CN115417589A - High-heat-preservation rock wool board and production process thereof - Google Patents
High-heat-preservation rock wool board and production process thereof Download PDFInfo
- Publication number
- CN115417589A CN115417589A CN202211003655.5A CN202211003655A CN115417589A CN 115417589 A CN115417589 A CN 115417589A CN 202211003655 A CN202211003655 A CN 202211003655A CN 115417589 A CN115417589 A CN 115417589A
- Authority
- CN
- China
- Prior art keywords
- rock wool
- heat
- wool board
- coating
- preservation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011490 mineral wool Substances 0.000 title claims abstract description 207
- 238000004321 preservation Methods 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 71
- 239000011248 coating agent Substances 0.000 claims abstract description 68
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 35
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 35
- -1 polydimethylsiloxane Polymers 0.000 claims abstract description 35
- 239000006229 carbon black Substances 0.000 claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 24
- 229910021392 nanocarbon Inorganic materials 0.000 claims abstract description 20
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims description 45
- 239000000835 fiber Substances 0.000 claims description 17
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 14
- 239000005011 phenolic resin Substances 0.000 claims description 14
- 229920001568 phenolic resin Polymers 0.000 claims description 14
- 229920002545 silicone oil Polymers 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 239000000155 melt Substances 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 8
- 239000003929 acidic solution Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000003607 modifier Substances 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 239000010459 dolomite Substances 0.000 claims description 5
- 229910000514 dolomite Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 230000000694 effects Effects 0.000 description 9
- 239000000047 product Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000002940 repellent Effects 0.000 description 4
- 239000005871 repellent Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004794 expanded polystyrene Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002470 thermal conductor Substances 0.000 description 1
- 238000011041 water permeability test Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/005—Manufacture of flakes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
- C03C25/14—Spraying
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/48—Coating with two or more coatings having different compositions
- C03C25/54—Combinations of one or more coatings containing organic materials only with one or more coatings containing inorganic materials only
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a high-heat-preservation rock wool board, which relates to the technical field of heat-preservation materials and comprises a rock wool board and a hydrophobic coating sprayed on the surface of the rock wool board, wherein the rock wool board is formed by stacking and pressing rock wool felts in an S shape, a waterproof heat-preservation coating is sprayed on the surface of the rock wool felts, and the coating rate of the waterproof heat-preservation coating is 80-130 g/m 2 The waterproof heat-insulation coating comprises the following raw materials in parts by weight: 70-90 parts of polydimethylsiloxane, 5-20 parts of fumed silica, 15-25 parts of nano carbon black and 6-11 parts of curing agent; the waterproof heat-preservation coating is sprayed on the surface of the rock wool felt on a single side or double sides; also provides a production process of the high-heat-preservation rock wool board. According to the invention, a plurality of waterproof heat-insulating coatings are formed inside and on the surface of the rock wool boardThe heat conductivity coefficient can be as low as 0.024W/m.K, the contact angle of the surface can reach 163 degrees, and the heat insulation and waterproof performance is excellent.
Description
Technical Field
The invention relates to the technical field of heat insulation materials, in particular to a high-heat-insulation rock wool board and a production process thereof.
Background
The rock wool is one kind of mineral wool, is fluffy short fine fiber made of natural rock and minerals, has good heat insulation performance, has a heat conductivity coefficient of only 0.029-0.044W/m.K, is commonly used for heat insulation of high-temperature equipment such as steam pipelines, heating furnaces and the like in industrial production, and is also used for heat insulation of external walls of buildings in recent years along with the attention of people on fire prevention of the buildings to replace organic heat insulation materials such as expanded polystyrene boards, extruded sheets, polyurethane foam and the like.
According to the classification of combustion performance of building materials and products, rock wool belongs to a non-combustible material (A class), can effectively prevent a building fire from spreading along an outer wall heat-insulating material, has a thermal load shrinkage temperature of more than 600 ℃, can ensure that an outer wall heat-insulating system cannot easily collapse and shrink in the fire, and has high fire resistance.
