CN115124890B - Water-based single-component interior wall damping sound-absorbing coating and preparation method thereof - Google Patents
Water-based single-component interior wall damping sound-absorbing coating and preparation method thereof Download PDFInfo
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- CN115124890B CN115124890B CN202210810260.XA CN202210810260A CN115124890B CN 115124890 B CN115124890 B CN 115124890B CN 202210810260 A CN202210810260 A CN 202210810260A CN 115124890 B CN115124890 B CN 115124890B
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- parts
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- interior wall
- expanded perlite
- component interior
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/08—Copolymers of ethene
- C09D123/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C09D123/0815—Copolymers of ethene with aliphatic 1-olefins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/04—Polymer mixtures characterised by other features containing interpenetrating networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention belongs to the technical field of coatings, and particularly relates to a water-based single-component interior wall damping sound-absorbing coating and a preparation method thereof. The water-based single-component interior wall damping sound-absorbing paint comprises the following raw materials in parts by weight: 20-30 parts of interpenetrating network structure plant fiber polypropylene composite emulsion, 8-12 parts of coated porous hydrophobic expanded perlite, 35-45 parts of pigment and filler, 0.5-0.7 part of cellulose ether, 0-4.5 parts of auxiliary agent and 15-30 parts of water, wherein the sum of the parts by weight of the components is 100 parts. The water-based single-component interior wall damping sound-absorbing coating has the advantages of simple production process, easy operation, large-scale reduction of labor cost and time cost, and suitability for mass production. The single-component system has simple construction process, can be rolled, brushed and sprayed, and is extremely suitable for large-area construction.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a water-based single-component interior wall damping sound-absorbing coating and a preparation method thereof.
Background
Along with the development of the China real estate industry, the construction industry of China is also continuously, healthily and rapidly developed. The paint is an important material in building decoration engineering, and becomes the fastest growing subsidiary industry in terms of economy, aesthetic property and safety. The building coating has unlimited potential for application and development of green buildings.
The harm of noise pollution to the health and daily life of people is valued, and the sound absorption function of buildings is gradually increased in a plurality of building functions. The sound absorbing material not only can improve indoor tone quality environment, but also plays a very important role in noise control. The improvement of the living standard of people has higher requirements on living environment, particularly in the aspect of noise control, the effect of the paint is not limited to decoration and protection, the simple function of common paint cannot meet the demands of people, and the common interior wall paint has no sound absorption function and cannot be used for solving the noise problem. The existing sound-absorbing paint has the defects of sound-absorbing effect, production cost, environmental protection and the like.
CN106010257a specifically discloses a noise-reducing and silencing coating, which is prepared from the following raw materials in parts by weight: 3 parts of titanium dioxide, 6 parts of phenolic resin, 1.5 parts of cyclohexanone, 2.5 parts of n-butanol, 20 parts of perlite, 2.5 parts of potassium stearate, 3 parts of sodium alginate, 20 parts of carboxyl-terminated polyester resin, 4 parts of aluminum powder, 35 parts of plant fiber, 2 parts of flame retardant, 4.5 parts of thermoplastic resin conductive adhesive, 1.5 parts of polydimethylsiloxane, 2.5 parts of organosilicon and 5 parts of talcum powder. The formula system belongs to an oily system, has higher VOC content, is not beneficial to the health of constructors and does not meet the standard of limiting the harmful substances in the wall coating for GB18582-2020 buildings because of larger wall surface area and more V0C volatilized in the drying process if applied to indoor decorative wall surfaces.
CN109321110a specifically discloses a sound-absorbing paint, which consists of the following raw materials in parts by weight: 20 parts of chrysotile fiber, 15 parts of polyurethane, 10 parts of glass fiber, 8 parts of graphite fiber, 3 parts of diatom ooze, 2 parts of defoamer and 30 parts of deionized water. The defoaming agent is silicone oil. The content of volatile organic compounds is detected to be 110g/L, and the content of free formaldehyde is detected to be 9mg/kg. Although the formula system is an aqueous system, the volatile organic compound content of the formula system is 110g/L, and the formula system still cannot meet the standard of limiting harmful substances in the wall coating for the GB18582-2020 building, wherein the volatile organic compound content of the inner wall coating is less than or equal to 80g/L.
