CN112251113A - Epoxy connecting paint without coating interval limitation and preparation method thereof - Google Patents
Epoxy connecting paint without coating interval limitation and preparation method thereof Download PDFInfo
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- CN112251113A CN112251113A CN202011130688.7A CN202011130688A CN112251113A CN 112251113 A CN112251113 A CN 112251113A CN 202011130688 A CN202011130688 A CN 202011130688A CN 112251113 A CN112251113 A CN 112251113A
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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
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- C09D135/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least another carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Coating compositions based on derivatives of such polymers
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- 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
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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
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K3/22—Oxides; Hydroxides of metals
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- C08K2003/2241—Titanium dioxide
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Abstract
The invention provides an epoxy connecting paint without coating interval limitation and a preparation method thereof, wherein the connecting paint comprises a component A and a component B in a mass ratio of 10: 1-2: 1: the component A comprises 20-40 parts of bisphenol A epoxy resin, 10-30 parts of benzene horse resin, 0.5-3 parts of wetting dispersant, 0.5-2 parts of anti-settling agent, 5-20 parts of titanium dioxide, 5-15 parts of mica powder, 6.5-15 parts of pigment and filler and 10-18 parts of mixed solvent; the component B comprises 30-60 parts of amine curing agent and 40-70 parts of mixed solvent; the mixed solvent comprises alcohols and aromatic compounds. The wettability and recoatability of the coating are greatly improved through the cooperation of the coumarone resin, the bisphenol A epoxy resin and the mixed solvent, the original epoxy coating interval is broken through, the construction without coating interval limitation is realized, the construction cost is greatly reduced, and the construction efficiency is improved; ensuring the adhesion to the coating surface and the interlayer adhesion of the coating.
Description
Technical Field
The invention belongs to the technical field of connecting paints, and particularly relates to an epoxy connecting paint without coating interval limitation and a preparation method thereof.
Background
The connecting paint is used as an intermediate transition coating of antirust paint and intermediate paint or intermediate paint and finish paint to ensure good adhesive force between functional coatings, and is generally applied to the processes of new construction, maintenance and repair of steel structures.
The coating intervals vary from product to product. For a two-component coating, the maximum coating interval of epoxy or acrylic polyurethane paint is generally about three months, the finishing time of a large steel component exceeds the maximum coating interval, most of actual construction time nodes are difficult to meet the coating interval requirement of the coating, and the maximum coating interval time limit is often exceeded. The coating interval time of some coating products has a great influence on the adhesion of the composite coating. If the maximum painting interval is exceeded, the painted surface is smooth and hard. When the subsequent coating is coated, the smooth surface must be polished to form uniform scratches (generally called as 'galling') by using sand paper or a power sand abrasive disc according to the surface state and the performance of the time-out coating and the action, the paint film thickness and the position of the time-out coating in the composite coating, so as to create an easy-to-penetrate adhesion basis for the subsequent coating recoating and ensure the adhesion between two-degree paints. On the other hand, for the component pre-coated with the connecting paint or the intermediate paint, the component cannot be exposed to the atmospheric environment for too long time without protection, otherwise the component will be polluted and corroded by the atmospheric environment, the pre-coating layer is easy to age, the corrosion speed is accelerated, and the service life of the whole matching coating layer and the steel structure is finally shortened. The two aspects of the construction method cause the waste of manpower, material resources and financial resources, and the repeated construction operation can also influence the health and safety of constructors and the ecological environment of the nature.
At present, most of connecting paints on the market are matched with antifouling paints for use, belong to the technical field of antifouling coating connecting materials, and are not used in connecting paints without coating interval limitation of common atmosphere steel structures.
Disclosure of Invention
In view of the above, the present invention is directed to an epoxy connecting paint without coating interval limitation and a preparation method thereof.
The invention provides an epoxy connecting paint without coating interval limitation, which comprises a component A and a component B in a mass ratio of 10: 1-2: 1:
the component A comprises 20-40 parts of bisphenol A epoxy resin, 10-30 parts of benzene horse resin, 0.5-3 parts of wetting dispersant, 0.5-2 parts of anti-settling agent, 5-20 parts of titanium dioxide, 5-15 parts of mica powder, 6.5-15 parts of pigment and filler and 10-18 parts of mixed solvent in parts by weight;
the component B comprises 30-60 parts of amine curing agent and 40-70 parts of mixed solvent;
the mixed solvent comprises alcohols and aromatic compounds.
