Environment-friendly anti-corrosion grease for overhead conductor and preparation method thereof
1. The environment-friendly anticorrosive grease is characterized by comprising the following raw materials in parts by weight:
60-80 parts of base oil
4-5 of thickening agent
5-9% of viscosity assistant
4-6 parts of film forming agent
5-15% of filler
0.5-5% of other auxiliary agents;
the base oil comprises metallocene diene copolymer, polyorganosiloxane and cyclohexane 1, 4-diisononyl phthalate; the viscosity auxiliary agent contains a benzene ring structure in the structure.
2. The environment-friendly anticorrosive grease according to claim 1, wherein the weight ratio of the metallocene-diene copolymer, the polyorganosiloxane and the cyclohexane 1, 4-diisononyl phthalate is (10-15): (20-55): (10-15).
3. The environment-friendly corrosion inhibiting grease of claim 2, wherein the base oil further comprises a pentaerythritol ester; preferably, the content ratio of the pentaerythritol ester to the polyorganosiloxane is (20-25): (20-25).
4. The environment-friendly anticorrosive grease as claimed in claim 3, wherein the kinematic viscosity of the pentaerythritol ester at 100 ℃ is 27-30 mm2/s。
5. The environment-friendly corrosion preventing grease according to claim 3, wherein the polyorganosiloxane is amino-modified polyorganosiloxane; preferably, the amino-modified polyorganosiloxane is a secondary amino-modified organosiloxane.
6. The environment-friendly anticorrosive grease according to any one of claims 1 to 5, wherein the viscosity assistant is a mixture of hydrogenated styrene-isoprene copolymer and modified nano silica; preferably, the content ratio of the modified nano silicon dioxide to the hydrogenated styrene-isoprene copolymer is (2-4): (3-5).
7. The environment-friendly anticorrosive grease according to any one of claims 1 to 5, wherein the film-forming agent is a methyl phenyl silicone resin.
8. The environment-friendly anticorrosive grease according to any one of claims 1 to 5, wherein the filler comprises a heat conductive filler; the heat-conducting filler consists of nano aluminum oxide, boron nitride and zinc oxide; further preferably, the filler further comprises melamine cyanurate salt.
9. The preparation method of the environment-friendly anticorrosive grease according to any one of claims 1 to 8, characterized by comprising the following steps:
(1) according to the proportion, pumping the base oil into a grease making kettle, heating to 50-70 ℃, adding a viscosity auxiliary agent, continuously stirring, heating to 160-180 ℃, and transferring into a blending kettle;
(2) adding a film forming agent into the mixing kettle, stirring for 30 minutes, cooling to 130-140 ℃, adding a thickening agent, and adjusting the shearing pressure to 1.0-1.2 MPa through a circulating shearing device for 1-3 hours;
(3) and then adding other auxiliary agents, continuously and circularly shearing for 0.5-2 hours, then reducing the shearing pressure to zero, adding a filler, continuously stirring and circulating for 1 hour, and then carrying out aftertreatment to obtain the modified polypropylene.
10. The application of the environment-friendly anticorrosive grease according to any one of claims 1 to 8, which is applied to the field of overhead conductors.
Background
With the rapid development of economy in China, particularly economy in coastal areas, the power supply is increasingly busy, and the use amount of overhead conductors is increased rapidly. As the coastal areas in the south are mostly in high-temperature, humid and marine environments, the overhead conductor in service can be subjected to complex corrosion damage, and particularly, the corrosion rate of the overhead conductor is increased gradually in a heavy corrosion environment which is formed by environmental pollution caused by heavy industrial production discharge and deterioration of natural environmental climate. Because the mechanical property of the rusted wire is greatly reduced, the effective maintenance-free period is obviously shortened, the possibility of serious accidents such as strand breakage, wire breakage and the like caused by corrosion is greatly increased, the safety of power transmission is seriously influenced, and the rusted wire gradually becomes a bottleneck problem which restricts the safe and efficient operation of a power grid transmission line. Therefore, the corrosion resistance of the overhead conductor is improved, and the safe and reliable operation of the power transmission line can be powerfully ensured.
