Abstract: A lubricating oil composition comprising an oil of lubricating viscosity and a total of from about 1 to about 50% by weight of copolymers comprising (A) at least one ethylene-aliphatic olefin copolymer wherein the aliphatic olefins contain from 3 to about 24 carbon atoms, said copolymer (A) having {overscore (M)}n ranging from about 600 to about 5000, and (B) at least one copolymer comprising units derived from alkyl acrylate ester monomers containing from 2 to about 25 carbon atoms in the ester group, and optionally, from about 0.1% to about 20% by weight of at least one member of the group consisting of vinyl aromatic monomers and nitrogen-containing vinyl monomers. said copolymer (B) having {overscore (M)}n ranging from about 10,000 to about 350,000, wherein the weight ratio of (A):(B) ranges from about 99:1 to about 1:99.

Abstract: Viscosity index improvers, are disclosed, comprising the following polymer (A1) or (A0). Polymer (A1) has a solubility parameter of 8.6-9.4, a crystallizing initiation temperature of −15° C. or less and a steric hindrance factor (F) of 0-13, and comprises units of at least one of (a) C1-40alkyl group-containing (meth)acrylates, (b) alkyl alkenyl ethers, (c) alkenyl carboxylates and (d) nitrogen-containing unsaturated monomers. Polymer (A0) comprises units of a branched C20-40alkyl group-containing (meth)acrylate (a0) capable of providing a homopolymer having a Tc of 5° C. or less and units of another alkyl (meth)acrylate. Monomers, 2-decyl-tetradecyl methacrylate and 2-decyl-tetradecyl acrylate, are also described, suitable for producing polymers for viscosity index improvers.

Abstract: Viscosity index improvers, are disclosed, comprising oil-soluble copolymer (A) comprising units of 5-90% by weight of a monomer (a) represented by the general formula:

Abstract: The lubricating oil of the present invention has a viscosity suitable for use in a diesel engine and includes at least one functionalized olefin polymer, and at least one zinc dialkyl dithiophosphate (ZDDP). The ZDDP is made from a mixture of primary alcohols or a mixture of primary and secondary alcohols, wherein the lubricant has a high boundary film value greater than or equal to 15, and preferably greater than 60, as measured by using a High Frequency Reciprocating Rig (HFRR).

Abstract: Engine oil compositions are provided containing (A) a lubricating base oil having a kinematic viscosity at 100° C. of 3 to 6 mm2/S, a viscosity index of 120 or more, and a total aromatic content of 5 percent by mass or less and (B) a polymethacrylate-based viscosity index improver, preferably having a weight average molecular weight of 180,000 or more, (A) and (B) being blended in such an amount that the composition has a kinematic viscosity at 100° C. of 4.0 to 9.3 mm2/s. The engine oil compositions may also contain a molybdenumdithiocarbamate, as well as one or more other engine oil additives. The engine oil compositions preferably have a high-temperature, high shear viscosity at 150° C. of 2.4 to 2.7 mPa·s, a NOACK evaporation loss of 16 percent by mass or less, and a CCS viscosity at −25° C. of 3500 mPa·s or less.

Abstract: Engine oil compositions are provided containing (A) a lubricating base oil having a kinematic viscosity at 100° C. of 3 to 6 mm2/S, a viscosity index of 120 or more, and a total aromatic content of 5 percent by mass or less and (B) a polymethacrylate-based viscosity index improver, preferably having a weight average molecular weight of 180,000 or more, (A) and (B) being blended in such an amount that the composition has a kinematic viscosity at 100° C. of 4.0 to 9.3 mm2/s. The engine oil compositions may also contain a molybdenumdithiocarbamate, as well as one or more other engine oil additives. The engine oil compositions preferably have a high temperature, high shear viscosity at 150° C. of 2.4 to 2.7 mPa·s, a NOACK evaporation loss of 16 percent by mass or less, and a CCS viscosity at −25° C. of 3500 mPa·s or less.

Abstract: Viscosity index improvers, are disclosed, comprising the following polymer (A1) or (A0).

