CN107987569B - Preparation method of environment-friendly flexible primer with good binding force - Google Patents
Preparation method of environment-friendly flexible primer with good binding force Download PDFInfo
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- CN107987569B CN107987569B CN201711356114.XA CN201711356114A CN107987569B CN 107987569 B CN107987569 B CN 107987569B CN 201711356114 A CN201711356114 A CN 201711356114A CN 107987569 B CN107987569 B CN 107987569B
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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
- C09D5/002—Priming 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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Abstract
The invention relates to the technical field of building materials, and aims to provide a preparation method of an environment-friendly flexible primer with good binding force. The method comprises the following steps: weighing the following components in percentage by mass: 40-52% of nano zinc powder; 5-8% of micron aluminum oxide; 25 to 10 percent of nano silicon dioxide; 5-8% of a defoaming agent; 25 to 22 percent of film forming additive; wherein the nano zinc powder, the micron aluminum oxide and the nano silicon dioxide are more than or equal to 70 percent, and the defoaming agent and the film-forming additive are less than or equal to 30 percent; and (3) placing the components in a ball milling tank for ball milling and mixing, and taking out after the components are uniformly mixed and react to form an emulsified state, thereby obtaining the flexible primer product. The flexible primer disclosed by the invention can improve the interface binding force and the anti-cracking performance between the paint film layer and the substrate layer, and has good binding force. Nano particles are used as modification components, and the self-wetting combination capability between a paint film and a substrate layer is fully improved by utilizing the nano permeation effect theory; the cold spraying technology is adopted to realize the uniform distribution of the flexible primer film on the surface of the matrix, and a paint film structure with excellent comprehensive mechanical properties is obtained.
Description
Technical Field
The invention relates to the field of building wall coatings, in particular to a preparation method of an environment-friendly flexible primer with good binding force.
Background
The long-term exposure to sunlight is one of the major external causes of pollution and erosion of building exterior walls. The harmful rays, high temperature under direct sunlight and temperature difference in four seasons cause aging, loss of luster and easy pollution of building surface materials. This can lead to discoloration and peeling of the exterior wall coating. With the continuous advance of industrial modernization process, the atmosphere pollution is also aggravated by the modern industry. Especially the over-standard discharge of automobile exhaust and industrial waste gas, so that carbon dioxide and sulfur dioxide in the air are increased, and strong local erosion is caused on the outer wall of a building. Therefore, the original exterior wall coating is easy to separate from the matrix, and the erosion degree of the exterior wall of the building is further aggravated. The priming paint for building wall is a coating layer for connecting a matrix layer and a functional paint layer. The traditional primer is often stripped in the service process, and the binding force is weakened; meanwhile, cracking, wrinkling and other phenomena can be observed on the surface of the primer layer, and further the comprehensive performance of the whole coating is seriously influenced.
Based on the nano-penetration effect, the invention provides an environment-friendly flexible primer formula system for improving the interface bonding capability of a matrix layer by taking nano-particles as filler modification components, and the environment-friendly flexible primer formula system is applied to the surface of a building wall, so that the bonding strength of a paint film and the matrix layer can be greatly improved, and the serious phenomena of cracking, faulting and the like can not be caused.
Disclosure of Invention
The invention aims to solve the technical problems that the interface bonding force between a primer and a substrate layer is weak, and a paint film layer is easy to crack and break in the prior art, and provides a preparation method of an environment-friendly flexible primer with good bonding force.
In order to solve the technical problem, the solution of the invention is as follows:
the preparation method of the environment-friendly flexible primer with good bonding force is provided, and comprises the following steps:
(1) weighing the following components in percentage by mass:
40-52% of nano zinc powder; 5-8% of micron aluminum oxide; 25 to 10 percent of nano silicon dioxide; 5-8% of a defoaming agent; 25 to 22 percent of film forming additive; wherein the nano zinc powder, the micron aluminum oxide and the nano silicon dioxide are more than or equal to 70 percent, and the defoaming agent and the film-forming additive are less than or equal to 30 percent;
(2) and (3) placing the components in a ball milling tank for ball milling and mixing, and taking out after the components are uniformly mixed and react to form an emulsified state to obtain a flexible primer product for later use.
In the invention, in the step (2), the ball milling rotation speed is controlled to be 1000-3000 rmp, and the ball milling time is controlled to be 1-3 h.
In the invention, the particle size of the nano zinc powder is 5-20 nm.
In the invention, the particle size of the micron alumina is 1-10 μm.
In the invention, the particle size of the nano silicon dioxide is 10-50 nm.
In the invention, the film forming auxiliary agent is one of ethylene glycol, propylene glycol or polyvinyl alcohol.