According to the reports of all customs of Shanghai cable research, three corrosion prevention measures for the electric transmission line conductor are provided: coating anti-corrosion grease, replacing the steel core with an aluminum-clad steel core or a non-metal reinforced core, and replacing the zinc coating with a zinc-containing alloy coating. Among the three corrosion prevention measures, the coating of the corrosion prevention grease is undoubtedly the highest in cost performance, and is an easily-realized corrosion prevention measure, and the corrosion prevention performance of the lead is improved by preventing or delaying the penetration of a corrosive medium.
At present, cable manufacturers are limited to use the anti-corrosive grease, domestic common mineral anti-corrosive lubricating grease products are used, the model is 20A120, the high-low temperature performance is poor, the applicable temperature range is narrow, the mineral anti-corrosive lubricating grease is generally used in the range of-20 ℃ to 120 ℃, and the problems of dry cracking under severe cold conditions and serious oil flow under high-temperature operation conditions are easily caused, so that the capability of resisting external medium infiltration is further weakened, the service lives of the anti-corrosive grease and overhead conductors are sharply reduced, and the safety of a power transmission line is influenced. Moreover, the mineral type anticorrosive grease is lost to the natural environment, is not easy to degrade and causes serious pollution. Therefore, how to improve the wide temperature applicability and the environmental protection performance of the anti-corrosive grease is a technical problem to be solved urgently at present.
Disclosure of Invention
Aiming at the technical problems, the invention provides a preparation method of an environment-friendly anti-corrosive grease 40A240 for an overhead conductor, which has the use temperature range of-40-240 ℃, greatly improves the wide-temperature applicability and the environmental protection performance of the existing anti-corrosive grease, and can meet the use requirements of the overhead conductor in any area.
Specifically, the first aspect of the invention provides an environment-friendly anticorrosive grease, which is prepared from the following raw materials in parts by weight:
60-80 parts of base oil
4-5 of thickening agent
5-9% of viscosity assistant
4-6 parts of film forming agent
5-15% of filler
0.5-5% of other auxiliary agents;
the base oil comprises metallocene diene copolymer, polyorganosiloxane and cyclohexane 1, 4-diisononyl phthalate; the viscosity auxiliary agent contains a benzene ring structure in the structure.
As a preferable technical scheme of the invention, the weight ratio of the metallocene diene copolymer, the polysiloxane and the cyclohexane 1, 4-diisononyl phthalate is (10-15): (20-55): (10-15).
As a preferred technical solution of the present invention, the base oil further comprises pentaerythritol ester; preferably, the content ratio of the pentaerythritol ester to the polyorganosiloxane is (20-25): (20-25).
As a preferable technical scheme of the invention, the pentaerythritol ester is transported at 100 DEG CThe dynamic viscosity is 27-30 mm2/s。
In a preferred embodiment of the present invention, the polyorganosiloxane is an amino-modified polyorganosiloxane; preferably, the amino-modified polyorganosiloxane is a secondary amino-modified organosiloxane.
As a preferred technical scheme of the invention, the viscosity auxiliary agent is a mixture of hydrogenated styrene-isoprene copolymer and modified nano silicon dioxide; preferably, the content ratio of the modified nano silicon dioxide to the hydrogenated styrene-isoprene copolymer is (2-4): (3-5).
As a preferable technical scheme of the invention, the film-forming agent is methyl phenyl silicone resin.
As a preferred technical solution of the present invention, the filler includes a thermally conductive filler; the heat-conducting filler consists of nano aluminum oxide, boron nitride and zinc oxide; further preferably, the filler further comprises melamine cyanurate salt.
