CN110903462A - Ultraviolet-resistant and salt-fog-resistant organic silicon-fluorine modified epoxy resin and application method thereof - Google Patents
Ultraviolet-resistant and salt-fog-resistant organic silicon-fluorine modified epoxy resin and application method thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/06—Preparatory processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/24—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen halogen-containing groups
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to an ultraviolet-resistant and salt-fog-resistant organic silicon fluorine modified epoxy resin and an application method thereof, wherein the epoxy resin is applied to preparing an ultraviolet-resistant and corrosion-resistant organic silicon fluorine epoxy resin powder coating, and the coating comprises the following components in parts by weight: 50-70 parts of organic silicon fluorine modified epoxy resin, 20-30 parts of polybutylenediamine adipic acid amide powder, 10-15 parts of polytetrafluoroethylene powder, 10-15 parts of elastic polyurethane toughening powder, 2-3 parts of powder type organic silicon leveling agent and 20-30 parts of KH560 modified filler. The coating product of the invention has good acid corrosion resistance, salt spray resistance, ultraviolet resistance, bending strength and impact resistance while maintaining good adhesive force, high hardness and good water resistance of the traditional epoxy resin powder coating, and has wide application prospect.
Description
Technical Field
The invention relates to a divisional application of a Chinese patent 'an ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating', wherein the application date is 2018, 5 and 2 days, and the application number is 201810409368.1. The invention relates to an ultraviolet-resistant and salt-fog-resistant organic silicon fluorine modified epoxy resin, in particular to a special component for preparing an ultraviolet-resistant and corrosion-resistant organic silicon fluorine epoxy resin powder coating, belonging to the technical field of heavy-duty anticorrosive coatings.
Background
The metal material is damaged by the action of the surrounding medium, which is called metal corrosion. Corrosion of metals is the most common form of corrosion. During corrosion, a chemical or electrochemical multiphase reaction occurs at the interface of the metal, causing the metal to change to an oxidized (ionic) state. This can significantly reduce the mechanical properties of the metal material such as strength, plasticity, toughness, etc., destroy the geometry of the metal member, increase the wear between parts, deteriorate the physical properties of electricity, optics, etc., and shorten the service life of the device. The corrosion phenomena of metals are very common, with the most common being corrosion of the most used metal-ferrous products. The corrosion factors that cause metal materials are many, including salinity, temperature, pH, and microbial corrosion in air or liquids. The conventional anticorrosion measure is to coat a layer of anticorrosion paint on the surface of the metal to isolate the metal from air, so as to achieve the anticorrosion effect.
Anticorrosive coatings are generally classified into conventional anticorrosive coatings and heavy anticorrosive coatings. The heavy-duty anticorrosive coating is an anticorrosive coating which can be applied in a relatively severe corrosive environment compared with a conventional anticorrosive coating and has a longer protection period than the conventional anticorrosive coating. In the field of heavy-duty anticorrosive coatings, epoxy resin powder coatings have poor ultraviolet resistance, are easy to yellow, deteriorate and fall off, and have poor durability of anticorrosive effect.
Chinese patent 201711103980.8 relates to an anticorrosive powder coating and a preparation method thereof, in particular to the technical field of thermosetting powder coatings, and the formula comprises the following components: novolac-modified epoxy resin a: 50% -60%, novolac modified epoxy resin B: 10 to 15 percent of phenolic hydroxyl resin, 15 to 18 percent of 2-methylimidazole, 1.2 to 1.5 percent of 2-methylimidazole, 1 percent of PV88 leveling agent, 0.5 percent of benzoin, 1 to 19.5 percent of precipitated barium sulfate, 3 percent of inorganic pigment and 0.2 percent of gas phase aluminum oxide. However, the phenolic aldehyde modified epoxy resin is poor in ultraviolet resistance and is not suitable for outdoor long-term use.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention aims to provide an ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating and a preparation method thereof.
The invention adopts the following technical scheme that an ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating comprises the following components in parts by weight: 50-70 parts of organic silicon fluorine modified epoxy resin, 20-30 parts of polybutylenediamine adipic acid amide powder, 10-15 parts of polytetrafluoroethylene powder, 10-15 parts of elastic polyurethane toughening powder, 2-3 parts of powder type organic silicon leveling agent and 20-30 parts of KH560 modified filler.
The ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating is characterized in that the preparation method of the organic silicon fluorine modified epoxy resin comprises the following steps:
(1) preparing an organic silicon epoxy reagent: 1 molar part of 1,1,3, 3-tetramethyl dihydrodisiloxane, 5X 10 in terms of metal platinum, is added to the reactor under the condition of introducing nitrogen-5-1×10-4Heating chloroplatinic acid in molar parts and toluene in 18-25 molar parts to 50-80 ℃, dropwise adding acrylic hydroxyalkyl ester monomer in 1-2 molar parts, and reacting for 2-4h after dropwise adding is finished for 0.5-1 h; slowly dropwise adding 1-2 molar parts of epoxy chloropropane into the mixture, keeping the temperature for reaction for 3-6h after the dropwise adding is finished for 0.5-1h, and removing the diluent through reduced pressure distillation to obtain an organic silicon epoxy reagent;
(2) synthesizing organic silicon fluorine modified epoxy resin: according to weight portion, 25-35 portions of organic silicon epoxy reagent, 15-25 portions of trifluoromethyl triethoxysilane, 5-10 portions of KH560, 5-10 portions of methyl orthosilicate, 5-10 portions of hexafluoro dimethyl diethoxy silane and 25-35 portions of xylene are heated to 65-80 ℃, then slowly dripping 1-2 parts of acid catalyst and 5-10 parts of deionized water into the reactor through different feed inlets respectively, finishing dripping for 2-3h, keeping the temperature for continuous reaction for 8-10 h, adding alkali into the reactor to adjust the pH to 9, heating the reactor to 85-100 ℃, carrying out reduced pressure distillation for polycondensation reaction for 3-5h, adding 1-2 parts of anhydrous calcium chloride, heating to 100-; washing the crude product with deionized water to neutrality, vacuum drying, and sieving to obtain the organosilicon fluorine modified epoxy resin.
The particle size of the organic silicon fluorine modified epoxy resin, the polybutylenediamine adipic acid amide powder, the polytetrafluoroethylene powder, the elastic polyurethane toughening powder, the powder type organic silicon leveling agent and the KH560 modified filler is 100-800 meshes.
The KH560 modified filler is at least one of KH560 modified titanium dioxide, KH560 modified silica micropowder, KH560 modified light calcium powder and KH560 modified barium sulfate.
The hydroxyalkyl acrylate monomer is at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate and hydroxypropyl methacrylate, and is selected from hydroxybutyl acrylate and hydroxybutyl methacrylate.
The acid catalyst is at least one of concentrated hydrochloric acid, sulfuric acid, p-toluenesulfonic acid, trifluoromethanesulfonic acid, trifluoroacetic acid and hydrobromic acid.
The alkali is at least one of sodium hydroxide and potassium hydroxide.
The preparation method of the ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating is characterized by comprising the following steps: fully and uniformly mixing the components of the coating in a mixing device according to the corresponding parts by weight; then melt-extruding through a screw extruder, and controlling the temperature of a charging section to be 60 ℃, the temperature of a melting section to be 85 ℃ and the temperature of a discharging section to be 110 ℃; and tabletting the molten material by a tabletting machine, controlling the thickness to be 2-3mm, crushing the molten material, feeding the crushed molten material into a grinding mill for crushing, and sieving the crushed molten material by a 200-mesh sieve to obtain the ultraviolet-resistant and corrosion-resistant organic silicon fluorine epoxy resin powder coating.
The use method of the ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating comprises the following steps: the coating is electrostatically sprayed on a derusted and deoiled metal base material by a corona spray gun and then baked for 30-60min at the temperature of 180-200 ℃.
