CN115368765A - Low-surface-treatment water-based environment-friendly coating and preparation method thereof - Google Patents
Low-surface-treatment water-based environment-friendly coating and preparation method thereof Download PDFInfo
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- CN115368765A CN115368765A CN202210605667.9A CN202210605667A CN115368765A CN 115368765 A CN115368765 A CN 115368765A CN 202210605667 A CN202210605667 A CN 202210605667A CN 115368765 A CN115368765 A CN 115368765A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/324—Alkali metal phosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The invention discloses a preparation method of a low-surface-treatment water-based environment-friendly coating. The advantages are that: (1) Can obviously improve the corrosion resistance of the low-surface treatment water-based environment-friendly coating. (2) The pretreatment requirement is low, and when the rust grade of the surface to be coated is B and a small amount of light oil stains exist on the local surface, a power tool or jet cleaning is not needed. (3) The paint has stable property, no toxicity, no harm, no pollution, no combustion and low VOC content, and meets the requirement of environmental protection (less than or equal to 100 g/L); the corrosion resistance is good, the corrosion resistance period of the boiler product in the processes of storage, transportation and installation can be effectively prolonged, and the defects of paint film cracking, falling and the like do not occur after the atmospheric exposure test for 12 months. And (4) the formula is simple, the material source is rich, and the economy is good.
Description
Technical Field
The invention relates to a paint production process, in particular to a preparation method of a water-based paint.
Background
With the increasing strictness of national requirements on environmental protection, safety and occupational health, the application of water-based coatings has become a necessity. However, a plurality of pipes of a large boiler are anticorrosive, and the traditional oily alkyd paint which is inflammable and explosive and has high VOC emission is mainly used. Therefore, an environment-friendly water-based anticorrosive coating is needed, so that the anticorrosive quality of the product in the processes of manufacturing, transporting, storing and installing is effectively improved, the emission of VOC is reduced, and the environment-friendly requirement is met.
For products with low surface quality, the surface cannot be thoroughly cleaned before coating, foreign substances such as dust, oxides, corrosion products and the like exist on the local surface, even oil stain phenomenon exists, and the existence of the foreign substances on the surface can influence the corrosion prevention service life of the coating. In view of the situation, on the premise of meeting the requirements of product anticorrosion quality, coating anticorrosion life and environmental protection emission, it is very important to develop a water-based alkyd environment-friendly coating suitable for low surface quality.
Disclosure of Invention
The invention provides a low surface treatment water-based environment-friendly coating and a preparation method thereof, aiming at improving the corrosion resistance of the low surface treatment water-based environment-friendly coating.
The technical scheme adopted by the invention is as follows: the preparation method of the composite antirust agent is characterized in that the production raw materials comprise the following components in parts by mass: 30-40 parts of distilled water, 2-5 parts of metal inorganic chelating agent, 1-5 parts of alkynediol surfactant, 1-5 parts of phosphate, 5-10 parts of ethanolamine, 10-30 parts of dicyclohexylamine and 1-3 parts of catalyst.
As a further improvement of the invention, the catalyst is selected from one or two of N, N-dimethylethanolamine monomer and 2-amino-2-methyl-1-propanolamine.
The invention also discloses a composite antirust agent prepared by the preparation method of the composite antirust agent.
The invention also discloses a preparation method of the low-surface-treatment water-based environment-friendly coating, which is characterized in that the production raw materials comprise the composite antirust agent.
The production raw materials of the preparation method of the low-surface-treatment water-based environment-friendly coating can specifically comprise the following components in parts by mass: 10 to 30 parts of acrylic acid modified alkyd water-based resin, 10 to 20 parts of water-based acrylic resin, 20 to 40 parts of pigment, 1 to 3 parts of composite antirust agent, 0.1 to 0.5 part of defoaming agent, 0.1 to 1 part of wetting and leveling agent, 1 to 2 parts of dispersing agent, 0.1 to 1 part of wetting agent, 0.1 to 0.5 part of thickening agent, 0.5 to 2 parts of drier and 8 to 9 parts of pH regulator.