CN107815239a discloses a sound-absorbing paint and a production method, which comprises the following raw materials in parts by weight: 40 parts of polyurethane, 5 parts of emulsion, 10 parts of mineral wool fiber, 20 parts of water, 2 parts of a composite coupling agent, 5 parts of diatom ooze, 5 parts of expanded perlite, 1 part of a leveling agent and 2 parts of a defoaming agent; the patent uses raw materials of slag cotton fiber and expanded perlite with silencing effect, and the finished product also has certain sound absorption effect, but because of the defect of selection and collocation of emulsion types, the film forming thickness is thinner, the sound absorption effect cannot be well exerted, the thickness is increased by repeated construction, time and labor are wasted, the labor construction cost is very high, and the practical application is not facilitated.
CN106587751a discloses a sound-absorbing paint for inner wall and its production method, which comprises (1) mixing tai bai powder 10kg, kaolin 26kg, light calcium powder 25kg, talcum powder 20kg, OK powder 10kg, cellulose 5kg, redispersible rubber powder 4kg and vitrified micro bubbles 5kg in a stirring tank at 22 deg.c for 42 min; (2) filtering the mixture through a filter screen having a mesh number 457; (3) And (3) placing the filtered mixture in a dryer for drying until the water content is 3%, thus obtaining a finished product. The final product of the patent is solid powder, which is similar to putty powder, and the surface is easy to fall off after construction and drying, and the paint is not a film-forming type paint.
Therefore, it is important to develop a water-based paint with damping effect, sound absorption, environmental protection and strong practicability.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the water-based single-component interior wall damping sound-absorbing paint which can be well applied to indoor decoration, absorb sound and reduce noise pollution, and can be widely applied to residential communities, tunnels, road sound-insulating barriers, villas, high-grade houses, hotels, schools, gymnasiums, concert halls, operas, factories and the like so as to overcome the defects of insufficient sound-absorbing and noise-reducing performance, higher VOC content, difficult double-component construction and the like of the paint in the prior art.
In order to achieve the above object, a first aspect of the present invention provides an aqueous one-component interior wall damping sound absorbing paint, the raw material composition of which comprises, by weight:
20-30 parts of interpenetrating network structure plant fiber polypropylene composite emulsion, 8-12 parts of coated porous hydrophobic expanded perlite, 35-45 parts of pigment and filler, 0.5-0.7 part of cellulose ether, 0-4.5 parts of auxiliary agent and 15-30 parts of water, wherein the sum of the parts by weight of the components is 100 parts.
Preferably, the pigment and filler is at least one selected from titanium white powder, talcum powder, ground calcium carbonate and quartz powder.
Preferably, the cellulose ether is at least one selected from the group consisting of methyl ethyl hydroxyethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose.
Preferably, the auxiliary agent is at least one selected from wetting agents, dispersing agents, defoaming agents, film forming auxiliary agents, antifreeze agents, pH regulators and sterilization mildewcides;
preferably, the auxiliary agent is 1.5-4.5 parts.
As a preferred scheme, the interpenetrating network structure plant fiber polypropylene composite emulsion is prepared by a method comprising the following steps:
step S1: mixing maleic anhydride with polypropylene to obtain a compatilizer of polypropylene grafted maleic anhydride;
step S2: mixing water and an emulsifying agent to obtain a emulsion phase, adding plant fibers, an elastomer, a compatilizer, a coupling agent and an antioxidant obtained in the step S1, controlling the temperature of a system to be 75-80 ℃, and uniformly mixing; controlling the system temperature to be 35-40 ℃, adding a pH regulator to regulate the pH value of the system to be 7.5-8.5, and uniformly mixing to obtain the interpenetrating network structure plant fiber polypropylene composite emulsion.
In the step S1, a compatilizer adopts a polar monomer grafted polymer, a grafted polymer matrix adopts polypropylene, and a grafted monomer adopts maleic anhydride; i.e. the compatibilizer used in step S2 is polypropylene grafted maleic anhydride.
In step S2, an emulsifier is used as an emulsion phase; plant fibers help to form interpenetrating network structures; the elastomer provides a certain damping effect; coupling agent, compatilizer: promoting the combination of the incompatible polymers together, thereby obtaining a stable blend; antioxidant: preventing adverse effect of oxygen and prolonging storage period; pH regulator: and the storage stability is improved by adjusting the water-soluble polymer to be in a weak alkaline condition.
