CN114452922B - Preparation device, method and application of high-solid low-VOC alkyd coating - Google Patents
Preparation device, method and application of high-solid low-VOC alkyd coating Download PDFInfo
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- CN114452922B CN114452922B CN202210047530.6A CN202210047530A CN114452922B CN 114452922 B CN114452922 B CN 114452922B CN 202210047530 A CN202210047530 A CN 202210047530A CN 114452922 B CN114452922 B CN 114452922B
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- 229920000180 alkyd Polymers 0.000 title claims abstract description 59
- 239000007787 solid Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000000576 coating method Methods 0.000 title abstract description 35
- 239000011248 coating agent Substances 0.000 title abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 123
- 239000000463 material Substances 0.000 claims abstract description 65
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 238000012546 transfer Methods 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000005886 esterification reaction Methods 0.000 claims abstract description 12
- 239000011253 protective coating Substances 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 89
- 239000002904 solvent Substances 0.000 claims description 35
- 239000003973 paint Substances 0.000 claims description 31
- 238000010992 reflux Methods 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000003085 diluting agent Substances 0.000 claims description 14
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 10
- 230000003028 elevating effect Effects 0.000 claims description 9
- 239000011344 liquid material Substances 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims description 6
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims description 6
- 230000001965 increasing effect Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 230000032050 esterification Effects 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 150000004665 fatty acids Chemical class 0.000 claims description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 5
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims description 5
- JTXMVXSTHSMVQF-UHFFFAOYSA-N 2-acetyloxyethyl acetate Chemical group CC(=O)OCCOC(C)=O JTXMVXSTHSMVQF-UHFFFAOYSA-N 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001802 infusion Methods 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- RMOUBSOVHSONPZ-UHFFFAOYSA-N Isopropyl formate Chemical compound CC(C)OC=O RMOUBSOVHSONPZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 229910052751 metal Chemical class 0.000 claims description 3
- 239000002184 metal Chemical class 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 5
- 238000007872 degassing Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000011345 viscous material Substances 0.000 description 5
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 235000019198 oils Nutrition 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- -1 calcium metal oxide Chemical class 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- TZIHFWKZFHZASV-UHFFFAOYSA-N anhydrous methyl formate Natural products COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
-
- 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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/46—Polyesters chemically modified by esterification
- C08G63/48—Polyesters chemically modified by esterification by unsaturated higher fatty oils or their acids; by resin acids
-
- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Polyesters Or Polycarbonates (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a preparation device and a preparation method of high-solid low-VOC alkyd protective coating and application of the coating, and relates to the technical field of coating preparation. The device forms spiral propulsion heating liquid flow through the rotation of directional transfer subassembly with the material in the reation kettle from outside to continuous stirring, and rethread returns the liquid subassembly and carries out the material circulation, effectively reduces the introduction of bubble in the material, and the heat conduction is rapid in the material, is favorable to reducing consuming time in the repeated intensification and the cooling process of material, improves raw materials esterification reaction's homogeneity. The high-solid alkyd resin prepared by the invention has the advantages of lower air content, uniform esterification reaction in a system, narrow molecular weight distribution of the product, moderate viscosity, no degassing and capability of being directly used for mixing production of the coating, and the prepared coating has good coating performance and wide protection application.
Description
Technical Field
The invention relates to the technical field of paint preparation, in particular to a preparation device, a preparation method and application of a high-solid low-VOC alkyd paint.
Background
The high solid paint belongs to one of the novel high-performance low-VOC paint, and the improvement of the solid content of the paint is not achieved by simply reducing the organic solvent, and relates to a series of novel raw materials and novel technologies such as low viscosity of film forming substances, application of active diluents, adoption of solvents with strong dissolving power, low toxicity and low cost, application of novel auxiliary agents and the like. The high-solid alkyd resin is a main raw material for preparing the high-solid low-VOC coating, and the emission of VOC in the coating is effectively reduced due to the advantages of higher solid content, low viscosity and the like, so the water-based and solvent-based high-solid alkyd resin is a main development direction of environment-friendly coatings in recent years.
At present, the conventional preparation method of the solvent-borne high-solid alkyd resin comprises the following steps: in a reaction kettle, stirring and heating natural soybean oil and glycerol, stopping stirring when the temperature reaches 120 ℃, and adding lithium hydroxide: continuously stirring and heating to 250-270 ℃, preserving heat for 40-60min, measuring the clear rate, cooling to below 200 ℃ after the clear rate reaches the standard, adding phthalic anhydride when the temperature is below 200 ℃, simultaneously putting a high flash point reflux solvent from a high-level tank, continuously heating to 160-180 ℃, starting reflux, increasing the temperature to 220-240 ℃ at the rate of 20 ℃ per hour, preserving heat for 50-65min, immediately cooling to 155-175 ℃ when the acid value is below 15mgKOH/g, and diluting with a high flash point odorless solvent to obtain the alkyd resin with high solid content. The specific preparation materials are different, but the reaction temperature adjustment in the preparation process is approximately similar.
The reaction kettle for preparing the existing resin is heated by adopting a jacket-wrapping mode, so that reaction raw materials in the reaction kettle are heated and transferred from an outer ring to the center, the heat conduction is slower due to poor heat conduction performance of the resin, the temperature of materials on the outer ring of the reaction kettle is obviously higher than the center temperature, stirring paddles or stirring blades are added in the reaction kettle in order to uniformly temperature the materials in the whole reaction kettle, and the temperature of the materials is rapidly balanced in a mechanical stirring mode, so that the temperature of the whole materials is uniform. However, the mechanical stirring mode can introduce a large amount of bubbles into the liquid material in the long-time heating reaction process, along with the progress of the esterification reaction, the viscosity of the liquid material can be gradually increased, the stirring can enable the viscous material to be filled with the bubbles, the bubbles can cause heat conduction to be more difficult, therefore, a higher stirring speed is required to balance the whole temperature of the material, the higher stirring speed can further cause the increase of the bubbles, in the repeated heating and cooling processes, excessive bubbles can not only cause more difficult heat absorption and heat dissipation of the material, the temperature change is slow, the time consumption is long, and the step of removing the bubbles is required to be added in the subsequent coating preparation process, so that the time and the labor are wasted. The above problems are more prominent in the industrial mass production process.
