CN112830991A - High-gloss low-odor water-based acrylic emulsion and preparation method and application thereof - Google Patents

High-gloss low-odor water-based acrylic emulsion and preparation method and application thereof Download PDF

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CN112830991A
CN112830991A CN202110147098.3A CN202110147098A CN112830991A CN 112830991 A CN112830991 A CN 112830991A CN 202110147098 A CN202110147098 A CN 202110147098A CN 112830991 A CN112830991 A CN 112830991A
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emulsion
acrylic emulsion
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CN112830991B (en
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陈丙山
于兰英
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Shandong Huacheng High Tech Adhesive Co ltd
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    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F212/00Copolymers 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 an aromatic carbocyclic ring
    • C08F212/02Monomers containing only one unsaturated aliphatic radical
    • C08F212/04Monomers containing only one unsaturated aliphatic radical containing one ring
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    • C08F2/00Processes of polymerisation
    • C08F2/12Polymerisation in non-solvents
    • C08F2/16Aqueous medium
    • C08F2/22Emulsion polymerisation
    • C08F2/24Emulsion polymerisation with the aid of emulsifying agents
    • C08F2/26Emulsion polymerisation with the aid of emulsifying agents anionic
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10Esters
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    • C08F220/14Methyl esters, e.g. methyl (meth)acrylate
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    • C09D125/00Coating 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 an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
    • C09D125/02Homopolymers or copolymers of hydrocarbons
    • C09D125/04Homopolymers or copolymers of styrene
    • C09D125/08Copolymers of styrene
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    • C09D133/00Coating 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
    • C09D133/24Homopolymers or copolymers of amides or imides
    • C09D133/26Homopolymers or copolymers of acrylamide or methacrylamide
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D143/00Coating 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 containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
    • C09D143/04Homopolymers or copolymers of monomers containing silicon

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Abstract

The invention discloses a high-gloss low-odor water-based acrylic emulsion, a preparation method and application thereof, wherein the acrylic emulsion mainly comprises a soft monomer, a hard monomer, acrylic acid, a crosslinking monomer, an emulsifier, an initiator, a buffering agent, a bactericide and water, the glossiness is increased, the wear resistance is increased, but the water resistance is reduced by controlling the proportion of the acrylic acid and acrylamide, but the problem of poor water resistance can be effectively solved by adding the crosslinking monomer such as vinyl triethoxysilane, and the wear resistance is improved.

Description

High-gloss low-odor water-based acrylic emulsion and preparation method and application thereof
Technical Field
The invention belongs to the technical field of polymer synthesis, and particularly relates to a high-gloss low-odor aqueous acrylic emulsion, and a preparation method and application thereof.
Background
The water-based acrylic resin not only has the advantages of stability, weather resistance, light resistance, chemical resistance and the like, but also has the advantages of corrosion resistance, alkali resistance, water resistance, good film forming property, good color retention, no pollution, good construction performance, high use safety and the like. Therefore, the paint has the advantages of rapid development, is the pollution-free paint with the fastest development and the most varieties in the water-based paint, has become the most applied variety in the water-based paint, and is widely applied to water-based wood paint, water-based plastic paint, water-based metal paint and the like.
The water-based paint is a paint using water as a solvent or a dispersion medium, and has the advantages of good protection property, good corrosion resistance and the like
Compared with oil-based paint, the production of water-based paint can save resources, and the pollution in the production and use processes is small, so that the application is more and more extensive. With the enhancement of environmental awareness of people, water-based products are more and more popular with people, the use range is wider, and the current domestic acrylic emulsion products have the defects of low glossiness or large residual smell, so that the application of the acrylic emulsion products in the field of surface coatings is limited.
Disclosure of Invention
Aiming at the problems of low glossiness or large residual smell of an acrylic emulsion product in the prior art, the invention provides the high-glossiness low-smell water-based acrylic emulsion, and the preparation method and the application thereof.
The invention is realized by the following technical scheme:
the high-gloss low-odor water-based acrylic emulsion is characterized by comprising the following components in parts by weight: 10-30 parts of soft monomer, 14-40 parts of hard monomer, 1-10 parts of acrylic acid, 0.01-3 parts of crosslinking monomer, 0.5-5 parts of emulsifier, 0.2-0.8 part of initiator, 0.1-0.5 part of buffering agent, 0.01-0.3 part of bactericide and 40-70 parts of deionized water;
the hard monomer is more than one of methyl methacrylate, tert-butyl methacrylate and styrene;
the soft monomer is more than one of butyl acrylate, isooctyl acrylate and ethyl acrylate;
the crosslinking monomer is more than one of acrylamide, vinyl triethoxysilane, vinyl trimethoxysilane and isobutyl triethoxysilane.