The second aspect of the present invention provides a method for preparing the environment-friendly anti-corrosive grease, which comprises the following steps:
(1) according to the proportion, pumping the base oil into a grease making kettle, heating to 50-70 ℃, adding a viscosity auxiliary agent, continuously stirring, heating to 160-180 ℃, and transferring into a blending kettle;
(2) adding a film forming agent into the mixing kettle, stirring for 30 minutes, cooling to 130-140 ℃, adding a thickening agent, and adjusting the shearing pressure to 1.0-1.2 MPa through a circulating shearing device for 1-3 hours;
(3) and then adding other auxiliary agents, continuously and circularly shearing for 0.5-2 hours, then reducing the shearing pressure to zero, adding a filler, continuously stirring and circulating for 1 hour, and then carrying out aftertreatment to obtain the modified polypropylene.
The third aspect of the invention provides the application of the environment-friendly anti-corrosive grease, which is applied to the field of overhead conductors.
Has the advantages that: the invention improves the adhesion performance of the base oil to the conducting wire to a great extent by regulating and controlling the components and the proportion of the base oil. When the metallocene diene copolymer, the polysiloxane and the cyclohexane 1, 4-diisononyl phthalate in a specific ratio are adopted, the prepared anticorrosive grease has excellent adhesion performance. The adhesion performance of the anti-corrosion grease to the lead at normal temperature can be improved by regulating and controlling the components and the proportion of the base oil, after a proper amount of pentaerythritol ester is added into the base oil, the adhesion of the anti-corrosion grease to the lead at low temperature can be obviously improved, and even when the environmental temperature is as low as-40 ℃, the anti-corrosion grease still keeps good adhesion to the lead and does not crack and the like. Moreover, by compounding the ester base oil components, the degradability of the anti-corrosive grease can be effectively improved, and the environmental pollution caused after the anti-corrosive grease is used is avoided. In addition, the proper amount of the hydrogenated styrene-isoprene copolymer is adopted in the application, the viscosity of the base oil in a system can be favorably regulated and controlled, the base oil component is prevented from seeping out at high temperature, and the unstable situations of oil seepage, oil separation and the like of the base oil can be obviously improved particularly when the micromolecule base oil which is easy to migrate, such as polypentaerythritol ester, cyclohexane 1, 4-diisononyl phthalate and the like, is adopted. Meanwhile, under the interaction of the components such as the base oil, the film forming agent and the like, the density of the formed protective film can be better improved, and the penetration of corrosive components in the environment to the inside of the protective film is avoided, so that the aging resistance and the corrosion resistance of the protective film are favorably avoided.
Drawings
FIG. 1 is a diagram of an environment-friendly anti-corrosive grease product.
FIG. 2 is a diagram of an environment-friendly anti-corrosive grease product.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. 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. In case of conflict, the present specification, including definitions, will control.
The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.
The invention provides an environment-friendly anticorrosive grease, which is prepared from the following raw materials in parts by weight:
60-80 parts of base oil
4-5 of thickening agent
5-9% of viscosity assistant
4-6 parts of film forming agent
5-15% of filler
0.5-5% of other auxiliary agents;
the base oil comprises metallocene diene copolymer, polyorganosiloxane and cyclohexane 1, 4-diisononyl phthalate; the viscosity auxiliary agent contains a benzene ring structure in the structure.
In some embodiments, the metallocene-diene copolymer, the polyorganosiloxane, and the cyclohexane 1, 4-dicarboxylic acid diisononyl ester are in a weight ratio of (10-15): (20-55): (10-15).
The metallocene-diene copolymer described in the application is a copolymer prepared by copolymerization under the action of a metallocene catalyst. In some preferred embodiments, the metallocene-diene copolymer operates at 40 degrees CelsiusThe dynamic viscosity is 390 to 410mm2S; further, the kinematic viscosity of the material at 100 ℃ is 30-50 mm2S; more preferably, the viscosity index is 145-155. The new material of Zhejiang Hongyu, Inc. with the code HY758 can be selected.
