CN109233513B - Environment-friendly stone-like paint with high water resistance and preparation method thereof - Google Patents
Environment-friendly stone-like paint with high water resistance and preparation method thereof Download PDFInfo
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- 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
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Abstract
The invention discloses an environment-friendly real stone paint with high water resistance, which comprises the following raw materials: deionized water, polypropylene fiber, hydroxyethyl cellulose, modified silicone-acrylate emulsion, a film forming aid, propylene glycol, a bactericide, a defoaming agent, a polyurethane thickener, a pH regulator and sodium polystyrene sulfonate modified quartz sand. The invention also discloses a preparation method of the environment-friendly real stone paint with high water resistance. The stone-like paint prepared by the invention has excellent water resistance, effectively reduces the condition that water-soluble or hydrophilic surfactant in the emulsion is remained in the coating after the coating is formed into a film by modifying the silicone-acrylate emulsion, further effectively improves the water resistance of the coating, and simultaneously, the invention plays a role of synergy by the mutual matching of the modified silicone-acrylate emulsion and the sodium polystyrene sulfonate modified quartz sand, can effectively improve the water resistance of the coating, is energy-saving and environment-friendly, and has wide market prospect.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an environment-friendly stone-like paint with high water resistance and a preparation method thereof.
Background
Along with the improvement of the decoration requirement of people on internal and external wall coatings, the natural stone paint is increasingly popular with people due to the unique appearance and performance, and the natural stone paint which is similar to the appearance of natural stones such as granite, marble and the like is coated on a plurality of high-grade houses, courtyards and even high-rise buildings.
However, the conventional real stone paint coating becomes white after each rain, which is caused by the poor water resistance of the coating and the absorption of moisture. The formulation reason is that water-soluble or hydrophilic surfactant is required to be added in the acrylic emulsion during synthesis, and in order to increase the stability of the emulsion, the surfactant is greatly excessive by some manufacturers, so that the coating is left in a coating after film forming, and the water resistance of the coating is greatly reduced. Therefore, designing an environment-friendly real stone paint with high water resistance becomes a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide an environment-friendly stone-like paint with high water resistance and a preparation method thereof, and aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
an environment-friendly real stone paint with high water resistance comprises the following raw materials in parts by weight: 180 parts of deionized water 130-.
As a further scheme of the invention: the feed comprises the following raw materials in parts by weight: 160 portions of deionized water 140-containing materials, 0.04-0.08 portion of polypropylene fibers, 2-4 portions of hydroxyethyl cellulose, 270 portions of modified silicone-acrylic emulsion, 5-7 portions of film-forming additives, 0.8-1.2 portions of propylene glycol, 0.6-1 portion of bactericide, 0.8-1.2 portions of defoaming agent, 0.6-1 portion of polyurethane thickening agent, 1.5-2 portions of pH regulator and 675 portions of sodium polystyrene sulfonate modified quartz sand 625-containing materials.
As a still further scheme of the invention: the feed comprises the following raw materials in parts by weight: 156 parts of deionized water, 0.06 part of polypropylene fiber, 3 parts of hydroxyethyl cellulose, 260 parts of modified silicone-acrylic emulsion, 6 parts of film-forming additive, 1 part of propylene glycol, 0.8 part of bactericide, 1 part of defoaming agent, 0.8 part of polyurethane thickener, 1.8 parts of pH regulator and 655 parts of sodium polystyrene sulfonate modified quartz sand.
As a still further scheme of the invention: weighing a proper amount of silicone-acrylic emulsion, adding 0.4 thousandth of sodium dodecyl benzene sulfonate, mechanically stirring at the stirring speed of 300 plus 700r/min for 20-40min, heating to 65-75 ℃, adding butyl acrylate and 10% sodium persulfate aqueous solution, mechanically stirring at the stirring speed of 500 plus 1200r/min for 20-40min, heating to 90 ℃, preserving heat for 60-160min, cooling to room temperature, and putting into a high-shear emulsifying machine for mechanical emulsification for 40min to obtain the modified silicone-acrylic emulsion; by modifying the silicone-acrylate emulsion, the condition that a water-soluble or hydrophilic surfactant in the emulsion is left in a coating after the coating is formed into a film is effectively reduced, and the water resistance of the coating is further effectively improved.
As a still further scheme of the invention: the film-forming additive is one or a combination of more of alcohol ester dodeca, dibutyl phthalate or polyimide; the bactericide is an isothiazolinone bactericide; the defoaming agent is organic siloxane; the pH regulator is 2-amino-2-methyl-1-propanol.