Further, the crosslinking monomer is acrylamide.
Further, the emulsifier is more than one of sodium dodecyl sulfate, sodium dodecyl diphenyl ether disulfonate, (C12-C14) fatty alcohol ether sodium sulfate and ethoxylated alkyl sulfate.
Further, the emulsifier is a mixture of sodium dodecyl sulfate and ethoxylated alkyl sulfate.
Further, the initiator is more than one of sodium persulfate, ammonium persulfate, potassium persulfate and tert-butyl hydroperoxide; the buffer is sodium bicarbonate.
In the invention, the preparation method of the acrylic emulsion comprises the following steps:
(1) adding part of emulsifier into water, stirring uniformly to obtain rich foam, adding soft monomer, hard monomer, acrylic acid and crosslinking monomer, and stirring for 20-30min to obtain pre-emulsion;
(2) adding an initiator into water for dissolving to obtain an initiating solution;
(3) adding the rest of emulsifier and buffer into water, stirring and heating to 80-85 ℃, adding 5-15% of pre-emulsion prepared in the step (1), stirring for 5 minutes, adding 10-20% of priming solution (2) prepared in the step (2), keeping the temperature for 20 minutes after the reaction turns blue, then dropwise adding the rest of pre-emulsion and the rest of priming solution for 3-3.5 hours at the dropwise adding reaction temperature of 82-84 ℃, continuing the heat preservation reaction at 85-86 ℃ for 1.5-2 hours after the dropwise adding is finished, removing residual monomers when the temperature is reduced to 70 ℃, reducing the temperature to below 40 ℃, adjusting the pH to 7-8 by using ammonia water, adding bactericide, and filtering to obtain the high-gloss low-odor aqueous acrylic emulsion.
Further, the crosslinking monomer described in step (1) may also be added at the second addition of the initiator in step (3).
Further, the mass ratio of the emulsifying agent in the step (1) to the emulsifying agent in the step (2) is 1-4: 1.
the invention discloses application of the high-gloss and low-odor acrylic emulsion in coating films on metal surfaces.
The acrylic emulsion prepared by the invention has the advantages that the glossiness is improved, the wear resistance is improved along with the increase of the proportion of the acrylic acid and the acrylamide, but the water resistance is reduced because the water solubility of the emulsion is increased along with the increase of the water-soluble monomer, so the water resistance is reduced, but the problem of poor water resistance can be effectively solved and the wear resistance is improved simultaneously through the addition of the crosslinking monomer such as the vinyltriethoxysilane.
The addition of the emulsifier can increase the amount of the formed colloidal particles, thereby reducing the particle size of the formed emulsion particles and improving the glossiness. The buffering agent can improve the reaction rate of acrylic emulsion polymerization and increase the stability of the emulsion. The addition of acrylic acid can increase gloss, but an excess of acrylic acid causes a decrease in water resistance, and the addition of a crosslinking monomer can solve this problem. The crosslinking dosage is less in the later stage of the reaction, so that the cost performance is improved, the cost is reduced, and the odor of the acrylic emulsion can be effectively reduced by controlling the addition modes and the addition amounts of the initiator and the emulsifier.
Advantageous effects
(1) The high-gloss low-odor water-based acrylic emulsion has the advantages of easily available raw materials, low price, suitability for industrial production and easiness in popularization and application;
(2) the preparation method of the high-gloss low-odor water-based acrylic emulsion is simple and convenient, the temperature is easy to control, and the obtained emulsion has small particle size and is uniform in distribution;
(3) the high-gloss low-odor water-based acrylic emulsion prepared by the invention has very high gloss, excellent adhesion and adhesion resistance when being coated on gold powder, silver powder or other metal materials.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention in conjunction with the following examples, but it will be understood that the description is intended to illustrate the features and advantages of the invention further, and not to limit the invention.
