of a rheological auxiliary agent and 3 parts of an ultraviolet light absorbent, the flatting agent is selected from BYK-358N, the defoaming agent is selected from AFCONA 2045, the dispersing agent is selected from BYK-163, the rheological auxiliary agent is selected from polyamide cerette 229, and the ultraviolet light curing agent is selected from Qingdao Huaen 326;
the amine curing agent is selected from ketimine curing agent DA-325.
Preparation method of moisture-curable epoxy resin coating
The preparation method of the first component of the moisture-curing epoxy resin coating comprises the following steps:
carrying out first mixed material treatment on hydrogenated epoxy resin, reactive diluent and dispersing agent for 10 minutes at the condition of 800rpm to obtain first mixture
Carrying out second mixing treatment on the first mixture, the pigment and the defoaming agent, and carrying out first mixing treatment for 10 minutes under the condition of 800rpm to obtain a second mixture
Grinding the second mixture and the filler to obtain a third mixture;
the third mixture and the auxiliary agent were further mixed with the third mixed material at 600rpm for 15 minutes to obtain a first component.
When in use, the first component and the second component are mixed for use.
When in use, the environment temperature is at-5 ℃ or above, and the surface of the base material is in a wet state. If the paint is coated on a completely dry surface, the drying time of the paint is prolonged, and the paint construction is recommended to adopt a high-pressure airless spraying mode for construction.
Example 2
Moisture-curable epoxy resin coating
The moisture-curing epoxy resin coating comprises a first component and a second component, wherein the first component comprises the following components in parts by weight:
the second component is selected from 12 parts of amine curing agent;
wherein the hydrogenated epoxy resin is selected from hydrogenated bisphenol A epoxy resin AL-3040;
the pigment is selected from a mixture of 14.9 parts of titanium dioxide and 0.1 part of carbon black;
the filler is selected from a mixture of 19 parts of talcum powder and 12 parts of mica powder;
the reactive diluent is selected from DY-3601;
the auxiliary agent is selected from a mixture of 0.5 part of a flatting agent, 0.5 part of a defoaming agent, 1 part of a dispersing agent, 1 part of a rheological auxiliary agent and 3 parts of an ultraviolet light absorbent, the flatting agent is selected from BYK-358N, the defoaming agent is selected from AFCONA 2045, the dispersing agent is selected from BYK-163, the rheological auxiliary agent is selected from polyamide cerette 229, and the ultraviolet light curing agent is selected from Qingdao Huaen 326;
the amine curing agent is selected from ketimine curing agent DA-325.
Preparation method of moisture-curable epoxy resin coating
The preparation method of the first component of the moisture-curing epoxy resin coating comprises the following steps:
carrying out first mixed material treatment on hydrogenated epoxy resin, reactive diluent and dispersing agent for 16 minutes at 900rpm to obtain a first mixture
Carrying out second mixing treatment on the first mixture, the pigment and the defoaming agent, and carrying out first mixing treatment for 16 minutes under the condition of 900rpm to obtain a second mixture
Grinding the second mixture and the filler to obtain a third mixture;
the third mixture and the auxiliary agent were further mixed with the third mixture at 700rpm for 15 minutes to obtain a first component.
When in use, the first component and the second component are mixed for use.
When in use, the environment temperature is at-5 ℃ or above, and the surface of the base material is in a wet state. If the paint is coated on a completely dry surface, the drying time of the paint is prolonged, and the paint construction is recommended to adopt a high-pressure airless spraying mode for construction.
Example 3
Moisture-curable epoxy resin coating
The moisture-curing epoxy resin coating comprises a first component and a second component, wherein the first component comprises the following components in parts by weight:
the second component is selected from 12 parts of amine curing agent;
wherein the hydrogenated epoxy resin is selected from hydrogenated bisphenol A epoxy resin AL-3040;
the pigment is selected from a mixture of 14.9 parts of titanium dioxide and 0.1 part of carbon black;
the filler is selected from a mixture of 15 parts of talcum powder and 12 parts of mica powder;
the reactive diluent is selected from DY-3601;
the auxiliary agent is selected from a mixture of 0.5 part of a flatting agent, 0.5 part of a defoaming agent, 1 part of a dispersing agent, 1 part of a rheological auxiliary agent and 3 parts of an ultraviolet light absorbent, the flatting agent is selected from BYK-358N, the defoaming agent is selected from AFCONA 2045, the dispersing agent is selected from BYK-163, the rheological auxiliary agent is selected from polyamide cerette 229, and the ultraviolet light curing agent is selected from Qingdao Huaen 326;
the amine curing agent is selected from ketimine curing agent DA-325.
