CN111154405A - Preparation method of water-based paint nano composite material - Google Patents
Preparation method of water-based paint nano composite material Download PDFInfo
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- CN111154405A CN111154405A CN201911327846.5A CN201911327846A CN111154405A CN 111154405 A CN111154405 A CN 111154405A CN 201911327846 A CN201911327846 A CN 201911327846A CN 111154405 A CN111154405 A CN 111154405A
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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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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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
- C09D5/18—Fireproof paints including high temperature resistant 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of water-based paint nano composite materials, and discloses a preparation method of a water-based paint nano composite material, which comprises the following steps: the paint comprises a nano water-based compound, a film assistant, water, a thickening agent, a pigment dispersing agent, a defoaming agent, an emulsion, a pigment, a filler and an assistant; s2, mixing materials: the nano water-based compound and water are firstly put into a multi-purpose machine to be stirred at 1200r/min for 20min, and then the rotating speed of the multi-purpose machine is adjusted to 500 r/min. The nano composite material of the water-based paint prepared by the invention has the advantages that the filling particles of the composite material are uniformly dispersed, the nano characteristics of the particles are intact, and the composition of the nano material and the water-based polymer emulsion can obviously improve the mechanical strength, the thermal stability, the water resistance and other properties of a water-based polymer emulsion coating film and completely adapt to the requirements of the performance of water-based paints such as water-based wood paint, water-based metal anticorrosive paint and the like.
Description
Technical Field
The invention relates to the technical field of water-based paint nanocomposite materials, in particular to a preparation method of a water-based paint nanocomposite material.
Background
At present, the polymer emulsion used for the water-based paint mainly comprises emulsions of polyvinyl acetate homopolymer, vinyl acetate and ethylene copolymer (EVA), acrylate polymer (pure propylene), vinyl acetate and acrylate copolymer (ethylene propylene), styrene and acrylate copolymer (styrene-acrylic) and copolymer of butadiene and styrene (butylbenzene).
Wherein, the polyvinyl acetate homopolymer emulsion has soft coating film and good binding force, but has poor water resistance and acid and alkali resistance; the EVA emulsion prepared by introducing the ethylene comonomer into the polyvinyl acetate obviously improves the performance of the polyvinyl acetate due to the introduction of the ethylene chain segment, and obviously improves the water resistance, alkali resistance, weather resistance and dirt resistance of a coating film; the water resistance, alkali resistance, weather resistance, aging resistance and other properties of a coating film of the ethylene-propylene emulsion prepared by introducing the acrylate comonomer into the polyvinyl acetate are also obviously improved; if styrene is used to partially or completely replace methyl methacrylate in the pure acrylic emulsion to prepare the styrene-acrylic emulsion, on one hand, the styrene chain segment is introduced into the copolymer, so that the water resistance, alkali resistance, hardness, dirt resistance and chalking resistance of the coating film can be improved, and on the other hand, the production cost is greatly reduced, so that the styrene-acrylic emulsion is more widely applied to the preparation of water-based paint.
Although the polymer emulsion has the special excellent performance, the coating film has generally low hardness and water resistance, so that the polymer emulsion cannot meet the requirements of the performance of water-based coatings such as water-based wood paint, water-based metal anticorrosive paint and the like.
Disclosure of Invention
Technical problem to be solved
The invention further provides a preparation method of the water-based paint nano composite material, aiming at solving the problem that the coating film of the water-based paint nano composite material has generally low hardness and water resistance and cannot meet the requirements of the performance of water-based paints such as water-based wood paint, water-based metal anticorrosive paint and the like.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that: a preparation method of a water-based paint nano composite material comprises the following steps:
s1, material preparation: the paint comprises a nano water-based compound, a film assistant, water, a thickening agent, a pigment dispersing agent, a defoaming agent, an emulsion, a pigment, a filler and an assistant;
s2, mixing materials: firstly, putting the nano water-based compound and water into a multi-purpose machine, stirring at 1200r/min for 20min, then adjusting the rotating speed of the multi-purpose machine to 500r/min, and adding the film aid, the thickening agent, the pigment dispersing agent and the defoaming agent into the multi-purpose machine and continuously mixing for 1 h;
s3, pigment addition: sieving pigment and filler with 200 mesh sieve, and stirring in a multi-purpose machine at 2000r/min for 30min to obtain dispersion;
s4, grinding: grinding the dispersion liquid obtained in the step S3 at the rotation speed of 1500r/min for 20 min;
s5, mixing: adjusting the rotation speed of the multipurpose machine to 200-300r/min, adding the emulsion and the auxiliary agent, continuously stirring at the temperature of 85 ℃ for 1-2h, then filtering the liquid, and transferring the filtered liquid into a storage tank to finish the preparation.
Preferably, the multipurpose machine is a grinding, dispersing and stirring all-in-one machine.