Abstract: A viscosity index improver, which comprises a polymer (A) having a solubility parameter of 8.6-9.4, a crystallizing initiation temperature of equal to or less than −15° C.

Abstract: The present invention discloses an ultraviolet light curable lubricating composition and method for making such a composition that may be used to produce a lubricating layer. The disclosed composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the lubricating layer after curing.

Abstract: A method for improving the low temperature fluidity of lubricating oil compositions based on addition to lubricating oils of a mixture of selected high molecular weight and low molecular weight alkyl (meth)acrylate copolymers is disclosed. Combinations of low molecular weight alkyl (meth)acrylate polymers containing zero to 25 weight percent (C16-C24)alkyl (meth)acrylate with high molecular weight alkyl (meth)acrylate polymers containing 25 to 70 weight percent (C16-C24)alkyl (meth)acrylate are especially effective at satisfying different aspects of low temperature fluidity properties simultaneously for a broad range of base oils.

Abstract: A composition is disclosed which comprises (A) At least one oil comprising a synthetic triglyceride, a natural oil or a derivative of a natural oil; (B) a hydrogenated block copolymer comprising a normal block copolymer or a random block copolymer, said normal block copolymer made from a vinyl substituted aromatic and an aliphatic conjugated diene, said normal block copolymer having from two to about five polymer blocks with at least one polymer block of said vinyl substituted aromatic and at least one polymer block of said aliphatic conjugated diene, said random block copolymer made from vinyl substituted aromatic and aliphatic conjugated diene monomers, the total amount of said vinyl substituted aromatic blocks in said block copolymer being in the range of from about 20 percent to about 70 percent by weight and the total amount of said diene blocks in said block copolymer being in the range of from about 30 percent to about 80 percent by weight; the number average molecular weight of said normal block cop

Abstract: A composition is disclosed which comprises

Abstract: A method for improving the low temperature fluidity of lubricating oil compositions based on addition to lubricating oils of a mixture of selected high molecular weight and low molecular weight alkyl (meth)acrylate copolymers is disclosed. Combinations of low molecular weight alkyl (meth)acrylate polymers containing zero to 25 weight percent (C16-C24)alkyl (meth)acrylate with high molecular weight alkyl (meth)acrylate polymers containing 25 to 70 weight percent (C16-C24)alkyl (meth)acrylate are especially effective at satisfying different aspects of low temperature fluidity properties simultaneously for a broad range of base oils.

Abstract: Polyalkyl (meth)acrylate copolymers comprising from about 12 to about 18 weight percent methyl methacrylate; from about 75 to about 85 weight percent of a C10-C15 alkyl (meth)acrylate; and from about 2 to about 5 weight percent of a nitrogen-containing dispersant monomer provide excellent low temperature properties to lubricating oils.

Abstract: Engine oil compositions comprise (A) a lubricating base oil having a kinematic viscosity at 100° C. of 2 to 6 mm2/S, a viscosity index of 120 or more, and a total aromatics content of 15 percent by mass or less and (B) a polymethacrylate-based viscosity index improver in such an amount that the composition has a kinematic viscosity at 100° C. of 4.0 to 9.3 mm2/s. Disclosed are also engine oil compositions which comprise (A) a lubricating base oil having a kinematic viscosity at 100° C. of 2 to 6 mm2/S, a viscosity index of 120 or more, and a total aromatics content of 15 percent by mass or less; (B) a polymethacrylate-based viscosity index improver in such an amount that the composition has a kinematic viscosity at 100° C. of 4.0 to 9.3 mm2/s; and (C) molybdenumdithiocarbamate.

Abstract: A copolymer comprising units derived from (a) methaciylic acid esters containing from about 9 to about 25 carbon atoms in the ester group and (b) methacrylic acid esters containing from 7 to about 12 carbon atoms in the ester group, said ester groups having 2-(C1-4 alkyl)-substituents, and optionally (c) at least one monomer selected from the group consisting of methacrylic acid esters containing from 2 to about 8 carbon atoms in the ester group atoms and which are different from methacrylic acid esters (a) and (b), vinyl aromatic compounds, and nitrogen-containing vinyl monomers with the proviso that no more than 60% by weight of the esters contain not more than 11 carbon atoms in the ester group. Also described are additive concentrates and lubricating oil compositions containing the copolymers and processes for preparing copolymers.

