CN102199469A - Lubricating oil additive, preparation method thereof and lubricating oil containing same - Google Patents
Lubricating oil additive, preparation method thereof and lubricating oil containing same Download PDFInfo
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- CN102199469A CN102199469A CN201110096750XA CN201110096750A CN102199469A CN 102199469 A CN102199469 A CN 102199469A CN 201110096750X A CN201110096750X A CN 201110096750XA CN 201110096750 A CN201110096750 A CN 201110096750A CN 102199469 A CN102199469 A CN 102199469A
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Abstract
The invention relates to a lubricating oil additive, a preparation method thereof and lubricating oil containing the same. The lubricating oil additive has an acrylic acid series segmented copolymer structure and also has a general formula comprising at least one of (A-B)a, (A-B)b-A or (B-A)c-B, wherein A stands for a copolymer block consisting of (methyl) acrylic acid alkyl ester with alkyl with 1-3 carbon atoms; and B stands for a copolymer block consisting of (methyl) acrylic acid alkyl ester with alkyl with 4-30 carbon atoms, and the mass ratio of A to B is 1/99-40/60. Compared with the traditional acrylic acid series lubricating oil additive, the lubricating oil additive provided by the invention has good tackifying effect and can ensure that the viscosity index of the lubricating oil can be greatly improved with less addition amount, the low-temperature characteristics, the flowing characteristics and the shearing stability can be improved, the service life of the lubricating oil can be prolonged, energy resources can be saved, and the load on global environment is reduced.
Description
Technical field
The present invention relates to lubricating oil additive, especially a kind of lubricating oil additive and preparation method thereof and the lubricating oil that contains this additive.
Background technology
In recent years, in environmental protection and energy-saving field, people are devoted to study the work-ing life that how to prolong lubricating oil always, and then reduce the consumption of unit time lubricating oil, so that reach the purpose of saving the energy.Lubricating oil additive becomes the key factor that realization increases the service life, present lubricating oil additive all can not meet the demands in raising viscosity index ability, low temperature viscosity characteristic, reduction yield point ability, shear stability etc., needs further to improve various aspects of performance.With type lubricating oil additive mainly is to utilize the radical polymerization synthetic, has molecular weight distribution widely.Existing acrylic acid series lubricating oil additive is sheared the polymer chain break that causes easily, has the critical defect that reduces lubricant life, demands urgently improving.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, provide that tackify is effective, the lubricating oil additive of narrow molecular weight distribution and preparation method thereof and contain the lubricating oil of this additive, this additive can effectively improve cold property, flow characteristics and the shear stability of lubricating oil.
The present invention realizes that the technical scheme of purpose is as follows:
A kind of lubricating oil additive, structure is the acrylic acid series segmented copolymer, its general formula is (A-B) a, (A-B) b-A or (B-A) at least a among the c-B, and wherein: A represents the polymer blocks that (methyl) acrylic acid alkyl ester units by the alkyl with carbonatoms 1～3 constitutes; B represents the polymer blocks by (methyl) acrylic acid alkyl ester units formation of the alkyl with carbonatoms 4～30; A, b and c represent 1～10 integer, and its weight-average molecular weight is 9,900～990,000, number-average molecular weight is 9,800～98,000, the ratio of the total mass of the polymer blocks that the total mass of the polymer blocks that A represents and B represent counts 1/99～40/60 with the mass ratio of A/B.
And described weight-average molecular weight is 19,000～890,000, and number-average molecular weight is 18,000～580,000, and preferably molecular weight is 18,000～298,000.
And, the number-average molecular weight of the polymer blocks that described A represents, preferred 2,000～300,000, more preferably 2,000～200,000, further preferred 3,000～100,000, the number-average molecular weight of the polymer blocks that described B represents, preferred 2,000～700,000, more preferably 2,000～500,000, further preferred 3,000～200,000.
And, the mass ratio of described A/B preferred 2/98～30/70, further preferred 5/95～25/75.
And, described A specifically comprises as follows: the mixture of one or more in methyl methacrylate, Jia Jibingxisuanyizhi, isopropyl methacrylate, n propyl methacrylate, methyl acrylate, ethyl propenoate, isopropyl acrylate, the vinylformic acid n-propyl, wherein, preferably methyl methacrylate, methyl acrylate, more preferably methyl methacrylate.