The rock wool board is obviously superior to organic heat-insulating materials in fireproof performance, but has obvious disadvantage in heat-insulating performance. The application of the rock wool board in the external thermal insulation system of the external wall is researched by Xiaoqun Fang and the like [1] The indexes of the drawing strength, the compression strength, the water absorption rate and the like of the rock wool board and the organic board are compared, and the water absorption rate (amount) of the rock wool board is obviously higher than that of the boards such as an EPS board, an XPS board, a PU board and the like, and the heat insulation performance of the rock wool board is obviously reduced after the rock wool board absorbs water because the water is a good thermal conductor. Furthermore, even if water absorption is not a concern, rock wool boards do not have as good heat insulating properties as polyurethane foams (thermal conductivity 0.018-0.023W/m.K) [2] . The heat-insulating performance of the outer wall of the building not only influences the living experience, but also has obvious influence on the energy consumption of cooling in summer and heating in winter, so that the rock wool board replaces the traditional organic heat-insulating material and still has a barrier in application.
Reference documents:
[1] the glass wool board and rock wool board are used in external wall heat-insulating system to research its key technology, and the new building material 2014 (3) is 41-44.
[2] Zhang 29710, wanghai, dingyueli, kufeng, pengting, analysis of the type and fire resistance of the external wall insulation material, anhui chemical engineering, 2012,38 (6): 6-8.
Disclosure of Invention
The invention aims to: the high-heat-insulation rock wool board has the advantages of low heat conductivity coefficient and low water absorption rate, and solves the problem that the existing rock wool board has obvious difference in heat insulation effect from the traditional organic heat insulation material.
The technical scheme adopted by the invention is as follows:
a high heat preservation rock wool board, includes rock wool board and spraying in the hydrophobic coating on rock wool board surface, the rock wool board is the S-shaped by the rock wool felt and piles up and suppress and form, the rock wool boardThe surface of the rock wool felt is sprayed with a waterproof heat-insulating coating, and the coating rate of the waterproof heat-insulating coating is 80-130 g/m 2 The waterproof heat-insulation coating comprises the following raw materials in parts by weight: 70-90 parts of polydimethylsiloxane, 5-20 parts of fumed silica, 15-25 parts of nano carbon black and 6-11 parts of curing agent;
the waterproof heat-preservation coating is sprayed on the surface of the rock wool felt on a single side or a double side, and the spraying process is as follows:
uniformly mixing polydimethylsiloxane, fumed silica and a curing agent, spraying the mixture on the surface of the rock wool felt, then spraying nano carbon black, and drying and curing.
Preferably, the rock wool felt comprises the following raw materials in parts by weight: 100 parts of rock wool fiber and 4-10 parts of phenolic resin adhesive.
Preferably, the surface of the rock wool panel is modified by a modifier, and the modifier is an acid solution with the pH value of 2.5-4.5.
Preferably, the viscosity of the polydimethylsiloxane is 800 to 1200cp (25 ℃), and the mesh number of the fumed silica and the nano carbon black is not less than 1250 meshes.
Preferably, the hydrophobic coating is an inert silicone oil emulsion coating.
Preferably, the spraying thickness of the hydrophobic coating is 0.1-0.3 mm.
Preferably, the acidic solution is an aqueous solution of hydrochloric acid or hypochlorous acid.
The invention also provides a production process of the high-heat-preservation rock wool board, which comprises the following steps:
s1: adding the ore into a cupola furnace, and melting at 1450-1600 ℃;
s2: pouring the melt flowing out of the cupola furnace into a rock wool centrifuge, and drawing the melt into rock wool fibers;
s3: collecting rock wool fibers by using a catching belt to form a rock wool felt, and spraying a phenolic resin adhesive on the rock wool felt;
s4: uniformly spraying a waterproof heat-preservation coating on the surface of the rock wool felt, and then baking for 10-30 min at the temperature of 60-80 ℃;
s5: conveying the baked rock wool felt to a pendulum bob machine through a conveyor for stacking, and conveying the stacked rock wool felt to a cotton pressing machine for pressing the rock wool felt after the stacking is finished to obtain a rock wool board;
s6: sending the rock wool board into a high-temperature curing furnace, curing at 170-250 ℃ for more than 30min, and cutting the rock wool board into blocky rock wool boards after curing;
s7: and (3) spraying a hydrophobic coating on the surface of the rock wool board, and drying at the temperature of 80-120 ℃ to obtain the high-heat-preservation rock wool board.