Preferably, the auxiliary agent is ethylene glycol butyl ether and propylene glycol according to the weight ratio of 1.5: mixing at a ratio of 0.8.
Preferably, the ratio of the emulsion added to the total liquid is 1: 4.
Preferably, the emulsion is prepared by the following steps:
a1, a silane grinding agent, xylene, electrodeless nano particles and a stabilizer are weighed according to the weight;
2, adding a silane grinding agent, xylene and electrodeless nanoparticles into a high-speed dispersion machine for stirring, wherein the rotating speed is 1200r/min, the temperature is 45 ℃, refluxing, adding a stabilizer after 20min, and continuing stirring for 2 h;
a3, washing the solution prepared in the a2 by acetone for multiple times, filtering, and drying in an oven for 4 hours at 50 ℃;
a4, and a3 was filtered through a sieve (80 mesh) to obtain an emulsion.
Preferably, the stabilizer is specifically hexamethyldisilazane-modified nano silicon dichloride.
Preferably, in the step a2, the stirring is performed by using a high-speed disperserAdding protective gas N into the stirring tank2。
(III) advantageous effects
Compared with the prior art, the preparation method of the water-based paint nano composite material provided by the embodiment of the invention has the advantages that the polymer monomer molecules are small, the viscosity is low, and the inorganic nanoparticles are easy to uniformly disperse after the surface is effectively modified, so that the filling particles of the composite material prepared by the in-situ dispersion polymerization method are uniformly dispersed, the nano characteristics of the particles are intact, and the mechanical strength, the thermal stability, the water resistance and other properties of a water-based polymer emulsion coating film can be obviously improved by compounding the nano material and the water-based polymer emulsion.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a preparation method of a water-based paint nano composite material, which comprises the following steps:
preparing materials; the paint comprises a nano water-based compound, a film assistant, water, a thickening agent, a pigment dispersing agent, a defoaming agent, an emulsion, a pigment, a filler and an assistant;
mixing materials: firstly, putting the nano water-based compound and water into a multi-purpose machine, stirring at 1200r/min for 20min, then adjusting the rotating speed of the multi-purpose machine to 500r/min, and adding the film aid, the thickening agent, the pigment dispersing agent and the defoaming agent into the multi-purpose machine and continuously mixing for 1 h;
pigment addition: sieving pigment and filler with 200 mesh sieve, and stirring in a multi-purpose machine at 2000r/min for 30min to obtain dispersion;
grinding: grinding the dispersion liquid obtained in the step S3 at the rotation speed of 1500r/min for 20 min;
mixing: adjusting the rotation speed of the multipurpose machine to 200-300r/min, adding the emulsion and the auxiliary agent, continuously stirring at the temperature of 85 ℃ for 1-2h, then filtering the liquid, and transferring the filtered liquid into a storage tank to finish the preparation.
Wherein, the multipurpose machine is a grinding, dispersing and stirring integrated machine.
And the auxiliary agent is ethylene glycol butyl ether and propylene glycol according to the proportion of 1.5: mixing at a ratio of 0.8.
And the ratio of the added emulsion to the total liquid is 1: 4.
Further, the preparation steps of the emulsion in the invention are as follows:
firstly, weighing a silane grinding agent, dimethylbenzene, electrodeless nano particles and a stabilizing agent according to weight;
secondly, adding the silane grinding agent, the dimethylbenzene and the electrodeless nano particles into a high-speed dispersion machine for stirring, and adding protective gas N2The rotating speed of the high-speed dispersion machine is 1200r/min, the temperature is 45 ℃, reflux is carried out, and after 20min, a stabilizing agent is added and stirring is continued for 2 h;
thirdly, washing the prepared solution by acetone for multiple times, filtering, and drying in an oven for 4 hours at the temperature of 50 ℃;
in the fourth step, the obtained material was filtered through a sieve (80 mesh) to obtain an emulsion.
Further, the stabilizer mentioned in the invention is specifically hexamethyldisilazane modified nano silicon dichloride.
Example 1
Under the optimal condition of orthogonal experiment, the other experiment conditions are kept unchanged, and the single-factor experiment is carried out by only changing the mass fraction of the monomer amount of the emulsion in the experiment to the total monomer amount.
The results of the experiment are shown in the following table:
from the experimental results, it was found that as the amount of the emulsion monomer increases, the conversion rate increases and then decreases, the residue rate decreases and then increases, and the turning points are all at positions where the amount of the emulsion monomer accounts for 25% of the total monomer amount, and in this case, the water absorption of the emulsion coating film is slightly higher than 15%, but the conversion rate is the highest, the residue rate is the lowest, and the coating film hardness is also the highest.
Example 2
Under the optimal condition of orthogonal experiment, other experiment conditions are kept unchanged, and only the temperature in the preparation method is changed to carry out single-factor experiment.