And, described B specifically comprises as follows: n-BMA, Propenoic acid, 2-methyl, isobutyl ester, the secondary butyl ester of methacrylic acid, the methacrylic tert-butyl acrylate, the just own ester of methacrylic acid, cyclohexyl methacrylate, methacrylic acid 2-ethylhexyl, lauryl methacrylate, methacrylic acid bay alcohol ester, stearyl methacrylate, methacrylic acid pentadecyl ester, the methacrylic acid cetyl ester, n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, tert-butyl acrylate, the just own ester of vinylformic acid, cyclohexyl acrylate, 2-EHA, vinylformic acid bay alcohol ester, tridecyl acrylate, the stearyl acrylate alcohol ester, vinylformic acid pentadecyl ester, the mixture of one or more in the vinylformic acid cetyl ester, wherein, preferential is methacrylic acid 2-ethylhexyl, methacrylic acid bay alcohol ester, methacrylic acid tridecyl ester, 2-EHA, vinylformic acid bay alcohol ester, tridecyl acrylate, more preferably 2-EHA, vinylformic acid bay alcohol ester, tridecyl acrylate.
And, described general formula (A-B) a, the segmented copolymer that general formula (A-B) b-A and general formula (B-A) c-B represent comprises as follows: polymethylmethacrylate-b-polymethyl acrylic acid 2-ethylhexyl, polymethylmethacrylate-b-polymethyl acrylic acid bay alcohol ester, polymethylmethacrylate-positive the butyl ester of b-polyacrylic acid, polymethylmethacrylate-b-polyacrylic acid 2-ethylhexyl, polymethylmethacrylate-b-polymethyl acrylic acid 2-ethylhexyl-b-polymethylmethacrylate, polymethylmethacrylate-b-polymethyl acrylic acid bay alcohol ester-b-polymethylmethacrylate, the positive butyl ester of polymethylmethacrylate-b-polyacrylic acid-b-polymethylmethacrylate, polymethylmethacrylate-b-polyacrylic acid 2-ethylhexyl-b-polymethylmethacrylate, polymethyl acrylic acid 2-ethylhexyl-b-polymethylmethacrylate-b-polymethyl acrylic acid 2-ethylhexyl, polymethyl acrylic acid bay alcohol ester-b-polymethylmethacrylate-b-polymethyl acrylic acid bay alcohol ester, the positive butyl ester of the polyacrylic acid-b-polymethylmethacrylate-positive butyl ester of b-polyacrylic acid, polyacrylic acid 2-ethylhexyl-b-polymethylmethacrylate-b-polyacrylic acid 2-ethylhexyl.
And, the polymer blocks of described A for constituting, the polymer blocks of B for constituting by the acrylic acid alkyl ester units by the alkyl methacrylate unit.
And, in the polymer blocks that described A represents, (methyl) alkyl acrylate that contains the alkyl with carbonatoms 4～30 of the polymer blocks identical component of representing with B below 20% of mass percent in the polymer blocks, described B contain the alkyl with carbonatoms 1～3 (methyl) the acrylic ester of the polymer blocks identical component of representing with A below 20% of mass percent in the polymer blocks.
A kind of method of lubricating oil additive, method is as follows
(1) preparation initiator: on Shu Lunke type glass reaction vessel, add T-valve, with inside with nitrogen replacement after, at room temperature add toluene, 1,1,4,7,10,10-hexamethyl Triethylenetetramine (TETA), contain the toluene solution of two (2, the 6-di-t-butyl-4-methylphenoxy) aluminium of isobutyl-, further add and contain the hexanaphthene of s-butyl lithium and the mixing solutions of normal hexane;
(2) preparation multipolymer: 1. in said vesse, continue to add the copolymerization raw material A, for yellow, at room temperature stir and become colorless after 10 minutes when reaction solution begins, 2. in reaction vessel, add copolymerization raw material B, for yellow, at room temperature stir and become colorless after 20 minutes when reaction solution begins; 3. in reaction vessel, add methyl alcohol, polyreaction is stopped, the reaction solution that obtains is injected the beaker that methyl alcohol is housed, obtain throw out and be this lubricating oil additive.
A kind of lubricating oil contains above-mentioned lubricating oil additive.
Advantage of the present invention and positively effect are as follows:
1, lubricating oil additive provided by the invention is compared with acrylic acid series lubricating oil additive in the past, tackify is effective, with less addition the oil body index is greatly improved, can also improve cold property, flow characteristics and shear stability, can prolong the work-ing life of lubricating oil, save the energy, reduce the load of global environment.
