GB1424977A - Tetrapolymers and mineral oil compositions containing them - Google Patents
Tetrapolymers and mineral oil compositions containing themInfo
- Publication number
- GB1424977A GB1424977A GB2027074A GB2027074A GB1424977A GB 1424977 A GB1424977 A GB 1424977A GB 2027074 A GB2027074 A GB 2027074A GB 2027074 A GB2027074 A GB 2027074A GB 1424977 A GB1424977 A GB 1424977A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formula
- alkyl
- per cent
- tetrapolymers
- methacrylates
- 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.)
- Expired
Links
Classifications
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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
- C10M149/00—Lubricating compositions characterised by the additive being a macromolecular compound containing nitrogen
- C10M149/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M149/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amino group
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1812—C12-(meth)acrylate, e.g. lauryl (meth)acrylate
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- C10M143/00—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
- C10M143/10—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing aromatic monomer, e.g. styrene
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- C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
- C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M145/10—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
- C10M145/12—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate monocarboxylic
- C10M145/14—Acrylate; Methacrylate
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- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
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- C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms polycarboxylic
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
-
- 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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/042—Metal salts thereof
-
- 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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
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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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/12—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions obtained by phosphorisation of organic compounds, e.g. with PxSy, PxSyHal or PxOy
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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
- C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
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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
- C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2225/02—Macromolecular compounds from phosphorus-containg monomers, obtained by reactions involving only carbon-to-carbon unsaturated bonds
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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
- C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2225/04—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions obtained by phosphorisation of macromolecualr compounds not containing phosphorus in the monomers
- C10M2225/041—Hydrocarbon polymers
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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
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/02—Unspecified siloxanes; Silicones
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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
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/04—Siloxanes with specific structure
- C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
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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
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/04—Siloxanes with specific structure
- C10M2229/05—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon
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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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
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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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
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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
- C10N2070/00—Specific manufacturing methods for lubricant compositions
- C10N2070/02—Concentrating of additives
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Lubricants (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