The kinematic viscosity is the ratio of the hydrodynamic viscosity to the fluid density rho at the same temperature, represents the physical quantity of component viscosity, and is obtained by testing according to the conventional mode in the field. The viscosity index is used herein to refer to the degree to which the viscosity of any fluid changes with temperature. The higher the viscosity index, the less temperature dependent the viscosity of the fluid and the less temperature sensitive the viscosity, as measured in a conventional manner.
The polyorganosiloxane is a polymer prepared by polymerizing organic silicon in a hydrolysis mode, an addition mode and the like. In some preferred embodiments, the polyorganosiloxane is an amino-modified polyorganosiloxane; further preferably, the amino-modified polyorganosiloxane is a secondary amino-modified organosiloxane; further preferably, the viscosity (25 ℃) of the secondary amino modified organic siloxane is 630-680 cp (preferably 650cp), wherein the viscosity refers to dynamic viscosity and can be tested in a conventional manner. The product KF880 from Suzhou Jiandao electronics, Inc. can be selected.
Because the anticorrosion grease can only adhere to the wire to achieve the anticorrosion effect on the wire, the anticorrosion effect can be improved only by ensuring the excellent adhesion of the anticorrosion grease to the wire. Applicants have found that the adhesion properties to the wire are greatly improved by controlling the base oil composition and formulation. When the metallocene diene copolymer, the polysiloxane and the cyclohexane 1, 4-diisononyl phthalate in a specific ratio are adopted, the prepared anticorrosive grease has excellent adhesion performance. Probably, because the metallocene diene copolymer structure is mainly a straight chain structure, a compact protective film can be formed on the surface of the wire under the interaction with the molecular structure of the polyorganosiloxane, so that the film formed by the anticorrosive grease has more uniform and higher polymerization strength, and the cracking between the wire and the anticorrosive grease caused by nonuniform stress is avoided when the anticorrosive grease is stimulated by external stress. Meanwhile, the lower surface tension of the polyorganosiloxane solution is beneficial to reducing the surface tension of the anticorrosion grease coated on the lead, so that the anticorrosion grease can be more uniformly and fully spread on the surface of the lead and is more fully contacted with the lead, and the adhesion performance of the anticorrosion grease to the surface of the lead is further improved. In addition, as the cyclohexane 1, 4-diisononyl phthalate has a shorter molecular chain structure, the cyclohexane 1, 4-diisononyl phthalate can be fully dispersed among the components to improve the density of the protective film, and simultaneously, other components in the system can be better dispersed, so that the permeation and full contact of the anticorrosive grease on the surface of the wire are further improved, and the adhesion performance of the anticorrosive grease is improved.
In some preferred embodiments, the base oil further comprises a pentaerythritol ester; preferably, the content ratio of the pentaerythritol ester to the polyorganosiloxane is (20-25): (20-25).
The pentaerythritol ester is POE (saturated polyol ester) formed by reacting pentaerythritol with high and low carbon fatty acids. In some embodiments, the pentaerythritol ester has a Viscosity Index (VI) of 120 to 125; further preferably, the kinematic viscosity of the pentaerythritol ester at 40 ℃ is 288-352 mm2S (preferably 320 mm)2S); more preferably, the kinematic viscosity of the rubber composition at 100 ℃ is 27-30 mm2S (preferably 29 mm)2In s). The code POE320 of Yingkou Star fire chemical Co., Ltd can be selected.
