CN115851123A - Light protective coating for corrosion resistance protection of inhaul cable and preparation method thereof - Google Patents
Light protective coating for corrosion resistance protection of inhaul cable and preparation method thereof Download PDFInfo
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- CN115851123A CN115851123A CN202211682146.XA CN202211682146A CN115851123A CN 115851123 A CN115851123 A CN 115851123A CN 202211682146 A CN202211682146 A CN 202211682146A CN 115851123 A CN115851123 A CN 115851123A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 30
- 238000005260 corrosion Methods 0.000 title claims abstract description 30
- 239000011253 protective coating Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000011521 glass Substances 0.000 claims abstract description 27
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910000077 silane Inorganic materials 0.000 claims abstract description 26
- 239000002904 solvent Substances 0.000 claims abstract description 26
- -1 polydimethylsiloxane Polymers 0.000 claims abstract description 24
- 239000000945 filler Substances 0.000 claims abstract description 22
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003063 flame retardant Substances 0.000 claims abstract description 20
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 19
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 19
- 239000011324 bead Substances 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000006229 carbon black Substances 0.000 claims abstract description 16
- 239000000049 pigment Substances 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims abstract description 14
- 239000007822 coupling agent Substances 0.000 claims abstract description 14
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical group BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000004005 microsphere Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 230000014759 maintenance of location Effects 0.000 claims description 6
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 5
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052794 bromium Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 5
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 2
- 239000011496 polyurethane foam Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 16
- 238000000576 coating method Methods 0.000 abstract description 16
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 241000872198 Serjania polyphylla Species 0.000 abstract description 3
- 238000000227 grinding Methods 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract description 2
- 238000004513 sizing Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 18
- 239000003921 oil Substances 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 210000002435 tendon Anatomy 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The invention provides a light protective coating for inhaul cable corrosion resistance protection, which comprises the following raw materials in parts by weight: 80-120 parts of polydimethylsiloxane; 10-20 parts of nano reinforced white carbon black; 10-20 parts of a flame retardant; 10-20 parts of light filler; 1-10 parts of pigment; 6-10 parts of a cross-linking agent; 1-5 parts of a coupling agent; 1-5 parts of a catalyst; 1-10 parts of solvent, and also provides a method for manufacturing the light protective coating; the coating base adhesive has moderate viscosity, good packing coating property, moderate softness and good adhesive force effect on a base material; the nano reinforcing white carbon black with high specific surface area is selected, the granularity is small, the specific surface area is large, and the mechanical property of the basic sizing material is improved by a mixing and grinding process; the silane modified nano hollow glass beads of the light filler are selected, the compatibility of the material is good, the internal coating is not damaged even if the material is rubbed and damaged, and the super-long weather-resistant effect is achieved; the light weight of the silane modified nano hollow glass beads is utilized to reduce the whole weight of the material, and the load on the guy cable can be greatly reduced.
Description
Technical Field
The invention relates to a light protective coating for inhaul cable corrosion resistance protection and a preparation method thereof.
Background
The guy cable, especially the bridge guy cable, is the most important load-bearing component for supporting bridges (including sling arch bridges, cable-stayed bridges, suspension bridges, etc.), is the life line of the bridge, and the durability and reliability of the guy cable are directly related to the safe operation and the service life of the bridge; the corrosion of the stay cable has an extremely important influence on the life and safety of the stay cable. The bridge cable generally works in a high stress state, so the stress corrosion characteristic is obvious. Research shows that the corrosion speed of the prestressed tendon is closely related to the working stress of the prestressed tendon, and the higher the working stress is, the faster the corrosion speed is. When the prestressed tendon is subjected to stress corrosion, the mechanical property of the prestressed tendon is obviously reduced, and fatigue brittle failure is easily generated. Therefore, the service life of the bridge guy cable is greatly shortened.
At present, the inhaul cable is protected by adopting a coating containing organic silicon, the organic silicon has high thermal stability, and the chemical bond of the molecule is not broken or decomposed at high temperature (or radiation irradiation); the organosilicon can resist high temperature and low temperature, and can be used in a wide temperature range. The change with temperature is small whether the chemical property or the physical and mechanical property is changed. The main chain of the organic silicon product is-Si-O-, and no double bonds exist, so that the organic silicon product is not easily decomposed by ultraviolet light and ozone. The organic silicon has better thermal stability, irradiation resistance and weather resistance than other high polymer materials; however, the current coating for the guy cable has the following problems: 1. the adhesive force to the substrate is poor, and the coating can be only thinly coated; 2. the mechanical properties of the base rubber are poor; 3. the coating has poor compatibility, and the inner coating is easy to damage by friction, impact and the like in the using process, so that the function of protecting the inhaul cable by the coating is ineffective; 4. the coating has large mass and causes great burden to the stay cable.
Disclosure of Invention
The invention aims to overcome the defects and provides a light protective coating for protecting the corrosion resistance of a guy cable and a preparation method thereof.
The invention adopts the following technical scheme:
a light protective coating for corrosion resistance protection of a guy cable comprises the following raw materials in parts by weight: 80-120 parts of polydimethylsiloxane; 10-20 parts of nano reinforced white carbon black; 10-20 parts of a flame retardant; 10-20 parts of light filler; 1-10 parts of pigment; 6-10 parts of a cross-linking agent; 1-5 parts of a coupling agent; 1-5 parts of a catalyst; 1-10 parts of a solvent.
Preferably, the viscosity of the polydimethylsiloxane is 5000-50000cp.
Preferably, the flame retardant is decabromodiphenylethane; the particle size of the decabromodiphenylethane is 1-5 mu m; the bromine content of the decabromodiphenylethane is greater than 81%.
Preferably, the light filler is silane modified nano hollow glass beads; the silane modified nano hollow glass bead has the true density of 0.15-0.20g/cm 3 (ii) a The particle size of the silane modified nano hollow glass bead is 1-10 mu m; the vacuum retention rate of the silane modified nano hollow glass bead is more than 80%.
Preferably, the solvent is one or more of trichloroethylene, tetrachloroethylene and solvent naphtha.
A preparation method of a light protective coating for corrosion resistance protection of a guy cable comprises the following steps:
the method comprises the following steps: preparing the following raw materials in parts by weight: 80-120 parts of polydimethylsiloxane; 10-20 parts of nano reinforced white carbon black; 10-20 parts of a flame retardant; 10-20 parts of light filler; 1-10 parts of pigment; 6-10 parts of a cross-linking agent; 1-5 parts of a coupling agent; 1-5 parts of a catalyst; 1-10 parts of a solvent.
Step two: and adding the polydimethylsiloxane and the nano reinforcing white carbon black into a planetary stirrer, starting oil bath heating, and starting strong stirring for 30min.
Step three, after the raw materials in the step two are uniformly stirred, sequentially adding the flame retardant, the light filler and the pigment into a planetary stirrer, heating the materials to 120 ℃, starting to fill a small amount of nitrogen, vacuumizing to-0.8 MPa, keeping for 2 hours, then closing heating and continuously cooling until the temperature of the materials is reduced to below 40 ℃; wherein the weight parts of the flame retardant are 10-20 parts, the light filler is 10-20 parts, and the pigment is 1-10 parts.
Step four: and after the steps are finished, adding the cross-linking agent, the coupling agent, the catalyst and the solvent, starting strong dispersion, and mixing for 20-30min under the protection of nitrogen to obtain the polyurethane foam material.