Abstract: A composition prepared by reacting (A) an esterified carboxy-containing interpolymer, said interpolymer being derived from at least two monomers, (i) one of said monomers being at least one vinyl aromatic monomer and (ii) the other of said monomers being at least one alpha, beta-unsaturated acylating agent, and having, before esterification, {overscore (M)}n determined by gel permeation chromatography ranging from about 8,000 to about 350,000, wherein from about 80% to about 99% of the carboxylic groups of said interpolymer are esterified, wherein from about 80 to about 100% of the ester groups contain from 8 to about 23 carbon atoms and from 0 to about 20% of the ester groups contain from 2 to 7 carbon atoms, with (B) a hydrocarbyl substituted carboxylic acid or functional derivative thereof wherein the hydrocarbyl group comprises from about 10 to about 400 carbon atoms, and (C) an amine having an average of more than 1 condensable N—H group, in any order or simultaneously, or with the preformed reac

Abstract: A homogeneous composition comprising (A) at least one polymeric carboxylic ester viscosity improver optionally containing nitrogen-containing groups, and (B) at least one hydrocarbyl group substituted ashless dispersant wherein the hydrocarbyl group has M.sub.n ranging from about 200 to about 800, and the weight ratio of (A):(B) ranges from about 3:1 to about 1:3, where in one embodiment, the polymeric carboxylic ester viscosity improver is (1) a polyacrylate ester copolymer, optionally containing nitrogen containing groups, containing from 2 to about 30 carbon atoms in the ester group and having M.sub.n ranging from about 10,000 to about 150,000, and in another embodiment, the polymeric carboxylic ester viscosity improver is (2) an esterified carboxy-containing interpolymer, having RSV ranging from about 0.05 to about 0.

Abstract: A viscosity index improver for addition to lubricating oil or the like, which comprises a graft copolymer having structural units of an oil-soluble polymer (a) comprising an olefin polymer and structural units of a copolymer (b) of a monomer having a peroxide bond with a (meth)acrylate or the like or a copolymer (c) of a monomer having a peroxide bond with 2-hydroxyethyl(meth)acrylate or the like. The improver is excellent in the effect of improving the viscosity index, the thickening effect, the fluidity at low temperatures and the shear stability, and has no fear of causing phase separation in lubricating oil.

Abstract: A copolymer comprising units derived from (a) methacrylic acid esters containing from about 9 to about 25 carbon atoms in the ester group and (b) methacrylic acid esters containing from 7 to about 12 carbon atoms in the ester group, said ester groups having 2-(C.sub.1-4 alkyl)-substituents, and optionally (c) at least one monomer selected from the group consisting of methacrylic acid esters containing from 2 to about 8 carbon atoms in the ester group atoms and which are different from methacrylic acid esters (a) and (b), vinyl aromatic compounds, and nitrogen-containing vinyl monomers with the proviso that no more than 60% by weight of the esters contain not more than 11 carbon atoms in the ester group. Also described are additive concentrates and lubricating oil compositions containing the copolymers and processes for preparing copolymers.

Abstract: Aqueous metal working fluids containing a mist suppressing copolymer are disclosed. The copolymer includes hydrophobic and hydrophilic monomers. Optionally, the metal working fluid may be an oil-in-water emulsion.

Abstract: A composition, comprising from about 20% to about 80% by weight of a diluent, prepared by reacting a mixture comprising(A) an esterified carboxy-containing interpolymer, said interpolymer being derived from at least two monomers, (i) one of said monomers being at least one of an aliphatic olefin containing from 2 to about 30 carbon atoms and a vinyl aromatic monomer and (ii) the other of said monomers being at least one alpha, beta-unsaturated acylating agent, and having, before esterification, M.sub.

Abstract: A dendrimer-based cold flow additive material.