The applicant has unexpectedly found in the course of completing the present invention that not only can the adhesion property of the corrosion-resistant grease to the wire under normal temperature environment be improved by controlling the base oil component and the compounding ratio, but also the adhesion property to the wire under low temperature environment can be remarkably improved when a proper amount of pentaerythritol ester is added to the base oil component. Because pentaerythritol ester is POE (saturated polyol ester) formed by reacting pentaerythritol with high-carbon fatty acid and low-carbon fatty acid, the specific physical and chemical parameters of the POE have certain difference, the applicant finds that the kinematic viscosity of the POE at 100 ℃ is 27-30 mm2When the polyorganosiloxane used is a secondary amino-modified organosiloxane having a viscosity (25 ℃) in the range of 630 to 680cp at a low temperature in the range of sThe adhesion is good, even when the environmental temperature is as low as minus 40 ℃, the anticorrosion grease still keeps good adhesion to the wire, and the phenomena of cracking and the like do not occur. The applicant speculates that the activation energy of a large number of branched chain structures in the pentaerythritol ester molecular structure is relatively low, and the molecular chain segments can rotate and even migrate when being subjected to external stimuli, so that the external energy is consumed, the external stimuli are prevented from acting on a rigid, hard and brittle film structure in the system at a lower temperature, and certain elasticity or toughness is ensured. In addition, due to the fact that the branched chain in the pentaerythritol ester structure has a large volume, when the chain segment rotates or migrates, the change of conformation of the polymer chain segment in the system can be promoted, the membrane structure can be promoted to consume external energy in a mode of changing the conformation structure, and therefore good adhesion at low temperature can be guaranteed. Meanwhile, when the polyorganosiloxane structure contains a secondary amino structure, the polyorganosiloxane structure can be fully spread on the surface of the lead by virtue of the larger polarity, and meanwhile, the polyorganosiloxane structure can improve the acting force between the polyorganosiloxane structure and the lead, and further contributes to improving the adhesion.
The thickening agent is sodium bentonite in the application; further preferably, the sodium bentonite is modified sodium bentonite; preferably, the modified sodium bentonite is quaternary ammonium salt modified sodium bentonite, and can be made from Zhejiang Hongyu New materials GmbH, code No. HY 758.
The viscosity adjuvant described herein is used to adjust the viscosity of the preserved grease system. In some preferred embodiments, the viscosity aid is a mixture of a hydrogenated styrene-isoprene copolymer and a modified nanosilica; preferably, the content ratio of the modified nano silicon dioxide to the hydrogenated styrene-isoprene copolymer is (2-4): (3-5); further preferably, the particle size of the modified nano silicon dioxide is 10-30 nm, and a product with the code of HB-139 from Hubei Huichi Rich nano materials GmbH can be selected; the hydrogenated styrene-isoprene copolymer can be obtained from commercial sources, such as the petrochemical company of ba ling petrochemical company, ltd, code No. SEP YH-4010.
In some preferred embodiments, the film-forming agent is a methyl phenyl silicone resin, which can be selected from the chemical corporation of New Sihai, Hubei, under the code SH-3.
Because this application anticorrosive fat is used for among the overhead conductor field, except guaranteeing to have stable suitability under low environment, still guarantee to have good suitability still under higher temperature environment, avoid appearing dividing oily unstable condition because factors such as high temperature. The applicant finds that when a proper amount of hydrogenated styrene-isoprene copolymer is adopted in the system, the viscosity of base oil in the system can be regulated and controlled, the base oil component is prevented from seeping out at high temperature, and especially when small-molecular base oil which is easy to migrate, such as polypentaerythritol ester, cyclohexane 1, 4-diisononyl phthalate and the like is adopted, the unstable situations of oil seeping, oil separation and the like can be obviously improved. Probably, the longer polymer chain segment of the hydrogenated styrene-isoprene copolymer has more physical entanglement points, so that the system has higher viscosity and consistency at high temperature, the migration of the small molecular base oil is effectively hindered, and the sensitivity of the system to high-temperature factors is reduced to a certain extent by the rigid styrene structure in the structure, and the effect is better particularly when the hydrogenated styrene-isoprene copolymer is compounded with the methyl phenyl silicone resin film-forming agent for use. In addition, the applicant has also found that when a suitable amount of modified nanosilica is also included in the adjuvant and a melamine cyanurate salt is included in the filler, its stability at high temperatures can be further improved. It is presumed that the interaction between microscopic physical entanglement networks formed by the hydrogenated styrene-isoprene copolymer, the methylphenylpolysiloxane resin, and the like, further utilization of the large number of voids formed by the modified nanosilica and the flaky powder structure of the melamine cyanurate salt contributes to further adsorption of the small molecule base oil in the system and coating of the small molecule base oil in the microscopic physical entanglement networks, thereby effectively preventing the occurrence of the instability.
