CN114426783B - Anti-aging nano water-based ceramic coating and preparation method thereof - Google Patents
Anti-aging nano water-based ceramic coating and preparation method thereof Download PDFInfo
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- CN114426783B CN114426783B CN202111654047.6A CN202111654047A CN114426783B CN 114426783 B CN114426783 B CN 114426783B CN 202111654047 A CN202111654047 A CN 202111654047A CN 114426783 B CN114426783 B CN 114426783B
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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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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- 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
- C09D7/65—Additives macromolecular
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Abstract
The invention provides an anti-aging nano water-based ceramic coating which consists of a component A, a component B and a component C; the component A comprises the following components in parts by weight: 5-30 parts of nano silica sol, 5-25 parts of nano alumina sol, 2-5 parts of organic silicon modified acrylic resin and 1-4 parts of anti-settling agent; the component B comprises: 10-15 parts of siloxane monomer; the component C comprises 1-3 parts of an auxiliary agent; the auxiliary agent consists of polyether glycol and propylene glycol, and the molar ratio of the polyether glycol: propylene glycol =1. The paint provided by the invention has strong adhesion to a base material, good flexibility, capability of forming a smooth coating and excellent ageing resistance.
Description
Technical Field
The invention relates to the field of coatings, in particular to an anti-aging nano water-based ceramic coating and a preparation method thereof.
Background
Ceramic coatings are called ceramic coatings because their cured properties are similar to those of ceramic materials. The nano water-based ceramic paint is widely applied to various industrial fields based on the advantages of excellent comprehensive performance and environmental protection and energy conservation, and can achieve better protection and decoration effects. The organosilicon ceramic coating is a commonly used ceramic coating at present, and the formed coating has the advantages of high hardness, good weather resistance, safety, no toxicity and the like. However, the conventional silicone ceramic coating shrinks due to solvent evaporation during curing and use, which causes a cracking phenomenon on the coating surface. Secondly, the adhesive force of the coating to the surface of a base material is small, the coating is easy to fall off, and the coating is also easy to corrode by the environment to generate an aging phenomenon and the like in the long-term use process.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a nano water-based ceramic coating which has strong adhesion to a base material, good flexibility, capability of forming a smooth coating and excellent aging resistance.
According to the first aspect of the invention, the anti-aging nano water-based ceramic coating is provided, and consists of a component A, a component B and a component C; the component A comprises the following components in parts by weight: 5-30 parts of nano silica sol, 5-25 parts of nano alumina sol, 2-5 parts of organic silicon modified acrylic resin and 1-4 parts of anti-settling agent;
the component B comprises: 10-15 parts of siloxane monomer;
the component C comprises 1-3 parts of an auxiliary agent;
the auxiliary agent consists of polyether glycol and propylene glycol, and the molar ratio of the polyether glycol: propylene glycol =1.
Preferably, the weight ratio of the nano silica sol to the nano alumina sol is: siloxane monomer =1.5 to 2.5.
Preferably, the nano silica sol and the nano alumina sol have a particle size of 5 to 30nm.
Preferably, the siloxane monomer is selected from at least one of methyltrimethoxysilane, propyltrimethoxysilane, and phenyltrimethoxysilane.
Preferably, the polyether glycol has a molecular weight of 400 to 1000.
Preferably, the anti-settling agent is inorganic bentonite.
Preferably, the silicone-modified acrylic resin contains hydroxyl groups.
Preferably, the organosilicon modified acrylic resin is selected from at least one of organosilicon modified hydroxyethyl acrylate and organosilicon modified hydroxyethyl methacrylate.
Preferably, the anti-aging nano water-based ceramic coating also comprises 5 to 15 parts of pigment; the pigment is an inorganic pigment.
Preferably, the anti-aging nano water-based ceramic coating also comprises 0.5-5 parts of a catalyst, and the catalyst is an acidic substance.
Preferably, the catalyst is at least one of an acid or an acid salt.
According to another aspect of the invention, the preparation method of the anti-aging nano water-based ceramic coating specifically comprises the following steps:
the method comprises the following steps: uniformly mixing nano silicon dioxide, nano alumina sol, organic silicon modified acrylic resin and an anti-settling agent;
step two: adding an acidic substance, and adjusting the pH value;
step three: siloxane monomer and assistant are added to react for 7 to 8 hours under the condition of stirring at a temperature of between 25 and 30 ℃, and the anti-aging nano water-based ceramic coating is obtained.