Example 1
(1) Adding 0.3g of sodium dodecyl sulfate and 0.26g of ethoxylated alkyl sulfate into 8.5g of deionized water, adding 17.96g of butyl acrylate, 3g of acrylic acid, 22.93g of styrene and 0.4g of acrylamide after uniformly stirring to enrich foams, and stirring for 20min to obtain a pre-emulsion;
(2) adding 0.24g of ammonium persulfate into 20g of deionized water, and uniformly stirring to obtain a priming solution;
(3) adding 0.14g of sodium bicarbonate, 0.26g of sodium dodecyl sulfate and 0.24g of ethoxylated alkyl sulfate into 33.5g of deionized water, starting stirring, heating to 80-85 ℃, adding 10% of the pre-emulsion prepared in the step (1), stirring for 5 minutes, adding 15% of the priming solution prepared in the step (2), preserving heat for 15 minutes after the reaction turns blue, then dropwise adding the rest of the pre-emulsion and the rest of the priming solution for 3 hours at the reaction temperature of 82-84 ℃, continuing the heat preservation reaction for 2 hours at 85-86 after the dropwise addition is finished, removing the residual monomers twice when the temperature is reduced to 70 ℃, cooling to below 40 ℃, adjusting the pH to =7.8 by using ammonia water, adding 0.1g of a bactericide, and filtering to obtain the high-gloss low-odor aqueous acrylic emulsion.
Example 2
(1) Adding 0.4g of sodium dodecyl sulfate and 0.5g of ethoxylated alkyl sulfate into 14g of deionized water, adding 16.49g of butyl acrylate, 4g of acrylic acid, 30.0g of styrene and 0.6g of acrylamide after uniformly stirring to enrich foams, and stirring for 30min to obtain a pre-emulsion;
(2) adding 0.35g of ammonium persulfate into 20g of deionized water, and uniformly stirring to obtain a priming solution;
(3) adding 0.24g of sodium bicarbonate, 0.1g of sodium dodecyl sulfate and 0.5g of ethoxylated alkyl sulfate into 29g of deionized water, starting stirring, heating to 80-85 ℃, adding 5% of the pre-emulsion prepared in the step (1), stirring for 5 minutes, adding 10% of the priming solution prepared in the step (2), preserving heat for 15 minutes after the reaction turns blue, dropwise adding the rest of the pre-emulsion and the rest of the priming solution for 3 hours at the reaction temperature of 82-84 ℃, continuing to react for 2 hours at the reaction temperature of 85-86 after the dropwise addition is finished, removing residual monomers twice when the temperature is reduced to 70 ℃, cooling to below 40 ℃, adjusting the pH to =7.4 by using ammonia water, adding 0.1g of bactericide, and filtering to obtain the high-gloss low-odor aqueous acrylic emulsion.
Example 3
(1) Adding 0.2g of sodium dodecyl sulfate and 0.1g of ethoxylated alkyl sulfate into 11g of deionized water, adding 16.80g of butyl acrylate, 3g of acrylic acid and 25.08g of styrene after uniformly stirring to enrich foams, and stirring for 25min to obtain a pre-emulsion;
(2) adding 0.23g of ammonium persulfate into 20g of deionized water, and uniformly stirring to obtain a priming solution;
(3) adding 0.13g of sodium bicarbonate, 0.2g of sodium dodecyl sulfate and 0.1g of ethoxylated alkyl sulfate into 21.9g of deionized water, starting stirring, heating to 80-85 ℃, adding 15% of the pre-emulsion prepared in the step (1), stirring for 5 minutes, adding 10% of the trigger solution prepared in the step (2), keeping the temperature for 15 minutes after the reaction turns blue, dropwise adding the rest of the pre-emulsion and the rest of the trigger solution for 3 hours, keeping the dropwise addition reaction temperature at 82-84 ℃, adding 0.2g of acrylamide, stirring uniformly, continuously dropwise adding the acrylamide again when 66% of the pre-emulsion prepared in the step is dropwise added, keeping the temperature for 2 hours after the dropwise adding is finished, and removing residual monomers twice when the temperature is reduced to 70 ℃. Cooling to below 40 deg.C, adjusting pH =7.5 with ammonia water, adding bactericide 0.1g, and filtering to obtain a high-gloss low-odor aqueous acrylic emulsion.