Compared with the prior art, the invention has the following advantages: 1. the epoxy resin modified by organosilicon fluorine containing epoxy functionality is synthesized without adopting the conventional epoxy resin containing benzene ring and being not resistant to ultraviolet rays, and has the advantages of good hydrophobicity, good salt spray resistance and acid and alkali corrosion resistance; 2. the poly (tetramethylene diamine adipate) amide is used as a curing agent, so that the defect that formaldehyde is released by phenolic resin is overcome, and the hardness and the impact strength of the cured poly (tetramethylene diamine adipate) amide are higher; 3. the filler is modified by KH560, participates in the curing process of the organic silicon modified epoxy resin and the polybutylenediamine adipic acid amide, and is integrated with the organic silicon modified epoxy resin and the polybutylenediamine adipic acid amide to prevent the corrosion of acid, alkali and salt to the metal base material; 4. the polytetrafluoroethylene is also selected as a physical addition component to improve the corrosion resistance of the coating, and the elastic polyurethane is used to improve the toughness of the coating.
Detailed Description
The ultraviolet-resistant and corrosion-resistant organic silicon fluorine epoxy resin powder coating and the preparation method thereof are further described in the following with reference to the examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention.
Example 1
The preparation method of the organic silicon fluorine modified epoxy resin A comprises the following steps:
(1) preparing an organic silicon epoxy reagent: 1 molar part of 1,1,3, 3-tetramethyl dihydrodisiloxane, 7X 10 in terms of metal platinum, is added to the reactor under the condition of introducing nitrogen-5Heating chloroplatinic acid in molar parts and toluene in 22 molar parts to 65 ℃, dropwise adding hydroxyethyl methacrylate in 1.4 molar parts, and reacting for 2.5 hours after dropwise adding is finished for 0.7 hour; slowly dropwise adding 1.3 molar parts of epoxy chloropropane into the mixture, keeping the temperature for reaction for 5 hours after the dropwise adding is finished for 0.8 hour, and removing the diluent through reduced pressure distillation to obtain an organic silicon epoxy reagent;
(2) synthesizing organic silicon fluorine modified epoxy resin: heating 35 parts of organic silicon epoxy reagent, 25 parts of trifluoromethyl triethoxysilane, 5 parts of KH560, 10 parts of methyl orthosilicate, 5 parts of hexafluoro-dimethyl diethoxy silane and 35 parts of xylene to 65 ℃, then slowly dripping 2 parts of trifluoroacetic acid and 5 parts of deionized water into the mixture through different feed inlets respectively, finishing dripping 3 hours simultaneously, keeping the temperature for continuous reaction for 8 hours, adding potassium hydroxide into a reactor to adjust the pH to 9, then heating the reactor to 100 ℃, carrying out polycondensation reaction for 3 hours by reduced pressure distillation, adding 1 part by weight of anhydrous calcium chloride, heating to 110 ℃, and continuing reduced pressure distillation for polycondensation reaction for 3 hours to obtain an organic silicon epoxy resin crude product; washing the crude product with deionized water to neutrality, vacuum drying, and sieving to obtain the organosilicon fluorine modified epoxy resin A.
Example 2
The preparation method of the organic silicon-fluorine modified epoxy resin B comprises the following steps:
(1) preparing an organic silicon epoxy reagent: 1 molar part of 1,1,3, 3-tetramethyl dihydrodisiloxane, 1X 10 in terms of metal platinum, is added to the reactor under the condition of introducing nitrogen-4Heating chloroplatinic acid in molar parts and toluene in 18 molar parts to 50 ℃, dropwise adding 1 molar part of hydroxybutyl acrylate into the chloroplatinic acid in molar parts, and reacting for 4 hours after dropwise adding is finished for 0.5 hour; slowly dropwise adding 1 molar part of epoxy chloropropane into the mixture, keeping the temperature for reaction for 6 hours after the dropwise adding is finished for 0.5 hour, and removing the diluent through reduced pressure distillation to obtain an organic silicon epoxy reagent;
(2) synthesizing organic silicon fluorine modified epoxy resin: heating 25 parts by weight of an organic silicon epoxy reagent, 15 parts by weight of trifluoromethyl triethoxysilane, 10 parts by weight of KH560, 5 parts by weight of methyl orthosilicate, 10 parts by weight of hexafluoro-dimethyl diethoxy silane and 25 parts by weight of xylene to 80 ℃, then slowly dropwise adding 1 part by weight of hydrobromic acid and 10 parts by weight of deionized water into the mixture through different feed inlets respectively, finishing dropwise adding simultaneously for 2 hours, keeping the temperature for continuous reaction for 10 hours, adding sodium hydroxide into a reactor to adjust the pH to 9, then heating the reactor to 85 ℃, carrying out reduced pressure distillation for polycondensation reaction for 5 hours, adding 2 parts by weight of anhydrous calcium chloride, heating to 100 ℃, and continuing reduced pressure distillation for polycondensation reaction for 4 hours to obtain an organic silicon epoxy resin crude product; washing the crude product with deionized water to neutrality, vacuum drying, and sieving to obtain the organosilicon fluorine modified epoxy resin B.
