US20020103089A1 - Lubricant composition for steel filament and rubber-steel filament composite body - Google Patents
Lubricant composition for steel filament and rubber-steel filament composite body Download PDFInfo
- Publication number
- US20020103089A1 US20020103089A1 US09/893,691 US89369101A US2002103089A1 US 20020103089 A1 US20020103089 A1 US 20020103089A1 US 89369101 A US89369101 A US 89369101A US 2002103089 A1 US2002103089 A1 US 2002103089A1
- Authority
- US
- United States
- Prior art keywords
- group
- lubricant composition
- carbon number
- cobalt
- composition according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 0 *1N=Cc2ccccc2O[Co]Oc2ccccc2C=N1.C/N=C/c1ccccc1O[Co]Oc1ccccc1/C=N/C Chemical compound *1N=Cc2ccccc2O[Co]Oc2ccccc2C=N1.C/N=C/c1ccccc1O[Co]Oc1ccccc1/C=N/C 0.000 description 14
- YRURXQFYBGMLLC-UHFFFAOYSA-M BO[Co]OC(C)=O.C Chemical compound BO[Co]OC(C)=O.C YRURXQFYBGMLLC-UHFFFAOYSA-M 0.000 description 3
- YYBKPQSBGQVPKX-UHFFFAOYSA-M CC(=O)O[Mo] Chemical compound CC(=O)O[Mo] YYBKPQSBGQVPKX-UHFFFAOYSA-M 0.000 description 1
- UJXPLOVCTIYERD-UHFFFAOYSA-N CC1=O[Co]2(OC(C)C1)OC(C)CC(C)=O2 Chemical compound CC1=O[Co]2(OC(C)C1)OC(C)CC(C)=O2 UJXPLOVCTIYERD-UHFFFAOYSA-N 0.000 description 1
- GOEUCEIWCWFKHF-UHFFFAOYSA-N CN(C)C(=S)SSCSSC(=S)N(C)C Chemical compound CN(C)C(=S)SSCSSC(=S)N(C)C GOEUCEIWCWFKHF-UHFFFAOYSA-N 0.000 description 1
- CAUQQTUWZQNXNK-UHFFFAOYSA-M COS(=O)(=O)SCCCCCCSS(=O)(=O)O[Na] Chemical compound COS(=O)(=O)SCCCCCCSS(=O)(=O)O[Na] CAUQQTUWZQNXNK-UHFFFAOYSA-M 0.000 description 1
- KVKRHXUMVRRWGI-UHFFFAOYSA-N [H]OC(=O)CCCCCCCCC(CCCCCCCC)S(=S=S)C(CCCCCCCC)CCCCCCCCC(=O)O[H] Chemical compound [H]OC(=O)CCCCCCCCC(CCCCCCCC)S(=S=S)C(CCCCCCCC)CCCCCCCCC(=O)O[H] KVKRHXUMVRRWGI-UHFFFAOYSA-N 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0606—Reinforcing cords for rubber or plastic articles
- D07B1/0666—Reinforcing cords for rubber or plastic articles the wires being characterised by an anti-corrosive or adhesion promoting coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
- B21C9/02—Selection of compositions therefor
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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
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/10—Metal oxides, hydroxides, carbonates or bicarbonates
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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
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/12—Metal carbonyls
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- C—CHEMISTRY; METALLURGY
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/18—Compounds containing halogen
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/26—Compounds containing silicon or boron, e.g. silica, sand
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- C—CHEMISTRY; METALLURGY
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M127/00—Lubricating compositions characterised by the additive being a non- macromolecular hydrocarbon
- C10M127/02—Lubricating compositions characterised by the additive being a non- macromolecular hydrocarbon well-defined aliphatic
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- C—CHEMISTRY; METALLURGY
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- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/26—Carboxylic acids; Salts thereof
- C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M129/38—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms
- C10M129/40—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms monocarboxylic
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- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/68—Esters
- C10M129/70—Esters of monocarboxylic acids
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- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/38—Heterocyclic nitrogen compounds
- C10M133/44—Five-membered ring containing nitrogen and carbon only
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- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
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- C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
- C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
- C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
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- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/20—Thiols; Sulfides; Polysulfides
- C10M135/22—Thiols; Sulfides; Polysulfides containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
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- C10M135/20—Thiols; Sulfides; Polysulfides
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- C10M135/26—Thiols; Sulfides; Polysulfides containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing carboxyl groups; Derivatives thereof
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- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/32—Heterocyclic sulfur, selenium or tellurium compounds
- C10M135/36—Heterocyclic sulfur, selenium or tellurium compounds the ring containing sulfur and carbon with nitrogen or oxygen
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- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/10—Thio derivatives
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- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/12—Reaction products
- C10M159/18—Complexes with metals
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- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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- C10M2201/02—Water
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- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/015—Dispersions of solid lubricants
- C10N2050/02—Dispersions of solid lubricants dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2080/00—Special pretreatment of the material to be lubricated, e.g. phosphatising or chromatising of a metal
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3085—Alloys, i.e. non ferrous
- D07B2205/3089—Brass, i.e. copper (Cu) and zinc (Zn) alloys
Definitions
- This invention relates to a lubricant composition used in a drawing treatment of a steel filament constituting a steel cord for the reinforcement of rubber articles, a steel filament treated with such a lubricant composition, and a rubber-steel filament composite body using such a treated steel filament.
- steel cords have been used as a reinforcing member for rubber articles such as tires for automobiles, hoses, conveyor belts and the like.
- a surface of a steel filament constituting the cord is subjected to a brass plating.
- the corrosion resistance, adhesion stability, wet adhesion property, thermoresistance adhesion property and the like are not sufficiently improved only by a simple brass plating.
- the inventor has examined various substances to be added to the lubricant composition used in the drawing step of the steel filament and found that steel filaments having an excellent adhesion property to rubber are obtained by adding a compound(s) as mentioned later to the lubricant composition as a lubricant component and treating the steel filament with such a composition and as a result the invention has been accomplished.
- a lubricant composition for steel filament comprising at least one compound selected from the group consisting of sodium 1,6-hexamethylenediamine-dithiosulfate dihydrate, a compound represented by the following formula (1):
- A is an alkylene group having a carbon number of 2-10, and each of R 1 and R 2 is a monovalent organic group containing at least one nitrogen atom
- R 5 is an alkyl group having a carbon number of 1-20, a phenyl alkyl group or an alkyl phenyl group provided that a carbon number of the alkyl group is 1-10
- a cobalt complex represented by the following formula (5):
- R 6 is an alkyl group having a carbon number of 1-20 or a —NHR 7 group or a —OR 7 group in which R 7 is an alkyl group having a carbon number of 1-20
- R 8 is an alkyl group having a carbon number of 1-20 and Z is an oxygen atom or a sulfur atom provided that Zs are the same or partly different
- R 9 or R 10 is a hydrocarbon residue having a carbon number of 1-20 and Z is an oxygen atom or a sulfur atom provided that Zs are the same or partly different
- R 11 is an alkyl group having a carbon number of 1-20.
- a lubricant composition for steel filament comprising at least one compound represented by the following formula (12):
- R 12 , R 13 , R 14 and R 15 are independently an alkyl group having a carbon number of 1-20, a cycloalkyl group having a carbon number of 3-20, a monovalent aromatic ring-containing group having a carbon number of 3-20 and, if necessary, containing at least one heteroatom selected from the group consisting of an oxygen atom, nitrogen atom and sulfur atom provided that at least one of R 12 , R 13 , R 14 and R 15 contains at least one of carboxyl group and/or ester compound thereof in its molecule, and x is an integer of 1 to 5).
- the invention is concerned with a steel filament having a layer of the above lubricant composition on its surface and a rubber-steel filament composite body comprising the thus treated steel filament and a rubber composition.
- the drawing of the steel filament is carried out by a usual wet drawing process using a wet-type drawing machine.
- the steel filament is drawn to a given filament diameter by passing through a die attached to a lubrication tank in the drawing machine.
- the steel filament use may be made of a bare steel filament, a copper plated steel filament, a brass plated steel filament, a nickel plated steel filament and the like.
- the steel filament is treated with a lubricant composition in the lubrication tank to form a layer of the lubricant composition on the surface of the steel filament.
- the lubricant composition is so-called emulsion-formed by dispersing a high-pressure preventive, an oiling agent, an emulsifying agent, a foam controlling agent and so on in a solvent. These agents used can properly be selected form those usually used in the wet drawing.
- the lubricant composition used in the invention is characterized by compounding at least one of the compounds as defined above as a lubricant component. The details of these compounds will be described below.
- HTS 1,6-hexamethylenediamine-dithiosulfate dihydrate
- HTS is radically cleaved by heat to form.
- S—(CH 2 ) 6 —S. which reacts with a surface of a metal and a double bond in a polymer Therefore, when the steel filament is drawn in the HTS-containing lubricant composition, a layer of such a lubricant composition is formed on the surface of the steel filament.
- a preferable amount of HTS compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- the alkylene group represented by symbol A may be a straight chain, a branched chain or a cyclic structure, and it is preferably a straight chain alkylene group.
- the straight chain alkylene group mention may be made of ethylene group, trimethylene group, tetramethylene group, pentamethylene group, hexamethylene group, heptamethylene group, octamethylene group, decamethylene group and the like. Among them, hexamethylene group is preferable from a viewpoint of the effect.
- a nitrogen-containing monovalent organic group containing at least one aromatic ring or a nitrogen-containing monovalent organic group having a group of bonding a carbon atom to a dithio group or a ⁇ N—C( ⁇ S)— group is preferable as the organic group represented by symbol R 1 , R 2 .
- R 1 and R 2 may be the same or different, but it is favorable that they are the same from a viewpoint of production easiness or the like.