Preferably, NDJ-1 rotational viscosity of the component A is 2.0-5.0 Pa.S;
the NDJ-1 rotational viscosity meter of the component B is 1.0-5.0 Pa.S.
Preferably, the amine mixed curing agent is selected from one or more of polyamide, phenolic amine and phenolic amide.
Preferably, the molecular weight of the bisphenol A type epoxy resin is 3100-7000 g/mol.
Preferably, the bisphenol a type epoxy resin is one or more selected from 601, 6101, 618 and 828.
Preferably, the resin is selected from one or more of SMA1000, XP5272 and XIRAN.
Preferably, the mixed solvent comprises the following components in a mass ratio of 2-3: 7-8 of a mixture of alcohols and aromatic compounds.
Preferably, the wetting dispersant is selected from modified polyester wetting dispersant and/or polyamide wetting dispersant;
the anti-settling agent is selected from one or more of fumed silica, polyamide wax powder and organic bentonite;
the titanium dioxide is selected from rutile type titanium dioxide and/or anatase type titanium dioxide;
the mica powder is selected from dry mica powder and/or wet mica powder;
the pigment and filler is selected from one or more of talcum powder, silicon micropowder, precipitated barium sulfate, iron oxide red and carbon black.
The invention provides a preparation method of epoxy connecting paint without coating interval limitation, which comprises the following steps:
uniformly dispersing bisphenol A type epoxy resin, benzene horse resin, wetting dispersant, anti-settling agent and part of mixed solvent, then adding titanium dioxide, mica powder and pigment filler, uniformly dispersing, grinding, and adjusting viscosity by using the rest mixed solvent to obtain a component A;
uniformly dispersing the amine curing agent and the mixed solvent to obtain a component B;
and mixing the component A and the component B according to the mass ratio of 10: 1-2: 1 to obtain the epoxy connecting paint without coating interval limitation.
The invention provides an epoxy connecting paint without coating interval limitation, which comprises a component A and a component B in a mass ratio of 10: 1-2: 1: the component A comprises 20-40 parts of bisphenol A epoxy resin, 10-30 parts of benzene horse resin, 0.5-3 parts of wetting dispersant, 0.5-2 parts of anti-settling agent, 5-20 parts of titanium dioxide, 5-15 parts of mica powder, 6.5-15 parts of pigment and filler and 10-18 parts of mixed solvent in parts by weight; the component B comprises 30-60 parts of amine curing agent and 40-70 parts of mixed solvent; the mixed solvent comprises alcohols and aromatic compounds. The wettability and recoatability of the coating are greatly improved through the cooperation of the coumarone resin, the bisphenol A epoxy resin and the mixed solvent, the original epoxy coating interval can be broken through, the construction without coating interval limitation is realized, the construction cost is greatly reduced, and the construction efficiency is improved; ensuring the adhesion to the coating surface and the interlayer adhesion of the coating.
Detailed Description
The invention provides an epoxy connecting paint without coating interval limitation, which comprises a component A and a component B in a mass ratio of 10: 1-2: 1:
the component A comprises 20-40 parts of bisphenol A epoxy resin, 10-30 parts of benzene horse resin, 0.5-3 parts of wetting dispersant, 0.5-2 parts of anti-settling agent, 5-20 parts of titanium dioxide, 5-15 parts of mica powder, 6.5-15 parts of pigment and filler and 10-18 parts of mixed solvent in parts by weight;
the component B comprises 30-60 parts of amine curing agent and 40-70 parts of mixed solvent;
the mixed solvent comprises alcohols and aromatic compounds.
The epoxy connecting paint without coating interval limitation comprises a component A, wherein the component A comprises 20-40 parts of bisphenol A epoxy resin. The bisphenol A type epoxy resin is a high molecular compound prepared by condensing bisphenol A and epoxy chloropropane under an alkaline condition, washing with water, removing a solvent and refining, has an average molecular weight of 3100-7000 g/mol, and has good matching performance on steel substrates and various coatings, so that the adhesive force on the coating surface and the interlayer adhesive force of a coating are ensured, and the recoating performance is very excellent; the bisphenol A epoxy resin has a molecular structure containing aromatic rings, high strength, ether bonds enable molecular chains to easily rotate, the resin has toughness, and due to the aromatic ether bonds, the volume shrinkage is small during coating curing, internal stress is not generated, the adhesive force is good, and alpha-H of the resin is easily subjected to oxidative degradation in sunlight to cause coating oxidation and light loss. In a specific embodiment, the bisphenol a epoxy resin is selected from one or more of 601, 6101, 618 and 828.
