CN112940615A - Environment-friendly high-weather-resistance silicone-acrylic coating composition and preparation method thereof - Google Patents
Environment-friendly high-weather-resistance silicone-acrylic coating composition and preparation method thereof Download PDFInfo
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- CN112940615A CN112940615A CN202110292085.5A CN202110292085A CN112940615A CN 112940615 A CN112940615 A CN 112940615A CN 202110292085 A CN202110292085 A CN 202110292085A CN 112940615 A CN112940615 A CN 112940615A
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- C09D133/00—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
-
- 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
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the field of high polymer materials, and particularly relates to an environment-friendly high-weather-resistance silicone-acrylate coating composition which comprises the following components in percentage by mass: 10-20% of water-based hydroxypropyl resin; 10-25% of modified hybrid silicone resin; 0.01-0.1% of aluminum acetylacetonate; 1-3% ethanol; 15-25% of water-based color paste; 1-3% of film forming assistant. Compared with the traditional emulsion type silicone-acrylate coating, the composition has better adhesive force and weather resistance and is easier to construct.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to an environment-friendly high-weather-resistance silicone-acrylate coating composition and a production method thereof.
Background
The acrylate resin is a new paint variety developed in the 50 s of the 20 th century. The acrylate coating film has the advantages of light color, good transparency, excellent weather resistance, color retention, mechanical stability, film forming property, hardness, rich raw material sources, relatively low cost and the like; the coating film does not change color at about 230 ℃ or even higher temperature, and is resistant to corrosion and contamination of chemicals such as acid, alkali, salt, grease, detergent and the like. Various properties of the coating can be changed by a series of measures such as changing the types of the comonomer and the crosslinking agent, adjusting the molar mass of the polymer and the like. However, acrylate resins also have some disadvantages, such as sensitivity to temperature, susceptibility to hot and cold brittleness, poor water resistance and moisture permeability, susceptibility to light loss, poor low temperature toughness, and high water permeability. The Si-Si bond energy in the organic silicon resin structure is far greater than the C-C bond energy and the C-O bond energy in the acrylate monomer, so that the organic silicon resin has good heat resistance, ozone resistance, ultraviolet aging resistance and good stability; and because the surface tension is small, water and other pollutants are not easy to adhere to, so the organic silicon resin has good moisture resistance, water resistance and water vapor resistance. In addition, the polysiloxane has large molecular volume and low cohesive energy density, so that the polysiloxane has excellent weather resistance, stain resistance, temperature resistance, high hydrophobicity, good air permeability and the like.
The silicone-acrylate emulsion combining the two is prepared by adding an organic silicon monomer containing unsaturated bonds and an acrylic monomer into a proper auxiliary agent and polymerizing the mixture through a core-shell coating polymerization process. Combines the high temperature resistance, weather resistance, chemical resistance, hydrophobicity, low surface energy and difficult pollution of organosilicon and the high color retention, flexibility and adhesiveness of acrylic resin. Is environment-friendly building emulsion and paint with high weather resistance, high water resistance and pollution resistance.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high weather-resistant silicone-acrylate coating composition which is good in performance and environment-friendly.
The technical problem to be solved by the invention is realized by the following technical scheme:
an environment-friendly high-weather-resistance silicone-acrylate coating composition comprises the following components in percentage by weight:
10-20% of water-based hydroxypropyl resin;
10-25% of modified hybrid silicone resin;
0.01-0.1% of aluminum acetylacetonate;
1-3% ethanol;
15-25% of water-based color paste;
1-3% of film forming assistant.
Further, the water-based color paste is weather-resistant water-based color paste.
Further, the preparation method of the water-based hydroxypropyl resin comprises the following steps:
a. adding acrylic monomers and an initiator into an organic solvent;
b. when the acid value is measured to be 60-90 and the hydroxyl value is measured to be 20-30, DMEA is added to neutralize until the pH value is 7-9, and water is added to dissolve to obtain the final product.
Further, the organic solvent comprises an environment-friendly alcohol ether.
Further, the acrylic monomers include AA, MA, BA, HEA, MMA.
Further, the above initiator includes azobisisobutyronitrile.
Further, the preparation method of the modified hybrid silicone resin comprises the following steps:
a. mixing and stirring 30-50 wt% of silica sol, 5-10 wt% of ethyl orthosilicate and 40-60 wt% of MTES;
b. adjusting the pH value to 4-5, and reacting at 50-70 ℃ for 3-5H;
c. adding ethanol to adjust the solid content to 25-35% of the total weight to obtain the final product.