The invention also provides a using method of the flexible primer, which comprises the following steps:
(1) carrying out sand blasting treatment on the surface of the building outer wall template by adopting 45-mesh fine sand to remove stains on the surface;
(2) uniformly coating the flexible primer on the surface of the building outer wall sample plate to be coated by adopting a cold spraying process;
the technological parameters of cold spraying are as follows: the gas type for spraying is N2Gas with a gas pressure of 1-3 MPa, a gas temperature of 50-80 ℃ and a gas flow of 2-5 m3The rotation speed of the powder feeder is 20-50 revolutions per minute, the moving speed of the spray gun is 1-5 mm/s, the spraying distance is 3-7 mm, and the thickness of the film layer is 20-60 mu m.
Compared with the prior art, the invention has the beneficial effects that:
(1) the flexible primer disclosed by the invention can improve the interface binding force and the anti-cracking performance between the paint film layer and the substrate layer, and has good binding force.
(2) Nano particles are used as modification components, and the self-wetting combination capability between a paint film and a substrate layer is fully improved by utilizing the nano permeation effect theory;
(3) the cold spraying technology is adopted to realize the uniform distribution of the flexible primer film on the surface of the matrix, and a paint film structure with excellent comprehensive mechanical properties is obtained.
Detailed Description
The following describes in detail an implementation of the present invention by way of specific embodiments.
Example 1
(1) Preparation of flexible primer
According to the optimization result of the formula, the components are weighed by the electronic balance according to the mass percent, the weighed components are placed in a ball milling tank for ball milling and mixing, the ball milling rotation speed is 1000rmp, the ball milling time is 3 hours, and the components are taken out for standby after being uniformly mixed and reacted to form an emulsified state.
The concrete formula and the mass percentage content are as follows:
wherein the film-forming assistant is ethylene glycol; more than or equal to 70 wt% of nano zinc powder, micron aluminum oxide and nano silicon dioxide; defoaming agent + film-forming assistant is less than or equal to 30 wt.%. The defoaming agent can be a conventional defoaming agent product.
(2) Preparation of Flexible primer films
Firstly, carrying out sand blasting treatment on the surface of a building outer wall sample plate by adopting 45-mesh fine sand to remove stains on the surface;
and then, uniformly coating the prepared flexible primer on the surface of the building external wall template to be coated by adopting a cold spraying process. The cold spraying process parameters are as follows: the gas type for spraying is N2Gas pressure of 1MPa, gas temperature of 50 deg.C, and gas flow of 2m3The rotation speed (powder feeding rate) of the powder feeder is 20 revolutions per minute, the moving speed of the spray gun is 1mm/s, the spraying distance is 3mm, and the thickness of the film layer is 20 mu m. And (3) carrying out cold spraying test under the condition of set process parameters, and correspondingly testing the spraying effect of the paint film, including the appearance, the flexibility, the impact resistance and the adhesive force of the paint film. Wherein the flexibility test is carried out according to GB/T1731-93 paint film flexibility determination method; the impact resistance test refers to GB/T4893.9-92 furniture surface paint film impact resistance test method; the adhesion test is referred to paint adhesion test (GBl 720-79).
Example 2
(1) Preparation of flexible primer
According to the optimization result of the formula, the components are weighed by the electronic balance according to the mass percent, the weighed components are placed in a ball milling tank for ball milling and mixing, the ball milling rotation speed is 3000rmp, the ball milling time is 1h, and the components are taken out for standby after being uniformly mixed and reacted to form an emulsified state.
The concrete formula and the mass percentage content are as follows:
wherein the film forming additive is propylene glycol; more than or equal to 70 wt% of nano zinc powder, micron aluminum oxide and nano silicon dioxide; defoaming agent + film-forming assistant is less than or equal to 30 wt.%. The defoaming agent can be a conventional defoaming agent product.
(2) Preparation of Flexible primer films
Firstly, carrying out sand blasting treatment on the surface of a building outer wall sample plate by adopting 45-mesh fine sand to remove stains on the surface;
and then, uniformly coating the prepared flexible primer on the surface of the building external wall template to be coated by adopting a cold spraying process. The cold spraying process parameters are as follows: the gas type for spraying is N2Gas pressure of 3MPa, gas temperature of 80 ℃ and gas flow of 5m3The rotation speed (powder feeding rate) of the powder feeder is 50 revolutions per minute, the moving speed of the spray gun is 5mm/s, the spraying distance is 7mm, and the thickness of the film layer is 60 mu m. And (3) carrying out cold spraying test under the condition of set process parameters, and correspondingly testing the spraying effect of the paint film, including the appearance, the flexibility, the impact resistance and the adhesive force of the paint film. Wherein the flexibility test is carried out according to GB/T1731-93 paint film flexibility determination method; the impact resistance test refers to GB/T4893.9-92 furniture surface paint film impact resistance test method; the adhesion test is referred to paint adhesion test (GBl 720-79).
Example 3
(1) Preparation of flexible primer
According to the optimization result of the formula, the components are weighed by the electronic balance according to the mass percent, the weighed components are placed in a ball milling tank for ball milling and mixing, the ball milling rotation speed is 2000rmp, the ball milling time is 2 hours, and the components are taken out for standby after being uniformly mixed and reacted to form an emulsified state.