As a preferred scheme, the plant fiber polypropylene composite emulsion with the interpenetrating network structure comprises the following raw materials in parts by weight:
in step S1: 5-10 parts of maleic anhydride and 90-95 parts of polypropylene;
in step S2: 10-15 parts of water, 1-3 parts of emulsifying agent, 20-50 parts of plant fiber, 40-50 parts of elastomer, 1-3 parts of compatilizer, 1-2 parts of coupling agent and 0.5-1 part of antioxidant.
Preferably, the emulsifier is at least one selected from polyoxyethylene ether and sodium alkyl benzene sulfonate.
Preferably, the plant fiber is a chopped fiber, more preferably a chopped fiber having a length of about 5mm, and even more preferably a jute fiber.
Preferably, the elastomer is at least one selected from ethylene and butene copolymers and ethylene and octene copolymers.
Preferably, the coupling agent is at least one selected from silane coupling agents and titanate coupling agents.
Preferably, the antioxidant is at least one selected from Tea Polyphenol (TP), butyl Hydroxy Anisole (BHA), dibutyl hydroxy toluene (BHT) and Tertiary Butyl Hydroquinone (TBHQ).
As a preferable scheme, the water absorption rate of the coated porous hydrophobic expanded perlite is less than or equal to 15 percent.
As a preferable scheme, the coated porous hydrophobic expanded perlite is prepared by a method comprising the following steps:
mixing and reacting a water-based polyurethane monomer, water, glycol, an initiator and porous expanded perlite powder, and cooling after composite coating to obtain an intermediate product;
and discharging the intermediate product, and performing reduced pressure suction filtration and drying to obtain the coated porous hydrophobic expanded perlite.
The preparation method of the coated porous hydrophobic expanded perlite is physical polymerization. Coating the porous expanded perlite powder by using a water-based polyurethane monomer; ethylene glycol is used as an antifreeze agent; initiating a water-based polyurethane monomer by an initiator to carry out polymerization reaction; the water provides a suitable viscosity environment to polymerize well.
As a preferable scheme, the raw materials of the coated porous hydrophobic expanded perlite comprise the following components in parts by weight:
50-70 parts of porous expanded perlite powder, 15-25 parts of aqueous polyurethane monomer, 10-20 parts of water, 1-2 parts of ethylene glycol and 0.01-0.05 part of initiator.
Preferably, the porous expanded perlite powder has a particle size of 60-120 mesh.
Preferably, the temperature of the mixing reaction is 50-65 ℃ and the time is 10-24h.
The second aspect of the present invention provides a method for preparing the above aqueous single-component interior wall damping sound-absorbing paint, which comprises the following steps:
and uniformly mixing water, optional auxiliary agents, pigment and filler, cellulose ether, interpenetrating network structure plant fiber polypropylene composite material emulsion and coated porous hydrophobic expanded perlite to obtain the water-based single-component interior wall damping sound-absorbing coating.
In the invention, the plant fiber polypropylene composite emulsion with interpenetrating network structure and the coated porous hydrophobic expanded perlite are mutually crosslinked within a specific proportion range to form a micro-hole space structure with a certain damping effect, a plurality of channels are reserved on the surface of a paint film for sound to enter, the sound is sucked like a plurality of small black holes, once the sound is not easy to enter, the sound collides, rubs and air viscous resistance in the inner space and heat conduction in the coating is generated due to the longer channels, and the energy of the sound wave is equivalent to partial acoustic energy converted into heat energy and gradually consumed in the process, thereby playing the role of sound absorption. The invention solves the problems of pulverization cracking phenomenon and conventional post-thickening gelation phenomenon of poor paint film strength caused by the application of the expanded perlite to the paint.
The water-based single-component interior wall damping sound-absorbing coating belongs to a water-based single-component system, has low Volatile Organic Compound (VOC) content, light smell, environment friendliness, simple preparation process, simple construction and the like.