The component A comprises 10-30 parts of styrene-maleic resin (SMA). The styrene-maleic anhydride copolymer is styrene-maleic anhydride copolymer, styrene (St) and Maleic Anhydride (MA) are used as monomers, Azodiisobutyronitrile (AIBN) is used as an initiator, chlorohydrocarbon R with a special structure is used as a chain transfer agent, ethyl acetate is used as a solvent, and free radical solution polymerization is adopted to obtain the styrene-maleic anhydride copolymer, the special structure of the anhydride in the SMA resin endows the styrene-maleic anhydride copolymer with stronger derivatization capability and reaction activity, the styrene-maleic anhydride copolymer can be easily subjected to esterification, amidation, imidization, cationization reaction and the like after being mixed with epoxy and amine curing agents, has good amphipathy (oleophylic property and hydrophilic property) and infiltration effect, and shows good stability due to the combined action of a benzene ring and the; after the coating is added, the performances of hydrophilicity, lipophilicity, flexibility, thermal stability and the like of the coating are obviously enhanced. Meanwhile, the resin has wide raw material source and low price, and the cost of the coating is reduced after the resin is added. The styrene-maleic resin has the advantages of good cohesiveness, low price, good miscibility, low melting point, water resistance, ethanol resistance, chemicals resistance and the like, and after being matched with bisphenol A epoxy resin, the coating interval is prolonged indefinitely; greatly reducing the construction cost and improving the construction efficiency. In particular embodiments, the resin is selected from one or more of SMA1000, XP5272, and XIRAN.
The component A comprises 0.5-3 parts of wetting dispersant; the wetting dispersant is selected from modified polyester wetting dispersant and/or polyamide wetting dispersant; the modified polyester wetting and dispersing agent is selected from BYK-210 and/or Efka FA 4610 AN.
The component A comprises 0.5-2 parts of an anti-settling agent; the anti-settling agent is selected from one or more of fumed silica, polyamide wax powder and organic bentonite.
The component A comprises 5-20 parts of titanium dioxide; the titanium dioxide is selected from rutile type and/or anatase type.
The component A comprises 5-15 parts of mica powder; the mica powder is selected from dry mica powder and/or wet mica powder. The mica powder is used as filling powder, so that the connecting paint has good sealing performance, can be used as intermediate connecting layer paint of epoxy anticorrosive connecting paint, various acrylic polyurethane finish paints and other high-performance finish paints, and can also be used as sealing paint of the epoxy anticorrosive connecting paint, the adhesive force of a paint film can be increased, the corrosion resistance and the decorative performance can be improved, the sealing effect of the epoxy anticorrosive connecting paint on a steel surface can be improved, the mica powder is suitable for marine climate and common atmospheric environment, and unnecessary corrosion of the matched epoxy anticorrosive connecting paint, intermediate paint and finish paint during construction intermittence can be prevented.
The component A comprises 6.5-15 parts of pigment and filler; the pigment and filler is selected from one or more of talcum powder, silicon micropowder, precipitated barium sulfate, iron oxide red and carbon black.
The component A comprises 10-18 parts of a mixed solvent; the mixed solvent comprises a mixture of aromatic hydrocarbon and alcohol; the alcohol is selected from ethanol and/or butanol. The cooperation of the bisphenol A type epoxy-benzene maleic resin and the mixed solvent greatly improves the wettability and recoatability of the coating, can break the original coating interval of epoxy, realizes construction without coating interval limitation, greatly reduces the construction cost and improves the construction efficiency; ensuring the adhesion to the coating surface and the interlayer adhesion of the coating.
The NDJ-1 rotational viscosity of the component A is 2.0-5.0 Pa.S, preferably 3.0-4.0 Pa.S.
The epoxy connecting paint without coating interval limitation provided by the invention comprises a component B; the component B comprises 30-60 parts of amine curing agent and 40-70 parts of mixed solvent. The amine curing agent is selected from one or more of polyamide, phenolic amine and phenolic amide.
The mixed solvent in the component B comprises a mixture of aromatic compounds and alcohols; the alcohol is selected from ethanol and/or butanol. In a specific embodiment, the mixed solvent is a mixture of butanol and xylene in a mass ratio of 3: 7.