A preparation method of a light protective coating for inhaul cable corrosion resistance protection is disclosed, preferably, the viscosity of the polydimethylsiloxane is 5000-50000cp; the flame retardant is decabromodiphenylethane; the particle size of the decabromodiphenylethane is 1-5 mu m; the bromine content of the decabromodiphenylethane is greater than 81%; the light filler is silane modified nano hollow glass microspheres; the silane modified nano hollow glass bead has a true density of 0.15-0.20g/cm 3 (ii) a The particle size of the silane modified nano hollow glass bead is 1-10 mu m; the vacuum retention rate of the silane modified nano hollow glass microspheres is more than 80 percent; the solvent is formed by mixing one or more than two of trichloroethylene, tetrachloroethylene and solvent oil.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, the base adhesive has moderate viscosity, good packing coating property, moderate softness and good adhesive force effect on the base material.
2. According to the invention, the nano reinforced white carbon black with high specific surface area is selected, the granularity is small, the specific surface area is large, and the mechanical property of the basic rubber material is improved by a mixing and grinding process.
3. In the invention, the light filler is selected to have the true density of 0.15-0.20g/cm 3 The silane modified nano hollow glass microsphere with the grain diameter of 1-10 mu m and the vacuum retention rate of more than 80 percent has good material compatibility, can not damage the internal coating even after being rubbed and damaged, and has overlong weather-proof effect.
4. According to the invention, the light weight of the silane modified nano hollow glass microspheres is utilized to reduce the overall weight of the material, so that the load on the guy cable can be greatly reduced.
Detailed Description
In order to make the purpose and technical solution of the present invention clearer, the present invention is further described with reference to the following examples:
example 1:
a light protective coating for corrosion resistance protection of a guy cable comprises the following materials, by weight, 100 parts of polydimethylsiloxane, 14 parts of nano reinforcing white carbon black, 20 parts of a flame retardant, 6 parts of a light filler, 2 parts of a pigment, 6 parts of a cross-linking agent, 1 part of a coupling agent, 1 part of a catalyst and 5 parts of a solvent.
A manufacturing method of a light protective coating for protecting corrosion resistance of a guy cable comprises the following steps:
the method comprises the following steps: the above raw materials were prepared in parts.
Step two: adding polydimethylsiloxane and nano reinforcing white carbon black into a planetary stirrer, starting oil bath heating, starting strong stirring, and stirring for 30min.
Step three, after the mixture obtained in the step one is uniformly stirred, the flame retardant, the light filler and the pigment are sequentially added into a planetary stirrer until the temperature of the mixture rises to 120 ℃, a small amount of nitrogen is filled, the mixture is vacuumized to-0.8 MPa, the mixture is kept for 2 hours, and then the mixture is closed to heat and continue to cool until the temperature of the mixture drops to 40 ℃.
Step four: and cooling the materials in the step two, calculating the amount of the solvent, the cross-linking agent, the coupling agent, the catalyst and the solvent, starting strong dispersion, and mixing for 20-30min under the protection of nitrogen.
Step five: and (4) subpackaging the materials uniformly dispersed in the step three to obtain the automatically-coated corrosion-resistant light material for the stay cable.
Example 2:
the inhaul cable corrosion-resistant light material capable of being automatically coated comprises the following materials in parts by weight: 100 parts of polydimethylsiloxane, 16 parts of nano reinforcing white carbon black, 15 parts of flame retardant, 7 parts of light filler, 2 parts of pigment, 6 parts of cross-linking agent, 1 part of coupling agent, 1 part of catalyst and 5 parts of solvent.
A manufacturing method of a light protective coating for protecting corrosion resistance of a guy cable comprises the following steps:
the method comprises the following steps: the above raw materials were prepared in parts.
Step two: adding polydimethylsiloxane and nano reinforcing white carbon black into a planetary stirrer, starting oil bath for heating, starting strong stirring, and stirring for 30min.
Step three, after the mixture obtained in the step one is uniformly stirred, the flame retardant, the light filler and the pigment are sequentially added into a planetary stirrer until the temperature of the mixture rises to 120 ℃, a small amount of nitrogen is filled, the mixture is vacuumized to-0.8 MPa, the mixture is kept for 2 hours, and then the mixture is closed to heat and continue to cool until the temperature of the mixture drops to 40 ℃.