Preferably, in step two, the pH is adjusted to 3 to 4.
Compared with the prior art, the invention has the following advantages:
according to the invention, the organosilicon modified acrylic resin with the flexible chain segment is introduced into the anti-aging nano water-based ceramic coating to form a coating with a flexible structure, so that the flexibility of the nano ceramic coating is improved, the nano ceramic coating can be more widely applied to different substrate surfaces after being cured, and the generation of coating cracks is avoided.
On the other hand, the additive is added into the coating, the additive is composed of polyether glycol and propylene glycol in a certain proportion, so that the adhesion between the coating and a base material is increased to a certain extent, and the hydrolysis products of the polyether glycol and the organosiloxane, namely the organosiloxane, can be crosslinked on the polysiloxane, so that the flexibility and the film-forming property of the coating are improved, and the coating is prevented from cracking.
The anti-aging ceramic water-based paint provided by the invention ensures that the coating has higher hardness by adopting the nano silicon dioxide with smaller particle size, and improves the adhesive force, aging resistance, wear resistance, film-forming property and the like of the coating by cooperating with the organic silicon resin and the polyether diol.
Detailed Description
The present invention is described in detail below with reference to specific examples, which will assist those skilled in the art in further understanding the present invention, but are not intended to limit the present invention in any way. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the invention, and all such changes and modifications fall within the scope of the invention.
Example 1
An anti-aging nano water-based ceramic coating comprises a component A: 5 parts of nano silica sol, 5 parts of nano alumina sol, 3 parts of organic silicon modified hydroxyethyl acrylate and 3 parts of sodium bentonite;
10 parts of component B, methyltrimethoxysilane;
and 1 part of an auxiliary agent of the component C, wherein the auxiliary agent consists of polyether glycol (with the average molecular weight of 400) and propylene glycol according to the molar ratio of 1.
The grain diameter of the nano silicon dioxide sol and the nano alumina sol is 5nm;
the preparation method of the anti-aging nano water-based ceramic coating comprises the following steps:
the method comprises the following steps: uniformly mixing 5 parts of nano silica sol, 5 parts of nano alumina sol, 3 parts of organic silicon modified acrylic resin and 5 parts of sodium bentonite in the component A according to the parts by weight;
step two: dropwise adding a catalyst of glacial acetic acid, and adjusting the pH value to 3;
step three: adding 10 parts of methyltrimethoxysilane as the component B and 1 part of assistant as the component C, and reacting for 8 hours under the condition of stirring at 25 ℃ to obtain the anti-aging nano water-based ceramic coating.
Example 2
An anti-aging nano water-based ceramic coating comprises a component A: 25 parts of nano silica sol, 25 parts of nano alumina sol, 5 parts of organic silicon modified hydroxyethyl acrylate and 4 parts of sodium bentonite;
15 parts of component B, namely propyl trimethoxy silane;
and 3 parts of an auxiliary agent of the component C, wherein the auxiliary agent consists of polyether glycol (with the average molecular weight of 1000) and propylene glycol according to a molar ratio of 1.
The grain diameter of the nano silicon dioxide sol and the nano alumina sol is 30nm;
the preparation method of the anti-aging nano water-based ceramic coating comprises the following steps:
the method comprises the following steps: uniformly mixing 25 parts of nano silicon dioxide, 25 parts of nano alumina sol, 5 parts of organic silicon modified acrylic resin and 4 parts of sodium bentonite in the component A in parts by weight;
step two: dropwise adding a catalyst of glacial acetic acid, and adjusting the pH value to 3;
step three: adding 15 parts of propyl trimethoxy silane as the component B and 3 parts of assistant as the component C, and reacting for 8 hours at the temperature of 25 ℃ under stirring to obtain the anti-aging nano water-based ceramic coating.
Example 3
An anti-aging nano water-based ceramic coating comprises a component A: 20 parts of nano silica sol, 15 parts of nano alumina sol, 3 parts of organic silicon modified hydroxyethyl acrylate and 3 parts of sodium bentonite;
12 parts of component B propyl trimethoxy silane;
and the component C comprises 2 parts of an auxiliary agent, wherein the auxiliary agent consists of polyether glycol (with the average molecular weight of 600) and propylene glycol according to the molar ratio of 1.