Example 4
(1) Adding 0.3g of sodium dodecyl sulfate and 0.1g of ethoxylated alkyl sulfate into 12g of deionized water, adding 14.68g of butyl acrylate, 3g of acrylic acid, 29.43g of methyl methacrylate and 0.4g of vinyl triethoxysilane after uniformly stirring to enrich foams, and stirring for 20min to obtain a pre-emulsion;
(2) adding 0.3g of ammonium persulfate into 20g of deionized water, and uniformly stirring to obtain a priming solution;
(3) adding 0.13g of sodium bicarbonate, 0.2g of sodium dodecyl sulfate and 0.1g of ethoxylated alkyl sulfate into 27g of deionized water, starting stirring, heating to 80-85 ℃, adding 15% of the pre-emulsion prepared in the step (1), stirring for 5 minutes, adding 10% of the priming solution prepared in the step (2), preserving heat for 15 minutes after the reaction turns blue, dropwise adding the rest of the pre-emulsion and the rest of the priming solution for 3 hours, wherein the dropwise adding reaction temperature is 82-84 ℃, when 66% of the pre-emulsion prepared in the step (1) is dropwise added, adding 0.37g of vinyltriethoxysilane, uniformly stirring, continuously dropwise adding, and preserving heat for 2 hours at 85-86 ℃ after the dropwise adding is finished. And (3) cooling to 70 ℃, removing residual monomers twice, cooling to below 40 ℃, adjusting the pH to be =7.6 by using ammonia water, adding 0.1g of bactericide, and finally filtering to obtain the high-gloss and low-odor aqueous acrylic emulsion.
Example 5
(1) Adding 0.3g of sodium dodecyl sulfate and 0.1g of ethoxylated alkyl sulfate into 11g of deionized water, adding 17.96g of butyl acrylate, 4g of acrylic acid, 22.93g of methyl methacrylate and 0.5g of acrylamide after uniformly stirring to generate rich foam, and stirring for 25min to obtain a pre-emulsion;
(2) adding 0.27g of ammonium persulfate into 20g of deionized water, and uniformly stirring to obtain a priming solution;
(3) adding 0.13g of sodium bicarbonate, 0.1g of sodium dodecyl sulfate and 0.2g of ethoxylated alkyl sulfate into 31.31g of deionized water, starting stirring, heating to 80-85 ℃, adding 12% of the pre-emulsion prepared in the step (1), stirring for 5 minutes, adding 10% of the priming solution (2) prepared in the step (2), keeping the temperature for 15 minutes after the reaction turns blue thoroughly, dropwise adding the rest of the pre-emulsion (1) and the rest of the priming solution (2), wherein the dropwise adding time is 3 hours, the dropwise adding reaction temperature is 82-84 ℃, adding 0.5g of vinyltriethoxysilane when 66% of the pre-emulsion prepared in the step (1) is dropwise added, uniformly stirring and continuously dropwise adding, and keeping the temperature for reaction for 2 hours after the dropwise adding is finished, wherein the ethoxylated alkyl sulfate is 0.2 g. And (3) cooling to 70 ℃, removing residual monomers twice, cooling to below 40 ℃, adjusting the pH to be =7.8 by using ammonia water, adding 0.1g of bactericide, and finally filtering to obtain the high-gloss and low-odor aqueous acrylic emulsion.
Comparative example 1
(1) Adding 0.3g of sodium dodecyl sulfate and 0.14g of ethoxylated alkyl sulfate into 12.5g of deionized water, adding 18.65g of butyl acrylate, 26.11g of methyl methacrylate and 3g of acrylic acid after uniformly stirring to enrich foams, and stirring for 25min to obtain a pre-emulsion;
(2) adding 0.30g of ammonium persulfate into 20g of deionized water, and uniformly stirring to obtain a priming solution;
(3) adding 0.2g of sodium bicarbonate, 0.2g of sodium dodecyl sulfate and 0.1g of ethoxylated alkyl sulfate into 17.4g of deionized water, starting stirring, heating to 80-85 ℃, adding 15% of the pre-emulsion prepared in the step (1), stirring for 5 minutes, adding 15% of the trigger solution prepared in the step (2), keeping the temperature for 15 minutes after the reaction turns blue, dropwise adding the rest of the pre-emulsion and the rest of the trigger solution for 3 hours at the reaction temperature of 82-84 ℃, continuing the heat preservation reaction for 1.5-2 hours at 85-86 after the dropwise addition is finished, removing the residual monomers twice when the temperature is reduced to 70 ℃, cooling to below 40 ℃, adjusting the pH to =7.5 by using ammonia water, adding 0.1g of a bactericide, and filtering to obtain the acrylic emulsion.