Further, the environment-friendly high-weather-resistance silicone-acrylate coating composition also comprises the following components in percentage by weight: 1-3% of phosphoric acid, which can corrode the metal surface, improve the surface roughness of the metal base material and enhance the adhesive force;
0.1-0.3% of UV absorbent, wherein the UV absorbent can further improve the weather resistance of the product;
0.05-0.1% of aluminum potassium sulfate;
1-3% of water-based plasticizer, the volume of the coating composition cured on the surface of a substrate is reduced, surface shrinkage often occurs, the appearance of the coating is affected, and a proper amount of aluminum potassium sulfate is added to generate chemical expansion and the water-based plasticizer is matched to increase the plasticity of the coating, so that the internal expansion of the coating can compensate the shrinkage.
A preparation method of an environment-friendly high-weather-resistance silicone-acrylate coating composition comprises the following steps:
after mixing the water-based hydroxypropyl resin and the modified hybrid silicon resin, adding an ethanol solution of aluminum acetylacetonate, a film forming aid and water-based color paste, and uniformly dispersing at a variable speed to obtain the environment-friendly high-weather-resistance silicone-acrylate coating composition.
After the technical scheme is adopted, the invention has the following beneficial effects:
the silicone-acrylate coating disclosed by the invention is prepared by matching modified hybrid silicone resin and acrylic resin, has excellent adhesive force, various mechanical properties and better weather resistance, is friendly to construction environment, can be cured at normal temperature, and is convenient to apply.
Detailed Description
The present invention will be described in detail with reference to examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.
The preparation of the aqueous hydroxypropyl resins of examples 1-3 is as follows:
a. adding 0.5Kg of AA, 0.5Kg of MA, 0.5Kg of BA, 0.5Kg of HEA, 0.5Kg of MMA and 0.05Kg of azobisisobutyronitrile into 2Kg of environment-friendly alcohol ether;
b. when the acid value is measured to be 60-90 and the hydroxyl value is measured to be 20-30, DMEA is added to neutralize until the pH value is 7-9, and water is added to dissolve to obtain the final product.
Example 1
An environment-friendly high-weather-resistance silicone-acrylate coating composition comprises the following components in percentage by weight:
20Kg of aqueous hydroxypropyl resin;
25Kg of modified hybrid silicone;
0.03Kg of aluminum acetylacetonate;
3Kg of ethanol;
0.01Kg of a film-forming aid;
15Kg of weather-resistant water-based color paste, and the balance of water.
The preparation method of the modified hybrid silicone resin comprises the following steps:
a. 3Kg of silica sol, 1Kg of ethyl orthosilicate and 6Kg of MTES are mixed and stirred;
b. adjusting the pH value to 4-5, and reacting at 60 ℃ for 4H;
c. adding ethanol to adjust the solid content to 30 percent of the total weight to obtain the final product.
Example 2
An environment-friendly high-weather-resistance silicone-acrylate coating composition comprises the following components in percentage by weight:
10Kg of aqueous hydroxypropyl resin;
15Kg of modified hybrid silicone;
0.03Kg of aluminum acetylacetonate;
3Kg of ethanol;
0.01Kg of a film-forming aid;
10Kg of weather-resistant water-based color paste,
0.1Kg of phosphoric acid;
0.03Kg of UV absorber;
0.05Kg of aluminum potassium sulfate;
0.1Kg of aqueous plasticizer.
The preparation method of the modified hybrid silicone resin comprises the following steps:
a. 5Kg of silica sol, 1Kg of ethyl orthosilicate and 5Kg of MTES are mixed and stirred;
b. adjusting the pH value to 4-5, and reacting at 60 ℃ for 4H;
c. adding ethanol to adjust the solid content to 30 percent of the total weight to obtain the final product.
Example 3
An environment-friendly high-weather-resistance silicone-acrylate coating composition comprises the following components in percentage by weight:
20Kg of aqueous hydroxypropyl resin;
20Kg of modified hybrid silicone;
0.03Kg of aluminum acetylacetonate;
3Kg of ethanol;
0.01Kg of a film-forming aid;
20Kg of weather-resistant water-based color paste, and the balance of water.
The preparation method of the modified hybrid silicone resin comprises the following steps:
a. 4Kg of silica sol, 0.5Kg of ethyl orthosilicate and 4Kg of MTES are mixed and stirred;
b. adjusting the pH value to 4-5, and reacting at 60 ℃ for 4H;
c. adding ethanol to adjust the solid content to 30 percent of the total weight to obtain the final product.
The preparation of examples 1-3 was as follows:
after mixing the water-based hydroxypropyl resin and the modified hybrid silicon resin, adding an ethanol solution of aluminum acetylacetonate, a film forming aid, a water-based color paste variable speed dispersion aid and the like to obtain the environment-friendly high weather-resistant silicone-acrylate coating composition.
The environment-friendly high-weather-resistant silicone-acrylate coating composition of example 1 is respectively placed on a substrate in a spraying mode or directly sampled and tested according to GB/T5237.5-2008, GB1763-79 and the like, and the test results are as follows:
according to test results, the water-based silicone-acrylate high-weatherability coating disclosed by the invention is excellent in various performances and free of VOC (volatile organic compounds) emission.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.