The technical scheme of the invention has the following beneficial effects:
1) In the invention, the plant fiber polypropylene composite emulsion with interpenetrating network structure and the coated porous hydrophobic expanded perlite are mutually crosslinked within a specific proportion range to form a porous space structure with a certain damping effect, the damping effect has the important characteristic that the strain lags behind the stress, and because of the lag, energy loss, called mechanical loss or internal loss, exists in each cycle, and the consumed work is released in a thermal form. The actual process is to change a certain amount of kinetic energy and mechanical energy into heat energy, thereby playing a damping role in vibration reduction and noise reduction. From the microscopic view, the polymer converts vibration energy into heat energy through internal friction of internal molecular chains to dissipate the heat energy, so that the purposes of reducing vibration and noise are achieved. The porous structure enables the porous structure to continuously reflect and consume energy in the porous structure in the process of absorbing sound energy, and the cross-linking of the porous structure and the porous structure endows the coating with excellent sound energy consumption performance, so that the purpose of sound absorption effect is achieved, and the problems of chalking cracking phenomenon and conventional post-thickening gelation phenomenon, which are caused by the fact that perlite is applied to the coating, are solved in the research and development process.
2) In the invention, the selected composite material is not actively added with organic solvent, so that the composite material has the advantages of smell elimination and environmental protection, light smell and zero concentration of Volatile Organic Compounds (VOC) in the production process and the construction process of the coating, and helps people build a green and environmental-friendly living environment;
3) The water-based single-component interior wall damping sound-absorbing coating has the advantages of simple production process, easy operation, large-scale reduction of labor cost and time cost, and suitability for mass production. The single-component system has simple construction process, can be rolled, brushed and sprayed, and is extremely suitable for large-area construction.
The invention also provides a preparation method of the water-based single-component interior wall damping sound-absorbing paint, and the water-based single-component interior wall damping sound-absorbing paint prepared by the method has excellent sound absorption, environmental protection and crack resistance.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The experimental procedures, which are not specified in the following examples, are generally determined according to national standards. If the corresponding national standard does not exist, the method is carried out according to the general international standard, the conventional condition or the condition recommended by the manufacturer. Unless defined or otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, any method and material similar or equivalent to those described may be used in the methods of the present invention.
In the embodiment of the invention, the sources of the components are as follows: maleic anhydride: kane chemical Co., ltd; polypropylene: exxonMobil chemical ExxonMobil TM PP1304E6; emulsifying agent: 3-allyloxy-1-hydroxy-1-propanesulfonic acid sodium salt (COPS-1) of Guangzhou Deren New Material Co., ltd; an elastomer: ceramic chemical SD-65; plant fiber: wood fiber; coupling agent: the dakangning coupling agent Z-6040; pH regulator: AMP95; antioxidant: BASF Irganox 1010.
In the embodiment of the invention, the plant fiber polypropylene composite emulsion with the interpenetrating network structure is prepared by the following method:
step S1: mixing maleic anhydride with polypropylene to obtain a compatilizer of polypropylene grafted maleic anhydride;
step S2: mixing water and an emulsifying agent to obtain a emulsion phase, adding plant fibers, an elastomer, a compatilizer, a coupling agent and an antioxidant obtained in the step S1, controlling the temperature of a system to be 75-80 ℃, and uniformly mixing; controlling the system temperature to be 35-40 ℃, adding a pH regulator to regulate the pH value of the system to be 7.5-8.5, and uniformly mixing to obtain the interpenetrating network structure plant fiber polypropylene composite emulsion.
The plant fiber polypropylene composite emulsion with the interpenetrating network structure comprises the following raw materials in parts by weight:
in step S1: 10 parts of maleic anhydride and 90 parts of polypropylene;
in step S2: 14.5 parts of water, 2 parts of emulsifying agent, 35 parts of plant fiber, 45 parts of elastomer, 2 parts of compatilizer, 1 part of coupling agent and 0.5 part of antioxidant.
In the embodiment of the invention, the coated porous hydrophobic expanded perlite is prepared by the following method:
mixing and reacting a water-based polyurethane monomer, water, glycol, an initiator and porous expanded perlite powder, and cooling after composite coating to obtain an intermediate product;
and discharging the intermediate product, and performing reduced pressure suction filtration and drying to obtain the coated porous hydrophobic expanded perlite.
Wherein, the raw materials of the coated porous hydrophobic expanded perlite comprise the following components in weight:
60 parts of porous expanded perlite powder, 25 parts of aqueous polyurethane monomer, 13.98 parts of water, 1 part of glycol and 0.02 part of initiator.
Wherein,
the particle size of the porous expanded perlite powder is 120 meshes;
the temperature of the mixing reaction is 50-65 ℃ and the time is 10-24h.
