CN114350249A - Propylene polyurethane middle coating and preparation method thereof - Google Patents
Propylene polyurethane middle coating and preparation method thereof Download PDFInfo
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- CN114350249A CN114350249A CN202210113735.XA CN202210113735A CN114350249A CN 114350249 A CN114350249 A CN 114350249A CN 202210113735 A CN202210113735 A CN 202210113735A CN 114350249 A CN114350249 A CN 114350249A
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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
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- 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
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- 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
- 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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- 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
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- C09D7/60—Additives non-macromolecular
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
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- C08K2003/327—Aluminium phosphate
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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
- C08K3/32—Phosphorus-containing compounds
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Abstract
The invention discloses a propylene polyurethane middle coat and a preparation method thereof, and relates to the technical field of paint manufacturing, wherein the propylene polyurethane middle coat is prepared from the following raw materials in parts by weight: 80-120 parts of water, 1-3 parts of preservative, 3-6 parts of dispersant, 1-4 parts of defoaming agent, 40-60 parts of aluminum tripolyphosphate, 40-60 parts of modified zinc phosphate, 45-55 parts of barium metaborate, 15-30 parts of mica powder, 750 parts of acrylic polyurethane 450-doped materials, 8-14 parts of film-forming additive, 15-25 parts of block drying, 1-3 parts of wetting agent, 951-3 parts of multifunctional 951-3 parts of thickener 9352-3 parts of thickener, 602-4 parts of thickener, 10-20 parts of flash rust preventive and 3-5 parts of carbon black; according to the invention, aluminum triphosphate, modified zinc phosphate, barium metaborate, mica powder, fillers of propylene polyurethane and auxiliaries are added in the formula, so that the corrosion resistance and the rust resistance of the coating are greatly improved, and moreover, the acrylic acid content is increased, so that the service life of the propylene polyurethane intermediate coating is greatly prolonged.
Description
Technical Field
The invention relates to the technical field of paint manufacturing, in particular to a propylene polyurethane middle coating and a preparation method thereof.
Background
The steel structure has the advantages of light weight, high strength, convenient construction, good ductility and shock resistance and the like, is increasingly widely used in the building industry, and particularly shows strong vitality in the aspects of super high-rise and large-span buildings and the like.
However, the steel structure material has the disadvantages of poor fire resistance and corrosion resistance, and if the steel structure material is not subjected to corrosion and rust prevention protection, the steel structure building is easy to collapse, so that accidents are caused. For this reason, in the steel structure anticorrosion engineering, the coating is always the most important, most economical and effective anticorrosion method.
However, the performances of corrosion resistance, rust resistance, water resistance and the like of the existing paint are mostly unsatisfactory, so that the steel structure needs to be rusted soon after coating construction, is not resistant to water soaking and the like, and the problems can cause that the safety of the steel structure in the using process can not be ensured, and even cause serious consequences; therefore, there is a need for improved coatings for steel structures.
Disclosure of Invention
The invention provides a propylene polyurethane middle coating and a preparation method thereof, wherein aluminum tripolyphosphate, modified zinc phosphate, barium metaborate, mica powder, filler and assistant of propylene polyurethane are added in the formula, so that the corrosion resistance and rust resistance of the coating are greatly improved, the acrylic acid content is increased, the service life of the propylene polyurethane middle coating is greatly prolonged, the corrosion resistance, rust resistance, ageing resistance and acid and alkali resistance of the coating are also well improved, and the technical problem of steel structure use safety caused by insufficient corrosion resistance, rust resistance, water resistance and other properties of the existing coating can be effectively solved.
According to one aspect of the invention, a propylene polyurethane middle coating is provided, which is composed of the following raw materials in parts by weight:
80-120 parts of water, 1-3 parts of preservative, 3-6 parts of dispersant, 1-4 parts of defoaming agent, 40-60 parts of aluminum tripolyphosphate, 40-60 parts of modified zinc phosphate, 45-55 parts of barium metaborate, 15-30 parts of mica powder, 750 parts of acrylic polyurethane 450-doped materials, 8-14 parts of film-forming additive, 15-25 parts of block drying, 1-3 parts of wetting agent, 951-3 parts of multifunctional 951-3 parts of thickener 9352-3 parts of thickener, 602-4 parts of thickener, 10-20 parts of flash rust inhibitor and 3-5 parts of carbon black color paste.
Further, the preservative is one of 2-benzisothiazolin-3-one, hexahydro-1, 3, 5-triethyl-S-triazine, 2-dibromo-3- (trivalent) nitrilopropionamide and 1- (3-chloroallyl) -3,5, 7-triaza-1-azoniaadamantane chloride.
The defoaming agent is one or more than two of phenethyl alcohol oleate, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether and polyoxypropylene glycerol ether.
Further, the ratio of the preservative to the defoamer is 1: 1.2-1.4.
Further, the ratio of the propylene polyurethane to the propylene polyurethane intermediate coat is 0.6-0.695: 1.
according to another aspect of the present invention, there is provided a method for preparing a propylene polyurethane middle coating, comprising the steps of:
s1, putting the aluminum tripolyphosphate, the modified zinc phosphate, the barium metaborate, the mica powder and the dried blocks into a mixing stirrer, uniformly stirring for 10min at 260 revolutions per minute of 200-;
s2, uniformly stirring in a grinding tank of a grinder, grinding for 30-40min, and filtering twice by using a 200-mesh filter screen to obtain a mixture A;
s3, adding the mixture A obtained in the step S2, water, acrylic polyurethane, a wetting agent, a multifunctional 95, an anti-flash rust agent and carbon black color paste into a mixing stirrer according to the proportion, slowly heating to 35-40 ℃, and mixing and stirring for 15-25min at the rotating speed of 350-380 r/min;
s4, adding the preservative, the dispersing agent, the film-forming aid, the thickening agent 935 and the thickening agent 60 into the mixture obtained in the step S3, mixing and stirring for 25-35min, then raising the temperature to 55-65 ℃, adding the defoaming agent, and continuing mixing and stirring for 5-10min to obtain the finished product of the propylene polyurethane floating coat.
Further, the mixing stirrer comprises a stirring tank, a heat-insulating jacket is sleeved on the periphery of the stirring tank, a first stirring and dispersing mechanism for mixing and stirring raw materials is arranged inside the stirring tank, a first raw material feeding tank, a second raw material feeding tank and a third raw material feeding tank are arranged at the top of one side of the stirring tank, the first raw material feeding tank and the second raw material feeding tank are respectively connected with the stirring tank through pipelines, and the third raw material feeding tank is connected with the second raw material feeding tank through a pipeline;
one side of the top of the stirring tank is connected with an opening and closing door, the bottom of the stirring tank is provided with a discharge hole, and the discharge hole is provided with an electric valve for controlling the opening degree and opening and closing of the discharge hole;
the stirring dispersion mechanism I comprises a main shaft I and a plate I arranged on the main shaft I;
the upper end of the first main shaft extends to the upper part of the stirring tank and is connected with a first rotary driving mechanism for driving the first main shaft to rotate.
Further, a stirring and dispersing mechanism II for mixing and stirring the raw materials is arranged in the raw material feeding tank II;
a second stirring and dispersing mechanism which comprises a second main shaft and a second plate arranged on the second main shaft;
the upper end of the second main shaft extends to the upper part of the second raw material feeding tank and is connected with a second rotary driving mechanism for driving the second main shaft to rotate.
Furthermore, the pipelines of the first raw material feeding tank and the third raw material feeding tank are respectively provided with a valve for controlling the opening degree and the opening and closing of the raw material feeding tank and the raw material feeding tank.
Further, the top of the stirring tank is also provided with a temperature sensor for detecting the temperature of the mixture.
The invention has the beneficial effects that:
according to the invention, aluminum triphosphate, modified zinc phosphate, barium metaborate, mica powder, acrylic polyurethane filler and assistant are added in the formula, so that the corrosion resistance and the rust resistance of the coating are greatly improved, the acrylic acid content is increased, the service life of the acrylic polyurethane intermediate coating is greatly prolonged, and the corrosion resistance, the rust resistance, the ageing resistance and the acid and alkali resistance of the coating are also well improved.
Drawings
FIG. 1 is a schematic flow diagram of the process for preparing a propylene urethane basecoat of the present invention;
FIG. 2 is a schematic view of the overall construction of the mixing agitator of the present invention;
FIG. 3 is a schematic structural diagram of a stirring and dispersing mechanism of the present invention.
FIG. 4 is a schematic structural view of a second stirring and dispersing mechanism of the present invention.
In the figure: 100. a stirring tank; 101. opening and closing the door; 102. a heat-preserving jacket; 103. a discharge port; 104. a temperature sensor; 105. a first main shaft; 106. a first rotary driving mechanism; 107. a first plate sheet; 108. a third raw material feeding tank; 109. a second rotary driving mechanism; 111. a first raw material feeding tank; 112. a second main shaft; 113. a second plate sheet; 114. and a second raw material feeding tank.
Detailed Description
The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thereby implement the subject matter described herein, and are not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as needed. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with respect to some examples may also be combined in other examples.
Example 1
The embodiment provides a propylene polyurethane middle coat, which is composed of the following raw materials in parts by weight:
80 parts of water, 1 part of preservative, 3 parts of dispersant, 1.3 parts of defoamer, 40 parts of aluminum tripolyphosphate, 40 parts of modified zinc phosphate, 45 parts of barium metaborate, 15 parts of mica powder, 450 parts of propylene polyurethane, 8 parts of film-forming additive, 15 parts of block drying, 1 part of wetting agent, 951 parts of multifunctional agent, 9352 parts of thickening agent, 602 parts of thickening agent, 10 parts of flash rust inhibitor and 3 parts of carbon black color paste.
Further, the preservative is 2-benzisothiazolin-3-one.
Further, the defoaming agent is phenethyl alcohol oleate.
Further, the ratio of the preservative to the defoamer is 1: 1.3.
further, the ratio of the acrylic polyurethane to the acrylic polyurethane intercoat is 0.627: 1.
Example 2
The embodiment provides a propylene polyurethane middle coat, which is composed of the following raw materials in parts by weight:
120 parts of water, 3 parts of preservative, 6 parts of dispersant, 4 parts of defoamer, 60 parts of aluminum tripolyphosphate, 60 parts of modified zinc phosphate, 55 parts of barium metaborate, 30 parts of mica powder, 750 parts of propylene polyurethane, 14 parts of film-forming additive, 25 parts of block dry, 3 parts of wetting agent, 953 parts of multifunctional, 9353 parts of thickening agent, 604 parts of thickening agent, 20 parts of flash rust inhibitor and 5 parts of carbon black color paste.
Further, the preservative is hexahydro-1, 3, 5-triethyl-S-triazine.
Further, the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.
Further, the ratio of the preservative to the defoamer is 1: 1.34.
further, the ratio of the acrylic polyurethane to the acrylic polyurethane intercoat was 0.644: 1.
Example 3
The embodiment provides a propylene polyurethane middle coat, which is composed of the following raw materials in parts by weight:
80 parts of water, 1 part of preservative, 3 parts of dispersant, 1.2 parts of defoamer, 60 parts of aluminum tripolyphosphate, 60 parts of modified zinc phosphate, 55 parts of barium metaborate, 30 parts of mica powder, 750 parts of propylene polyurethane, 14 parts of film-forming additive, 25 parts of block drying, 3 parts of wetting agent, 953 parts of multifunctional, 9353 parts of thickener, 604 parts of thickener, 20 parts of flash rust inhibitor and 5 parts of carbon black color paste.
Further, the preservative is 2, 2-dibromo-3- (trivalent) nitrogen-based propionamide.
Further, the defoaming agent is a mixture of phenethyl alcohol oleate and polyoxyethylene polyoxypropylene pentaerythritol ether.
Further, the ratio of the preservative to the defoamer is 1: 1.2.
further, the ratio of the acrylic urethane to the acrylic urethane intercoat was 0.671: 1.
Example 4
The embodiment provides a propylene polyurethane middle coat, which is composed of the following raw materials in parts by weight:
120 parts of water, 3 parts of preservative, 6 parts of dispersant, 4 parts of defoamer, 60 parts of aluminum tripolyphosphate, 60 parts of modified zinc phosphate, 55 parts of barium metaborate, 30 parts of mica powder, 700 parts of propylene polyurethane, 8 parts of film-forming additive, 15 parts of block drying, 1 part of wetting agent, 951 parts of multifunctional agent, 9352 parts of thickening agent, 602 parts of thickening agent, 10 parts of flash rust inhibitor and 3 parts of carbon black color paste.
Further, the preservative is 2-benzisothiazolin-3-one.
Further, the defoaming agent is polyoxypropylene glycerol ether.
Further, the ratio of the preservative to the defoamer is 1: 1.34.
further, the ratio of the acrylic polyurethane to the acrylic polyurethane intercoat was 0.648: 1.
Example 5
The embodiment provides a propylene polyurethane middle coat, which is composed of the following raw materials in parts by weight:
80 parts of water, 1 part of preservative, 3 parts of dispersant, 1.35 parts of defoamer, 40 parts of aluminum tripolyphosphate, 40 parts of modified zinc phosphate, 45 parts of barium metaborate, 30 parts of mica powder, 670 parts of propylene polyurethane, 8 parts of film-forming additive, 15 parts of block dry, 3 parts of wet, 951 parts of multifunctional, 9353 parts of thickener, 602 parts of thickener, 20 parts of flash rust inhibitor and 5 parts of carbon black color paste.
Further, the preservative is 2-benzisothiazolin-3-one.
Further, the defoaming agent is polyoxyethylene polyoxypropylene ether.
Further, the ratio of the preservative to the defoamer is 1: 1.35.
further, the acrylic polyurethane accounts for 0.693:1 of the acrylic polyurethane middle coating ratio.
The experimental process comprises the following steps:
taking the processed products in the above examples as experimental examples 1-5, designing three comparative examples, wherein comparative example 1 is prepared without adding flash rust inhibitor, comparative example 2 is prepared without adding aluminum tripolyphosphate, modified zinc phosphate, barium metaborate and mica powder, and comparative example 2 is prepared by greatly reducing propylene polyurethane, and testing the acid-base resistance and rust resistance of the coatings prepared in the above experimental examples and comparative examples, which are coated on the steel structure, are respectively shown in the following table 1:
table 1:
as can be seen from the above experimental data, in examples 1 to 5 in which the flash rust preventive, the aluminum tripolyphosphate, the modified zinc phosphate, the barium metaborate and the mica powder are added and the content of the acryl urethane is increased, the properties such as acid resistance, alkali resistance, adhesion, salt spray resistance and water resistance are remarkably improved, except that the drying time is slightly lengthened, and the properties of the acryl urethane intercoat prepared using the formulation of example 4 are the best for examples 1 to 5, so the formulation of example 4 is used as the most preferred example.
Example 6
The embodiment also provides a preparation method of the acrylic polyurethane middle coating, which comprises the following steps:
s1, putting the aluminum tripolyphosphate, the modified zinc phosphate, the barium metaborate, the mica powder and the dried blocks into a mixing stirrer, uniformly stirring for 10min at 240 r/min, then pouring into a drying cylinder for drying, and keeping the drying temperature at 80 ℃;
s2, uniformly stirring in a grinding tank of a grinder, grinding for 30min, and filtering twice by using a 200-mesh filter screen to obtain a mixture A;
s3, adding the mixture A obtained in the step S2, water, acrylic polyurethane, a wetting agent, a multifunctional 95, an anti-flash rust agent and carbon black color paste into a mixing stirrer according to the proportion, slowly heating to 40 ℃, and mixing and stirring for 20min at the rotating speed of 360 r/min;
s4, adding the preservative, the dispersing agent, the film-forming aid, the thickening agent 935 and the thickening agent 60 into the mixture obtained in the step S3, mixing and stirring for 30min, then raising the temperature to 55 ℃, adding the defoaming agent, and continuing mixing and stirring for 10min to obtain the finished product of the acrylic polyurethane floating coat.
As shown in fig. 2 to 4, in order to obtain stable performance of the product and to average the quality of the product, the present invention provides a mixing agitator applied to the above steps, comprising:
the stirring tank 100 is provided with a heat-insulating jacket 102, a first stirring and dispersing mechanism for mixing and stirring raw materials is arranged in the stirring tank 100, a first raw material feeding tank 111, a second raw material feeding tank 114 and a third raw material feeding tank 108 are arranged at the top of one side of the stirring tank 100, the first raw material feeding tank 111 and the second raw material feeding tank 114 are respectively connected with the stirring tank 100 through pipelines, and the third raw material feeding tank 108 is connected with the second raw material feeding tank 114 through a pipeline;
one side of the top of the stirring tank 100 is connected with an opening and closing door 101, the bottom of the stirring tank is provided with a discharge hole 103, and the discharge hole 103 is provided with an electric valve for controlling the opening degree and opening and closing of the discharge hole 103;
the first stirring and dispersing mechanism comprises a first main shaft 105 and a first plate 107 arranged on the first main shaft 105;
the upper end of the first main shaft 105 extends to the upper part of the stirring tank 100, and is connected with a first rotary driving mechanism 106 for driving the first main shaft 105 to rotate.
In the embodiment of the invention, a second stirring and dispersing mechanism for mixing and stirring raw materials is arranged in the second raw material feeding tank 114;
a second stirring and dispersing mechanism which comprises a second main shaft 112 and a second plate 113 arranged on the second main shaft 112;
the upper end of the second main shaft 112 extends to the upper part of the second raw material feeding tank 114, and is connected with a second rotary driving mechanism 109 for driving the second main shaft 112 to rotate.
In the embodiment of the invention, the pipelines of the first raw material feeding tank 111 and the third raw material feeding tank 108 are respectively provided with valves for controlling the opening and the opening of the raw material feeding tanks.
In the embodiment of the present invention, the first rotary driving mechanism 106 and the second rotary driving mechanism 109 can be selected from, but not limited to, a driving motor and a gear pump.
In the embodiment of the present invention, a temperature sensor 104 for detecting the temperature of the mixture is further installed on the top of the stirring tank 100.
In the present invention, the stirring tank 100 is further provided with a temperature control unit for controlling the temperature of the reactant.
The temperature control unit is a heater arranged in the stirring tank 100 or a circulating heat conduction pipe arranged outside the stirring tank 100, and a heat conduction medium is introduced into the circulating heat conduction pipe. The temperature control unit controls the temperature of the internal reactant by controlling the power of the heater or the temperature of the heat-conducting medium.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
The embodiments of the present invention have been described with reference to the drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention and the protection scope of the claims.
Claims (10)
1. The propylene polyurethane middle coat is characterized by comprising the following raw materials in parts by weight:
2. the acryl urethane center coat according to claim 1, wherein the preservative is one of 2 benzisothiazolin-3-one, hexahydro-1, 3, 5-triethyl-S-triazine, 2-dibromo-3- (trivalent) nitrilopropionamide, and 1- (3-chloroallyl) -3,5, 7-triaza-1-azoniaadamantane chloride.
3. The propylene polyurethane middle coating according to claim 1, wherein the defoaming agent is one or more of phenylethanololeate, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether and polyoxypropylene glycerol ether.
4. The propylene polyurethane floating coat according to claim 1, wherein the ratio of the preservative to the defoamer is 1: 1.2-1.4.
5. The propylene polyurethane floating coat according to claim 1, wherein the ratio of the propylene polyurethane to the propylene polyurethane floating coat is 0.6-0.695: 1.
6. A process for the preparation of a propylene polyurethane basecoat as claimed in any one of claims 1 to 5 comprising the steps of:
s1, putting the aluminum tripolyphosphate, the modified zinc phosphate, the barium metaborate, the mica powder and the dried blocks into a mixing stirrer, uniformly stirring for 10min at 260 revolutions per minute of 200-;
s2, uniformly stirring in a grinding tank of a grinder, grinding for 30-40min, and filtering twice by using a 200-mesh filter screen to obtain a mixture A;
s3, adding the mixture A obtained in the step S2, water, acrylic polyurethane, a wetting agent, a multifunctional 95, an anti-flash rust agent and carbon black color paste into a mixing stirrer according to the proportion, slowly heating to 35-40 ℃, and mixing and stirring for 15-25min at the rotating speed of 350-380 r/min;
s4, adding the preservative, the dispersing agent, the film-forming aid, the thickening agent 935 and the thickening agent 60 into the mixture obtained in the step S3, mixing and stirring for 25-35min, then raising the temperature to 55-65 ℃, adding the defoaming agent, and continuing mixing and stirring for 5-10min to obtain the finished product of the propylene polyurethane floating coat.
7. The preparation method of the propylene polyurethane middle coating according to claim 6, wherein the mixing stirrer comprises a stirring tank (100), a heat-insulating jacket (102) is sleeved on the periphery of the stirring tank (100), a first stirring and dispersing mechanism for mixing and stirring raw materials is arranged inside the stirring tank (100), a first raw material feeding tank (111), a second raw material feeding tank (114) and a third raw material feeding tank (108) are arranged at the top of one side of the stirring tank (100), the first raw material feeding tank (111) and the second raw material feeding tank (114) are respectively connected with the stirring tank (100) through pipelines, and the third raw material feeding tank (108) is connected with the second raw material feeding tank (114) through pipelines;
one side of the top of the stirring tank (100) is connected with an opening and closing door (101), the bottom of the stirring tank is provided with a discharge hole (103), and the discharge hole (103) is provided with an electric valve for controlling the opening degree and opening and closing of the discharge hole (103);
the first stirring and dispersing mechanism comprises a first main shaft (105) and a first plate (107) arranged on the first main shaft (105);
the upper end of the first main shaft (105) extends to the upper part of the stirring tank (100), and is connected with a first rotary driving mechanism (106) for driving the first main shaft (105) to rotate.
8. The preparation method of the propylene polyurethane middle coating according to claim 6, wherein a second stirring and dispersing mechanism for mixing and stirring raw materials is arranged inside the second raw material feeding tank (114);
a second stirring and dispersing mechanism which comprises a second main shaft (112) and a second plate (113) arranged on the second main shaft (112);
the upper end of the second main shaft (112) extends to the upper part of the second raw material feeding tank (114), and is connected with a second rotary driving mechanism (109) for driving the second main shaft (112) to rotate.
9. The method for preparing the acrylic polyurethane floating coat according to claim 6, wherein the pipelines of the first raw material feeding tank (111) and the third raw material feeding tank (108) are respectively provided with valves for controlling the opening degree and the opening and closing of the pipelines.
10. The preparation method of the acrylic polyurethane floating coat according to claim 6, wherein a temperature sensor (104) for detecting the temperature of the mixture is further installed on the top of the stirring tank (100).
Priority Applications (1)
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