Preferably, the ore is a mixture of basalt, dolomite, limestone and iron ore.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
(1) According to the invention, the waterproof heat-insulation coating is sprayed on the surface of the rock wool felt, when the rock wool felt is pressed into the rock wool board, the rock wool felt is folded in an S shape, so that a plurality of layers of waterproof heat-insulation coatings are formed in and on the surface of the rock wool board, and the coefficient of heat conductivity of fumed silica in the waterproof heat-insulation coatings is lower than that of the rock wool, which is equivalent to that a plurality of heat-insulation layers are formed in and on the surface of the rock wool board, so that the heat-insulation performance of the rock wool board is improved;
(2) The polydimethylsiloxane in the waterproof heat-insulation coating has strong hydrophobicity, the nano carbon black is added into the polydimethylsiloxane and is suspended on the surface of the waterproof heat-insulation coating, after the nano carbon black is cured, the waterproof heat-insulation coating forms a rough surface on a microscale, the surface has a large number of tiny gaps or pits which can contain air, the gaps or the pits are difficult to be wetted by water, the moisture can be effectively prevented from permeating into the rock wool board, and the waterproof effect is excellent;
(3) The surface of the rock wool board adopts the inert silicon oil emulsion coating as the hydrophobic coating, and because the alkali resistance of the inert silicon oil is poor, when the rock wool board is used as a rock wool water repellent, the hydrophobic performance of the rock wool board can be reduced or even disappear when the rock wool board is high in alkalinity such as cement-based materials.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and it should be understood that the specific examples described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.
Example 1
This embodiment provides a production technology of high heat preservation rock wool board, and concrete step is as follows:
s1: adding basalt, dolomite, limestone and iron ore into a cupola furnace, and melting at 1450-1600 ℃;
s2: pouring the melt flowing out of the cupola into a rock wool centrifuge, and drawing the melt into rock wool fibers;
s3: collecting rock wool fibers by using a trapping belt to form a rock wool felt, and spraying a phenolic resin adhesive on the rock wool felt, wherein the weight ratio of the phenolic resin adhesive to the rock wool felt is 100;
s4: taking 80 parts by weight of polydimethylsiloxane, 12 parts by weight of fumed silica, 18 parts by weight of nano carbon black and 8 parts by weight of curing agent, uniformly mixing the polydimethylsiloxane, the fumed silica and the curing agent by using a high-speed shearing dispersion machine, spraying the mixture on the surface of a rock wool felt to form a layer of coating for fixing the carbon black, uniformly spraying the carbon black on the coating by using a powder spraying machine, baking the coating for 10min at the temperature of 80 ℃ to cure the coating to form a waterproof heat-insulation coating, wherein the total coating rate of the waterproof heat-insulation coating (containing the carbon black) is 110g/m 2 ；
The polydimethylsiloxane, the curing agent, the fumed silica and the nano carbon black are all commercially available products, wherein: the viscosity section of the polydimethylsiloxane is 800-1200 cp (25 ℃), the mesh number of the fumed silica is 1250 meshes, the average grain diameter of the nano carbon black is 25nm, the curing agent is a polydimethylsiloxane curing agent, and the curing agent and the used polydimethylsiloxane are purchased from Dow Corning company;
s5: conveying the baked rock wool felt to a pendulum bob machine through a conveyor for stacking, and conveying the stacked rock wool felt to a cotton pressing machine for pressing the rock wool felt after the stacking is finished to obtain a rock wool board;
s6: feeding the rock wool board into a high-temperature curing furnace, curing at the high temperature of 200 ℃ for 30min, and cutting the rock wool board into blocky rock wool boards after curing;
s7: and (3) spraying inert silicone oil emulsion on the surface of the rock wool board, wherein the spraying thickness is 0.2mm, and drying at 120 ℃ to form a hydrophobic coating, thus obtaining the high-heat-preservation rock wool board.
In this embodiment, an online weighing machine may be provided in step S3 to perform online measurement on the yield of the rock wool felt, and the spraying speed of the phenolic resin binder may be adjusted according to the production speed of the rock wool felt, so as to control the ratio of the phenolic resin binder to the rock wool felt.
The polydimethylsiloxane and the matched curing agent can be replaced by other products sold in the market, and the viscosity section of the polydimethylsiloxane meets 800-1200 cp (25 ℃) and meets the use requirement of the process.
In this embodiment, waterproof insulation coating is the single face spraying, through folding shop, the suppression, can form multilayer waterproof insulation coating in the inside of rock wool board and the upper surface of rock wool board after the cutting, in actual operation, also can adopt two-sided spraying mode, in two-sided spraying mode, through folding shop, the suppression, the rock wool board that obtains after the cutting, the upper and lower surface all has one deck waterproof insulation coating, not only can prevent that moisture from the mortar from permeating to the rock wool board in the work progress, can also prevent that moisture from permeating to the rock wool board from the wall body, and inside not only forms multilayer waterproof insulation coating, and the thickness on each layer is equivalent to the twice of single face spraying, the prevention of seepage water effect is better.
