CN115466562A - Wharf steel column anti-corrosion coating and preparation method thereof - Google Patents
Wharf steel column anti-corrosion coating and preparation method thereof Download PDFInfo
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- CN115466562A CN115466562A CN202211083693.6A CN202211083693A CN115466562A CN 115466562 A CN115466562 A CN 115466562A CN 202211083693 A CN202211083693 A CN 202211083693A CN 115466562 A CN115466562 A CN 115466562A
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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
-
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
Abstract
The invention relates to an anti-corrosion coating for a steel column of a wharf, which is prepared from a raw material A and a raw material B; the component A comprises: 35-50 parts of polyoxypropylene ether glycol, 5-10 parts of dibutyl phthalate and 35-50 parts of diphenylmethane diisocyanate; and B component: 55-60 parts of 2-functionality D230 series amino-terminated polyether, 0.1-0.3 part of triethylhexyl phosphoric acid, 0.05-0.2 part of polyether defoaming agent, 3-5 parts of 2-hydroxy-4-methoxybenzophenone and 40-60 parts of 1000-mesh silicon carbide powder. The preparation method comprises the following steps: preparing a component A and a component B; directly synthesizing a polyurea coating by using spraying equipment by adopting a one-step method, wherein the material output ratio of the component A to the component B is 1; and (3) spraying the material generated by the reaction on a PVC plastic plate coated with a release agent, wherein the thickness of the film is 2mm, and curing the sprayed coating at normal temperature for about one week.
Description
Technical Field
The invention belongs to the technical field of corrosion prevention, and particularly relates to a wharf steel column anticorrosive coating and a preparation method thereof.
Background
The corrosion prevention of wharf steel columns is a serious problem in the current maritime work field, and the corrosion to steel is more serious in the relatively severe ecological environment of the ocean. Huge loss is caused by corrosion every year, and the common anticorrosive paint needs to perform sand blasting treatment on the metal surface before construction, so that the cost is high, and the requirement is difficult to reach in actual engineering construction. The coating with rust conversion active groups is developed, so that the corrosion degree of wharf steel columns can be reduced, and the service life of wharf steel columns can be prolonged.
The rust-bearing coating is generally prepared by adding a rust conversion agent to react with iron oxide in a rust layer so as to convert a loose and porous rust layer into a complex or chelate compound which is compact and has good bonding force with a substrate. Commonly used rust converting agents include phosphoric acid, tannic acid, phytic acid. These rust converting agents are mostly acids, and thus the amount of the rust converting agent is critical. The conversion agent can not react with all iron oxides with small dosage. The conversion agent is used in an excessive amount, and is acidic, so that the conversion agent is easy to cause under-paint-film corrosion or interface corrosion and causes greater damage to metals. Meanwhile, because the conversion agent only reacts with the rust layer, the paint film is easy to become brittle and easy to peel and fall off.
The problem that a novel stable coating which has no corrosion, no pollution and rust-convertible active group is urgently needed to be solved at present is researched and developed for meeting the higher requirement of wharf steel column corrosion prevention.
Disclosure of Invention
The invention mainly aims to provide an anti-corrosion coating for a wharf steel column and a preparation method thereof, and the anti-corrosion coating has the advantages of environmental friendliness, strong adhesive force, ageing resistance and the like.
According to the wharf steel column anticorrosive coating and the preparation method thereof, the preparation raw materials of the wharf steel column anticorrosive coating comprise a component A and a component B; the material output ratio of the component A to the component B is 1.5;
the component A comprises the following raw materials in parts by weight: 40-60 parts of polytetrahydrofuran glycol, 5-15 parts of dioctyl adipate and 35-60 parts of isophorone diisocyanate;
the component B comprises the following raw materials in parts by weight: 60-80 parts of 2-functionality D400 series amino-terminated polyether, 0.1-0.2 part of fatty acid polyglycol ester, 0.05-0.25 part of natural oil, 3-6 parts of phenyl o-hydroxybenzoate and 10-25 parts of aluminum tripolyphosphate.