The particle size of the nano silicon dioxide sol and the nano alumina sol is 20nm;
the preparation method of the anti-aging nano water-based ceramic coating comprises the following steps:
the method comprises the following steps: uniformly mixing 20 parts of nano silicon dioxide, 15 parts of nano alumina sol, 3 parts of organic silicon modified acrylic resin and 3 parts of sodium bentonite in the component A in parts by weight;
step two: dropwise adding a catalyst of glacial acetic acid, and adjusting the pH to 3;
step three: adding 12 parts of propyl trimethoxy silane as the component B and 2 parts of assistant as the component C, and reacting for 8 hours at the temperature of 25 ℃ under stirring to obtain the anti-aging nano water-based ceramic coating.
Comparative example 1
This comparative example differs from example 1 in that no C component is included and no C component is added in the process of coating preparation.
Comparative example 2
This comparative example differs from example 1 in that no polyether diol is included in component C. The formula of the coating comprises the following components in detail: comprises a component A: 5 parts of nano silicon dioxide sol, 5 parts of nano alumina sol, 3 parts of organic silicon modified hydroxyethyl acrylate and 3 parts of sodium bentonite;
10 parts of component B, namely methyltrimethoxysilane;
and 1 part of an auxiliary agent of the component C, wherein the auxiliary agent is propylene glycol.
The grain diameter of the nano silicon dioxide sol and the nano alumina sol is 5nm;
the preparation method of the coating was the same as in example 1.
Comparative example 3
This comparative example differs from example 1 in that propylene glycol is not included in component C. The formula of the coating comprises the following components in detail: comprises a component A: 5 parts of nano silica sol, 5 parts of nano alumina sol, 3 parts of organic silicon modified hydroxyethyl acrylate and 3 parts of sodium bentonite;
10 parts of component B, namely methyltrimethoxysilane;
and 1 part of an auxiliary agent of the component C, wherein the auxiliary agent is polyether glycol (average molecular weight is 400).
The grain diameter of the nano silicon dioxide sol and the nano alumina sol is 5nm;
the preparation method of the coating was the same as in example 1.
Comparative example 4
This comparative example differs from example 1 in that hydroxyethyl acrylate is used instead of silicone-modified hydroxyethyl acrylate. The contents of the components and the preparation method of the coating are the same as in example 1.
Comparative example 5
The comparative example and example 1 are different in that the molecular weight of the polyether glycol is 1500, and the contents of the other components and the preparation method of the coating are the same as those of example 1.
Comparative example 6
The difference between the comparative example and the example 1 is that the particle size of the nano silica sol and the nano alumina sol is 100nm, and the content of the other components and the preparation method of the coating are the same as the example 1.
Preparation of the template
The coating prepared in examples 1 to 3 and comparative examples 1 to 5 was sprayed on a substrate by using compressed air to prepare a coated sample plate, the air pressure was 0.4 to 0.6MPa, the coated substrate was a tin plate, the prepared sample plate was first prevented from being flatly dried at 40 ℃ for 15min, and then placed in an oven to be cured at 120 ℃ for 30min.
Test example 1
The coatings prepared in examples 1 to 3 and comparative examples 1 to 5 were subjected to pencil hardness test
The hardness of the coating is determined according to the method specified in the national standard GB/T6739-2006.
Test example 2
Adhesion test was performed on the coatings prepared in examples 1 to 3 and comparative examples 1 to 5
The adhesion of the coating was tested according to the provisions of the national standard GB/T9286-1998.
Test example 3
Flexibility tests were performed on the coatings prepared in examples 1 to 3 and comparative examples 1 to 5
The flexibility of the coating was tested according to the provisions of the national standard GB/T1731-1993.
Test example 4
The coatings prepared in examples 1 to 3 and comparative examples 1 to 5 were subjected to an anti-aging test
The anti-aging performance of the coating is tested according to the regulations of the national standard GB/T14522-2008.
The results of test example 1 and test example 3 are shown in table 1.
