LU102979B1

LU102979B1 - Negative ion anti-mosquito interior wall coating and preparation method thereof

Info

Publication number: LU102979B1
Application number: LU102979A
Authority: LU
Inventors: Jianfei Zhang; Baoqing Wang; Hao Liang; Wenli Zhang
Original assignee: Shandong Anran Nanometer Ind Development Co Ltd
Priority date: 2021-09-22
Filing date: 2022-07-13
Publication date: 2023-03-22
Also published as: CN113717606A; CN113717606B; NL2032423B1; NL2032423A

Abstract

The present disclosure discloses a negative ion anti-mosquito interior wall coating and a preparation method thereof. The preparation method comprises the steps of: performing ultra-refinement on powder to obtain powder F1; pre-dissolving water-soluble acrylic resin and a thickener to obtain a mixed solution H1; adding remaining water, a wetting agent, the powder F1, zeolite powder, half amount of defoamer and inorganic fungicides to the mixer, to obtain slurry J3; adding the mosquito repellent microcapsule, the silicone-acrylic emulsion, the film-forming aid, the remaining defoamer to the slurry J3, and mixing for 20 min, then adding the mixed solution H1, and uniformly mixing to obtain slurry J4; adding a pH regulator to the slurry J4, filtered, to obtain the finished product. The present disclosure has the dual functions of releasing negative ions and repelling mosquitoes, and has a good mosquito-repelling effect.

Description

NEGATIVE ION ANTI-MOSQUITO INTERIOR WALL COATING AND LU102979

PREPARATION METHOD THEREOF

TECHNICAL FIELD

[0001] The present disclosure relates to a coating for an inner side surface of a building, and particularly relates to a negative ion anti-mosquito interior wall coating capable of releasing negative ions and expelling mosquitos and a preparation method thereof.

BACKGROUND ART

[0002] As we know, the interior wall coating of a building plays a role in beautifying the building, and can effectively protect the wall and delay the adverse effects of moisture, friction, light and other external factors on the wall. With the development of coating technology, the basic compositions of interior wall coating have been basically finalized. The basic raw materials include matrix emulsion or water-based resin, calcium powder, titanium dioxide, kaolin and other pigments and fillers, dispersants, wetting agents, defoamers, pH regulators, thickening agents, leveling agents, and other aids.

[0003] With the improvement of people's living standards, higher requirements have also been put forward for the items and materials used in daily life, and interior wall coatings are no exception. In addition to the basic decorative and protective functions, coatings are also given more functions by the coating manufacturers, to meet various needs of consumers, such as thermal insulation coatings, fire retardant coatings, self-cleaning coatings, heat insulation coatings, sunscreen coatings, infrared heat dissipation coatings, etc. In addition, the coatings are gradually used to ordinary houses extending from special application environments.

[0004] Negative air ions are known as “air vitamins”. A number of studies have shown that negative ions have the advantages of refreshing air, deodorizing and resisting bacteria and enhancing immunity, etc. The health conditions of residents who live in the seaside and forests are generally better than those who live in the cities for a long time, which is associated with the higher levels of negative ions in the air in the environment. Negative ion coating is made by adding active ingredients that can generate negative ions into the coating formula, so as to realize the continuous release of negative ions and improve the indoor air environment in the normal indoor environment without additional heat, electricity, etc. The existing negative ion coatings have less negative ion release amount and have poor health care effect on humans.

[0005] Anti-mosquito is an important issue in daily households. How to repellent and prevent mosquitoes in an effective, safe and durable manner is always the demand of consumers and the direction of efforts for scientific researchers. In recent years, with the continuous research and development of technicians, the mosquito repellent microcapsule technology has gradually matured and entered the markets.

SUMMARY

1

[0006] In order to solve the above shortcomings in the prior art, the present disclosure LU102979 provides a negative ion anti-mosquito interior wall coating and a preparation method thereof. The negative ion anti-mosquito interior wall coating can efficiently release a large amount of negative ions for a long time, is capable of expelling mosquitos for a long time, has a good mosquito effect, and is healthy and environmentally friendly.

[0007] For solving the above shortcomings, the present disclosure adopts the following technical solutions:

[0008] A negative ion anti-mosquito interior wall coating is characterized by comprising the following raw materials in parts by mass: 300-600 parts of silicone-acrylic emulsion, 20-40 parts of water-soluble acrylic resin, 60-100 parts of tourmaline powder, 60-100 parts of sericite powder, 20-50 parts of germanium powder, 20-50 parts of titanium dioxide, 10- 30 parts of zeolite powder, 8-15 parts of a mosquito repellent microcapsule, 4-8 parts of a thickener, 2-4 parts of a defoamer, 2-5 parts of a wetting agent, 20-50 parts of a film-forming aid, 2-6 parts of inorganic fungicides, and 100-300 parts of water.