Example 2
A production process of a high-heat-preservation rock wool board comprises the following specific steps:
s1: adding basalt, dolomite, limestone and iron ore into a cupola furnace, and melting at 1450-1600 ℃;
s2: pouring the melt flowing out of the cupola furnace into a rock wool centrifuge, and drawing the melt into rock wool fibers;
s3: collecting rock wool fibers by using a trapping belt to form a rock wool felt, and spraying a phenolic resin adhesive on the rock wool felt, wherein the weight ratio of the phenolic resin adhesive to the rock wool felt is 100;
s4: taking 70 parts by weight of polydimethylsiloxane, 5 parts by weight of fumed silica, 15 parts by weight of nano carbon black and 6 parts by weight of curing agent, uniformly mixing the polydimethylsiloxane, the fumed silica and the curing agent by using a high-speed shearing dispersion machine, spraying the mixture on the surface of a rock wool felt to form a layer of coating for fixing the carbon black, uniformly spraying the carbon black on a wet film by using a powder spraying machine, baking the wet film at 60 ℃ for 30min to solidify the wet film to form a waterproof heat-insulating coating, wherein the total coating rate of the waterproof heat-insulating coating (containing the carbon black) is 80g/m 2 ；
The polydimethylsiloxane, the curing agent, the fumed silica and the nano carbon black are all commercially available products, wherein: the viscosity section of the polydimethylsiloxane is 800-1200 cp (25 ℃), the mesh number of the fumed silica is 1250 meshes, the average grain diameter of the nano carbon black is 25nm, the curing agent is a polydimethylsiloxane curing agent, and the curing agent and the used polydimethylsiloxane are purchased from Dow Corning company;
s5: conveying the baked rock wool felt to a pendulum bob machine through a conveyor for stacking, and conveying the stacked rock wool felt to a cotton pressing machine for pressing the rock wool felt after the stacking is finished to obtain a rock wool board;
s6: feeding the rock wool boards into a high-temperature curing furnace, curing at 170 ℃ for 45min, and cutting into blocky rock wool boards after curing;
s7: and (3) spraying inert silicone oil emulsion on the surface of the rock wool board, wherein the spraying thickness is 0.3mm, and drying at 100 ℃ to form a hydrophobic coating, thus obtaining the high-heat-preservation rock wool board.
Example 3
A production process of a high-heat-preservation rock wool board comprises the following specific steps:
s1: adding basalt, dolomite, limestone and iron ore into a cupola furnace, and melting at 1450-1600 ℃;
s2: pouring the melt flowing out of the cupola furnace into a rock wool centrifuge, and drawing the melt into rock wool fibers;
s3: collecting rock wool fibers by using a catching belt to form a rock wool felt, and spraying a phenolic resin adhesive to the rock wool felt, wherein the weight ratio of the phenolic resin adhesive to the rock wool felt is 100;
s4: according to the weight parts, 90 parts of polydimethylsiloxane, 20 parts of fumed silica, 25 parts of nano carbon black and 11 parts of curing agent are taken, the polydimethylsiloxane, the fumed silica and the curing agent are uniformly mixed by using a high-speed shearing dispersion machine and sprayed on the surface of a rock wool felt to form a layer of coating for fixing the carbon black, then the carbon black is uniformly sprayed on a wet film by using a powder spraying machine, and the wet film is baked at 70 ℃ for 18min to be cured to form a waterproof heat-insulation coating, wherein the total coating rate of the waterproof heat-insulation coating (containing the carbon black) is 130g/m 2 ；
The polydimethylsiloxane, the curing agent, the fumed silica and the nano carbon black are all commercially available products, wherein: the viscosity section of the polydimethylsiloxane is 800-1200 cp (25 ℃), the mesh number of the fumed silica is 1250 meshes, the average grain diameter of the nano carbon black is 25nm, the curing agent is a polydimethylsiloxane curing agent, and the curing agent and the used polydimethylsiloxane are purchased from Dow Corning company;
s5: conveying the baked rock wool felt to a pendulum bob machine through a conveyor for stacking, and conveying the stacked rock wool felt to a cotton pressing machine for pressing the rock wool felt after the stacking is finished to obtain a rock wool board;
s6: feeding the rock wool board into a high-temperature curing furnace, curing at the high temperature of 250 ℃ for 30min, and cutting the rock wool board into blocky rock wool boards after curing;
s7: and (3) spraying inert silicone oil emulsion on the surface of the rock wool board, wherein the spraying thickness is 0.1mm, and drying at 80 ℃ to form a hydrophobic coating, thus obtaining the high-heat-preservation rock wool board.