TABLE 1 Performance test results of the coatings
The test results show that the anti-aging water-based nano ceramic coating provided by the invention has excellent comprehensive performance, good adhesive force and flexibility while keeping strong pencil hardness, can form good performance similar to ceramic after being sprayed, plays a role in protecting a base material, has strong adhesive force, and is not easy to fall off after being used for a long time. The paint also has good flexibility, and can form a smooth coating film without generating cracks when being matched with substrates with different surface conditions along with the volatilization of a solvent after spraying. When the polyether glycol and propylene glycol composite additive provided by the invention is not added or only one component is added, the adhesion, pencil hardness and flexibility of the coating are deteriorated to a certain degree. This result indicates that the flexible structure of the polyether diol in the additive gives the coating better flexibility, and when the polyether diol is not contained, the flexibility of the coating is reduced; and when the molecular weight is too large, the chain is longer, the network structure of the network structure formed by polysiloxane can become loose, and the hardness is obviously deteriorated although the flexibility of the coating is better, so the molecular weight of the polyether glycol is very important for maintaining the comprehensive performance of the coating. And the comparative examples 4 to 6 show that the sizes of the particle diameters of the nano silica sol and the nano alumina sol and the addition of the organic silicon modified acrylic resin and other components act synergistically, so that the comprehensive performance of the coating is maintained, and the hardness of the coating is improved.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Variations and modifications to the above-described embodiments may occur to those skilled in the art without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical idea disclosed in the present invention should be covered by the claims of the present invention.
Claims (9)
1. An anti-aging nano water-based ceramic coating is characterized by comprising a component A, a component B and a component C;
the component A comprises the following components in parts by weight: 5-30 parts of nano silica sol, 5-25 parts of nano alumina sol, 2-5 parts of organic silicon modified acrylic resin and 1-4 parts of anti-settling agent;
the component B comprises: 10-15 parts of siloxane monomer;
the component C comprises 1-3 parts of an auxiliary agent;
the auxiliary agent consists of polyether glycol and propylene glycol, and the molar ratio of the polyether glycol: the propylene glycol =1, wherein the molecular weight of the polyether glycol is 400-1000.
2. The anti-aging nano water-based ceramic paint according to claim 1, wherein the nano silica sol and the nano alumina sol are in a weight ratio of: the siloxane monomer =1.5 to 2.5.
3. The anti-aging nano water-based ceramic paint as claimed in claim 2, wherein the nano silica sol and the nano alumina sol have a particle size of 5 to 30nm.
4. The anti-aging nano-water-based ceramic coating according to claim 1, wherein the siloxane monomer is at least one selected from methyltrimethoxysilane, propyltrimethoxysilane and phenyltrimethoxysilane.
5. The anti-aging nano water-based ceramic coating of claim 1, wherein the organosilicon modified acrylic resin is at least one selected from organosilicon modified hydroxyethyl acrylate and organosilicon modified hydroxyethyl methacrylate.
6. The anti-aging nano water-based ceramic paint as claimed in claim 1, further comprising 5 to 15 parts of pigment; the pigment is an inorganic pigment.
7. The anti-aging nano water-based ceramic paint as claimed in claim 1, further comprising 0.5-5 parts of a catalyst, wherein the catalyst is an acidic substance.
8. The preparation method of the anti-aging nano water-based ceramic paint as claimed in any one of claims 1 to 7, which comprises the following steps:
the method comprises the following steps: uniformly mixing the nano-silica sol, the nano-alumina sol, the organic silicon modified acrylic resin and the anti-settling agent;
step two: adding an acidic substance, and adjusting the pH value;
step three: adding siloxane monomer and assistant, and reacting for 7-8 h under the condition of stirring at 25-30 ℃ to obtain the anti-aging nano water-based ceramic coating.
9. The method for preparing the anti-aging nano water-based ceramic paint according to claim 8, wherein in the second step, the pH is controlled within a range of 3 to 4.
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| CN108753023A (en) * | 2018-06-26 | 2018-11-06 | 常州穗时新材料有限公司 | A kind of organosilicon ceramic coating and preparation method |
| CN109796871B (en) * | 2019-01-08 | 2021-03-23 | 中海油常州涂料化工研究院有限公司 | Flexible ceramic coating and preparation method thereof |
| CN111019517B (en) * | 2019-12-26 | 2021-09-10 | 江门市安诺特炊具制造有限公司 | Water-based ceramic coating and preparation method thereof |
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