[0009] As a preferred embodiment, the negative ion anti-mosquito interior wall coating comprises the following raw materials in parts by weight: 500 parts of silicone-acrylic emulsion, 30 parts of water-soluble acrylic resin, 100 parts of tourmaline powder, 80 parts of sericite powder, 40 parts of germanite powder, 35 parts of titanium dioxide, 30 parts of zeolite powder, 15 parts of a mosquito repellent microcapsule, 6 parts of a thickener, 3 parts of a defoamer, 3 parts of a wetting agent, 35 parts of a film-forming aid, 4 parts of inorganic fungicides, and 200 parts of water.

[0010] Further, the present disclosure comprises 1-5 parts (by weight) of a pH regulator. The pH of a product can be adjusted to 7-8.

[0011] Further, the mosquito repellent microcapsule in the present disclosure is a slow-release microcapsule containing more than 60% by total mass of active components.

[0012] Further, the active components contained in the mosquito repellent microcapsule in the present disclosure include at least one of at least 50% of pyrethrin, a folium eucalypti extractive, a folium artemisiae argyi extractive and other natural plant extraction solutions.

[0013] The active components contained in the mosquito repellent microcapsule include at least one of deet, dimethyl phthalate, pyrethrin and other mosquito repellents.

[0014] The particle size of the zeolite powder in the present disclosure is 325-1,250 meshes.

[0015] The defoamer in the present disclosure is a mineral oil defoamer; the thickener is a polyurethane thickener; the pH regulator is AMP-95; the inorganic fungicides are nano-zinc fungicides; the mosquito repellent microcapsule can be prepared individually by selecting mosquito repellent preparations, and can also be a common mosquito repellent microcapsule available on the market, such as the mosquito repellent microcapsule produced by Anhui Microdelivery Smart Microcapsule Sci & Tech Co.,

Ltd. and a natural mosquito repellent microcapsules produced by Changzhou Meisheng

Biomaterials Co., Ltd.

[0016] A method for preparing a negative ion anti-mosquito interior wall coating is 2 characterized by comprising the following steps: LU102979

[0017] S1: performing ultra-refinement on negative ion functional powder:

[0018] Various raw materials are selected in proportion, titanium dioxide and germanite powder are added into water that dissolves 1% dispersant and has mass three times of the powder, then stirred by a mixer at a rotation speed of 500 r/min for 20 min to obtain slurry, then the slurry is transferred into a sand mill, wherein zirconium beads with a diameter of 0.4-0.6 mm are used, the bead-to-material ratio is 8: 1, the rotation speed is set to be 2,500 r/min, and the powder is ground until the powder particle size

D90 is less than 1 um, and then the grinding is completed and slurry J1 is obtained;

[0019] Tourmaline powder and sericite powder are added into water that dissolves 1% dispersant and has mass three times of the powder, then stirred by a mixer at a rotation speed of 500 r/min for 20 min, the slurry is mixed with slurry J1, and then the mixture is transferred into the sand mill for sand milling, wherein the zirconium beads with a diameter of 0.4-0.6 mm are used, the bead-to-material ratio is 8: 1, the rotation speed is set to be 2,500 r/min, and the powder is ground until the powder particle size

D90 is less than 1 um, and then the grinding is completed and slurry J2 is obtained;

[0020] The inlet air temperature of a spray dryer is set to be 200°C, after the temperature rises to 200°C, the slurry J2 is pumped into the spray dryer through a peristaltic pump, the rotation speed of the peristaltic pump is set to be 15.0 rpm, and the spray-drying is performed to obtain negative ion functional powder F1;

[0021] S2: pre-dissolving water-soluble acrylic resin and a thickener:

[0022] The thickener is dissolved in water that has mass 10 times that of the thickener, the thickener and water are uniformly mixed, then water-soluble acrylic resin is added and stirred and uniformly mixed by a mixer at a rotation speed of 300 r/min, to obtain a mixed solution H1 for future use;

[0023] S3: remaining water (water obtained after removing water for dissolving the thickener from the water selected in proportion) is added to the mixer, and a wetting agent, the negative ion functional powder F1, zeolite powder, half amount of defoamer and inorganic fungicides are sequentially added to the water in the mixer which runs at a rotation speed of 300 r/min; then the rotation speed of the mixer is increased to 1,600 r/min, to mix at a high speed for 30-45 min, so that the powder can be uniformly dispersed in water, and slurry J3 is obtained;

[0024] S4: the speed of the mixer is reduced to 500 r/min, a mosquito repellent microcapsule, silicone-acrylic emulsion, a film-forming aid, and the remaining defoamer are sequentially added to the slurry J3 and mixed for 20 min, then the mixed solution H1 is added and uniformly mixed to obtain semi-finished slurry J4;

[0025] S5: when the mixer runs at a rotation speed of 300 r/min, a pH regulator is added to the semi-finished slurry J4 to adjust the pH of the semi-finished slurry J4 to be 7-8, and then the semi-finished slurry J4 is filtered through a 200-mesh filter screen to obtain the finished product.