In addition, the reaction kettle with the outer jacket carries out heat input from the outer wall, materials close to the inner wall of the reaction kettle are heated faster, the temperature is higher, materials of the outer ring are esterified to form polymers with larger molecular weight, the polymers are more viscous due to the larger molecular weight and are easy to adhere to the inner wall of the reaction kettle, the existing stirring sheets or stirring blades hardly take away the polymers with larger viscosity through the flowing of liquid in the rotation process, a layer of resin polymer with larger viscosity is accumulated on the inner wall of the reaction kettle over time, the polymers further obstruct the conduction of heat to the inner ring of the reaction kettle, the accumulation of heat on the outer ring also further promotes the formation of macromolecular esterified matters, so that vicious circulation is formed, the reaction of the whole materials is uneven, the outer ring is over-reacted, the inner ring is heated insufficiently, the molecular weight distribution of products is wider, and the viscosity is larger. The adhesive layer increases the temperature difference of inner and outer ring materials in unit time, so that the esterification reaction is uneven. The existing reaction devices only pay attention to disordered stirring of materials, accomplish heat transfer through high-temperature and low-temperature material collision mixing, and do not pay attention to whether heat is orderly transferred along with the materials, and the defects are prominent when the reaction devices are used for producing viscous high-solid alkyd resin. Therefore, a device capable of orderly and unidirectionally transferring and circulating viscous materials at the outer ring and the center of a reaction kettle is needed, and heat carried by the viscous materials is conducted from outside to inside through orderly movement of the viscous materials, so that the problem of continuous thermal overreaction of outer-layer materials is solved.
Disclosure of Invention
The invention aims to provide a preparation device and method of high-solid low-VOC alkyd protective coating and application of the coating, and aims to solve the problems that esterification reaction is uneven in a reaction system, the molecular weight distribution of a product is wide, the viscosity is difficult to control, a degassing device is additionally required to be additionally arranged, and the like caused by the fact that bubbles are introduced through stirring in the preparation process of alkyd resin in the conventional reaction kettle.
In order to solve the problems, the invention provides the following technical scheme:
the preparation device of the alkyd resin with high solid content and low VOC comprises a frame, an annular heating component is arranged on the frame, a reaction kettle is sleeved in the annular heating component, a rotary lifting mechanism is arranged above the reaction kettle, a material directional transfer component is arranged below the rotary lifting mechanism, the upper part of the material directional transfer component is in sliding connection with the center of the top of the reaction kettle, the middle lower part of the material directional transfer component is arranged in the reaction kettle and is in sliding connection with the inner wall of the reaction kettle, a liquid outlet pipe is arranged at the center of the bottom of the reaction kettle, a three-way valve is arranged at the lower end of the liquid outlet pipe, one side of the three-way valve is communicated with a discharge pipe, the lower extreme intercommunication of three-way valve has the liquid subassembly that returns, the upper portion that returns the liquid subassembly communicates on reation kettle's lateral wall, rotatory elevating system is used for controlling the lift and the rotation of directional subassembly of dialling, when the bottom of directional subassembly of dialling descends with reation kettle bottom subsides, the bottom central authorities and the drain pipe upper end sealing intercommunication of directional subassembly of dialling, the material in the reation kettle is dialled to continuous stirring to reation kettle central authorities from outside to during the material is directional to dialling the subassembly rotation, return the liquid subassembly and pour into reation kettle again by reation kettle inner wall department after the material extraction of reation kettle central authorities.
Preferably, the directional transfer subassembly is including locating the pivot under the rotatory elevating system, pivot and reation kettle's top central sliding connection, coaxial be equipped with the drawing liquid pipe under the pivot, evenly be equipped with a plurality of imbibitions holes on the drawing liquid pipe, each be equipped with a set of cross support bar on pivot and the drawing liquid pipe, be equipped with the spiral plate between two sets of support bars, the spiral plate is the heliciform around outside the pivot, the outer end of spiral plate and reation kettle's inner wall sliding connection, when the spiral plate descends to the bottom surface and reation kettle inner bottom surface subsides, the lower extreme of drawing liquid pipe inserts in the drain pipe upper end and with the sealed rotation of drain pipe and be connected.
Preferably, the rotary lifting mechanism comprises a frame arranged on the frame, the top of the frame is rotationally connected with a cylinder, the cylinder is arranged above the reaction kettle, the top end of the rotating shaft is connected under a telescopic rod of the cylinder, a first gear is arranged outside the lower part of the cylinder, a motor is arranged below the top of the frame, a second gear is arranged on an output shaft of the motor, and the first gear is meshed with the second gear.
Preferably, the annular heating assembly comprises a heating jacket arranged on the frame, the heating jacket is coaxially sleeved outside the reaction kettle, and a plurality of heating rods are arranged between the reaction and the heating jacket.
Preferably, the liquid return assembly comprises an L-shaped liquid return pipe, the lower end of the liquid return pipe is communicated with the lower end of the three-way valve, the vertical part of the liquid return pipe is arranged on the inner wall of the reaction kettle, a plurality of liquid outlet holes are formed in the vertical part of the liquid return pipe, the liquid outlet holes are all opened on the inner wall of the reaction kettle, and an infusion pump is arranged on the transverse part of the liquid return pipe.
Preferably, the top of the reaction kettle is also provided with a feeding pipe, a reflux outlet and a reflux inlet, and the reflux outlet and the reflux inlet are both connected with a solvent reflux device.
The preparation method of the alkyd protective coating with high solid content and low VOC comprises the following steps:
(A) The preparation device of the alkyd resin is used for preparing the high-solid alkyd resin, and the specific method comprises the following steps: weighing the following raw materials in parts by weight: 20-24 parts of synthetic fatty acid, 2-4 parts of maleic anhydride, 8-12 parts of trimethylolpropane, 3 parts of dimethylbenzene, 18-25 parts of neopentyl glycol, 15 parts of diluent solvent and 20-28 parts of phthalic anhydride are put into an alkyd resin preparation device, nitrogen is introduced to heat up to 160-180 ℃, heat preservation is carried out for 1h when the solvent is refluxed, the temperature is increased to 200-220 ℃ at a rate of 20 ℃ per hour, heat preservation is carried out for 50-65min, cooling is carried out to 155-175 ℃ after the heat preservation esterification is qualified, and diluent solvent is added for diluent cooling, thus obtaining the alkyd resin with high solid content;
(B) Adding 40-50 parts by weight of high-solid alkyd resin and 40-50 parts by weight of diluent solvent into a dispersion cylinder, stirring and mixing, sequentially adding lead-free pigment and rust-proof pigment, and stirring and mixing uniformly;
(C) Sucking the dispersed slurry into a sand mill, and grinding at a rotating speed of 500-600 rpm until the fineness of the slurry is less than 30 mu m, wherein the slurry is in a stable state;
(D) Pumping the ground slurry into a paint mixing cylinder, simultaneously flushing the residual slurry adhered in the sand mill into the paint mixing cylinder by using 40-50 parts by weight of a let-down solvent, adding a lead-free drier and 40-50 parts by weight of high-solid alkyd resin, and uniformly stirring in the paint mixing cylinder to obtain the alkyd resin coating.
Preferably, the dilution solvent is ethylene glycol diacetate or methyl ethyl formate, and the lead-free drier is one or a mixture of a metal oxide or metal salt of cobalt, manganese, iron, zinc and calcium or a rare earth drier.
The high-solid low-VOC alkyd protective coating prepared by the invention is mainly applied to the protection of steel structures such as factory buildings, bridges, municipal administration, mechanical equipment and the like.
The invention has the advantages that:
according to the invention, the materials in the reaction kettle are continuously conveyed to the center of the reaction kettle from outside to inside through the rotation of the directional transfer component, the materials with the hotter outer ring are continuously conveyed to the center of the reaction kettle, the materials with the lower temperature are pumped away from the center of the reaction kettle, and the materials with the lower temperature are conveyed to the outer ring of the reaction kettle for heating by the liquid return component, so that a circulating heating liquid flow is formed, the aim of quickly balancing the overall temperature of the materials can be achieved without high-speed physical stirring, air bubbles are not introduced into the viscous materials, the heat conduction of the reaction materials is promoted to be quick, the time consumption is reduced in the repeated heating and cooling processes of the materials, and the adjustment sensitivity to the actual reaction temperature of the materials is improved. The spiral plate can be effectively lifted through the air cylinder, so that raw materials can be conveniently mixed and loaded and unloaded. The high-solid alkyd resin prepared by the invention has the advantages of lower air content, uniform esterification reaction in a system, narrow molecular weight distribution of the product, moderate viscosity, no need of degassing, and good coating performance of the prepared coating.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of an apparatus for producing an alkyd resin according to the present invention.
FIG. 2 is a schematic view showing the internal structure of an apparatus for producing an alkyd resin according to the present invention.
FIG. 3 is a side view of an alkyd resin preparation apparatus of the invention.
Fig. 4 is a cross-sectional view taken along the direction C-C in fig. 3.
FIG. 5 is a top view of an alkyd resin preparation apparatus of the invention.
Fig. 6 is a cross-sectional view taken along A-A in fig. 5.
Fig. 7 is a sectional view taken along the direction B-B in fig. 5.
The device comprises a 1-frame, a 11-heating jacket, a 111-heating rod, a 13-frame, a 2-cylinder, a 21-gear I, a 3-motor, a 31-gear II, a 4-reaction kettle, a 41-backflow outlet, a 42-backflow inlet, a 43-feeding pipe, a 44-liquid outlet pipe, a 5-rotating shaft, a 51-supporting strip, a 52-liquid suction pipe, a 521-liquid suction hole, a 6-spiral plate, a 7-three-way valve, a 71-discharging pipe, a 72-liquid return pipe, a 721-liquid outlet hole and a 73-liquid conveying pump.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Example 1: as shown in fig. 1 to 7, a preparation device for high-solid low-VOC alkyd resin comprises a frame 1, be equipped with annular heating component on the frame 1, annular heating component endotheca is equipped with reation kettle 4, reation kettle 4 top is equipped with rotatory elevating system, rotatory elevating system has material directional transfer subassembly down, material directional transfer subassembly upper portion and reation kettle 4 top central sliding connection, material directional transfer subassembly middle-lower part locate reation kettle 4 in and with reation kettle 4's inner wall sliding connection, reation kettle 4's bottom central authorities are equipped with drain pipe 44, the lower extreme of drain pipe 44 is equipped with three-way valve 7, one side intercommunication of three-way valve 7 has discharging pipe 71, three-way valve 7's lower extreme intercommunication has a liquid return subassembly, liquid return subassembly's upper portion is linked to reation kettle 4's lateral wall, rotatory elevating system is used for controlling directional transfer subassembly's lift and rotation, when the bottom of transferring the subassembly is down with reation kettle 4 bottom laminating, directional transfer subassembly's bottom central authorities and the inner wall sliding connection of drain pipe 44, material is transferred to the inside of reation kettle 4 from the inside to the inside of the inner wall of the reation kettle 4 is continuously filled with material from the lower end of directional transfer subassembly to the inside of reation kettle 4 to the inner wall, material is continuously filled with material 4 from the central authorities to the inside of reation kettle 4 to the inside of the reation kettle 4.
In this embodiment, the directional transfer component includes the pivot 5 of locating under the rotatory elevating system, pivot 5 and the top central sliding connection of reation kettle 4, coaxial being equipped with the liquid suction pipe 52 under the pivot 5, evenly be equipped with a plurality of imbibition holes 521 on the liquid suction pipe 52, each be equipped with a set of cross support bar 51 on pivot 5 and the liquid suction pipe 52, be equipped with screw plate 6 between two sets of support bars 51, screw plate 6 is the heliciform around outside pivot 5, the outer end of screw plate 6 and the inner wall sliding connection of reation kettle 4, when screw plate 6 descends to the bottom surface and the laminating of reation kettle 4 inner bottom surface, the lower extreme of liquid suction pipe 52 inserts in the drain pipe 44 upper end and with drain pipe 44 sealed rotation connection. The suction pipe 52 is used for sucking the central material uniformly from top to bottom, and if the central material is sucked from the bottom only, the upper material is not uniformly transferred, and the heat conduction is insufficient. If the liquid suction pipe 52 is arranged at the bottom of the reaction kettle, the drop or movement of the liquid level of the material is likely to lead air to enter the higher liquid suction pipe 52 to be led into the liquid material, and no air bubbles can be led in the discharging process and the raw material mixing process.
In this embodiment, the rotary lifting mechanism includes a frame 13 disposed on the frame 1, a cylinder 2 is rotatably connected to the top of the frame 13, the cylinder 2 is disposed above the reaction kettle 4, the top end of the rotating shaft 5 is connected to the lower portion of the cylinder 2, a first gear 21 is disposed outside the lower portion of the cylinder 2, a motor 3 is disposed below the top of the frame 13, a second gear 31 is disposed on an output shaft of the motor 3, and the first gear 21 is meshed with the second gear 31.
In this embodiment, the annular heating assembly includes a heating jacket 11 disposed on the frame 1, the heating jacket 11 is coaxially sleeved outside the reaction kettle 4, and a plurality of heating rods 111 are disposed between the reaction and the heating jacket 11. The heating jacket 11 is filled with high-temperature heat conduction oil, and the heat conduction oil is electrically heated by the heating rod 111.
In this embodiment, the liquid return assembly includes an L-shaped liquid return pipe 72, the lower end of the liquid return pipe 72 is communicated with the lower end of the three-way valve 7, a vertical portion of the liquid return pipe 72 is disposed on the inner wall of the reaction kettle 4, a plurality of liquid outlet holes 721 are disposed on the vertical portion of the liquid return pipe 72, the liquid outlet holes 721 are all open on the inner wall of the reaction kettle 4, and an infusion pump 73 is disposed on the transverse portion of the liquid return pipe 72.
In this embodiment, a feed pipe 43, a reflux outlet 41 and a reflux inlet 42 are further disposed at the top of the reaction kettle 4, and the reflux outlet 41 and the reflux inlet 42 are both connected to the solvent reflux device. The solvent reflux device is used for guiding out and cooling the solvent evaporated at high temperature and then refluxing the solvent into the reaction kettle, so that the fluidity stability of the whole reaction system is ensured. The solvent reflux device adopts a commercially available conventional water-cooling reflux device.
The preparation method of the alkyd protective coating with high solid content and low VOC comprises the following steps:
(A) The preparation device of the alkyd resin is used for preparing the high-solid alkyd resin, and the specific method comprises the following steps: weighing the following raw materials in parts by weight: 20 parts of synthetic fatty acid, 2 parts of maleic anhydride, 8 parts of trimethylolpropane, 3 parts of dimethylbenzene, 18 parts of neopentyl glycol, 15 parts of diluent solvent and 20 parts of phthalic anhydride are put into an alkyd resin preparation device, nitrogen is introduced to heat up to 160 ℃, heat is preserved for 1h when the solvent is refluxed, the temperature is increased to 200 ℃ at a rate of 20 ℃ per hour, heat is preserved for 50min, the temperature is reduced to 155 ℃ after the heat preservation is qualified, and diluted solvent is added for dilution cooling, so that the high-solid alkyd resin is obtained;
before preparing the high solid alkyd resin, the cylinder 2 is opened, the cylinder 2 is closed after the lifting rotating shaft 5, the liquid suction pipe 52, the supporting bar 51 and the spiral plate 6 reach the maximum height, at the moment, enough space is reserved between the bottom plate of the spiral plate 6 and the bottom of the reaction kettle 4 for temporary storage of raw materials, various raw materials are put into the reaction kettle 4 through the feeding pipe 43, after the raw materials are put into the reaction kettle 4, nitrogen is injected into the reaction kettle 4, the feeding pipe 43 is closed, the liquid conveying pump 73 is opened, the raw materials enter the liquid return pipe 72 from the liquid outlet pipe 44, then are upward injected into the reaction kettle 4 from the liquid return pipe 72, flow to the bottom of the reaction kettle 4 along the inner wall of the reaction kettle 4, and the liquid conveying pump 73 is closed after the raw materials are uniformly mixed. The heating rod 111 is opened, the heating jacket 11 and the reaction kettle 4 are heated by heat conduction oil, when the temperature is raised to a certain temperature (such as 60-80 ℃), the air cylinder 2 is opened, the rotating shaft 5, the liquid suction pipe 52, the support bar 51 and the spiral plate 6 are lowered until the bottom surface of the spiral plate 6 is attached to the bottom surface of the reaction kettle 4 and can slide relatively, at the moment, the lower end of the liquid suction pipe 52 is inserted into the upper end of the liquid outlet pipe 44 and is in sealed rotary connection with the liquid outlet pipe 44, at the moment, the liquid outlet pipe 44 is communicated with the liquid suction pipe 52, the lower end of the liquid suction pipe 52 can rotate in the liquid outlet pipe 44, the air cylinder 2 is closed, the motor 3 is opened, the motor 3 drives the gear II 31 to rotate, the gear II 31 drives the gear I21 to rotate, the air cylinder 2 is driven by the air cylinder 2 to rotate, and the rotating shaft 5 and the liquid suction pipe 52 rotate, the rotating shaft 5 and the liquid suction pipe 52 drive the two groups of support bars 51 and the spiral plate 6 to rotate around the rotating shaft 5, and as the outer end of the spiral plate 6 is in sliding fit with the inner wall of the reaction kettle 4, when the spiral plate 6 rotates, the material with the hotter outer ring continuously moves from the outer ring to the center of the reaction kettle 4 along the spiral plate 6, the liquid suction pump 73 is opened, the material with the colder center of the reaction kettle 4 is uniformly sucked into the liquid suction pipe 52 from top to bottom through the liquid suction hole 521, then is conveyed to the inner wall of the reaction kettle 4 through the liquid return pipe 72, is injected into the outer ring of the reaction kettle 4 for heating through the liquid outlet 721, so that the material is stirred from outside to inside, and the uniform heating and heat conduction of the material can be rapidly completed through the internal-to-external transfer circulation. In order to prevent air bubbles from being introduced in the process of transferring the liquid material, when the spiral plate 6 rotates, the liquid level of the liquid material is always slightly higher than the liquid return pipe 72 and the liquid suction pipe 52, but the liquid level of the liquid material is lower than the upper edge of the spiral plate 6, so that the material is prevented from being separated by the spiral plate 6 when the spiral plate 6 rotates, and the directionality of the material flow is affected. After the preparation reaction is finished, the lifting rotating shaft 5, the liquid suction pipe 52 and the spiral plate 6 are reset, the three-way valve 7 is rotated, the liquid outlet pipe 44 and the liquid return pipe 72 are disconnected, the liquid outlet pipe 71 and the liquid outlet pipe 44 are conducted, and the final product alkyd resin is pumped out or discharged.
(B) Adding 40-50 parts by weight of high-solid alkyd resin and 40-50 parts by weight of diluent solvent into a dispersion cylinder, stirring and mixing, sequentially adding lead-free pigment and rust-proof pigment, and stirring and mixing uniformly;
(C) Sucking the dispersed slurry into a sand mill, and grinding at a rotating speed of 500-600 rpm until the fineness of the slurry is less than 30 mu m, wherein the slurry is in a stable state;
(D) Pumping the ground slurry into a paint mixing cylinder, simultaneously flushing the residual slurry adhered in the sand mill into the paint mixing cylinder by using 40-50 parts by weight of a diluted solvent, adding a lead-free drier and 40-50 parts by weight of high-solid alkyd resin, and uniformly stirring in the paint mixing cylinder to obtain the alkyd protective coating.
In this embodiment, the diluting solvent is ethylene glycol diacetate or methyl ethyl formate, and the lead-free drier is one or more of cobalt, manganese, iron, zinc, calcium metal oxide or metal salt or rare earth drier.
Example 2: the rest is the same as in example 1, except that the raw materials are proportioned (weight parts): 24 parts of synthetic fatty acid, 4 parts of maleic anhydride, 12 parts of trimethylolpropane, 3 parts of dimethylbenzene, 25 parts of neopentyl glycol, 15 parts of diluent solvent and 28 parts of phthalic anhydride are added into an alkyd resin preparation device, the temperature is raised to 180 ℃ by introducing nitrogen, the temperature is kept for 1h when the solvent is refluxed, the temperature is raised to 220 ℃ at a rate of 20 ℃ per hour, the temperature is kept for 65min, and the temperature is lowered to 175 ℃ after the esterification is qualified. The dilution solvent is ethyl methyl formate.
Example 3: the rest is the same as in example 1, except that the raw materials are proportioned (weight parts): 22 parts of synthetic fatty acid, 3 parts of maleic anhydride, 10 parts of trimethylolpropane, 3 parts of dimethylbenzene, 21 parts of neopentyl glycol, 15 parts of diluent solvent and 24 parts of phthalic anhydride are added into an alkyd resin preparation device, the temperature is raised to 170 ℃ by introducing nitrogen, the temperature is kept for 1h when the solvent is refluxed, the temperature is raised to 210 ℃ at a rate of 20 ℃ per hour, the temperature is kept for 55min, and the temperature is lowered to 165 ℃ after the esterification is qualified. The dilution solvent is ethylene glycol diacetate.
Comparative examples: the raw materials and preparation method are the same as in example 1, except that a conventional stirred-blade reactor is used for preparing the high-solid alkyd resin.
The alkyd resins for HG/T4763-2014 coatings were used to examine the various indices and gas content of the high solids alkyd resins prepared in examples 1-3 and comparative examples:
TABLE 1 Performance index of high solids alkyd resins
| Example 3 | Transparent liquid | 79～83％ | ＜15 | 150 | 3500～4500 | 0.05 |
| Comparative examples | Transparent liquid | 75～79％ | ＜15 | 150 | 6000～8000 | 5.90 |
The results in table 1 show that the alkyd resin preparation device can effectively reduce the gas or bubble content in the resin, and simultaneously, the material uniformly spiral pushing-in mode can uniformly conduct heat, so that the material on the outer ring is prevented from being heated continuously to increase the polymerization degree and viscosity, the reaction of the whole material is more uniform, the esterification reaction is more uniform due to the slow and uniform temperature rising, the esterification product with the molecular mass distribution as narrow and uniform as possible can be conveniently formed due to the long reaction time at low temperature, the viscosity of the resin is reduced, and the coating performance is improved.
The high solids low VOC alkyd protective coating products prepared in examples 1-3 and comparative examples were applied to the surface of steel structures and the coating properties were measured according to national standards such as GB/T1728-2020 paint film, putty film drying time measurement, GB/T1750-1979 (1989) paint leveling method, GB/T1743-1979 (1989) paint film gloss measurement, GB/T1732-2020 paint film impact resistance measurement, GB/T1731-1993 paint film flexibility measurement, GB/T9286-1998 paint and varnish paint film cross-cut test, GB/T1763-1979 (1989) paint film chemical resistance measurement, and the like, as follows:
table 2 coating performance test results of coating
| Performance of | Example 1 | Example 2 | Example 3 | Comparative examples |
| Appearance of the coating | Bright and smooth | Bright and smooth | Bright and smooth | Bright but with relief |
| Bubble generation by thick coating | Whether or not | Whether or not | Whether or not | A small amount of |
| Surface dryness/min | 45 | 55 | 50 | 50 |
| Real dry/h | 5 | 4 | 5 | 6 |
| Adhesion/grade | 1 | 1 | 1 | 2 |
| Flexibility/mm | 2.5 | 2 | 2.5 | 2 |
| Impact resistance/cm | 60 | 65 | 65 | 50 |
| Gloss/% | 99 | 99 | 99 | 95 |
| Resistant to 5% NaOH | Paint film is nondestructive for 7 days | Paint film is nondestructive for 7 days | Paint film is nondestructive for 7 days | Rupture of the blister |
| 5%H resistance 2 SO 4 | Paint film is nondestructive for 7 days | Paint film is nondestructive for 7 days | Paint film is nondestructive for 7 days | Rupture of the blister |
| 3% NaCl resistance | Paint film is nondestructive for 7 days | Paint film is nondestructive for 7 days | Paint film is nondestructive for 7 days | Rupture of the blister |
Because the resin contains a small amount of bubbles, a small amount of bubbles appear on the surface of the coating after the coating, the gloss of the coating is affected after the coating is dried and broken, the acid-base resistance and salt resistance protection performance of the coating are also seriously affected, in addition, the leveling performance of the coating is poorer after the viscosity of the resin is increased, the uniform thickness and smooth appearance of the coating are difficult to ensure in the coating process, the fluctuation of the surface of the coating is easy to generate, and the impact resistance of the coating at a thinner part is obviously reduced due to uneven thickness of the coating, so that the coating performance of the coating is seriously affected.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (4)
1. The utility model provides a preparation facilities of high solid low VOC alkyd resin, its characterized in that, including frame (1), be equipped with annular heating element on frame (1), annular heating element endotheca is equipped with reation kettle (4), reation kettle (4) top is equipped with rotatory elevating system, rotatory elevating system has material orientation transfer subassembly down, material orientation transfer subassembly upper portion and reation kettle (4) top central sliding connection, material orientation transfer subassembly middle-lower part locate reation kettle (4) in and with reation kettle (4) inner wall sliding connection, reation kettle (4) bottom central authorities are equipped with drain pipe (44), the lower extreme of drain pipe (44) is equipped with three-way valve (7), one side intercommunication of three-way valve (7) has discharging pipe (71), the lower extreme intercommunication of three-way valve (7) has the liquid return subassembly, the upper portion intercommunication of liquid return subassembly is on reation kettle (4) lateral wall, rotatory elevating system is used for controlling the lift and the rotation of orientation transfer subassembly, when orientation transfer subassembly's bottom and the inside and outside of reation kettle (4) are transferred to the orientation transfer subassembly when orientation transfer subassembly down and bottom and the bottom orientation transfer to the inside of reation kettle (4) and seal the material to take turns to the outside the central authorities (44), the liquid return component extracts the material in the center of the reaction kettle (4) and then reinjects the material into the reaction kettle (4) from the inner wall of the reaction kettle (4);
the directional transfer assembly comprises a rotating shaft (5) arranged below the rotary lifting mechanism, the rotating shaft (5) is in sliding connection with the top center of the reaction kettle (4), a liquid suction pipe (52) is coaxially arranged below the rotating shaft (5), a plurality of liquid suction holes (521) are uniformly formed in the liquid suction pipe (52), a group of cross support bars (51) are respectively arranged on the rotating shaft (5) and the liquid suction pipe (52), a spiral plate (6) is arranged between the two groups of support bars (51), the spiral plate (6) surrounds the rotating shaft (5) in a spiral mode, the outer end of the spiral plate (6) is in sliding connection with the inner wall of the reaction kettle (4), and when the spiral plate (6) descends to the bottom surface to be attached to the inner bottom surface of the reaction kettle (4), the lower end of the liquid suction pipe (52) is inserted into the upper end of the liquid outlet pipe (44) and is in sealing and rotating connection with the liquid outlet pipe (44);
the rotary lifting mechanism comprises a frame (13) arranged on a rack (1), the top of the frame (13) is rotationally connected with a cylinder (2), the cylinder (2) is arranged above a reaction kettle (4), the top end of a rotating shaft (5) is connected under a telescopic rod of the cylinder (2), a first gear (21) is arranged outside the lower part of the cylinder (2), a motor (3) is arranged below the top of the frame (13), a second gear (31) is arranged on an output shaft of the motor (3), and the first gear (21) is meshed with the second gear (31);
the annular heating assembly comprises a heating jacket (11) arranged on the frame (1), the heating jacket (11) is coaxially sleeved outside the reaction kettle (4), and a plurality of heating rods (111) are arranged between the outer wall of the reaction kettle (4) and the heating jacket (11);
the liquid return assembly comprises an L-shaped liquid return pipe (72), the lower end of the liquid return pipe (72) is communicated with the lower end of a three-way valve (7), the vertical part of the liquid return pipe (72) is arranged on the inner wall of the reaction kettle (4), a plurality of liquid outlet holes (721) are formed in the vertical part of the liquid return pipe (72), the liquid outlet holes (721) are all opened on the inner wall of the reaction kettle (4), and an infusion pump (73) is arranged on the transverse part of the liquid return pipe (72);
the top of the reaction kettle (4) is also provided with a feeding pipe (43), a reflux outlet (41) and a reflux inlet (42), and the reflux outlet (41) and the reflux inlet (42) are both connected with a solvent reflux device.
2. The preparation method of the high-solid low-VOC alkyd protective coating is characterized by comprising the following steps of:
(A) The preparation device of the alkyd resin disclosed in claim 1 is used for preparing the high-solid alkyd resin, and the preparation method comprises the following specific steps: before preparing the high-solid alkyd resin, opening the cylinder (2), lifting the rotating shaft (5), the liquid suction pipe (52), the supporting bar (51) and the spiral plate (6) to the maximum height, closing the cylinder (2), leaving enough space between the bottom plate of the spiral plate (6) and the bottom of the reaction kettle (4) for temporary storage of raw materials, throwing various raw materials into the reaction kettle (4) through the feeding pipe (43), after finishing feeding, injecting nitrogen into the reaction kettle (4), closing the feeding pipe (43), opening the liquid conveying pump (73), enabling the raw materials to enter the liquid return pipe (72) from the liquid outlet pipe (44), then injecting the raw materials into the reaction kettle (4) from the liquid return pipe (72) in an ascending manner, flowing to the bottom of the reaction kettle (4) along the inner wall of the reaction kettle (4), and closing the liquid conveying pump (73) after uniformly mixing the raw materials; opening a heating rod (111), heating a jacket (11) and a reaction kettle (4) through heat conduction oil, when the temperature rises to a certain temperature, opening a cylinder (2), descending a rotating shaft (5), a liquid suction pipe (52), a support bar (51) and a spiral plate (6), until the bottom surface of the spiral plate (6) is in contact with the bottom surface of the reaction kettle (4) and can slide relatively, at the moment, the lower end of the liquid suction pipe (52) is inserted into the upper end of a liquid outlet pipe (44) and is in sealed rotary connection with the liquid outlet pipe (44), at the moment, the liquid outlet pipe (44) is communicated with the liquid suction pipe (52), the lower end of the liquid suction pipe (52) can rotate in the liquid outlet pipe (44), closing the cylinder (2), opening a motor (3), driving a gear II (31) to rotate by the motor (3), driving a gear I (21) to rotate by the gear II (31), driving the cylinder (2) to rotate, driving the rotating shaft (5) and the liquid suction pipe (52) to rotate, driving two groups of support bars (51) and the spiral plate (6) to rotate around the rotating shaft (5), the rotating along the spiral plate (6) and the outer ring (6) to rotate along the outer ring (6) and the spiral plate (6) and the outer ring (4) to rotate, and the material does not move along the outer ring (4), the method comprises the steps that an infusion pump (73) is started, a relatively cold material in the center of a reaction kettle (4) is uniformly sucked into a liquid suction pipe (52) from top to bottom through a liquid suction hole (521), then is conveyed to the inner wall of the reaction kettle (4) through a liquid return pipe (72), is injected into the outer ring of the reaction kettle (4) to be heated through a liquid outlet hole (721), so that the material is stirred from outside to inside, and then can be rapidly heated and conducted through a transfer cycle from inside to outside, in order to prevent air bubbles from being introduced in the transfer process of the liquid material, when a spiral plate (6) rotates, the liquid level of the liquid material is always slightly higher than that of a liquid return pipe (72) and the liquid suction pipe (52), but the liquid level of the liquid material is lower than the upper edge of the spiral plate (6), the material is prevented from being separated by the spiral plate (6) when the spiral plate (6) rotates, the directionality of the material flow is influenced, after the preparation reaction is finished, a rotating shaft (5), the liquid suction pipe (52) and the spiral plate (6) are reset, a three-way valve (7) is rotated, the liquid outlet pipe (44) and the liquid return pipe (72) and the liquid outlet pipe (71) and the liquid outlet pipe (44) or the alkyd resin product are disconnected;
weighing the following raw materials in parts by weight: 20-24 parts of synthetic fatty acid, 2-4 parts of maleic anhydride, 8-12 parts of trimethylolpropane, 3 parts of dimethylbenzene, 18-25 parts of neopentyl glycol, 15 parts of diluent solvent and 20-28 parts of phthalic anhydride are put into an alkyd resin preparation device, nitrogen is introduced to heat up to 160-180 ℃, heat preservation is carried out for 1h when the solvent is refluxed, the temperature is increased to 200-220 ℃ at a rate of 20 ℃ per hour, heat preservation is carried out for 50-65min, cooling is carried out to 155-175 ℃ after the heat preservation esterification is qualified, and diluent solvent is added for diluent cooling, thus obtaining the alkyd resin with high solid content;
(B) Adding 40-50 parts by weight of high-solid alkyd resin and 40-50 parts by weight of diluent solvent into a dispersion cylinder, stirring and mixing, sequentially adding lead-free pigment and rust-proof pigment, and stirring and mixing uniformly;
(C) Sucking the dispersed slurry into a sand mill, and grinding at a rotating speed of 500-600 rpm until the fineness of the slurry is less than 30 mu m, wherein the slurry is in a stable state;
(D) Pumping the ground slurry into a paint mixing cylinder, simultaneously flushing the residual slurry adhered in the sand mill into the paint mixing cylinder by using 40-50 parts by weight of a diluted solvent, adding a lead-free drier and 40-50 parts by weight of high-solid alkyd resin, and uniformly stirring in the paint mixing cylinder to obtain the required high-solid low-VOC alkyd protective coating.
3. The method for preparing the high-solid low-VOC alkyd protective coating according to claim 2, wherein the diluent solvent is ethylene glycol diacetate or methyl ethyl formate, and the lead-free drier is one or a mixture of a metal oxide or a metal salt of cobalt, manganese, iron, zinc and calcium or a rare earth drier.
4. A high solids low VOC alkyd protective coating prepared by the method of claim 3 for the protection of steel structures in plants, bridges, municipal and mechanical equipment.
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| CN116215933B (en) * | 2023-04-28 | 2023-07-21 | 河北化工医药职业技术学院 | Hose filling device for anhydrous lanolin |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000271463A (en) * | 1999-03-25 | 2000-10-03 | Mitsubishi Paper Mills Ltd | Inline dynamic mixing device |
| CN1833769A (en) * | 2006-02-28 | 2006-09-20 | 杨第伦 | Multipurpose bubble liquid film reactor |
| CN102091586A (en) * | 2010-12-27 | 2011-06-15 | 广州合成材料研究院有限公司 | Gas liquid phase reactor |
| CN205340303U (en) * | 2016-01-26 | 2016-06-29 | 佛山市高明鸿源纸业有限公司 | Light -duty paper production facility of improved generation |
| CN106046332A (en) * | 2016-05-30 | 2016-10-26 | 山东齐鲁漆业有限公司 | Low-VOC-content alkyd resin and application of low-VOC-content alkyd resin in coating |
| WO2017192966A1 (en) * | 2016-05-06 | 2017-11-09 | Sudhin Biopharma | Particle setting devices |
| CN107828053A (en) * | 2017-09-30 | 2018-03-23 | 合众（佛山）化工有限公司 | A kind of net taste alkyd resin of high-solid lower-viscosity and preparation method thereof |
| CN107857873A (en) * | 2017-09-30 | 2018-03-30 | 合众（佛山）化工有限公司 | A kind of alkyd resin of 90% large arch dam and preparation method thereof |
| KR20190136901A (en) * | 2018-05-31 | 2019-12-10 | 저지앙 빙리거 일렉트로 메커니컬 컴퍼니 리미티드 | Scraper assembly for evaporator of ice machine and evaporator of ice machine |
| CN113024755A (en) * | 2020-03-27 | 2021-06-25 | 江苏国立化工科技有限公司 | Preparation method of resorcinol resin for rubber adhesive and special device thereof |
| CN113171702A (en) * | 2021-05-07 | 2021-07-27 | 浙江荣泰电工器材有限公司 | Prevent heavy thick liquid mica thick liquid and divide thick liquid device |
-
2022
- 2022-01-17 CN CN202210047530.6A patent/CN114452922B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000271463A (en) * | 1999-03-25 | 2000-10-03 | Mitsubishi Paper Mills Ltd | Inline dynamic mixing device |
| CN1833769A (en) * | 2006-02-28 | 2006-09-20 | 杨第伦 | Multipurpose bubble liquid film reactor |
| CN102091586A (en) * | 2010-12-27 | 2011-06-15 | 广州合成材料研究院有限公司 | Gas liquid phase reactor |
| CN205340303U (en) * | 2016-01-26 | 2016-06-29 | 佛山市高明鸿源纸业有限公司 | Light -duty paper production facility of improved generation |
| WO2017192966A1 (en) * | 2016-05-06 | 2017-11-09 | Sudhin Biopharma | Particle setting devices |
| CN106046332A (en) * | 2016-05-30 | 2016-10-26 | 山东齐鲁漆业有限公司 | Low-VOC-content alkyd resin and application of low-VOC-content alkyd resin in coating |
| CN107828053A (en) * | 2017-09-30 | 2018-03-23 | 合众（佛山）化工有限公司 | A kind of net taste alkyd resin of high-solid lower-viscosity and preparation method thereof |
| CN107857873A (en) * | 2017-09-30 | 2018-03-30 | 合众（佛山）化工有限公司 | A kind of alkyd resin of 90% large arch dam and preparation method thereof |
| KR20190136901A (en) * | 2018-05-31 | 2019-12-10 | 저지앙 빙리거 일렉트로 메커니컬 컴퍼니 리미티드 | Scraper assembly for evaporator of ice machine and evaporator of ice machine |
| CN113024755A (en) * | 2020-03-27 | 2021-06-25 | 江苏国立化工科技有限公司 | Preparation method of resorcinol resin for rubber adhesive and special device thereof |
| CN113171702A (en) * | 2021-05-07 | 2021-07-27 | 浙江荣泰电工器材有限公司 | Prevent heavy thick liquid mica thick liquid and divide thick liquid device |
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