CN112662215A - Waterproof coating for building and preparation method thereof - Google Patents
Waterproof coating for building and preparation method thereof Download PDFInfo
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- CN112662215A CN112662215A CN202011442923.4A CN202011442923A CN112662215A CN 112662215 A CN112662215 A CN 112662215A CN 202011442923 A CN202011442923 A CN 202011442923A CN 112662215 A CN112662215 A CN 112662215A
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Abstract
The invention provides a waterproof coating for buildings and a preparation process thereof, and relates to the technical field of building coating processing. The waterproof coating for buildings is prepared from the following raw materials: styrene-acrylic emulsion, acrylamide, nano silicon dioxide, epoxy resin, calcium carbonate, polydimethylsiloxane, methylisothiazolinone, trimethyl hexamethylene diamine, defoaming agent, leveling agent and thickening agent; the preparation method mainly comprises the following steps: auxiliary material treatment, primary mixing, secondary mixing, paint preparation and the like. The invention overcomes the defects of the prior art, effectively prevents the coating from being heated and aged while improving the waterproof effect of the waterproof coating, and prolongs the service life of the waterproof coating.
Description
Technical Field
The invention relates to the technical field of building coating processing, in particular to a waterproof coating for buildings and a preparation method thereof.
Background
The water leakage phenomenon of the building engineering in China is always common, and the water leakage rate even exceeds 80 percent. The house leakage can not only influence the beauty of the building, but also bring great inconvenience to the life of people and even cause serious economic loss. Even worse, long term leakage problems can compromise the durability of the building, greatly reducing its useful life.
In order to improve the waterproof effect of a building, a wall body is generally required to be coated with a course of waterproof coating, and an effective waterproof effect is achieved through the waterproof coating, but the service life of the waterproof effect of the general waterproof coating is shortened under a long-term external environment, particularly under the environment of illumination, rain and coastal sea wind corrosion, the waterproof performance of the general waterproof coating is gradually weakened, the expected waterproof effect is seriously influenced, and great troubles are brought to actual use.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the waterproof coating for the building and the preparation method thereof, which can effectively prevent the coating from being aged by heating and prolong the service life of the waterproof coating while improving the waterproof effect of the waterproof coating.
In order to achieve the above purpose, the technical scheme of the invention is realized by the following technical scheme:
the waterproof coating for the building is prepared from the following raw materials in parts by weight: 60-80 parts of styrene-acrylic emulsion, 4-6 parts of acrylamide, 2-4 parts of nano silicon dioxide, 10-12 parts of epoxy resin, 4-6 parts of calcium carbonate, 3-5 parts of polydimethylsiloxane, 2-3 parts of methylisothiazolinone, 1-1.6 parts of trimethylhexamethylenediamine, 3-8 parts of defoaming agent, 1-3 parts of flatting agent and 2-3 parts of thickening agent.
Preferably, the defoaming agent is a mixture of emulsified silicone oil and polyoxyethylene polyoxypropylene pentaerythritol ether in a mass ratio of 3: 1.
Preferably, the leveling agent is a PU/UV leveling agent SC-333.
Preferably, the thickener is at least one of carboxymethyl cellulose, methyl cellulose, sodium carboxymethyl cellulose, sodium alginate, polyoxyethylene and polyvinylpyrrolidone.
The preparation method of the waterproof coating for buildings comprises the following steps:
(1) auxiliary material treatment: calcining calcium carbonate in a high-temperature reaction kettle, taking out, rapidly cooling in a low-temperature environment, grinding into powder, sieving with a 40-60 mesh sieve, and uniformly mixing with nano silicon dioxide to obtain auxiliary materials for later use;
(2) preliminary material mixing: adding deionized water and methylisothiazolinone into the auxiliary materials, placing the auxiliary materials in a high-speed stirrer for rapid stirring, taking out the auxiliary materials, and drying the auxiliary materials at a low temperature to obtain a mixture A for later use;
(3) secondary material mixing: adding epoxy resin into acrylamide, placing the mixture into a high-pressure reaction kettle, carrying out high-temperature and high-pressure treatment, taking out the mixture, adding styrene-acrylic emulsion, and uniformly stirring to obtain a mixture B;
(4) preparing the coating: and mixing the mixture A and the mixture B, sequentially adding polydimethylsiloxane, a defoaming agent, a flatting agent and a thickening agent into a stirrer, boosting the pressure, stirring at a high speed, recovering to normal pressure, adding trimethylhexamethylenediamine, and continuously stirring uniformly to obtain the waterproof coating for buildings. A
Preferably, the calcination temperature in the step (1) is 300-350 ℃, the calcination time is 1-3h, and the temperature for rapid cooling in the low-temperature environment is 4 ℃ below zero to 8 ℃ below zero.