Example 3
The preparation method of the organic silicon fluorine modified epoxy resin C comprises the following steps:
(1) preparing an organic silicon epoxy reagent: 1 molar part of 1,1,3, 3-tetramethyl dihydrodisiloxane, 5X 10 in terms of metal platinum, is added to the reactor under the condition of introducing nitrogen-5Heating to 80 ℃ after the mole parts of chloroplatinic acid and 25 mole parts of toluene, dropwise adding 2 mole parts of hydroxyethyl acrylate into the mixture, and carrying out heat preservation reaction for 2 hours after 1 hour of dropwise adding; slowly dropwise adding 2 molar parts of epichlorohydrin for 1 hour, keeping the temperature for reaction for 3 hours after dropwise adding, and removing the diluent through reduced pressure distillation to obtain an organic silicon epoxy reagent;
(2) synthesizing organic silicon fluorine modified epoxy resin: heating 28 parts by weight of organic silicon epoxy reagent, 20 parts by weight of trifluoromethyl triethoxysilane, 6 parts by weight of KH560, 8 parts by weight of methyl orthosilicate, 8 parts by weight of hexafluoro-dimethyl diethoxy silane and 30 parts by weight of xylene to 70 ℃, then slowly dropwise adding 1.2 parts by weight of p-toluenesulfonic acid and 7 parts by weight of deionized water into the mixture through different feed inlets respectively, finishing dropwise adding the mixture for 2.4 hours simultaneously, keeping the temperature for continuous reaction for 9 hours, adding sodium hydroxide into a reactor to adjust the pH to 9, then heating the reactor to 90 ℃, carrying out reduced pressure distillation for polycondensation reaction for 3.5 hours, adding 1.5 parts by weight of anhydrous calcium chloride, heating to 105 ℃, and continuing reduced pressure distillation for polycondensation reaction for 3.5 hours to obtain an organic silicon epoxy resin crude product; washing the crude product with deionized water to neutrality, vacuum drying, and sieving to obtain the organosilicon fluorine modified epoxy resin C.
Example 4
An ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating comprises the following components in parts by weight: the paint comprises, by weight, 58 parts of organic silicon fluorine modified epoxy resin A, 20 parts of polybutylenediamine adipic acid amide powder, 12 parts of polytetrafluoroethylene powder, 12 parts of elastic polyurethane toughening powder, 2.4 parts of a powder type organic silicon leveling agent and 22 parts of KH560 modified light calcium carbonate powder.
Example 5
An ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating comprises the following components in parts by weight: the coating comprises, by weight, 70 parts of organic silicon fluorine modified epoxy resin B, 26 parts of polybutylenediamine adipic acid amide powder, 15 parts of polytetrafluoroethylene powder, 15 parts of elastic polyurethane toughening powder, 3 parts of a powder type organic silicon leveling agent and 20 parts of KH560 modified silicon micropowder.
Example 6
An ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating comprises the following components in parts by weight: the paint comprises C50 parts of organic silicon fluorine modified epoxy resin, 30 parts of polybutylenediamine adipic acid amide powder, 10 parts of polytetrafluoroethylene powder, 10 parts of elastic polyurethane toughening powder, 2 parts of a powder type organic silicon leveling agent and 30 parts of KH560 modified titanium dioxide.
The preparation method of the anti-ultraviolet corrosion-resistant organic silicon fluorine epoxy resin powder coating in the embodiments 4-6 comprises the following steps:
the ultraviolet-resistant corrosion-resistant organic silicon fluorine epoxy resin powder coating is fully and uniformly mixed in mixing equipment according to the formula composition; then melt-extruding through a screw extruder, and controlling the temperature of a charging section to be 60 ℃, the temperature of a melting section to be 85 ℃ and the temperature of a discharging section to be 110 ℃; and tabletting the molten material by a tabletting machine, controlling the thickness to be 2-3mm, crushing the molten material, feeding the crushed molten material into a grinding mill for crushing, and sieving the crushed molten material by a 200-mesh sieve to obtain the ultraviolet-resistant and corrosion-resistant organic silicon fluorine epoxy resin powder coating.