Examples 1 to 3
The embodiment of the invention provides a water-based single-component interior wall damping sound-absorbing coating and a preparation method thereof, wherein the weight parts of the components are as shown in table 1:
table 1 amounts (parts by weight) of the components of examples 1 to 3
The specific preparation method of the water-based single-component interior wall damping sound-absorbing paint provided in the embodiment is as follows:
1) Evenly mixing deionized water, a wetting dispersant and a defoaming agent in a stirring state of 400-500 r/min, and stirring for 5-10 min to obtain an auxiliary agent premix;
2) Slowly adding pigment and filler into the auxiliary agent premix liquid obtained in the step 1), gradually increasing the rotating speed to 800-1000 r/min, and stirring for 5-10 min until stirring is uniform; adding cellulose and a pH regulator, and dispersing at a high speed of 1200-1500 r/min for 10-15min to obtain aqueous single-component interior wall damping and sound absorbing coating slurry;
3) Adjusting the stirring rotation speed to 600-800 r/min in the slurry obtained in the step 2), adding the interpenetrating network structure plant fiber polypropylene composite emulsion, uniformly mixing, and then sequentially adding the sterilizing mildew inhibitor, the film forming auxiliary agent, the antifreeze agent, the defoaming agent and part of water to obtain the water-based single-component interior wall damping sound-absorbing paint base material;
4) And (3) turning the base material obtained in the step (3) from a dispersing cylinder to a stirring cylinder, slowly adding the coated porous hydrophobic expanded perlite and the residual water, and uniformly mixing to obtain the water-based single-component interior wall damping sound-absorbing coating.
Comparative examples 1 to 7
The embodiment of the invention provides a water-based single-component interior wall damping sound-absorbing coating and a preparation method thereof, wherein the comparative example is based on the embodiment 2, the main film-forming substances, perlite and pigment and filler are adjusted, the comparative example 1 uses conventional elastic acrylic emulsion, the expanded perlite is not subjected to surface treatment (common expanded perlite), and the particle size is 0-0.5 mm; comparative example 2 used a polyurethane emulsion commonly found on the market; comparative example 3 used a conventional styrene-acrylic emulsion for latex paint; comparative examples 4-5 adjusted the mass fraction of the interpenetrating network structure plant fiber polypropylene composite emulsion; comparative examples 6-7 the mass fraction of coated porous hydrophobic expanded perlite was adjusted. The amounts of the components are shown in tables 2 and 3:
table 2 comparative examples 1 to 3 in terms of the amounts (parts by weight) of the respective components
| Name of the name | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Deionized water | 22.8 | 22.8 | 22.8 |
| Baolijia elastic acrylic emulsion BLJ-05 | 25.0 | / | / |
| Dissmann polyurethane emulsion | / | 25.0 | / |
| BaderFu styrene-acrylic emulsion RS-926JW | / | / | 25.0 |
| Ordinary expanded perlite | 10.0 | / | / |
| Titanium white powder | 3 | 3 | 3 |
| Heavy calcium carbonate of 250 meshes | 30 | 37 | 37 |
| 325 mesh quartz powder | 5 | 5 | 5 |
| Hydroxyethyl cellulose 250HBR | 0.6 | 0.6 | 0.6 |
| Dow EH-9 wetting agent | 0.1 | 0.1 | 0.1 |
| Gaotai P30 dispersing agent | 0.5 | 0.5 | 0.5 |
| Shennupu-NXZ defoamer | 0.7 | 0.7 | 0.7 |
| LOCA TS film forming aid for promoting growth | 1.0 | 1.0 | 1.0 |
| Glycol antifreeze agent | 0.5 | 0.5 | 0.5 |
| AMP-95PH modulators | 0.2 | 0.2 | 0.2 |
| THOR EG-CONC bactericide | 0.2 | 0.2 | 0.2 |
| THOR MBS 5050 bactericide | 0.4 | 0.4 | 0.4 |
| Totals to | 100.0 | 100.0 | 100.0 |
Table 3 comparative examples 4 to 7 in terms of the amounts of the components (parts by weight)
Test example
Examples 1-3 and comparative examples 1-7 were tested as follows:
film forming property at low temperature: 200g of the sample, the substrate and a wet film preparation device with the specification of 2mm are placed in an environment of (5+/-1) DEG C, taken out after 2 hours, the wet film preparation device which is just taken out is used for scraping and coating for one time within 30 seconds, the test board is immediately replaced (for a low-temperature box with a forced air blowing function, a metal cover is covered on the surface of the test board during testing), the test board is taken out after 24 hours, the dryness is immediately checked according to the method of the surface drying B method in GB/T1728-1979, the appearance of a coating film is visually checked, such as the phenomenon that the coating film is dried, has no cracking and the like, and the film forming at the temperature of 5 ℃ is evaluated to be abnormal.