2, lubricating oil additive is general formula (A-B) a among the present invention, the acrylic acid series segmented copolymer that general formula (A-B) b-A and general formula (B-A) c-B represent, in lubricating oil, change space structure according to temperature or change in concentration, under the low state of temperature, A is aggegation in lubricating oil, secondary structures such as polymer formation micellelike, viscosifying action diminishes, along with temperature rises, the aggegation of A will be removed, macromolecular chain extends and is the state of expansion, it is big that viscosifying action becomes, therefore the invention provides the temperature variant character of tackify effect of additive, prevent that effectively lubricating oil from varying with temperature the uneven problem of the viscosity that causes, and can obtain the viscosity index height, the lubricating oil that temperature-viscosity characteristics is good.
3, this additive is widely used in machine oil such as gasoline usefulness, diesel oil etc., power train oil as gear oil, manual transmission oil, differential mechanism wet goods, automatic transmission fluid such as ATF (Automatic Transmission Fluid), CVTF (ContinuouslyVariable Transmission Fluid) etc., hydraulic efficiency oil such as power steering fluid, vibroshock wet goods, and other aspects that need lubricate.
Embodiment
Below in conjunction with embodiment technology contents of the present invention is described further; Following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
The lubricating oil additive that relates among the present invention is the acrylic acid series segmented copolymer, its general formula is (A-B) a, (A-B) b-A or (B-A) at least a among the c-B, and wherein: A represents the polymer blocks that (methyl) acrylic acid alkyl ester units by the alkyl with carbonatoms 1～3 constitutes; B represents the polymer blocks by (methyl) acrylic acid alkyl ester units formation of the alkyl with carbonatoms 4～30; A, b and c represent can be identical or different 1～10 integer, its weight-average molecular weight is 9,900～990,000, preferred 19,000～890,000, number-average molecular weight is preferred 9,800～98,000, and more preferably 18,000～580,000, further preferred 18,000～298,000.The number-average molecular weight of the polymer blocks that A represents, preferred 2,000～300,000, more preferably 2,000～200,000, further preferred 3,000～100,000.In addition, the number-average molecular weight of the polymer blocks that above-mentioned B represents, preferred 2,000～700,000, more preferably 2,000～500,000, further preferred 3,000～200,000.The ratio of the total mass of the polymer blocks that the total mass of the polymer blocks that A represents and B represent is counted with the mass ratio of A/B, and is preferred 1/99～40/60, and more preferably 2/98～30/70, further preferred 5/95～25/75.When being in above-mentioned scope,, consider in lubricating oil from uniform dissolution with the aspect that just can improve viscosity index on a small quantity, be good especially.
Wherein A is as above-mentioned alkyl (methyl) alkyl acrylate with carbonatoms 1～3, specifically comprise as follows: the mixture of one or more of methyl methacrylate, Jia Jibingxisuanyizhi, isopropyl methacrylate, n propyl methacrylate, methyl acrylate, ethyl propenoate, isopropyl acrylate, vinylformic acid n-propyl etc., wherein, preferably methyl methacrylate, methyl acrylate, more preferably methyl methacrylate.
Wherein B is as above-mentioned (methyl) alkyl acrylate with alkyl of carbonatoms 4～30, specifically comprise as follows: n-BMA, Propenoic acid, 2-methyl, isobutyl ester, the secondary butyl ester of methacrylic acid, the methacrylic tert-butyl acrylate, the just own ester of methacrylic acid, cyclohexyl methacrylate, methacrylic acid 2-ethylhexyl, lauryl methacrylate, methacrylic acid bay alcohol ester, stearyl methacrylate, methacrylic acid pentadecyl ester, the methacrylic acid cetyl ester, n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, tert-butyl acrylate, the just own ester of vinylformic acid, cyclohexyl acrylate, 2-EHA, vinylformic acid bay alcohol ester, tridecyl acrylate, the stearyl acrylate alcohol ester, vinylformic acid pentadecyl ester, the mixture of one or more of vinylformic acid cetyl ester etc., wherein, preferential is methacrylic acid 2-ethylhexyl, methacrylic acid bay alcohol ester, methacrylic acid tridecyl ester, 2-EHA, vinylformic acid bay alcohol ester, tridecyl acrylate, more preferably 2-EHA, vinylformic acid bay alcohol ester, tridecyl acrylate.