And (3) performance testing: the ultraviolet and corrosion resistant silicone fluorine epoxy resin powder coatings prepared in the above examples 4-6 and the Nippon epoxy anticorrosive powder coating (white) (comparative example) were electrostatically sprayed on a rust-removing, oil-removing cold-rolled steel sheet having a thickness of 1.0mm by a corona spray gun under the same conditions, and then baked at 180 ℃ for 40min to have a coating thickness of 60 μm. + -. 5 μm, and the results of the test properties according to the relevant standards are shown in Table 1 below.
TABLE 1 EXAMPLES 4-6 ultraviolet and corrosion resistant Silicone fluorine epoxy resin powder coating Properties
As can be seen from Table 1, the ultraviolet-resistant and corrosion-resistant organosilicon fluorine epoxy resin powder coating has good acid corrosion resistance, salt mist resistance, ultraviolet resistance, bending strength and impact resistance while maintaining good adhesive force, high hardness and good water resistance of the traditional epoxy resin powder coating.
Claims (8)
1. The ultraviolet-resistant and salt-fog-resistant organic silicon-fluorine modified epoxy resin is characterized by comprising the following preparation methods:
(1) preparing an organic silicon epoxy reagent: 1 molar part of 1,1,3, 3-tetramethyl dihydrodisiloxane, 5X 10 in terms of metal platinum, is added to the reactor under the condition of introducing nitrogen-5-1×10-4Heating chloroplatinic acid in molar parts and toluene in 18-25 molar parts to 50-80 ℃, dropwise adding acrylic hydroxyalkyl ester monomer in 1-2 molar parts, and reacting for 2-4h after dropwise adding is finished for 0.5-1 h; slowly dropwise adding 1-2 molar parts of epoxy chloropropane into the mixture, keeping the temperature for reaction for 3-6h after the dropwise adding is finished for 0.5-1h, and removing the diluent through reduced pressure distillation to obtain an organic silicon epoxy reagent;
(2) synthesizing organic silicon fluorine modified epoxy resin: according to weight portion, 25-35 portions of organic silicon epoxy reagent, 15-25 portions of trifluoromethyl triethoxysilane, 5-10 portions of KH560, 5-10 portions of methyl orthosilicate, 5-10 portions of hexafluoro dimethyl diethoxy silane and 25-35 portions of xylene are heated to 65-80 ℃, then slowly dripping 1-2 parts of acid catalyst and 5-10 parts of deionized water into the reactor through different feed inlets respectively, finishing dripping for 2-3h, keeping the temperature for continuous reaction for 8-10 h, adding alkali into the reactor to adjust the pH to 9, heating the reactor to 85-100 ℃, carrying out reduced pressure distillation for polycondensation reaction for 3-5h, adding 1-2 parts of anhydrous calcium chloride, heating to 100-; washing the crude product with deionized water to neutrality, vacuum drying, and sieving to obtain the organosilicon fluorine modified epoxy resin.
2. The UV resistant and salt fog resistant organosilicon fluorine modified epoxy resin of claim 1, wherein the hydroxyalkyl acrylate monomer is at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, hydroxybutyl acrylate and hydroxybutyl methacrylate.
3. The ultraviolet-resistant and salt-fog-resistant organosilicone-fluorine-modified epoxy resin as claimed in claim 1, wherein the acid catalyst is at least one of concentrated hydrochloric acid, sulfuric acid, p-toluenesulfonic acid, trifluoromethanesulfonic acid, trifluoroacetic acid and hydrobromic acid.
4. The ultraviolet-resistant and salt-fog-resistant organosilicone-fluorine-modified epoxy resin as claimed in claim 1, wherein the alkali is at least one of sodium hydroxide and potassium hydroxide.