Sound absorption grade: according to GB/T16731-1997, the sound absorption performance of the building sound absorption product adopts a reverberation room method sound absorption coefficient measured under the condition that the sound absorption product is attached to a rigid wall, the Noise Reduction Coefficient (NRC) is used as a single-value evaluation quantity of the sound absorption performance of the building sound absorption product, and the sound absorption product is graded according to the upper limit and the lower limit of the Noise Reduction Coefficient (NRC). The upper and lower limits of NRC for each class are shown in the table below.
Table 4 hierarchical table of sound absorption properties of sound absorption products for construction
| Grade | Noise reduction coefficient, NRC |
| Ⅰ | NRC≥0.80 |
| Ⅱ | 0.80＞NRC≥0.60 |
| Ⅲ | 0.60＞NRC≥0.40 |
| Ⅳ | 0.40＞NRC≥0.20 |
(1) Storage stability: according to the method specified in GB/T6753.3-86.
(2) Low temperature stability: the method is carried out according to the A method in GB/T9268-2008.
(3) Smell: the cover is opened, no obvious smell is 10 points, the pungent smell is 1 point, the middle point is scored according to actual conditions, and the higher the score is, the clearer the taste is.
(4) Bond strength: this was performed as specified in JG/T24-2018, method 7.17.
The results of the main performance tests are shown in Table 4.
TABLE 5 Standard test results for examples 1-3 and comparative examples 1-7
Note that: all the scoring items are 10min optimal, 8 min better, 6 min qualified and 1 min worst.
As can be seen from the experimental results in Table 5, the aqueous single-component interior wall damping sound-absorbing coatings prepared in examples 1 to 3 have excellent sound-absorbing performance, good storage stability and good film-forming property at low temperature. The properties of comparative examples 1 to 3 are significantly inferior to those of examples: comparative example 1 used a conventional elastic acrylic emulsion, the expanded perlite was not surface treated (ordinary expanded perlite), the particle size was 0 to 0.5mm, and it could not reach the standard in terms of storage stability; the comparative example 2 and the comparative example 3 respectively use polyurethane emulsion and common styrene-acrylic emulsion, are matched with conventional powder, do not use coated porous hydrophobic expansion, and have better film forming property at low temperature and heat storage stability, but have no sound absorption effect; in comparative examples 4-7, it can be seen that the interpenetrating network structure styrene-acrylic acid viscoelastic body polymer emulsion and the coated porous hydrophobic expanded perlite are crosslinked with each other within a specific proportion range, so that the coating has better low-temperature film forming property and sound absorbing effect;
in summary, the plant fiber polypropylene composite emulsion with interpenetrating network structure and the coated porous hydrophobic expanded perlite are mutually crosslinked within a specific proportion range to form a porous space structure with a certain damping effect, so that the coating has excellent sound energy consumption performance, thereby achieving the sound absorption effect, and solving the chalking cracking phenomenon and the conventional post-thickening gelling phenomenon of poor paint film strength caused by the application of the perlite to the coating in the research and development process.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (9)
1. The aqueous single-component interior wall damping and sound absorbing coating is characterized by comprising the following raw materials in parts by weight:
20-30 parts of interpenetrating network structure plant fiber polypropylene composite emulsion, 8-12 parts of coated porous hydrophobic expanded perlite, 35-45 parts of pigment and filler, 0.5-0.7 part of cellulose ether, 0-4.5 parts of auxiliary agent and 15-30 parts of water, wherein the sum of the parts by weight of the components is 100 parts;
the plant fiber polypropylene composite emulsion with the interpenetrating network structure is prepared by a method comprising the following steps:
step S1: mixing maleic anhydride with polypropylene to obtain a compatilizer of polypropylene grafted maleic anhydride;
step S2: mixing water and an emulsifying agent to obtain a emulsion phase, adding plant fibers, an elastomer, a compatilizer, a coupling agent and an antioxidant obtained in the step S1, controlling the temperature of a system to be 75-80 ℃, and uniformly mixing; controlling the system temperature to be 35-40 ℃, adding a pH regulator to regulate the pH value of the system to be 7.5-8.5, and uniformly mixing to obtain the interpenetrating network structure plant fiber polypropylene composite emulsion.