General formula (A-B) a, the segmented copolymer that general formula (A-B) b-A and general formula (B-A) c-B represent specifically comprises as follows: polymethylmethacrylate-b-polymethyl acrylic acid 2-ethylhexyl, polymethylmethacrylate-b-polymethyl acrylic acid bay alcohol ester, polymethylmethacrylate-positive the butyl ester of b-polyacrylic acid, polymethylmethacrylate-b-polyacrylic acid 2-ethylhexyl, polymethylmethacrylate-b-polymethyl acrylic acid 2-ethylhexyl-b-polymethylmethacrylate, polymethylmethacrylate-b-polymethyl acrylic acid bay alcohol ester-b-polymethylmethacrylate, the positive butyl ester of polymethylmethacrylate-b-polyacrylic acid-b-polymethylmethacrylate, polymethylmethacrylate-b-polyacrylic acid 2-ethylhexyl-b-polymethylmethacrylate, polymethyl acrylic acid 2-ethylhexyl-b-polymethylmethacrylate-b-polymethyl acrylic acid 2-ethylhexyl, polymethyl acrylic acid bay alcohol ester-b-polymethylmethacrylate-b-polymethyl acrylic acid bay alcohol ester, the positive butyl ester of the polyacrylic acid-b-polymethylmethacrylate-positive butyl ester of b-polyacrylic acid, polyacrylic acid 2-ethylhexyl-b-polymethylmethacrylate-b-polyacrylic acid 2-ethylhexyl.
Wherein, the polymer blocks of representing as above-mentioned A is the polymer blocks that is made of the alkyl methacrylate unit, the polymer blocks that B represents is during for the polymer blocks that is made of the acrylic acid alkyl ester units, and the shear stability of adding to when using in the lubricating oil is good, is preferred therefore.In the polymer blocks that above-mentioned A represents, also can contain (methyl) alkyl acrylate of the alkyl with carbonatoms 4～30 of the polymer blocks identical component of representing with B below 20% of mass percent in the polymer blocks.
In addition, in the polymer blocks that above-mentioned B represents, also can contain the alkyl with carbonatoms 1～3 (methyl) the acrylic ester of the polymer blocks identical component of representing with A below 20% of mass percent in the polymer blocks.
Further, the acrylic acid series segmented copolymer that the present invention uses can also contain (methyl) vinylformic acid such as methacrylic acid below 20% of mass percent in the polymer blocks, vinylformic acid; Methacrylic acid 2-methoxy ethyl ester, methacrylic acid 2-(2-methoxy ethoxy) ethyl ester, vinylformic acid 2-methoxy ethyl ester, vinylformic acid 2-(2-methoxy ethoxy) ethyl ester etc. have (methyl) acrylate of ether structure; Methacrylic acid 2-(dimethylamino) ethyl ester, vinylformic acid 2-(dimethylamino) ethyl ester etc. have (methyl) acrylate of amine structure; Methacrylic acid 2-(4-morpholinyl) ethyl ester, vinylformic acid 2-(4-morpholinyl) ethyl ester etc. have (methyl) acrylate of ether structure and amine structure etc.Wherein, consider the dispersion of sludge.Suitable use has above-mentioned ether structure (methyl) acrylate, have (methyl) acrylate of above-mentioned amine structure and have (methyl) acrylate of above-mentioned ether structure and amine structure.
(methyl) acrylic acid alkyl ester units of its formation preferably is chosen as, make the oleophobic property of the polymer blocks that the A of acrylic acid series segmented copolymer represents be higher than the polymer blocks that B represents, on the other hand, the lipophilicity of the polymer blocks represented of B is higher than the polymer blocks that A represents.By having such structure, can improve solvability, even a small amount of interpolation also has high tackify effect to lubricating oil.
In addition, with above-mentioned general formula (A-B) a, the segmented copolymer that general formula (A-B) b-A and general formula (B-A) c-B represent, in lubricating oil, according to temperature or concentration, oleophobic property block A meeting aggegation, under the low state of temperature, A is aggegation in lubricating oil, secondary structures such as polymer formation micellelike, viscosifying action diminishes, along with temperature rises, the aggegation of A will be removed, macromolecular chain extension and be the state of expansion, it is big that viscosifying action becomes, the temperature variant character of tackify effect of polymkeric substance can prevent that oil body from descending with temperature change according to the present invention, can obtain the viscosity index height, the lubricating oil composition that temperature-viscosity characteristics is good.