Preferably, the rotation speed of the rapid stirring in the step (2) is 3200-.
Preferably, the temperature of the high-temperature high-pressure treatment in the step (3) is 60-70 ℃, the pressure is 8-10MPa, and the treatment time is 40-50 min.
Preferably, the pressure for boosting and high-speed stirring in the step (4) is 10-12MPa, the rotating speed for stirring is 800-1000r/min, and the stirring time is 30-40 min.
Preferably, the rotation speed of adding trimethylhexamethylenediamine in the step (4) to continue stirring is 400-600r/min, and the stirring time is 30-60 min.
The invention provides a waterproof coating for buildings and a preparation method thereof, and compared with the prior art, the waterproof coating has the advantages that:
(1) according to the invention, the waterproof performance of the coating is effectively improved by adding the acrylamide, the epoxy resin, the polydimethylsiloxane and the methylisothiazolinone, so that the coating has good film forming property, and meanwhile, the drying of the coating is accelerated, and the construction is convenient.
(2) According to the invention, through the arrangement of the nano silicon dioxide, the calcium carbonate, the polydimethylsiloxane, the methylisothiazolinone and the trimethylhexamethylenediamine, the aging resistance of the coating is effectively improved, the coating is effectively prevented from cracking and falling off after long-term outdoor use, and the service life of the coating is prolonged.
(3) According to the invention, calcium carbonate is calcined and then rapidly cooled and ground, so that pores are formed on the surface of the calcined material, the calcined material is convenient to combine with nano silicon dioxide at a later stage, and meanwhile, the waterproof effect and the ageing resistance of the coating are further improved by adding acrylamide into epoxy resin for modification treatment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the waterproof coating for the building is prepared from the following raw materials in parts by weight: 60 parts of styrene-acrylic emulsion, 4 parts of acrylamide, 2 parts of nano silicon dioxide, 10 parts of epoxy resin, 4 parts of calcium carbonate, 3 parts of polydimethylsiloxane, 2 parts of methylisothiazolinone, 1 part of trimethyl hexamethylene diamine, 3 parts of defoaming agent, 3 parts of PU/UV flatting agent SC-331 parts and 2 parts of carboxymethyl cellulose.
Wherein the defoaming agent is a mixture of emulsified silicone oil and polyoxyethylene polyoxypropylene pentaerythritol ether in a mass ratio of 3: 1.
The preparation method of the waterproof coating for buildings comprises the following steps:
(1) auxiliary material treatment: calcining calcium carbonate in a high-temperature reaction kettle at the temperature of 300 ℃ for 1h, taking out, rapidly cooling at the temperature of minus 4 ℃, grinding into powder, sieving with a 40-mesh sieve, and uniformly mixing with nano-silica to obtain auxiliary materials for later use;
(2) preliminary material mixing: adding deionized water and methylisothiazolinone into the auxiliary materials, placing the auxiliary materials in a high-speed stirrer, quickly stirring the auxiliary materials for 8min at the rotating speed of 3200r/min, and then taking the auxiliary materials out of the high-speed stirrer to dry the auxiliary materials at the low temperature of 10 ℃ to obtain a mixture A for later use;
(3) secondary material mixing: adding epoxy resin into acrylamide, placing the mixture into a high-pressure reaction kettle, treating the mixture for 40min at the high temperature of 60 ℃ and the high pressure of 8MPa, taking out the mixture, adding styrene-acrylic emulsion, and uniformly stirring to obtain a mixture B;
(4) preparing the coating: and mixing the mixture A and the mixture B, sequentially adding polydimethylsiloxane, a defoaming agent, a flatting agent, a thickening agent and a stirrer, boosting the pressure to 10MPa, stirring at a high speed of 800r/min for 30min, recovering to normal pressure, adding trimethylhexamethylenediamine, and continuously stirring at a speed of 400r/min for 30min to obtain the waterproof coating for buildings.
Example 2:
the waterproof coating for the building is prepared from the following raw materials in parts by weight: 80 parts of styrene-acrylic emulsion, 6 parts of acrylamide, 4 parts of nano silicon dioxide, 12 parts of epoxy resin, 6 parts of calcium carbonate, 5 parts of polydimethylsiloxane, 3 parts of methylisothiazolinone, 1.6 parts of trimethylhexamethylenediamine, 8 parts of defoaming agent, SC-333 parts of PU/UV flatting agent and 3 parts of polyvinylpyrrolidone.