As a still further scheme of the invention: weighing a proper amount of quartz sand, heating to 260 ℃ at a heating rate of 2 ℃/min, preserving heat for 2h, cooling to room temperature, grinding into powder of 40-100 meshes, adding 0.02 per thousand times of sodium polystyrene sulfonate into the powder, mechanically stirring and mixing uniformly, and then irradiating for 10-20min by using an ultraviolet lamp to obtain the sodium polystyrene sulfonate modified quartz sand; the quartz sand is modified, so that the water resistance of the coating is effectively improved; the quartz sand is broken quartz sand of gobi pebbles in Aleptai area of Xinjiang, and the quartz sand with the grain diameter of 10-40 meshes and the quartz sand with the grain diameter of 80-120 meshes respectively account for 50 percent.
The preparation method of the environment-friendly real stone paint with high water resistance comprises the following steps:
1) weighing deionized water and polypropylene fiber according to the weight parts, putting the deionized water and the polypropylene fiber into a pulping machine for pulping, then putting the deionized water and the polypropylene fiber into a dispersion machine together, adding a film-forming assistant, propylene glycol and a bactericide in sequence while stirring, uniformly mixing, and then performing ultrasonic dispersion for 20-30min to obtain a mixture A;
2) weighing the modified silicone-acrylic emulsion according to the weight parts, adding the mixture A obtained in the step 1) while stirring, slowly adding hydroxyethyl cellulose, a pH regulator, a defoaming agent and a polyurethane thickening agent in sequence after uniformly mixing, and mechanically stirring for 30-40min to obtain a mixture B;
3) putting the mixture B obtained in the step 2) into a stirrer, slowly adding the sodium polystyrene sulfonate modified quartz sand while stirring, and uniformly mixing to obtain the sodium polystyrene sulfonate modified quartz sand.
As a still further scheme of the invention: in the step 1), the ultrasonic frequency of the ultrasonic dispersion is 10-20 kHz.
As a still further scheme of the invention: in the step 2), the stirring speed of the mechanical stirring is 300-500 r/min.
The environment-friendly real stone paint with high water resistance is applied to preparation of real stone paint.
Compared with the prior art, the invention has the beneficial effects that:
the stone-like paint prepared by the invention has excellent water resistance, and the condition that water-soluble or hydrophilic surfactant in the emulsion is left in a coating after the coating is formed into a film is effectively reduced by modifying the silicone-acrylate emulsion, so that the water resistance of the coating is effectively improved; meanwhile, the modified silicone-acrylate emulsion and the sodium polystyrene sulfonate modified quartz sand are matched with each other, so that a synergistic effect is achieved, and the water resistance of the coating can be effectively improved; in addition, the invention adopts water as the solvent, thereby saving energy, protecting environment and having wide market prospect.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
An environment-friendly real stone paint with high water resistance comprises the following raw materials in parts by weight: 130 parts of deionized water, 0.02 part of polypropylene fiber, 1 part of hydroxyethyl cellulose, 220 parts of modified silicone-acrylic emulsion, 4 parts of film-forming additive, 0.4 part of propylene glycol, 0.4 part of bactericide, 0.4 part of defoaming agent, 0.4 part of polyurethane thickener, 1 part of pH regulator and 600 parts of sodium polystyrene sulfonate modified quartz sand; wherein the film-forming additive is alcohol ester twelve; the bactericide is an isothiazolinone bactericide; the defoaming agent is organic siloxane; the pH regulator is 2-amino-2-methyl-1-propanol; weighing a proper amount of silicone-acrylic emulsion, adding sodium dodecyl benzene sulfonate which is 0.4 thousandth of the weight of the silicone-acrylic emulsion into the silicone-acrylic emulsion, mechanically stirring the mixture for 30min at a stirring speed of 500r/min, heating the mixture to 70 ℃, adding butyl acrylate and a 10% sodium persulfate aqueous solution into the mixture, mechanically stirring the mixture for 30min at a stirring speed of 1000r/min, heating the mixture to 90 ℃, preserving the heat for 120min, cooling the mixture to room temperature, and putting the mixture into a high-shear emulsifying machine to mechanically emulsify the mixture for 40min to obtain the modified silicone-acrylic emulsion; by modifying the silicone-acrylate emulsion, the condition that a water-soluble or hydrophilic surfactant in the emulsion is left in a coating after the coating is formed into a film is effectively reduced, and the water resistance of the coating is further effectively improved;
weighing a proper amount of quartz sand, heating to 260 ℃ at a heating rate of 2 ℃/min, preserving heat for 2h, cooling to room temperature, grinding into 80-mesh powder, adding 0.02 per thousand times of sodium polystyrene sulfonate into the powder, mechanically stirring and uniformly mixing, and irradiating for 15min by using an ultraviolet lamp to obtain the sodium polystyrene sulfonate modified quartz sand; the quartz sand is broken quartz sand of gobi pebbles in the Aleptai area of Xinjiang, and the quartz sand with the particle size of 40 meshes and the quartz sand with the particle size of 100 meshes respectively account for 50 percent; the quartz sand is modified, so that the water resistance of the coating is effectively improved.
