CN111621223A - High-solid-content environment-friendly polyurethane waterproof coating and preparation method thereof - Google Patents
High-solid-content environment-friendly polyurethane waterproof coating and preparation method thereof Download PDFInfo
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- CN111621223A CN111621223A CN202010576744.3A CN202010576744A CN111621223A CN 111621223 A CN111621223 A CN 111621223A CN 202010576744 A CN202010576744 A CN 202010576744A CN 111621223 A CN111621223 A CN 111621223A
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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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
- 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
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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
- 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
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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Abstract
The invention relates to a high-solid-content environment-friendly polyurethane waterproof coating which is mainly prepared from the following components in parts by weight: 5.7-10.6 parts of isocyanate, 35.0-60.0 parts of polyether polyol, 8.0-18.0 parts of plasticizer, 3.0-5.0 parts of titanium dioxide, 16.0-25.0 parts of talcum powder, 3.0-18.0 parts of heavy calcium carbonate, 2.0-7.0 parts of calcined kaolin, 0.05-0.3 part of catalyst, 0.8-1.3 parts of latent curing agent, 0.05-0.13 part of stabilizer, 0.03-0.06 part of dispersing agent and 0.05-1.0 part of fumed silica. The polyurethane waterproof coating can reduce the addition of solvent in a coating system under the condition of not adding an organic solvent or a diluent, and achieves the aim of high solid content and environmental protection of a product.
Description
Technical Field
The invention relates to a single-component polyurethane waterproof coating and a preparation method thereof, in particular to a high-solid-content environment-friendly polyurethane waterproof coating and a preparation method thereof.
Background
The polyurethane waterproof coating has excellent tensile and twisting resistance, excellent stress shrinkage resistance on a base surface, and excellent chemical medium corrosion resistance and water resistance.
The polyurethane waterproof coating contains a certain amount of benzene, toluene and xylene solvents, the solid content of the commercial product is generally between 82 and 95 percent, and volatile components also contain a certain amount of free TDI, so that the polyurethane waterproof coating has great damage to human bodies.
In the construction process, a large amount of toluene, xylene, gasoline or ketone solvents exist in construction sites, toxic and harmful gases are seriously exceeded in the construction sites, and constructors are poisoned, died or injured, and the events are rare.
The national successive policy increases the control force of solvent-based products, and the policy guides the gradual development of solvent-free high-solid-content high-performance products.
In conclusion, the high-solid-content environment-friendly polyurethane waterproof coating becomes a product urgently needed by the market, and the development and research of the product are carried out.
Disclosure of Invention
The invention provides a high-solid-content environment-friendly polyurethane waterproof coating and a preparation method thereof.
The invention is realized by the following technical scheme:
one) scheme I
The high-solid-content environment-friendly polyurethane waterproof coating is mainly prepared from the following components in parts by weight:
furthermore, the isocyanate is formed by mixing one or more than two of TDI, MDI or PAPI according to any proportion. The TDI is toluene diisocyanate (tolumen diisocynate); the MDI is diphenylmethane diisocyanate (4, 4' -diphenylmethyl diisocyanate); the PAPI is polymethylene polyphenyl isocyanate (polymethylene polyphenylisocyanate).
The polyether polyol is prepared by mixing one or more of polyoxypropylene glycol, glyceryl oxypropylene polyether triol and polytetrahydrofuran ether glycol in any proportion. Polyoxypropylene diol (polyoxypropylene glycol 1000), molecular weight 1000; polyoxypropylene diol (polyoxypropylene glycol 2000), molecular weight 2000; glycerol propylene oxide polyether triol (Glycerol propylene oxide polyether triol330N)
Polytetrahydrofuran ether glycol (Polytetrahydrofuran ether glycol)
Furthermore, the plasticizer is one or more of DINP, DOTP, DIDP and DINCH mixed according to any proportion.
DINP is diisononyl phthalate (diisononyl phthalate); DOTP is dioctyl terephthalate (dioctyl terephthalate); DIDP is diisodecyl phthalate (diisodecyl phthalate); DINCH is cyclohexane 1, 2-dicarboxylic acid Diisononyl ester (Diisononyl cyclohexane 1, 2-diformate).
Further, the titanium dioxide is rutile type titanium dioxide.
Furthermore, the mesh number of the talcum powder is 800-2000 meshes.
Furthermore, the mesh number of the coarse whiting is 800-2000 meshes
Furthermore, the mesh number of the calcined kaolin is 1000-2000 meshes.
Further, the dispersant is an oily dispersant.
Further, the fumed silica is oleophilic fumed silica.
Further, the catalyst is mainly dibutyltin dilaurate or bismuth isooctanoate.
Further, the latent curing agent is ketimine, aldimine or urethane dioxazolidine.
Further, the stabilizer is organic weak acid: salicylic acid, oxalic acid or benzoic acid.
Scheme two)
A preparation method of high-solid-content environment-friendly polyurethane waterproof paint comprises the following steps:
adding polyether polyol, a plasticizer and a dispersing agent into a reaction kettle, setting a stirring speed of 200 plus materials for 600 revolutions per minute, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium, calcined kaolin and fumed silica after the temperature of the reaction kettle rises to 70-80 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 115-125 ℃, continuously vacuumizing the reaction kettle for 2-5 hours at a vacuum degree of-0.095-0.1 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 45-55 ℃, adding isocyanate, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 55-65 ℃, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 65-75 ℃, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 75-85 ℃, and keeping the temperature for 1-2 hours;
then adding a catalyst at 75-85 ℃, and keeping the temperature for 1-2 hours;
and then sequentially adding a latent curing agent and a stabilizing agent at 75-85 ℃, keeping the temperature for 50-100 minutes, detecting whether the percentage content of free TDI is lower than 0.3% in the constant temperature process, opening the vacuum connected with the reaction kettle and continuously vacuumizing for 20-40 minutes under the vacuum degree of-0.095-0.1 MPa after the percentage content of the detected free TDI is lower than 0.3%, gradually reducing the stirring speed to be static, and finally standing for 5-10 minutes to obtain the catalyst.
Compared with the prior art, the invention has the following beneficial effects: the polyurethane waterproof coating disclosed by the invention can reduce the addition amount of a solvent in a coating system under the condition of not adding an organic solvent or a diluent, so that the purposes of high solid content and environmental protection of a product are achieved, the construction applicability of the product is improved, the harm of the solvent to the occupational health of construction workers and field managers in the construction application process is reduced, and the harm to the occupational health of industrial workers in the production process is reduced. The coating has good construction performance and anti-sagging performance in the construction process.
Compared with the technical standard of polyurethane, the solid content of the invention is at least 14.6% higher than that of single-component polyurethane and at least 7.6% higher than that of double-component polyurethane. The invention does not contain volatile organic solvent, and does not need to add organic solvent contained in the commercial single-component polyurethane waterproof coating product, such as benzene series, ketone, ether, ester and other organic solvents. The invention has no detection of the limited quantity of harmful substances such as benzene, toluene, ethylbenzene, xylene, phenol, anthracene, naphthalene and the like.
Detailed Description
The invention is further illustrated by the following specific examples.
The abbreviations and trade names of the chemical materials used in the following examples are as follows:
isocyanates
TDI toluene diisocyanate (tolumen di isocyanate);
MDI diphenylmethane diisocyanate (4, 4' -diphenylmethyl diisocyanate);
PAPI polymethylene polyphenyl isocyanate (polymethylene polyisocyanate);
polyether polyols
N210 polyoxypropylene diol (polyoxypropylene glycol 1000), molecular weight 1000;
n220 polyoxypropylene diol (polyoxypropylene glycol 2000), molecular weight 2000;
330N Glycerol propylene oxide polyether triol (Glycerol propylene oxide polyether triol330N)
PTMG Polytetrahydrofuran ether glycol (Polytetrahydrofuran ether glycol)
Plasticizer
DINP (diisononyl phthalate);
DOTP dioctyl terephthalate (dioctyl terephthalate);
DIDP diisodecyl phthalate (diisodecyl phthalate);
diisononyl cyclohexane 1, 2-dicarboxylate (Diisononyl cyclohexoxane 1, 2-diformate).
800-2000 meshes of talcum powder (talcum powder)
Calcined kaolin (calcined kaolin) 1000-2000 mesh
Titanium dioxide (Titanium dioxide) rutile type Titanium dioxide
Calcium carbonate (Calcium carbonate) 800-2000 mesh
The catalyst is dibutyltin dilaurate or bismuth isooctanoate
The latent curing agent is ketimine, aldimine or urethane dioxazolidine
The stabilizer is organic weak acid: salicylic, oxalic or benzoic acids
The dispersant is a wetting dispersant for a solvent system, preferably a German BYK dispersant BYK-P104S.
The gas-phase silicon dioxide is lipophilic gas-phase silicon dioxide.
The dispersant is an oily dispersant. In the dispersing agent, the solute is a copolymer of a low molecular weight unsaturated polycarboxylic acid polymer and polysiloxane, the solvent is xylene/diisobutyl ketone, and the dosage of the auxiliary agent is 0.5-2.5% of non-volatile part and 50%.
Example 1
The high-solid-content environment-friendly polyurethane waterproof coating is mainly prepared from the following components in parts by weight:
adding polyether polyol, a plasticizer and a dispersing agent into a reaction kettle, setting the stirring speed to be 200 revolutions per minute, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium, calcined kaolin and gas-phase silica when the temperature of the reaction kettle rises to 70 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 115 ℃, continuously vacuumizing the reaction kettle for 2 hours at the vacuum degree of-0.095 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 50 ℃, adding isocyanate and keeping the temperature constant for 1 hour;
then heating to 60 ℃ and keeping the temperature for 1 hour;
heating to 70 ℃ and keeping the temperature for 1 hour;
heating to 80 deg.C and holding for 1 hr;
then adding a catalyst at 80 ℃ and keeping the temperature for 1 hour;
and then sequentially adding the latent curing agent and the stabilizing agent at the temperature of 80 ℃, keeping the temperature for 50 minutes, opening a vacuum pump connected with the reaction kettle to pump vacuum, continuously pumping vacuum for 20 minutes between the vacuum degree of-0.095 MPa, gradually reducing the stirring speed to be static, and finally standing for 5 minutes to obtain the epoxy resin. Discharging and packaging, and filling nitrogen into a packaging barrel for protection.
Example 2
The high-solid-content environment-friendly polyurethane waterproof coating is mainly prepared from the following components in parts by weight:
adding polyether polyol, a plasticizer and a dispersing agent into a reaction kettle, setting the stirring speed to be 300 r/min, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium, calcined kaolin and gas-phase silica after the temperature of the reaction kettle rises to 80 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 125 ℃, continuously vacuumizing the reaction kettle for 2 hours under the vacuum degree of-0.1 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 45 ℃, adding isocyanate and keeping the temperature for 2 hours;
then heating to 55 ℃ and keeping the temperature for 2 hours;
heating to 65 ℃ and keeping the temperature for 2 hours;
heating to 75 deg.C and holding for 2 hr;
then adding a catalyst at 85 ℃ and keeping the temperature for 2 hours;
and then sequentially adding the latent curing agent and the stabilizing agent at 85 ℃, keeping the temperature for 50 minutes, opening a vacuum pump connected with the reaction kettle to pump vacuum, continuously pumping vacuum for 25 minutes between the vacuum degree and 0.097MPa, gradually reducing the stirring speed to be static, and finally standing for 7 minutes to obtain the epoxy resin.
Example 3
The high-solid-content environment-friendly polyurethane waterproof coating is mainly prepared from the following components in parts by weight:
adding polyether polyol, a plasticizer and a dispersing agent into a reaction kettle, setting the stirring speed to be 400 rpm, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium, calcined kaolin and gas-phase silica after the temperature of the reaction kettle rises to 75 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 120 ℃, continuously vacuumizing the reaction kettle for 5 hours at the vacuum degree of-0.096 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 55 ℃, adding isocyanate, and keeping the temperature for 1 hour;
then heating to 65 ℃ and keeping the temperature for 1 hour;
heating to 75 deg.C and holding for 1 hr;
heating to 85 deg.C and holding for 1 hr;
then adding a catalyst at 85 ℃ and keeping the temperature for 1 hour;
and then sequentially adding a latent curing agent and a stabilizing agent at 85 ℃, keeping the temperature for 100 minutes until the percentage content of the detected free TDI is lower than 0.3%, opening a vacuum pump connected with the reaction kettle for vacuum pumping, continuously pumping vacuum for 30 minutes between the vacuum degree of-0.096 MPa, gradually reducing the stirring speed to be static, and finally standing for 6 minutes to obtain the catalyst.
Example 4
The high-solid-content environment-friendly polyurethane waterproof coating is mainly prepared from the following components in parts by weight:
adding polyether polyol, a plasticizer and a dispersing agent into a reaction kettle, setting a stirring speed to be 500 rpm, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium, calcined kaolin and gas-phase silica when the temperature of the reaction kettle rises to 76 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 121 ℃, continuously vacuumizing the reaction kettle for 3 hours at a vacuum degree of-0.097 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 50 ℃, adding isocyanate and keeping the temperature constant for 1 hour;
then heating to 60 ℃ and keeping the temperature for 1 hour;
heating to 70 ℃ and keeping the temperature for 1 hour;
heating to 80 deg.C and holding for 1 hr;
then adding a catalyst at 80 ℃ and keeping the temperature for 1 hour;
and then sequentially adding a latent curing agent and a stabilizing agent at the temperature of 80 ℃, keeping the temperature for 60 minutes until the percentage content of the detected free TDI is lower than 0.3%, opening a vacuum pump connected with the reaction kettle for vacuum pumping, continuously pumping vacuum for 30 minutes at the vacuum degree of-0.097 MPa, gradually reducing the stirring speed to be static, and finally standing for 6 minutes to obtain the high-performance TDI.
Discharging and packaging, and filling nitrogen into a packaging barrel for protection.
Example 5
The high-solid-content environment-friendly polyurethane waterproof coating is mainly prepared from the following components in parts by weight:
adding polyether polyol, a plasticizer and a dispersing agent into a reaction kettle, setting a stirring speed to be 600 revolutions per minute, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium, calcined kaolin and gas-phase silica after the temperature of the reaction kettle rises to 75 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 120 ℃, continuously vacuumizing the reaction kettle for 4 hours at a vacuum degree of-0.099 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 50 ℃, adding isocyanate and keeping the temperature constant for 1 hour;
then heating to 60 ℃ and keeping the temperature for 1 hour;
heating to 70 ℃ and keeping the temperature for 1 hour;
heating to 80 deg.C and holding for 1 hr;
then adding a catalyst at 80 ℃ and keeping the temperature for 1 hour;
and then sequentially adding a latent curing agent and a stabilizing agent at the temperature of 80 ℃, keeping the temperature for 50 minutes until the percentage content of the detected free TDI is lower than 0.3%, opening a vacuum pump connected with the reaction kettle for vacuum pumping, continuously pumping vacuum for 40 minutes at the vacuum degree of-0.1 MPa, gradually reducing the stirring speed to be static, and finally standing for 10 minutes to obtain the catalyst.
Example 6
The high-solid-content environment-friendly polyurethane waterproof coating is mainly prepared from the following components in parts by weight:
adding polyether polyol, a plasticizer and a dispersing agent into a reaction kettle, setting the stirring speed to be 550 rpm, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium, calcined kaolin and gas-phase silica after the temperature of the reaction kettle rises to 78 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 123 ℃, continuously vacuumizing the reaction kettle for 4 hours under the vacuum degree of-0.095 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 50 ℃, adding isocyanate and keeping the temperature constant for 1 hour;
then heating to 60 ℃ and keeping the temperature for 1 hour;
heating to 70 ℃ and keeping the temperature for 1 hour;
heating to 80 deg.C and holding for 1 hr;
then adding a catalyst at 80 ℃ and keeping the temperature for 1 hour;
and then sequentially adding a latent curing agent and a stabilizing agent at the temperature of 80 ℃, keeping the temperature for 50 minutes until the percentage content of the detected free TDI is lower than 0.3%, opening a vacuum pump connected with the reaction kettle for vacuum pumping, continuously pumping for 20 minutes under the vacuum degree of-0.095 MPa, gradually reducing the stirring speed to be static, and finally standing for 5 minutes to obtain the high-performance TDI.
As shown in the following table, compared with the technical standard of polyurethane, the solid content of the waterproof coating is 14.6% higher than that of single-component polyurethane and 7.6% higher than that of double-component polyurethane, and most of the waterproof coatings sold in the market at present range from 85% to 90%. The polyurethane coating does not contain volatile organic solvent, does not add organic solvent contained in a commercial single-component polyurethane waterproof coating product, such as solvent naphtha, benzene, toluene, ethylbenzene, xylene and other benzene solvents, ketone, ether, ester and other organic solvents, but is not limited to only containing such solvents. The invention has no detection of the limited quantity of harmful substances such as benzene, toluene, ethylbenzene, xylene, phenol, anthracene, naphthalene and the like. The coating has good construction performance and anti-sagging performance in the construction process.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. The high-solid-content environment-friendly polyurethane waterproof coating is characterized by being mainly prepared from the following components in parts by weight:
2. the high-solid-content environment-friendly polyurethane waterproof coating material as claimed in claim 1, wherein: the isocyanate is formed by mixing one or more than two of TDI, MDI or PAPI according to any proportion.
3. The high-solid-content environment-friendly polyurethane waterproof coating material as claimed in claim 1, wherein: the polyether polyol is prepared by mixing one or more of polyoxypropylene glycol, glyceryl oxypropylene polyether triol and polytetrahydrofuran ether glycol in any proportion.
4. The high-solid-content environment-friendly polyurethane waterproof coating material as claimed in claim 1, wherein: the plasticizer is one or more of DINP, DOTP, DIDP and DINCH mixed according to any proportion.
5. The high-solid-content environment-friendly polyurethane waterproof coating as claimed in claim 1, wherein: the titanium dioxide is rutile type titanium dioxide.
6. The high-solid-content environment-friendly polyurethane waterproof coating material as claimed in claim 1, wherein: the mesh number of the talcum powder is 800-2000 meshes; the mesh number of the coarse whiting is 800-2000 meshes; the mesh number of the calcined kaolin is 1000-2000 meshes.
7. The high-solid-content environment-friendly polyurethane waterproof coating as claimed in claim 1, wherein: the dispersant is an oily dispersant.
8. The high-solid-content environment-friendly polyurethane waterproof coating material as claimed in claim 1, wherein: the gas-phase silicon dioxide is lipophilic gas-phase silicon dioxide; the catalyst is dibutyltin dilaurate or bismuth isooctanoate; the latent curing agent is ketimine, aldimine or urethane dioxazolidine; the stabilizer is salicylic acid, oxalic acid or benzoic acid.
9. The preparation method of the high-solid-content environment-friendly polyurethane waterproof coating material as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
adding polyether polyol, a plasticizer and a dispersing agent into a reaction kettle, setting a stirring speed of 200 plus materials for 600 revolutions per minute, heating the reaction kettle, sequentially adding titanium dioxide, talcum powder, heavy calcium, calcined kaolin and fumed silica after the temperature of the reaction kettle rises to 70-80 ℃, opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle when the temperature of the reaction kettle rises to 115-125 ℃, continuously vacuumizing the reaction kettle for 2-5 hours at a vacuum degree of-0.095-0.1 MPa, and then closing the vacuum pump;
then cooling the temperature of the reaction kettle to 45-55 ℃, adding isocyanate, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 55-65 ℃, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 65-75 ℃, and keeping the temperature for 1-2 hours;
then heating the reaction kettle to 75-85 ℃, and keeping the temperature for 1-2 hours;
then adding a catalyst at 75-85 ℃, and keeping the temperature for 1-2 hours;
and then sequentially adding a latent curing agent and a stabilizing agent at 75-85 ℃, keeping the temperature for 50-100 minutes, then opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle, continuously vacuumizing for 20-40 minutes under the vacuum degree of-0.095-0.1 MPa, then gradually reducing the stirring speed to be static, and finally standing for 5-10 minutes to obtain the nano-silicon/aluminum/silicon/.
10. The preparation method of the high-solid-content environment-friendly polyurethane waterproof coating material as claimed in claim 9, wherein the preparation method comprises the following steps: the isocyanate consists of TDI or is formed by mixing TDI and at least one of MDI or PAPI according to any proportion; and detecting whether the percentage content of the free TDI is lower than 0.3% or not in the process of keeping the temperature of the reaction kettle constant for 50-100 minutes after the latent curing agent and the stabilizing agent are added, and opening a vacuum pump connected with the reaction kettle to vacuumize the reaction kettle after the percentage content of the free TDI is lower than 0.3%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430426A (en) * | 2020-11-25 | 2021-03-02 | 开来湿克威防水科技股份有限公司 | Formula and preparation method of high-solid-content polyurethane waterproof coating |
| CN113265194A (en) * | 2021-04-16 | 2021-08-17 | 三棵树涂料股份有限公司 | High-strength high-solid-content single-component polyurethane waterproof coating and preparation method thereof |
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| CN113416485A (en) * | 2021-08-06 | 2021-09-21 | 四川三棵树涂料有限公司 | Anti-sagging polyurethane waterproof coating and preparation method thereof |
| CN114539903A (en) * | 2022-03-24 | 2022-05-27 | 滨州市良友防水材料有限责任公司 | Heat-preservation heat-insulation polyurethane waterproof coating and preparation method thereof |
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