Example 4
This example is the same as example 1 in most of its steps, except that: in step S7, the spraying thickness of the inert silicone oil emulsion is 0.3mm.
In the above embodiments 1 to 4, when the rock wool mats are stacked in step S5, the rock wool mats are all folded in the S shape, and the S-shaped folding herein does not limit the total number of 3 rock wool mats after being stacked, but describes the folding manner thereof, and the number of stacked layers of rock wool mats can be arbitrarily increased without exceeding the production capacity of the pendulum bob machine, and in the above embodiments 1 to 4, the number of stacked layers in step S5 is all 6.
The high thermal insulation rock wool boards prepared in examples 1 to 4 were subjected to performance tests including thermal conductivity measurement and water permeability test as follows:
(1) and (3) measuring the heat conductivity coefficient:
the measurement method is as follows:
the high-temperature-preservation rock wool boards prepared in examples 1 to 4 were cut into test pieces of 300X 40mm, 10 pieces for each example, 2 test pieces were randomly selected for each example after being numbered in sequence, the thermal conductivity was measured using a flat plate thermal conductivity meter and compared with a rock wool board of a certain manufacturer, and the results are shown in the following table 1:
table 1 high heat insulation rock wool panel heat conductivity prepared in examples 1 to 4
(2) And (3) testing the waterproof performance:
since the hydrophobicity of the common rock wool board can reach more than 98 percent generally, and the difference of the water resistance performance is difficult to compare visually, the method for measuring the static contact angle is adopted for comparison, the measuring instrument is a German Fei OCA 15EC type contact angle measuring instrument, 3 samples are taken in each embodiment, each sample is measured for 3 times and averaged, and compared with the rock wool board of a certain manufacturer, and the results are shown in the following table 2:
table 2 contact angles of high heat insulating rock wool panels prepared in examples 1 to 4
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example | |
| Contact angle/° | 152 | 147 | 154 | 151 | 117 |
As can be seen from tables 1 and 2, the high-heat-preservation rock wool boards prepared in the embodiments 1 to 4 of the invention have greater advantages in heat preservation performance and waterproof performance compared with the rock wool boards sold in the market; meanwhile, in comparative examples 1 to 3, it can be seen that the contact angle of the surface of the rock wool board is increased after the coating rate of the waterproof heat-preservation coating is increased, but the coating rate is increased from 110g/m 2 Increased to 130g/m 2 When the contact angle increases, it is not significant; comparative examples 1 and 4 show that the contact angle of the inert silicone oil emulsion is not obviously changed when the spraying thickness is increased from 0.2mm to 0.3mm, and the increase of the using amount of the inert silicone oil emulsion on the basis of example 1 has no obvious benefit on the improvement of the waterproof performance.