The results of the experiment are shown in the following table:
from the results of the experiments, it was found that the conversion was the highest, the residue rate was the lowest, and the coating film hardness was the highest when the mixing temperature of the emulsion and the dispersion was 85 ℃.
In conclusion, in the preparation method of the water-based paint nano composite material provided by the invention, as the polymer monomer molecules are smaller and have low viscosity, and the inorganic nanoparticles are easy to uniformly disperse after the surface is effectively modified, the filling particles of the composite material prepared by the in-situ dispersion polymerization method are uniformly dispersed, the nano characteristics of the particles are intact, and the properties of the water-based polymer emulsion coating film, such as mechanical strength, thermal stability, water resistance and the like, can be obviously improved by compounding the nano material and the water-based polymer emulsion.
In the preparation method of the water-based paint nanocomposite material provided by the invention, the proportion of the raw materials is not required to be disclosed and explained.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The preparation method of the water-based paint nanocomposite is characterized by comprising the following steps:
s1, material preparation: the paint comprises a nano water-based compound, a film assistant, water, a thickening agent, a pigment dispersing agent, a defoaming agent, an emulsion, a pigment, a filler and an assistant;
s2, mixing materials: firstly, putting the nano water-based compound and water into a multipurpose machine, stirring at 1200r/min for 20min, then adjusting the rotating speed of the multipurpose machine to 500r/min, adding the film aid, the thickening agent, the pigment dispersing agent and the defoaming agent, and continuously mixing for 1 h;
s3, pigment addition: sieving pigment and filler with 200 mesh sieve, and stirring in a multi-purpose machine at 2000r/min for 30min to obtain dispersion;
s4, grinding: grinding the dispersion liquid obtained in the step S3 at the rotation speed of 1500r/min for 20 min;
s5, mixing: adjusting the rotation speed of the multipurpose machine to 200-300r/min, adding the emulsion and the auxiliary agent, continuously stirring at the temperature of 85 ℃ for 1-2h, then filtering the liquid, and transferring the filtered liquid into a storage tank to finish the preparation.
2. The method for preparing the water-based paint nanocomposite as claimed in claim 1, wherein the multi-purpose machine is a grinding, dispersing and stirring integrated machine.
3. The preparation method of the water-based paint nanocomposite material according to claim 1, wherein the auxiliary agent is ethylene glycol butyl ether and propylene glycol according to a ratio of 1.5: mixing at a ratio of 0.8.
4. The method of claim 1, wherein the ratio of the emulsion added to the total liquid is 1: 4.
5. The method of claim 1, wherein the emulsion is prepared by the steps of:
a1, a silane grinding agent, xylene, electrodeless nano particles and a stabilizer are weighed according to the weight;
2, adding a silane grinding agent, xylene and electrodeless nanoparticles into a high-speed dispersion machine for stirring, wherein the rotating speed is 1200r/min, the temperature is 45 ℃, refluxing, adding a stabilizer after 20min, and continuing stirring for 2 h;
a3, washing the solution prepared in the a2 by acetone for multiple times, filtering, and drying in an oven for 4 hours at 50 ℃;
a4, and a3 was filtered through a sieve (80 mesh) to obtain an emulsion.
6. The method for preparing the water-based paint nanocomposite as claimed in claim 5, wherein the stabilizer is hexamethyldisilazane modified nano silicon dichloride.
7. The method for preparing the water-based paint nanocomposite as claimed in claim 5, wherein the protective gas N is added into the stirring tank during the stirring in the step a2 by using a high-speed disperser2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911327846.5A CN111154405A (en) | 2019-12-20 | 2019-12-20 | Preparation method of water-based paint nano composite material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911327846.5A CN111154405A (en) | 2019-12-20 | 2019-12-20 | Preparation method of water-based paint nano composite material |
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| CN111154405A true CN111154405A (en) | 2020-05-15 |
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| CN201911327846.5A Withdrawn CN111154405A (en) | 2019-12-20 | 2019-12-20 | Preparation method of water-based paint nano composite material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115651480A (en) * | 2022-11-02 | 2023-01-31 | 甘肃爱纬思节能建材有限责任公司 | Preparation method of water-based paint nano composite material |
| CN115888508A (en) * | 2023-02-21 | 2023-04-04 | 喜跃发国际环保新材料股份有限公司 | Processing technology and processing system of water-based paint |
-
2019
- 2019-12-20 CN CN201911327846.5A patent/CN111154405A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115651480A (en) * | 2022-11-02 | 2023-01-31 | 甘肃爱纬思节能建材有限责任公司 | Preparation method of water-based paint nano composite material |
| CN115888508A (en) * | 2023-02-21 | 2023-04-04 | 喜跃发国际环保新材料股份有限公司 | Processing technology and processing system of water-based paint |
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Application publication date: 20200515 |