- each of R 16 to R 19 is an alkyl group, an aryl group or an aralkyl group, provided that at least one of R 16 and R 17 and at least one of R 18 and R 19 are an aryl group having a carbon number of 6-20 or an aralkyl group having a carbon number of 7-20, and n is an integer of 2 to 10).
- the alkyl group in the formula (13) is favorable to have a carbon number of 1-20 and includes methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, various pentyl groups, various hexyl groups, various octyl groups, various decyl groups, various dodecyl groups, various tetradecyl groups, various hexadecyl groups, various octadecyl groups, cyclopentyl group, cyclohexyl group, cyclooctyl group and so on.
- the aryl group in the formula (13) is favorable to have a carbon number of 6-20 and may have a proper substituent such as lower alkyl group or the like.
- a proper substituent such as lower alkyl group or the like.
- the aryl group mention may be made of phenyl group, tolyl group, xylyl group, naphthyl group, methylnaphthyl group and so on.
- the aralkyl group in the formula (13) is favorable to have a carbon number of 7-20 and may have a proper substituent such as lower alkyl group or the like.
- aralkyl group mention may be made of benzyl group, methylbenzyl group, dimethylbenzyl group, phenetyl group, methylphenetyl group, dimethylphenetyl group, naphthylmethyl group, (methylnaphthyl)methyl group, (dimethylnaphthyl)methyl group, naphthylethyl group, (methylnaphthyl)ethyl group, (dimethylnaphthyl)ethyl group and so on.
- R 16 to R 19 are the above aryl group or aralkyl group. Particularly, they are preferable to be benzyl group from a viewpoint of prevention of heat aging, production easiness and the like.
- the compound of the formula (1) causes the cutting of crosslink for the rubber composition on the surface of the steel filament at a high temperature but also efficiently produces monosulfide crosslink having a higher heat-resistant stability as compared with polysulfide crosslink.
- a preferable amount of the compound of the formula (1) compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- the monoalkali metal salt of triazine thiol is represented by the following formula (14):
- M is an alkali metal selected from lithium, sodium and potassium
- a di- or a tri-alkali metal salt of triazine thiol is high in the hygroscopicity (or deliquescence) to chemicals and degrades the adhesion property, particularly initial adhesion property, so that the use of such a compound is unfavorable.
- a preferable amount of the monoalkali metal salt of triazine thiol compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- the monoalkali metal salt of triazine thiol may be used together with boric acid or boric ester because boric acid or boric ester forms a film by reacting with the surface of the metal and blocks a corrosion factor to develop a rust prevention and improve a waterproof adhesion property.
- the boric ester there are (CH 3 O) 3 B, (CH 3 CH 2 CH 2 O) 3 B, (CH 3 —(CH 2 ) 8 —O) 3 B, (CH 3 —(CH 2 ) 9 —O) 3 B and so on.
- the carbon number of the boric ester is favorable to be a range of 9-12.
- a preferable amount of boric acid or boric ester compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- the thiadiazole compound includes thiadiazole, dimercaptothiadiazoles and monosubstituted bodies thereof. Since the thiadiazole compound has —SH group in its molecule, it reacts with a surface of a metal and a double bond of a polymer to adhere them to each other. As the dimercaptothiadiazole, 2,5-dimercapto-1,3,4-thiadiazole is favorable. As the monosubstituted body, there are sodium salt, potassium salt, lithium salt, ammonium salt and zinc salt of the dimercaptothiadiazole. A preferable amount of the thiadiazole compound compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- bivalent or trivalent cobalt salt of the inorganic acid hydrochloric acid, sulfuric acid, nitric acid and carbonic acid are used as the inorganic acid.
- X is preferable to be ethylene group or -propylene-NH-propylene-.
- X is preferable to be N,N-disalycylarl- ⁇ , ⁇ ′-diaminopropylamine cobalt (II).
- cobalt alcoholate of the formula (4) cobalt oleyl alcoholate, cobalt palmityl alcoholate, cobalt stearyl alcohol ate and cobalt nonylphenyl alcoholate are preferable.
- R 7 is preferable to be methyl group, ethyl group, propyl group, benzyl group or phenyl group.
- R 7 is preferable to be methyl group, ethyl group, propyl group, benzyl group or phenyl group.
- cobalt acetylacetonate (II) cobalt acetylacetonate (III) and cobalt acetoanilide (II).
- the monocarboxylic acid constituting the acid residue Y in the formulae (6) and (7) mention may be made of acetic acid, propionic acid, butyric acid, valeric acid, pivalic acid (trimethylacetic acid), n-heptanoic acid, 2,2-dimethyl pentanoic acid, 2-ethyl pentanoic acid, 4,4-dimethyl pentanoic acid, n-octanoic acid, 2,2-dimethyl hexanoic acid, 2-ethyl hexanoic acid, 4,4-dimethyl hexanoic acid, 2,4,4-trimethyl pentanoic acid, n-nonanoic acid, 2,2-dimethyl heptanoic acid, 6,6-dimethyl heptanoic acid, 3,5,5-trimethyl hexanoic acid, n-decanoic acid, 2,2-dimethyl octanoic acid, 7,7-di
- the acid residue is preferable to have a carbon number of 9-12.
- aromatic group-containing monocarboxylic acid in the formulae (6) and (7), mention may be made of phenylacetic acid, toluic acid, methylbenzenecarboxylic acid, 3-phenylpropionic acid, 2-phenylpropionic acid, tolylacetic acid, 4-ethylbenzoic acid, 2,4,6-trimethylbenzoic acid, 4-isopropylbenzoic acid, 3-pyridylacetic acid and so on.
- R 8 is preferable to be an alkyl group having a carbon number of 8-13 for providing excellent lubricity and workability.
- a ratio of sulfur atom/oxygen atom in all of Xs is particularly favorable to be 1/3-3/1 considering the lubricity and corrosion resistance.
- cobalt salt of dithiocarbamate is preferable cobalt bis(diethyldithiocarbamate).
- cobalt salt of dithiocarbonate is preferable cobalt bis(o-ethyldithiocarbonate).
- the hydrocarbon residue of R 9 or R 10 may be a straight chain, a branched chain or a cyclic structure and be aliphatic, alicyclic or aromatic, and may contain at least one element selected from nitrogen, oxygen and sulfur in its molecule.
- the hydrocarbon residue there are mentioned an alkyl group, an alkenyl group, an aromatic ring-containing group, a cycloalkyl group and a cycloalkenyl group.
- alkyl group mention may be made of methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, t-butyl group, pentyl group, isopentyl group, neopentyl group, t-pentyl group, hexyl group, heptyl group, octyl group, 2-ethylhexyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, isotridecyl group, myristyl group, palmityl group, stearyl group, icosyl group, docosyl group, tetracosyl group, triacontyl group, 2-octyldodecyl group, 2-dodecylhexadecyl group, 2-tetradecyloctadecyl group, monomethyl group, 2-oct
- alkenyl group mention may be made of vinyl group, allyl group, propenyl group, isopropenyl group, butenyl group, isobutenyl group, pentenyl group, isopentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, tetradecenyl group, oleyl group and so on.
- aromatic ring-containing group mention may be made of phenyl group, toluyl group, xylyl group, cumenyl group, mesityl group, benzyl group, phentyl group, styryl group, cinnamyl group, benzhydryl group, tolythyl group, ethylphenyl group, propylphenyl group, butylphenyl group, pentylphenyl group, hexylphenyl group, heptylphenyl group, octylphenyl group, nonylphenyl group, decylphenyl group, undecylphenyl group, dodecylphenyl group, styrenated phenyl group, cumylphenyl group, ⁇ -naphthyl group, ⁇ -naphthyl group, furyl group, propyl group, pyridyl group and
- cycloalkyl group mention may be made of cyclopentyl group, cyclohexyl group, cycloheptyl group, methylcyclopentyl group, methylcyclohexyl group, methylcycloheptyl group and so on.
- cycloalkenyl group mention may be made of cyclopentenyl group, cyclohexenyl group, cycloheptenyl group, methylcyclopentenyl group, methylcyclohexenyl group, methylcycloheptenyl group and so on.
- alkyl groups having a carbon number of 8-20 such as octyl group, 2-ethylhexyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, isotridecyl group, myristyl group, palmityl group, stearyl group and the like are favorable.
- primary alkyl group having a carbon number of 10-14 such as decyl group, undecyl group, dodecyl group, tridecyl group, isotridecyl group and myristyl group are preferable because they are small in the bad odor, high in the decomposition temperature and good in the lubricity.
- the preferable amount of each of the compounds used as a lubricant component as defined above is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- molybdenum salt of the formula (11) mention may be made of molybdenum plamitate, molybdenum behenate, molybdenum stearate, molybdenum palmitolate, molybdenum oleate, molybdenum linolate and so on.
- alkyl group in R 12 , R 13 , R 14 , R 15 of the formula (12) mention may be made of methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, t-butyl group, various pentyl groups, various hexyl groups, various octyl groups, various decyl groups, various dodecyl groups, various tetradecyl groups, various hexadecyl groups, various octadecyl groups and so on.
- cycloalkyl group in R 12 , R 13 , R 14 , R 15 of the formula (12) mention may be made of cyclopropyl group, cyclobutyl group, various methylcyclopentyl groups, various dimethylcyclopentyl groups, various ethylcyclopentyl groups, various diethylcyclopentyl groups, various propylcyclopentyl groups, various butylcyclopentyl groups, various pentylcyclopentyl groups, cycloohexyl group, various methylcyclohexyl groups, various dimethylcyclohexyl groups, various ethylcyclohexyl groups, various diethylcyclohexyl groups, various propylcyclohexyl groups, various butylcyclohexyl groups, cyclooctyl group, various methylcyclooctyl groups, various ethylcyclooctyl groups, various di
- R 12 , R 13 , R 14 , R 15 of the formula (12) mention may be made of phenyl group, tolyl group, ethylphenyl group, xylyl group, benzyl group, naphthyl group, methylnaphthyl group, furyl group, pyrolyl group, pyridyl group and so on.