In the invention, the component A and the component B do not contain high-valence heavy metals, the solid content after mixing is more than 75%, the VOC content is low, and the VOC content after mixing the component A and the component B is not more than 350g/L, thereby being more in line with the concept of environmental protection.
The invention provides a preparation method of epoxy connecting paint without coating interval limitation, which comprises the following steps:
uniformly dispersing bisphenol A type epoxy resin, benzene horse resin, wetting dispersant, anti-settling agent and part of mixed solvent, then adding titanium dioxide, mica powder and pigment filler, uniformly dispersing, grinding, and adjusting viscosity by using the rest mixed solvent to obtain a component A;
uniformly dispersing the amine curing agent and the mixed solvent to obtain a component B;
and mixing the component A and the component B according to the mass ratio of 10: 1-2: 1 to obtain the epoxy connecting paint without coating interval limitation.
In the preparation of the component B, the amine curing agent and the mixed solvent are stirred and dispersed at high speed, the dispersion time is preferably 15-30 min, and the rotation speed is preferably 2000-4000 r/min.
The epoxy connecting paint without coating interval limitation is coated on the surface of a base material, and a coating is formed after crosslinking and curing, so that the epoxy connecting paint without coating interval limitation has double functions of no coating interval limitation and heavy corrosion resistance, and is suitable for all steel structure anticorrosive paint matching systems including marine climate and common atmospheric environment.
The epoxy connecting paint provided by the invention successfully solves the defects of poor adhesion force, need of napping treatment and the like of a coating after exceeding a coating interval in the processes of new construction, maintenance and repair of a steel structure, and can be applied immediately after removing oil stains and dust on the surface of the original coating by coating the next paint at any time, so that the construction cost is reduced, and the construction efficiency is improved.
In order to further illustrate the present invention, the following examples are given to describe the epoxy connecting paint without coating interval limitation and the preparation method thereof in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
The method for preparing the component A comprises the following steps:
the component A is calculated by 100 parts by total mass, 6101 epoxy resin 20 parts, styrene-maleic resin (SMA)30 parts, modified polyester wetting dispersant 3 parts, polyamide wax powder anti-settling agent 0.5 parts, mixed solvent 10 parts (butanol: xylene mass ratio is 3:7) are put into a container in sequence for even dispersion, then anatase titanium dioxide 20 parts, wet mica powder 10 parts, precipitated barium sulfate 4.5 parts, talcum powder 2 parts are added for even dispersion, and the mixture is ground until the fineness is qualified; adjusting the viscosity of the obtained component A mixture to a target range, and filtering to obtain the component A.
The method for preparing the component B comprises the following steps:
and (3) adding 30 parts of polyamide curing agent and 70 parts of mixed solvent into a container to be uniformly dispersed, and filtering to obtain the component B, wherein the total mass part of the component B is 100 parts.
Uniformly mixing the component A and the component B according to the mass ratio of 2:1, and coating the surface of a matrix or the surface of a previous double-component coating to form a film so as to obtain the epoxy connecting paint coating without coating interval limitation.
Example 2:
the method for preparing the component A comprises the following steps:
the component A is taken as 100 parts by total mass, 6101 epoxy resin 20 parts, 618 epoxy resin 10 parts, benzene maleic resin (SMA)20 parts, modified polyester wetting dispersant 1.7 parts, gas phase silicon dioxide anti-settling agent 1.2 parts, mixed solvent 18 parts (butanol: xylene mass ratio is 3:7) are put into a container in sequence to be dispersed evenly, then 13.5 parts of rutile type titanium dioxide, 5 parts of dry method mica powder, 6.6 parts of precipitated barium sulfate and 4 parts of talcum powder are added to be dispersed evenly, and the mixture is ground to be qualified in fineness degree; adjusting the viscosity of the obtained component A mixture to a target range, and filtering to obtain the component A.
The method for preparing the component B comprises the following steps:
and (3) adding 45 parts of phenolic aldehyde amine curing agent and 55 parts of mixed solvent into a container to be uniformly dispersed, and filtering to obtain the component B, wherein the total mass part of the component B is 100 parts.
Uniformly mixing the component A and the component B according to the mass ratio of 5:1, and coating the surface of a matrix or the surface of a previous double-component coating to form a film to obtain the epoxy connecting paint coating without coating interval limitation.