The concrete formula and the mass percentage content are as follows:
wherein the film-forming assistant is polyvinyl alcohol; more than or equal to 70 wt% of nano zinc powder, micron aluminum oxide and nano silicon dioxide; defoaming agent + film-forming assistant is less than or equal to 30 wt.%. The defoaming agent can be a conventional defoaming agent product.
(2) Preparation of Flexible primer films
Firstly, carrying out sand blasting treatment on the surface of a building outer wall sample plate by adopting 45-mesh fine sand to remove stains on the surface;
and then, uniformly coating the prepared flexible primer on the surface of the building external wall template to be coated by adopting a cold spraying process. The cold spraying process parameters are as follows: the gas type for spraying is N2Gas pressure of 2MPa, gas temperature of 60 ℃ and gas flow of 3m3The rotation speed (powder feeding rate) of the powder feeder is 30 revolutions per minute, the moving speed of the spray gun is 2mm/s, the spraying distance is 5mm, and the thickness of the film layer is 40 mu m. And (3) carrying out cold spraying test under the condition of set process parameters, and correspondingly testing the spraying effect of the paint film, including the appearance, the flexibility, the impact resistance and the adhesive force of the paint film. Wherein the flexibility test is carried out according to GB/T1731-93 paint film flexibility determination method; the impact resistance test refers to GB/T4893.9-92 furniture surface paint film impact resistance test method; the adhesion test is referred to paint adhesion test (GBl 720-79).
The results of the paint film effect test for each example are shown in the following table:
TABLE 1 paint film property test results for the examples
In the invention, the flexible primer prepared by taking the nano oxide particles as the modified components adopts a cold spraying technology to obtain a paint film with a flat surface, no crack and no fault. The flexible primer provided by the invention is in a water emulsion type, the surface drying time is less than or equal to 0.5h (25 ℃), the drying time is less than or equal to 5h (25 ℃) (the drying time can change along with the difference of environmental temperature and humidity), the coating is free from obstacles in the application, and the suggested application thickness is less than or equal to 100 mu m. Compared with the commercially available Nuo flexible primer sprayed by the same cold spraying process, the paint film prepared by the invention has excellent performances in flexibility and impact resistance, and can effectively improve the interface bonding effect and physical properties between the paint film and a matrix.
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention.
Claims (5)
1. The preparation method of the environment-friendly flexible primer with good bonding force is characterized by comprising the following steps:
(1) weighing the following components in percentage by mass:
40-52% of nano zinc powder; 5-8% of micron aluminum oxide; 25% -10% of nano silicon dioxide; 5-8% of a defoaming agent; 25% -22% of a film forming additive; wherein the nano zinc powder, the micron aluminum oxide and the nano silicon dioxide are more than or equal to 70 percent, and the defoaming agent and the film-forming additive are less than or equal to 30 percent; the film-forming assistant is one of ethylene glycol, propylene glycol or polyvinyl alcohol;
(2) placing the components in a ball milling tank for ball milling and mixing, and taking out after the components are uniformly mixed and reacted to form an emulsified state to obtain a flexible primer product for later use;
the use method for preparing the obtained flexible primer comprises the following steps:
(1) carrying out sand blasting treatment on the surface of the building outer wall template by adopting 45-mesh fine sand to remove stains on the surface;
(2) uniformly coating the flexible primer on the surface of the building outer wall sample plate to be coated by adopting a cold spraying process;
the technological parameters of cold spraying are as follows: the gas type for spraying is N2Gas with a gas pressure of 1-3 MPa, a gas temperature of 50-80 ℃ and a gas flow of 2-5 m3The rotation speed of the powder feeder is 20-50 revolutions per minute, the moving speed of the spray gun is 1-5 mm/s, the spraying distance is 3-7 mm, and the thickness of the film layer is 20-60 mu m.
2. The preparation method of claim 1, wherein in the step (2), the ball milling rotation speed is controlled to be 1000-3000 rpm, and the ball milling time is controlled to be 1-3 h.
3. The preparation method of claim 1, wherein the particle size of the nano zinc powder is 5-20 nm.
4. The method according to claim 1, wherein the micron alumina has a particle size of 1 to 10 μm.
5. The preparation method according to claim 1, wherein the particle size of the nano silica is 10 to 50 nm.
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| CN201711356114.XA CN107987569B (en) | 2017-12-16 | 2017-12-16 | Preparation method of environment-friendly flexible primer with good binding force |
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| CN201711356114.XA CN107987569B (en) | 2017-12-16 | 2017-12-16 | Preparation method of environment-friendly flexible primer with good binding force |
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| CN107987569A CN107987569A (en) | 2018-05-04 |
| CN107987569B true CN107987569B (en) | 2020-10-23 |
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