Example 5
Considering that the inert silicone oil has poor alkali resistance, when the inert silicone oil is used as a rock wool water repellent, the water repellent performance of the rock wool water repellent is reduced or even disappears when the inert silicone oil is in high alkalinity such as a cement-based material, on the basis of the example 1, the surface of the rock wool board is modified by adopting a low-concentration acidic solution, and the specific process is as follows:
s1: adding the ore into a cupola furnace, and melting at 1450-1600 ℃;
s2: pouring the melt flowing out of the cupola furnace into a rock wool centrifuge, and drawing the melt into rock wool fibers;
s3: collecting rock wool fibers by using a catching belt to form a rock wool felt, and spraying a phenolic resin adhesive to the rock wool felt, wherein the weight ratio of the phenolic resin adhesive to the rock wool felt is 100;
s4: according to the weight parts, 80 parts of polydimethylsiloxane, 12 parts of fumed silica, 18 parts of nano carbon black and 8 parts of curing agent are taken, the polydimethylsiloxane, the fumed silica and the curing agent are uniformly mixed by using a high-speed shearing dispersion machine and sprayed on the surface of the rock wool felt to form a layer of coating for fixing the carbon black, then the carbon black is uniformly sprayed on the coating by using a powder spraying machine, and the coating is baked at 80 ℃ for 10min to be cured to form a waterproof heat-insulating coating, wherein the total coating rate of the waterproof heat-insulating coating (containing the carbon black) is 110g/m 2 ；
The polydimethylsiloxane, the curing agent, the fumed silica and the nano carbon black are all commercially available products, wherein: the viscosity section of the polydimethylsiloxane is 800-1200 cp (25 ℃), the mesh number of the fumed silica is 1250 meshes, the average grain diameter of the nano carbon black is 25nm, the curing agent is a polydimethylsiloxane curing agent, and the curing agent and the used polydimethylsiloxane are purchased from Dow Corning company;
s5: conveying the baked rock wool felt to a pendulum bob machine through a conveyor for stacking, and conveying the stacked rock wool felt to a cotton pressing machine for pressing the rock wool felt after the stacking is finished to obtain a rock wool board;
s6: feeding the rock wool boards into a high-temperature curing furnace, curing at the high temperature of 200 ℃ for 30min, and cutting the rock wool boards into blocky rock wool boards after curing is finished;
s7: spraying a modifier on the surface of the cured rock wool board, standing for 20min, and drying again at the drying temperature of 80 ℃;
s8: and spraying inert silicone oil emulsion on the surface of the modified rock wool board, wherein the spraying thickness is 0.2mm, and drying at 120 ℃ to form a hydrophobic coating, thus obtaining the high-heat-preservation rock wool board.
In this example, the modifier used in step S7 was a dilute hydrochloric acid solution having a pH of 3.0, and was allowed to stand so that the modifier penetrated through the gaps between the rock wool fibers and entered the interior of the rock wool panel.
In order to test whether the waterproofness of the modified rock wool board is reduced or not, according to the method for testing the waterproofness, the contact angle of the surface of the high-heat-insulation rock wool board prepared in the embodiment is tested, the tested contact angle is 163 degrees, which is obviously higher than that of the embodiment 1, and is beyond expectation.
To investigate the cause of this phenomenon, the rock wool board prepared in step S6 of this example was modified with solutions of different pH, dried, sprayed with an inert silicone oil emulsion, and dried again, and the contact angle was measured as shown in the following table:
TABLE 3 influence of different pH solutions on the contact angle of rock wool panel surface
| Kind of solution | HCl | HCl | HCl | HCl | Deionized water |
| pH of the solution | 1.0 | 2.0 | 4.0 | 5.0 | 6.8 |
| Standing time/min | 20 | 20 | 20 | 20 | 20 |
| Contact Angle/° | 147 | 158 | 161 | 155 | 151 |
As can be seen from table 3, after treatment with HCl solution with pH between 2.0 and 5.0, the contact angle of the rock wool panel is significantly increased, but only increased insignificantly outside this range, and when the pH is decreased to 1.0, the contact angle of the rock wool panel is significantly decreased, and it is likely that a high-concentration acidic solution severely corrodes the rock wool fibers, thereby enhancing the water absorption.
In addition, the effect of other common types of acidic solutions (sulfuric acid, sulfurous acid, phosphoric acid, perchloric acid, hypochlorous acid, nitric acid) on the water repellency of rock wool panels was tested, wherein the aqueous solution of hypochlorous acid acted similarly to hydrochloric acid, while none of the other types of acidic solutions resulted in a significant increase in the contact angle of the rock wool panels.
Example 6
In order to eliminate the interference of the waterproof heat-insulating coating, in this embodiment, on the basis of example 5, step S4 is omitted, the rock wool board which is not sprayed with the waterproof heat-insulating coating is subjected to modification treatment, so as to test the waterproof performance improvement effect of the acidic solution modification on the ordinary rock wool board, and the average contact angle of the sample is 133 °, which is significantly higher than that of the comparative example, but lower than that of example 5.