- R 12 , R 14 and x are the same as in the formula (12), and R 20 , R 22 are independently an alkylene group having a carbon number of 1-19, a cycloalkylene group having a carbon number of 3-19 or a bivalent aromatic ling-containing group having a carbon number of 3-19, direct bond, and R 21 , R 23 are independently hydrogen atom, methyl group or ethyl group).
- alkylene group in R 20 , R 22 of the formula (15) mention may be made of ethylene group, trimethylene group, tetramethylene group, pentamethylene group, hexamethylene group, heptamethylene group, octamethylene group, decamethylene group, dodecamethylene group, tetradecamethylene group, hexadecamethylene group, octadecamethylene group and so on.
- cycloalkylene group in R 20 , R 22 of the formula (15) mention may be made of cyclopropylene group, various cyclobutylene groups, various cyclopentylene groups, various methylcyclopentylene groups, various dimethylcyclopentylene groups, various ethylcyclopentylene groups, various diethylcyclopentylene groups, various propylcyclopentylene groups, various butylcyclopentylene groups, various cyclohexylene groups, various methylcyclohexylene groups, various dimethylcyclohexylene groups, various propylcyclohexylene groups, various octylene groups, various methylcyclooctylene groups and so on.
- R 20 , R 22 of the formula (15) mention may be made of various phenylene groups, various xylylene groups, various naphthylene groups and so on.
- the compound of the formula (12) efficiently produces a monosulfide crosslink having a higher heat-resistant stability than polysulfide crosslink on the surface of the steel filament in parallel to the crosslink scission to the rubber composition at a higher temperature. Therefore, the preferable amount of the compound of the formula (12) is within a range of 10-100 g per 1000 g of the lubricant composition.
- the surface of the steel filament is treated with the lubricant composition of the above construction during the drawing in the wet drawing machine to form a layer of the lubricant composition, particularly a coating layer of the compound according to the invention as the lubricating component in the lubricant composition.
- a coating layer of the compound according to the invention as the lubricating component in the lubricant composition.
- the thus treated steel filament is used as a monofilament cord or as a steel cord formed by twisting a plurality of these treated steel filaments.
- a non-treated steel filament may be used as a part of steel filaments, but the desired effects becomes large when all are treated steel filaments.
- a cord is used as a reinforcing member for rubber articles, it is coated with a coating rubber to form a rubber-steel filament composite body.
- the coating rubber is not particularly restricted and can use a rubber composition usually used in the art. According to the invention, the coating layer of the lubricant component is existent at an interface between the steel filament and rubber in the composite body for strongly adhering them to each other.
- the rubber-steel filament composite body according to the invention is used as a reinforcing member for rubber articles, since the adhesion property between rubber and steel filament is excellent, there is caused no peeling of the steel filament from rubber and the durability of the rubber article is considerably improved.
- a lubricant composition and a rubber composition are prepared according to a compounding recipe shown in Tables 1 to 4.
- a steel filament subjected to a brass plating Cu: 63 wt %, Zn: 37 wt %) is drawn to a filament diameter of 0.25 mm by passing through the above lubricant composition in a wet drawing machine.
- the thus treated steel filaments are used to form a steel cord (1 ⁇ 5 construction).
- the thus obtained steel cords are arranged side by side at an interval of 12.5 mm and sandwiched with two rubber sheets made of the above rubber composition to prepare a sample of a rubber-cord composite body.
- the sample is cured at 160° C. for 20 minutes and further subjected to a heat aging treatment at 60° C. for 10 minutes to measure a tensile strength of rubber.
- the measured results are shown in Tables 1 to 4 by an index on the basis that control is 100, wherein the larger the index value, the higher the strength.
- Comparative Example 1 is set to be the control for initial adhesion property and tensile strength after heat aging.
- Example 2 3 4
- Example 3 5 6
- Lubricant composition (parts by weight) ethylenediamine phosphate 4 4 4 4 4 4 4 4 oleic triethanolate 8 8 8 8 8 8 8 8 8 8 laurylamine octaethylene glycol 4 4 4 4 4 4 4 4 4 octadecane 3 3 3 3 3 3 3 3 3 3 3 3 3 octylic tetraethylene glycol 2 2 2 2 2 2 2 2 2 2 2 2 2 2 methyl p-oxybenzoate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 methyl benzotriazole 1 1 1 1 1 1 1 1 1 HTS 5 5 5 KA9188 5 5 5 ion-exchange
- Comparative Example 4 is set to be the control for initial adhesion property and tensile strength after heat aging.
- Example 5 Example 6 13
- Lubricant composition (parts by weight) ethylenediamine phosphate 4 4 4 4 4 4 4 4 4 oleic triethanolate 8 8 8 8 8 8 8 8 8 laurylamine octaethylene glycol 4 4 4 4 4 4 4 4 4 4 4 octadecane 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 octylic tetraethylene glycol 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 methyl p-oxybenzoate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 methyl benzotriazole 1 1 1 1 1 1 1 1 1 1 1 lithium tri
- Comparative Example 7 is set to be the control for initial adhesion property and tensile strength after heat aging.
- Example 9 20
- Lubricant composition (parts by weight) ethylenediamine phosphate 4 4 4 4 4 4 4 4 4 oleic triethanolate 8 8 8 8 8 8 8 8 8 laurylanune octaethylene glycol 4 4 4 4 4 4 4 4 4 4 4 octadecane 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 octylic tetraethylene glycol 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 methyl p-oxybenzoate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 methyl benzotriazole 1 1 1 1 1 1 1 1 1 1 1 1 thiadia
- Comparative Example 10 is set to be the control for initial adhesion property and tensile strength after heat aging.
- Comparative Example 10 is set to be the control for initial adhesion property and tensile strength after heat aging.
- TABLE 4 Compar- Compar- ative ative Exam- Example Example Example Example Example Example Example Example Example Example Example Example Example Example Example Example Example Example Example Example Example ple 10 21 22 23 24 25 26 11 27 28 29 30 31 32 33 34 Lubricant composition (parts by weight) ethylenediamine phosphate 4 4 4 4 4 4 4 4 4 4 4 4 4 4 oleic triethanolate 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 laurylamine octaethylene 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 glycol octadecane 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 octylic tetraethylene glycol 2 2 2
- a steel filament subjected to a brass plating (Cu: 63 wt %, Zn: 37 wt %) is drawn to a filament diameter of 0.25 mm by passing at a drawing rate of 800 m/min through the lubricant composition in a wet drawing machine.
- the lubricant composition contains basic components as shown in Tables 5 and 6.
- HTS is chosen as an example of the lubricating compound of the first aspect of the invention.
- filament temperature means a temperature of steel filament just after passing through the final die. As the temperature becomes higher, the heat generation becomes larger.
- the diameter of the steel filament just after passing through the final die is measured to compare the filament diameter before and after the drawing of 50000 m.
- the measured results are shown in Tables 5 and 6, in which difference of filament diameter before and after the drawing is indicated as an increment of filament diameter. As the increment of filament diameter becomes small, better lubricity is maintained.
- steel filaments having an excellent adhesion property to rubber are obtained by compounding the compound(s) defined in the invention with the lubricant composition and surface-treating the steel filaments therewith during the drawing. And also, when the rubber-steel filament composite body using the thus treated steel filaments is used as a reinforcing member for the rubber article, it is possible to reduce the cobalt salt of the organic acid and hence the durability of the rubber article can largely be improved without damaging the adhesion property.
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Abstract
A lubricant composition for a surface treatment of a steel filament comprises at least one specified compound as a lubricant component and a rubber-steel filament composite body is prepared by using a steel filament treated with the lubricant composition.
Description
- 1. Field of the Invention
- This invention relates to a lubricant composition used in a drawing treatment of a steel filament constituting a steel cord for the reinforcement of rubber articles, a steel filament treated with such a lubricant composition, and a rubber-steel filament composite body using such a treated steel filament.
- 2. Description of Related Art
- Heretofore, steel cords have been used as a reinforcing member for rubber articles such as tires for automobiles, hoses, conveyor belts and the like. In order to adhere such a cord to rubber, a surface of a steel filament constituting the cord is subjected to a brass plating. However, the corrosion resistance, adhesion stability, wet adhesion property, thermoresistance adhesion property and the like are not sufficiently improved only by a simple brass plating.
- In order to solve this problem, there are proposed various methods. As one of these methods, there is a method of treating a surface of a steel filament with a lubricant composition at a drawing step of the filament. For instance, the surface treatment with a lubricant composition containing a triazine thiol derivative is disclosed in JP-A-5-185136, JP-A-6-341073 and the like. However, the adhesion property to rubber is not yet sufficient even in the thus surface-treated steel filament.
- On the other hand, there is a method of using a rubber composition compounded with a cobalt salt of an organic acid having an adhesion promoting action in rubber as a coating rubber for the steel filament. However; the cobalt salt of the organic acid indicates a high adhesion force just after vulcanization, but has a drawback of degrading rubber properties in heat aging.
- It is, therefore, an object of the invention to solve the aforementioned problems and to provide a lubricant composition useful in the drawing treatment of the steel filament and a rubber-steel filament composite body using such a treated steel filament.
- It is another object of the invention to provide an emulsion type lubricant composition useful for wet drawing having a higher heat resistance.