Wherein the defoaming agent is a mixture of emulsified silicone oil and polyoxyethylene polyoxypropylene pentaerythritol ether in a mass ratio of 3: 1.
The preparation method of the waterproof coating for buildings comprises the following steps:
(1) auxiliary material treatment: calcining calcium carbonate in a high-temperature reaction kettle at 350 ℃ for 3h, taking out, rapidly cooling at-8 ℃ in a low-temperature environment, grinding into powder, sieving with a 60-mesh sieve, and uniformly mixing with nano-silica to obtain auxiliary materials for later use;
(2) preliminary material mixing: adding deionized water and methylisothiazolinone into the auxiliary materials, placing the auxiliary materials in a high-speed stirrer, quickly stirring the auxiliary materials for 10min at the rotating speed of 3600r/min, taking the auxiliary materials out, and drying the auxiliary materials at a low temperature of 20 ℃ to obtain a mixture A for later use;
(3) secondary material mixing: adding epoxy resin into acrylamide, placing the mixture into a high-pressure reaction kettle, treating the mixture for 50min at a high temperature of 70 ℃ and a high pressure of 10MPa, taking out the mixture, adding styrene-acrylic emulsion, and uniformly stirring to obtain a mixture B;
(4) preparing the coating: and mixing the mixture A and the mixture B, sequentially adding polydimethylsiloxane, a defoaming agent, a flatting agent, a thickening agent and a stirrer, boosting the pressure to 12MPa, stirring at a high speed of 1000r/min for 40min, recovering to normal pressure, adding trimethylhexamethylenediamine, and continuously stirring at a speed of 600r/min for 60min to obtain the waterproof coating for buildings.
Example 3:
the waterproof coating for the building is prepared from the following raw materials in parts by weight: 70 parts of styrene-acrylic emulsion, 5 parts of acrylamide, 3 parts of nano silicon dioxide, 11 parts of epoxy resin, 5 parts of calcium carbonate, 4 parts of polydimethylsiloxane, 2.5 parts of methylisothiazolinone, 1.3 parts of trimethyl hexamethylene diamine, 6 parts of defoaming agent, SC-332 parts of PU/UV flatting agent and 2.5 parts of sodium carboxymethylcellulose.
Wherein the defoaming agent is a mixture of emulsified silicone oil and polyoxyethylene polyoxypropylene pentaerythritol ether in a mass ratio of 3: 1.
The preparation method of the waterproof coating for buildings comprises the following steps:
(1) auxiliary material treatment: calcining calcium carbonate in a high-temperature reaction kettle at the temperature of 300 ℃ for 2h, taking out, quickly cooling at the temperature of-6 ℃, grinding into powder, sieving with a 50-mesh sieve, and uniformly mixing with nano-silica to obtain auxiliary materials for later use;
(2) preliminary material mixing: adding deionized water and methylisothiazolinone into the auxiliary materials, placing the auxiliary materials in a high-speed stirrer, quickly stirring the auxiliary materials for 9min at the rotating speed of 3400r/min, taking out the auxiliary materials, and drying the auxiliary materials at a low temperature of 15 ℃ to obtain a mixture A for later use;
(3) secondary material mixing: adding epoxy resin into acrylamide, placing the mixture into a high-pressure reaction kettle, treating the mixture for 45min at a high temperature of 65 ℃ and a high pressure of 9MPa, taking out the mixture, adding styrene-acrylic emulsion, and uniformly stirring to obtain a mixture B;
(4) preparing the coating: and mixing the mixture A and the mixture B, sequentially adding polydimethylsiloxane, a defoaming agent, a flatting agent, a thickening agent and a stirrer, boosting the pressure to 11MPa, stirring at a high speed of 900r/min for 35min, recovering to normal pressure, adding trimethylhexamethylenediamine, and continuously stirring at a speed of 500r/min for 45min to obtain the waterproof coating for buildings.
Comparative example 1:
the waterproof coating for the building is prepared from the following raw materials in parts by weight: 70 parts of styrene-acrylic emulsion, 5 parts of acrylamide, 3 parts of nano silicon dioxide, 11 parts of epoxy resin, 5 parts of calcium carbonate, 4 parts of polydimethylsiloxane, 6 parts of defoaming agent, SC-332 parts of PU/UV flatting agent and 2.5 parts of sodium carboxymethylcellulose.
Wherein the defoaming agent is a mixture of emulsified silicone oil and polyoxyethylene polyoxypropylene pentaerythritol ether in a mass ratio of 3: 1.