Preparation embodiment 1
Preparation process lubricant oil additive of the present invention is as follows: (present embodiment is that example describes with polymethylmethacrylate-b-polymethyl acrylic acid lauryl alcohol)
(1) preparation initiator: on 100ml Shu Lunke (schlenk) type glass reaction vessel, add T-valve, with inside with nitrogen replacement after, at room temperature add toluene 43.3g, 1,1,4,7,10,10-hexamethyl Triethylenetetramine (TETA) 0.066g (0.286mmol), contain the toluene solution 1.06g of two (2,6-di-t-butyl-4-methylphenoxy) the aluminium 0.708mmol of isobutyl-, further add and contain the hexanaphthene of s-butyl lithium 0.237mmol and the mixing solutions 0.14g of normal hexane;
(2) preparation multipolymer: 1. in said vesse, continue to add methyl methacrylate 1.73g, for yellow, at room temperature stir and become colorless after 10 minutes when reaction solution begins, at this moment, reaction solution 0.5g is collected in the sampling container that small amount of methanol is housed, be used for analyzing.The GC measurement result of this reaction solution is that the transformation efficiency of methyl methacrylate is 100%; 2. in reaction vessel, add methacrylic acid bay alcohol ester 11.6g.For yellow, at room temperature stir and become colorless after 20 minutes when reaction solution begins; 3. in reaction vessel, add methyl alcohol 0.5g, polyreaction is stopped.The GC measurement result of this reaction solution is that the transformation efficiency of methacrylic acid bay alcohol ester is 100%.The reaction solution that obtains is injected the beaker that 500ml methyl alcohol is housed, obtain throw out.It in 60 ℃ of vacuum-dryings 24 hours, is obtained pie polymkeric substance 13.3g.With it as polymer A 1.
The reaction solution and the polymer A 1 of gathering in the reaction process are carried out
1H-NMR measures and GPC measures, and the result shows that the polymer A 1 that finally obtains is, the Synthetic rubber, isoprene-styrene, hydrogenated, block, diblock of polymethyl methyl esters-b-polymethyl acrylic acid bay alcohol ester, the Mn of its methyl methacrylate block part is 7,810, Mw is 8,890, and Mw/Mn is 1.14, in addition, the Mn of Synthetic rubber, isoprene-styrene, hydrogenated, block, diblock is 4,6700, Mw is 51,000, Mw/Mn is 1.09, and the ratio of each block is polymethylmethacrylate (14.4 quality %)-b-polymethyl acrylic acid lauryl alcohol (85.6 quality %).
A kind of lubricating oil contains above-mentioned lubricating oil additive.
Claims (10)
1. lubricating oil additive, it is characterized in that: structure is the acrylic acid series segmented copolymer, its general formula is (A-B) a, (A-B) b-A or (B-A) at least a among the c-B, and wherein: A represents the polymer blocks that (methyl) acrylic acid alkyl ester units by the alkyl with carbonatoms 1～3 constitutes; B represents the polymer blocks by (methyl) acrylic acid alkyl ester units formation of the alkyl with carbonatoms 4～30; A, b and c represent 1～10 integer, and its weight-average molecular weight is 9,900～990,000, number-average molecular weight is 9,800～98,000, the ratio of the total mass of the polymer blocks that the total mass of the polymer blocks that A represents and B represent counts 1/99～40/60 with the mass ratio of A/B.
2. lubricating oil additive according to claim 1 is characterized in that: described weight-average molecular weight is 19,000～890,000, and number-average molecular weight is 18,000～580,000, and preferably molecular weight is 18,000～298,000.
3. lubricating oil additive according to claim 1 and 2 is characterized in that: the number-average molecular weight of the polymer blocks that described A represents, preferred 2,000～300,000, more preferably 2,000～200,000, further preferred 3,000～100,000, the number-average molecular weight of the polymer blocks that described B represents, preferred 2,000～700,000, more preferably 2,000～500,000, further preferred 3,000～200,000, the mass ratio of described A/B preferred 2/98～30/70, further preferred 5/95～25/75.
4. lubricating oil additive according to claim 1, it is characterized in that: described A specifically comprises as follows: the mixture of one or more in methyl methacrylate, Jia Jibingxisuanyizhi, isopropyl methacrylate, n propyl methacrylate, methyl acrylate, ethyl propenoate, isopropyl acrylate, the vinylformic acid n-propyl, wherein, preferably methyl methacrylate, methyl acrylate, more preferably methyl methacrylate.