Claims (9)
1. An environment-friendly high-weather-resistance silicone-acrylate coating composition is characterized by comprising the following components in percentage by weight:
10-20% of water-based hydroxypropyl resin;
10-25% of modified hybrid silicone resin;
0.01-0.1% of aluminum acetylacetonate;
1-3% ethanol;
15-25% of water-based color paste;
1-3% of film forming assistant.
2. The environment-friendly high weather-resistant silicone-acrylate coating composition as claimed in claim 1, wherein the aqueous color paste is a weather-resistant aqueous color paste.
3. The environment-friendly high weather-resistant silicone-acrylate coating composition as claimed in claim 1, wherein the preparation method of the water-based hydroxypropyl resin comprises the following steps:
a. adding acrylic monomers and an initiator into an organic solvent;
b. when the acid value is measured to be 60-90 and the hydroxyl value is measured to be 20-30, DMEA is added to neutralize until the pH value is 7-9, and water is added to dissolve to obtain the final product.
4. The environmentally friendly highly weatherable silicone-acrylate coating composition according to claim 3, wherein the organic solvent comprises an environmentally friendly alcohol ether.
5. The environmentally friendly highly weatherable silicone-acrylic coating composition as claimed in claim 3, wherein said acrylic monomer includes AA, MA, BA, HEA, MMA.
6. The environmentally friendly highly weatherable silicone-acrylic coating composition according to claim 3, wherein said initiator comprises azobisisobutyronitrile.
7. The environment-friendly high weather-resistant silicone-acrylate coating composition as claimed in claim 1, wherein the preparation method of the modified hybrid silicone resin comprises the following steps:
a. mixing and stirring 30-50 wt% of silica sol, 5-10 wt% of ethyl orthosilicate and 40-60 wt% of MTES;
b. adjusting the pH value to 4-5, and reacting at 50-70 ℃ for 3-5H;
c. adding ethanol to adjust the solid content to 25-35% of the total weight to obtain the final product.
8. The environmentally friendly high weather resistant silicone-acrylate coating composition as claimed in claim 1, wherein the environmentally friendly high weather resistant silicone-acrylate coating composition further comprises the following components in percentage by weight:
1-3% phosphoric acid;
0.1-0.3% of a UV absorber;
0.05-0.1% of aluminum potassium sulfate;
1-3% of a water-based plasticizer.
9. The preparation method of the environment-friendly high weather-resistant silicone-acrylate coating composition as claimed in claim 1, characterized by comprising the following steps:
after mixing the water-based hydroxypropyl resin and the modified hybrid silicon resin, adding an ethanol solution of aluminum acetylacetonate, a film forming aid and water-based color paste, and uniformly dispersing at a variable speed to obtain the environment-friendly high-weather-resistance silicone-acrylate coating composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110292085.5A CN112940615A (en) | 2021-03-18 | 2021-03-18 | Environment-friendly high-weather-resistance silicone-acrylic coating composition and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110292085.5A CN112940615A (en) | 2021-03-18 | 2021-03-18 | Environment-friendly high-weather-resistance silicone-acrylic coating composition and preparation method thereof |
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| CN112940615A true CN112940615A (en) | 2021-06-11 |
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| CN202110292085.5A Pending CN112940615A (en) | 2021-03-18 | 2021-03-18 | Environment-friendly high-weather-resistance silicone-acrylic coating composition and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240068A (en) * | 2008-01-15 | 2008-08-13 | 大连交通大学 | Modified silicasol and application thereof in preparing water paint |
| CN107841212A (en) * | 2017-11-17 | 2018-03-27 | 广东华兹卜新材料科技有限公司 | A kind of anti-aging water-borne wood coating |
| CN109796837A (en) * | 2019-01-31 | 2019-05-24 | 广州特种承压设备检测研究院 | Acrylic resin modified water paint and preparation method thereof and product |
-
2021
- 2021-03-18 CN CN202110292085.5A patent/CN112940615A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240068A (en) * | 2008-01-15 | 2008-08-13 | 大连交通大学 | Modified silicasol and application thereof in preparing water paint |
| CN107841212A (en) * | 2017-11-17 | 2018-03-27 | 广东华兹卜新材料科技有限公司 | A kind of anti-aging water-borne wood coating |
| CN109796837A (en) * | 2019-01-31 | 2019-05-24 | 广州特种承压设备检测研究院 | Acrylic resin modified water paint and preparation method thereof and product |
Non-Patent Citations (1)
| Title |
|---|
| 曹坚林: "硅烷在油漆与涂料中的应用", 《有机硅材料》 * |
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Application publication date: 20210611 |
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