2. The aqueous one-component interior wall damping sound absorbing coating of claim 1, wherein,
the pigment and filler is at least one selected from titanium dioxide, talcum powder, heavy calcium carbonate and quartz powder;
the cellulose ether is at least one selected from methyl ethyl hydroxyethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose;
the auxiliary agent is at least one selected from wetting agents, dispersing agents, defoaming agents, film forming auxiliary agents, antifreeze agents, pH regulators and sterilizing mildew inhibitors;
1.5-4.5 parts of auxiliary agent.
3. The aqueous single-component interior wall damping sound absorbing coating of claim 1, wherein the interpenetrating network structure vegetable fiber polypropylene composite emulsion comprises the following raw materials in weight:
in step S1: 5-10 parts of maleic anhydride and 90-95 parts of polypropylene;
in step S2: 10-15 parts of water, 1-3 parts of emulsifying agent, 20-50 parts of plant fiber, 40-50 parts of elastomer, 1-3 parts of compatilizer, 1-2 parts of coupling agent and 0.5-1 part of antioxidant.
4. The aqueous one-component interior wall damping sound absorbing coating of claim 1, wherein,
the emulsifier is at least one selected from polyoxyethylene ether and sodium alkyl benzene sulfonate;
the plant fiber is selected from chopped fibers;
the elastomer is selected from at least one of ethylene and butene copolymer and ethylene and octene copolymer;
the coupling agent is at least one selected from silane coupling agents and titanate coupling agents;
the antioxidant is at least one selected from tea polyphenol, butyl hydroxy anisole, dibutyl hydroxy toluene and tertiary butyl hydroquinone.
5. The aqueous single-component interior wall damping sound absorbing coating of claim 1, wherein the water absorption of the coated porous hydrophobic expanded perlite is less than or equal to 15%.
6. The aqueous single-component interior wall damping sound absorbing coating of claim 1, wherein the coated porous hydrophobic expanded perlite is prepared by a process comprising the steps of:
mixing and reacting a water-based polyurethane monomer, water, glycol, an initiator and porous expanded perlite powder, and cooling after composite coating to obtain an intermediate product;
and discharging the intermediate product, and performing reduced pressure suction filtration and drying to obtain the coated porous hydrophobic expanded perlite.
7. The aqueous one-component interior wall damping sound absorbing coating of claim 6, wherein the raw material composition of the coated porous hydrophobic expanded perlite comprises, by weight:
50-70 parts of porous expanded perlite powder, 15-25 parts of aqueous polyurethane monomer, 10-20 parts of water, 1-2 parts of ethylene glycol and 0.01-0.05 part of initiator.
8. The aqueous one-component interior wall damping sound absorbing coating of claim 6, wherein,
the particle size of the porous expanded perlite powder is 60-120 meshes;
the temperature of the mixing reaction is 50-65 ℃ and the time is 10-24h.
9. The method for preparing the aqueous single-component interior wall damping and sound-absorbing paint as claimed in any one of claims 1 to 8, which is characterized in that the method comprises the following steps:
and uniformly mixing water, optional auxiliary agents, pigment and filler, cellulose ether, interpenetrating network structure plant fiber polypropylene composite material emulsion and coated porous hydrophobic expanded perlite to obtain the water-based single-component interior wall damping sound-absorbing coating.
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| WO2008035197A2 (en) * | 2006-09-22 | 2008-03-27 | Daniele Furin | A sound-proofing/heat insulating material and a process for production thereof |
| CN106243518A (en) * | 2016-08-29 | 2016-12-21 | 合肥会通新材料有限公司 | A kind of reduction air conditioner noises polypropylene composite materials PP Pipe Compound and preparation method thereof |
| CN106317633A (en) * | 2016-08-29 | 2017-01-11 | 合肥会通新材料有限公司 | Noise-insulating filling polypropylene material for vacuum cleaner and preparation method of noise-insulating filling polypropylene material |
| CN110437694A (en) * | 2019-07-31 | 2019-11-12 | 山东七维新材料有限公司 | Wide temperature range high water resistance aqueous damping coating and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 聚丙烯改性技术及制品应用;陈程林;;玻璃纤维(03) * |
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