Example 7
In this example, the effect of the standing time on the treatment effect was examined on the basis of example 5, as shown in table 4 below:
TABLE 4 Effect of the standing time on the modification treatment
| Kind of solution | HCl | HCl | HCl | HCl |
| pH of the solution | 3.0 | 3.0 | 3.0 | 3.0 |
| Standing time/min | 1 | 5 | 10 | 30 |
| Contact Angle/° | 153 | 155 | 159 | 161 |
As shown in Table 4, the treatment effect was best when the standing time was 10 to 20 minutes in combination with example 5.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a high heat preservation rock wool board, includes rock wool board and spraying in the hydrophobic coating on rock wool board surface, its characterized in that, the rock wool board is the S-shaped by the rock wool felt and piles up and suppress and form, rock wool felt surface spraying has waterproof insulation coating, waterproof insulation coating' S coating rate is 80 ~ 130g/m 2 The waterproof heat-insulation coating comprises the following raw materials in parts by weight: 70-90 parts of polydimethylsiloxane, 5-20 parts of fumed silica, 15-25 parts of nano carbon black and 6-11 parts of curing agent;
the waterproof heat-preservation coating is sprayed on the surface of the rock wool felt on a single side or a double side, and the spraying process is as follows:
uniformly mixing polydimethylsiloxane, fumed silica and a curing agent, spraying the mixture on the surface of the rock wool felt, then spraying nano carbon black, and drying and curing.
2. The high heat preservation rock wool board of claim 1, wherein the rock wool felt comprises the following raw materials in parts by weight: 100 parts of rock wool fiber and 4-10 parts of phenolic resin adhesive.
3. The high-heat-preservation rock wool board according to claim 1, wherein the surface of the rock wool board is modified by a modifier, and the modifier is an acidic solution with a pH value of 2.5-4.5.
4. The high-heat-preservation rock wool board according to claim 1, wherein the viscosity of said polydimethylsiloxane is 800-1200 cp (25 ℃), and the mesh number of said fumed silica is not less than 1250 mesh.
5. The high-heat-insulation rock wool board as claimed in claim 1, wherein said hydrophobic coating is an inert silicone oil emulsion coating.
6. The high-heat-preservation rock wool board according to claim 1, wherein the spraying thickness of the hydrophobic coating is 0.1-0.2 mm.
7. The high-heat-insulation rock wool board as claimed in claim 3, wherein said acid solution is an aqueous solution of hydrochloric acid or hypochlorous acid.
8. The production process of high heat preservation rock wool boards as claimed in any one of claims 1 to 6, comprising the following steps:
s1: adding the ore into a cupola furnace, and melting at 1450-1600 ℃;
s2: pouring the melt flowing out of the cupola into a rock wool centrifuge, and drawing the melt into rock wool fibers;
s3: collecting rock wool fibers by using a trapping belt to form a rock wool felt, and spraying a phenolic resin adhesive on the rock wool felt;
s4: uniformly spraying a waterproof heat-preservation coating on the surface of the rock wool felt, and then baking for 10-30 min at the temperature of 60-80 ℃;
s5: conveying the baked rock wool felt to a pendulum bob machine through a conveyor for stacking, and conveying the stacked rock wool felt to a cotton pressing machine for pressing the rock wool felt after the stacking is finished to obtain a rock wool board;
s6: sending the rock wool board into a high-temperature curing furnace, curing at 170-250 ℃ for more than 30min, and cutting the rock wool board into blocky rock wool boards after curing;
s7: and (3) spraying a hydrophobic coating on the surface of the rock wool board, and drying at the temperature of 80-120 ℃ to obtain the high-heat-preservation rock wool board.
9. The process for producing high-heat-preservation rock wool boards as claimed in claim 8, wherein the ore is prepared by crushing a mixture of basalt, dolomite, limestone and iron ore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211003655.5A CN115417589A (en) | 2022-08-20 | 2022-08-20 | High-heat-preservation rock wool board and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211003655.5A CN115417589A (en) | 2022-08-20 | 2022-08-20 | High-heat-preservation rock wool board and production process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115417589A true CN115417589A (en) | 2022-12-02 |
Family
ID=84198113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211003655.5A Pending CN115417589A (en) | 2022-08-20 | 2022-08-20 | High-heat-preservation rock wool board and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115417589A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012090566A1 (en) * | 2010-12-27 | 2012-07-05 | 旭化成ケミカルズ株式会社 | Heat insulation material and production method for same |