Preparation method of moisture-curable epoxy resin coating
The preparation method of the first component of the moisture-curing epoxy resin coating comprises the following steps:
carrying out first mixed material treatment on hydrogenated epoxy resin, reactive diluent and dispersing agent for 13 minutes at the condition of 800rpm to obtain first mixture
Carrying out second mixing treatment on the first mixture, the pigment and the defoaming agent, and carrying out first mixing treatment for 15 minutes under the condition of 800rpm to obtain a second mixture
Grinding the second mixture and the filler to obtain a third mixture;
the third mixture and the auxiliary agent were further mixed with the third mixed material at 800rpm for 20 minutes to obtain a first component.
When in use, the first component and the second component are mixed for use.
When in use, the environment temperature is at-5 ℃ or above, and the surface of the base material is in a wet state. If the paint is coated on a completely dry surface, the drying time of the paint is prolonged, and the paint construction is recommended to adopt a high-pressure airless spraying mode for construction.
Example 4
Moisture-curable epoxy resin coating
The moisture-curing epoxy resin coating comprises a first component and a second component, wherein the first component comprises the following components in parts by weight:
the second component is selected from 15 parts of amine curing agent;
wherein the hydrogenated epoxy resin is selected from hydrogenated bisphenol A epoxy resin AL-3040;
the pigment is selected from a mixture of 14.9 parts of titanium dioxide and 0.1 part of carbon black
The filler is selected from a mixture of 12 parts of talcum powder and 12 parts of mica powder;
the reactive diluent is selected from DY-3601;
the auxiliary agent is selected from a mixture of 0.5 part of a flatting agent, 0.5 part of a defoaming agent, 1 part of a dispersing agent, 1 part of a rheological auxiliary agent and 3 parts of an ultraviolet light absorbent, the flatting agent is selected from BYK-358N, the defoaming agent is selected from AFCONA 2045, the dispersing agent is selected from BYK-163, the rheological auxiliary agent is selected from polyamide cerette 229, and the ultraviolet light curing agent is selected from Qingdao Huaen 326;
the amine curing agent is selected from ketimine curing agent DA-325.
Preparation method of moisture-curable epoxy resin coating
The preparation method of the first component of the moisture-curing epoxy resin coating comprises the following steps:
carrying out first mixed material treatment on hydrogenated epoxy resin, reactive diluent and dispersing agent for 15 minutes at 1000rpm to obtain a first mixture
Carrying out second mixing treatment on the first mixture, the pigment and the defoaming agent, and carrying out first mixing treatment for 15 minutes under the condition of 1000rpm to obtain a second mixture
Grinding the second mixture and the filler to obtain a third mixture;
the third mixture and the auxiliary agent were further mixed with the third mixed material at 800rpm for 20 minutes to obtain a first component.
When in use, the first component and the second component are mixed for use.
When in use, the environment temperature is at-5 ℃ or above, and the surface of the base material is in a wet state. If the paint is coated on a completely dry surface, the drying time of the paint is prolonged, and the paint construction is recommended to adopt a high-pressure airless spraying mode for construction.
And (3) performance testing:
the test method comprises the following steps: the two components of the coating obtained in examples 1-4 were mixed, and a plate was produced by spraying with an airless spray gun, and the plate was naturally dried for 7 days, and then the following comprehensive performance test was carried out.
Salt spray resistance test: the test method was carried out according to GB/T1771-1991.
Drying time of a paint film: detection was carried out according to GB/T1728-1979 (1989).
Artificial weather aging resistance: detection was performed according to the GB/T1865-2009 cycle A.
Hardness: detection was carried out according to GB/T6739-96.