Step four: and cooling the materials in the step two, calculating the amount of the solvent, the cross-linking agent, the coupling agent, the catalyst and the solvent, starting strong dispersion, and mixing for 20-30min under the protection of nitrogen.
Step five: and (4) subpackaging the materials uniformly dispersed in the step three to obtain the automatically-coated corrosion-resistant light material for the stay cable.
Example 3:
an automatic coating corrosion-resistant light material for a inhaul cable comprises the following materials in parts by weight: 100 parts of polydimethylsiloxane, 16 parts of nano reinforcing white carbon black, 10 parts of light filler, 20 parts of flame retardant, 2 parts of pigment, 6 parts of cross-linking agent, 1 part of coupling agent, 1 part of catalyst and 5 parts of solvent.
A manufacturing method of a light protective coating for inhaul cable corrosion resistance protection comprises the following steps:
the method comprises the following steps: the above raw materials were prepared in parts.
Step two: adding polydimethylsiloxane and nano reinforcing white carbon black into a planetary stirrer, starting oil bath for heating, starting strong stirring, and stirring for 30min.
Step three, after the mixture obtained in the step one is uniformly stirred, the flame retardant, the light filler and the pigment are sequentially added into a planetary stirrer until the temperature of the mixture rises to 120 ℃, a small amount of nitrogen is filled, the mixture is vacuumized to-0.8 MPa, the mixture is kept for 2 hours, and then the mixture is closed to heat and continue to cool until the temperature of the mixture drops to 40 ℃.
Step four: and cooling the materials in the step two, calculating the amount of the solvent, the cross-linking agent, the coupling agent, the catalyst and the solvent, starting strong dispersion, and mixing for 20-30min under the protection of nitrogen.
Step five: and (4) subpackaging the materials uniformly dispersed in the step three to obtain the automatically-coated corrosion-resistant light material for the stay cable.
In the three embodiments described above: the viscosity of the polydimethylsiloxane is 5000-50000cp; the flame retardant is decabromodiphenylethane; the particle size of the decabromodiphenylethane is 1-5 mu m; the bromine content of the decabromodiphenylethane is greater than 81%; the light filler is silane modified nano hollow glass microspheres; the silane modified nano hollow glass bead has the true density of 0.15-0.20g/cm 3 (ii) a The particle size of the silane modified nano hollow glass bead is 1-10 mu m; the vacuum retention rate of the silane modified nano hollow glass bead is more than 80 percent; the solvent is formed by mixing one or more than two of trichloroethylene, tetrachloroethylene and solvent oil; the cross-linking agent, the coupling agent and the catalyst are conventional products used for preparing the coating.
The principle of the invention is as follows:
according to the invention, the long-chain soft hydroxyl-terminated polydimethylsiloxane is used as the base resin, the mechanical property of the material is improved by adding the nano reinforcing white carbon black with high specific surface area, so that the hollow glass microspheres and the coating are fully mixed, the compatibility of the material is good, the internal coating cannot be damaged even if the material is rubbed and damaged, and the super-long weather-proof effect is achieved; only a small amount of silane modified nano hollow glass beads need to be added in the later period, the overall weight of the material is reduced by utilizing the light weight of the silane modified nano hollow glass beads, and the load of the guy cable can be greatly reduced.
The technical parameters of the light protective coating for protecting the corrosion resistance of the inhaul cable and the performance test after curing are shown in the table 1.
TABLE 1 Performance test results table (curing conditions 23 ℃, 50% humidity)
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The components used in the present invention are all common standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimental methods.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.
Claims (7)
1. A light protective coating for corrosion resistance protection of a guy cable is characterized by comprising the following raw materials in parts by weight:
80-120 parts of polydimethylsiloxane;
10-20 parts of nano reinforced white carbon black;
10-20 parts of a flame retardant;
10-20 parts of light filler;
1-10 parts of pigment;
6-10 parts of a cross-linking agent;
1-5 parts of a coupling agent;
1-5 parts of a catalyst;
1-10 parts of a solvent.
2. A light protective coating for corrosion resistance protection of inhaul cables according to claim 1, characterized in that:
the viscosity of the polydimethylsiloxane is 5000-50000cp.
3. A light protective coating for corrosion resistance protection of inhaul cables according to claim 1, characterized in that:
the flame retardant is decabromodiphenylethane;
the particle size of the decabromodiphenylethane is 1-5 mu m;
the bromine content of the decabromodiphenylethane is greater than 81%.
4. A light protective coating for corrosion resistance protection of inhaul cables according to claim 1, characterized in that:
the light filler is silane modified nano hollow glass microspheres;
the silane modified nano hollow glass bead has the true density of 0.15-0.20g/cm 3 ；
The particle size of the silane modified nano hollow glass bead is 1-10 mu m;
the vacuum retention rate of the silane modified nano hollow glass bead is more than 80%.
5. A light protective coating for corrosion resistance protection of inhaul cables according to claim 1, characterized in that:
the solvent is formed by mixing one or more than two of trichloroethylene, tetrachloroethylene and solvent naphtha.
6. A preparation method of a light protective coating for inhaul cable corrosion resistance protection is characterized by comprising the following steps:
the method comprises the following steps: preparing the following raw materials in parts by weight: 80-120 parts of polydimethylsiloxane; 10-20 parts of nano reinforced white carbon black; 10-20 parts of a flame retardant; 10-20 parts of light filler; 1-10 parts of pigment; 6-10 parts of a cross-linking agent; 1-5 parts of a coupling agent; 1-5 parts of a catalyst; 1-10 parts of a solvent;
step two: adding the polydimethylsiloxane and the nano reinforcing white carbon black into a planetary stirrer, starting oil bath heating, and starting strong stirring for 30min;
step three, after the raw materials in the step two are uniformly stirred, sequentially adding the flame retardant, the light filler and the pigment into a planetary stirrer, heating the materials to 120 ℃, starting to fill a small amount of nitrogen, vacuumizing to-0.8 MPa, keeping for 2 hours, then closing heating and continuously cooling until the temperature of the materials is reduced to below 40 ℃; wherein the weight parts of the flame retardant are 10-20 parts, the weight parts of the light filler are 10-20 parts, and the weight parts of the pigment are 1-10 parts;
step four: and after the steps are finished, adding the cross-linking agent, the coupling agent, the catalyst and the solvent, starting strong dispersion, and mixing for 20-30min under the protection of nitrogen to obtain the polyurethane foam material.
7. The preparation method of the light protective coating for the corrosion resistance protection of the inhaul cable according to the claim 6 is characterized in that:
the viscosity of the polydimethylsiloxane is 5000-50000cp;
the flame retardant is decabromodiphenylethane; the particle size of the decabromodiphenylethane is 1-5 mu m; the bromine content of the decabromodiphenylethane is greater than 81%;
the light filler is silane modified nano hollow glass microspheres; the silane modified nano hollow glass bead has the true density of 0.15-0.20g/cm 3 (ii) a The particle size of the silane modified nano hollow glass bead is 1-10 mu m; the vacuum retention rate of the silane modified nano hollow glass microspheres is more than 80 percent;
the solvent is formed by mixing one or more than two of trichloroethylene, tetrachloroethylene and solvent oil.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL444295A1 (en) * | 2023-04-01 | 2024-10-07 | C-Coat Insulation Poland Pty Ltd Spółka Z Ograniczoną Odpowiedzialnością | Fireproof, thermally insulating and anti-corrosion coating and method of producing a fireproof, thermally insulating and anti-corrosion coating |
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