Comparative example 2
(1) Adding 0.4g of sodium dodecyl sulfate and 0.5g of ethoxylated alkyl sulfate into 14g of deionized water, adding 16.49g of butyl acrylate, 4g of acrylic acid, 30.0g of styrene, 0.8g of acrylamide, 0.1g of sodium dodecyl sulfate and 0.5g of ethoxylated alkyl sulfate after uniformly stirring to generate rich foam, and stirring for 30min to obtain a pre-emulsion;
(2) adding 0.35g of ammonium persulfate into 20g of deionized water, and uniformly stirring to obtain a priming solution;
(3) adding 0.24g of sodium bicarbonate into 29g of deionized water, starting stirring, heating to 80-85 ℃, adding 5% of the pre-emulsion prepared in the step (1), stirring for 5 minutes, adding 10% of the priming solution prepared in the step (2), keeping the temperature for 15 minutes after the reaction turns blue, then dropwise adding the rest of the pre-emulsion and the rest of the priming solution for 3 hours at the dropwise adding reaction temperature of 82-84 ℃, continuing to keep the temperature for reaction for 2 hours after the dropwise adding is finished, removing the residual monomers twice when the temperature is reduced to 70 ℃, reducing the temperature to below 40 ℃, adjusting the pH to be 7.5 by using ammonia water, adding 0.1g of a bactericide, and filtering to obtain the acrylic emulsion.
Comparative example 3
(1) Adding 0.4g of sodium dodecyl sulfate and 0.5g of ethoxylated alkyl sulfate into 14g of deionized water, adding 16.49g of butyl acrylate, 4g of acrylic acid, 30.0g of styrene and 0.8g of acrylamide after uniformly stirring to enrich foams, and stirring for 30min to obtain a pre-emulsion;
(2) adding 0.35g of ammonium persulfate into 20g of deionized water, and uniformly stirring to obtain a priming solution;
(3) adding 0.24g of sodium bicarbonate, 0.1g of sodium dodecyl sulfate and 0.5g of ethoxylated alkyl sulfate into 29g of deionized water, starting stirring, heating to 80-85 ℃, dropwise adding the pre-emulsion in the step (1) and the priming solution in the step (2) for 3.5h, keeping the temperature for 2h after dropwise adding at 82-84 ℃, continuously reacting for 85-86 h, removing residual monomers twice when cooling to 70 ℃, cooling to below 40 ℃, adjusting the pH to =7.5 by using ammonia water, adding 0.1g of a bactericide, and filtering the acrylic emulsion.
Performance testing
The acrylic emulsions prepared in examples 1 to 5 and comparative examples 1 to 3 were drawn off from the surface of a clean silver powder by a 100 μm coater, oven-dried at 50 ℃ for 20min, taken out, left to stand at room temperature for testing:
(1) gloss was measured according to GB1743-1979(1989) paint film gloss test method.
(2) Adhesion was carried out according to GB/T1720-1979(1989) paint film adhesion test (circle method).
(3) The wear resistance is detected according to GB7T1768-2006, and the quality before and after the measurement is poor.
(4) Water resistance was carried out according to the method A of GB/T1733-1993 paint film water resistance measurement.
(5) Blocking resistance was determined according to GB1762-1980 (1989) paint film tack-free test.
(6) The glass transition temperature was measured by DSC at a temperature increase rate of 10 ℃ per minute from 10 ℃ to 100 ℃.
TABLE 1 results of the Performance test of various examples and comparative examples
Figure 888943DEST_PATH_IMAGE001
Table 1 shows the results of the performance tests of the various examples and comparative examples, and it can be seen from Table 1 that the gloss of an acrylic emulsion increases and the abrasion resistance increases with an increase in the ratio of acrylic acid to acrylamide, but the water resistance decreases because the water solubility of the emulsion increases with an increase in the water-soluble monomer and the water resistance decreases; this disadvantage can be solved by crosslinking monomers such as vinyltriethoxysilane, while improving the abrasion resistance; as the amount of the hard monomer increases, the glass transition temperature increases and the abrasion resistance also increases.
