Abstract: The disclosure includes a lubricant composition further including: (a) at least one synthetic base oil and optionally at least one additive and (b) carbon nanotubes, the composition having a weight percentage of carbon nanotubes (b) relative to the total amount of base oils (a) of the composition of between 0.15 and 3.50%, the ratio between the weight percentage of carbon nanotubes, and the apparent density of the powder of carbon nanotubes, expressed in g/1 and measured according to the standard ISO 60-ASTM D1895 being greater than 102.

Abstract: The present invention relates to oils based on polyol esters, which may be obtained from renewable resources and used as lubricant bases or lubrication additives, notably in four-stroke engine oils, oils for hydraulics or transmissions, as well as industrial lubricants.

Abstract: Compositions produced by forming a homogenous mass consisting of a bitumen matrix wherein a cross-linked and/or functionalized elastomer produced in situ from a precursor elastomer is dispersed in a uniform manner and makes up 0.5-30% of the weight of the bitumen matrix. The bitumen matrix is created by associating 95%-20 wt. % non oxidized bitumen having a penetrability of 20-900 and 5-80 wt. % oxidized bitumen having a penetrability of 10-90. The compositions can be used as bitumen binders in the production of coverings.

Abstract: Bitumen/polymer compositions are provided containing a bitumen or a mixture of bitumens and, reckoned by weight of bitumen, 0.3% to 20% of at least one primary polymer selected among certain elastomers and plastomers and 0.01% to 12% of at least one olefinic polymer bearing epoxy or COOH groupings. The compositions are useful, directly or after dilution, to form bitumen/polymer binders for carrying out road surfacing, for coated materials or waterproof coatings.

Abstract: Bitumen/polymer compositions are produced by contacting, between 100.degree. C. and 230.degree. C., under agitation, one bitumen or a mixture of bitumens with at least one olefinic polymer bearing epoxy or COOH groupings, then by incorporating in the product, an acid additive while the whole mixture is agitated at a range between 100.degree. C. and 230.degree. C. for at least 10 minutes. The product, which is subjected to treatment by the acid additive may still contain one or several additional polymers, for instance of the elastomer type cross-linkable with sulphur, and even be subjected to sulphur cross-linking before treatment. The bitumen/polymer compositions are useful directly or after dilution, to form binders for carrying out surfacing operations.

Abstract: Bitumen/polymer compositions with a broadened plasticity range are produced by contacting a bitumen or bitumen mixture with a sulphur-cross-linkable elastomer and a sulphur-donating coupling agent, at 100.degree.-230.degree. C. and under stirring conditions, to produce a cross-linked bitumen/polymer composition, then adding to the composition, maintained at 100.degree.-232.degree. C. and under stirring conditions, an acidic additive selected from polyphosphoric acids, acids of formula R--(COO).sub.t --SO.sub.3 H wherein t=0 or 1 and R is a monovalent hydrocarbyl radical having up to 12 carbon atoms, and mixtures of both types of acid separately or jointly with sulphuric acid, and maintaining the resulting reaction medium at 100.degree.-230.degree. C. and under stirring conditions for at least ten minutes. The bitumen/polymer compositions may be used directly or in diluted form to produce bituminous binders for making road surfaces, coated materials or sealing coatings.

Abstract: A functionalized elastomer is provided which is of the type containing a substrate elastomer, having a weight-average molecular mass (Mw).sub.0 of between 10,000 and 600,000 daltons and a polydispersity index of less than 5, onto which are grafted, in an amount representing 0.1 to 10% by weight of the substrate, sequences carrying carboxyl or ester functional groups, wherein its weight-average molecular Mw is such that the ratio ##EQU1## is less than 20% and the sequences grafted onto the substrate correspond to the formula ##STR1## in which R.sub.1 denotes an (x+z+1)-valent C.sub.1 to C.sub.12 hydrocarbon radical, X represents H or a monovalent C.sub.1 to C.sub.12 hydrocarbon radical R, z is equal to zero or 1 and x is an integer having a value ranging from 1 to 3 with x+z .ltoreq.3. Bitumen/EF compositions useful for making surfacings may be produced by incorporating the EF into a bituminous component.

Abstract: Bitumen/polymer compositions with a broadened plasticity range are produced by stirring together a bitumen or bitumen mixture and a sulphur-cross-linkable elastomer as well as a sulphur-donating coupling agent at 100.degree.-230.degree. C. to give a cross-lined bitumen/polymer composition, stirring an acid or acid anhydride inorganic admixture into the composition at 100.degree.-230.degree. C., and maintaining the resulting reaction medium at 100.degree.-230.degree. C. while stirring for at least 20 minutes. Such bitumen/polymer compositions may be used directly or in dilute form to provide bituminous binders for road surfaces, coated materials and sealing coatings.

Abstract: The present invention relates to the preparation of antioxidant additives to lubricants and to their use in lubricating compositions. The additives according to the invention have the formula:ArAr'(H)N--(R--X).sub.a --R'Ywhere--Ar and Ar' are identical or different aromatic radicals, R and R', which are identical or different, denote a C.sub.2 -C.sub.18 linear or branched alkylene radical, X denotes an oxygen or sulphur atom or an --NH group, a is an integer between 0 and 5 and Y is chosen from the group consisting of --NR.sub.1 R.sub.2, where R.sub.1 and R.sub.2, which are identical or different, denote a hydrogen atom or a C.sub.1 -C.sub.12 alkyl, alkenyl, cycloalkyl or arylalkyl radical --N.dbd.CH--Ar.sub.1 where Ar.sub.1 is an aryl radical containing at least one phenolic group --NR.sub.1 --CO--Ar.sub.1 and ##STR1## where R.sub.3 denotes a saturated or unsaturated, linear or branched alkyl radical.

Abstract: The invention relates to additives to lubricants resulting from the condensation of a primary or secondary amine and/or of an alkylene polyamine with a copolymer containing vicinal carboxylic groups.Derivatives of phenothiazine, or naphthylamine and of diphenylamine are employed in most cases as alkylene polyamine.These compounds can be employed as multifunctional additives to lubricants.

Abstract: The invention provides polymeric compounds resulting from the condensation of a primary amine having one phenolic group in its molecule with a copolymer of carboxylic acid functions.The copolymer is formed by copolymerization of an unsaturated monocarboxylic acid with at least one derivative of such a acid or by grafting of an unsaturated acid on a hydrocarbon polymer. These compounds can be especially used as multifunctional additives to lubricants.