In the embodiment, the preparation method of the environment-friendly real stone paint with high water resistance comprises the following steps:
1) weighing deionized water and polypropylene fiber according to the weight parts, putting the deionized water and the polypropylene fiber into a pulping machine for pulping, then putting the materials into a dispersion machine together, adding a film-forming assistant, propylene glycol and a bactericide in sequence while stirring, uniformly mixing, and then carrying out ultrasonic dispersion for 24min at the ultrasonic frequency of 16kHz to obtain a mixture A;
2) weighing the modified silicone-acrylic emulsion according to the weight parts, adding the mixture A obtained in the step 1) while stirring, slowly adding hydroxyethyl cellulose, a pH regulator, a defoaming agent and a polyurethane thickening agent in sequence after uniformly mixing, and mechanically stirring at a stirring speed of 400r/min for 36min to obtain a mixture B;
3) putting the mixture B obtained in the step 2) into a stirrer, slowly adding the sodium polystyrene sulfonate modified quartz sand while stirring, and uniformly mixing to obtain the sodium polystyrene sulfonate modified quartz sand.
Example 2
An environment-friendly real stone paint with high water resistance comprises the following raw materials in parts by weight: 180 parts of deionized water, 0.09 part of polypropylene fiber, 5 parts of hydroxyethyl cellulose, 300 parts of modified silicone-acrylic emulsion, 8 parts of film-forming additive, 1.8 parts of propylene glycol, 1.6 parts of bactericide, 1.8 parts of defoaming agent, 1.5 parts of polyurethane thickening agent, 3 parts of pH regulator and 720 parts of sodium polystyrene sulfonate modified quartz sand; wherein the film-forming additive is alcohol ester twelve; the bactericide is an isothiazolinone bactericide; the defoaming agent is organic siloxane; the pH regulator is 2-amino-2-methyl-1-propanol; weighing a proper amount of silicone-acrylic emulsion, adding sodium dodecyl benzene sulfonate which is 0.4 thousandth of the weight of the silicone-acrylic emulsion into the silicone-acrylic emulsion, mechanically stirring the mixture for 30min at a stirring speed of 500r/min, heating the mixture to 70 ℃, adding butyl acrylate and a 10% sodium persulfate aqueous solution into the mixture, mechanically stirring the mixture for 30min at a stirring speed of 1000r/min, heating the mixture to 90 ℃, preserving the heat for 120min, cooling the mixture to room temperature, and putting the mixture into a high-shear emulsifying machine to mechanically emulsify the mixture for 40min to obtain the modified silicone-acrylic emulsion; by modifying the silicone-acrylate emulsion, the condition that a water-soluble or hydrophilic surfactant in the emulsion is left in a coating after the coating is formed into a film is effectively reduced, and the water resistance of the coating is further effectively improved;
weighing a proper amount of quartz sand, heating to 260 ℃ at a heating rate of 2 ℃/min, preserving heat for 2h, cooling to room temperature, grinding into 80-mesh powder, adding 0.02 per thousand times of sodium polystyrene sulfonate into the powder, mechanically stirring and uniformly mixing, and irradiating for 15min by using an ultraviolet lamp to obtain the sodium polystyrene sulfonate modified quartz sand; the quartz sand is broken quartz sand of gobi pebbles in the Aleptai area of Xinjiang, and the quartz sand with the particle size of 40 meshes and the quartz sand with the particle size of 100 meshes respectively account for 50 percent; the quartz sand is modified, so that the water resistance of the coating is effectively improved.
In the embodiment, the preparation method of the environment-friendly real stone paint with high water resistance comprises the following steps:
1) weighing deionized water and polypropylene fiber according to the weight parts, putting the deionized water and the polypropylene fiber into a pulping machine for pulping, then putting the materials into a dispersion machine together, adding a film-forming assistant, propylene glycol and a bactericide in sequence while stirring, uniformly mixing, and then carrying out ultrasonic dispersion for 24min at the ultrasonic frequency of 16kHz to obtain a mixture A;
2) weighing the modified silicone-acrylic emulsion according to the weight parts, adding the mixture A obtained in the step 1) while stirring, slowly adding hydroxyethyl cellulose, a pH regulator, a defoaming agent and a polyurethane thickening agent in sequence after uniformly mixing, and mechanically stirring at a stirring speed of 400r/min for 36min to obtain a mixture B;
3) putting the mixture B obtained in the step 2) into a stirrer, slowly adding the sodium polystyrene sulfonate modified quartz sand while stirring, and uniformly mixing to obtain the sodium polystyrene sulfonate modified quartz sand.