2. Odor test
Scraping film on clean gold powder and silver powder surface with 100 μm coater, placing in a volume of 1m3In the box, carry out sealing process to the box, arrange in and carry out thermal treatment for 30min under 50 ℃, open the box, carry out the peculiar smell and detect:
the acrylic emulsions prepared in examples 1-5 and comparative example 1 were free of off-notes, the acrylic emulsion prepared in comparative example 2 had a slight odor, and the acrylic emulsion prepared in comparative example 3 smelled a noticeable odor.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that, since numerous modifications and adaptations may occur to those skilled in the art without departing from the present invention, such modifications and adaptations are intended to be within the scope of the present invention.

Claims (9)

1. The high-gloss low-odor water-based acrylic emulsion is characterized by comprising the following components in parts by weight: 10 to 30 parts of soft monomer, 14 to 40 parts of hard monomer, 1 to 10 parts of acrylic acid, 0.01 to 3 parts of crosslinking monomer,
0.5-5 parts of emulsifier, 0.2-0.8 part of initiator, 0.1-0.5 part of buffering agent, 0.01-0.3 part of bactericide and 40-70 parts of deionized water;
the hard monomer is more than one of methyl methacrylate, tert-butyl methacrylate and styrene;
the soft monomer is more than one of butyl acrylate, isooctyl acrylate and ethyl acrylate;
the crosslinking monomer is more than one of acrylamide, vinyl triethoxysilane, vinyl trimethoxysilane and isobutyl triethoxysilane.
2. The acrylic emulsion of claim 1 wherein said crosslinking monomer is acrylamide.
3. The acrylic emulsion according to claim 1, wherein the emulsifier is one or more of sodium dodecyl sulfate, sodium dodecyl diphenyl oxide disulfonate, sodium (C12-C14) fatty alcohol ether sulfate, and ethoxylated alkyl sulfate.
4. The acrylic emulsion of claim 3 wherein said emulsifier is a mixture of sodium lauryl sulfate and ethoxylated alkyl sulfate.
5. The acrylic emulsion according to claim 1, wherein the initiator is one or more of sodium persulfate, ammonium persulfate, potassium persulfate, and tert-butyl hydroperoxide; the buffer is sodium bicarbonate.
6. A method of preparing a high gloss, low odor aqueous acrylic emulsion as defined in any of claims 1-5 comprising the steps of:
(1) adding part of emulsifier into water, stirring uniformly to obtain rich foam, adding soft monomer, hard monomer, acrylic acid and crosslinking monomer, and stirring for 20-30min to obtain pre-emulsion;
(2) adding an initiator into water for dissolving to obtain an initiating solution;
(3) adding the rest of emulsifier and buffer into water, stirring and heating to 80-85 ℃, adding 5-15% of pre-emulsion prepared in the step (1), stirring for 5 minutes, adding 10-20% of priming solution (2) prepared in the step (2), keeping the temperature for 20 minutes after the reaction turns blue, then dropwise adding the rest of pre-emulsion and the rest of priming solution for 3-3.5 hours at the dropwise adding reaction temperature of 82-84 ℃, continuing the heat preservation reaction at 85-86 ℃ for 1.5-2 hours after the dropwise adding is finished, removing residual monomers when the temperature is reduced to 70 ℃, reducing the temperature to below 40 ℃, adjusting the pH to 7-8 by using ammonia water, adding bactericide, and filtering to obtain the high-gloss low-odor aqueous acrylic emulsion.
7. The method according to claim 6, wherein the crosslinking monomer in step (1) is added during the second initiator addition in step (3).
8. The preparation method according to claim 6, wherein the mass ratio of the emulsifier in the step (1) to the emulsifier in the step (2) is 1-4: 1.
9. use of a high gloss, low odor aqueous acrylic emulsion as defined in any one of claims 1 to 5 in coating of metal surfaces.
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CN110066360A (en) * 2019-04-04 2019-07-30 南京瑞固聚合物有限公司 A kind of anti-after tack aqueous acrylic emulsion and its preparation method and application
CN111087546A (en) * 2019-12-24 2020-05-01 佛山市顺德区巴德富实业有限公司 Industrial water-based high-gloss light-weight anticorrosive acrylic emulsion and preparation method thereof

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CN110066360A (en) * 2019-04-04 2019-07-30 南京瑞固聚合物有限公司 A kind of anti-after tack aqueous acrylic emulsion and its preparation method and application
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CN116426184B (en) * 2023-04-27 2024-05-17 湖北工业大学 Polymer cement anti-corrosion paint based on two-dimensional inorganic material and preparation method thereof

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