In some embodiments, the filler comprises a thermally conductive filler; the heat-conducting filler consists of nano aluminum oxide, boron nitride and zinc oxide; further preferably, the weight ratio of the nano aluminum oxide to the boron nitride to the zinc oxide is 2:2: 1.
Further preferably, the filler further comprises melamine cyanurate salt.
In some embodiments, the raw materials for preparing the environment-friendly anticorrosive grease further comprise other auxiliary agents such as a dispersion aid, an antioxidant and an antirust agent. The dispersion aid can be selected from various types of dispersants known to those skilled in the art, including but not limited to propylene carbonate. The antioxidant is not particularly limited in the present application, and various antioxidants known to those skilled in the art can be selected, including but not limited to, a complex amine type high temperature antioxidant, pacific union (beijing) petrochemical company ltd, code number POUPC 5002. The rust inhibitor may be selected from conventional rust inhibitors in the art, including but not limited to neutral barium dinonylnaphthalene sulfonate.
The applicant finds that when the anticorrosive grease contains a proper amount of modified sodium bentonite and a heat-conducting filler, the anti-aging performance and the anti-corrosion performance of the anticorrosive grease can be effectively improved on the premise of improving the adhesion and the applicability of the anticorrosive grease at high temperature and low temperature. Wherein the weight ratio of the nano aluminum oxide to the boron nitride to the zinc oxide is as follows: the heat conduction filler of 2:2:1 is beneficial to fully transferring heat in a system, avoids the damage of a point broken surface caused by the local action of the heat on the anti-corrosion grease protective film, and indirectly reduces the heated temperature by quickly transferring the heat, thereby avoiding the aging of the protective film. Meanwhile, under the interaction of the components such as the base oil, the film forming agent and the like, the density of the formed protective film can be better improved, and the penetration of corrosive components in the environment to the inside of the protective film is avoided, so that the aging resistance and the corrosion resistance of the protective film are favorably avoided.
The second aspect of the present invention provides a method for preparing the environment-friendly anti-corrosive grease, which comprises the following steps:
(1) according to the proportion, pumping the base oil into a grease making kettle, heating to 50-70 ℃, adding a viscosity auxiliary agent, continuously stirring, heating to 160-180 ℃, and transferring into a blending kettle;
(2) adding a film forming agent into the blending kettle, stirring for 30 minutes, cooling to 130-140 ℃, adding a thickening agent, circulating the shear for 1-3 hours, and adjusting the shearing pressure to 1.0-1.2 MPa;
(3) and then adding other auxiliary agents, continuously and circularly shearing for 0.5-2 hours, then reducing the shearing pressure to zero, adding a filler, continuously stirring and circulating for 1 hour, and then carrying out aftertreatment to obtain the modified polypropylene.
Further, the preparation method comprises the following steps:
(1) according to the proportion, 3 kinds of mixed base oil of metallocene polydiene copolymer, cyclohexane 1, 4-diisononyl phthalate and pentaerythritol ester are thrown into a grease making kettle, the temperature is raised to 60 ℃, hydrogenated styrene-isoprene copolymer is added, the mixture is continuously stirred and heated to 170 ℃, and then the mixture is transferred into a blending kettle;
(2) adding methyl phenyl silicone resin into a blending kettle, stirring for 30 minutes, softening, opening to cool, cooling to 130-140 ℃, adding modified sodium bentonite and propylene carbonate, opening a circulating shearing device after complete dispersion, adjusting the shearing pressure to 1.0-1.2 MPa, and shearing for 2 hours.