Example 3:
the method for preparing the component A comprises the following steps:
taking 20 parts of 601 epoxy resin, 20 parts of 828 epoxy resin, 10 parts of styrene maleic resin (SMA), 0.5 part of polyamide wetting dispersant, 2 parts of organic bentonite anti-settling agent and 12.5 parts of mixed solvent (the mass ratio of butanol to dimethylbenzene is 3:7) by 100 parts of the component A, sequentially putting into a container, uniformly dispersing, adding 5 parts of rutile titanium dioxide, 15 parts of dry-process mica powder, 11 parts of precipitated barium sulfate and 4 parts of talcum powder, uniformly dispersing, and grinding until the fineness is qualified; adjusting the viscosity of the obtained component A mixture to a target range, and filtering to obtain the component A.
The method for preparing the component B comprises the following steps:
and (3) adding 60 parts of phenolic aldehyde amide curing agent and 40 parts of mixed solvent into a container to be uniformly dispersed, and filtering to obtain the component B, wherein the total mass part of the component B is 100 parts.
Uniformly mixing the component A and the component B according to the mass ratio of 10:1, and coating the surface of a matrix or the surface of a previous double-component coating to form a film to obtain the epoxy connecting paint coating without coating interval limitation.
Comparative example 1:
the preparation method and the ratio of the components are the same as example 1, except that the styrene maleic resin (SMA) is absent.
Comparative example 2:
the preparation method and the proportion of each component are the same as those of the example 2, except that the proportion is changed to 1: 1.
Comparative example 3:
the preparation method and the proportions of the components are the same as those in example 3, except that the curing agent is HDI isocyanate.
The coatings prepared in examples 1 to 3 and comparative examples 1 to 3 were respectively tested, and the results are detailed in table 1.
TABLE 1 Performance test results for coatings prepared from the coatings of examples 1-3 and comparative examples 1-3
Partial index test description:
1 adhesion
1.1 circle drawing method: the test for the tie paints alone was carried out as specified in GB/T9286-1988;
1.2 pulling method: according to the regulations of GB/T5210-2006.
Matching: the ship bottom antirust paint matching system with complete test comprises the following components: the dry film thickness of the sprayed aluminum red epoxy anti-rust primer is 100 mu m +/-10 mu m multiplied by 1, the dry film thickness of the connecting paint to be tested is 70 mu m +/-5 mu m multiplied by 1, the acrylic polyurethane finish paint is 40 mu m +/-5 mu m multiplied by 2, the total dry film thickness of the coating is 250 mu m +/-10 mu m, the coating interval is 24h, the state is adjusted for 7 days after the last coating, and then the test is carried out.
2 resistance to soaking
2.1 sample size and test method: 150mm × 300mm × 3mm, surface roughness Ra of 40 μm-80 μm, and plate preparation and test conditions specified in GB/T10834-.
2.2 the project is the measurement after matching, and the matching system, coating thickness, coating interval and state adjustment are the same as 1.2.
2.3 according to 4.3.2 specified in GB/T6822-2014. The results were evaluated according to GB/T1766-. If the "first 10 cycles (70d) of the soak test did not blister beyond the 1(S2) rating or other surface defect, but the growth rate was slow or insignificant, it was not counted. After 20 soaking periods (140d) are finished, the rusting of the paint film is not more than 1(S2), the blistering is not more than 2(S3), and the change of the appearance color is not more than 1. And (4) after soaking, determining that the adhesion force of the recoated surface antirust paint system is not less than 50% of the adhesion force of the recoated surface.
3 resistance to blistering
3.1 according to GB/T6822-.
3.2 the item is the measurement after matching, and the matching system, the coating thickness, the coating interval and the state are adjusted to be 1.2.
4 resistance to cathodic disbonding
The cathodic disbondment resistance was tested as specified in GB/T7790-2008. After the test, the average distance between the stripped coating and the outer edge of the artificial holiday hole is not more than 8mm, namely the calculated equivalent circle diameter of the stripped coating around the whole artificial holiday hole is 19 mm. After the project is matched, the matching system, the coating thickness, the coating interval and the state are adjusted to be 1.2.
5 salt spray resistance
5.1 according to GB/T1771-2007.
5.2 this project is single antirust paint salt spray resistance test, and the plate manufacturing method is: and (3) spraying the connecting paint to be tested twice, wherein the total dry film thickness is 140 micrometers +/-10 micrometers, the coating interval is 24 hours, the state is adjusted for 7 days after the second spraying, and then testing is carried out.
6 oil resistance
The method is carried out according to the specification of GB/T9274-1988. After the project is matched, the test is carried out, and the matching system, the coating thickness, the coating interval and the state are adjusted to be 1.2.
