CN114161805A - Preparation method of polymer waterproof type cement-based cloth composite hard polyurethane insulation board - Google Patents
Preparation method of polymer waterproof type cement-based cloth composite hard polyurethane insulation board Download PDFInfo
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- CN114161805A CN114161805A CN202111484692.8A CN202111484692A CN114161805A CN 114161805 A CN114161805 A CN 114161805A CN 202111484692 A CN202111484692 A CN 202111484692A CN 114161805 A CN114161805 A CN 114161805A
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- cement
- polymer waterproof
- polymer
- insulation board
- polyurethane
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- 239000004568 cement Substances 0.000 title claims abstract description 53
- 229920000642 polymer Polymers 0.000 title claims abstract description 48
- 239000004744 fabric Substances 0.000 title claims abstract description 42
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 41
- 239000004814 polyurethane Substances 0.000 title claims abstract description 41
- 238000009413 insulation Methods 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000001723 curing Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000077 silane Inorganic materials 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000003365 glass fiber Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 6
- 238000002425 crystallisation Methods 0.000 claims abstract description 5
- 230000008025 crystallization Effects 0.000 claims abstract description 5
- 238000005187 foaming Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 239000011083 cement mortar Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- ALVYUZIFSCKIFP-UHFFFAOYSA-N triethoxy(2-methylpropyl)silane Chemical group CCO[Si](CC(C)C)(OCC)OCC ALVYUZIFSCKIFP-UHFFFAOYSA-N 0.000 claims description 3
- 229920001688 coating polymer Polymers 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract description 16
- 238000004321 preservation Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract description 2
- 239000002344 surface layer Substances 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 3
- 230000007547 defect Effects 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 208000034656 Contusions Diseases 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 208000034526 bruise Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000009746 freeze damage Effects 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 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
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- -1 polysiloxane Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/365—Coating
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
- C09D1/08—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement with organic additives
-
- 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
- C09D7/63—Additives non-macromolecular organic
-
- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B32B2307/00—Properties of the layers or laminate
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/73—Hydrophobic
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/0037—Materials containing oriented fillers or elements
- C04B2111/00379—Materials containing oriented fillers or elements the oriented elements being fibres
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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Abstract
The invention relates to the technical field of tunnel heat preservation in cold regions, and discloses a preparation method of a polymer waterproof type cement-based cloth composite rigid polyurethane heat preservation plate, wherein polymer waterproof type cement slurry is coated on the surface of alkali-free glass fiber mesh cloth; and then pouring polyurethane black and white materials between the two layers of waterproof cement-based cloth, foaming and curing to obtain the polymer waterproof cement-based cloth composite rigid polyurethane insulation board, wherein the polymer waterproof cement paste is prepared by adding certain water, acrylic polymer, silane impregnant and permeable crystallization waterproof coating in the cement mixing process and mixing. The preparation method of the polymer waterproof type cement-based cloth composite rigid polyurethane insulation board is simple in production flow operation, has the effects of fire prevention, flame retardance, water prevention, seepage prevention and protection of the surface layer of the polyurethane insulation board, obviously prolongs the service life of the polyurethane insulation board, and simplifies part of construction procedures of a tunnel insulation layer in a cold region by compounding waterproof measures on the insulation board.
Description
Technical Field
The invention relates to the technical field of cold region tunnel heat insulation, in particular to a preparation method of a polymer waterproof type cement-based cloth composite rigid polyurethane heat insulation board.
Background
The tunnel construction in severe cold district needs to set up heat preservation and waterproof layer in order to prevent because of the various freeze injury that infiltration, ponding lead to between first support and two linings, for example the frost heaving can let the volume increase 9% of ponding give tunnel support huge pressure, changes the stress environment in tunnel, endangers the stability and the security in tunnel.
The existing heat preservation layer commonly used rigid polyurethane closed-cell foam heat preservation plate is easy to collide with and cause breakage and bruise in the process of getting on or off the vehicle or transporting and installing, the steam permeability of the heat preservation layer used as a heat preservation material is 3 percent, namely under the humid condition, the water absorption rate is 3 percent, when the heat preservation layer is used in a cold area, the frost heaving happens when the medium temperature is lower than 0 ℃, and the heat preservation structure can be irreversibly damaged after the frost heaving because the compression strength of the heat preservation layer is low, thereby influencing the heat preservation effect. If the cyclic frost heaving of the tunnel is carried out for several years, the heat insulation effect is damaged completely, so that the polymer waterproof type cement-based cloth composite hard polyurethane heat insulation plate for tunnel heat insulation waterproof construction is urgently needed to be provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a polymer waterproof type cement-based cloth composite hard polyurethane insulation board and a preparation method thereof, and solves the problems that the existing insulation board for the tunnel is easy to damage, loses the insulation effect due to water seepage and has short service life in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a preparation method of a polymer waterproof type cement-based cloth composite rigid polyurethane insulation board specifically comprises the following steps:
(1) uniformly coating polymer waterproof cement mortar on the surface of the alkali-free glass fiber mesh fabric, and drying and curing to obtain polymer waterproof cement base fabric;
(2) fixedly mounting the polymer waterproof type cement-based cloth prepared in the step (1) into the upper end and the lower end of a production line machine head respectively, drawing the cloth to an oven, reserving a heat-insulating layer placing space between the two layers, injecting polyurethane black and white materials between the two layers of polymer waterproof type cement-based cloth by a special casting machine, foaming, curing and molding to obtain a polyurethane heat-insulating plate, spraying polymer waterproof type cement mortar on four side surfaces of the polyurethane heat-insulating plate, drying and curing to form an independent waterproof type monomer-polymer waterproof type cement-based cloth composite hard polyurethane heat-insulating plate for each heat-insulating plate;
the polymer waterproof cement mortar is prepared by the following method:
uniformly mixing 3-8 parts by weight of cement-based permeable crystallization waterproof coating, 5-20 parts by weight of cement, 60-120 parts by weight of water, 1-10 parts by weight of acrylic polymer and 0.1-1 part by weight of silane impregnant.
Further, the cement is 425# Portland cement; the silane impregnant is isobutyl triethoxy silane impregnant; the acrylic polymer is polyacrylic acid.
Further, the polymer waterproof cement mortar is prepared by the following method:
4.7 parts by weight of cement-based permeable crystalline waterproof coating, 12 parts by weight of cement, 80 parts by weight of water, 3 parts by weight of acrylic polymer and 0.3 part by weight of silane impregnant are mixed in a polymer waterproof cement mortar pool for 10 minutes to obtain the polymer waterproof cement mortar.
Further, the polyurethane black and white material is obtained by uniformly mixing the polyurethane rigid foam combined polyether and the polymeric MDI according to the mass ratio of 1: 1.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. according to the invention, the polymer waterproof type cement-based cloth is used as the protective layer of the insulation board, so that the surface strength of the insulation board can be obviously increased, and the surface layer of the insulation board is prevented from being damaged by foreign matters; the insulation board is easy to collide in the processes of getting on or off the vehicle or transporting and installing the insulation board, so that the fracture and the bruise are caused, and the polymer waterproof type cement base cloth can be compounded to prevent the collision and the fracture; the polymer waterproof type cement base cloth is formed by compounding non-combustible material cement and alkali-free glass fiber mesh cloth, and after being compounded with the heat insulation plate, the polymer waterproof type cement base cloth can block a fire source from igniting flammable heat insulation combustion, and has fireproof and flame-retardant effects.
2. The cement-based permeable crystallization waterproof coating is an active substance with a molecular structure of active silicon, has small molecular weight, contains hydrophobic molecules, is soluble in water, can be subjected to condensation polymerization crystallization in a humid environment, can well fill defects and gaps in a cement base, has good impermeability, achieves a good waterproof effect, makes up the defect that a cement-based alkali-free glass fiber mesh fabric cannot be waterproof, and enables water vapor to not permeate into a polyurethane insulation board; after the film-forming agent is added into the polymer acrylic acid, a high-molecular waterproof coating is synthesized, has high freeze-thaw stability and high film-forming stability, and can play a good waterproof role and a good freeze-thaw resistance stabilizing role when being coated on the surface of a cement-based structure; the silane impregnation is a penetrating impregnant with excellent performance, has a small molecular structure, deeply penetrates the capillary hole wall of the concrete to react with hydrated cement to form a polysiloxane interpenetrating network structure, endows the microstructure on the surface of the concrete with long-term hydrophobicity through firm chemical bonding reaction, keeps the function of breathing and ventilation, greatly reduces the invasion of water, harmful chloride ions and the like, and ensures that the concrete structure is prevented from being corroded. When the freeze thawing occurs, the water vapor can not damage the heat insulation structure of the heat insulation plate, so that the heat insulation plate continuously generates a heat insulation effect, and the safety of the cold area tunnel is protected.
3. The preparation method disclosed by the invention is reasonable in formula and simple to operate, the alkali-free glass fiber mesh cloth is compounded with the polymer waterproof cement mortar and compounded on the rigid polyurethane insulation board, so that fireproof, waterproof and breakage-proof multidirectional protection is provided for the polyurethane insulation board, the service life of the insulation board is obviously prolonged, the occurrence of cold region tunnel freeze injury is effectively prevented, the defects of frost heaving deformation failure and short service life of the traditional insulation board are avoided, and the construction is easy.
Drawings
FIG. 1 is a schematic view of the composition of a polyurethane board and a polymer waterproof cement-based fabric according to the present invention, wherein the 1-polyurethane insulation board; 2-polymer waterproof cement-based cloth.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, which are not intended to limit the scope of the invention.
As shown in fig. 1, the polymer waterproof type cement-based cloth composite rigid polyurethane insulation board comprises a polyurethane insulation board 1 and polymer waterproof type cement-based cloth 2 positioned on the upper surface and the lower surface of the polyurethane insulation board, and the preparation method of the polymer waterproof type cement-based cloth composite rigid polyurethane insulation board specifically comprises the following steps:
(1) the polymer waterproof cement mortar is injected into a cement mortar pool, cement mortar is obtained through vibration, the cement mortar is evenly paved on a conveying belt, the conveying belt which is fully paved with the cement mortar is continuously pushed through traction, the alkali-free glass fiber gridding cloth is pressed on the conveying belt which is fully paved with the cement mortar through a roller press, the conveying belt is pulled into a drying oven, the drying and curing are carried out for 10 minutes, and the polymer waterproof cement base cloth 2 is obtained through rewinding and bundling.
(2) The method comprises the following steps of (1) respectively and fixedly installing two bundles of polymer waterproof type cement-based cloth 2 packaged in bundles prepared in the step (1) to the upper end and the lower end of a machine head of a production line, dividing the two bundles into an upper layer and a lower layer, drawing the two layers to an oven, reserving a heat preservation layer placing space between the two layers, injecting polyurethane black and white materials between the two layers of polymer waterproof type cement-based cloth by a special casting machine, foaming, curing and forming to obtain a polyurethane heat preservation plate 1, spraying polymer waterproof type cement mortar on four exposed side surfaces of the polyurethane heat preservation plate, drying and curing to enable each heat preservation plate to form an independent waterproof type monomer-polymer waterproof type cement-based cloth composite hard polyurethane heat preservation plate.
The prepared insulation board is detected to have the thermal conductivity coefficient of 0.024w/m.k and the water absorption of 0%.
The polymer waterproof cement mortar is prepared by the following method:
4.7 parts of cement-based permeable crystalline waterproof coating (Liwei LV-5), 12 parts of 425# Portland cement, 80 parts of water, 3 parts of polyacrylic acid and 0.3 part of silane impregnant (isobutyl triethoxy silane impregnant) are mixed in a polymer waterproof cement slurry pool for 10 minutes to obtain the polymer waterproof cement slurry.
The polyurethane black and white material is obtained by mixing polyurethane rigid foam combined polyether and polymeric MDI according to the mass ratio of 1: 1.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (3)
1. A preparation method of a polymer waterproof type cement-based cloth composite hard polyurethane insulation board is characterized by comprising the following steps: the preparation method comprises the following steps:
(1) uniformly coating polymer waterproof cement mortar on the surface of the alkali-free glass fiber mesh fabric, and drying and curing to obtain polymer waterproof cement base fabric;
(2) fixedly mounting the polymer waterproof type cement-based cloth prepared in the step (1) into the upper end and the lower end of a machine head of a production line respectively through an upper layer and a lower layer, drawing the cloth to an oven, reserving a heat-insulating layer placing space between the two layers of polymer waterproof type cement-based cloth, injecting polyurethane black and white materials between the two layers of polymer waterproof type cement-based cloth through a special casting machine, foaming, curing and molding to obtain a polyurethane heat-insulating plate, spraying polymer waterproof type cement mortar on four side surfaces of the polyurethane heat-insulating plate, drying and curing to obtain the polymer waterproof type cement-based cloth composite rigid polyurethane heat-insulating plate;
the polymer waterproof cement mortar is prepared by the following method:
uniformly mixing 3-8 parts by weight of cement-based permeable crystallization waterproof coating, 5-20 parts by weight of cement, 60-120 parts by weight of water, 1-10 parts by weight of acrylic polymer and 0.1-1 part by weight of silane impregnant.
2. The method of claim 1, wherein: the cement is 425# Portland cement; the silane impregnant is isobutyl triethoxy silane impregnant; the acrylic polymer is polyacrylic acid.
3. The method of claim 1, wherein: the polyurethane black and white material is obtained by uniformly mixing polyurethane rigid foam combined polyether and polymeric MDI according to the mass ratio of 1: 1.
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