(3) Sequentially adding modified polysiloxane, a composite amine type high-temperature antioxidant and neutral barium dinonylnaphthalene sulfonate, continuously and circularly shearing for 1 hour, and then reducing the shearing pressure to zero;
(4) sequentially adding the modified nano-silica, melamine cyanurate salt and a heat-conducting filling bag, and continuously circulating for 1 hour; homogenizing, degassing, and transferring into a finished product tank.
The third aspect of the invention provides the application of the environment-friendly anti-corrosive grease, which is applied to the field of overhead conductors. The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
Examples 1 to 4
The embodiment provides an environment-friendly anticorrosive grease, which is prepared from the following raw materials in parts by weight:
base oil, thickening agent, viscosity auxiliary agent, film forming agent, filler and other auxiliary agents;
wherein the base oil comprises a metallocene diene copolymer, a polyorganosiloxane, cyclohexane 1, 4-dicarboxylic acid diisononyl ester, and pentaerythritol ester; the thickening agent is quaternary ammonium salt modified sodium bentonite; the viscosity auxiliary agent is a mixture of hydrogenated styrene-isoprene copolymer and modified nano silicon dioxide; the film-forming agent is methyl phenyl silicone resin; the filler comprises a heat-conducting filler bag and melamine cyanurate salt; the other auxiliary agents comprise a compound amine type high-temperature antioxidant, neutral dinonyl barium naphthalene sulfonate and propylene carbonate. See table 1 below for specific components thereof.
Table 1 formula table
Wherein, the modified sodium bentonite is a product of Zhejiang Hongyu New Material Co., Ltd, code No. HY 758; the metallocene polydiene copolymer is a product of DaelimSynol 40, a code number of Shanghai Kunshen chemical industry Co., Ltd; the pentaerythritol ester is a product of Yingkou starfire chemical industry Co., Ltd, and the code POE 320; the modified polyorganosiloxane is manufactured by Suzhou Jiandao electronics Co., Ltd, with the code KF 880; the hydrogenated styrene-isoprene copolymer is a product of China petrochemical barrage petrochemical company Limited with the code SEP YH-4010; the modified nano silicon dioxide is a product of Hubei Huichi Rich nano materials GmbH, code number HB-139; the composite amine type high-temperature antioxidant is a product of a Pacific United (Beijing) petrochemical industry Co., Ltd, a code number POUPC 5002; the methyl phenyl silicone resin is a product of chemical industry Co., Ltd, New Sihai, Hubei, with the code number SH-3.
The preparation method of the environment-friendly anticorrosive grease comprises the following steps:
(1) according to the proportion, 3 kinds of mixed base oil of metallocene polydiene copolymer, cyclohexane 1, 4-diisononyl phthalate and pentaerythritol ester are thrown into a grease making kettle, the temperature is raised to 60 ℃, hydrogenated styrene-isoprene copolymer is added, the mixture is continuously stirred and heated to 170 ℃, and then the mixture is transferred into a blending kettle;
(2) adding methyl phenyl silicone resin into a blending kettle, stirring for 30 minutes, softening, opening water cooling, cooling to 135 ℃, adding modified sodium bentonite and propylene carbonate, opening a circulating shearing device after complete dispersion, adjusting the shearing pressure to 1.0-1.2 MPa, and shearing for 2 hours.
(3) Sequentially adding modified polysiloxane, a composite amine type high-temperature antioxidant and neutral barium dinonylnaphthalene sulfonate, continuously and circularly shearing for 1 hour, and then reducing the shearing pressure to zero;
(4) sequentially adding the modified nano-silica, melamine cyanurate salt and a heat-conducting filling bag, and continuously circulating for 1 hour; homogenizing, degassing, and transferring into a finished product tank.