5. The method for using the ultraviolet-resistant and salt-fog-resistant organic silicon fluorine modified epoxy resin as claimed in any one of claims 1 to 4, which is used for preparing an ultraviolet-resistant and corrosion-resistant organic silicon fluorine epoxy resin powder coating, wherein the coating comprises the following components in parts by weight: 50-70 parts of organic silicon fluorine modified epoxy resin, 20-30 parts of polybutylenediamine adipic acid amide powder, 10-15 parts of polytetrafluoroethylene powder, 10-15 parts of elastic polyurethane toughening powder, 2-3 parts of powder type organic silicon leveling agent and 20-30 parts of KH560 modified filler.
6. The method for applying the ultraviolet-resistant and salt-fog-resistant organic silicon-fluorine modified epoxy resin as claimed in claim 5, wherein the particle sizes of the organic silicon modified epoxy resin, the polybutylenediamine adipic acid amide powder, the polytetrafluoroethylene powder, the elastic polyurethane toughening powder, the powder type organic silicon leveling agent and the KH560 modified filler are 100-800 meshes.
7. The application method of the ultraviolet-resistant and salt-fog-resistant organic silicon-fluorine modified epoxy resin as claimed in claim 5, wherein the KH560 modified filler is at least one of KH560 modified titanium dioxide, KH560 modified silica micropowder, KH560 modified light calcium powder and KH560 modified barium sulfate.
8. The method for applying the ultraviolet-resistant and salt-fog-resistant organic silicon-fluorine modified epoxy resin as claimed in claim 5, wherein the preparation method of the coating comprises the following steps: fully and uniformly mixing the components of the coating in a mixing device according to the corresponding parts by weight; then melt-extruding through a screw extruder, and controlling the temperature of a charging section to be 60 ℃, the temperature of a melting section to be 85 ℃ and the temperature of a discharging section to be 110 ℃; and tabletting the molten material by a tabletting machine, controlling the thickness to be 2-3mm, crushing the molten material, feeding the crushed molten material into a grinding mill for crushing, and sieving the crushed molten material by a 200-mesh sieve to obtain the ultraviolet-resistant and corrosion-resistant organic silicon fluorine epoxy resin powder coating.
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| CN109554058A (en) * | 2018-11-28 | 2019-04-02 | 韶关市合众化工有限公司 | A kind of fluorinated silicone modified double-component aqueous epoxide terrace paint of self-emulsifying |
| CN109553734A (en) * | 2018-11-28 | 2019-04-02 | 韶关市合众化工有限公司 | A kind of emulsifiable organic fluorinated silicone epoxy resin |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687269A (en) * | 2005-04-29 | 2005-10-26 | 大庆高新区纽曼化工科技有限公司 | Enhanced anticorrosive and cutting resisting powder coating for reinforcing steel bar |
| CN106280926B (en) * | 2016-08-30 | 2018-07-27 | 黄伟青 | A kind of powdery paints for shell cylinder inner-wall spraying |
| CN107189628A (en) * | 2017-06-21 | 2017-09-22 | 浙江绿能塑粉有限公司 | A kind of high rigidity grit powder coating and preparation method thereof |
| CN107722786A (en) * | 2017-10-20 | 2018-02-23 | 漳州市万诚粉体涂料有限公司 | A kind of cryogenic curing scrubbing resistance powdery paints and its preparation technology |
| CN107936764B (en) * | 2017-11-28 | 2019-09-13 | 安徽善孚新材料科技股份有限公司 | A kind of fluorine-silicon modified epoxy resin and preparation method thereof and a kind of powdery paints |
-
2018
- 2018-05-02 CN CN201810409368.1A patent/CN108546495B/en active Active
- 2018-05-02 CN CN201911229708.3A patent/CN110903462A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112961567A (en) * | 2021-02-04 | 2021-06-15 | 曾万祥 | Modified epoxy resin powder coating with high adhesive force and preparation method thereof |
| CN113736349A (en) * | 2021-09-14 | 2021-12-03 | 安徽华辉塑业科技股份有限公司 | Corrosion-resistant epoxy resin coating and preparation method thereof |
| CN113736349B (en) * | 2021-09-14 | 2022-05-17 | 安徽华辉塑业科技股份有限公司 | Corrosion-resistant epoxy resin coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
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| CN108546495B (en) | 2020-01-10 |
| CN108546495A (en) | 2018-09-18 |
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