CN114350214A - Preparation method of acrylic acid real stone paint emulsion with high mechanical stability - Google Patents
Preparation method of acrylic acid real stone paint emulsion with high mechanical stability Download PDFInfo
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- CN114350214A CN114350214A CN202210091986.2A CN202210091986A CN114350214A CN 114350214 A CN114350214 A CN 114350214A CN 202210091986 A CN202210091986 A CN 202210091986A CN 114350214 A CN114350214 A CN 114350214A
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Abstract
The invention discloses a preparation method of acrylic acid real stone paint emulsion with high mechanical stability, which adopts an anionic-nonionic emulsifier, has good emulsification effect, reduces negative influence on the emulsion and the water resistance of the prepared real stone paint, and has better foam effect during high-speed stirring when the synthesized emulsion is used for producing the real stone paint coating, thereby reducing the friction force between the real stone paints and indirectly endowing the emulsion with high mechanical stability; meanwhile, the silane coupling agent is added in the later polymerization stage, so that the hydrolysis of the coupling agent is reduced, the crosslinking of the coupling agent and the monomer is increased, and the emulsion is endowed with high water resistance and high mechanical stability.
Description
Technical Field
The invention relates to the technical field of acrylic acid stone-like paint emulsion, in particular to a preparation method of acrylic acid stone-like paint emulsion with high mechanical stability.
Background
In the coating industry, along with the expansion of equipment for producing the real stone paint by customers, the quality of sand is deteriorated, the powder content in the sand is increased, and along with the market requirements of decoration directions and cost requirements, the stability of emulsion and the real stone paint can be maintained for a long time under the stirring regulation of high shearing force is sought.
Compared with a plurality of real stone paint emulsions in the market, the emulsion is prepared by conventional monomers of styrene and acrylic ester and utilizing a conventional synthesis technology, and the emulsion can solve the problem that the stability of the product cannot be kept well for a long time under the stirring regulation of high shearing force at present. If the emulsion is broken due to poor stability, the real stone paint is dried, excessive water is lost, and the bonding strength is greatly reduced.
The invention relates to a preparation method and application of an acrylic real stone paint emulsion with high mechanical stability. In comparison with the common single-component acrylic resin, the acrylic resin prepared by the invention can keep certain foam characteristics when being stirred and dispersed at a high speed in the production of the real stone paint by using the special emulsifier, thereby reducing the friction force of the real stone paint in stirring; the wetting property of the product is increased by adding the organic silicon monomer, and the product has a water retention effect on the real stone paint at a high temperature and slows down the volatilization of water. The two characteristics are combined, so that the real stone paint emulsion can keep good mechanical stability when being used for producing real stone paint.
Disclosure of Invention
The invention aims to provide a preparation method of acrylic real stone paint emulsion with high mechanical stability to solve the technical problems
In order to solve the technical problems, the invention provides a preparation method of an acrylic acid real stone paint emulsion with high mechanical stability, which comprises the following steps:
fully stirring and mixing the emulsifier and water for 15-30 minutes, adding the acrylate monomer and the special functional monomer, and stirring and emulsifying for 30-60 minutes to obtain the emulsion. Preparing materials in a reaction kettle, uniformly stirring an emulsifier and water, heating the reaction kettle to 84-86 ℃, uniformly dripping the emulsion prepared in the step 1 at a constant speed, simultaneously dripping an initiator solution, simultaneously dripping the emulsion and the initiator solution for 3-4 hours, and reacting at 85-87 ℃. Adding an organosilicon coupling agent when the temperature is 1/5 drop by drop, then normally dropping, carrying out heat preservation reaction for 1-2 hours, cooling to 70 ℃, then eliminating, and carrying out heat preservation reaction for 1 hour after the elimination is finished. After the heat preservation is finished, the temperature is reduced to be below 40 ℃, and the acrylic acid real stone paint emulsion with high mechanical stability can be obtained after filtering and discharging.
Preferably, the acrylic ester monomers comprise, by weight, 180-200 parts of styrene, 130-150 parts of methyl methacrylate, 320-350 parts of butyl acrylate, 10-15 parts of acrylamide, 15-20 parts of acrylic acid, 250-350 parts of butyl acrylate and 10-20 parts of organosilicon coupling agent.
Preferably, the acrylamide is 100% solids and the silane coupling agent is vinyltrimethoxysilane A-171.
Preferably, the emulsifier is an anionic-nonionic emulsifier and is disodium decyl polyoxyethylene (6) ether sulfosuccinate, and accounts for 1.0-2.0% of the total amount of the monomers.
Preferably, the initiator solution is ammonium persulfate, and the amount of the initiator is 0.05-0.08% of the total amount of the monomers.
Preferably, the post-treatment is performed with the oxidant tert-butyl hydroperoxide and the reducing agent is FF 6M.
Compared with the prior art, the invention has the beneficial effects that: the anionic-nonionic emulsifier is adopted, so that the emulsion has a good emulsifying effect, the negative influence on the water resistance of the emulsion and the prepared real stone paint is reduced, and the synthesized emulsion has a good foaming effect during high-speed stirring when the real stone paint is produced, so that the friction force between the real stone paints is reduced, and the high mechanical stability of the emulsion is indirectly endowed;
meanwhile, the silane coupling agent is added in the later polymerization stage, so that the hydrolysis of the coupling agent is reduced, the crosslinking of the coupling agent and the monomer is increased, and the emulsion is endowed with high water resistance and high mechanical stability.