Comparative examples 1 to 4
The comparative example provides an environment-friendly anticorrosive grease, and the preparation raw materials comprise the following components:
base oil, thickening agent, viscosity auxiliary agent, film forming agent, filler and other auxiliary agents;
wherein the metallocene diene copolymer, the polyorganosiloxane, the cyclohexane 1, 4-diisononyl phthalate and the pentaerythritol ester are base oil; modified sodium bentonite is used as a thickening agent; hydrogenated styrene-isoprene copolymer and modified nano silicon dioxide are viscosity aids; the methyl phenyl silicone resin is a film forming agent; the heat-conducting filler bag and the melamine cyanurate salt belong to fillers; the composite amine type high-temperature antioxidant, neutral barium dinonyl naphthalene sulfonate, propylene carbonate and the like belong to other auxiliary agents. See table 2 below for specific components thereof.
Table 2 formula table
Wherein, the modified sodium bentonite is a product of Zhejiang Hongyu New Material Co., Ltd, code No. HY 758; the metallocene polydiene copolymer is a product of DaelimSynol 40, a code number of Shanghai Kunshen chemical industry Co., Ltd; the pentaerythritol ester is a product of Yingkou starfire chemical industry Co., Ltd, and the code POE 320; the modified polyorganosiloxane is manufactured by Suzhou Jiandao electronics Co., Ltd, with the code KF 880; the hydrogenated styrene-isoprene copolymer is a product of China petrochemical barrage petrochemical company Limited with the code SEP YH-4010; the modified nano silicon dioxide is a product of Hubei Huichi Rich nano materials GmbH, code number HB-139; the composite amine type high-temperature antioxidant is a product of a Pacific United (Beijing) petrochemical industry Co., Ltd, a code number POUPC 5002; the methyl phenyl silicone resin is a product of chemical industry Co., Ltd, New Sihai, Hubei, with the code number SH-3.
The preparation method of the environment-friendly anticorrosive grease comprises the following steps:
(1) according to the proportion, the base oil is injected into a grease making kettle, the temperature is raised to 60 ℃, the viscosity auxiliary agent is added, the stirring is continued, the temperature is raised to 170 ℃, and the base oil is transferred into a blending kettle;
(2) adding a film forming agent into the blending kettle, stirring for 30 minutes, cooling to 135 ℃, adding a thickening agent, circulating the shear for 2 hours, and adjusting the shearing pressure to 1.0-1.2 MPa;
(3) and then adding other auxiliary agents, continuously and circularly shearing for 1 hour, then reducing the shearing pressure to zero, adding a filler, continuously stirring and circularly carrying out 1 hour, and carrying out aftertreatment to obtain the composite material.
Performance testing
The applicant carried out the following performance tests on the anti-corrosive grease samples in the above examples and comparative examples, and the specific experimental items and test standards are shown in the following table 3:
TABLE 3 test items and test standards
The test results of the above experimental items are shown in the following table 4:
table 4 results of performance testing
From the experimental results, the anti-corrosion grease for the overhead conductor has a high dropping point, and has no crack under the low temperature conditions of 0 ℃ and 40 ℃ below zero for pressure oil separation, which shows that the lubricating grease provided by the invention has excellent wide-temperature applicability and meets the wide-temperature use conditions of 40 ℃ below zero and 240 ℃; the aging test data in the table show that the sample acid value change and the cone penetration change rate of the lubricating grease provided by the invention are small after long-term aging test, which shows that the lubricating grease provided by the invention has good aging resistance. As can be seen from the corrosion test data in the table, the grade of the lubricating grease provided by the invention after being tested in a corrosion environment is not lower than 8, which shows that the lubricating grease provided by the invention has good ageing resistance.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; as will be readily apparent to those skilled in the art from the disclosure herein, the present invention may be practiced without these specific details; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