As a further improvement of the invention, the acrylic acid modified alkyd water-based resin is a core-shell acrylic acid modified alkyd water-based resin.
As a further improvement of the present invention, the pigment includes an antirust pigment and an extender pigment; the defoaming agent is a non-silicon polymerized defoaming agent; the dispersant is polyacrylate dispersant; the wetting agent is an alkynol wetting agent; the thickening agent is a polyurethane low shear thickening agent; the pH regulator is an inorganic weak base regulator.
The invention also discloses the low surface treatment water-based environment-friendly coating prepared by the preparation method of the low surface treatment water-based environment-friendly coating.
The invention also discloses an anticorrosion method for the large boiler pipe, which is characterized by comprising the step of coating the surface of the pipe by using the low-surface-treatment aqueous environment-friendly paint.
The invention has the beneficial effects that: (1) The composite antirust agent can obviously improve the corrosion resistance of the low-surface treatment water-based environment-friendly coating. (2) The low-surface-treatment water-based environment-friendly coating has low requirements on pretreatment, and does not need to be cleaned by a power tool or spraying when the corrosion grade of the surface to be coated is B and a small amount of light oil stains are on the local surface. (3) The low-surface-treatment water-based environment-friendly coating has stable property, no toxicity, no harm, no pollution, no combustion and low VOC content, and meets the environment-friendly requirement (less than or equal to 100 g/L); the corrosion resistance is good, the corrosion resistance period of the boiler product in the processes of storage, transportation and installation can be effectively prolonged, and the defects of paint film cracking, falling and the like do not occur after the atmospheric exposure test for 12 months. (4) The low-surface-treatment water-based environment-friendly coating disclosed by the invention is simple in formula, rich in material source and good in economical efficiency.
Drawings
FIG. 1 is a state diagram of the low surface treatment aqueous eco-friendly coating of the present invention.
FIG. 2 is a view showing the state of the surface of the pipe before coating.
Fig. 3 is a surface state diagram of the pipe fitting of the embodiment exposed for 6 months after coating.
Fig. 4 is a view showing the coated pipe of the example in a state of being exposed for 1 year.
FIG. 5 is a view showing the state of the surface of a comparative pipe exposed for 6 months after coating.
Fig. 6 is a view showing the state of the exposed 1-year surface of the pipe of the comparative example after coating.
Detailed Description
The present invention will be further described with reference to the following examples.
The embodiment is as follows:
the water-based environment-friendly coating is prepared according to the following method:
(1) The production raw materials are measured according to the following formula: 40kg of acrylic acid modified alkyd water-based resin, 30kg of water-based acrylic resin, 60kg of pigment (consisting of an antirust pigment and an extender pigment according to a mass ratio of 2:1), 4kg of a composite antirust agent, 0.6kg of a non-silicon polymerization type defoaming agent, 1kg of a wetting and leveling agent, 3kg of a polyacrylate dispersant, 1kg of an alkynol wetting agent, 0.6kg of a polyurethane low-shear thickening agent, 2.4kg of a drier (consisting of cobalt isocyanate, calcium isocyanate and a rare earth salt according to a mass ratio of 0.2; the composite antirust agent comprises the following components in percentage by mass: 40 parts of distilled water, polysilicate and a chelate of monosilicate (the mass ratio of the polysilicate to the monosilicate is 3:7), 4 parts of surfactant (the mass ratio of alkynediol to silicon dioxide is 4:6), 3 parts of phosphate (the mass ratio of zinc phosphate to potassium hydrogen phosphate is 8:2), 9 parts of ethanolamine, 25 parts of dicyclohexylamine and 1 part of catalyst (consisting of N, N-dimethylethanolamine monomer and 2-amino-2-methyl-1-propanolamine according to the mass ratio of 1:1); the preparation method of the composite antirust agent comprises the steps of sequentially adding the raw materials into the mixture with uniform stirring, and uniformly mixing the raw materials to obtain the composite antirust agent, wherein the pH value of the obtained composite antirust agent is 10.3.