[0026] The dispersant used in the powder milling process is AODA water-based ceramic dispersant AD8098.

[0027] In the interior wall coating prepared by the present disclosure, tourmaline and sericite are capable of ionizing water molecules and oxygen molecules in the air so as to 3 release the negative ions. The effect is effective for a long time. Therefore, the coating LU102979 of the present disclosure can achieve the effect of continuously releasing the negative ions. Meanwhile, sericite has good sealing performance and good aging resistance, so the mechanical properties and the weather resistance of the coating layer can be improved; the germanite powder and the titanium dioxide are semiconductor materials which respectively have thermal activity and photoactivity. There are 32 electrons around germanium nucleus, and four electrons on the outermost orbit move irregularly, and once the temperature increases, one electron on the outermost orbit can de-orbit due to stimulation; similarly, the component TiO, of titanium dioxide can absorb photons under the action of ultraviolet light in natural light, thus the electron transferring capacity can be improved, and the ionization ability of tourmaline is improved.

[0028] The negative ion-release ability of tourmaline and sericite and the photoactivity and thermal activity of germanite and titanium dioxide are more excellent under an ultra-fine state, especially when the particle size reaches nano-scale. Therefore, in the present disclosure, the four powder used can be mixed and subjected to ultra-fine milling to form a micro-nano structure in which the semiconductor materials coat the tourmaline powder, thus achieving better functional synergy.

[0029] The zeolite has a microporous structure inside, which can greatly increase the specific surface area of the material, increase the contact area between the coating layer and the water and oxygen molecules in the air, promote ionization, and increase the amount of released negative ions. Meanwhile, the pore structure facilitates the distribution of the effective components of the mosquito repellent microcapsule in the coating layer, thus improving the mosquito repelling effect.

[0030] The tourmaline has permanent electrical polarity, so the surface of the tourmaline has an electric field strength of 107V/m in the range of tens of microns, which can electrolyze the water molecules, improve the (water molecule) interface activity, reduce the degree of water molecule association, and reduce the intermolecular clustering, activate the water molecules, and improve the solubility and penetration of molecules.

[0031] In the present disclosure, the improved ionization ability of the tourmaline is combined with the anti-mosquito function of the mosquito repellent capsule, and such characteristic of the tourmaline is utilized to improve the molecular activity of the water molecules in the coating layer and the active components (anti-mosquito components) in the mosquito-repellent capsule, increase the permeability and improve the release ability of the active components; and by combing with the microporous structure of the zeolite , a better mosquito repelling effect is achieved.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to facilitate the understanding of the present disclosure, the present disclosure will be further described in conjunction with the specific embodiments.

[0033] Example 1

[0034] A negative ion anti-mosquito interior wall coating comprised the following raw materials in parts by mass: 4

[0035] 300 parts silicone-acrylic emulsion, 40 parts of water-soluble acrylic resin, 80 LU102979 parts of tourmaline powder, 100 parts of sericite powder, 20 parts of germanium powder, 50 parts of titanium dioxide (Anatase), 10 parts of zeolite powder, 12 parts of mosquito repellent microcapsule, 5 parts of thickener, 2 parts of defoamer, 2 parts of wetting agent, 20 parts of film-forming aid, 2 parts of inorganic fungicides, and 120 parts of water. The mosquito repellent microcapsule was produced by Anhui Microdelivery

Smart Microcapsule Sci & Tech Co., Ltd.

[0036] A method for preparing the above negative ion anti-mosquito interior wall coating was characterized by comprising the following steps:

[0037] S1: performing ultra-refinement on negative ion functional powder:

[0038] Various raw materials were selected in proportion, 50 parts of titanium dioxide (Anatase) and 20 parts of germanite powder were added into 210 parts of water that dissolved 2.1 parts of AODA water-based ceramic dispersant AD8098, then stirred by a mixer at a rotation speed of 500 r/min for 20 min to obtain slurry, and then the slurry was transferred into a sand mill, wherein zirconium beads with a diameter of 0.4-0.6 mm were used, the bead-to-material ratio was 8: 1, the rotation speed was set to be 2,500 r/min; after grinding for 40 min, samples were taken for testing the particle size every 5 min, and the powder (titanium dioxide and germanium powder) was ground until the powder particle size D90 was less than 1 um, and then the grinding was completed and slurry J1 was obtained. 80 parts of tourmaline powder and 100 parts of sericite powder were added into 540 parts of water that dissolved 5.4 parts of AODA water-based ceramic dispersant AD8098, then stirred by a mixer at a rotation speed of 500 r/min for 20 min, the slurry was mixed with the slurry J1, and then the mixture was transferred into the sand mill for sand milling, wherein the zirconium beads with a diameter of 0.4-0.6 mm were used, the bead-to-material ratio was 8: 1, the rotation speed was set to be 2,500 r/min, after grinding for 40 min, samples were taken for testing the particle size every 5 min, and the powder (tourmaline powder and sericite powder) was ground until the powder particle size D90 was less than 1 um, then the grinding was completed, and slurry J2 was obtained. The inlet air temperature of a spray dryer was set to be 200°C, after the temperature rose to 200°C, the slurry J2 was pumped into the spray dryer through a peristaltic pump, the rotation speed of the peristaltic pump was set to be 15.0 rpm, and the spray-drying was performed to obtain negative ion functional powder F1.

[0039] S2: pre-dissolving water-soluble acrylic resin and a thickener: 5 parts of a thickener was dissolved in 50 parts of water, and mixed uniformly, then 40 parts of water-soluble acrylic resin was added and uniformly mixed by a mixer at a rotation speed of 300 r/min, to obtain a mixed solution H1 for future use;

[0040] S3: 70 parts of water was added to a material mixing barrel of the mixer, and 2 parts of a wetting agent, the negative ion functional powder F1, 10 parts of zeolite powder with particle size of 350-650 meshes, 1 part of defoamer and 2 parts of inorganic fungicides were sequentially added to the water in the material mixing barrel of the mixer which ran at a rotation speed of 300 r/min; then the rotation speed of the mixer was increased to 1,600 r/min, to mix at a high speed for 30-45 min, so that the powder (negative ion functional powder F1, zeolite powder) was uniformly dispersed in water, and slurry J3 was obtained; LU102979

[0041] S4: the speed of the mixer was reduced to 500 r/min, 12 parts of mosquito repellent microcapsule, 300 parts of silicone-acrylic emulsion, 20 parts of a film-forming aid, and 1 part of the defoamer were sequentially added to the slurry J3 in the mixer and mixed for 20 min, then the mixed solution H1 was added to the mixer and uniformly mixed to obtain semi-finished slurry J4;

[0042] S5: when the mixer ran at a rotation speed of 300 r/min, 1 part of AMP-9 was added to the semi-finished slurry J4 in the mixer to adjust the pH of the semi-finished slurry J4 to be 7-8, to ensure the system stability; and then the semi-finished slurry J4 was filtered through a 200-mesh filter screen and packaged, to obtain the finished product.

[0043] Example 2

[0044] A negative ion anti-mosquito interior wall coating comprised the following raw materials in parts by mass:

[0045] 500 parts silicone-acrylic emulsion, 30 parts of water-soluble acrylic resin, 100 parts of tourmaline powder, 80 parts of sericite powder, 40 parts of germanium powder, 35 parts of titanium dioxide (Anatase), 30 parts of zeolite powder, 15 parts of mosquito repellent microcapsule, 6 parts of thickener, 3 parts of defoamer, 3 parts of wetting agent, 35 parts of film-forming aid, 4 parts of inorganic fungicides, and 200 parts of water. The mosquito repellent microcapsule was a slow-release microcapsule containing 85% by total mass of active components; and the active components contained in the mosquito repellent microcapsule included 60% of pyrethrin, 20% of folium eucalypti extractive, and 20% of folium artemisiae argyi extractive.

[0046] A method for preparing the above negative ion anti-mosquito interior wall coating was characterized by comprising the following steps:

[0047] S1: performing ultra-refinement on negative ion functional powder:

[0048] Various raw materials were selected in proportion, 35 parts of titanium dioxide (Anatase) and 40 parts of germanite powder were added into 225 parts of water that dissolved 2.25 parts of AODA water-based ceramic dispersant AD8098, then stirred by a mixer at a rotation speed of 500 r/min for 20 min to obtain slurry, and then the slurry was transferred into a sand mill, wherein zirconium beads with a diameter of 0.4-0.6 mm were used, the bead-to-material ratio was 8: 1, the rotation speed was set to be 2,500 r/min; after grinding for 40 min, samples were taken for testing the particle size every 5 min, and the powder (titanium dioxide and germanium powder) was ground until the powder particle size D90 was less than 1 um, and then the grinding was completed and slurry J1 was obtained. 100 parts of tourmaline powder and 80 parts of sericite powder were added into 540 parts of water that dissolved 5.4 parts of AODA water-based ceramic dispersant AD8098, then stirred by a mixer at a rotation speed of 500 r/min for 20 min, the slurry was mixed with the slurry J1, and then the mixture was transferred into the sand mill for sand milling, wherein the zirconium beads with a diameter of 0.4-0.6 mm were used, the bead-to-material ratio was 8: 1, the rotation speed was set to be 2,500 r/min, after grinding for 40 min, samples were taken for testing the particle size every 5 min, and the powder (tourmaline powder and sericite powder) was ground until the powder particle size D90 was less than 1 um, then the 6 grinding was completed, and slurry J2 was obtained. The inlet air temperature of a spray LU102979 dryer was set to be 200°C, after the temperature rose to 200°C, the slurry J2 was pumped into the spray dryer through a peristaltic pump, the rotation speed of the peristaltic pump was set to be 15.0 rpm, and the spray-drying was performed to obtain negative ion functional powder F1.

[0049] S2: pre-dissolving water-soluble acrylic resin and a thickener: 6 parts of a thickener was dissolved in 60 parts of water, and mixed uniformly, then 30 parts of water-soluble acrylic resin was added and uniformly mixed by a mixer at a rotation speed of 300 r/min, to obtain a mixed solution H1 for future use;

[0050] S3: 140 parts of water was added to a material mixing barrel of the mixer, and 3 parts of a wetting agent, the negative ion functional powder F1, 30 parts of zeolite powder with particle size of 500-800 meshes, 1.5 parts of defoamer and 4 parts of inorganic fungicides were sequentially added to the water in the material mixing barrel of the mixer which ran at a rotation speed of 300 r/min; then the rotation speed of the mixer was increased to 1,600 r/min, to mix at a high speed for 30-45 min, so that the powder (negative ion functional powder F1, zeolite powder) was uniformly dispersed in water, and slurry J3 was obtained;

[0051] S4: the speed of the mixer was reduced to 500 r/min, 15 parts of mosquito repellent microcapsule, 500 parts of silicone-acrylic emulsion, 35 parts of a film-forming aid, and 1.5 parts of the defoamer were sequentially added to the slurry J3 in the mixer and mixed for 20 min, then the mixed solution H1 was added to the mixer and uniformly mixed to obtain semi-finished slurry J4;

[0052] S5: when the mixer ran at a rotation speed of 300 r/min, 2 parts of AMP-95 were added to the semi-finished slurry J4 in the mixer to adjust the pH of the semi-finished slurry J4 to be 7-8, to ensure the system stability, and then the semi-finished slurry J4 was filtered through a 200-mesh filter screen and packaged, to obtain the finished product.

[0053] Example 3

[0054] A negative ion anti-mosquito interior wall coating comprised the following raw materials in parts by mass:

[0055] 600 parts silicone-acrylic emulsion, 20 parts of water-soluble acrylic resin, 60 parts of tourmaline powder, 60 parts of sericite powder, 30 parts of germanium powder, parts of titanium dioxide (Anatase), 20 parts of zeolite powder, 8 parts of mosquito repellent microcapsule, 8 parts of thickener, 4 parts of defoamer, 4 parts of wetting agent, 40 parts of film-forming aid, 5 parts of inorganic fungicides, and 160 parts of water. The mosquito repellent microcapsule was produced by Anhui Microdelivery

Smart Microcapsule Sci & Tech Co., Ltd.

[0056] A method for preparing the above negative ion anti-mosquito interior wall coating was characterized by comprising the following steps:

[0057] S1: performing ultra-refinement on negative ion functional powder:

[0058] Various raw materials were selected in proportion, 20 parts of titanium dioxide (Anatase) and 30 parts of germanite powder were added into 150 parts of water that dissolved 1.5 parts of AODA water-based ceramic dispersant AD8098, then stirred by a mixer at a rotation speed of 500 r/min for 20 min to obtain slurry, and then the 7 slurry was transferred into a sand mill, wherein zirconium beads with a diameter of LU102979 0.4-0.6 mm were used, the bead-to-material ratio was 8: 1, the rotation speed was set to be 2,500 r/min; after grinding for 40 min, samples were taken for testing the particle size every 5 min, and the powder (titanium dioxide and germanium powder) was ground until the powder particle size D90 was less than 1 um, and then the grinding was completed and slurry J1 was obtained. 60 parts of tourmaline powder and 60 parts of sericite powder were added into 360 parts of water that dissolved 3.6 parts of AODA water-based ceramic dispersant AD8098, then stirred by a mixer at a rotation speed of 500 r/min for 20 min, the slurry was mixed with the slurry J1, and then the mixture was transferred into the sand mill for sand milling, wherein the zirconium beads with a diameter of 0.4-0.6 mm were used, the bead-to-material ratio was 8: 1, the rotation speed was set to be 2,500 r/min, after grinding for 40 min, samples were taken for testing the particle size every 5 min, and the powder (tourmaline powder and sericite powder) was ground until the powder particle size D90 was less than 1 um, then the grinding was completed, and slurry J2 was obtained. The inlet air temperature of a spray dryer was set to be 200°C, after the temperature rose to 200°C, the slurry J2 was pumped into the spray dryer through a peristaltic pump, the rotation speed of the peristaltic pump was set to be 15.0 rpm, and the spray-drying was performed to obtain negative ion functional powder F1.

[0059] S2: pre-dissolving water-soluble acrylic resin and a thickener: 8 parts of a thickener was dissolved in 80 parts of water, and mixed uniformly, then 20 parts of water-soluble acrylic resin was added and uniformly mixed by a mixer at a rotation speed of 300 r/min, to obtain a mixed solution H1 for future use;

[0060] S3: 80 parts of water was added to a material mixing barrel of the mixer, and 4 parts of a wetting agent, the negative ion functional powder F1, 20 parts of zeolite powder with particle size of 850-1,150 meshes, 2 parts of defoamer and 5 parts of inorganic fungicides were sequentially added to the water in the material mixing barrel of the mixer which ran at a rotation speed of 300 r/min; then the rotation speed of the mixer was increased to 1,600 r/min, to mix at a high speed for 30-45 min, so that the powder (negative ion functional powder F1, zeolite powder) was uniformly dispersed in water, and slurry J3 was obtained;

[0061] S4: the speed of the mixer was reduced to 500 r/min, 8 parts of mosquito repellent microcapsule, 600 parts of silicone-acrylic emulsion, 40 parts of a film-forming aid, and 2 parts of the defoamer were sequentially added to the slurry J3 in the mixer and mixed for 20 min, then the mixed solution H1 was added to the mixer and uniformly mixed to obtain semi-finished slurry J4;

[0062] S5: when the mixer ran at a rotation speed of 300 r/min, 3 parts of AMP-95 were added to the semi-finished slurry J4 in the mixer to adjust the pH of the semi-finished slurry J4 to be 7-8, to ensure the system stability, and then the semi-finished slurry J4 was filtered through a 200-mesh filter screen and packaged, to obtain the finished product.

[0063] Comparative Example 1

[0064] The formula components, content and preparation method in this comparative example were the same as those in Example 1 except that germanium powder and 8 titanium dioxide were replaced with heavy calcium powder of the same mass. LU102979

[0065] Comparative Example 2

[0066] The formula components, content and preparation method in this comparative example were the same as those in Example 1 except that germanium powder was replaced with heavy calcium powder of the same mass.

[0067] Comparative Example 3

[0068] The formula components, content and preparation method in this comparative example were the same as those in Example 1 except that titanium dioxide was replaced with heavy calcium powder of the same mass.

[0069] Comparative Example 4

[0070] The formula components, content and preparation method in this comparative example were the same as those in Example 1 except that tourmaline powder, germanium powder and titanium dioxide were replaced with heavy calcium powder of the same mass.

[0071] Comparative Example 5

[0072] The formula components, content and preparation method in this comparative example were the same as those in Example 1 except that zeolite powder was replaced with heavy calcium powder of the same mass.

[0073] Comparative Example 6

[0074] The formula components, content and preparation method in this comparative example were the same as those in Example 1 except that mosquito repellent capsule was replaced with heavy calcium powder of the same mass.

[0075] 300 g of the negative ion anti-mosquito interior wall coating obtained in

Examples 1 to 3 and Comparative Examples 1 to 6 was evenly coated on a 50 cm*50 cm asbestos board, and allowed to dry naturally in a ventilated and shaded place for 7 days, to make an asbestos board for testing.

[0076] The asbestos board for testing was placed in a 100 cm*100 cm*100 cm glass experimental chamber which was placed in a sunlight shining place, with the air humidity in the cabin at 60-65% and the temperature at 23-25 °C. The negative ion release efficiency test of the coating was conducted, 24 hours later, an AIC-1000 negative ion detector was used to test the amount of released negative ions. In 10 cm away from the coating in the experimental chamber, the released negative ions were counted every 2 min, and the average value of 10 counts was rounded up as the amount of negative ions released from the coating, and compared in parallel.

[0077] The asbestos boards for testing were placed horizontally in the center of the bottom of a 100 cm*100 cm*100 cm glass experimental chamber. The experimental chamber was placed in a sunlight shining place, and the air humidity was kept at 60-65% and the temperature was kept at 23-25 °C in the chamber. On five sides (upper, front, back, left, right), square holes with a size of 10 cm*10 cm were formed, and 8 mosquito-sticking papers were pasted on the interior wall of the experimental chamber.

The experimental chamber was evenly arranged in a chamber of 5 m*5 m*2 m (length, width and height were 5m, 5m, and 2m, respectively) where green plants were planted, and 200 mosquitoes were placed in the chamber, 48 h and 96 h later, the number of mosquitoes on the mosquito-sticking papers counted respectively. 9

[0078] The test results of various examples and comparative examples were as LU102979 follows.

Count of Number of Number of

Serial No. released mosquitoes on mosquitoes on — | negative the the ions (fem?) | mosquito-sticking | mosquito-sticking papers (n) papers (n)

Example 2 | 80 | 0 | 1

Example 1 |: —+Æ|———|—————

Comparative

Comparative (rage | —80 | | 60

Comparative

Example 6 | —|——|——

[0079] According to the above comparative examples and examples, the negative ion anti-mosquito interior wall coating of the present disclosure could release 600 negative ions/ cm*, which could effectively improve the indoor environment. Most of mosquitoes acted outside the small experimental chamber. The present disclosure had a good mosquito repellent effect.

[0080] By comparing the data in Example 1 with those in Comparative Example 1, it showed that the germanium powder and TiO: could effectively stimulate the ability of tourmaline to release negative ions. By combining the data in Comparative Example 2 and Comparative Example 3, their excitation capabilities had a synergistic effect and were more effective than single-component excitation;

[0081] By comparing the data in Example 1 with those in Comparative Example 1 and Comparative Example 4, it showed that the permanent electrodes of tourmaline could activate the molecular activity of the active components contained in the mosquito repellent microcapsule while electrolyzing the surrounding water molecules to form negative ions, so as to achieve better mosquito repellent effect;

[0082] By comparing the data in Example 1 with those in Comparative Example 5, it showed that the addition of the zeolite powder introduced a micro-channel structure, which increased the surface area of the coating, increased the contact probability between tourmaline and water molecules, and enhanced the amount of released negative ions. At the same time, the micro-channel structure made it easier for the active components contained in the mosquito repellent microcapsule inside the coating to migrate to the coating surface, which improved the mosquito repellent effect of the coating. LU102979

[0083] In the present disclosure, the natural ore raw materials that are safe and free of toxic and side effects are used as permanent negative ion release sources, and their functions are enhanced by germanite (the atomic arrangement in germanium crystal same as diamond, hard and brittle, and stable chemical properties of germanium) and titanium dioxide. Meanwhile, through the microcapsule slow-release technology, the mosquito repellent function is added to the coating formula, and through building a micro-channel structure inside the coating by the zeolite, the effective release of negative ions and mosquito repellent components inside the coating can be achieved, thus negative ions can be released for a long time under natural light and heat conditions without additional energy, creating an indoor air environment similar to forests and seasides. Meanwhile, the mechanical properties of the wall meet the standards and the interior wall coating has the excellent effect of repelling mosquitoes. Compared with the common negative ion coating, the present disclosure does not contain risk components with high radioactivity; furthermore, compared with rare earth compounds, the activation components are inexpensive and easily available, with a broad application basis. Mosquito repellent components are wrapped in microcapsules and combined with the structure of micro-channel release, which not only ensures the long-term efficacy of mosquito repellent function, but also ensures the efficient release of internal components. In addition, the micro-electrode structure of tourmaline can activate the molecular activity of effective active components inside the mosquito repellent microcapsule, improve the permeability and diffusivity and improve the effect.

[0084] The foregoing description merely describes the embodiments of the present disclosure, but the present disclosure is not limited to these embodiments. Any and all changes or improvements that are directly derived or associated by those skilled in the art without departing from the spirit and concept of the present disclosure shall fall within the scope of protection of the present disclosure. 11

Claims

WHAT IS CLAIMED IS: LU102979

1. A negative ion anti-mosquito interior wall coating, comprising the following raw materials in parts by mass: 300-600 parts of silicone-acrylic emulsion, 20-40 parts of water-soluble acrylic resin, 60-100 parts of tourmaline powder, 60-100 parts of sericite powder, 20-50 parts of germanium powder, 20-50 parts of titanium dioxide, 10- 30 parts of zeolite powder, 8-15 parts of a mosquito repellent microcapsule, 4-8 parts of a thickener, 2-4 parts of a defoamer, 2-5 parts of a wetting agent, 20-50 parts of a film-forming aid, 2-6 parts of inorganic fungicides, and 100-300 parts of water.

2. The negative ion anti-mosquito interior wall coating according to claim 1, comprising the following raw materials in parts by mass: 500 parts of silicone-acrylic emulsion, 30 parts of water-soluble acrylic resin, 100 parts of tourmaline powder, 80 parts of sericite powder, 40 parts of germanite powder, 35 parts of titanium dioxide, 30 parts of zeolite powder, 15 parts of a mosquito repellent microcapsule, 6 parts of a thickener, 3 parts of a defoamer, 3 parts of a wetting agent, 35 parts of a film-forming aid, 4 parts of inorganic fungicides, and 200 parts of water.

3. The negative ion anti-mosquito interior wall coating according to claim 1, wherein the particle size of the zeolite powder is 325-1,250 meshes.

4. The negative ion anti-mosquito interior wall coating according to claim 1 or 2, wherein the mosquito repellent microcapsule is a slow-release microcapsule containing more than 60% by total mass of active components.

5. The negative ion anti-mosquito interior wall coating according to claim 1 or 2 comprises a pH regulator.

6. The negative ion anti-mosquito interior wall coating according to claim 4, wherein the active components contained in the mosquito repellent microcapsule include at least one of deet, dimethyl phthalate, pyrethrin and other mosquito repellents.

7. The negative ion anti-mosquito interior wall coating according to claim 4, wherein the active components contained in the mosquito repellent microcapsule include at least one of at least 50% of azadirachtin, pyrethrin, citronella oil, a folium eucalypti extractive, a folium artemisiae argyi extractive and other natural plant extraction solutions.

8. A method for preparing the negative ion anti-mosquito interior wall coating, comprising the following steps: S1: performing ultra-refinement on negative ion functional powder: Various raw materials are selected in proportion, titanium dioxide and germanite powder are added into water that dissolves 1% dispersant and has mass three times of the powder, the water is stirred by a mixer at a rotation speed of 500 r/min for 20 min to obtain slurry, then the slurry is transferred into a sand mill, wherein zirconium beads with a diameter of 0.4-0.6 mm is used, the bead-to-material ratio is 8: 1, the rotation speed is set to be 2,500 r/min, and the powder is milled until the powder particle size D90 is less than 1 um, and then the milling is completed and slurry J1 is obtained; Tourmaline powder and sericite powder are added into water that dissolves 1% dispersant and has mass three times of the powder, the water is stirred by the mixer at a rotation speed of 500 r/min for 20 min, the slurry is mixed with slurry J1, and then the 12 mixture is transferred into the sand mill for sand milling, wherein the zirconium beads LU102979 with a diameter of 0.4-0.6 mm are used, the bead-to-material ratio is 8: 1, the rotation speed is set to be 2,500 r/min, and the powder is milled until the powder particle size

D90 is less than 1 um, and then the milling is completed and slurry J2 is obtained;

The inlet air temperature of a spray dryer is set to be 200°C, after the temperature rises to 200°C, the slurry J2 is pumped into the spray dryer through a peristaltic pump, the rotation speed of the peristaltic pump is set to be 15.0 rpm, and the spraying drying is performed to obtain negative ion functional powder F1;

S2: pre-dissolving water-soluble acrylic resin and a thickener:

The thickener is dissolved in water that has mass 10 times that of the thickener, the thickener and water are uniformly mixed, then water-soluble acrylic resin is added and stirred and uniformly mixed by a mixer at a rotation speed of 300 r/min, to obtain a mixed solution H1 for future use;

S3: remaining water (water obtained after removing water for dissolving the thickener from the water selected in proportion) is added to the mixer, and a wetting agent, the negative ion functional powder F1, zeolite powder, half amount of defoamer and inorganic fungicides are sequentially added to the water in the mixer which runs at a rotation speed of 300 r/min; then the rotation speed of the mixer is increased to 1,600 r/min, to mix at a high speed for 30-45 min, so that the powder can be uniformly dispersed in water, and slurry J3 is obtained;

S4: the speed of the mixer is reduced to 500 r/min, a mosquito repellent microcapsule, silicone-acrylic emulsion, a film-forming aid, and the remaining defoamer are sequentially added to the slurry J3 and mixed for 20 min, then the mixed solution H1 is added and uniformly mixed to obtain semi-finished slurry J4;

S5: when the mixer runs at a rotation speed of 300 r/min, a pH regulator is added to the semi-finished slurry J4 to adjust the pH of the semi-finished slurry J4 to be 7-8, and then the semi-finished slurry J4 is filtered through a 200-mesh filter to obtain the finished product.

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