Abstract: Additive concentrates comprising from at least one organic diluent selected from the group consisting of naphthenic oils and synthetic oils and from about 95% to about 50% by weight of an ester as defined herein are useful to prepare lubricating oils having good viscosity index and which also have exceptional low temperature characteristics.

Abstract: A clean performing gear oil for use in transmission oils and axle lubricants is provided. The gear oil having a Brookfield Viscosity at -12.degree. C. ranging from about 1,000 to about 150,000 cP, comprises a base oil having a kinematic viscosity at 100.degree. C. ranging from about 4.0 to about 41.0 cSt. Combined with the base oil is preferably a dispersant pour point depressant and/or a dispersant viscosity index improver. In a further preferred embodiment, the gear oil is essentially devoid of carboxylic-type ashless dispersants (e.g., succinimide dispersants) and Mannich base dispersants, thus realizing a cost saving over conventional gear oils which are used as transmission and axle lubricants. Functionalized polymethylacrylates (PMA) are disclosed as agents that improve the properties of the gear oil and allow for the omission of conventional dispersants.

Abstract: An automatic transmission fluid of low Brookfield viscosity and high shear stability is disclosed which contains a base oil of lubricating viscosity and a combination of a poly alkyl (meth) acrylate viscosity index improver of low Brookfield viscosity and high shear stability and a functionalized poly alkyl (meth) acrylate viscosity index improver with dispersant properties of high Brookfield viscosity and high shear stability.

Abstract: A composition comprising a carrier and a comb copolymer made by copolymerizing a polyalkyl (meth)acrylate macromonomer, present in an amount of 10-90 wt %, with the following monomers in a total amount of 90-10 wt %:(a) 0-90 wt % of C.sub.6 -C.sub.30 alkyl (meth)acrylates,(b) 0-60 wt % of nonfunctionalized comonomers selected form the group consisting of C.sub.1 -C.sub.5 alkyl (meth)acrylates, styrene, C.sub.1 -C.sub.4 alkyl styrenes, and vinyl esters of C.sub.2 -C.sub.12 carboxylic acids, and(c) 0-40 wt % of functionalized comonomers selected from the group consisting of functionalized (meth)acrylic acid esters and amides, and vinyl heterocyclic compounds, all of the above amounts based on the weight of the graft copolymer.The composition is especially useful as a lubricating oil additive with viscosity index-improving effect.

Abstract: A description follows of an additive for lubricating oils which is a viscosity-index improver, with dispersing properties and stable towards fluoroelastomers, having a greater shear stability and improved rheological behaviour at low temperature. The above additive is prepared by the polymerization of a composition of particular poly(meth)acrylates.

Abstract: A gear or transmission lubricant composition, comprising a major portion of mineral base oil, containing added thereto (A) a phosphorus-containing metal-free organic compound, such as a phosphate ester or amine salt thereof, and (B) an oil-soluble copolymer of (a) an alkyl (meth)acrylate and (b) a N,N-dialkylaminoalkyl (meth)acrylate, shows improved sludge dispersibility, and is useful as automatic transmission fluid.

Abstract: A lubricant composition is described which is useful as a chain bar lubricant for chain saws. The composition comprises(A) at least one triglyceride wherein the ratio of the oleic acid moiety:linoleic acid moiety is from about 2 up to about 90,(B) at least one viscosity modifying additive, and(C) at least one tackifier.Optionally, the composition may also contain(D) at least one pour point depressant and(E) at least one antiwear agent.

Abstract: The invention relates to comb polymers based on olefin copolymer macromonomers. Preferred comb polymers are copolymers of optionally hydrogenated olefin copolymer macromonomers of formula I ##STR1## wherein R' is hydrogen or methylR.sub.1 is the organic residue of a lithium-organic compound,[A] is a segment formed by 1,4-addition of butadiene potentially substituted with a C1-C6 alkyl residue[A'] is a segment formed by vinyl addition of butadiene potentially substituted with a C1-C6 alkyl residueand n+m stands for an integer of from 7 to 3,000, with (meth)acrylic ester monomers of formula II ##STR2## wherein R' is hydrogen or methyl, andR.sub.2 is an alkyl residue with 1 to 26 carbon atoms.