Example 3
An environment-friendly real stone paint with high water resistance comprises the following raw materials in parts by weight: 155 parts of deionized water, 0.055 part of polypropylene fiber, 3 parts of hydroxyethyl cellulose, 260 parts of modified silicone-acrylic emulsion, 6 parts of film-forming assistant, 1.1 parts of propylene glycol, 1 part of bactericide, 1.1 parts of defoaming agent, 0.95 part of polyurethane thickening agent, 2 parts of pH regulator and 660 parts of sodium polystyrene sulfonate modified quartz sand; wherein the film-forming additive is alcohol ester twelve; the bactericide is an isothiazolinone bactericide; the defoaming agent is organic siloxane; the pH regulator is 2-amino-2-methyl-1-propanol; weighing a proper amount of silicone-acrylic emulsion, adding sodium dodecyl benzene sulfonate which is 0.4 thousandth of the weight of the silicone-acrylic emulsion into the silicone-acrylic emulsion, mechanically stirring the mixture for 30min at a stirring speed of 500r/min, heating the mixture to 70 ℃, adding butyl acrylate and a 10% sodium persulfate aqueous solution into the mixture, mechanically stirring the mixture for 30min at a stirring speed of 1000r/min, heating the mixture to 90 ℃, preserving the heat for 120min, cooling the mixture to room temperature, and putting the mixture into a high-shear emulsifying machine to mechanically emulsify the mixture for 40min to obtain the modified silicone-acrylic emulsion; by modifying the silicone-acrylate emulsion, the condition that a water-soluble or hydrophilic surfactant in the emulsion is left in a coating after the coating is formed into a film is effectively reduced, and the water resistance of the coating is further effectively improved; weighing a proper amount of quartz sand, heating to 260 ℃ at a heating rate of 2 ℃/min, preserving heat for 2h, cooling to room temperature, grinding into 80-mesh powder, adding 0.02 per thousand times of sodium polystyrene sulfonate into the powder, mechanically stirring and uniformly mixing, and irradiating for 15min by using an ultraviolet lamp to obtain the sodium polystyrene sulfonate modified quartz sand; the quartz sand is broken quartz sand of gobi pebbles in the Aleptai area of Xinjiang, and the quartz sand with the particle size of 40 meshes and the quartz sand with the particle size of 100 meshes respectively account for 50 percent; the quartz sand is modified, so that the water resistance of the coating is effectively improved.
In the embodiment, the preparation method of the environment-friendly real stone paint with high water resistance comprises the following steps:
1) weighing deionized water and polypropylene fiber according to the weight parts, putting the deionized water and the polypropylene fiber into a pulping machine for pulping, then putting the materials into a dispersion machine together, adding a film-forming assistant, propylene glycol and a bactericide in sequence while stirring, uniformly mixing, and then carrying out ultrasonic dispersion for 24min at the ultrasonic frequency of 16kHz to obtain a mixture A;
2) weighing the modified silicone-acrylic emulsion according to the weight parts, adding the mixture A obtained in the step 1) while stirring, slowly adding hydroxyethyl cellulose, a pH regulator, a defoaming agent and a polyurethane thickening agent in sequence after uniformly mixing, and mechanically stirring at a stirring speed of 400r/min for 36min to obtain a mixture B;
3) putting the mixture B obtained in the step 2) into a stirrer, slowly adding the sodium polystyrene sulfonate modified quartz sand while stirring, and uniformly mixing to obtain the sodium polystyrene sulfonate modified quartz sand.
Example 4
An environment-friendly real stone paint with high water resistance comprises the following raw materials in parts by weight: 140 parts of deionized water, 0.04 part of polypropylene fiber, 2 parts of hydroxyethyl cellulose, 240 parts of modified silicone-acrylic emulsion, 5 parts of film-forming additive, 0.8 part of propylene glycol, 0.6 part of bactericide, 0.8 part of defoaming agent, 0.6 part of polyurethane thickening agent, 1.5 parts of pH regulator and 625 parts of sodium polystyrene sulfonate modified quartz sand; wherein the film-forming additive is alcohol ester twelve; the bactericide is an isothiazolinone bactericide; the defoaming agent is organic siloxane; the pH regulator is 2-amino-2-methyl-1-propanol; weighing a proper amount of silicone-acrylic emulsion, adding sodium dodecyl benzene sulfonate which is 0.4 thousandth of the weight of the silicone-acrylic emulsion into the silicone-acrylic emulsion, mechanically stirring the mixture for 30min at a stirring speed of 500r/min, heating the mixture to 70 ℃, adding butyl acrylate and a 10% sodium persulfate aqueous solution into the mixture, mechanically stirring the mixture for 30min at a stirring speed of 1000r/min, heating the mixture to 90 ℃, preserving the heat for 120min, cooling the mixture to room temperature, and putting the mixture into a high-shear emulsifying machine to mechanically emulsify the mixture for 40min to obtain the modified silicone-acrylic emulsion; by modifying the silicone-acrylate emulsion, the condition that a water-soluble or hydrophilic surfactant in the emulsion is left in a coating after the coating is formed into a film is effectively reduced, and the water resistance of the coating is further effectively improved;
weighing a proper amount of quartz sand, heating to 260 ℃ at a heating rate of 2 ℃/min, preserving heat for 2h, cooling to room temperature, grinding into 80-mesh powder, adding 0.02 per thousand times of sodium polystyrene sulfonate into the powder, mechanically stirring and uniformly mixing, and irradiating for 15min by using an ultraviolet lamp to obtain the sodium polystyrene sulfonate modified quartz sand; the quartz sand is broken quartz sand of gobi pebbles in the Aleptai area of Xinjiang, and the quartz sand with the particle size of 40 meshes and the quartz sand with the particle size of 100 meshes respectively account for 50 percent; the quartz sand is modified, so that the water resistance of the coating is effectively improved.