5. lubricating oil additive according to claim 1, it is characterized in that: described B specifically comprises as follows: n-BMA, Propenoic acid, 2-methyl, isobutyl ester, the secondary butyl ester of methacrylic acid, the methacrylic tert-butyl acrylate, the just own ester of methacrylic acid, cyclohexyl methacrylate, methacrylic acid 2-ethylhexyl, lauryl methacrylate, methacrylic acid bay alcohol ester, stearyl methacrylate, methacrylic acid pentadecyl ester, the methacrylic acid cetyl ester, n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, tert-butyl acrylate, the just own ester of vinylformic acid, cyclohexyl acrylate, 2-EHA, vinylformic acid bay alcohol ester, tridecyl acrylate, the stearyl acrylate alcohol ester, vinylformic acid pentadecyl ester, the mixture of one or more in the vinylformic acid cetyl ester, wherein, preferential is methacrylic acid 2-ethylhexyl, methacrylic acid bay alcohol ester, methacrylic acid tridecyl ester, 2-EHA, vinylformic acid bay alcohol ester, tridecyl acrylate, more preferably 2-EHA, vinylformic acid bay alcohol ester, tridecyl acrylate.
6. lubricating oil additive according to claim 1, it is characterized in that: described general formula (A-B) a, the segmented copolymer that general formula (A-B) b-A and general formula (B-A) c-B represent comprises as follows: polymethylmethacrylate-b-polymethyl acrylic acid 2-ethylhexyl, polymethylmethacrylate-b-polymethyl acrylic acid bay alcohol ester, polymethylmethacrylate-positive the butyl ester of b-polyacrylic acid, polymethylmethacrylate-b-polyacrylic acid 2-ethylhexyl, polymethylmethacrylate-b-polymethyl acrylic acid 2-ethylhexyl-b-polymethylmethacrylate, polymethylmethacrylate-b-polymethyl acrylic acid bay alcohol ester-b-polymethylmethacrylate, the positive butyl ester of polymethylmethacrylate-b-polyacrylic acid-b-polymethylmethacrylate, polymethylmethacrylate-b-polyacrylic acid 2-ethylhexyl-b-polymethylmethacrylate, polymethyl acrylic acid 2-ethylhexyl-b-polymethylmethacrylate-b-polymethyl acrylic acid 2-ethylhexyl, polymethyl acrylic acid bay alcohol ester-b-polymethylmethacrylate-b-polymethyl acrylic acid bay alcohol ester, the positive butyl ester of the polyacrylic acid-b-polymethylmethacrylate-positive butyl ester of b-polyacrylic acid, polyacrylic acid 2-ethylhexyl-b-polymethylmethacrylate-b-polyacrylic acid 2-ethylhexyl.
7. lubricating oil additive according to claim 1 is characterized in that: the polymer blocks of described A for being made of the alkyl methacrylate unit, the polymer blocks of B for being made of the acrylic acid alkyl ester units.
8. lubricating oil additive according to claim 1, it is characterized in that: in the polymer blocks that described A represents, (methyl) alkyl acrylate that contains the alkyl with carbonatoms 4～30 of the polymer blocks identical component of representing with B below 20% of mass percent in the polymer blocks, described B contain the alkyl with carbonatoms 1～3 (methyl) the acrylic ester of the polymer blocks identical component of representing with A below 20% of mass percent in the polymer blocks.
9. method for preparing as one of claim 1-8 described lubricating oil additive, it is characterized in that: method is as follows
(1) preparation initiator: on Shu Lunke type glass reaction vessel, add T-valve, with inside with nitrogen replacement after, at room temperature add toluene, 1,1,4,7,10,10-hexamethyl Triethylenetetramine (TETA), contain the toluene solution of two (2, the 6-di-t-butyl-4-methylphenoxy) aluminium of isobutyl-, further add and contain the hexanaphthene of s-butyl lithium and the mixing solutions of normal hexane;
(2) preparation multipolymer: 1. in said vesse, continue to add the copolymerization raw material A, for yellow, at room temperature stir and become colorless after 10 minutes when reaction solution begins, 2. in reaction vessel, add copolymerization raw material B, for yellow, at room temperature stir and become colorless after 20 minutes when reaction solution begins; 3. in reaction vessel, add methyl alcohol, polyreaction is stopped, the reaction solution that obtains is injected the beaker that methyl alcohol is housed, obtain throw out and be this lubricating oil additive.
10. a lubricating oil is characterized in that: contain the arbitrary described lubricating oil additive of claim 1-8.
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Application publication date: 20110928 |