- The inventor has examined various substances to be added to the lubricant composition used in the drawing step of the steel filament and found that steel filaments having an excellent adhesion property to rubber are obtained by adding a compound(s) as mentioned later to the lubricant composition as a lubricant component and treating the steel filament with such a composition and as a result the invention has been accomplished.
- According to a first aspect of the invention, there is the provision of a lubricant composition for steel filament comprising at least one compound selected from the group consisting of sodium 1,6-hexamethylenediamine-dithiosulfate dihydrate, a compound represented by the following formula (1):
- R1—S—S—A—S—S—R2 (1)
-
- (wherein R3 is an alkyl group having a carbon number of 1 -10and X is —R4— or —R4—NH—R4— in which R4 is an alkylene group having a carbon number of 1 to 10), a cobalt alcholate represented by the following formula (4):
- (R5—O—)2—Co (4)
-
- (wherein R6 is an alkyl group having a carbon number of 1-20 or a —NHR7 group or a —OR7 group in which R7 is an alkyl group having a carbon number of 1-20), a metal borate derivative represented by the following formula (6):
- BO—M—Y)3 (6)
- (wherein M is Co or Ni and Y is an acid residue of a monocarboxylic acid having a carbon number of 2-21 or an aromatic group containing monocarboxylic acid having a carbon number of 2-21 provided that Ys are the same or different), a metal aluminate derivative represented by the following formula (7):
- A1O—M—Y)3 (7)
- (wherein M is Co or Ni and Y is an acid residue of a monocarboxylic acid having a carbon number of 2-21 or an aromatic group containing monocarboxylic acid having a carbon number of 2-21 provided that Ys are the same or different), a cobalt, nickel or iron salt of dithiocarbamate or dithiocarbonate, a cobalt dithiocarbamate represented by the following formula (8):
-
-
- (wherein R11 is an alkyl group having a carbon number of 1-20).
-
- (wherein R12, R13, R14 and R15 are independently an alkyl group having a carbon number of 1-20, a cycloalkyl group having a carbon number of 3-20, a monovalent aromatic ring-containing group having a carbon number of 3-20 and, if necessary, containing at least one heteroatom selected from the group consisting of an oxygen atom, nitrogen atom and sulfur atom provided that at least one of R12, R13, R14 and R15 contains at least one of carboxyl group and/or ester compound thereof in its molecule, and x is an integer of 1 to 5).
- Further, the invention is concerned with a steel filament having a layer of the above lubricant composition on its surface and a rubber-steel filament composite body comprising the thus treated steel filament and a rubber composition.
- The invention will be described in detail below. In the invention, the drawing of the steel filament is carried out by a usual wet drawing process using a wet-type drawing machine. In this case, the steel filament is drawn to a given filament diameter by passing through a die attached to a lubrication tank in the drawing machine. As the steel filament, use may be made of a bare steel filament, a copper plated steel filament, a brass plated steel filament, a nickel plated steel filament and the like. During the drawing, the steel filament is treated with a lubricant composition in the lubrication tank to form a layer of the lubricant composition on the surface of the steel filament.
- The lubricant composition is so-called emulsion-formed by dispersing a high-pressure preventive, an oiling agent, an emulsifying agent, a foam controlling agent and so on in a solvent. These agents used can properly be selected form those usually used in the wet drawing. In addition to these agent, the lubricant composition used in the invention is characterized by compounding at least one of the compounds as defined above as a lubricant component. The details of these compounds will be described below.
-
- HTS is radically cleaved by heat to form. S—(CH2)6—S., which reacts with a surface of a metal and a double bond in a polymer Therefore, when the steel filament is drawn in the HTS-containing lubricant composition, a layer of such a lubricant composition is formed on the surface of the steel filament. A preferable amount of HTS compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- In the compound of the formula (1), the alkylene group represented by symbol A may be a straight chain, a branched chain or a cyclic structure, and it is preferably a straight chain alkylene group. As an example of the straight chain alkylene group, mention may be made of ethylene group, trimethylene group, tetramethylene group, pentamethylene group, hexamethylene group, heptamethylene group, octamethylene group, decamethylene group and the like. Among them, hexamethylene group is preferable from a viewpoint of the effect.
- In the formula (1), a nitrogen-containing monovalent organic group containing at least one aromatic ring or a nitrogen-containing monovalent organic group having a group of bonding a carbon atom to a dithio group or a ═N—C(═S)— group is preferable as the organic group represented by symbol R1, R2. Moreover, R1 and R2 may be the same or different, but it is favorable that they are the same from a viewpoint of production easiness or the like.
- As the compound of the formula (1), α, ω-bis(N, N′-dihydro-carbylthiocarbamoyldithio) alkane represented by the following formula (13):
-
- (wherein each of R16 to R19 is an alkyl group, an aryl group or an aralkyl group, provided that at least one of R16 and R17 and at least one of R18 and R19 are an aryl group having a carbon number of 6-20 or an aralkyl group having a carbon number of 7-20, and n is an integer of 2 to 10).
- The alkyl group in the formula (13) is favorable to have a carbon number of 1-20 and includes methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, various pentyl groups, various hexyl groups, various octyl groups, various decyl groups, various dodecyl groups, various tetradecyl groups, various hexadecyl groups, various octadecyl groups, cyclopentyl group, cyclohexyl group, cyclooctyl group and so on.
- The aryl group in the formula (13) is favorable to have a carbon number of 6-20 and may have a proper substituent such as lower alkyl group or the like. As the aryl group, mention may be made of phenyl group, tolyl group, xylyl group, naphthyl group, methylnaphthyl group and so on.
- The aralkyl group in the formula (13) is favorable to have a carbon number of 7-20 and may have a proper substituent such as lower alkyl group or the like. As the aralkyl group, mention may be made of benzyl group, methylbenzyl group, dimethylbenzyl group, phenetyl group, methylphenetyl group, dimethylphenetyl group, naphthylmethyl group, (methylnaphthyl)methyl group, (dimethylnaphthyl)methyl group, naphthylethyl group, (methylnaphthyl)ethyl group, (dimethylnaphthyl)ethyl group and so on.
- In the formula (13), it is favorable that all of R16 to R19 are the above aryl group or aralkyl group. Particularly, they are preferable to be benzyl group from a viewpoint of prevention of heat aging, production easiness and the like. As an example of such compounds, there are 1,2-bis(N, N′-dibenzylthiocarbamoyldithio)ethane, 1,3-bis(N, N′-dibenzylthiocarbamoyldithio)propane, 1,4-bis(N, N′-dibenzylthiocarbamoyldithio)butane, 1,5-bis(N, N′-dibenzylthiocarbamoyldithio)pentane, 1,6-bis(N, N′-dibenzylthiocarbamoyldithio)hexane, 1,7-bis(N, N′-dibenzylthiocarbamoyldithio)heptane, 1,8-bis(N, N′-dibenzylthiocarbamoyldithio)octane, 1,9-bis(N, N′-dibenzylthiocarbamoyldithio)nonane, 1,10-bis(N, N′-dibenzylthiocarbamoyldithio)decane and so on. Among them, 1,6-bis(N, N′-dibenzylthiocarbamoyldithio)hexane (hereinafter abbreviated as KA9188) is preferable from a viewpoint of the effect.
- The compound of the formula (1) causes the cutting of crosslink for the rubber composition on the surface of the steel filament at a high temperature but also efficiently produces monosulfide crosslink having a higher heat-resistant stability as compared with polysulfide crosslink. A preferable amount of the compound of the formula (1) compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
-
- (wherein M is an alkali metal selected from lithium, sodium and potassium) and reacts with a surface of a metal and a double bond of a polymer to adhere them to each other.
- On the contrary, a di- or a tri-alkali metal salt of triazine thiol is high in the hygroscopicity (or deliquescence) to chemicals and degrades the adhesion property, particularly initial adhesion property, so that the use of such a compound is unfavorable.
- A preferable amount of the monoalkali metal salt of triazine thiol compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- And also, the monoalkali metal salt of triazine thiol may be used together with boric acid or boric ester because boric acid or boric ester forms a film by reacting with the surface of the metal and blocks a corrosion factor to develop a rust prevention and improve a waterproof adhesion property. As the boric ester, there are (CH3O)3B, (CH3CH2CH2O)3B, (CH3—(CH2)8—O)3B, (CH3—(CH2)9—O)3B and so on. Moreover, the carbon number of the boric ester is favorable to be a range of 9-12. A preferable amount of boric acid or boric ester compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- The thiadiazole compound includes thiadiazole, dimercaptothiadiazoles and monosubstituted bodies thereof. Since the thiadiazole compound has —SH group in its molecule, it reacts with a surface of a metal and a double bond of a polymer to adhere them to each other. As the dimercaptothiadiazole, 2,5-dimercapto-1,3,4-thiadiazole is favorable. As the monosubstituted body, there are sodium salt, potassium salt, lithium salt, ammonium salt and zinc salt of the dimercaptothiadiazole. A preferable amount of the thiadiazole compound compounded is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- In the bivalent or trivalent cobalt salt of the inorganic acid, hydrochloric acid, sulfuric acid, nitric acid and carbonic acid are used as the inorganic acid.
- As the Schiff base complex of the formula (2), N, N′-disalicylideneethylenediamine is preferable.
- In the Schiff base complex of the formula (3), X is preferable to be ethylene group or -propylene-NH-propylene-. For example, there is N,N-disalycylarl-γ,γ′-diaminopropylamine cobalt (II).
- As the cobalt alcoholate of the formula (4), cobalt oleyl alcoholate, cobalt palmityl alcoholate, cobalt stearyl alcohol ate and cobalt nonylphenyl alcoholate are preferable.
- In the cobalt complex of the formula (5), R7 is preferable to be methyl group, ethyl group, propyl group, benzyl group or phenyl group. For example, there are cobalt acetylacetonate (II), cobalt acetylacetonate (III) and cobalt acetoanilide (II).
- As the monocarboxylic acid constituting the acid residue Y in the formulae (6) and (7), mention may be made of acetic acid, propionic acid, butyric acid, valeric acid, pivalic acid (trimethylacetic acid), n-heptanoic acid, 2,2-dimethyl pentanoic acid, 2-ethyl pentanoic acid, 4,4-dimethyl pentanoic acid, n-octanoic acid, 2,2-dimethyl hexanoic acid, 2-ethyl hexanoic acid, 4,4-dimethyl hexanoic acid, 2,4,4-trimethyl pentanoic acid, n-nonanoic acid, 2,2-dimethyl heptanoic acid, 6,6-dimethyl heptanoic acid, 3,5,5-trimethyl hexanoic acid, n-decanoic acid, 2,2-dimethyl octanoic acid, 7,7-dimethyl octanoic acid, n-undecanoic acid, Versatic 10 (trade name, made by Shell International Co., Ltd. synthetic mixture mainly composed of neodecanoic acid), lauric acid, tridecanoic acid, myristic acid, pentadecanoic acid, palmitolic acid, palmitic acid, heptadecanoic acid, linoleic acid, linolenic acid, oleic acid, stearic acid, arachidonic acid and so on. The acid residue is preferable to have a carbon number of 9-12.
- As the aromatic group-containing monocarboxylic acid in the formulae (6) and (7), mention may be made of phenylacetic acid, toluic acid, methylbenzenecarboxylic acid, 3-phenylpropionic acid, 2-phenylpropionic acid, tolylacetic acid, 4-ethylbenzoic acid, 2,4,6-trimethylbenzoic acid, 4-isopropylbenzoic acid, 3-pyridylacetic acid and so on.
-
- In the formula (8), R8 is preferable to be an alkyl group having a carbon number of 8-13 for providing excellent lubricity and workability.
- In the formulae (8) and (9), a ratio of sulfur atom/oxygen atom in all of Xs is particularly favorable to be 1/3-3/1 considering the lubricity and corrosion resistance.
- As the cobalt salt of dithiocarbamate is preferable cobalt bis(diethyldithiocarbamate).
- As the cobalt salt of dithiocarbonate is preferable cobalt bis(o-ethyldithiocarbonate).
- In the formulae (9) and (10), the hydrocarbon residue of R9 or R10 may be a straight chain, a branched chain or a cyclic structure and be aliphatic, alicyclic or aromatic, and may contain at least one element selected from nitrogen, oxygen and sulfur in its molecule. As the hydrocarbon residue, there are mentioned an alkyl group, an alkenyl group, an aromatic ring-containing group, a cycloalkyl group and a cycloalkenyl group.
- As the alkyl group, mention may be made of methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, t-butyl group, pentyl group, isopentyl group, neopentyl group, t-pentyl group, hexyl group, heptyl group, octyl group, 2-ethylhexyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, isotridecyl group, myristyl group, palmityl group, stearyl group, icosyl group, docosyl group, tetracosyl group, triacontyl group, 2-octyldodecyl group, 2-dodecylhexadecyl group, 2-tetradecyloctadecyl group, monomethyl branched isostearyl group and so on.
- As the alkenyl group, mention may be made of vinyl group, allyl group, propenyl group, isopropenyl group, butenyl group, isobutenyl group, pentenyl group, isopentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, tetradecenyl group, oleyl group and so on.
- As the aromatic ring-containing group, mention may be made of phenyl group, toluyl group, xylyl group, cumenyl group, mesityl group, benzyl group, phentyl group, styryl group, cinnamyl group, benzhydryl group, tolythyl group, ethylphenyl group, propylphenyl group, butylphenyl group, pentylphenyl group, hexylphenyl group, heptylphenyl group, octylphenyl group, nonylphenyl group, decylphenyl group, undecylphenyl group, dodecylphenyl group, styrenated phenyl group, cumylphenyl group, α-naphthyl group, β-naphthyl group, furyl group, propyl group, pyridyl group and so on.
- As the cycloalkyl group, mention may be made of cyclopentyl group, cyclohexyl group, cycloheptyl group, methylcyclopentyl group, methylcyclohexyl group, methylcycloheptyl group and so on.
- As the cycloalkenyl group, mention may be made of cyclopentenyl group, cyclohexenyl group, cycloheptenyl group, methylcyclopentenyl group, methylcyclohexenyl group, methylcycloheptenyl group and so on.
- Among the aforementioned hydrocarbon residues, alkyl groups having a carbon number of 8-20 such as octyl group, 2-ethylhexyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, isotridecyl group, myristyl group, palmityl group, stearyl group and the like are favorable. Particularly, primary alkyl group having a carbon number of 10-14 such as decyl group, undecyl group, dodecyl group, tridecyl group, isotridecyl group and myristyl group are preferable because they are small in the bad odor, high in the decomposition temperature and good in the lubricity.
- In any case, the preferable amount of each of the compounds used as a lubricant component as defined above is 1-40 parts by weight based on 100 parts by weight of the lubricant composition.
- As the molybdenum salt of the formula (11), mention may be made of molybdenum plamitate, molybdenum behenate, molybdenum stearate, molybdenum palmitolate, molybdenum oleate, molybdenum linolate and so on.
- As the alkyl group in R12, R13, R14, R15 of the formula (12), mention may be made of methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, t-butyl group, various pentyl groups, various hexyl groups, various octyl groups, various decyl groups, various dodecyl groups, various tetradecyl groups, various hexadecyl groups, various octadecyl groups and so on.
- As the cycloalkyl group in R12, R13, R14, R15 of the formula (12), mention may be made of cyclopropyl group, cyclobutyl group, various methylcyclopentyl groups, various dimethylcyclopentyl groups, various ethylcyclopentyl groups, various diethylcyclopentyl groups, various propylcyclopentyl groups, various butylcyclopentyl groups, various pentylcyclopentyl groups, cycloohexyl group, various methylcyclohexyl groups, various dimethylcyclohexyl groups, various ethylcyclohexyl groups, various diethylcyclohexyl groups, various propylcyclohexyl groups, various butylcyclohexyl groups, cyclooctyl group, various methylcyclooctyl groups, various ethylcyclooctyl groups, various dimethylcyclooctyl groups and so on.
- As the monovalent aromatic ring-containing group in R12, R13, R14, R15 of the formula (12), mention may be made of phenyl group, tolyl group, ethylphenyl group, xylyl group, benzyl group, naphthyl group, methylnaphthyl group, furyl group, pyrolyl group, pyridyl group and so on.
-
- (wherein R12, R14 and x are the same as in the formula (12), and R20, R22 are independently an alkylene group having a carbon number of 1-19, a cycloalkylene group having a carbon number of 3-19 or a bivalent aromatic ling-containing group having a carbon number of 3-19, direct bond, and R21, R23 are independently hydrogen atom, methyl group or ethyl group).
- As the alkylene group in R20, R22 of the formula (15), mention may be made of ethylene group, trimethylene group, tetramethylene group, pentamethylene group, hexamethylene group, heptamethylene group, octamethylene group, decamethylene group, dodecamethylene group, tetradecamethylene group, hexadecamethylene group, octadecamethylene group and so on.
- As the cycloalkylene group in R20, R22 of the formula (15), mention may be made of cyclopropylene group, various cyclobutylene groups, various cyclopentylene groups, various methylcyclopentylene groups, various dimethylcyclopentylene groups, various ethylcyclopentylene groups, various diethylcyclopentylene groups, various propylcyclopentylene groups, various butylcyclopentylene groups, various cyclohexylene groups, various methylcyclohexylene groups, various dimethylcyclohexylene groups, various propylcyclohexylene groups, various octylene groups, various methylcyclooctylene groups and so on.
- As the bivalent aromatic ling-containing group in R20, R22 of the formula (15), mention may be made of various phenylene groups, various xylylene groups, various naphthylene groups and so on.
- As an example of the compounds represented by the formula (15), there are mentioned various thiodidecanoic acids, various thiodidodecanoic acids, various thioditetradecanoic acids, various thiodihexadecanoic acids, various thiodioctadecanoic acids, various thiodiicosanoic acids, various dithiodidecanoic acids, various dithiodidodecanoic acids, various dithioditetradecanoic acids, various dithiodihexadecanoic acids, various dithiodioctadecanoic acids, various dithiodiicosanoic acids, various trithiodidecanolic acids, various trithiodihexadecanolic acids, various trithiodioctadecanoic acids, various trithiodiicosanoic acids, various tetrathiodidecanoic acids, various tetrathiodidodecanoic acids, various tetrathioditetradecanoic acids, various tetrathiodihexadecanoic acids, various tetrathiodioctadecanoic acids, various tetrathiodiicosanoic acids, various pentathiodidecanoic acids, various pentathiodidodecanoic acids, various pentathioditetradecanoic acids, various pentathiodihexadecanoic acids, various pentathiodioctadecanoic acids, various pentathiodiicosanoic acids, methyl esters and ethyl esters thereof and so on.
- Among the compounds of the formula (15), it is particularly preferable to use compounds wherein the carbon number in each of R12 and R14 is 6-10, and the carbon number in each of R20 and R22 is 5-9, and each of R21 and R23 is hydrogen and x is 2-4.
- The compound of the formula (12) efficiently produces a monosulfide crosslink having a higher heat-resistant stability than polysulfide crosslink on the surface of the steel filament in parallel to the crosslink scission to the rubber composition at a higher temperature. Therefore, the preferable amount of the compound of the formula (12) is within a range of 10-100 g per 1000 g of the lubricant composition.
- According to the invention, the surface of the steel filament is treated with the lubricant composition of the above construction during the drawing in the wet drawing machine to form a layer of the lubricant composition, particularly a coating layer of the compound according to the invention as the lubricating component in the lubricant composition. Although the mechanism of forming such a coating layer is not clear, it is guessed as follows. That is, as the steel filament passes through the lubricant composition, the lubricating component in the lubricant composition is adsorbed on the surface of the steel filament. When the steel filament is drawn by passing through the die in the wet drawing machine at such a state, the lubricating component is strongly adhered to the surface of the steel filament to form the coating layer.
- Particularly, when the steel filament is drawn at a drawing rate of not less than 700 m/min in the wet drawing machine, an interface between the steel filament and the die becomes a high temperature and high pressure state. In the invention, when the compound of the formula (12) is particularly used as a lubricating component in the lubricant composition, a higher lubrication effect can be maintained at such a state to prevent the baking of a plated portion of the steel filament onto the die. And also, as the steel filament is drawn at a very high drawing rate, there can be obtained a drawn steel filament having a high tensile strength of, for example, not less than 4000 MPa.
- The thus treated steel filament is used as a monofilament cord or as a steel cord formed by twisting a plurality of these treated steel filaments. In the steel cord, a non-treated steel filament may be used as a part of steel filaments, but the desired effects becomes large when all are treated steel filaments. When such a cord is used as a reinforcing member for rubber articles, it is coated with a coating rubber to form a rubber-steel filament composite body. The coating rubber is not particularly restricted and can use a rubber composition usually used in the art. According to the invention, the coating layer of the lubricant component is existent at an interface between the steel filament and rubber in the composite body for strongly adhering them to each other.
- As the rubber-steel filament composite body according to the invention is used as a reinforcing member for rubber articles, since the adhesion property between rubber and steel filament is excellent, there is caused no peeling of the steel filament from rubber and the durability of the rubber article is considerably improved.
- The following examples are given in illustration of the invention and are not intended as limitations thereof.
- A lubricant composition and a rubber composition are prepared according to a compounding recipe shown in Tables 1 to 4. At first, a steel filament subjected to a brass plating (Cu: 63 wt %, Zn: 37 wt %) is drawn to a filament diameter of 0.25 mm by passing through the above lubricant composition in a wet drawing machine. The thus treated steel filaments are used to form a steel cord (1×5 construction). The thus obtained steel cords are arranged side by side at an interval of 12.5 mm and sandwiched with two rubber sheets made of the above rubber composition to prepare a sample of a rubber-cord composite body.
- After the sample is cured at 160° C. for 10 minutes, the steel cord is pulled out according to ASTM D-2229 to measure a pulling force. The measured results are shown in Tables 1 to 4 as an initial adhesion property by an index on the basis that control is 100, wherein the larger the index value, the stronger the adhesion force and the better the initial adhesion property.
- Then, the sample is cured at 160° C. for 20 minutes and further subjected to a heat aging treatment at 60° C. for 10 minutes to measure a tensile strength of rubber. The measured results are shown in Tables 1 to 4 by an index on the basis that control is 100, wherein the larger the index value, the higher the strength.
- Various experiments are carried out by using HTS or KA9188 as a lubricating component. In this case, Comparative Example 1 is set to be the control for initial adhesion property and tensile strength after heat aging.
TABLE 1 Compar- Compar- Compar- ative Example Example ative Example Example ative Example Example Example 1 2 Example 2 3 4 Example 3 5 6 Lubricant composition (parts by weight) ethylenediamine phosphate 4 4 4 4 4 4 4 4 4 oleic triethanolate 8 8 8 8 8 8 8 8 8 laurylamine octaethylene glycol 4 4 4 4 4 4 4 4 4 octadecane 3 3 3 3 3 3 3 3 3 octylic tetraethylene glycol 2 2 2 2 2 2 2 2 2 methyl p-oxybenzoate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 methyl benzotriazole 1 1 1 1 1 1 1 1 1 HTS 5 5 5 KA9188 5 5 5 ion-exchanged water 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 Rubber composition (parts by weight) natural rubber 100 100 100 100 100 100 100 100 100 carbon black HAF 50 50 50 50 50 50 50 50 50 zinc oxide 5 5 5 5 5 5 5 5 5 antioxidant (6C) *1 2 2 2 2 2 2 2 2 2 cobalt naphthenate 2 2 2 1 1 1 0 0 0 vulcanization accelerator (DZ) *2 1 1 1 1 1 1 1 1 1 sulfur 5 5 5 5 5 5 5 5 5 Initial adhesion property (index) 100 110 115 85 100 100 70 85 85 Tensile strength after heat aging (index) 100 100 100 110 110 110 115 115 115 - Various experiments are carried out by using a triazine thiol as a lubricating component. In this case, Comparative Example 4 is set to be the control for initial adhesion property and tensile strength after heat aging.
TABLE 2 Compar- Compar- Compar- Ex- ative Example Example Example Example Example ative Example ative ample Example 4 7 8 9 10 11 Example 5 12 Example 6 13 Lubricant composition (parts by weight) ethylenediamine phosphate 4 4 4 4 4 4 4 4 4 4 oleic triethanolate 8 8 8 8 8 8 8 8 8 8 laurylamine octaethylene glycol 4 4 4 4 4 4 4 4 4 4 octadecane 3 3 3 3 3 3 3 3 3 3 octylic tetraethylene glycol 2 2 2 2 2 2 2 2 2 2 methyl p-oxybenzoate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 methyl benzotriazole 1 1 1 1 1 1 1 1 1 1 lithium triazine thiol 5 5 5 5 5 sodium triazine thiol 5 potassium triazine thiol 5 boric acid 3 3 3 trimethoxy borane 3 ion-exchanged water 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 Rubber composition (parts by weight) natural rubber 100 100 100 100 100 100 100 100 100 100 carbon black HAF 50 50 50 50 50 50 50 50 50 50 zinc oxide 5 5 5 5 5 5 5 5 5 5 antioxidant (6C) *1 2 2 2 2 2 2 2 2 2 2 cobalt naphthenate 2 2 2 2 2 2 1 1 0 0 vulcanization accelerator 1 1 1 1 1 1 1 1 1 1 (DZ) *2 sulfur 5 5 5 5 5 5 5 5 5 5 Initial adhesion property (index) 100 110 110 105 115 115 90 100 80 90 Tensile strength after heat aging 100 100 100 100 100 100 110 110 120 120 (index) - Various experiments are carried out by using a thiaziazole as a lubricating component. In this case, Comparative Example 7 is set to be the control for initial adhesion property and tensile strength after heat aging.
TABLE 3 Compar- Compar- Compar- Ex- ative Example Example Example Example Example ative Example ative ample Example 7 14 15 16 17 18 Example 8 19 Example 9 20 Lubricant composition (parts by weight) ethylenediamine phosphate 4 4 4 4 4 4 4 4 4 4 oleic triethanolate 8 8 8 8 8 8 8 8 8 8 laurylanune octaethylene glycol 4 4 4 4 4 4 4 4 4 4 octadecane 3 3 3 3 3 3 3 3 3 3 octylic tetraethylene glycol 2 2 2 2 2 2 2 2 2 2 methyl p-oxybenzoate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 methyl benzotriazole 1 1 1 1 1 1 1 1 1 1 thiadiazole 5 5 5 sodium thiadiazole 5 potassium thiadiazole 5 thiadiazole dichloroamine 5 zinc thiadiazole 5 ion-exchanged water 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 Rubber composition (parts by weight) natural rubber 100 100 100 100 100 100 100 100 100 100 carbon black HAF 50 50 50 50 50 50 50 50 50 50 zinc oxide 5 5 5 5 5 5 5 5 antioxidant (6C) *1 2 2 2 2 2 2 2 2 2 2 cobalt naphthenate 1 1 1 1 1 1 0.5 0.5 0 0 vulcanization accelerator 1 1 1 1 1 1 1 1 1 1 (DZ) *2 sulfur 5 5 5 5 5 5 5 5 5 5 Initial adhesion property (index) 100 115 110 110 115 110 90 100 85 95 Tensile strength after heat aging 100 100 100 100 100 100 110 110 120 120 (index) - Various experiment are carried out by using a cobalt compound as a lubricating component. In this case, Comparative Example 10 is set to be the control for initial adhesion property and tensile strength after heat aging.
TABLE 4 Compar- Compar- ative ative Exam- Example Example Example Example Example Example Example Example Example Example Example Example Example Example Example ple 10 21 22 23 24 25 26 11 27 28 29 30 31 32 33 34 Lubricant composition (parts by weight) ethylenediamine phosphate 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 oleic triethanolate 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 laurylamine octaethylene 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 glycol octadecane 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 octylic tetraethylene glycol 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 methyl p-oxybenzoate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 methyl benzotriazole 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 chlorinated Co (II) 8 8 cobalt N,N′-disalycylidene 26.5 26.5 ethylene diamine cobalt stearyl alcholate 23 23 cobalt acetoanilide (II) 35 35 cobalt borate derivative *1 12.6 12.6 cobalt bis(diethyl- 31.9 31.9 dithiocarbonate) (II) cobalt dithiophosphate 30 30 ion-exchanged water 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 77.5 Rubber composition (parts by weight) natural rubber 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 carbon black HAF 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 zinc oxide 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 antioxidant (6C) *2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 cobalt naphthenate 2 2 2 2 2 2 2 0 2 0 0 0 0 0 0 0 vulcanization accelerator 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 (DZ) *3 sulfur 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Initial adhesion property 100 110 110 110 110 110 110 85 110 100 100 100 100 100 100 100 (index) Tensile strength after heat 100 105 105 105 105 105 105 110 105 110 110 110 110 110 110 110 aging (index) -
- In this case, a steel filament subjected to a brass plating (Cu: 63 wt %, Zn: 37 wt %) is drawn to a filament diameter of 0.25 mm by passing at a drawing rate of 800 m/min through the lubricant composition in a wet drawing machine. In addition to the compound A, the lubricant composition contains basic components as shown in Tables 5 and 6. In Table 6, HTS is chosen as an example of the lubricating compound of the first aspect of the invention.
- The temperature of the steel filament just after the pass through a final die is measured for the evaluation of heat generation to obtain results as shown in Tables 5 and 6. In these tables, the term “filament temperature” means a temperature of steel filament just after passing through the final die. As the temperature becomes higher, the heat generation becomes larger.
- The diameter of the steel filament just after passing through the final die is measured to compare the filament diameter before and after the drawing of 50000 m. The measured results are shown in Tables 5 and 6, in which difference of filament diameter before and after the drawing is indicated as an increment of filament diameter. As the increment of filament diameter becomes small, better lubricity is maintained.
TABLE 5 Com- Com- Conven- parative parative tional Exam- Exam- Exam- Exam- Exam- Example ple ple ple ple ple 1 35 36 37 12 13 Lubricant composition (part by weight) Ethylene- 4 4 2 1 2 1 diamine phosphate Triethanol 8 8 8 8 8 8 oleate Laurylamine 4 4 4 4 4 4 octaethylene glycol Octadecane 3 3 3 3 3 3 Tetraethy- 2 2 2 2 2 2 lene glycol octylate Methyl p- 0.5 0.5 0.5 0.5 0.5 0.5 oxybenzoate Methyl 1 1 1 1 1 1 benzotriazole HTS *1 0 0 0 0 0 0 Compound 0 3 3 3 0 0 A Ion- 77.5 77.5 77.5 77.5 77.5 77.5 exchanged water Filament 178 170 181 187 226 245 temperature (° C.) Increment of 0.000 0.000 0.000 0.001 0.009 0.012 filament dia- meter (mm) -
TABLE 6 Com- Com- Conven- parative parative tional Exam- Exam- Exam- Exam- Exam- Example ple ple ple ple ple 2 38 39 40 14 15 Lubricant composition (part by weight) Ethylene- 4 4 2 1 2 1 diamine phosphate Triethanol 8 8 8 8 8 8 oleate Laurylamine 4 4 4 4 4 4 octaethylene glycol Octadecane 3 3 3 3 3 3 Tetraethy- 2 2 2 2 2 2 lene glycol octylate Methyl p- 0.5 0.5 0.5 0.5 0.5 0.5 oxybenzoate Methyl 1 1 1 1 1 1 benzotriazole HTS *1 5 5 5 5 5 5 Compound 0 3 3 3 0 0 A Ion 77.5 77.5 77.5 77.5 77.5 77.5 exchanged water Filament 180 170 180 187 220 240 temperature (° C.) Increment of 0.000 0.000 0.000 0.001 0.006 0.009 filament dia- meter (mm) - As seen from Tables 5 and 6, the rise of the filament temperature and the increment of filament diameter are controlled and the good lubricity is maintained in the examples as compared with the comparative examples.
- As mentioned above, according to the invention, steel filaments having an excellent adhesion property to rubber are obtained by compounding the compound(s) defined in the invention with the lubricant composition and surface-treating the steel filaments therewith during the drawing. And also, when the rubber-steel filament composite body using the thus treated steel filaments is used as a reinforcing member for the rubber article, it is possible to reduce the cobalt salt of the organic acid and hence the durability of the rubber article can largely be improved without damaging the adhesion property.
Claims (25)
1. A lubricant composition for steel filament comprising at least one compound selected from the group consisting of sodium 1,6-hexamethylenediamine-dithiosulfate dihydrate, a compound represented by the following formula (1):
R1—S—S—A—S—S—R2 (1)
(wherein a is an alkylene group having a carbon number of 2-10, and each of R1 and R2 is a monovalent organic group containing at least one nitrogen atom), a monoalkali metal salt of triazine thiol, a thiadiazole compound, bivalent or trivalent cobalt salt of an inorganic acid, a schiff base complex represented by the following formula (2) or (3):
(wherein R3 is an alkyl group having a carbon number of 1-10 and X is —R4— or —R4—NH—R4— in which R4 is an alkylene group having a carbon number of 1 to 10), a cobalt alcholate represented by the following formula (4):
(R5—O—)2—Co (4)
(wherein R5 is an alkyl group having a carbon number of 1-20, a phenyl alkyl group or an alkyl phenyl group provided that a carbon number of the alkyl group is 1-10), a cobalt complex represented by the following formula (5):
(wherein R6 is an alkyl group having a carbon number of 1-20 or a —NHR7 group or a —OR7 group in which R7 is an alkyl group having a carbon number of 1-20), a metal borate derivative represented by the following formula (6):
BO—M—Y)3 (6)
(wherein M is Co or Ni and Y is an acid residue of a monocarboxylic acid having a carbon number of 2-21 or an aromatic group containing monocarboxylic acid having a carbon number of 2-21 provided that Ys are the same or different), a metal aluminate derivative represented by the following formula (7):
AlO—M—Y)3 (7)
(wherein M is Co or Ni and Y is an acid residue of a monocarboxylic acid having a carbon number of 2-21 or an aromatic group containing monocarboxylic acid having a carbon number of 2-21 provided that Ys are the same or different), a cobalt, nickel or iron salt of dithiocarbamate or dithiocarbonate, a cobalt dithiocarbamate represented by the following formula (8):
(wherein R8 is an alkyl group having a carbon number of 1-20 and Z is an oxygen atom or a sulfur atom provided that Zs are the same or partly different), a cobalt dithiophosphate represented by the following formula (9) or (10):
(wherein R9 or R10 is a hydrocarbon residue having a carbon number of 1-20 and Z is an oxygen atom or a sulfur atom provided that Zs are the same or partly different), and a molybdenum salt of a carboxylic acid represented by the following formula (11):
(wherein R11 is an alkyl group having a carbon number of 1-20).
2. A lubricant composition for steel filament comprising at least one compound represented by the following formula (12):
(wherein R12, R13, R14 and R15 are independently an alkyl group having a carbon number of 1-20, a cycloalkyl group having a carbon number of 3-20, a monovalent aromatic ring-containing group having a carbon number of 3-20 and, if necessary, containing at least one heteroatom selected from the group consisting of an oxygen atom, nitrogen atom and sulfur atom provided that at least one of R12, R13, R14 and R15 contains at least one of carboxyl group and/or ester compound thereof in its molecule, and x is an integer of 1 to 5)
3. A lubricant composition according to claim 1 , wherein A in the formula (1) is a hexamethylene group.
4. A lubricant composition according to claim 1 , wherein each of R1 and R2 in the formula (1) is a nitrogen-containing monovalent organic group containing at least one aromatic ring.
5. A lubricant composition according to claim 1 , wherein each of R1 and R2 in the formula (1) is a monovalent organic group having a group of bonding a carbon atom to a dithio group represented by ═N—C(═S)— group.
6. A lubricant composition according to claim 1 , wherein the compound of the formula (1) is α,ω-bis(N, N′-dihydrocarbylthiocarbamoyldithio) alkane represented by the following formula (13):
(wherein each of R16 to R19 is an alkyl group, an aryl group or an aralkyl group, provided that at least one of R16 and R17 and at least one of R18 and R19 are an aryl group having a carbon number of 6-20 or an aralkyl group having a carbon number of 7-20, and n is an integer of 2 to 10).
7. A lubricant composition according to claim 5 , wherein the compound of the formula (12) is 1,6-bis(N, N′-dibenzylthiocarbamoyldithiohexane.
8. A lubricant composition according to claim 1 , wherein a metal in the monoalkali metal salt of triazine thiol is selected from lithium, sodium and potassium.
9. A lubricant composition according to claim 7 , wherein at least one of boric acid and boric esters is added in addition to the monoalkali metal salt of triazine thiol.
10. A lubricant composition according to claim 8 , wherein the boric ester has 1 to 3 boron elements per one molecule and an alcohol residue having a carbon number of 1 to 4.
11. A lubricant composition according to claim 1 , wherein the thiadiazole compound is a dimercaptothiadiazole.
12. A lubricant composition according to claim 10 , wherein the dimercaptothiadiazole is 2,5-dimercapto-1,3,4-thiadiazole.
13. A lubricant composition according to claim 10 , wherein the dimer-captothiadiazole is a monosubstituted body selected from the group consisting of sodium salt, potassium salt, lithium salt, ammonium salt and zinc salt.
14. A lubricant composition according to claim 1 , wherein an inorganic acid in the bivalent or trivalent cobalt salt of the inorganic acid is at least one of hydrochloric acid, sulfuric acid, nitric acid and carbonic acid.
15. A lubricant composition according to claim 1 , wherein the Schiff base of the formula (2) is N, N′-disalycylidene ethylene diamine.
16. A lubricant composition according to claim 1 , wherein the cobalt alcholate is cobalt stearyl alcholate or cobalt nonylphenyl alcholate.
17. A lubricant composition according to claim 1 , wherein the cobalt complex of the formula (5) is at least one of cobalt acetylacetonate (II), cobalt acetylacetonate (III) and cobalt acetoanilide (II).
19. A lubricant composition according to claim 1 , wherein the dithiocarbamate is cobalt bis(diethyldithiocarbamate)(II).
20. A lubricant composition according to claim 1 , wherein the dithiocarbonate is cobalt bis(o-ethyldithiocarbonate)(II).
21. A lubricant composition according to claim 1 wherein the dithiocarbonate is cobalt bis(o-ethyldithiocarbonate)(II).
22. A lubricant composition according to claim 1 , wherein the molybdenum salt of the formula (11) is molybdenum palmitate, molybdenum vehenate, molybdenum stearate, molybdenum palmitolate, molybdenum oleate or molybdenum linorate.
23. A lubricant composition according to claim 2 , wherein the compound of the formula (12) is a compound represented by the following formula (15):
(wherein R12, R14 and x are the same as in the formula (12), and R20, R22 are independently an alkylene group having a carbon number of 1-19, a cycloalkylene group having a carbon number of 3-19 or a bivalent aromatic ling-containing group having a carbon number of 3-19, direct bond, and R21, R23 are independently hydrogen atom, methyl group or ethyl group).
24. A steel filament having on its surface a layer of a lubricant composition as claimed in any one of claims 1 to 23 .
25. A rubber-steel filament composite body consisting of a rubber composition and a steel filament and having a layer of a lubricant composition as claimed in any one of claims 1 to 23 at an interface therebetween.
Applications Claiming Priority (10)
Application Number | Priority Date | Filing Date | Title |
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JP2000-196,243 | 2000-06-29 | ||
JP2000-195,648 | 2000-06-29 | ||
JP2000196244 | 2000-06-29 | ||
JP2000196243 | 2000-06-29 | ||
JP2000-196,244 | 2000-06-29 | ||
JP2000-196,245 | 2000-06-29 | ||
JP2000196245 | 2000-06-29 | ||
JP2000195648 | 2000-06-29 | ||
JP2001175826A JP2002363586A (en) | 2001-06-11 | 2001-06-11 | Lubricant composition for steel filament, steel filament treated with this and rubber/steel filament composite |
JP2001-175,826 | 2001-06-11 |
Publications (1)
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US20020103089A1 true US20020103089A1 (en) | 2002-08-01 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/893,691 Abandoned US20020103089A1 (en) | 2000-06-29 | 2001-06-29 | Lubricant composition for steel filament and rubber-steel filament composite body |
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US (1) | US20020103089A1 (en) |
EP (1) | EP1172430A3 (en) |
Cited By (10)
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US20080260959A1 (en) * | 2005-02-10 | 2008-10-23 | Basf Aktiengesellschaft Patents, Trademarks And Licences | Use of Dithiophosphinic Acid and/or Its Salts for Producing Anti-Corrosion Coatings that are Devoid of Chrome |
US20090298728A1 (en) * | 2004-12-17 | 2009-12-03 | Brouse Robert J | Lubricants, Greases and Aqueous Fluids Containing Additives Derived from Dimercaptothiadiazole Polymers |
CN102559351A (en) * | 2011-11-14 | 2012-07-11 | 武汉大学 | Automobile radial tire steel cord wet-pulling lubricating agent |
WO2012126948A1 (en) * | 2011-03-21 | 2012-09-27 | Chemson Polymer-Additive Ag | Stabilizer composition for halogen-containing polymers |
WO2013117249A1 (en) * | 2012-02-06 | 2013-08-15 | Nv Bekaert Sa | Ternary or quaternary alloy coating for steam ageing and cured humidity adhesion elongated steel element comprising a ternary or quaternary brass alloy coating and corresponding method |
US8772382B2 (en) | 2008-11-26 | 2014-07-08 | Chemson Polymer-Additive Ag | Heavy metal-free stabilizer composition for halogenated polymers |
US9403964B2 (en) | 2011-04-11 | 2016-08-02 | Chemson Polymer-Additive Ag | Hydroquinone compounds for reducing photoblueing of halogen-containing polymers |
US9951469B2 (en) | 2012-07-24 | 2018-04-24 | Nv Bekaert Sa | Steel cord for rubber reinforcement |
US10179479B2 (en) | 2015-05-19 | 2019-01-15 | Bridgestone Americas Tire Operations, Llc | Plant oil-containing rubber compositions, tread thereof and race tires containing the tread |
US10619271B2 (en) | 2012-02-06 | 2020-04-14 | Nv Bekaert Sa | Process for manufacturing an elongated steel element to reinforce rubber products |
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EP1412478A2 (en) * | 2001-06-29 | 2004-04-28 | The Lubrizol Corporation | Stable dispersions of oil-insoluble compounds in hydrocarbons for use in lubricants |
US7060757B2 (en) * | 2003-02-06 | 2006-06-13 | Bridgestone Corporation | Rubber composition and pneumatic tire using the same |
PL2516729T3 (en) | 2009-12-23 | 2015-12-31 | Bekaert Sa Nv | A brass coated wire with a zinc gradient in the coating and its method of manufacturing |
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EP0079302A2 (en) * | 1981-10-29 | 1983-05-18 | Ciba-Geigy Ag | Lubricants containing thio ethers of beta-dicarbonyl or beta-cyano-carbonyl compounds |
US4569797A (en) * | 1983-08-11 | 1986-02-11 | Virginia Chemicals Inc. | Production of isoxanthate salts and dithiocarbonate diesters |
US4594335A (en) * | 1984-05-11 | 1986-06-10 | The Dow Chemical Company | Transition metal aluminates |
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US4519924A (en) * | 1984-06-11 | 1985-05-28 | The Dow Chemical | Lithium stearate aluminate as lubricant additive |
FR2599045B1 (en) * | 1986-05-26 | 1988-07-29 | Elf France | ADDITIVES WITH ANTICORROSION EFFECT FOR AQUEOUS FLUIDS AND COMPOSITIONS CONTAINING SAID ADDITIVES |
GB8711191D0 (en) * | 1987-05-12 | 1987-06-17 | Bp Chemicals Additives | Lubricating oil additives |
US5173341A (en) * | 1989-02-10 | 1992-12-22 | Tokyo Rope Mfg. Co., Ltd. | Rubber-reinforcing steel wires and method of manufacturing the same |
EP0470280B1 (en) * | 1990-08-07 | 1996-12-11 | Tokyo Rope Manufacturing Co., Ltd. | Method for manufacturing polymeric coated steel wires for rubber reinforcement |
CA2022890C (en) * | 1990-08-08 | 1998-11-24 | Nobuyoshi Shiratori | Rubber-reinforcing steel wires and method of manufacturing the same |
JPH06341073A (en) * | 1994-01-10 | 1994-12-13 | Kunio Mori | Adherent composite material of steel wire and rubber |
JPH093206A (en) * | 1995-06-15 | 1997-01-07 | Bridgestone Corp | Adhesive rubber composition |
CA2213050A1 (en) * | 1996-08-21 | 1998-02-21 | John S. Manka | Compositions containing thiocarbonates and acylated-nitrogen containing compounds |
JPH10195237A (en) * | 1997-01-09 | 1998-07-28 | Bridgestone Corp | Adhesive rubber composition |
GB9706468D0 (en) * | 1997-03-27 | 1997-05-14 | Exxon Chemical Patents Inc | Intermediate chain length ZDDP with high Mn dispersants give improved wear |
CN1259159A (en) * | 1997-04-04 | 2000-07-05 | 协和油化株式会社 | Composition containing dithiocarbonate compound |
JP3973323B2 (en) * | 1998-08-13 | 2007-09-12 | 日本ペイント株式会社 | Non-chromium treatment with sulfur-containing and phosphorus-containing compounds |
-
2001
- 2001-06-28 EP EP01305635A patent/EP1172430A3/en not_active Withdrawn
- 2001-06-29 US US09/893,691 patent/US20020103089A1/en not_active Abandoned
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US20090298728A1 (en) * | 2004-12-17 | 2009-12-03 | Brouse Robert J | Lubricants, Greases and Aqueous Fluids Containing Additives Derived from Dimercaptothiadiazole Polymers |
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US8772382B2 (en) | 2008-11-26 | 2014-07-08 | Chemson Polymer-Additive Ag | Heavy metal-free stabilizer composition for halogenated polymers |
US8975315B2 (en) | 2011-03-21 | 2015-03-10 | Chemson Polymer-Additive Ag | Stabilizer composition for halogen-containing polymers |
WO2012126948A1 (en) * | 2011-03-21 | 2012-09-27 | Chemson Polymer-Additive Ag | Stabilizer composition for halogen-containing polymers |
US9403964B2 (en) | 2011-04-11 | 2016-08-02 | Chemson Polymer-Additive Ag | Hydroquinone compounds for reducing photoblueing of halogen-containing polymers |
CN102559351A (en) * | 2011-11-14 | 2012-07-11 | 武汉大学 | Automobile radial tire steel cord wet-pulling lubricating agent |
WO2013117249A1 (en) * | 2012-02-06 | 2013-08-15 | Nv Bekaert Sa | Ternary or quaternary alloy coating for steam ageing and cured humidity adhesion elongated steel element comprising a ternary or quaternary brass alloy coating and corresponding method |
US10358769B2 (en) | 2012-02-06 | 2019-07-23 | Nv Bekaert Sa | Ternary or quaternary alloy coating for steam ageing and cured humidity adhesion elongated steel element comprising a ternary or quaternary brass alloy coating and corresponding method |
US10619271B2 (en) | 2012-02-06 | 2020-04-14 | Nv Bekaert Sa | Process for manufacturing an elongated steel element to reinforce rubber products |
US9951469B2 (en) | 2012-07-24 | 2018-04-24 | Nv Bekaert Sa | Steel cord for rubber reinforcement |
US10179479B2 (en) | 2015-05-19 | 2019-01-15 | Bridgestone Americas Tire Operations, Llc | Plant oil-containing rubber compositions, tread thereof and race tires containing the tread |
Also Published As
Publication number | Publication date |
---|---|
EP1172430A3 (en) | 2002-04-03 |
EP1172430A2 (en) | 2002-01-16 |
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