1424977 Tetrapolymers TEXACO DEVELOPMENT CORP 8 May 1974 20270/74 Heading C3P [Also in Division C5] A tetrapolymer consisting essentially of (i) 4-10 wt. per cent of a dialkylaminoalkyl methacrylate of the formula wherein R and R<SP>1</SP> are C 1-2 alkyl and A is alkanediyl(alkylene) of 1-5 carbon atoms (ii) 15-25 wt. per cent of a styrene compound of formula wherein R<SP>2</SP> is H or C 1-10 alkyl (iii) 40-60 wt. per cent of an alkylmethacrylate of formula wherein R<SP>3</SP> is C 10-14 alkyl (iv) 20-30 wt. per cent of an alkylmethacrylate of formula wherein R<SP>4</SP> is C 16-20 alkyl preferred tetrapolymers having an intrinsic viscosity in benzene at 77 F. of 0À22-2À87. Component (i) may be selected from N,N-dimethylaminoethyl, N,N- diethylaminoethyl, N,N - dimethylaminopropyl, N,N - diethylaminopropyl methacrylates; (ii) from styrene, vinyl toluene, p-tbutylstyrene, p - t - octylstyrene; (iii) from decyl, undecyl, dodecyl, tridecyl, tetradecyl methacrylates or mixtures thereof; (iv) from hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl methacrylates or mixtures thereof. In the examples, N,N-dimethylaminoethylmethacrylate, lauryl methacrylate and stearyl methacrylate were polymerized with (I) vinyl toluene, (II)-(IV) styrene in naphthenic lubricating oil in the presence ofazobisisobutyronitrile and lauryl mercaptan. The polymers, in an amount 0À1-10% by wt. based on the total composition, are used as additives in mineral oil compositions (see Division C5).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00263801A US3816315A (en) | 1974-05-08 | 1972-06-19 | Mineral oil compositions |
GB2027074A GB1424977A (en) | 1974-05-08 | 1974-05-08 | Tetrapolymers and mineral oil compositions containing them |
DE2422609A DE2422609A1 (en) | 1974-05-08 | 1974-05-10 | LUBRICATING OIL FORMULATION |
CA200,676A CA1018509A (en) | 1974-05-08 | 1974-05-23 | Mineral oil compositions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2027074A GB1424977A (en) | 1974-05-08 | 1974-05-08 | Tetrapolymers and mineral oil compositions containing them |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1424977A true GB1424977A (en) | 1976-02-11 |
Family
ID=10143204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2027074A Expired GB1424977A (en) | 1974-05-08 | 1974-05-08 | Tetrapolymers and mineral oil compositions containing them |
Country Status (4)
Country | Link |
---|---|
US (1) | US3816315A (en) |
CA (1) | CA1018509A (en) |
DE (1) | DE2422609A1 (en) |
GB (1) | GB1424977A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2497822A1 (en) * | 1981-01-12 | 1982-07-16 | Organo Synthese Ste Fse | ADDITIVES FOR LUBRICATING OILS BASED ON STYRENE AND C12-C20 ALKYL HEAVY METHACRYLATES, MANUFACTURING METHOD AND APPLICATIONS |
US4361506A (en) * | 1980-02-08 | 1982-11-30 | Mobil Oil Corporation | Compositions comprising a poly(methyl ethenyl benzene) resin and mineral oil |
GB2219306A (en) * | 1988-05-27 | 1989-12-06 | Lubrizol Corp | Lubricating oil compositions containing carboxylic and derivatives |
GB2219597A (en) * | 1988-06-13 | 1989-12-13 | Lubrizol Corp | Lubricating oil compositions containing dithiophosphoric and derivatives |
GB2221474A (en) * | 1988-08-01 | 1990-02-07 | Lubrizol Corp | Lubricating oil compositions containing salts of dithiophosphoric acid |
GB2222601A (en) * | 1988-06-13 | 1990-03-14 | Lubrizol Corp | Lubricating oil compositions containing phosphordithioic acid derivatives |
EP0439254A2 (en) * | 1990-01-23 | 1991-07-31 | Rohm And Haas Company | Dispersant polymethacrylate viscosity index improvers |
WO2007127663A2 (en) * | 2006-04-24 | 2007-11-08 | The Lubrizol Corporation | Star polymer lubricating composition |
WO2008055797A1 (en) * | 2006-11-07 | 2008-05-15 | Ciba Holding Inc. | Methacrylate copolymer pourpoint depressants |
US8143202B2 (en) | 2006-11-07 | 2012-03-27 | Ciba Corp. | Methacrylate copolymer pour point depressants |
RU2467022C2 (en) * | 2006-11-07 | 2012-11-20 | Циба Холдинг Инк. | Methacrylate copolymer depressant additives |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4002569A (en) * | 1973-07-23 | 1977-01-11 | Texaco Inc. | Lubricating oil composition containing aminoester dispersant |
US4007121A (en) * | 1974-06-03 | 1977-02-08 | Texaco Inc. | Lubricating oil compositions containing a dispersant amount of aminated nitroketonized hydrocarbon terpolymers |
CA1043035A (en) * | 1974-06-25 | 1978-11-21 | George J. Briggs | Polymer-oil-black masterbatch |
JPS5222090A (en) * | 1975-08-11 | 1977-02-19 | Exxon Research Engineering Co | Additive for labricating oil comprising functional random copolymers |
