CN111303697A - Conductive dehumidifying sound-insulating flame-retardant sound-insulating coating and manufacturing method thereof - Google Patents

Abstract

The invention discloses a conductive dehumidifying sound-insulating flame-retardant sound-insulating coating and a manufacturing method thereof, wherein the sound-insulating coating comprises a substrate and a functional filler, wherein the substrate is a silicon-based resin substrate prepared by taking starch grafted sodium acrylate and an ethylene-vinyl acetate copolymer as raw materials, the functional filler is a conductive resonance particle with a three-layer structure, the conductive resonance particle is prepared by taking ethyl orthosilicate, saturated ammonia water, glass micro powder with the particle size of 2000 meshes-4000 meshes, tin chloride dihydrate, antimony chloride, citric acid powder and sodium bicarbonate powder as raw materials, and the conductive resonance particle has the particle size of 500 meshes-800 meshes, and the three-layer structure is specifically a glass micro powder, an active silicon dioxide substrate layer and an antimony-doped tin oxide outer film coating layer from inside to outside. The invention has the advantages of high temperature resistance, self-conduction, surface water resistance, sound insulation and shock absorption.

Description

Conductive dehumidifying sound-insulating flame-retardant sound-insulating coating and manufacturing method thereof

Technical Field

The invention relates to the technical field of coatings, in particular to a conductive dehumidifying sound-insulating flame-retardant sound-insulating coating and a manufacturing method thereof.

Background

The ethylene-vinyl acetate copolymer is a general high molecular polymer, and is called EVA for short, the molecular formula is (C2H4) x. (C4H6O2) y, and the melting point is 99 ℃. It has the following components: water resistance: the closed foam structure has no water absorption, moisture resistance and good water resistance. Corrosion resistance: it is resistant to corrosion of chemicals such as seawater, grease, acid and alkali, and has antibacterial, nontoxic, odorless and no pollution. Processability: no joint, and easy processing such as hot pressing, cutting, gluing, laminating, etc. Vibration prevention: high rebound resilience and tensile strength, high toughness and good shock resistance and buffering performance. Heat preservation: excellent heat insulation, heat preservation, cold protection and low temperature performance, and can resist severe cold and solarization. Sound insulation: the sealed foam hole has good sound insulation effect. Therefore, the material is obviously suitable for being used as an exterior wall coating of a building, but the material is not applied to the exterior wall coating of a warehouse for storing inflammable and explosive articles in the prior art.

As an exterior wall coating for a warehouse for storing flammable and explosive articles, the performance index of the exterior wall coating inevitably requires flame retardance and shock resistance, but in fact, the exterior wall coating is better to have rain water resistance (preventing the warehouse articles from being wet and prolonging the quality guarantee period), heat insulation (improving the safety in high-temperature weather), sound insulation (reducing external mechanical energy and reducing the explosion triggering risk), static resistance (preventing electrostatic discharge from being ignited and exploded), and unfortunately, the prior art does not have a coating with a corresponding function.

Therefore, a conductive dehumidifying sound-insulating flame-retardant sound-insulating coating which is high-temperature resistant, self-conductive, surface water-resistant, sound-insulating and shock-absorbing and a manufacturing method thereof are urgently needed in the market.

Disclosure of Invention

The invention aims to provide a method for manufacturing a conductive dehumidifying sound-insulating flame-retardant sound-insulating coating which has the advantages of high temperature resistance, self-conductivity, surface water resistance, sound insulation and shock absorption.

In order to achieve the purpose, the invention adopts the following technical scheme: the conductive dehumidifying sound-insulating flame-retardant sound-insulating coating comprises a substrate and a functional filler, wherein the substrate is a silicon-based resin substrate prepared by taking 3-5 parts by weight of starch grafted sodium acrylate and 60-65 parts by weight of ethylene-vinyl acetate copolymer as raw materials, the functional filler is a three-layer conductive resonance particle which is prepared by taking 2-2.5 parts by weight of ethyl orthosilicate, 4.5-5 parts by weight of saturated ammonia water, 8-10 parts by weight of 2000-4000 mesh glass micropowder, 6-8 parts by weight of tin chloride dihydrate, 0.9-1.2 parts by weight of antimony chloride, 0.05-0.06 part by weight of citric acid powder and 0.05-0.06 part by weight of sodium bicarbonate powder as raw materials and has a particle size of 500-800 meshes, and a substrate layer of the three-layer structure is specifically glass micropowder, active silicon dioxide, And an outer antimony-doped tin oxide coating layer.

A manufacturing method of a conductive dehumidifying sound-insulating flame-retardant sound-insulating coating comprises the following steps:

1) raw material preparation

① preparing raw materials, namely preparing 60 to 65 parts of ethylene-vinyl acetate copolymer, 2 to 2.5 parts of ethyl orthosilicate, 4.5 to 5 parts of saturated ammonia water, 8 to 10 parts of glass micro powder with the granularity of 2000 to 4000 meshes, 3 to 5 parts of starch grafted sodium acrylate, 6 to 8 parts of tin chloride dihydrate, 0.9 to 1.2 parts of antimony chloride, 0.05 to 0.06 part of citric acid powder and 0.05 to 0.06 part of sodium bicarbonate powder according to the parts by weight;

② preparing adjuvant materials by preparing enough ethanol;

2) substrate preparation

① placing the ethylene-vinyl acetate copolymer prepared in step ① of stage 1) in a vacuum box, heating to 40-45 ℃, and drying for 2h to obtain a matrix material;

②, mixing and uniformly stirring the matrix material obtained in the step ① and the starch grafted sodium acrylate prepared in the step ① in the stage 1), then carrying out twin-screw banburying, and banburying in advance for 8-10 min at the rotating speed of 45-50 rpm/min and the temperature of 78-83 ℃ to obtain a mixed homogeneous colloid, wherein the mixed homogeneous colloid is the required matrix;

3) functional filler preparation

① dissolving ethyl orthosilicate prepared in stage 1) stage ① in ethanol prepared in stage 1) stage ② to dissolve completely, standing for 12-15 min to obtain solution A;

②, stirring the solution A obtained in the step ① at a speed of 80-100 rpm/min, uniformly and slowly and completely dripping all the saturated ammonia water prepared in the step ① in the stage 1) within a time range of 35-40 min while stirring, continuing stirring for 5-8 min after dripping is finished, and then standing and sealing for 2-3 days to obtain a sol solution B;

③, completely putting the glass micropowder prepared in step ① of stage 1) into the sol solution B obtained in step ②, uniformly stirring, heating the mixed solution to 260-270 ℃ until the content is completely dried into a cake, then heating to 520-530 ℃, keeping for 60-80 min, air cooling to room temperature to obtain a treated dry solid, and ball-milling the obtained dry solid to 800-1000 meshes to obtain particles C;

④ completely dissolving the tin chloride dihydrate prepared in the step ① in the step 1) into 80-85 parts by weight of ethanol prepared in the step ②, stirring and heating to 72-78 ℃ at the speed of 80-100 rpm/min in a closed environment, preserving heat for 2-2.5 h, removing the seal, continuing preserving heat until the total weight of the solution is 48-50 parts by weight, then cooling to room temperature, and standing for 8-10 h after cooling to obtain a sol solution D;

⑤ completely dissolving 18-20 parts by weight of antimony chloride prepared in step ① in 18-20 parts by weight of ethanol prepared in step ② in stage 1), stirring and heating to 72-78 ℃ at the speed of 80-100 rpm/min in a closed environment, and preserving heat for 2-2.5 h to obtain sol solution E;

⑥ mixing the particles C obtained in step ③, the sol solution D obtained in step ④ and the sol solution E obtained in step ⑤, stirring them thoroughly until they are uniform, heating the mixture to 520-530 deg.C after it is completely dried, keeping the temperature for 1.5-2 h to obtain a composite dried substance, ball-milling the obtained composite dried substance to 500-800 meshes to obtain particles, mixing the particles with the citric acid powder prepared in step ① in step 1) to obtain the required functional filler

4) Conductive dehumidifying sound-proof flame-retardant sound-proof paint forming

①, adding the functional filler obtained in the step ⑥ in the stage 3) into the base body which is still in the banburying process and obtained in the step ② in the stage 2), continuously preserving the heat for 5min to 8min, and uniformly stirring while preserving the heat until the banburying is finished to obtain a prefabricated coating;

② brushing the prefabricated paint obtained in step ① on the inner wall surface of a warehouse of flammable and explosive materials, brushing the prefabricated paint with the thickness of 8mm-10mm, and cooling to obtain the required sound insulation paint.

Compared with the prior art, the invention has the following advantages: (1) the matrix material used by the invention is ethylene-vinyl acetate copolymer, and has good comprehensive properties of water resistance, corrosion resistance, vibration resistance, heat preservation, heat insulation, sound insulation and the like, so the basic performance of the invention is excellent. (2) All the materials adopted by the invention are high temperature resistant, and because resin and other additive materials which are not high temperature resistant and ultraviolet are not adopted, and no filler which is not heat resistant is adopted, the composite material has good heat resistance and heat insulation performance, the application range of the composite material is expanded, and the surface protection difficulty is reduced. (3) The invention is a very miscellaneous integral, and has the functions of static resistance, heat insulation, sound insulation and shock absorption, and the comprehensive protection performance is excellent. (4) The antistatic function of the invention is realized by the combined action of starch grafted sodium acrylate and sodium salt generated by absorbing moisture in the starch grafted sodium acrylate, adding special conductive coating and reacting citric acid with sodium bicarbonate, and the antistatic performance and the electromagnetic shielding performance of the whole antistatic coating are both good. (5) The invention contains a proper amount of starch grafted sodium acrylate, which can actively adsorb moisture in the air when the air humidity is too high, thereby ensuring the integrity of the whole coating structure to a certain extent. (6) The invention generates a certain amount of air holes and water through the reaction of citric acid and sodium bicarbonate during final forming, part of the water is absorbed by starch grafted sodium acrylate in the gasification process, and then part of the water is evaporated in the high-temperature post-treatment process to form a cavity with contracted volume, so that the obtained sound insulation material is loose as a whole and contains a large number of compact air holes, the contracted starch grafted sodium acrylate in the air holes and the conductive resonance particles taking silicon dioxide as a core and doped with antimony tin oxide as a shell can eliminate the mechanical energy of sound waves to a certain degree through resonance, and has good sound insulation effect. Therefore, the invention has the characteristics of high temperature resistance, self-conductivity, surface water resistance, sound insulation and shock absorption.

Detailed Description

Example 1:

the preparation method of the conductive dehumidifying sound-proof flame-retardant sound-proof coating comprises the following steps:

① raw material preparation, 63kg of ethylene-vinyl acetate copolymer, 2.2kg of ethyl orthosilicate, 4.8kg of saturated ammonia water, 9kg of glass micropowder with the granularity of 2000-4000 meshes, 3.5kg of starch grafted sodium acrylate, 7kg of stannic chloride dihydrate, 1kg of antimony chloride, 0.06kg of citric acid powder, 0.05kg of sodium bicarbonate powder and enough ethanol are prepared according to the parts by weight;

② placing ethylene-vinyl acetate copolymer in a vacuum box, heating to 40-45 deg.C, drying for 2h to obtain matrix material, mixing the matrix material with starch grafted sodium acrylate, stirring, and pre-mixing with twin screw at 45-50 rpm/min and 78-83 deg.C for 8-10 min to obtain mixed homogeneous colloid;

③ dissolving ethyl orthosilicate in appropriate amount of ethanol to completely dissolve, standing for 12-15 min to obtain solution A, stirring solution A at 80-100 rpm/min, dripping saturated ammonia water uniformly and slowly in the time range of 35-40 min while stirring, continuing to stir for 5-8 min after dripping is finished, standing and sealing for 2-3 days to obtain sol solution B, putting glass micropowder into sol solution B completely, heating the mixture to 260-270 ℃ after stirring uniformly until the content is completely dried to form a cake, heating to 520-530 ℃ again, keeping for 60-80 min, air cooling to room temperature to obtain treated dried solid, and ball-milling the obtained dried solid to 800-1000 meshes to obtain particles C;

④ completely dissolving tin chloride dihydrate in ethanol, stirring and heating to 72-78 deg.C at 80-100 rpm/min under sealed environment, maintaining the temperature for 2-2.5 h, unsealing, continuously maintaining the temperature until the total weight of the solution is 50-60% of the original total weight, air cooling to room temperature, cooling, standing for 8-10 h to obtain sol solution D, completely dissolving antimony chloride in ethanol, stirring and heating to 72-78 deg.C at 80-100 rpm/min under sealed environment, and maintaining the temperature for 2-2.5 h to obtain sol solution E;

⑤, mixing the particles C, the sol solution D and the sol solution E completely and stirring the mixture fully and uniformly, heating the mixture until the mixture is completely dried, heating the mixture to 520-530 ℃, keeping the temperature for 1.5-2 h to obtain a composite dried substance, ball-milling the obtained composite dried substance to 500-800 meshes to obtain particles, and uniformly mixing the particles with the citric acid powder prepared in the step ① in the stage 1) to obtain the functional filler;

⑥ adding the functional filler into the homogeneous colloid, keeping the temperature for 5-8 min, stirring, and banburying to obtain the pre-coating, brushing the pre-coating on the inner wall of the warehouse, brushing the pre-coating with a thickness of 8-10 mm, and cooling to obtain the final product.

The sound insulation coating manufactured according to the embodiment has the overall conductivity of 100S/cm-120S/cm, the sound absorption coefficient range NRC of 0.70-0.78, the sound insulation amount of 15dB-18dB, the flame retardant property V-1, no toxic gas and smoke when contacting a fire source, environmental protection E0 grade methanol or formaldehyde-free property, and the following steps are the same.

Example 2:

the whole is in accordance with example 1, with the difference that:

① raw material preparation, which comprises preparing ethylene-vinyl acetate copolymer 60kg, ethyl orthosilicate 2kg, saturated ammonia water 4.5kg, glass micropowder with particle size of 2000-4000 mesh 8kg, starch grafted sodium acrylate 3kg, tin chloride dihydrate 6kg, antimony chloride 0.9kg, citric acid powder 0.05kg, sodium bicarbonate powder 0.05kg, and sufficient ethanol;

example 3:

the whole is in accordance with example 1, with the difference that:

① raw material preparation, which comprises preparing 65kg ethylene-vinyl acetate copolymer, 2.5kg ethyl orthosilicate, 5kg saturated ammonia water, 10kg glass micropowder with particle size of 2000-4000 meshes, 5kg starch graft sodium acrylate, 8kg stannic chloride dihydrate, 1.2kg antimony chloride, 0.06kg citric acid powder, 0.06kg sodium bicarbonate powder and sufficient ethanol;

the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (2)

1. The utility model provides a fire-retardant soundproof coating that electrically conducts dehumidification sound insulation which characterized in that: the sound insulation coating comprises a substrate and a functional filler, wherein the substrate is a silicon-based resin substrate prepared by taking 3-5 parts by weight of starch grafted sodium acrylate and 60-65 parts by weight of ethylene-vinyl acetate copolymer as raw materials, the functional filler is a conductive resonance particle which is prepared by taking 2-2.5 parts by weight of ethyl orthosilicate, 4.5-5 parts by weight of saturated ammonia water, 8-10 parts by weight of glass micropowder with the granularity of 2000-4000 meshes, 6-8 parts by weight of tin chloride dihydrate, 0.9-1.2 parts by weight of antimony chloride, 0.05-0.06 part by weight of citric acid powder and 0.05-0.06 part by weight of sodium bicarbonate powder as raw materials and has the particle size of 500-800 meshes, and the three-layer structure comprises three layers from inside to outside, specifically glass micropowder, active silicon dioxide and a substrate layer and an outer coating layer of antimony-doped tin oxide.

2. A manufacturing method of a conductive dehumidifying sound-proof flame-retardant sound-proof coating is characterized by comprising the following steps:

1) raw material preparation

① preparing raw materials, namely preparing 60 to 65 parts of ethylene-vinyl acetate copolymer, 2 to 2.5 parts of ethyl orthosilicate, 4.5 to 5 parts of saturated ammonia water, 8 to 10 parts of glass micro powder with the granularity of 2000 to 4000 meshes, 3 to 5 parts of starch grafted sodium acrylate, 6 to 8 parts of tin chloride dihydrate, 0.9 to 1.2 parts of antimony chloride, 0.05 to 0.06 part of citric acid powder and 0.05 to 0.06 part of sodium bicarbonate powder according to the parts by weight;

② preparing adjuvant materials by preparing enough ethanol;

2) substrate preparation

① placing the ethylene-vinyl acetate copolymer prepared in step ① of stage 1) in a vacuum box, heating to 40-45 ℃, and drying for 2h to obtain a matrix material;

②, mixing and uniformly stirring the matrix material obtained in the step ① and the starch grafted sodium acrylate prepared in the step ① in the stage 1), then carrying out twin-screw banburying, and banburying in advance for 8-10 min at the rotating speed of 45-50 rpm/min and the temperature of 78-83 ℃ to obtain a mixed homogeneous colloid, wherein the mixed homogeneous colloid is the required matrix;

3) functional filler preparation

① dissolving ethyl orthosilicate prepared in stage 1) stage ① in ethanol prepared in stage 1) stage ② to dissolve completely, standing for 12-15 min to obtain solution A;

②, stirring the solution A obtained in the step ① at a speed of 80-100 rpm/min, uniformly and slowly and completely dripping all the saturated ammonia water prepared in the step ① in the stage 1) within a time range of 35-40 min while stirring, continuing stirring for 5-8 min after dripping is finished, and then standing and sealing for 2-3 days to obtain a sol solution B;

③, completely putting the glass micropowder prepared in step ① of stage 1) into the sol solution B obtained in step ②, uniformly stirring, heating the mixed solution to 260-270 ℃ until the content is completely dried into a cake, then heating to 520-530 ℃, keeping for 60-80 min, air cooling to room temperature to obtain a treated dry solid, and ball-milling the obtained dry solid to 800-1000 meshes to obtain particles C;

④ completely dissolving the tin chloride dihydrate prepared in the step ① in the step 1) into 80-85 parts by weight of ethanol prepared in the step ②, stirring and heating to 72-78 ℃ at the speed of 80-100 rpm/min in a closed environment, preserving heat for 2-2.5 h, removing the seal, continuing preserving heat until the total weight of the solution is 48-50 parts by weight, then cooling to room temperature, and standing for 8-10 h after cooling to obtain a sol solution D;

⑤ completely dissolving 18-20 parts by weight of antimony chloride prepared in step ① in 18-20 parts by weight of ethanol prepared in step ② in stage 1), stirring and heating to 72-78 ℃ at the speed of 80-100 rpm/min in a closed environment, and preserving heat for 2-2.5 h to obtain sol solution E;

⑥ mixing the particles C obtained in step ③, the sol solution D obtained in step ④ and the sol solution E obtained in step ⑤, stirring them thoroughly until they are uniform, heating the mixture to 520-530 deg.C after it is completely dried, keeping the temperature for 1.5-2 h to obtain a composite dried substance, ball-milling the obtained composite dried substance to 500-800 meshes to obtain particles, mixing the particles with the citric acid powder prepared in step ① in step 1) to obtain the required functional filler

4) Conductive dehumidifying sound-proof flame-retardant sound-proof paint forming

①, adding the functional filler obtained in the step ⑥ in the stage 3) into the base body which is still in the banburying process and obtained in the step ② in the stage 2), continuously preserving the heat for 5min to 8min, and uniformly stirring while preserving the heat until the banburying is finished to obtain a prefabricated coating;

② brushing the prefabricated paint obtained in step ① on the inner wall surface of a warehouse of flammable and explosive materials, brushing the prefabricated paint with the thickness of 8mm-10mm, and cooling to obtain the required sound insulation paint.