According to the invention, the anti-corrosion coating for the wharf steel column and the preparation method thereof, which are provided by the invention, comprises the following steps:
the preparation method of the component A comprises the following steps:
(1) 40-60 parts of polytetrahydrofuran diol and 5-15 parts of dioctyl adipate are added into the reaction kettle.
(2) After the temperature of the reaction kettle is raised to 60-90 ℃, starting a vacuum system, and simultaneously introducing nitrogen from the bottom of the reaction kettle to remove moisture of materials in the reaction kettle;
(3) After 0.4 to 1 hour, after the moisture content of the materials in the reaction kettle is detected to be less than 0.05 percent, the temperature is reduced to 45 to 60 ℃, 35 to 60 parts of isophorone diisocyanate are added and stirred;
(4) Heating to 75-90 ℃ for reaction for 3-6 hours;
(5) Cooling to below 60 deg.C, filtering, discharging and packaging.
The preparation method of the component B comprises the following steps:
(1) 60-80 parts of 2-functionality D400 series amino-terminated polyether is added into the reaction kettle.
(2) Starting a stirring system, and regulating the rotating speed to 400-600 rpm;
(3) At the rotating speed, 0.1-0.2 part of fatty acid polyglycol ester is added, the rotating speed is adjusted to 1000-1200 r/m, and the high-speed dispersion is carried out for 30-40 minutes; then sequentially adding 0.05-0.25 part of natural oil, 3-6 parts of phenyl o-hydroxybenzoate and 10-25 parts of aluminum tripolyphosphate; stirring for 30-50 min.
(4) Filtering with 100 mesh filter screen, filling nitrogen, sealing and packaging
Preparing a coating:
directly synthesizing a polyurea coating by adopting a one-step method by utilizing H20/35 host spraying equipment produced by the American polyurethane mechanical company in a normal temperature environment, wherein the material output ratio of the component A to the component B is 1.5, the pressure of a spray gun is 80kPa, and the spraying temperature is 65 ℃; and (3) spraying the material generated by the reaction on a PVC plastic plate coated with a release agent, wherein the thickness of the film is 2mm, and curing the sprayed coating at normal temperature for about one week.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Further, the dioctyl adipate in the preparation method of the component A is a plasticizer, and preferably 8-12 parts.
Further, the polytetrahydrofuran diol mentioned above in the preparation method of the component A is reacted with the added isophorone diisocyanate, and preferably 45-55 parts.
Further, the fatty acid polyglycol ester described above in the preparation method of the component B plays a dispersing role, and 0.15 part is preferable.
Further, the natural oil and fat in the preparation method of the component B plays a role in defoaming, and preferably 0.1 to 0.15 part.
Further, the phenyl o-hydroxybenzoate in the component B preparation method has an ultraviolet absorption effect.
Further, the aluminum tripolyphosphate used as the rust conversion and fixing active group in the component B preparation method is preferably 15 to 20 parts.
Compared with the prior art, the anti-corrosion coating for the wharf steel column at least has the following advantages:
1. the aluminum tripolyphosphate is used as the rust conversion and fixing active group for enhancing and modifying, so that the corrosion resistance of the coating is improved.
2. The paint does not contain a catalyst, is abnormally and quickly cured, can be operated with rust, and reduces the construction cost.
3. The solid content is high, no Volatile Organic Compound (VOC) is contained, and the environment is protected; the requirement on the construction environment is not high, and the construction is not influenced by the environmental temperature and humidity.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to the specific embodiments, features and effects of the anti-corrosive coating for steel columns of wharfs and the preparation method thereof according to the present invention in combination with the preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The following is a further description with reference to specific examples.
Example 1
The preparation method of the component A comprises the following steps:
(1) 50 parts of dioctyl adipate and 8 parts of dioctyl adipate are added into the reaction kettle.
(2) After the temperature of the reaction kettle is raised to 80 ℃, starting a vacuum system, and simultaneously introducing nitrogen from the bottom of the reaction kettle to remove moisture in the materials in the reaction kettle;
(3) After 0.4 hour, after the moisture content of the materials in the reaction kettle is detected to be less than 0.05%, the temperature is reduced to 50 ℃, 45 parts of isophorone diisocyanate are added, and the mixture is stirred;
(4) Heating to 80 ℃ for reaction for 5 hours;
(5) Cooling to below 60 deg.C, filtering, discharging and packaging.
The preparation method of the component B comprises the following steps:
(1) 70 parts of 2-functionality D400-series amine-terminated polyethers are added to the reaction vessel.
(2) Starting a stirring system, and regulating the rotating speed to 500 revolutions per minute;
(3) Adding 0.15 part of fatty acid polyglycol ester at the rotating speed, regulating the rotating speed to 1100 r/min, and dispersing at a high speed for 40 minutes; then sequentially adding 0.1 part of natural oil, 4 parts of phenyl o-hydroxybenzoate and 15 parts of aluminum tripolyphosphate; stirred for 40 minutes.
(4) Filtering with 100 mesh filter screen, filling nitrogen, sealing and packaging
Example 2
The preparation method of the component A comprises the following steps:
(1) 40 parts of polytetrahydrofuran diol and 10 parts of dioctyl adipate are added into the reaction kettle.
(2) After the temperature of the reaction kettle is raised to 80 ℃, starting a vacuum system, and simultaneously introducing nitrogen from the bottom of the reaction kettle to remove moisture of the materials in the reaction kettle;
(3) After 0.4 hour, after the moisture content of the materials in the reaction kettle is detected to be less than 0.05%, the temperature is reduced to 50 ℃, 50 parts of isophorone diisocyanate are added, and the mixture is stirred;
(4) Heating to 80 ℃ and reacting for 5 hours;
(5) Cooling to below 60 deg.C, filtering, discharging and packaging.
The preparation method of the component B comprises the following steps:
(1) 70 parts of 2-functionality D400-series amine-terminated polyethers are added to the reaction vessel.
(2) Starting a stirring system, and regulating the rotating speed to 500 revolutions per minute;
(3) At the rotating speed, 0.15 part of fatty acid polyglycol ester is added, the rotating speed is adjusted to 1100 r/min, and the high-speed dispersion is carried out for 40 minutes; then sequentially adding 0.15 part of natural oil, 5 parts of phenyl o-hydroxybenzoate and 20 parts of aluminum tripolyphosphate; stirred for 40 minutes.
(4) Filtering with 100 mesh filter screen, filling nitrogen, sealing and packaging
Example 3
The preparation method of the component A comprises the following steps:
(1) 60 parts of polytetrahydrofuran glycol and 12 parts of dioctyl adipate are added into the reaction kettle.
(2) After the temperature of the reaction kettle is raised to 80 ℃, starting a vacuum system, and simultaneously introducing nitrogen from the bottom of the reaction kettle to remove moisture in the materials in the reaction kettle;
(3) After 0.4 hour, after the moisture content of the materials in the reaction kettle is detected to be less than 0.05%, reducing the temperature to 50 ℃, adding 55 parts of isophorone diisocyanate, and stirring;
(4) Heating to 80 ℃ and reacting for 5 hours;
(5) Cooling to below 60 deg.C, filtering, discharging and packaging.
The preparation method of the component B comprises the following steps:
(1) 75 parts of 2-functional D400-series amine-terminated polyethers are added to the reaction vessel.
(2) Starting a stirring system, and regulating the rotating speed to 500 revolutions per minute;
(3) Adding 0.15 part of fatty acid polyglycol ester at the rotating speed, regulating the rotating speed to 1100 r/min, and dispersing at a high speed for 40 minutes; then sequentially adding 0.15 part of natural oil, 6 parts of phenyl o-hydroxybenzoate and 15 parts of aluminum tripolyphosphate; stirred for 40 minutes.
(4) Filtering with 100 mesh sieve, filling nitrogen, sealing and packaging
Example 4
The preparation method of the component A comprises the following steps:
(1) 50 parts of polytetrahydrofuran glycol and 5 parts of dioctyl adipate are added into the reaction kettle.
(2) After the temperature of the reaction kettle is raised to 80 ℃, starting a vacuum system, and simultaneously introducing nitrogen from the bottom of the reaction kettle to remove moisture in the materials in the reaction kettle;
(3) After 0.4 hour, after the moisture content of the materials in the reaction kettle is detected to be less than 0.05%, the temperature is reduced to 50 ℃, 35 parts of isophorone diisocyanate are added, and the mixture is stirred;
(4) Heating to 80 ℃ for reaction for 5 hours;
(5) Cooling to below 60 deg.C, filtering, discharging and packaging.
The preparation method of the component B comprises the following steps:
(1) 75 parts of 2-functionality D400-series amine-terminated polyethers are added to the reaction vessel.
(2) Starting a stirring system, and regulating the rotating speed to 500 revolutions per minute;
(3) Adding 0.1 part of fatty acid polyglycol ester at the rotating speed, regulating the rotating speed to 1100 r/min, and dispersing at a high speed for 40 minutes; then sequentially adding 0.05 part of natural oil, 5 parts of phenyl o-hydroxybenzoate and 10 parts of aluminum tripolyphosphate; stirred for 40 minutes.
(4) Filtering with 100 mesh filter screen, filling nitrogen, sealing and packaging
Example 4
The preparation method of the component A comprises the following steps:
(1) 60 parts of polytetrahydrofuran glycol and 15 parts of dioctyl adipate are added into the reaction kettle.
(2) After the temperature of the reaction kettle is raised to 80 ℃, starting a vacuum system, and simultaneously introducing nitrogen from the bottom of the reaction kettle to remove moisture of the materials in the reaction kettle;
(3) After 0.4 hour, after the moisture content of the materials in the reaction kettle is detected to be less than 0.05%, the temperature is reduced to 50 ℃, 60 parts of isophorone diisocyanate are added, and the mixture is stirred;
(4) Heating to 80 ℃ for reaction for 5 hours;
(5) Cooling to below 60 deg.C, filtering, discharging and packaging.
The preparation method of the component B comprises the following steps:
(1) 75 parts of 2-functional D400-series amine-terminated polyethers are added to the reaction vessel.
(2) Starting a stirring system, and regulating the rotating speed to 500 revolutions per minute;
(3) At the rotating speed, 0.2 part of fatty acid polyglycol ester is added, the rotating speed is adjusted to 1100 r/min, and the high-speed dispersion is carried out for 40 minutes; then sequentially adding 0.25 part of natural oil, 5 parts of phenyl o-hydroxybenzoate and 25 parts of aluminum tripolyphosphate; stirred for 40 minutes.
(4) Filtering with 100 mesh sieve, filling nitrogen, sealing and packaging
Spraying and performance testing are carried out on the embodiment examples 1-5, and the specific spraying steps are as follows: directly synthesizing a polyurea coating by adopting a one-step method by utilizing H20/35 host spraying equipment produced by the manufacturing company of American polyurethane Cool mechanical company under the normal temperature environment, wherein the material output ratio of the component A to the component B is 1.5; the material generated by the reaction is sprayed on a PVC plastic plate coated with a release agent, and the thickness of the coating film is 2mm.
Table 1: the basic performance indexes of the spray coating are shown in Table 1
From the test performance results in table 1, it can be seen that the anti-corrosion coating for wharf steel columns based on the invention has solid content, gel time, bonding strength and NaCl corrosion resistance all higher than the national standard.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
The recitation of numerical ranges herein includes all numbers subsumed within that range and includes any two numbers subsumed within that range. Different values of the same index appearing in all embodiments of the invention can be combined arbitrarily to form a range value.
Features of the invention claimed and/or described in the specification may be combined and are not limited to the combinations specified in the claims. The technical solutions obtained by combining the technical features in the claims and/or the specification also belong to the scope of the present invention.
Claims (8)
1. The wharf steel column anti-corrosion coating is characterized in that raw materials of the anti-corrosion coating comprise a component A and a component B; the material output ratio of the component A to the component B is 1.5;
the component A comprises the following raw materials in parts by weight: 40-60 parts of polytetrahydrofuran diol, 5-15 parts of dioctyl adipate and 35-60 parts of isophorone diisocyanate;
the component B comprises the following raw materials in parts by weight: 60-80 parts of 2-functionality D400 series amino-terminated polyether, 0.1-0.2 part of fatty acid polyglycol ester, 0.05-0.25 part of natural oil, 3-6 parts of phenyl o-hydroxybenzoate and 10-25 parts of aluminum tripolyphosphate.
2. The wharf steel column anti-corrosion coating layer according to claim 1, wherein dioctyl adipate in the component a is a plasticizer, preferably 8-12 parts.
3. The wharf steel column anticorrosion coating layer of claim 1, wherein the polytetrahydrofuran glycol in the component a is 45-55 parts.
4. The corrosion-resistant coating for the pier steel column of claim 1, wherein the component B comprises 0.15 parts of fatty acid polyglycol ester.
5. The pier steel column anticorrosion coating of claim 1, wherein the natural oil in the component B is 0.1-0.15 parts.
6. The wharf steel column anti-corrosion coating layer according to claim 1, wherein the amount of the aluminum tripolyphosphate in the component B is 45-50 parts.
7. The pier steel column anticorrosion coating of claim 1, wherein component B is one of the components.
8. The preparation method of the anti-corrosion coating for the steel column of the wharf comprises the following steps:
the preparation method of the component A comprises the following steps:
(1) Adding 40-60 parts of polytetrahydrofuran diol and 5-15 parts of dioctyl adipate into a reaction kettle.
(2) After the temperature of the reaction kettle is raised to 60-90 ℃, starting a vacuum system, and simultaneously filling nitrogen from the bottom of the reaction kettle to remove moisture of materials in the reaction kettle;
(3) After 0.4 to 1 hour, after the moisture content of the materials in the reaction kettle is detected to be less than 0.05 percent, the temperature is reduced to 45 to 60 ℃, 35 to 60 parts of isophorone diisocyanate are added and stirred;
(4) Heating to 75-90 ℃ for reaction for 3-6 hours;
(5) Cooling to below 60 deg.C, filtering, discharging and packaging;
the preparation method of the component B comprises the following steps:
(1) 60-80 parts of 2-functionality D400 series amino-terminated polyether is added into the reaction kettle.
(2) Starting a stirring system, and regulating the rotating speed to 400-600 rpm; at the rotating speed, 0.1-0.2 part of fatty acid polyglycol ester is added, the rotating speed is adjusted to 1000-1200 r/m, and the high-speed dispersion is carried out for 30-40 minutes; then sequentially adding 0.05-0.25 part of natural oil, 3-6 parts of phenyl o-hydroxybenzoate and 10-25 parts of aluminum tripolyphosphate; stirring for 30-50 min.
(3) Filtering with 100 mesh filter screen, charging nitrogen, sealing and packaging;
preparing a coating:
directly synthesizing the polyurea coating by using spraying equipment by adopting a one-step method, wherein the output ratio of the A component to the B component is 1.5, the pressure of a spray gun is 80kPa, and the spraying temperature is 65 ℃; and (3) spraying the material generated by the reaction on a PVC plastic plate coated with a release agent, wherein the thickness of the film is 2mm, and curing the sprayed coating at normal temperature for about one week.
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| CN202211083693.6A CN115466562A (en) | 2022-09-06 | 2022-09-06 | Wharf steel column anti-corrosion coating and preparation method thereof |
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