FR2327233A1 (en) * | 1975-10-06 | 1977-05-06 | Raffinage Cie Francaise | NEW N-SUBSTITUTED ACRYLAMIDINES, COPOLYMERS OF N-SUBSTITUTED ACRYLAMIDINES AND ACRYLIC AND METHACRYLIC ACID ESTERS AND APPLICATIONS OF SUCH COPOLYMERS |
US4036767A (en) * | 1976-06-14 | 1977-07-19 | Texaco Inc. | Polymethacrylate additives and lubricating compositions thereof |
US4036766A (en) * | 1976-06-14 | 1977-07-19 | Texaco Inc. | Polymethacrylate additives and lube compositions thereof |
US4036768A (en) * | 1976-06-14 | 1977-07-19 | Texaco Inc. | Polymethacrylate and lube composition thereof |
US5227083A (en) * | 1992-02-27 | 1993-07-13 | Texaco Inc. | Polypropylene oxide dialkylsarcosinates for use as rust and haze inhibiting lubricating oil additive |
US6228819B1 (en) | 1994-04-14 | 2001-05-08 | Rohm And Haas Company | Process for making a viscosity index improving copolymer |
US5665685A (en) * | 1994-06-02 | 1997-09-09 | Sanyo Chemical Industries, Ltd. | Gear and transmission lubricant compositions of improved sludge-dispersibility, fluids comprising the same |
US5843874A (en) * | 1996-06-12 | 1998-12-01 | Ethyl Corporation | Clean performing gear oils |
US7560420B2 (en) * | 2004-12-23 | 2009-07-14 | Rohmax Additives Gmbh | Oil composition for lubricating an EGR equipped diesel engine and an EGR equipped diesel engine comprising same |
-
1972
- 1972-06-19 US US00263801A patent/US3816315A/en not_active Expired - Lifetime
-
1974
- 1974-05-08 GB GB2027074A patent/GB1424977A/en not_active Expired
- 1974-05-10 DE DE2422609A patent/DE2422609A1/en active Pending
- 1974-05-23 CA CA200,676A patent/CA1018509A/en not_active Expired
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4361506A (en) * | 1980-02-08 | 1982-11-30 | Mobil Oil Corporation | Compositions comprising a poly(methyl ethenyl benzene) resin and mineral oil |
EP0056342A1 (en) * | 1981-01-12 | 1982-07-21 | SOCIETE FRANCAISE D'ORGANO-SYNTHESE Société Anonyme dite: | Lubricating oil additives based on styrene and heavy (C12-20)-alkylmethacrylates, process for their preparation and applications thereof |
FR2497822A1 (en) * | 1981-01-12 | 1982-07-16 | Organo Synthese Ste Fse | ADDITIVES FOR LUBRICATING OILS BASED ON STYRENE AND C12-C20 ALKYL HEAVY METHACRYLATES, MANUFACTURING METHOD AND APPLICATIONS |
GB2219306A (en) * | 1988-05-27 | 1989-12-06 | Lubrizol Corp | Lubricating oil compositions containing carboxylic and derivatives |
GB2219306B (en) * | 1988-05-27 | 1991-05-08 | Lubrizol Corp | Lubricating oil compositions containing carboxylic derivatives |
GB2219597B (en) * | 1988-06-13 | 1991-10-23 | Lubrizol Corp | Lubricating oil compositions and concentrates containing dithiophosphoric acid derivatives |
GB2219597A (en) * | 1988-06-13 | 1989-12-13 | Lubrizol Corp | Lubricating oil compositions containing dithiophosphoric and derivatives |
GB2222601A (en) * | 1988-06-13 | 1990-03-14 | Lubrizol Corp | Lubricating oil compositions containing phosphordithioic acid derivatives |
US4981602A (en) * | 1988-06-13 | 1991-01-01 | The Lubrizol Corporation | Lubricating oil compositions and concentrates |
GB2222601B (en) * | 1988-06-13 | 1991-10-23 | Lubrizol Corp | Lubricating oil compositions |
GB2221474A (en) * | 1988-08-01 | 1990-02-07 | Lubrizol Corp | Lubricating oil compositions containing salts of dithiophosphoric acid |
GB2221474B (en) * | 1988-08-01 | 1993-01-20 | Lubrizol Corp | Lubricating oil compositions containing salts of dithiophosphoric acid |
EP0439254A2 (en) * | 1990-01-23 | 1991-07-31 | Rohm And Haas Company | Dispersant polymethacrylate viscosity index improvers |
EP0439254A3 (en) * | 1990-01-23 | 1992-02-12 | Rohm And Haas Company | Dispersant polymethacrylate viscosity index improvers |
WO2007127663A2 (en) * | 2006-04-24 | 2007-11-08 | The Lubrizol Corporation | Star polymer lubricating composition |
WO2007127663A3 (en) * | 2006-04-24 | 2007-12-13 | Lubrizol Corp | Star polymer lubricating composition |
WO2008055797A1 (en) * | 2006-11-07 | 2008-05-15 | Ciba Holding Inc. | Methacrylate copolymer pourpoint depressants |
US8143202B2 (en) | 2006-11-07 | 2012-03-27 | Ciba Corp. | Methacrylate copolymer pour point depressants |
RU2467022C2 (en) * | 2006-11-07 | 2012-11-20 | Циба Холдинг Инк. | Methacrylate copolymer depressant additives |
CN101535355B (en) * | 2006-11-07 | 2013-04-24 | 西巴控股有限公司 | Methacrylate copolymer pourpoint depressants |
Also Published As
Publication number | Publication date |
---|---|
DE2422609A1 (en) | 1975-12-04 |
US3816315A (en) | 1974-06-11 |
CA1018509A (en) | 1977-10-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |