CN111139125A - Water-based precoating type high-temperature anti-seizure agent and preparation method and application thereof - Google Patents
Water-based precoating type high-temperature anti-seizure agent and preparation method and application thereof Download PDFInfo
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- CN111139125A CN111139125A CN201911425314.5A CN201911425314A CN111139125A CN 111139125 A CN111139125 A CN 111139125A CN 201911425314 A CN201911425314 A CN 201911425314A CN 111139125 A CN111139125 A CN 111139125A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/087—Boron oxides, acids or salts
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/105—Silica
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
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- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
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- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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Abstract
The invention relates to a water-based precoating type high-temperature anti-seizure agent, a preparation method and application thereof, wherein the water-based precoating type high-temperature anti-seizure agent comprises deionized water, an adhesive, hexagonal boron nitride, fatty alcohol-polyoxyethylene ether, liquid mineral oil and a pigment in a specific ratio, and can integrally realize the high-temperature environment resistant to 1000 ℃. The water-based precoating type high-temperature anti-seizure agent is not required to be coated for use at present, can be concentrated in advance and quantitatively coated on the threads of the fasteners, directly forms an anti-seizure dry film on the threads of the fasteners through high-temperature drying, can reduce the friction coefficient of the fasteners during tightening, prevents the fasteners from being stuck when being tightened and disassembled, and is more convenient to use.
Description
Technical Field
The invention relates to a water-based precoating type high-temperature anti-seizure agent, and a preparation method and application thereof.
Background
Fasteners used in nuclear power, gas turbine, thermal power generator, aircraft engine, etc. often encounter high temperature environments of 650-1000 ℃. The fastener working in the high-temperature environment for a long time is easy to be stuck, and great difficulty is brought to maintenance and disassembly. The industry often adopts the mode of applying anti-seizure agent to solve the easy dead problem of fastener.
At present, the common anti-seizure agent is viscous paste oily high-temperature anti-seizure agent, and graphite or molybdenum disulfide is mainly used as a high-temperature lubricant. For example, patent No. CN201010257838.0 discloses a composite high-performance high-temperature anti-seizing agent, which comprises 35% of solid material and 65% of liquid material by weight; wherein, in the solid material, 32-34% of graphite with the fineness of 5000 meshes, 37-39% of graphite with the fineness of 10000 meshes and 28-30% of boron nitride with the fineness of 1250 meshes are contained; in the liquid material, 70-75% of polyisobutylene and 25-30% of dimethyl silicone oil are used.
However, due to high temperature oxidation, the lubricating properties of graphite and molybdenum disulfide are greatly degraded when ambient temperatures exceed 650 ℃. In addition, when the oily paste high-temperature anti-seizure agent is used, the agent needs to be coated as before, so that the problems of missing coating, less coating and more coating are easy to occur, and the use is inconvenient.
Disclosure of Invention
Based on the above, there is a need for a water-based precoating type high temperature anti-seizure agent, and a preparation method and application thereof. The water-based precoating type high-temperature anti-seizure agent is not required to be coated for use at present, can be concentrated in advance and quantitatively coated on the threads of the fasteners, directly forms an anti-seizure dry film on the threads of the fasteners through high-temperature drying, can reduce the friction coefficient of the fasteners during tightening, prevents the fasteners from being stuck when being tightened and disassembled, and is more convenient to use.
The technical scheme for solving the technical problems is as follows:
the invention provides a water-based precoating type high-temperature anti-seizure agent, which is mainly prepared from the following raw materials in parts by weight:
preferably, the water-based precoating type high-temperature anti-seizure agent is mainly prepared from the following raw materials in parts by weight:
more preferably, the water-based precoating type high-temperature anti-seizure agent is mainly prepared from the following raw materials in parts by weight:
wherein, the fatty alcohol polyoxyethylene ether is used as an emulsifier and has a general formula of RO- (CH)2CH2O) n-H, the number of carbon chains of R is more than 7, and n is more than 6.
In one embodiment, the water-based precoating high temperature seizure resistant agent further comprises a thixotropic agent, wherein the weight ratio of the thixotropic agent to the hexagonal boron nitride is (3-8): (30-80). Preferably, the thixotropic agent is selected from one or more of hydrophilic fumed silica, hydroxymethyl cellulose, polyacrylamide.
In one embodiment, the adhesive is selected from a water soluble polymer and/or an aqueous pressure sensitive emulsion. Preferably, the water-soluble polymer is selected from one or two of polyvinyl alcohol and polyethylene glycol; and/or the aqueous pressure-sensitive emulsion is selected from one or more of acrylate pressure-sensitive emulsion and polyurethane pressure-sensitive emulsion.
More preferably, the adhesive is selected from one or more of polyvinyl alcohol 1788, polyethylene glycol 1000, polyethylene glycol 2000, acrylate pressure sensitive emulsion, and polyurethane pressure sensitive emulsion.
In one embodiment, the pigment is selected from one or more of phthalocyanine blue, titanium dioxide and iron oxide red.
The invention also provides a preparation method of the water-based precoating type high-temperature anti-seizure agent, which comprises the following steps:
weighing the raw materials according to the water-based precoating type high-temperature anti-seizure agent;
and adding the adhesive into deionized water, completely dissolving, sequentially adding fatty alcohol-polyoxyethylene ether and liquid mineral oil, uniformly stirring, adding hexagonal boron nitride, uniformly stirring and defoaming to obtain the adhesive.
The use of the above-described water-based precoating high temperature seizure resistant agent in fastener assembly.
The water-based precoating type high-temperature anti-seizure agent can realize the high-temperature environment resistant to 1000 ℃ on the whole by screening the components with specific types and proportions. After the water-based precoating type high-temperature anti-seizure agent is coated on the threads of the fastener, the water is volatilized through high-temperature drying, a layer of dry film with lubricating and anti-seizing properties can be formed on the threads of the fastener, the dry film is good in adhesive force and not easy to fall off.
Compared with the conventional ointment anti-seizure agent, the water-based precoating type high-temperature anti-seizure agent provided by the invention is not required to be applied at present, can be pre-concentrated and quantitatively applied to the threads of the fastening piece, and can be dried at high temperature to directly form an anti-seizure dry film on the threads of the fastening piece, so that the friction coefficient of the fastening piece during fastening can be reduced, the fastening piece can be prevented from being stuck during fastening and dismounting, the use is more convenient, the efficiency is higher, the water-based precoating type high-temperature anti-seizure agent is suitable for assembly line operation, the water-based precoating type high-temperature anti.
In addition, it is worth mentioning that the applicant has found that ointment anti-bites containing graphite or molybdenum disulphide are both black products, which are not easy to distinguish whether anti-bites are applied or not, and difficult to tint and difficult to manage visually for dark (especially black) surface fasteners.
The anti-occlusion agent is prepared by compounding water, an adhesive, fatty alcohol-polyoxyethylene ether, liquid mineral oil and a pigment with white hexagonal boron nitride for the first time, anti-occlusion agent products with various color requirements can be obtained through pigment adjustment, the anti-occlusion agent is more convenient to use, and the requirements of visual management are met.
Detailed Description
The present invention is described below by way of example, which is only for the purpose of explaining the present invention and is not intended to limit the scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Source of raw materials
The hexagonal boron nitride was purchased from Weifang Zhuyu New Material science and technology Co., Ltd;
fatty alcohol polyoxyethylene ether AEO9 was purchased from Dow chemical;
polyvinyl alcohol 1788 was purchased from china petrochemical Shanghai petrochemical company, Inc.;
polyethylene glycol 1000 and polyethylene glycol 2000 are purchased from Haian petrochemical plants in Jiangsu province;
the acrylate pressure sensitive emulsion PS9340 was purchased from Rohm and Haas, Inc. of Beijing Oriental;
polyurethane pressure sensitive emulsion Witcobond447-05 from Langsheng chemical;
high purity graphite was purchased from Qingdao Tianyuan graphite GmbH;
molybdenum disulfide was purchased from Shanghai Huayi group Huayuan chemical Co., Ltd;
the rest of the reagents are conventional and commercially available.
Example 1
The embodiment provides a water-based precoating type high-temperature anti-seizure agent, which is prepared from the following raw materials in parts by weight: 100 parts of deionized water, 5 parts of polyethylene glycol 2000(PEG2000), 1.0 part of fatty alcohol-polyoxyethylene ether AEO9, 1 part of No. 15 white oil and 10 parts of 500-mesh hexagonal boron nitride powder.
The preparation method of the water-based precoating type high-temperature anti-seizure agent of this example includes the following steps:
s1, adding deionized water and PEG2000 into a mixing container, heating to 70-80 ℃, and stirring until the adhesive is completely dissolved to obtain an adhesive solution.
S2, sequentially adding fatty alcohol-polyoxyethylene ether AEO9 and No. 15 white oil into the adhesive solution, stirring, and uniformly dispersing to obtain an intermediate mixed solution.
And S3, adding 500-mesh hexagonal boron nitride powder into the intermediate mixed solution, stirring, and uniformly dispersing to obtain a crude product.
And S4, vacuumizing and defoaming the crude product, wherein the vacuum pressure is-0.09 to-0.07 Mpa, and the defoaming time is 5 min.
Example 2
The embodiment provides a water-based precoating type high-temperature anti-seizure agent, which is prepared from the following raw materials in parts by weight: 100 parts of deionized water, 20 parts of polyethylene glycol 1000(PEG1000), 5 parts of fatty alcohol-polyoxyethylene ether AEO9, 5 parts of No. 15 white oil, 40 parts of 500-mesh hexagonal boron nitride powder, 6 parts of fumed silica AS-150 and 1 part of phthalocyanine blue pigment.
The preparation method of the water-based precoating type high-temperature anti-seizure agent of this example includes the following steps:
s1, adding deionized water and PEG1000 into the mixing container, heating to 70-80 ℃, and stirring until the adhesive is completely dissolved to obtain an adhesive solution.
S2, sequentially adding fatty alcohol-polyoxyethylene ether AEO9 and No. 15 white oil into the adhesive solution, stirring, and uniformly dispersing to obtain an intermediate mixed solution.
And S3, adding 500-mesh hexagonal boron nitride powder, fumed silica AS-150 and phthalocyanine blue pigment into the intermediate mixed solution, stirring, and uniformly dispersing to obtain a crude product.
And S4, vacuumizing and defoaming the crude product, wherein the vacuum pressure is-0.09 to-0.07 Mpa, and the defoaming time is 5 min.
Example 3
The embodiment provides a water-based precoating type high-temperature anti-seizure agent, which is prepared from the following raw materials in parts by weight: 100 parts of deionized water, 15 parts of polyvinyl alcohol 1788, 5 parts of fatty alcohol-polyoxyethylene ether AEO9, 10 parts of No. 24 white oil, 60 parts of 1000-mesh hexagonal boron nitride powder, 6 parts of fumed silica AS-150 and 1 part of titanium dioxide.
The preparation method of the water-based precoating type high-temperature anti-seizure agent of this example includes the following steps:
s1, adding deionized water and polyvinyl alcohol 1788 into the mixing container, heating to 70-80 ℃, and stirring until the adhesive is completely dissolved to obtain an adhesive solution.
S2, sequentially adding fatty alcohol-polyoxyethylene ether AEO9 and No. 15 white oil into the adhesive solution, stirring, and uniformly dispersing to obtain an intermediate mixed solution.
And S3, adding 1000-mesh hexagonal boron nitride powder, thixotropic agent fumed silica AS-150 and titanium dioxide into the intermediate mixed solution, stirring, and uniformly dispersing to obtain a crude product.
And S4, vacuumizing and defoaming the crude product, wherein the vacuum pressure is-0.09 to-0.07 Mpa, and the defoaming time is 5 min.
Example 4
The embodiment provides a water-based precoating type high-temperature anti-seizure agent, which is prepared from the following raw materials in parts by weight: 100 parts of deionized water, 15 parts of acrylic pressure-sensitive emulsion PS9340, 4 parts of fatty alcohol-polyoxyethylene ether AEO9, 10 parts of No. 24 white oil, 50 parts of 1250-mesh hexagonal boron nitride powder, 4 parts of fumed silica AS-150 and 1 part of iron oxide red.
The preparation method of the water-based precoating type high-temperature anti-seizure agent of this example includes the following steps:
s1, adding the deionized water and the acrylic pressure-sensitive emulsion PS9340 into a mixing container, and stirring until the adhesive is completely dissolved to obtain an adhesive solution.
S2, sequentially adding fatty alcohol-polyoxyethylene ether AEO9 and No. 15 white oil into the adhesive solution, stirring, and uniformly dispersing to obtain an intermediate mixed solution.
And S3, adding 1250-mesh hexagonal boron nitride powder, fumed silica AS-150 and iron oxide red into the intermediate mixed solution, stirring, and uniformly dispersing to obtain a crude product.
And S4, vacuumizing and defoaming the crude product, wherein the vacuum pressure is-0.09 to-0.07 Mpa, and the defoaming time is 5 min.
Example 5
The embodiment provides a water-based precoating type high-temperature anti-seizure agent, which is prepared from the following raw materials in parts by weight: 100 parts of deionized water, 20 parts of acrylic pressure-sensitive emulsion PS9340, 5 parts of fatty alcohol-polyoxyethylene ether AEO9, 10 parts of No. 18 white oil, 100 parts of 500-mesh hexagonal boron nitride powder and 1 part of iron oxide red.
The preparation method of the water-based precoating type high-temperature anti-seizure agent of this example includes the following steps:
and S1, adding the deionized water and the acrylic pressure-sensitive emulsion PS9340 into a mixing container, and stirring until the adhesive is uniformly dispersed to obtain the adhesive dispersion.
S2, sequentially adding fatty alcohol-polyoxyethylene ether AEO9 and No. 15 white oil into the adhesive dispersoid, stirring, and uniformly dispersing to obtain an intermediate mixed solution.
And S3, adding 500-mesh hexagonal boron nitride powder, fumed silica AS-150 and iron oxide red into the intermediate mixed solution, stirring, and uniformly dispersing to obtain a crude product.
And S4, vacuumizing and defoaming the crude product, wherein the vacuum pressure is-0.09 to-0.07 Mpa, and the defoaming time is 5 min.
Example 6
The embodiment provides a water-based precoating type high-temperature anti-seizure agent, which is prepared from the following raw materials in parts by weight: 100 parts of deionized water, 18 parts of polyurethane pressure-sensitive emulsion Witcobond447-05, 4 parts of fatty alcohol-polyoxyethylene ether AEO9, 10 parts of No. 18 white oil, 80 parts of 1000-mesh hexagonal boron nitride powder, 2 parts of hydroxymethyl cellulose, 2 parts of polyacrylamide and 1 part of iron oxide red.
The preparation method of the water-based precoating type high-temperature anti-seizure agent of this example includes the following steps:
s1, adding deionized water and the polyurethane pressure-sensitive emulsion Witcobond447-05 into a mixing container, and stirring until the adhesive is uniformly dispersed to obtain the adhesive dispersion.
S2, sequentially adding fatty alcohol-polyoxyethylene ether AEO9 and No. 15 white oil into the adhesive dispersoid, stirring, and uniformly dispersing to obtain an intermediate mixed solution.
And S3, adding 1000-mesh hexagonal boron nitride powder, hydroxymethyl cellulose, polyacrylamide and iron oxide red into the intermediate mixed solution, stirring, and uniformly dispersing to obtain a crude product.
And S4, vacuumizing and defoaming the crude product, wherein the vacuum pressure is-0.09 to-0.07 Mpa, and the defoaming time is 5 min.
Comparative example 1
This comparative example provides a water-based precoating high temperature seizure resistant agent having substantially the same composition as example 1, except that: 10 parts of 500-mesh high-purity graphite is adopted to replace 10 parts of 500-mesh hexagonal boron nitride powder.
The water-based precoating high temperature seizure preventive agent of this comparative example was prepared in the same manner as in example 1.
Comparative example 2
This comparative example provides a high temperature seizure resistance agent having substantially the same composition as example 1, except that: 60 parts of 500-mesh high-purity graphite is adopted to replace 10 parts of 500-mesh hexagonal boron nitride powder, and the using amount of No. 15 white oil is 10 parts.
The water-based precoating high temperature seizure preventive agent of this comparative example was prepared in the same manner as in example 1.
Comparative example 3
This comparative example provides a high temperature seizure resistance agent having substantially the same composition as example 4, except that: 50 parts of 1250-mesh molybdenum disulfide powder is adopted to replace 50 parts of 1250-mesh hexagonal boron nitride powder.
Comparative example 4
This comparative example provides a water-based precoating high temperature seizure resistant agent having substantially the same composition as example 5, except that: 100 parts of 500-mesh high-purity graphite is adopted to replace 100 parts of 500-mesh hexagonal boron nitride powder.
The water-based precoating high temperature seizure resistant agent of this comparative example was prepared in the same manner as in example 5.
Comparative example 5
The comparative example provides a water-based precoating type high-temperature anti-seizure agent, which is prepared from the following raw materials in parts by weight: 100 parts of deionized water, 5 parts of polyethylene glycol 1000(PEG1000), 25 parts of fatty alcohol-polyoxyethylene ether AEO9, 1 part of No. 15 white oil and 5 parts of 500-mesh hexagonal boron nitride powder.
Comparative example 6
This comparative example provides a water-based precoating high temperature seizure resistant agent having substantially the same composition as example 5, except that: octyl phenol polyoxyethylene ether OP-10 is adopted to replace fatty alcohol polyoxyethylene ether AEO 9.
Comparative example 7
This comparative example provides a water-based precoating high temperature seizure resistant agent having substantially the same composition as example 5, except that: dimethyl silicone oil is adopted to replace No. 18 white oil.
And (3) performance testing:
1. coating appearance test:
the anti-seizure agents of examples 1 to 6 and comparative examples 1 to 7 were uniformly applied to 5 10.9M 10X 50 galvanized bolts, dried in a 80 ℃ constant temperature drying oven for 45min, taken out and cooled to room temperature, and then the film was observed for flatness and pinholes.
2. Adhesive force test of the adhesive film:
the anti-seizure agents of examples 1 to 6 and comparative examples 1 to 7 were uniformly applied to 5 10.9M 10 × 50 galvanized bolts, dried in a 80 ℃ constant temperature drying oven for 45min, taken out and cooled to room temperature, and then a M10 standard nut was screwed in, and it was observed whether or not a film remained in the bolt tooth socket exposed after the nut was screwed in.
Evaluation: the adhesive force is good as a continuous adhesive film exists; the adhesive film is broken and continuous, which indicates that the adhesive force is normal; the absence of a glue film indicates poor adhesion.
3. Screw-in torque test:
the anti-seizure agents of examples 1 to 6 and comparative examples 1 to 7 were uniformly applied to 5M 10 × 50 galvanized bolts of 10.9 grades, dried in a constant temperature drying oven at 80 ℃ for 45min, taken out and cooled to room temperature, and then screwed into M10 standard nuts using a digital display torque wrench capable of automatically counting, so that the bolts were exposed for 2 to 3 threads, and the maximum torque in the process was measured, i.e., the screwing torque.
4. And (3) testing the thread friction coefficient:
the anti-seizure agents of examples 1 to 6 and comparative examples 1 to 7 were uniformly applied to 10 10.9M 10X 50 galvanized bolts, dried in a constant temperature drying oven at 80 ℃ for 45min, and then taken out and cooled to room temperature. The thread friction coefficient was then tested according to GB/T16823.3.
5. High temperature seizure resistance (loosening torque after 1000 ℃) test:
the anti-seizure agents of examples 1 to 6 and comparative examples 1 to 7 were uniformly applied to 5 10.9M 10X 50 galvanized bolts, dried in a constant temperature drying oven at 80 ℃ for 45min, and then taken out and cooled to room temperature. And screwing an M10 standard nut to enable the bolt to expose 2-3 threads, then putting the bolt into a muffle furnace at 1000 ℃, aging for 24 hours, taking out the bolt after the aging time, cooling to room temperature, screwing out the nut by using a digital display torque wrench capable of automatically counting to enable the nut to be completely withdrawn, testing the maximum torque in the process, wherein the smaller the torque is, the stronger the high-temperature anti-occlusion capability is.
Note: the bolts are 10.9-grade M10 color zinc plated bolts specified in GB/T5782, and the nuts are 10-grade M10 color zinc plated nuts specified in GB/T6170. Bolt and nut matching precision: bolt 6g, nut 6H.
The performance test results are summarized in table 1 below.
TABLE 1 statistical table of performance test results
As can be seen from the above Table 1, compared with the comparative examples 1 to 7, the water-based precoating type high temperature anti-seizure agents of examples 1 to 6 simultaneously achieve the performance indexes of smooth coating appearance, no pores, good adhesive force of the adhesive film and strong high temperature anti-seizure ability.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The water-based precoating type high-temperature anti-seizure agent is characterized by being mainly prepared from the following raw materials in parts by weight:
2. the water-based precoating type high-temperature anti-seizure agent according to claim 1, which is prepared from the following raw materials in parts by weight:
3. the water-based precoating type high-temperature anti-seizure agent according to claim 2, which is prepared from the following raw materials in parts by weight:
4. the water-based precoating high temperature seizure preventive agent according to any one of claims 1 to 3, further comprising a thixotropic agent, wherein the weight ratio of the thixotropic agent to the hexagonal boron nitride is (3-8): (30-80).
5. The water-based precoating high temperature seizure preventive agent according to claim 4, wherein the thixotropic agent is selected from one or more of hydrophilic fumed silica, hydroxymethyl cellulose, and polyacrylamide.
6. The water-based precoating high temperature seizure preventive agent according to any one of claims 1 to 3, wherein the adhesive is selected from water-soluble polymers and/or aqueous pressure-sensitive emulsions.
7. The water-based precoating high temperature seizure preventive agent according to claim 6, wherein the water-soluble polymer is selected from one or both of polyvinyl alcohol and polyethylene glycol; and/or
The aqueous pressure-sensitive emulsion is selected from one or more of acrylate pressure-sensitive emulsion and polyurethane pressure-sensitive emulsion.
8. The water-based precoating high temperature seizure preventive agent according to any one of claims 1 to 3, wherein the pigment is selected from one or more of phthalocyanine blue, titanium dioxide, and red iron oxide.
9. The method of preparing the water-based precoating high temperature seizure preventive agent according to any one of claims 1 to 8, comprising the steps of:
weighing the raw materials according to the water-based precoating type high temperature seizure preventive agent claimed in any one of claims 1 to 8;
and adding the adhesive into deionized water, completely dissolving or uniformly dispersing, sequentially adding fatty alcohol-polyoxyethylene ether and liquid mineral oil, stirring, adding hexagonal boron nitride, stirring and defoaming to obtain the adhesive.
10. Use of the water-based precoating high temperature seizure resistant agent as claimed in any one of claims 1 to 8 in fastener assembly.
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| CN111139125B (en) | 2022-06-07 |
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