It is obvious through comparison that the selection of the curing agent and the styrene-maleic anhydride (SMA) plays a very critical role in the performance of the product, particularly the adhesion test after 180 days, and in addition, the performance of the ratio of the resin to the curing agent (or the mass ratio of the component A to the component B) determines the crosslinking density of the coating and the comprehensive performance of the coating.
The embodiment shows that the invention provides the epoxy connecting paint without coating interval limitation, which comprises a component A and a component B in a mass ratio of 10: 1-2: 1: the component A comprises 20-40 parts of bisphenol A epoxy resin, 10-30 parts of benzene horse resin, 0.5-3 parts of wetting dispersant, 0.5-2 parts of anti-settling agent, 5-20 parts of titanium dioxide, 5-15 parts of mica powder, 6.5-15 parts of pigment and filler and 10-18 parts of mixed solvent in parts by weight; the component B comprises 30-60 parts of amine curing agent and 40-70 parts of mixed solvent; the mixed solvent comprises alcohols and aromatic compounds. The wettability and recoatability of the coating are greatly improved through the cooperation of the coumarone resin, the bisphenol A epoxy resin and the mixed solvent, the original epoxy coating interval can be broken through, the construction without coating interval limitation is realized, the construction cost is greatly reduced, and the construction efficiency is improved; ensuring the adhesion to the coating surface and the interlayer adhesion of the coating.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. An epoxy connecting paint without coating interval limitation comprises a component A and a component B in a mass ratio of 10: 1-2: 1:
the component A comprises 20-40 parts of bisphenol A epoxy resin, 10-30 parts of benzene horse resin, 0.5-3 parts of wetting dispersant, 0.5-2 parts of anti-settling agent, 5-20 parts of titanium dioxide, 5-15 parts of mica powder, 6.5-15 parts of pigment and filler and 10-18 parts of mixed solvent in parts by weight;
the component B comprises 30-60 parts of amine curing agent and 40-70 parts of mixed solvent;
the mixed solvent comprises alcohols and aromatic compounds.
2. The epoxy joining paint according to claim 1, wherein the NDJ-1 rotational viscosity of the a component is 2.0 to 5.0 pa.s;
the NDJ-1 rotational viscosity meter of the component B is 1.0-5.0 Pa.S.
3. The epoxy tie paint of claim 1, where the amine hybrid curing agent is selected from one or more of a polyamide, a phenolic amine, and a phenolic amide.
4. The epoxy connecting paint according to claim 1, wherein the bisphenol A type epoxy resin has a molecular weight of 3100 to 7000 g/mol.
5. The epoxy jointing varnish according to claim 1, wherein the bisphenol-a type epoxy resin is one or more selected from 601, 6101, 618 and 828.
6. The epoxy tie coat of claim 1, wherein the benzene horse resin is selected from one or more of SMA1000, XP5272 and XIRAN.
7. The epoxy connecting paint according to claim 1, wherein the mixed solvent comprises the following components in a mass ratio of 2-3: 7-8 of a mixture of alcohols and aromatic compounds.
8. The epoxy joining paint according to claim 1, wherein the wetting dispersant is selected from modified polyester-based wetting dispersants and/or polyamide-based wetting dispersants;
the anti-settling agent is selected from one or more of fumed silica, polyamide wax powder and organic bentonite;
the titanium dioxide is selected from rutile type titanium dioxide and/or anatase type titanium dioxide;
the mica powder is selected from dry mica powder and/or wet mica powder;
the pigment and filler is selected from one or more of talcum powder, silicon micropowder, precipitated barium sulfate, iron oxide red and carbon black.
9. A method for preparing the epoxy jointing paint without coating interval limitation as defined in any one of claims 1 to 8, comprising the steps of:
uniformly dispersing bisphenol A type epoxy resin, benzene horse resin, wetting dispersant, anti-settling agent and part of mixed solvent, then adding titanium dioxide, mica powder and pigment filler, uniformly dispersing, grinding, and adjusting viscosity by using the rest mixed solvent to obtain a component A;
uniformly dispersing the amine curing agent and the mixed solvent to obtain a component B;
and mixing the component A and the component B according to the mass ratio of 10: 1-2: 1 to obtain the epoxy connecting paint without coating interval limitation.
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Cited By (1)
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| CN116574442A (en) * | 2023-05-26 | 2023-08-11 | 共享新材料(山东)有限公司 | Spray coating composition and preparation and use methods thereof |
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