In the embodiment, the preparation method of the environment-friendly real stone paint with high water resistance comprises the following steps:
1) weighing deionized water and polypropylene fiber according to the weight parts, putting the deionized water and the polypropylene fiber into a pulping machine for pulping, then putting the materials into a dispersion machine together, adding a film-forming assistant, propylene glycol and a bactericide in sequence while stirring, uniformly mixing, and then carrying out ultrasonic dispersion for 24min at the ultrasonic frequency of 16kHz to obtain a mixture A;
2) weighing the modified silicone-acrylic emulsion according to the weight parts, adding the mixture A obtained in the step 1) while stirring, slowly adding hydroxyethyl cellulose, a pH regulator, a defoaming agent and a polyurethane thickening agent in sequence after uniformly mixing, and mechanically stirring at a stirring speed of 400r/min for 36min to obtain a mixture B;
3) putting the mixture B obtained in the step 2) into a stirrer, slowly adding the sodium polystyrene sulfonate modified quartz sand while stirring, and uniformly mixing to obtain the sodium polystyrene sulfonate modified quartz sand.
Example 5
An environment-friendly real stone paint with high water resistance comprises the following raw materials in parts by weight: 160 parts of deionized water, 0.08 part of polypropylene fiber, 4 parts of hydroxyethyl cellulose, 270 parts of modified silicone-acrylic emulsion, 7 parts of film-forming additive, 1.2 parts of propylene glycol, 1 part of bactericide, 1.2 parts of defoaming agent, 1 part of polyurethane thickener, 2 parts of pH regulator and 675 parts of sodium polystyrene sulfonate modified quartz sand; wherein the film-forming additive is alcohol ester twelve; the bactericide is an isothiazolinone bactericide; the defoaming agent is organic siloxane; the pH regulator is 2-amino-2-methyl-1-propanol; weighing a proper amount of silicone-acrylic emulsion, adding sodium dodecyl benzene sulfonate which is 0.4 thousandth of the weight of the silicone-acrylic emulsion into the silicone-acrylic emulsion, mechanically stirring the mixture for 30min at a stirring speed of 500r/min, heating the mixture to 70 ℃, adding butyl acrylate and a 10% sodium persulfate aqueous solution into the mixture, mechanically stirring the mixture for 30min at a stirring speed of 1000r/min, heating the mixture to 90 ℃, preserving the heat for 120min, cooling the mixture to room temperature, and putting the mixture into a high-shear emulsifying machine to mechanically emulsify the mixture for 40min to obtain the modified silicone-acrylic emulsion; by modifying the silicone-acrylate emulsion, the condition that a water-soluble or hydrophilic surfactant in the emulsion is left in a coating after the coating is formed into a film is effectively reduced, and the water resistance of the coating is further effectively improved;
weighing a proper amount of quartz sand, heating to 260 ℃ at a heating rate of 2 ℃/min, preserving heat for 2h, cooling to room temperature, grinding into 80-mesh powder, adding 0.02 per thousand times of sodium polystyrene sulfonate into the powder, mechanically stirring and uniformly mixing, and irradiating for 15min by using an ultraviolet lamp to obtain the sodium polystyrene sulfonate modified quartz sand; the quartz sand is broken quartz sand of gobi pebbles in the Aleptai area of Xinjiang, and the quartz sand with the particle size of 40 meshes and the quartz sand with the particle size of 100 meshes respectively account for 50 percent; the quartz sand is modified, so that the water resistance of the coating is effectively improved.
In the embodiment, the preparation method of the environment-friendly real stone paint with high water resistance comprises the following steps:
1) weighing deionized water and polypropylene fiber according to the weight parts, putting the deionized water and the polypropylene fiber into a pulping machine for pulping, then putting the materials into a dispersion machine together, adding a film-forming assistant, propylene glycol and a bactericide in sequence while stirring, uniformly mixing, and then carrying out ultrasonic dispersion for 24min at the ultrasonic frequency of 16kHz to obtain a mixture A;
2) weighing the modified silicone-acrylic emulsion according to the weight parts, adding the mixture A obtained in the step 1) while stirring, slowly adding hydroxyethyl cellulose, a pH regulator, a defoaming agent and a polyurethane thickening agent in sequence after uniformly mixing, and mechanically stirring at a stirring speed of 400r/min for 36min to obtain a mixture B;
3) putting the mixture B obtained in the step 2) into a stirrer, slowly adding the sodium polystyrene sulfonate modified quartz sand while stirring, and uniformly mixing to obtain the sodium polystyrene sulfonate modified quartz sand.