Chemical resistance: detection was performed according to GB/T1733-93.
Adhesion force: detection was performed according to GB/T5210-.
The evaluation results were carried out in accordance with GB/T1766-2008.
And (4) analyzing results:
the two components of the coating obtained in the examples 1-4 are mixed, a plate is manufactured by spraying through an airless spray gun, after the coating is naturally dried for 7 days, a salt spray resistance test, a paint film drying time test, an artificial climate aging resistance test, a hardness test, a chemical resistance test and an adhesion test are carried out, the test results are shown in the following table 1, the solid content of each example is more than 95%, and the appearance, the drying time, the salt spray resistance, the chemical resistance, the adhesion and the like of the coating are not obviously different.
The physical properties, mechanical strength and chemical properties of the examples are slightly different due to the different amounts of resin and extender pigment.
From the experimental results:
with the increase of the ultraviolet curing agent Qingdao Huan 326 and the hydrogenated bisphenol A epoxy resin AL-3040, the artificial weather aging resistance of the coating is increased to a certain extent.
Referring to the 4 examples, the formula parameters of the example 4 are reasonably designed, the resin content is moderate, and the construction performance and other physical/chemical properties are most balanced.
TABLE 1 test results of paint Properties of examples
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. The moisture-curing epoxy resin coating is characterized by comprising a first component and a second component, wherein the first component comprises the following components in parts by weight:
the second component is selected from amine curing agents.
2. The moisture-curable epoxy resin coating according to claim 1, wherein the mass ratio of the first component to the second component is 10: (1-5).
3. The moisture-curable epoxy resin coating according to claim 1, wherein the hydrogenated epoxy resin is at least one selected from the group consisting of hydrogenated bisphenol a epoxy resin AL-3040, hydrogenated bisphenol a epoxy resin XY-518.
4. The moisture-curable epoxy resin coating material according to claim 3, wherein the epoxy value of the hydrogenated bisphenol A epoxy resin is 0.41 to 0.47.
5. The moisture-curable epoxy resin coating material according to any one of claims 1 to 3, wherein the reactive diluent is at least one selected from the group consisting of DY-3601 and AGE.
6. The moisture-curable epoxy resin coating material according to any one of claims 1 to 3, wherein the filler is at least one selected from mica powder, talc, barium sulfate and feldspar powder.
7. The moisture-curable epoxy resin coating material according to any one of claims 1 to 3, wherein the auxiliary agent is at least one selected from the group consisting of a dispersant, a leveling agent, an antifoaming agent, an ultraviolet light absorber, and a rheological auxiliary agent.
8. The moisture-curable epoxy resin coating according to claim 7, wherein the dispersant is at least one selected from BYK-163 and AFCONA S527; and/or the presence of a gas in the gas,
the leveling agent is at least one selected from BYK-358N, BYK-333; and/or the presence of a gas in the gas,
the defoaming agent is selected from at least one of AFCONA 2045 and BYK 054; and/or the presence of a gas in the gas,
the ultraviolet light absorber is selected from at least one of Huann 326 and Basff 5151; and/or the presence of a gas in the gas,
the rheological additive is at least one selected from polyamide wax humble 229 and organic bentonite.
9. The moisture-curable epoxy resin coating material according to any one of claims 1 to 3, wherein the amine-based curing agent is at least one selected from a ketimine curing agent and a polyetheramine curing agent.
10. The method for preparing the moisture-curable epoxy resin coating according to any one of claims 1 to 9, wherein the first component is prepared by a method comprising the steps of:
carrying out first mixing treatment on hydrogenated epoxy resin and a reactive diluent to obtain a first mixture;
carrying out second mixing treatment on the first mixture and the pigment to obtain a second mixture;
grinding the second mixture and the filler to obtain a third mixture;
and carrying out third mixing treatment on the third mixture and the auxiliary agent to obtain the first component.
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Cited By (1)
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| CN115109491A (en) * | 2022-07-13 | 2022-09-27 | 湖南中科智网电力科技有限公司 | Anticorrosive paint for electric power iron tower and preparation method thereof |
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Application publication date: 20210112 |