The preparation method of the waterproof coating for buildings comprises the following steps:
(1) auxiliary material treatment: calcining calcium carbonate in a high-temperature reaction kettle at the temperature of 300 ℃ for 2h, taking out, quickly cooling at the temperature of-6 ℃, grinding into powder, sieving with a 50-mesh sieve, and uniformly mixing with nano-silica to obtain auxiliary materials for later use;
(2) preliminary material mixing: adding deionized water into the above adjuvants, rapidly stirring in a high-speed stirrer at 3400r/min for 9min, taking out, and drying at 15 deg.C at low temperature to obtain mixture A;
(3) secondary material mixing: adding epoxy resin into acrylamide, placing the mixture into a high-pressure reaction kettle, treating the mixture for 45min at a high temperature of 65 ℃ and a high pressure of 9MPa, taking out the mixture, adding styrene-acrylic emulsion, and uniformly stirring to obtain a mixture B;
(4) preparing the coating: and mixing the mixture A and the mixture B, sequentially adding polydimethylsiloxane, a defoaming agent, a flatting agent, a thickening agent and a stirrer, boosting the pressure to 11MPa, stirring at a high speed of 900r/min for 35min, recovering to normal pressure, and continuing stirring at a speed of 500r/min for 45min to obtain the waterproof coating for the building.
Comparative example 2:
the waterproof coating for the building is prepared from the following raw materials in parts by weight: 70 parts of styrene-acrylic emulsion, 3 parts of nano silicon dioxide, 11 parts of epoxy resin, 5 parts of calcium carbonate, 4 parts of polydimethylsiloxane, 2.5 parts of methylisothiazolinone, 1.3 parts of trimethylhexamethylenediamine, 6 parts of defoaming agent, 6 parts of PU/UV flatting agent SC-332 parts and 2.5 parts of sodium carboxymethylcellulose.
Wherein the defoaming agent is a mixture of emulsified silicone oil and polyoxyethylene polyoxypropylene pentaerythritol ether in a mass ratio of 3: 1.
The preparation method of the waterproof coating for buildings comprises the following steps:
(1) auxiliary material treatment: calcining calcium carbonate in a high-temperature reaction kettle at the temperature of 300 ℃ for 2h, taking out, quickly cooling at the temperature of-6 ℃, grinding into powder, sieving with a 50-mesh sieve, and uniformly mixing with nano-silica to obtain auxiliary materials for later use;
(2) preliminary material mixing: adding deionized water and methylisothiazolinone into the auxiliary materials, placing the auxiliary materials in a high-speed stirrer, quickly stirring the auxiliary materials for 9min at the rotating speed of 3400r/min, taking out the auxiliary materials, and drying the auxiliary materials at a low temperature of 15 ℃ to obtain a mixture A for later use;
(3) secondary material mixing: adding the epoxy resin into the styrene-acrylic emulsion and uniformly stirring to obtain a mixture B;
(4) preparing the coating: and mixing the mixture A and the mixture B, sequentially adding polydimethylsiloxane, a defoaming agent, a flatting agent, a thickening agent and a stirrer, boosting the pressure to 11MPa, stirring at a high speed of 900r/min for 35min, recovering to normal pressure, adding trimethylhexamethylenediamine, and continuously stirring at a speed of 500r/min for 45min to obtain the waterproof coating for buildings.
Comparative example 3:
the waterproof coating for the building is prepared from the following raw materials in parts by weight: 70 parts of styrene-acrylic emulsion, 5 parts of acrylamide, 3 parts of nano silicon dioxide, 11 parts of epoxy resin, 5 parts of calcium carbonate, 4 parts of polydimethylsiloxane, 2.5 parts of methylisothiazolinone, 1.3 parts of trimethyl hexamethylene diamine, 6 parts of defoaming agent, SC-332 parts of PU/UV flatting agent and 2.5 parts of sodium carboxymethylcellulose.
Wherein the defoaming agent is a mixture of emulsified silicone oil and polyoxyethylene polyoxypropylene pentaerythritol ether in a mass ratio of 3: 1.
The preparation method of the waterproof coating for buildings comprises the following steps:
(1) auxiliary material treatment: grinding calcium carbonate into powder, sieving with a 50-mesh sieve, and uniformly mixing with nano silicon dioxide to obtain auxiliary materials for later use;
(2) preliminary material mixing: adding deionized water and methylisothiazolinone into the auxiliary materials, placing the auxiliary materials in a high-speed stirrer, quickly stirring the auxiliary materials for 9min at the rotating speed of 3400r/min, taking out the auxiliary materials, and drying the auxiliary materials at a low temperature of 15 ℃ to obtain a mixture A for later use;
(3) secondary material mixing: adding epoxy resin into acrylamide, placing the mixture into a high-pressure reaction kettle, treating the mixture for 45min at a high temperature of 65 ℃ and a high pressure of 9MPa, taking out the mixture, adding styrene-acrylic emulsion, and uniformly stirring to obtain a mixture B;
(4) preparing the coating: and mixing the mixture A and the mixture B, sequentially adding polydimethylsiloxane, a defoaming agent, a flatting agent, a thickening agent and a stirrer, boosting the pressure to 11MPa, stirring at a high speed of 900r/min for 35min, recovering to normal pressure, adding trimethylhexamethylenediamine, and continuously stirring at a speed of 500r/min for 45min to obtain the waterproof coating for buildings.
And (3) detection:
the paints of the above examples 1 to 3 and comparative examples 1 to 3 were subjected to the performance test, and the results are shown in the following table 1, and the waterproof performance of each group of paints under different environmental properties is shown in the following table 2:
TABLE 1
TABLE 2
The above table shows that the coating prepared by the invention has excellent waterproof performance and good aging resistance.
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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The waterproof coating for the building is characterized by being prepared from the following raw materials in parts by weight: 60-80 parts of styrene-acrylic emulsion, 4-6 parts of acrylamide, 2-4 parts of nano silicon dioxide, 10-12 parts of epoxy resin, 4-6 parts of calcium carbonate, 3-5 parts of polydimethylsiloxane, 2-3 parts of methylisothiazolinone, 1-1.6 parts of trimethylhexamethylenediamine, 3-8 parts of defoaming agent, 1-3 parts of flatting agent and 2-3 parts of thickening agent.
2. The waterproof paint for buildings according to claim 1, characterized in that: the defoaming agent is a mixture of emulsified silicone oil and polyoxyethylene polyoxypropylene pentaerythritol ether in a mass ratio of 3: 1.
3. The waterproof paint for buildings according to claim 1, characterized in that: the leveling agent is a PU/UV leveling agent SC-333.
4. The waterproof paint for buildings according to claim 1, characterized in that: the thickener is at least one of carboxymethyl cellulose, methyl cellulose, sodium carboxymethyl cellulose, sodium alginate, polyoxyethylene and polyvinylpyrrolidone.
5. A method for preparing the waterproof coating material for construction as claimed in claim 1, wherein: the preparation method of the waterproof coating for buildings comprises the following steps:
(1) auxiliary material treatment: calcining calcium carbonate in a high-temperature reaction kettle, taking out, rapidly cooling in a low-temperature environment, grinding into powder, sieving with a 40-60 mesh sieve, and uniformly mixing with nano silicon dioxide to obtain auxiliary materials for later use;
(2) preliminary material mixing: adding deionized water and methylisothiazolinone into the auxiliary materials, placing the auxiliary materials in a high-speed stirrer for rapid stirring, taking out the auxiliary materials, and drying the auxiliary materials at a low temperature to obtain a mixture A for later use;
(3) secondary material mixing: adding epoxy resin into acrylamide, placing the mixture into a high-pressure reaction kettle, carrying out high-temperature and high-pressure treatment, taking out the mixture, adding styrene-acrylic emulsion, and uniformly stirring to obtain a mixture B;
(4) preparing the coating: and mixing the mixture A and the mixture B, sequentially adding polydimethylsiloxane, a defoaming agent, a flatting agent and a thickening agent into a stirrer, boosting the pressure, stirring at a high speed, recovering to normal pressure, adding trimethylhexamethylenediamine, and continuously stirring uniformly to obtain the waterproof coating for buildings.
6. The method for preparing the waterproof paint for buildings according to claim 5, characterized in that: the calcination temperature in the step (1) is 300-350 ℃, the calcination time is 1-3h, and the rapid cooling temperature in the low-temperature environment is 4-8 ℃ below zero.
7. The method for preparing the waterproof paint for buildings according to claim 5, characterized in that: the rotating speed of the rapid stirring in the step (2) is 3200-.
8. The method for preparing the waterproof paint for buildings according to claim 5, characterized in that: the temperature of the high-temperature high-pressure treatment in the step (3) is 60-70 ℃, the pressure is 8-10MPa, and the treatment time is 40-50 min.
9. The method for preparing the waterproof paint for buildings according to claim 5, characterized in that: the pressure of the pressure boosting and high-speed stirring in the step (4) is 10-12MPa, the stirring speed is 800-.
10. The method for preparing the waterproof paint for buildings according to claim 5, characterized in that: the rotating speed of adding trimethylhexamethylene diamine to continue stirring in the step (4) is 400-600r/min, and the stirring time is 30-60 min.
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