Detailed Description
The present invention will now be described in detail and specifically with reference to the following examples in order to facilitate a better understanding of the invention, but the following examples are not intended to limit the scope of the invention.
Example 1: a) preparing emulsion, weighing 280g of deionized water and 1025 g of emulsifier A, stirring for 15 minutes, adding 180g of styrene, 154g of methyl ester, 338g of butyl acrylate and isooctyl acrylate, 12g of acrylamide and 18g of acrylic acid, and stirring for 30 minutes to obtain the pre-emulsion.
b) The kettle bottom material was prepared by weighing 350g of deionized water and 4g A-102 emulsifier and stirring for 10 minutes.
c) When the temperature in the vessel had risen to 85 ℃, 12g of an ammonium persulfate solution (1.2 g of ammonium persulfate dissolved in 10g of water) was added and reacted for 5 minutes.
d) The remaining emulsion and 80g ammonium persulfate solution (3.3 g ammonium persulfate dissolved in 80g water) were added dropwise for 3 hours, vinyltrimethoxysilane was added dropwise to 1/5 of the emulsion, and the reaction temperature was controlled at 85-87 ℃.
e) After the completion of the dropwise addition, the reaction was carried out under heat for 1 hour. The temperature was reduced to 70 ℃ and aqueous tert-butyl hydroperoxide (1 g of tert-butyl hydroperoxide dissolved in 25g of water) was added, 10 minutes apart, aqueous FF6M (0.8 g of FF6M dissolved in 25g of water) was added and the incubation was completed for 1 hour.
f) And after the heat preservation is finished, cooling to below 40 ℃, neutralizing with ammonia water to adjust the pH value to 7.5-7.8, adjusting the solid content to 45%, filtering with 200-mesh filter cloth, and discharging to obtain the acrylic resin finished product with the viscosity of more than 100 mPa.s.
The acrylic resin prepared in this example was adjusted in pH with ammonia; testing the emulsion was made into a stone-like paint (emulsion add-on 12%), stone-like paint formulation: 65g of true stone paint liquid material, 60g of emulsion, 225g of chicken blood red 80-120 mesh sand and 150g of chrysanthemum yellow 80-120 mesh sand. Under the condition of room temperature of 20-22 ℃, the real mineral varnish is uninterruptedly dispersed for 40 minutes at high speed at 2000 revolutions, and is cooled to the room temperature, the real mineral varnish does not break emulsion and dry, and the real mineral varnish has great advantages compared with competitive products on the market.
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. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (6)
1. The preparation method of the acrylic real stone paint emulsion with high mechanical stability is characterized by comprising the following steps:
(1) fully stirring and mixing an emulsifier and water for 15-30 minutes, adding an acrylate monomer and a special functional monomer, and stirring and emulsifying for 30-60 minutes to obtain an emulsion;
(2) preparing materials in a reaction kettle, uniformly stirring an emulsifier and water, heating the reaction kettle to 84-86 ℃, uniformly dripping the emulsion prepared in the step (1) at a constant speed, dripping an initiator solution, simultaneously dripping the emulsion and the initiator solution for 3-4 hours, and reacting at 85-87 ℃;
(3) adding an organosilicon coupling agent when the residual 1/5 of the emulsion in the step (1) is added dropwise, then normally adding dropwise, reacting for 1-2 hours under heat preservation, cooling to 70 ℃, then eliminating, and reacting for 1 hour under heat preservation after the elimination is finished;
(4) after the heat preservation is finished, the temperature is reduced to be below 40 ℃, and the acrylic acid real stone paint emulsion with high mechanical stability can be obtained after filtering and discharging.
2. The method as claimed in claim 1, wherein the acrylic ester monomers comprise, by weight, 180-200 parts of styrene, 130-150 parts of methyl methacrylate, 320-350 parts of butyl acrylate, 10-15 parts of acrylamide, 15-20 parts of acrylic acid, 250-350 parts of butyl acrylate, and 10-20 parts of organosilicon coupling agent.
3. The method of claim 1, wherein the acrylamide is 100% solids and the silane coupling agent is vinyltrimethoxysilane A-171.
4. The method for preparing the acrylic real stone paint emulsion with high mechanical stability as claimed in claim 1, wherein the emulsifier is an anionic-nonionic emulsifier and is disodium decyl polyoxyethylene (6) ether ester sulfosuccinate, and the content of the disodium decyl polyoxyethylene (6) ether ester is 1.0-2.0% of the total amount of the monomers.
5. The method for preparing the acrylic real stone paint emulsion with high mechanical stability as claimed in claim 1, wherein the initiator solution is ammonium persulfate, and the amount of the initiator is 0.05-0.08% of the total amount of the monomers.
6. The method for preparing the acrylic real stone paint emulsion with high mechanical stability as claimed in claim 1, wherein the post-treatment is performed by using tert-butyl hydroperoxide as an oxidant and FF6M as a reducing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210091986.2A CN114350214A (en) | 2022-01-26 | 2022-01-26 | Preparation method of acrylic acid real stone paint emulsion with high mechanical stability |
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| CN202210091986.2A CN114350214A (en) | 2022-01-26 | 2022-01-26 | Preparation method of acrylic acid real stone paint emulsion with high mechanical stability |
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Application publication date: 20220415 |