Example 6
An environment-friendly real stone paint with high water resistance comprises the following raw materials in parts by weight: .
An environment-friendly real stone paint with high water resistance comprises the following raw materials in parts by weight: 150 parts of deionized water, 0.06 part of polypropylene fiber, 3 parts of hydroxyethyl cellulose, 255 parts of modified silicone-acrylic emulsion, 6 parts of film-forming additive, 1 part of propylene glycol, 0.8 part of bactericide, 1 part of defoaming agent, 0.8 part of polyurethane thickening agent, 1.75 parts of pH regulator and 650 parts of sodium polystyrene sulfonate modified quartz sand; wherein the film-forming additive is alcohol ester twelve; the bactericide is an isothiazolinone bactericide; the defoaming agent is organic siloxane; the pH regulator is 2-amino-2-methyl-1-propanol; weighing a proper amount of silicone-acrylic emulsion, adding sodium dodecyl benzene sulfonate which is 0.4 thousandth of the weight of the silicone-acrylic emulsion into the silicone-acrylic emulsion, mechanically stirring the mixture for 30min at a stirring speed of 500r/min, heating the mixture to 70 ℃, adding butyl acrylate and a 10% sodium persulfate aqueous solution into the mixture, mechanically stirring the mixture for 30min at a stirring speed of 1000r/min, heating the mixture to 90 ℃, preserving the heat for 120min, cooling the mixture to room temperature, and putting the mixture into a high-shear emulsifying machine to mechanically emulsify the mixture for 40min to obtain the modified silicone-acrylic emulsion; by modifying the silicone-acrylate emulsion, the condition that a water-soluble or hydrophilic surfactant in the emulsion is left in a coating after the coating is formed into a film is effectively reduced, and the water resistance of the coating is further effectively improved; weighing a proper amount of quartz sand, heating to 260 ℃ at a heating rate of 2 ℃/min, preserving heat for 2h, cooling to room temperature, grinding into 80-mesh powder, adding 0.02 per thousand times of sodium polystyrene sulfonate into the powder, mechanically stirring and uniformly mixing, and irradiating for 15min by using an ultraviolet lamp to obtain the sodium polystyrene sulfonate modified quartz sand; the quartz sand is broken quartz sand of gobi pebbles in the Aleptai area of Xinjiang, and the quartz sand with the particle size of 40 meshes and the quartz sand with the particle size of 100 meshes respectively account for 50 percent; the quartz sand is modified, so that the water resistance of the coating is effectively improved.
In the embodiment, the preparation method of the environment-friendly real stone paint with high water resistance comprises the following steps:
1) weighing deionized water and polypropylene fiber according to the weight parts, putting the deionized water and the polypropylene fiber into a pulping machine for pulping, then putting the materials into a dispersion machine together, adding a film-forming assistant, propylene glycol and a bactericide in sequence while stirring, uniformly mixing, and then carrying out ultrasonic dispersion for 24min at the ultrasonic frequency of 16kHz to obtain a mixture A;
2) weighing the modified silicone-acrylic emulsion according to the weight parts, adding the mixture A obtained in the step 1) while stirring, slowly adding hydroxyethyl cellulose, a pH regulator, a defoaming agent and a polyurethane thickening agent in sequence after uniformly mixing, and mechanically stirring at a stirring speed of 400r/min for 36min to obtain a mixture B;
3) putting the mixture B obtained in the step 2) into a stirrer, slowly adding the sodium polystyrene sulfonate modified quartz sand while stirring, and uniformly mixing to obtain the sodium polystyrene sulfonate modified quartz sand.