(2) Adding deionized water into a stirring cylinder, adding a polyacrylate dispersant, a non-silicon polymeric defoamer, core-shell acrylic modified alkyd resin and pigment under uniform stirring, stirring at a high speed for 20min, transferring into a sand mill for dispersing and grinding for about 60 min to ensure that the fineness of the material is less than 35 mu m, transferring into a paint mixing kettle, adding aqueous acrylic resin, a drier, a composite antirust agent, an alkynol wetting agent and a wetting and leveling agent under uniform stirring, adding an inorganic weak base regulator until the pH is =8.7, and adding an polyurethane low-shear thickening agent to ensure that the viscosity of the product is more than 120 seconds (coating 4 cups), thereby obtaining the low-surface-treatment aqueous environment-friendly paint.
The performance indexes of the obtained water-based environment-friendly coating are detected, and the results are shown in table 1.
Comparative example:
this comparative example is a control experiment of the above example, conducted according to the same procedures, formulations and conditions as the above example, and differs from the example only in that: the raw materials do not contain the composite antirust agent. The specific raw material formula is as follows:
40kg of acrylic acid modified alkyd water-based resin, 30kg of water-based acrylic resin, 60kg of pigment (consisting of an antirust pigment and an extender pigment in a mass ratio of 2:1), 0.6kg of non-silicon polymeric defoaming agent, 1kg of a wetting leveling agent, 3kg of a polyacrylate dispersing agent, 1kg of an alkynol wetting agent, 0.6kg of a polyurethane low shear thickening agent, 2.4kg of a drier (consisting of cobalt isocyanate, calcium isocyanate and a rare earth salt in a mass ratio of 0.2. After the waterborne environment-friendly coating is prepared according to the same steps (without adding the composite antirust agent in the paint mixing kettle) as the above examples, the performance indexes of the coating are detected, and the results are shown in Table 1.
TABLE 1 table of performance index test results of water-based environmental protection coating
Atmosphere exposure experiment:
the aqueous paints prepared in the above examples and comparative examples were applied to boiler tubes for atmospheric exposure tests (coating thickness 60 to 80 μm). And the corrosion conditions of the boiler pipe are recorded before coating, after 6 months of coating and after 1 year of coating, and the results are shown in figures 2-6 and table 2.
TABLE 2 boiler tube corrosion situation recording table (corresponding to fig. 2-6)
| Corrosion of pipe fittings | Examples | Comparative example |
| Before coating | Class B | Class B |
| After 6 months of coating | No obvious corrosion on the surface of the paint film | The surface of the paint film generates blister rust |
| After 1 year of coating | No obvious corrosion on the surface of the paint film | Obvious rust appears on the surface of the paint film |
As can be seen from fig. 2 to fig. 6, tables 1 and 2, the composite antirust agent of the present invention can significantly improve the corrosion resistance of the low surface treatment water-based environment-friendly coating, and probably the reason for this is that the composite antirust agent of the present invention can enhance the complexing and corrosion inhibition effects on the low surface treatment base material.
Claims (9)
1. The preparation method of the composite antirust agent is characterized in that the production raw materials comprise the following components in parts by mass: 30-40 parts of distilled water, 2-5 parts of metal inorganic chelating agent, 1-5 parts of alkynediol surfactant, 1-5 parts of phosphate, 5-10 parts of ethanolamine, 10-30 parts of dicyclohexylamine and 1-3 parts of catalyst.
2. The method for preparing a composite rust inhibitor according to claim 1, characterized in that: the catalyst is selected from one or two of N, N-dimethylethanolamine monomer and 2-amino-2-methyl-1-propanolamine.
3. The composite rust inhibitor obtained by the method for producing a composite rust inhibitor according to claim 1 or 2.
