CN112608671B - Heat-insulating polyurethane anticorrosive paint and preparation method thereof - Google Patents
Heat-insulating polyurethane anticorrosive paint and preparation method thereof Download PDFInfo
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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Abstract
The embodiment of the invention relates to a heat-insulation polyurethane anticorrosive coating and a preparation method thereof, wherein the coating is prepared by mixing a component A and a component B which are prepared in advance according to the weight ratio of 1: 0.2-0.4, wherein the component A comprises the following components in percentage by mass: 30-50% of polyurethane, 3-5% of epoxy resin, 5-8% of fluorocarbon resin, 10-15% of heat-insulating and heat-preserving composite bone paste, 3-5% of reflective aggregate, 10-15% of filler, 1-5% of pigment, 0.5-1% of fatty acid amide, 0.5-1% of higher fatty alcohol, 1-2% of dispersant, 3-5% of anti-rust pigment and 10-15% of diluent; the component B is isocyanate crosslinking agent. The heat-insulating and heat-preserving polyurethane anticorrosive paint provided by the embodiment of the invention can be widely applied to surface protection of metal components, oil and gas tanks, underground pipelines, outdoor pipelines, various outdoor equipment, containers and the like, can obviously reduce cold and hot convection and radiation heat transfer while providing high-performance long-acting anticorrosive protection, accelerates self heat dissipation and reduces cold and hot loads.
Description
Technical Field
The embodiment of the invention relates to the field of functional anticorrosive materials, in particular to a heat-insulating polyurethane anticorrosive paint and a preparation method thereof.
Background
The heat insulation material is widely applied to engineering containment or thermal equipment, impedance refrigeration and heat flow energy convection transfer, and comprises a heat insulation material, a cold insulation material and a heat insulation material. The developed countries pay great attention to the research and development and application of novel heat insulation materials, the importance of energy conservation and emission reduction in national production is further highlighted along with the promotion and implementation of new energy-saving and environment-friendly strategic industries, and the heat insulation materials are regarded as the fifth big energy source following coal, petroleum, natural gas and nuclear energy.
For example, in the field of petrochemical industry, steel structure materials in metals have become the most important structural forms for petrochemical oil pipelines, storage tank transportation and the like due to the characteristics of light self-weight, good ductility and the like. Meanwhile, the technical problem of anticorrosion protection of metal matrix structures is quite remarkable, and according to statistics, the economic loss caused by corrosion of the metal matrix structures in the world every year is the sum of losses caused by fire, wind and earthquake. Therefore, it is necessary to protect the metal matrix structure from corrosion effectively and to prevent the mechanical properties of the substrate, such as yield point, tensile strength and elastic modulus, from decreasing. Meanwhile, potential accident potential and excessive energy waste are brought to oil pipelines, storage tank containers and open-air reaction kettles by high temperature and refrigeration. After hardware products such as oil tank trucks, industrial storage tanks, buildings, petroleum pipelines and the like are exposed to the sun in summer, the temperature rises to different degrees, and the oil tank trucks for transporting the petroleum lose 0.2-0.5% of the petroleum each day due to the rise of the related temperature caused by solar radiation. In summer high-temperature environment, outdoor oil gas tanks, liquefied gas tanks, oil vehicle tanks, chemical raw material tanks and the like need to be cooled by a large amount of water spray, which not only wastes a large amount of water resources and electric resources, but also causes considerable corrosivity to metal structures, and seriously affects the maintenance of the tanks, the tanks and other equipment and the civilized production environment.
In the field of capital construction engineering, more and more metal roofs are adopted in industrial plants, simple plants or temporary buildings, the surface temperature of a red rust-proof iron sheet can be close to 60 ℃ when the temperature reaches the highest in summer, the indoor temperature can not be reduced by adopting air-conditioning refrigeration under many conditions, and the method of reducing the indoor environment temperature by means of separating the surface temperature of an object is the most effective and feasible method.
In military affairs, high temperature not only can seriously affect the fighting capacity of military, but also the overhigh temperature is equal to the enlargement of military facilities, such as infrared targets of vehicles and ships, and the infrared targets are easy to be detected and aimed by enemies.
At present, the traditional heat insulation layer comprises asbestos, sandwich heat insulation boards, heat insulation mortar and other modes, and has poor convection and radiation heat transfer effects, high thickness, high water absorption rate, no vibration resistance, high cost, easy peeling, high construction difficulty, environment pollution caused by harmful solvents and VOC toxic volatile substances, short service life and other unsatisfactory physical properties of some types of heat insulation coatings.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a heat-insulating polyurethane anticorrosive coating, which can remarkably reduce the heat convection and radiation heat transfer generated on the surface of a substrate and in the internal environment, accelerate the self heat dissipation, reduce the cold and heat load of a structure, form effective anticorrosive protection on the surface of the coated substrate, and has the advantages of strong decoration, low energy consumption and long service life.
The technical problem to be further solved in the embodiments of the present invention is to provide a method for preparing a heat insulation and preservation polyurethane anticorrosive coating, which has a simple process and is easy to implement, so that the heat insulation and preservation polyurethane anticorrosive coating which can form effective protection on the surface of a coated substrate, has strong decoration, low energy consumption and long service life can be prepared efficiently and in an energy-saving manner.
In order to solve the above technical problems, an embodiment of the present invention first provides the following technical solutions: a heat-insulating and heat-preserving polyurethane anticorrosive paint is prepared by mixing a component A and a component B which are prepared in advance in a proportion of 1: 0.2-0.4, wherein the component A comprises the following components in percentage by mass: 30-50% of polyurethane, 3-5% of epoxy resin, 5-8% of fluorocarbon resin, 10-15% of heat-insulating and heat-preserving composite bone paste, 3-5% of reflective aggregate, 10-15% of filler, 1-5% of pigment, 0.5-1% of fatty acid amide, 0.5-1% of higher fatty alcohol, 1-2% of dispersant, 3-5% of anti-rust pigment and 10-15% of diluent;
the component B is as follows: an isocyanate crosslinking agent;
wherein the polyurethane comprises at least one of acrylic modified polyurethane resin, cage type polysilsesquioxane modified polyurethane resin and organic silicon modified polyurethane resin;
the epoxy resin is polyether sulfone modified epoxy resin or dimethyl hydantoin epoxy resin with the epoxy equivalent of 450-550;
the fluorocarbon resin is polyvinylidene fluoride type fluorocarbon resin or copolymerization type fluorocarbon resin;
the heat-insulating composite bone slurry is composed of polyurethane resin, ceramic fiber, sepiolite, mica powder, perlite, silicon micropowder, improved soil and a dispersing agent, and the solid content of the heat-insulating composite bone slurry is 30% -50%.
Furthermore, the ceramic fiber is polycrystalline zirconia soluble type spinning ceramic fiber with the diameter of 2-5 mu m and the length of 30-100 mm;
the sepiolite is beta-sepiolite;
the mica powder is 1250-2000 mesh wet-process flaky sericite;
the perlite has an expansion multiple index value of more than or equal to 6.0 times and is SiO2The first-class expanded perlite with the index value of more than or equal to 68 percent;
the silicon micro powder is SiO with the particle size of less than 1 mu m and the spherical particle size of 30-50 nm2The index value is more than or equal to 99.5 percent, and the index value is spherical silicon oxide powder obtained by the heat treatment method;
the improved soil is polystyrene foam light soil.
Further, the reflective aggregate has a median particle diameter D50 of 25-40 μm and a real density (g/cm)3) 0.30 +/-0.02-0.4 +/-0.02% of aluminosilicate hollow microspheres or polycrystalline glass hollow microspheres.
Further, the filler is one of calcined kaolin, natural barium sulfate and quartz powder;
the pigment is one or a mixture of more of titanium dioxide, lithopone and calcium carbonate.
Further, the fatty acid amide is erucamide or ethylene bis-stearamide;
the higher aliphatic alcohol is carbonyl straight-chain primary alcohol type higher aliphatic alcohol with the carbon number of C14-C30 or higher aliphatic alcohol of polyoxyethylene polyoxypropylene block polymer;
the dispersing agent is a solution dispersing agent of polycarboxylic acid and polysiloxane copolymer.
Further, the antirust pigment is zinc benzoate or zinc phosphomolybdate or titanium phosphate;
the diluent is one or a combination of more of aromatic hydrocarbons, acetate and ketones without hydroxyl end, water and acid residue;
the isocyanate crosslinking agent is hexamethylene diisocyanate trimer aliphatic polyisocyanate or hexamethylene diisocyanate biuret aliphatic polyisocyanate.
In order to solve the above technical problem to be further solved, an embodiment of the present invention further provides the following technical solutions: a preparation method of the heat-insulating and heat-preserving polyurethane anticorrosive paint comprises the following steps:
preparing component A and preparing an isocyanate crosslinking agent as component B; and
during construction, the component B is gradually added into the component A under stirring according to a preset dosage ratio, the component A is added while stirring, powder agglomeration and bottom sinking are avoided until the two components are uniformly mixed, and the mixture is filtered and discharged to obtain a finished product of the heat-insulating and heat-preserving polyurethane anticorrosive paint;
wherein the preparation process of the component A is as follows:
preparing heat insulation composite bone slurry;
according to the formula dosage, adding a diluent accounting for 20-30% of the total dosage, a polyurethane resin accounting for 30-40% of the total dosage, an epoxy resin accounting for 50% of the total dosage and a fluorocarbon resin accounting for 50% of the total dosage into a dispersion mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed to sequentially add a filler, a pigment, a fatty acid amide accounting for 50% of the total dosage, a higher fatty alcohol accounting for 50% of the total dosage and a dispersing agent accounting for 30% of the total dosage, keeping the rotating speed to avoid powder agglomeration and bottom sinking, after the adding is finished, adjusting the rotating speed to 1600-1800 rmp, uniformly stirring at a high speed, adjusting the rotating speed to 600-800 rmp, starting to add a reflection aggregate, keeping the rotating speed, stopping the machine until the materials are uniformly mixed and dispersed, and preparing a standby solution;
adding the rest of the diluent, the polyurethane resin, the epoxy resin, the fluorocarbon resin, the antirust pigment and the rest of the dispersant into a dispersion mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed, sequentially adding the prepared heat insulation composite bone slurry, the fatty acid amide and the higher fatty alcohol, adjusting the rotating speed to 1600-1800 rmp, performing high-speed stirring and dispersion at the rotating speed of 800-1200 rmp for 2-3 hr, adjusting the rotating speed to 600-800 rmp, starting adding the prepared standby solution, keeping the rotating speed for continuous dispersion for 1-1.5 hr, stopping, filtering and discharging to obtain the component A of the heat insulation polyurethane anticorrosive paint.
Further, the preparation of the heat insulation composite bone slurry specifically comprises the following steps: in an integrated reaction kettle with the functions of feeding, vacuum feeding, dripping, magnetic material powder quantitative feeding, weighing and metering, mixing and stirring, according to the formula dosage of the heat-insulation and heat-preservation composite bone slurry, 30-40% of diluent accounting for the total dosage is added into polyurethane accounting for 20-30% of the total dosage, after the polyurethane is uniformly dispersed and stirred at the rotating speed of 800-1200 rmp, the rotating speed is adjusted to 200-300 rmp, ceramic fiber, sepiolite, mica powder, perlite, silicon micropowder, improved soil and 40% of dispersing agent accounting for the total dosage are sequentially added while stirring, the rotating speed is maintained to avoid powder agglomeration and bottom sinking, after the addition is finished, the rotating speed is adjusted to 1200-1500 rmp, high-speed stirring and dispersing are carried out, and the high-speed stirring and dispersing are carried out until the uniform dispersion is carried out, so that the heat-insulation and heat-preservation composite bone slurry is obtained.
By adopting the technical scheme, the embodiment of the invention at least has the following beneficial effects: the anticorrosive paint plays an important role in national economic development, various novel capital construction materials are continuously invented, created and produced along with continuous innovation and perfection of technological level and equipment technology, and simultaneously, new technology and process provide quality assurance for the production of new products.
1. The invention researches the composition and the addition of multiple materials, fully utilizes the complementary advantages among the materials, achieves the optimal balance of the performances of protection, heat insulation, heat preservation and the like, obviously improves the protection rate of the coating under various severe environments, has excellent heat insulation and heat preservation stability at high and low temperatures, and obviously improves the protection limit strength and long-term effectiveness of the base materials such as a steel structure and the like.
2. Compared with the traditional polyurethane anticorrosive paint, the heat-insulating and heat-preserving polyurethane anticorrosive paint has good comprehensive performance, can be widely applied to metal components, oil and gas tanks, outdoor pipelines, various outdoor equipment, containers and the like, greatly reduces the absorption of radiation heat and accelerates the dissipation of self heat, thereby reducing the temperature of protected objects, reducing the electric power, manpower and equipment cost caused by measures such as water spraying cooling, air conditioning electric power and the like, prolonging the service life of the equipment and the like.
3. The product of the invention has excellent performance in the aspects of freezing prevention and freezing resistance. The heat-insulating material is used for protecting or thermal equipment and materials for resisting heat flow transmission, and comprises heat-insulating materials and cold-insulating materials. In the fields of petrochemical industry, energy, power, metallurgy, aerospace and the like, the high-temperature Corrosion problem and the freezing and thawing freeze injury problem generally exist, asbestos and sandwich Insulation boards are generally adopted in the aspect of freeze injury prevention, Insulation mortar is used for coating objects, but the Corrosion Under an Insulation layer is generally caused, the Corrosion environment of a steel member in the Insulation state is almost the same as (or worse than) the soaking environment, the operating pressure is from vacuum to 280MPa or even higher, the steel surface is not subjected to proper corosion Under Insulation Corrosion protection, the unknown phenomenon is caused, the operating medium comprises steam, severe toxicity, Corrosion and flammability, and once Corrosion leakage occurs, huge property loss, casualties and environmental pollution are caused. As a protective coating, the relation between the specific physical and chemical conditions of a base material and the frost heaving rate needs to be considered, and the frost resistance is obviously improved.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It is to be understood that the following illustrative embodiments and description are only intended to illustrate the present invention, and are not intended to limit the present invention, and features of the embodiments and examples of the present invention may be combined with each other without conflict.
The embodiment of the invention provides a heat-insulation and heat-preservation polyurethane anticorrosive paint, which is prepared by mixing a component A and a component B in a weight ratio of 1: 0.2 to 0.4. Preferably, the mass ratio of component a to component B is 1: 0.3.
the specific components and formulas of the component A and the component B are respectively described as follows, and the formula comprises the following components in percentage by mass:
the component A comprises the following components in percentage by mass:
30-50% of polyurethane;
3-5% of epoxy resin;
5-8% of fluorocarbon resin;
10 to 15 percent of heat insulation and preservation composite bone slurry;
3-5% of reflective aggregate;
10 to 15 percent of filler;
1-5% of pigment;
0.5 to 1% of fatty acid amide;
0.5-1% of higher fatty alcohol;
1% -2% of a dispersant;
3 to 5 percent of antirust pigment;
10 to 15 percent of diluent.
The component B is an isocyanate crosslinking agent.
In specific implementation, the polyurethane adopted by the component A is one or a combination of more of acrylic acid modified polyurethane resin, cage type polysilsesquioxane modified polyurethane resin and organic silicon modified polyurethane resin.
In one embodiment, the epoxy resin is polyether sulfone modified epoxy resin or dimethyl hydantoin epoxy resin with the epoxy equivalent weight of 450-550.
In one embodiment, the fluorocarbon resin is a polyvinylidene fluoride-type fluorocarbon resin or a co-polymer-type fluorocarbon resin.
In one embodiment, the heat insulation and preservation composite bone slurry is composed of polyurethane resin, ceramic fiber, sepiolite, mica powder, perlite, silicon micropowder, modified soil and a dispersing agent, and the solid content of the heat insulation and preservation composite bone slurry is 30% -50%.
In one embodiment, the ceramic fiber is a polycrystalline zirconia soluble type spinning ceramic fiber with the diameter of 2-5 μm and the length of 30-100 mm; the sepiolite is beta-sepiolite; the mica powder is 1250-2000 mesh wet-process flaky sericite; the perlite has an expansion multiple index value of more than or equal to 6.0 times and is SiO2The first-class expanded perlite with the index value of more than or equal to 68 percent; the silicon micro powder is SiO with the particle size of less than 1 mu m and the spherical particle size of 30-50 nm2The index value is more than or equal to 99.5 percent, and the index value is spherical silicon oxide powder obtained by the heat treatment method; the improved soil is heat-insulating and heat-preserving composite bone slurry which is composed of EPS (polystyrene foam) light soil and has the solid content of 30-50%.
In one embodiment, the reflective aggregate has a median particle diameter D50 of 25-40 μm and a true density (g/cm)3) 0.30 +/-0.02-0.4 +/-0.02% of aluminosilicate hollow microspheres or polycrystalline glass hollow microspheres.
In one embodiment, the filler is one of calcined kaolin, natural barium sulfate, or quartz powder.
In one embodiment, the pigment is one or a mixture of titanium dioxide, lithopone and calcium carbonate.
In one embodiment, the fatty acid amide is erucamide or ethylene bis-stearamide.
In one embodiment, the higher aliphatic alcohol is a higher aliphatic alcohol of a carbonyl linear primary alcohol type having a carbon number of C14 to C30 or a higher aliphatic alcohol of a polyoxyethylene polyoxypropylene block polymer.
In one embodiment, the dispersant is a polycarboxylic acid and polysiloxane copolymer solution dispersant.
In one embodiment, the rust inhibitive pigment is zinc benzoate or zinc phosphomolybdate or titanium phosphate.
In one embodiment, the diluent is one or a combination of aromatic hydrocarbons, acetic acid esters and ketones without hydroxyl end, water and acid residue.
In specific implementation, the component A needs to be prepared in advance for later use. The component A can refer to the following formulas, and the percentages in the table are mass percentages:
the above formulas have small difference in the realization effect, and can achieve good heat insulation and preservation effects and corrosion prevention effects.
In one embodiment, the isocyanate crosslinker of component B is hexamethylene diisocyanate trimer aliphatic polyisocyanate or hexamethylene diisocyanate biuret aliphatic polyisocyanate.
On the other hand, in order to conveniently prepare the heat-insulating and heat-preserving polyurethane anticorrosive paint, the invention also provides a preparation method of the heat-insulating and heat-preserving polyurethane anticorrosive paint, which comprises the following steps:
preparing component A and preparing an isocyanate crosslinking agent as component B; and
during construction, according to a preset dosage ratio (the component A: the component B is 1: 0.2-0.4), gradually adding the component B into the stirred component A while stirring, avoiding powder agglomeration and bottom sinking until the two are uniformly mixed, and filtering and discharging to obtain a finished product of the heat-insulating and heat-preserving polyurethane anticorrosive paint;
wherein the preparation process of the component A is as follows:
preparing heat insulation composite bone slurry;
according to the formula dosage, adding a diluent accounting for 20-30% of the total dosage, a polyurethane resin accounting for 30-40% of the total dosage, an epoxy resin accounting for 50% of the total dosage and a fluorocarbon resin accounting for 50% of the total dosage into a dispersion mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed to sequentially add a filler, a pigment, a fatty acid amide accounting for 50% of the total dosage, a higher fatty alcohol accounting for 50% of the total dosage and a dispersing agent accounting for 30% of the total dosage, keeping the rotating speed to avoid powder agglomeration and bottom sinking, after the adding is finished, adjusting the rotating speed to 1600-1800 rmp, uniformly stirring at a high speed, adjusting the rotating speed to 600-800 rmp, starting to add a reflection aggregate, keeping the rotating speed, stopping the machine until the materials are uniformly mixed and dispersed, and preparing a standby solution;
adding the rest of the diluent, the polyurethane resin, the epoxy resin, the fluorocarbon resin, the antirust pigment and the rest of the dispersant into a dispersion mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed, sequentially adding the prepared heat insulation composite bone slurry, the fatty acid amide and the higher fatty alcohol, adjusting the rotating speed to 1600-1800 rmp, performing high-speed stirring and dispersion at the rotating speed of 800-1200 rmp for 2-3 hr, adjusting the rotating speed to 600-800 rmp, starting adding the prepared standby solution, keeping the rotating speed for continuous dispersion for 1-1.5 hr, stopping, filtering and discharging to obtain the component A of the heat insulation polyurethane anticorrosive paint.
Wherein, the preparation of the heat insulation and preservation composite bone slurry specifically comprises the following steps: in an integrated reaction kettle with the functions of feeding, vacuum feeding, dripping, magnetic material powder quantitative feeding, weighing and metering, mixing and stirring, according to the formula dosage of the heat-insulation and heat-preservation composite bone slurry, 30-40% of diluent accounting for the total dosage is added into polyurethane accounting for 20-30% of the total dosage, after the polyurethane is uniformly dispersed and stirred at the rotating speed of 800-1200 rmp, the rotating speed is adjusted to 200-300 rmp, ceramic fiber, sepiolite, mica powder, perlite, silicon micropowder, improved soil and 40% of dispersing agent accounting for the total dosage are sequentially added while stirring, the rotating speed is maintained to avoid powder agglomeration and bottom sinking, after the addition is finished, the rotating speed is adjusted to 1200-1500 rmp, high-speed stirring and dispersing are carried out, and the high-speed stirring and dispersing are carried out until the uniform dispersion is carried out, so that the heat-insulation and heat-preservation composite bone slurry is obtained.
In the actual use process, when the component A and the component B are mixed, the component B (isocyanate crosslinking agent) is gradually added into the component A while stirring, powder is prevented from caking and sinking to the bottom until the components are thoroughly and uniformly mixed, and then a filter screen of 40-80 meshes is used for filtering, so that the heat-insulating and heat-preserving polyurethane anticorrosive paint is obtained. Typically, the mixing step is performed at the construction site so that the spraying operation is performed immediately after mixing.
The heat-insulating polyurethane anticorrosive coating has the following beneficial effects:
1. the corrosion resistance of the steel member is remarkable, the specification of the corrosion resistance of the steel member is very important for ensuring the safety of buildings, and the service life of the coating can meet the requirements of ISO12944 standard in the standard state of the product of the invention: under the corrosive environment condition of C3-C5, the service life of the coating reaches the maximum environmental protection of the requirement of the design life, the Corrosion resistance of the anticorrosive coating with the same film thickness is improved by more than 30 percent, the adhesion with a base material is improved by more than 10MPa, and the anticorrosive coating meets the requirements of ISO12944 paintings and varnishes-correction protection of steel structures by protective paint systems (the Corrosion protection of a colored paint and varnish system to a steel structure), NACE SP0198-2010 Corrosion control under an insulating layer and a fireproof material (the international standard), GB/T37183-, SH/T3022 plus 2011 anticorrosion design specification for petrochemical equipment and pipeline coatings, SY/T0320-2010 technical standard for outer anticorrosion layers of steel storage tanks, HG/T20679 plus 2014 standard for outer anticorrosion design specification for chemical equipment pipelines, and the like.
2. The heat insulation performance is remarkable. In the standard state of the product of the embodiment, each index is far higher than GB 50264 supplement 2013 design specification of industrial equipment and pipeline heat insulation engineering, GB/T4272 supplement 2008 general rule of equipment and pipeline heat insulation technology, GB/T8175 supplement 2008 guide rule of equipment and pipeline heat insulation design, GB/T37796 supplement 2019 test method (calorimetry method) for heat conductivity of heat-insulating refractory material, GB/T18433 supplement 2001 thermal performance requirement of air freight heat-insulating container, GB/T38585 supplement 2020 insulation technical condition of town heat supply direct-buried pipeline joint, GB/T25261 supplement 2018 reflective heat-insulating coating for building, GB50176-2016 design specification-design specification for civil building thermal engineering, DL/T5750 supplement 2017 supplement construction technical specification for water engineering concrete surface heat insulation, HG/T5182-containing 2017 heat-insulating coating for petroleum and chemical equipment, JG/T517-containing 2017 hollow glass bead heat-insulating material for engineering, HG/T20514-containing 2014 instrument and pipeline heat tracing and heat insulation design specification, JGJ T359-containing 2015 building reflective heat-insulating coating application technical specification, and defined standard requirements of specified thermal calculation basic parameters and methods and heat insulation design requirements;
3. good freezing and freezing resistance. According to ISO 16546-2012 building insulation products for building applications, Freeze Resistance Test, SAE AMS 1431D-2012 Compound, Solid Runaway and Taxiway Deicing/Anti-Icing-Compound, ASTM D2243-1995(2014) Standard Test Method for Freeze-Thaw Resistance of Water-soluble coating Freeze Resistance, CGSB 1-GP-71METH 108.3-1979 methods D' Essai Des sources tests, The numerical requirements of indexes such as international standards, European Union standards, Chinese standards, industry standards and the like, such as GB T33011-2016 (determination of freeze-thaw resistance of heat insulation products for buildings) and GB/T3810.12-2006 (determination of frost resistance of ceramic tile test method part 12).
4. The workability is excellent. The product of the invention has low molecular weight, low viscosity and high reaction activity, and can effectively realize the construction modes of roller coating, spraying, blade coating, brush coating, shower coating and the like on the surfaces of different anisotropic materials with different shapes in various high-cold, humid and high-low temperature environments. The workability meets the international standard ISO 12944-52018-02 < colored paint and varnish-protective coating system (for corrosion protection of steel structures-part 5: protective coating system), < GB/T37195 & 2018 < technical specification for corrosion-resistant repair operation of pipelines by using resin as base material > < GB/T51241-2017 < technical specification for external corrosion-resistant repaired openings of pipelines >, </GB/T34681 & 2017 < determination of matching and recoatability of colored paint and varnish coating > < SY/T5918 & 2017 < technical specification for repairing external corrosion-resistant layer of buried steel pipelines >, and the like.
5. Has wide application prospect. The coating can be widely applied to the surfaces of metal components, oil gas tanks, underground pipelines, outdoor pipelines, concrete, outdoor various equipment, containers and the like in capital construction engineering in the fields of petroleum industry, chemical industry, food industry, coating industry, civil engineering and building industry, textile industry, paper industry, pharmaceutical industry, drainage treatment process and the like, can provide high-performance long-acting anticorrosion protection for a base material, can remarkably reduce cold and hot convection and radiation heat transfer generated by the surface of the base material and the internal environment, accelerates self heat dissipation, reduces cold and hot loads of hardware and the base material, has different reflectivity, absorption and barrier and conduction characteristics for different radiation heat sources, solid heat sources and freezing sources, and has remarkable effect.
6. The invention has good basic solidity and prevents the deformation of the base material, has considerable protectiveness to the base material under the standard state, unique heat insulation and anti-freezing performance, has the characteristics of keeping the size, shape stability and durability of the base material, has different reflectivity, absorption and barrier conduction characteristics for different radiation heat sources (ultraviolet rays and infrared rays), solid (high temperature) heat sources and freezing sources, well avoids the deformation of the outdoor base material caused by temperature difference change, such as expansion with heat and contraction with cold and the like, effectively prolongs the service life of the base material and can keep the base material for a long time.
7. The invention has simple and convenient production and preparation process, does not need complex processes such as pressurization, heat preservation, polymerization reaction and the like, is convenient to package, store and transport, and is safe to use, thereby reducing the industrialization cost and being beneficial to industrial production.
While embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, which are intended to be illustrative rather than limiting, and many modifications may be made by those skilled in the art without departing from the spirit and the scope of the invention as defined by the appended claims.
Claims (8)
1. The heat-insulation and heat-preservation polyurethane anticorrosive paint is characterized in that the paint is prepared by mixing a component A and a component B which are prepared in advance, wherein the weight ratio of the component A to the component B is 1: 0.2-0.4, wherein,
the component A comprises the following components in percentage by mass: 30-50% of polyurethane, 3-5% of epoxy resin, 5-8% of fluorocarbon resin, 10-15% of heat-insulating and heat-preserving composite bone paste, 3-5% of reflective aggregate, 10-15% of filler, 1-5% of pigment, 0.5-1% of fatty acid amide, 0.5-1% of higher fatty alcohol, 1-2% of dispersant, 3-5% of anti-rust pigment and 10-15% of diluent;
the component B is as follows: an isocyanate crosslinking agent;
wherein the polyurethane comprises at least one of acrylic modified polyurethane resin, cage type polysilsesquioxane modified polyurethane resin and organic silicon modified polyurethane resin;
the epoxy resin is polyether sulfone modified epoxy resin or dimethyl hydantoin epoxy resin with the epoxy equivalent of 450-550;
the fluorocarbon resin is polyvinylidene fluoride type fluorocarbon resin or copolymerization type fluorocarbon resin;
the heat-insulating composite bone slurry is composed of polyurethane resin, ceramic fiber, sepiolite, mica powder, perlite, silicon micropowder, improved soil and a dispersing agent, and the solid content of the heat-insulating composite bone slurry is 30% -50%.
2. The heat-insulating and heat-preserving polyurethane anticorrosive paint according to claim 1,
the ceramic fiber is polycrystalline zirconia soluble wire throwing ceramic fiber with the diameter of 2-5 mu m and the length of 30-100 mm;
the sepiolite is beta-sepiolite;
the mica powder is 1250-2000 mesh wet-process flaky sericite;
the perlite has an expansion multiple index value of more than or equal to 6.0 times and is SiO2The first-class expanded perlite with the index value of more than or equal to 68 percent;
the silicon micro powder is SiO with the particle size of less than 1 mu m and the spherical particle size of 30-50 nm2The index value is more than or equal to 99.5 percent, and the index value is spherical silicon oxide powder obtained by the heat treatment method;
the improved soil is polystyrene foam light soil.
3. The heat-insulating heat-preserving polyurethane anticorrosive paint as claimed in claim 1, wherein the reflective aggregate has a median particle diameter D50 of 25-40 μm and a true density (g/cm)3) 0.30 +/-0.02-0.4 +/-0.02% of aluminosilicate hollow microspheres or polycrystalline glass hollow microspheres.
4. The heat-insulating and heat-preserving polyurethane anticorrosive paint according to claim 1,
the filler is one of calcined kaolin, natural barium sulfate and quartz powder;
the pigment is one or a mixture of more of titanium dioxide, lithopone and calcium carbonate.
5. The heat-insulating and heat-preserving polyurethane anticorrosive paint according to claim 1,
the fatty acid amide is erucamide or ethylene bis-stearamide;
the higher aliphatic alcohol is carbonyl straight-chain primary alcohol type higher aliphatic alcohol with the carbon number of C14-C30 or higher aliphatic alcohol of polyoxyethylene polyoxypropylene block polymer;
the dispersing agent is a solution dispersing agent of polycarboxylic acid and polysiloxane copolymer.
6. The heat-insulating and heat-preserving polyurethane anticorrosive paint according to claim 1,
the antirust pigment is zinc benzoate or zinc phosphomolybdate or titanium phosphate;
the diluent is one or a combination of more of aromatic hydrocarbons, acetate and ketones without hydroxyl end, water and acid residue;
the isocyanate crosslinking agent is hexamethylene diisocyanate trimer aliphatic polyisocyanate or hexamethylene diisocyanate biuret aliphatic polyisocyanate.
7. A preparation method of the heat-insulating and heat-preserving polyurethane anticorrosive paint as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
preparing component A and preparing an isocyanate crosslinking agent as component B; and
during construction, the component B is gradually added into the component A under stirring according to a preset dosage ratio, the component A is added while stirring, powder agglomeration and bottom sinking are avoided until the two components are uniformly mixed, and the mixture is filtered and discharged to obtain a finished product of the heat-insulating and heat-preserving polyurethane anticorrosive paint;
wherein the preparation process of the component A is as follows:
preparing heat insulation composite bone slurry;
according to the formula dosage, adding a diluent accounting for 20-30% of the total dosage, a polyurethane resin accounting for 30-40% of the total dosage, an epoxy resin accounting for 50% of the total dosage and a fluorocarbon resin accounting for 50% of the total dosage into a dispersion mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed to sequentially add a filler, a pigment, a fatty acid amide accounting for 50% of the total dosage, a higher fatty alcohol accounting for 50% of the total dosage and a dispersing agent accounting for 30% of the total dosage, keeping the rotating speed to avoid powder agglomeration and bottom sinking, after the adding is finished, adjusting the rotating speed to 1600-1800 rmp, uniformly stirring at a high speed, adjusting the rotating speed to 600-800 rmp, starting to add a reflection aggregate, keeping the rotating speed, stopping the machine until the materials are uniformly mixed and dispersed, and preparing a standby solution;
adding the rest of the diluent, the polyurethane resin, the epoxy resin, the fluorocarbon resin, the antirust pigment and the rest of the dispersant into a dispersion mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed, sequentially adding the prepared heat insulation composite bone slurry, the fatty acid amide and the higher fatty alcohol, adjusting the rotating speed to 1600-1800 rmp, performing high-speed stirring and dispersion at the rotating speed of 800-1200 rmp for 2-3 hr, adjusting the rotating speed to 600-800 rmp, starting adding the prepared standby solution, keeping the rotating speed for continuous dispersion for 1-1.5 hr, stopping, filtering and discharging to obtain the component A of the heat insulation polyurethane anticorrosive paint.
8. The preparation method of the heat-insulating and heat-preserving polyurethane anticorrosive paint as claimed in claim 7, wherein the preparation of the heat-insulating and heat-preserving composite bone slurry specifically comprises: in an integrated reaction kettle with the functions of feeding, vacuum feeding, dripping, magnetic material powder quantitative feeding, weighing and metering, mixing and stirring, according to the formula dosage of the heat-insulation and heat-preservation composite bone slurry, 30-40% of diluent accounting for the total dosage is added into polyurethane accounting for 20-30% of the total dosage, after the polyurethane is uniformly dispersed and stirred at the rotating speed of 800-1200 rmp, the rotating speed is adjusted to 200-300 rmp, ceramic fiber, sepiolite, mica powder, perlite, silicon micropowder, improved soil and 40% of dispersing agent accounting for the total dosage are sequentially added while stirring, the rotating speed is maintained to avoid powder agglomeration and bottom sinking, after the addition is finished, the rotating speed is adjusted to 1200-1500 rmp, high-speed stirring and dispersing are carried out, and the high-speed stirring and dispersing are carried out until the uniform dispersion is carried out, so that the heat-insulation and heat-preservation composite bone slurry is obtained.
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| CN114836099A (en) * | 2022-04-29 | 2022-08-02 | 江苏金陵特种涂料有限公司 | Super-weather-resistant heat-insulating reflective coating and preparation method thereof |
| CN117487432B (en) * | 2023-11-09 | 2024-05-03 | 江苏美标家居科技有限公司 | Fireproof heat-insulating coating and preparation process thereof |
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