Example 7
An environment-friendly real stone paint with high water resistance comprises the following raw materials in parts by weight: 156 parts of deionized water, 0.06 part of polypropylene fiber, 3 parts of hydroxyethyl cellulose, 260 parts of modified silicone-acrylic emulsion, 6 parts of film-forming additive, 1 part of propylene glycol, 0.8 part of bactericide, 1 part of defoaming agent, 0.8 part of polyurethane thickener, 1.8 parts of pH regulator and 655 parts of sodium polystyrene sulfonate modified quartz sand; wherein the film-forming additive is alcohol ester twelve; the bactericide is an isothiazolinone bactericide; the defoaming agent is organic siloxane; the pH regulator is 2-amino-2-methyl-1-propanol; weighing a proper amount of silicone-acrylic emulsion, adding sodium dodecyl benzene sulfonate which is 0.4 thousandth of the weight of the silicone-acrylic emulsion into the silicone-acrylic emulsion, mechanically stirring the mixture for 30min at a stirring speed of 500r/min, heating the mixture to 70 ℃, adding butyl acrylate and a 10% sodium persulfate aqueous solution into the mixture, mechanically stirring the mixture for 30min at a stirring speed of 1000r/min, heating the mixture to 90 ℃, preserving the heat for 120min, cooling the mixture to room temperature, and putting the mixture into a high-shear emulsifying machine to mechanically emulsify the mixture for 40min to obtain the modified silicone-acrylic emulsion; by modifying the silicone-acrylate emulsion, the condition that a water-soluble or hydrophilic surfactant in the emulsion is left in a coating after the coating is formed into a film is effectively reduced, and the water resistance of the coating is further effectively improved; weighing a proper amount of quartz sand, heating to 260 ℃ at a heating rate of 2 ℃/min, preserving heat for 2h, cooling to room temperature, grinding into 80-mesh powder, adding 0.02 per thousand times of sodium polystyrene sulfonate into the powder, mechanically stirring and uniformly mixing, and irradiating for 15min by using an ultraviolet lamp to obtain the sodium polystyrene sulfonate modified quartz sand; the quartz sand is broken quartz sand of gobi pebbles in the Aleptai area of Xinjiang, and the quartz sand with the particle size of 40 meshes and the quartz sand with the particle size of 100 meshes respectively account for 50 percent; the quartz sand is modified, so that the water resistance of the coating is effectively improved.
In the embodiment, the preparation method of the environment-friendly real stone paint with high water resistance comprises the following steps:
1) weighing deionized water and polypropylene fiber according to the weight parts, putting the deionized water and the polypropylene fiber into a pulping machine for pulping, then putting the materials into a dispersion machine together, adding a film-forming assistant, propylene glycol and a bactericide in sequence while stirring, uniformly mixing, and then carrying out ultrasonic dispersion for 24min at the ultrasonic frequency of 16kHz to obtain a mixture A;
2) weighing the modified silicone-acrylic emulsion according to the weight parts, adding the mixture A obtained in the step 1) while stirring, slowly adding hydroxyethyl cellulose, a pH regulator, a defoaming agent and a polyurethane thickening agent in sequence after uniformly mixing, and mechanically stirring at a stirring speed of 400r/min for 36min to obtain a mixture B;
3) putting the mixture B obtained in the step 2) into a stirrer, slowly adding the sodium polystyrene sulfonate modified quartz sand while stirring, and uniformly mixing to obtain the sodium polystyrene sulfonate modified quartz sand.
Comparative example 1
Compared with the example 7, the modified silicone-acrylate emulsion is replaced by the unmodified silicone-acrylate emulsion, and the rest is the same as the example 7.
Comparative example 2
In comparison with example 7, sodium polystyrenesulfonate modified quartz sand was replaced with unmodified quartz sand, and the rest was the same as example 7.
Comparative example 3
Compared with the example 7, the modified silicone-acrylic emulsion is replaced by unmodified silicone-acrylic emulsion, and the sodium polystyrene sulfonate modified quartz sand is replaced by unmodified quartz sand, and the rest is the same as the example 7.
Performance testing
The environment-friendly stone-like paint with high water resistance prepared in example 7 and comparative examples 1-3 was tested according to the China building industry Standard JG/T24-2000 synthetic resin emulsion Sand wall building Material, wherein the initial drying crack resistance was crack-free, the drying time (surface drying) was 4h or less, the water resistance was 96h, and the coating was free from swelling, cracking and peeling (slight color change allowed compared with the non-soaked part), and the specific test results are shown in Table 1.
As can be seen from the comparison of the data of example 7 and comparative example 1, the modified silicone-acrylic emulsion prepared by modifying the silicone-acrylic emulsion according to the invention can effectively improve the water resistance of the coating; as can be seen from the comparison of the data of example 7 and comparative example 2, the sodium polystyrene sulfonate modified quartz sand prepared by modifying quartz sand according to the present invention can effectively improve the water resistance of the coating layer.
In addition, as can be seen from the comparison of the data of the example 7 and the comparative examples 1 to 3, the invention has the synergistic effect by the cooperation of the modified silicone-acrylate emulsion and the sodium polystyrene sulfonate modified quartz sand, and can effectively improve the water resistance of the coating.
TABLE 1 test results Table
| Group of | Early dry cracking resistance | Drying time | Water resistance |
| Example 7 | Without cracks | 1.8 | 192h has no abnormal condition |
| Comparative example 1 | Without cracks | 2 | Slightly whitish at 120h |
| Comparative example 2 | Without cracks | 2.2 | 144h slight whitening |
| Comparative example 3 | Without cracks | 3 | Slightly whiten for 96h |
From the results, the real stone paint prepared by the invention has excellent water resistance, the condition that water-soluble or hydrophilic surfactant in the emulsion is left in the coating after the coating is formed into a film is effectively reduced by modifying the silicone-acrylate emulsion, and the water resistance of the coating is further effectively improved.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (7)
1. The environment-friendly real stone paint with high water resistance is characterized by comprising the following raw materials in parts by weight: 180 parts of deionized water 130-; weighing the silicone-acrylic emulsion, adding sodium dodecyl benzene sulfonate which is 0.4 thousandth of the weight of the silicone-acrylic emulsion into the silicone-acrylic emulsion, mechanically stirring the mixture for 20 to 40 minutes, heating the mixture to 65 to 75 ℃, adding aqueous solution of butyl acrylate and sodium persulfate into the mixture, mechanically stirring the mixture for 20 to 40 minutes, heating the mixture to 90 ℃, preserving the heat of the mixture, cooling the mixture to room temperature, and putting the mixture into a high-shear emulsifying machine to mechanically emulsify the mixture for 40 minutes to obtain the modified silicone-acrylic emulsion; the film-forming additive is one or a combination of more of alcohol ester dodeca, dibutyl phthalate or polyimide; the bactericide is an isothiazolinone bactericide; the defoaming agent is organic siloxane; the pH regulator is 2-amino-2-methyl-1-propanol; the preparation method of the sodium polystyrene sulfonate modified quartz sand comprises the steps of weighing quartz sand, heating to 260 ℃, preserving heat for 2 hours, cooling to room temperature, grinding into powder, adding 0.02 per thousand times of sodium polystyrene sulfonate by weight into the powder, mechanically stirring and uniformly mixing, and then irradiating for 10-20min by using an ultraviolet lamp to obtain the sodium polystyrene sulfonate modified quartz sand.
2. The environment-friendly real stone paint with high water resistance as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 160 portions of deionized water 140-containing materials, 0.04-0.08 portion of polypropylene fibers, 2-4 portions of hydroxyethyl cellulose, 270 portions of modified silicone-acrylic emulsion, 5-7 portions of film-forming additives, 0.8-1.2 portions of propylene glycol, 0.6-1 portion of bactericide, 0.8-1.2 portions of defoaming agent, 0.6-1 portion of polyurethane thickening agent, 1.5-2 portions of pH regulator and 675 portions of sodium polystyrene sulfonate modified quartz sand 625-containing materials.
3. The environment-friendly real stone paint with high water resistance as claimed in claim 2, which is characterized by comprising the following raw materials in parts by weight: 156 parts of deionized water, 0.06 part of polypropylene fiber, 3 parts of hydroxyethyl cellulose, 260 parts of modified silicone-acrylic emulsion, 6 parts of film-forming additive, 1 part of propylene glycol, 0.8 part of bactericide, 1 part of defoaming agent, 0.8 part of polyurethane thickener, 1.8 parts of pH regulator and 655 parts of sodium polystyrene sulfonate modified quartz sand.
4. A method for preparing the environment-friendly real stone paint with high water resistance according to any one of claims 1 to 3, which is characterized by comprising the following steps:
1) weighing deionized water and polypropylene fiber according to the weight parts, putting the deionized water and the polypropylene fiber into a pulping machine for pulping, then putting the deionized water and the polypropylene fiber into a dispersion machine together, adding a film-forming assistant, propylene glycol and a bactericide in sequence while stirring, uniformly mixing, and then performing ultrasonic dispersion for 20-30min to obtain a mixture A;
2) weighing the modified silicone-acrylic emulsion according to the weight parts, adding the mixture A obtained in the step 1) while stirring, slowly adding hydroxyethyl cellulose, a pH regulator, a defoaming agent and a polyurethane thickening agent in sequence after uniformly mixing, and mechanically stirring for 30-40min to obtain a mixture B;
3) putting the mixture B obtained in the step 2) into a stirrer, slowly adding the sodium polystyrene sulfonate modified quartz sand while stirring, and uniformly mixing to obtain the sodium polystyrene sulfonate modified quartz sand.
5. The method for preparing environment-friendly real stone paint with high water resistance as claimed in claim 4, wherein in the step 1), the ultrasonic frequency of the ultrasonic dispersion is 10-20 kHz.
6. The method for preparing environment-friendly stone-like paint with high water resistance as claimed in claim 4, wherein in the step 2), the stirring speed of the mechanical stirring is 300-500 r/min.
7. Use of the environment-friendly real stone paint with high water resistance as defined in any one of claims 1 to 3 in the preparation of real stone paint.
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| 核壳乳液聚合合成硅丙乳液的稳定性影响因素;王玉春等;《涂料工业》;20080131;第38卷(第1期);第37页第3和4段、第38页第1和2段、第39页第7和8段和表7 * |
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