| CN106639011A (en) * | 2016-10-31 | 2017-05-10 | 马鞍山市宏达保温材料有限公司 | High-waterproofness heat preservation rock wool board and manufacturing method thereof |
| CN107419534A (en) * | 2017-06-29 | 2017-12-01 | 东南大学 | A kind of superhydrophobic fibers felt and preparation method thereof |
| CN111559883A (en) * | 2020-06-15 | 2020-08-21 | 万华建筑科技（烟台）有限公司 | Preparation method of silica aerogel modified rock wool board |
| WO2021069351A1 (en) * | 2019-10-07 | 2021-04-15 | Evonik Operations Gmbh | Silica-based thermal-insulation sheet coated with intumescent composition |
| CN114656807A (en) * | 2022-04-22 | 2022-06-24 | 青岛黑猫新材料研究院有限公司 | Process method for improving wear resistance of carbon black |
| CN114908559A (en) * | 2022-06-24 | 2022-08-16 | 启东金昱纺织科技有限公司 | Super-hydrophobic cotton-linen textile fabric and preparation method thereof |
-
2022
- 2022-08-20 CN CN202211003655.5A patent/CN115417589A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012090566A1 (en) * | 2010-12-27 | 2012-07-05 | 旭化成ケミカルズ株式会社 | Heat insulation material and production method for same |
| CN106639011A (en) * | 2016-10-31 | 2017-05-10 | 马鞍山市宏达保温材料有限公司 | High-waterproofness heat preservation rock wool board and manufacturing method thereof |
| CN107419534A (en) * | 2017-06-29 | 2017-12-01 | 东南大学 | A kind of superhydrophobic fibers felt and preparation method thereof |
| WO2021069351A1 (en) * | 2019-10-07 | 2021-04-15 | Evonik Operations Gmbh | Silica-based thermal-insulation sheet coated with intumescent composition |
| CN111559883A (en) * | 2020-06-15 | 2020-08-21 | 万华建筑科技（烟台）有限公司 | Preparation method of silica aerogel modified rock wool board |
| CN114656807A (en) * | 2022-04-22 | 2022-06-24 | 青岛黑猫新材料研究院有限公司 | Process method for improving wear resistance of carbon black |
| CN114908559A (en) * | 2022-06-24 | 2022-08-16 | 启东金昱纺织科技有限公司 | Super-hydrophobic cotton-linen textile fabric and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 田海平: "《壁湍流相干结构及超疏水壁面减阻机理》", 黄河水利出版社, pages: 316 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11808032B2 (en) | Composite insulation including an inorganic aerogel and a melamine foam | |
| Sassoni et al. | Novel sustainable hemp-based composites for application in the building industry: Physical, thermal and mechanical characterization | |
| CN106316329B (en) | A kind of inorganic foamed insulating board for building and preparation method thereof | |
| EP2864535B1 (en) | Flexible insulating structures and methods of making and using same | |
| EP2588517B1 (en) | Inorganic nanoporous particles with water dispersible polyurethane binder | |
| CN107263948B (en) | A kind of fire-proof thermal-insulation decoration and preparation method thereof | |
| CN103233524B (en) | A kind of composite fireproof heat preservation board of being made up of organic-inorganic light aggregate raw material and preparation technology | |
| CN102924037B (en) | Fire protection insulation board for building outer wall and method for producing fire protection insulation board | |
| CN112252495A (en) | High-waterproofness heat-preservation rock wool board and manufacturing method thereof | |
| CN111574111A (en) | Light high-strength straw board for interior wall and preparation method and application thereof | |
| CN106280641B (en) | A kind of tunnel fireproof coating and preparation method thereof | |
| Balaji et al. | Aerogels as alternatives for thermal insulation in buildings–A comparative teeny review | |
| CN102887667B (en) | Inorganic fibre fireproof insulation board | |
| CN102400530A (en) | Low-carbon fireproof thermal insulation decoration integrated board and preparation method thereof | |
| CN105348726A (en) | Method for manufacturing pressure-proof, warping-resistant, hydrophobic, flame-resistant and thermal-insulated foam material | |
| CN105924103B (en) | A kind of modified expanded perlite insulation board and its production method | |
| CN106082780A (en) | Nano silica sol modified low-density warming plate and preparation method thereof | |
| CN113858719A (en) | Composite heat-insulation flexible facing sheet for building wall and processing technology and application thereof | |
| CN105735500A (en) | Non-woven silicon-aluminum aerogel compound sandwich insulating fireproof board | |
| CN103274756A (en) | Micro-powder bubble cement fireproofing insulation board and production process thereof | |
| CN115417589A (en) | High-heat-preservation rock wool board and production process thereof | |
| CN103711210B (en) | A kind of preparation method of the flame retardant type waterproof ventilated membrane for the outer insulation of curtain wall | |
| CN103710983A (en) | Preparation method for waterproof and breathable glass wool board | |
| CN205444519U (en) | Novel thermal insulation board | |
| CN107443824A (en) | A kind of modified rock cotton board and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |