CN110437724B - Indoor waterproof polyurethane coating and preparation and construction process thereof - Google Patents
Indoor waterproof polyurethane coating and preparation and construction process thereof Download PDFInfo
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- CN110437724B CN110437724B CN201910716933.3A CN201910716933A CN110437724B CN 110437724 B CN110437724 B CN 110437724B CN 201910716933 A CN201910716933 A CN 201910716933A CN 110437724 B CN110437724 B CN 110437724B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/6696—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/36 or hydroxylated esters of higher fatty acids of C08G18/38
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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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
-
- 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
-
- 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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
Abstract
The invention provides an indoor waterproof polyurethane coating, which is white and light gray in appearance, and can be visually judged from the color without adding dark toxic and harmful substances such as black coal tar, coffee liquid coumarone and the like; and the coating is suitable for adopting a spraying construction process, and the problems of high coating construction difficulty, difficult quality control and the like of the polyurethane coating are solved. The invention also provides a preparation process and a construction process of the polyurethane coating. The invention is especially prepared into a bi-component water-based epoxy coating which is coated on a base surface in a rolling way, can wrap and consolidate dust on the base surface, improves the bonding strength of the base surface, and is used as an interface agent to seal the base surface so as to meet the construction requirement of the polyurethane waterproof coating on a wet base surface. According to the invention, the special sand layer is coated on the surface of the polyurethane waterproof coating, so that the problem of subsequent plastering and tiling of the polyurethane coating wall surface is solved; meanwhile, the construction of the layer plays a very good role in protecting the polyurethane coating layer, and the coating is prevented from being damaged by ultraviolet rays when exposed.
Description
Technical Field
The invention relates to a polyurethane coating for indoor water resistance and a preparation process and a construction process thereof.
Background
Kitchen and bathroom leakage and terrace leakage are one of the highest complaint rate parts of the building quality of residents. Because the space of indoor waterproof parts (kitchens and bathrooms, tea rooms, terraces and the like) is narrow and more devices such as pipelines and the like exist, the currently selected waterproof materials mainly comprise JS polymer cement waterproof paint, polyurethane waterproof paint and other paint waterproof materials from the aspect of construction operation.
The JS polymer cement waterproof paint is convenient to construct, good in environmental protection performance and low in cost, occupies most of markets at present, but is difficult to meet indoor waterproof requirements due to the problems that the material is poor in deformation resistance, high in water absorption rate, not resistant to water immersion and the like, leakage is easy to generate, walls are moist and mildewed, and the like.
The traditional polyurethane waterproof coating has high elongation, high bonding strength with concrete, extremely low water absorption rate and good waterproof effect, but has the problems of high requirement on a construction base surface, slow construction, high manufacturing cost, large smell and no environmental protection, easy falling of a vertical face tile after construction and the like, thereby greatly limiting the application of the polyurethane waterproof coating in indoor waterproof engineering.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an indoor waterproof polyurethane coating which is prepared from the following raw materials in parts by weight:
40 parts of polyether 3050, 180 parts of polyether 2000, 100 parts of chlorinated paraffin, 20 parts of vegetable oil, 80 parts of DINP, 1 part of dispersing agent, 40 parts of light calcium, 50 parts of kaolin, 200 parts of talcum powder, 200 parts of heavy calcium, 50 parts of isocyanate, 20 parts of latent curing agent, 1 part of defoaming agent, 1 part of catalyst T-12, 1 part of salicylic acid and 1 part of white or light gray color paste;
the polyurethane coating for indoor waterproofing is white or light gray.
The invention provides a preparation process of the indoor waterproof polyurethane coating, which comprises the following steps:
1) adding 40 parts by weight of polyether 3050 and 180 parts by weight of polyether 2000 into a high-speed dispersion stirring kettle, wherein the feeding deviation is 5 per mill; then adding 100 parts by weight of chlorinated paraffin, 20 parts by weight of vegetable oil, 80 parts by weight of DINP and 1 part by weight of dispersant, wherein the feeding deviation is 1 per mill;
2) starting a high-speed dispersion stirring kettle to heat and stir, wherein the stirring frequency is 25Hz, and 40 parts of light calcium carbonate, 50 parts of kaolin, 200 parts of talcum powder and 200 parts of heavy calcium carbonate are added when the temperature of the high-speed dispersion stirring kettle is 70 +/-10 ℃;
3) when the temperature of the high-speed dispersion stirring kettle rises to 105 ℃, starting timing, keeping the temperature at 110 +/-5 ℃ (taking the surface material temperature as the standard), vacuumizing for more than 2h until the vacuum degree is-0.085 to-0.075 MPa and the moisture is below 0.05 percent, stopping heating and vacuumizing, and pumping the dispersion liquid in the high-speed dispersion stirring kettle into a cooling kettle;
4) starting the cooling kettle for cooling and stirring, wherein the stirring frequency is 40Hz, and when the temperature of the cooling kettle is reduced to 78 ℃ (taking the temperature of the lower material as the standard), pumping the dispersion liquid in the cooling kettle into the reaction kettle;
5) adding 50 parts of isocyanate into a reaction kettle, wherein the time for adding the isocyanate into the reaction kettle is not more than 10min, starting the reaction kettle to heat and stir, starting timing when the temperature of the reaction kettle rises to 76 ℃, reacting for 2 hours, controlling the reaction temperature to be 80 +/-4 ℃, and pumping the materials in the reaction kettle into a finished product kettle;
6) and (2) starting a cooling kettle for cooling and stirring, wherein the stirring frequency is 40Hz, when the temperature of the cooling kettle is 73 +/-3 ℃ (below the temperature of the materials), adding 20 parts of latent curing agent, 1 part of defoaming agent, 1 part of catalyst T-12, 1 part of salicylic acid and 1 part of white or light gray color paste, vacuumizing until the vacuum degree is-0.085 to-0.075 MPa, stirring for 30min, and discharging at 65 +/-3 ℃ to obtain the white or light gray indoor waterproof polyurethane coating.
The invention provides a construction process of the indoor waterproof polyurethane coating, which comprises the following steps:
1) rolling and coating a bi-component water-based epoxy coating on a base surface, wherein the dosage is 0.2-0.4 kg per square meter;
the bi-component water-based epoxy coating is prepared by mixing and stirring the component A water-based epoxy resin and the component B matched curing agent in a construction site according to the mass ratio of 1:4, adding 30-80 wt% of water, and stirring again;
the component A aqueous epoxy resin consists of 90wt% of low molecular weight bisphenol A epoxy resin and 10wt% of alkyl glycidyl ether;
the component B matched curing agent consists of 40wt% of water-soluble amino-terminated polyether amine, 55wt% of water and 5wt% of ethanol;
2) after the surface of the bi-component water-based epoxy coating is dried, polyurethane coating for indoor water resistance is sprayed;
3) after the polyurethane coating for indoor water resistance is constructed for the last time, a sand layer is coated on the coating before the coating is dried, and a layer of dry and clean artificial machine-made quartz sand is coated on the coating.
The invention has the following characteristics:
1. treatment of base surface with special two-component water-borne epoxy coating
As a front-stage process of indoor decoration, the waterproof engineering is used, the conditions of a base surface on a common site are poor, the base surface generally has the defects of moisture, much dust and the like, the construction of the polyurethane waterproof coating is started after the base surface is simply cleaned in the past construction, the base surface is difficult to meet the construction requirement of the polyurethane waterproof coating, the waterproof layer and the base surface are poor in adhesion, and the waterproof quality is influenced.
The invention aims at the construction of a base surface, particularly prepares a bi-component water-based epoxy coating to be roll-coated on the base surface, can wrap and consolidate dust on the base surface, improves the bonding strength of the base surface, and simultaneously serves as an interface agent to seal the base surface so as to meet the construction requirement of a polyurethane waterproof coating on a wet base surface.
The invention solves the problem of bonding of the polyurethane waterproof coating and the base surface when the base surface has dust and is wet by constructing the water-based epoxy resin coating to be the base coating. The water-based epoxy resin coating primer is a water-based environment-friendly coating, has good environment-friendly performance, can not cause new pollution, can greatly reduce the cost due to the characteristic of mixing and using water, has small dosage, simplifies the requirement of cleaning a base surface, and has unobvious increase in cost compared with the traditional process. Meanwhile, the surface drying speed of the base coat is high, the surface drying time can be adjusted by adding a coagulant, and the construction period is not influenced.
2. Polyurethane coating for indoor water resistance spraying
The polyurethane waterproof coating is constructed after the surface of the double-component water-based epoxy coating is dried, the traditional polyurethane waterproof coating can only be constructed by manual blade coating, the construction process requirement is high, and when the base surface is uneven or has defects such as air holes, the construction is easy to generate missing coating and air bubbles.
The polyurethane coating for indoor waterproofing is a solvent-free polyurethane waterproof coating, is mainly prepared by mixing and reacting raw materials such as isocyanate, polyether 3050, polyether 2000, chlorinated paraffin, vegetable oil, DINP, talcum powder and the like in stages, and can be applied to mechanical spraying construction through improvement of a coating formula, so that the operation is simple, and the problems of missing coating, air bubbles and the like in the traditional construction are solved.
According to the invention, through the improvement of the formula, the polyurethane coating is suitable for adopting a spraying construction process, the problems of high coating construction difficulty, difficult quality control and the like of the polyurethane coating are solved, the construction efficiency is high, and the labor cost and the labor intensity are reduced.
3. Solving the problem of vertical face tiling through sand layer covering
The polyurethane waterproof coating has good elasticity after reaction and film formation, can resist damage caused by structural cracking, but the good elasticity causes poor passive adhesion of a coating film, and in the past, bricks are easy to fall off when tiling is carried out on the polyurethane waterproof coating after the polyurethane waterproof coating is constructed, so that the application of the polyurethane waterproof coating is greatly limited.
After a large number of tests and practices, it is found that after the polyurethane waterproof coating is constructed for the last time and before the coating is dried and solidified, a layer of dry and clean artificial mechanism quartz sand is coated on the coating, and the adhesive strength of the tile can reach more than 0.8MPa by increasing the coating of the sand layer, so that the requirement of the adhesive strength of 0.4MPa required by national specifications is completely met.
In addition, after a large number of practices, the polyurethane waterproof coating is found to have a good protection effect on the coating after the surface of the polyurethane waterproof coating is subjected to sand layer covering treatment, and the chemical damage of solar ultraviolet rays to the coating can be avoided.
According to the invention, the special sand layer is coated on the surface of the polyurethane waterproof coating, so that the problem of subsequent plastering and tiling of the polyurethane coating wall surface is solved; meanwhile, the construction of the layer plays a very good role in protecting the polyurethane coating layer, and the coating is prevented from being damaged by ultraviolet rays when exposed.
4. Adopts solvent-free polyurethane waterproof paint
The indoor waterproof polyurethane coating has the following characteristics:
1) the appearance is white and light gray, and the addition of dark toxic and harmful substances such as black coal tar, coffee liquid coumarone and the like can be visually judged from the color.
2) The solid content is high: the solid content of common single-component polyurethane coating in the market is generally 86-90%, the common single-component polyurethane coating contains more volatile solvent, and the common single-component polyurethane coating has great harm to personnel and environment.
The invention solves the problems of large pollution and environmental pollution of the traditional polyurethane through a solvent-free formula. The appearance of the polyurethane foam is white or light, the addition of traditional polyurethane dark coal tar and liquid coumarone is avoided, and the reliability of users is improved. The solvent-free formula has a certain degree of increase in the viscosity of polyurethane, and the solvent-free formula has the advantages that the coating is not easy to flow during construction, the coating has good anti-sagging performance, but the viscosity of the polyurethane coating is improved to a certain degree due to the increase of solid content, so that the construction difficulty of the coating is possibly increased, but the viscosity of the polyurethane coating can be remarkably reduced through a safe and environment-friendly electric heating mode due to the characteristics of the prepolymer of the polyurethane coating, at present, if mechanical spraying construction is adopted, a heater can be integrated on spraying equipment, and the coating plays a role in reducing the viscosity through the heater during conveying in a pipeline, so that normal atomization and spraying are ensured.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention provides an indoor waterproof polyurethane coating which is prepared from the following raw materials in parts by weight:
40 parts of polyether 3050, 180 parts of polyether 2000, 100 parts of chlorinated paraffin, 20 parts of vegetable oil, 80 parts of DINP, 1 part of dispersing agent, 40 parts of light calcium, 50 parts of kaolin, 200 parts of talcum powder, 200 parts of heavy calcium, 50 parts of isocyanate, 20 parts of latent curing agent, 1 part of defoaming agent, 1 part of catalyst T-12, 1 part of salicylic acid and 1 part of white or light gray color paste;
the polyurethane coating for indoor waterproofing is white or light gray.
The invention provides a preparation process of the indoor waterproof polyurethane coating, which comprises the following steps:
1) adding 40 parts by weight of polyether 3050 and 180 parts by weight of polyether 2000 into a high-speed dispersion stirring kettle, wherein the feeding deviation is 5 per mill; then adding 100 parts by weight of chlorinated paraffin, 20 parts by weight of vegetable oil, 80 parts by weight of DINP and 1 part by weight of dispersant, wherein the feeding deviation is 1 per mill;
2) starting a high-speed dispersion stirring kettle to heat and stir, wherein the stirring frequency is 25Hz, and 40 parts of light calcium carbonate, 50 parts of kaolin, 200 parts of talcum powder and 200 parts of heavy calcium carbonate are added when the temperature of the high-speed dispersion stirring kettle is 70 +/-10 ℃;
3) when the temperature of the high-speed dispersion stirring kettle rises to 105 ℃, starting timing, keeping the temperature at 110 +/-5 ℃ (taking the surface material temperature as the standard), vacuumizing for more than 2h until the vacuum degree is-0.085 to-0.075 MPa and the moisture is below 0.05 percent, stopping heating and vacuumizing, and pumping the dispersion liquid in the high-speed dispersion stirring kettle into a cooling kettle;
4) starting the cooling kettle for cooling and stirring, wherein the stirring frequency is 40Hz, and when the temperature of the cooling kettle is reduced to 78 ℃ (taking the temperature of the lower material as the standard), pumping the dispersion liquid in the cooling kettle into the reaction kettle;
5) adding 50 parts of isocyanate into a reaction kettle, wherein the time for adding the isocyanate into the reaction kettle is not more than 10min, starting the reaction kettle to heat and stir, starting timing when the temperature of the reaction kettle rises to 76 ℃, reacting for 2 hours, controlling the reaction temperature to be 80 +/-4 ℃, and pumping the materials in the reaction kettle into a finished product kettle;
6) and (2) starting a cooling kettle for cooling and stirring, wherein the stirring frequency is 40Hz, when the temperature of the cooling kettle is 73 +/-3 ℃ (below the temperature of the materials), adding 20 parts of latent curing agent, 1 part of defoaming agent, 1 part of catalyst T-12, 1 part of salicylic acid and 1 part of white or light gray color paste, vacuumizing until the vacuum degree is-0.085 to-0.075 MPa, stirring for 30min, and discharging at 65 +/-3 ℃ to obtain the white or light gray indoor waterproof polyurethane coating.
The invention provides a construction process of the indoor waterproof polyurethane coating, which comprises the following steps:
1) rolling and coating a bi-component water-based epoxy coating on a base surface, wherein the dosage is 0.2-0.4 kg per square meter;
the bi-component water-based epoxy coating is prepared by mixing and stirring the component A water-based epoxy resin and the component B matched curing agent in a construction site according to the mass ratio of 1:4, adding 30-80 wt% of water, and stirring again;
the component A aqueous epoxy resin consists of 90wt% of low molecular weight bisphenol A epoxy resin and 10wt% of alkyl glycidyl ether;
the component B matched curing agent consists of 40wt% of water-soluble amino-terminated polyether amine, 55wt% of water and 5wt% of ethanol;
2) after the surface of the bi-component water-based epoxy coating is dried, polyurethane coating for indoor water resistance is sprayed;
3) after the polyurethane coating for indoor water resistance is constructed for the last time, a sand layer is coated on the coating before the coating is dried, and a layer of dry and clean artificial machine-made quartz sand is coated on the coating.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. The construction process of the indoor waterproof polyurethane coating is characterized by comprising the following steps of:
the polyurethane coating for indoor waterproofing is prepared by the following steps:
1) adding 40 parts by weight of polyether 3050 and 180 parts by weight of polyether 2000 into a high-speed dispersion stirring kettle, wherein the feeding deviation is 5 per mill; then adding 100 parts by weight of chlorinated paraffin, 20 parts by weight of vegetable oil, 80 parts by weight of DINP and 1 part by weight of dispersant, wherein the feeding deviation is 1 per mill;
2) starting a high-speed dispersion stirring kettle to heat and stir, wherein the stirring frequency is 25Hz, and 40 parts of light calcium carbonate, 50 parts of kaolin, 200 parts of talcum powder and 200 parts of heavy calcium carbonate are added when the temperature of the high-speed dispersion stirring kettle is 70 +/-10 ℃;
3) when the temperature of the high-speed dispersion stirring kettle rises to 105 ℃, starting timing, keeping the temperature at 110 +/-5 ℃, vacuumizing for more than 2 hours until the vacuum degree is-0.085 to-0.075 MPa and the moisture is below 0.05 percent, stopping heating and vacuumizing, and pumping the dispersion liquid in the high-speed dispersion stirring kettle into a cooling kettle;
4) starting the cooling kettle for cooling and stirring, wherein the stirring frequency is 40Hz, and when the temperature of the cooling kettle is reduced to 78 ℃, pumping the dispersion liquid in the cooling kettle into the reaction kettle;
5) adding 50 parts of isocyanate into a reaction kettle, wherein the time for adding the isocyanate into the reaction kettle is not more than 10min, starting the reaction kettle to heat and stir, starting timing when the temperature of the reaction kettle rises to 76 ℃, reacting for 2 hours, controlling the reaction temperature to be 80 +/-4 ℃, and pumping the materials in the reaction kettle into a finished product kettle;
6) starting a cooling kettle for cooling and stirring, wherein the stirring frequency is 40Hz, when the temperature of the cooling kettle is 73 +/-3 ℃, adding 20 parts of latent curing agent, 1 part of defoaming agent, 1 part of catalyst T-12, 1 part of salicylic acid and 1 part of white or light gray color paste, vacuumizing until the vacuum degree is-0.085 to-0.075 MPa, stirring for 30min, and discharging at 65 +/-3 ℃ to obtain the white or light gray polyurethane coating for indoor water proofing;
the construction process comprises the following steps:
1) rolling and coating a bi-component water-based epoxy coating on a base surface, wherein the dosage is 0.2-0.4 kg per square meter;
the bi-component water-based epoxy coating is prepared by mixing and stirring the component A water-based epoxy resin and the component B matched curing agent in a construction site according to the mass ratio of 1:4, adding 30-80 wt% of water, and stirring again;
the component A aqueous epoxy resin consists of 90wt% of low molecular weight bisphenol A epoxy resin and 10wt% of alkyl glycidyl ether;
the component B matched curing agent consists of 40wt% of water-soluble amino-terminated polyether amine, 55wt% of water and 5wt% of ethanol;
2) after the surface of the bi-component water-based epoxy coating is dried, polyurethane coating for indoor water resistance is sprayed;
3) after the polyurethane coating for indoor water resistance is constructed for the last time, a sand layer is coated on the coating before the coating is dried, and a layer of dry and clean artificial machine-made quartz sand is coated on the coating.
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| CN116082940A (en) * | 2022-12-29 | 2023-05-09 | 河南三棵树新材料科技有限公司 | Exposed water-based polyurethane waterproof coating and preparation method and construction method thereof |
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| CN102190506A (en) * | 2010-03-05 | 2011-09-21 | 上海耐齐建材有限公司 | Dual-component surfactant |
| CN103806612A (en) * | 2012-11-15 | 2014-05-21 | 江苏凯伦建材股份有限公司 | Construction method for plastering single-component modified polyurethane inner surface |
| CN103805047A (en) * | 2012-11-15 | 2014-05-21 | 江苏凯伦建材股份有限公司 | High-solid polyurethane waterproof coating and preparation method thereof |
| CN108300164A (en) * | 2017-01-11 | 2018-07-20 | 江苏苏博特新材料股份有限公司 | Waterborne curing agent, aqueous epoxy resins composition and its application in the waterproof reinforced coating of Thief zone |
| CN109021810A (en) * | 2018-08-13 | 2018-12-18 | 四川杨氏达防水材料有限公司 | Polymer environment protection type polyurethane water-proof paint for buildings waterproof position |
| CN109321122A (en) * | 2018-08-29 | 2019-02-12 | 江苏凯伦建材股份有限公司 | A kind of solvent-free anti-sag polyurethane water-proof paint of quick-dry type and preparation method thereof |
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