4. The preparation method of the low-surface-treatment water-based environment-friendly coating is characterized by comprising the following steps: the production raw material comprises the composite antirust agent of claim 3.
5. The preparation method of the low surface treatment water-based environment-friendly coating material as claimed in claim 4, wherein the production raw material comprises the following components in parts by mass: 10 to 30 parts of acrylic acid modified alkyd water-based resin, 10 to 20 parts of water-based acrylic resin, 20 to 40 parts of pigment, 1 to 3 parts of composite antirust agent, 0.1 to 0.5 part of defoaming agent, 0.1 to 1 part of wetting and leveling agent, 1 to 2 parts of dispersing agent, 0.1 to 1 part of wetting agent, 0.1 to 0.5 part of thickening agent, 0.5 to 2 parts of drier and 8 to 9 parts of pH regulator.
6. The method for preparing the low surface treatment water-based environment-friendly coating according to claim 5, characterized in that: the acrylic acid modified alkyd water-based resin is core-shell acrylic acid modified alkyd water-based resin.
7. The method for preparing the low surface treatment water-based environment-friendly coating according to claim 5, characterized in that: the pigment comprises an antirust pigment and an extender pigment; the defoaming agent is a non-silicon polymeric defoaming agent; the dispersant is polyacrylate dispersant; the wetting agent is an alkynol wetting agent; the thickening agent is a polyurethane low shear thickening agent; the pH regulator is an inorganic weak base regulator.
8. The low surface treatment aqueous environmental protection coating prepared by the preparation method of the low surface treatment aqueous environmental protection coating according to any one of claims 4 to 7.
9. The large boiler pipe corrosion prevention method is characterized by comprising the following steps: comprising the step of coating the surface of the pipe with the low-surface treatment aqueous environmental protection coating material according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210605667.9A CN115368765A (en) | 2022-05-30 | 2022-05-30 | Low-surface-treatment water-based environment-friendly coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210605667.9A CN115368765A (en) | 2022-05-30 | 2022-05-30 | Low-surface-treatment water-based environment-friendly coating and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106867368A (en) * | 2017-01-13 | 2017-06-20 | 河北晨阳工贸集团有限公司 | A kind of power transmission shaft dip-coating sealing wax and preparation method thereof |
| CN109207034A (en) * | 2018-07-10 | 2019-01-15 | 河北晨阳工贸集团有限公司 | A kind of aqueous rusty anti-corrosion primer and preparation method thereof |
| CN109266132A (en) * | 2018-07-12 | 2019-01-25 | 河北晨阳工贸集团有限公司 | Single-component water-based paint of one kind and preparation method thereof |
| CN114031993A (en) * | 2021-12-15 | 2022-02-11 | 广东省漆色彩新型材料有限公司 | Fireproof and explosion-proof water-based environment-friendly coating for automobile engine compartment |
| CN114196290A (en) * | 2021-12-29 | 2022-03-18 | 重庆南方漆业有限公司 | Industrial water-based paint coating and application method thereof |
-
2022
- 2022-05-30 CN CN202210605667.9A patent/CN115368765A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106867368A (en) * | 2017-01-13 | 2017-06-20 | 河北晨阳工贸集团有限公司 | A kind of power transmission shaft dip-coating sealing wax and preparation method thereof |
| CN109207034A (en) * | 2018-07-10 | 2019-01-15 | 河北晨阳工贸集团有限公司 | A kind of aqueous rusty anti-corrosion primer and preparation method thereof |
| CN109266132A (en) * | 2018-07-12 | 2019-01-25 | 河北晨阳工贸集团有限公司 | Single-component water-based paint of one kind and preparation method thereof |
| CN114031993A (en) * | 2021-12-15 | 2022-02-11 | 广东省漆色彩新型材料有限公司 | Fireproof and explosion-proof water-based environment-friendly coating for automobile engine compartment |
| CN114196290A (en) * | 2021-12-29 | 2022-03-18 | 重庆南方漆业有限公司 | Industrial water-based paint coating and application method thereof |
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