Institut Francais Du Pe'trole

Elf Atochem S.a.

Essilor International (compagnie Generale D'optique)

Atochem

Daniel Paquer

Jean-Luc Mieloszynski

Maurice Born

Guy Parc

Ourida Aberkane

Martine Cerf

Lucienne Briquet

Michel Schneider

Guy Barc

Florence Caye

Doroth&eacute;e Jury

Mich&egrave;le Sindt

Jean Luc Mieloszynski

Jean Luc Mielzoszynski

Michele Curci

Mich Ele Curci

(Thio) (meth) acrylate monomers, intermediate compounds for the synthesis of these monomers, polymerizable compositions and polymers obtained, and their optical and ophthalmic uses

The novel monomers correspond to the formula:

(Thio) (meth) acrylate monomers, intermediate compounds for the synthesis of these monomers, polymerisable compositions and polymers obtained, and their optical and ophthalmic uses

Compounds represented by the formulae (I) and (II) in which:

Phosphorus- and sulfur-containing acrylates and methacrylates

These compounds are denoted by the following formula (I): ##STR1## in which: Z denotes H or a linear or branched alkyl radical,

(Meth) acrylic compounds, process for their preparation and their

Useful as additive for lubricating oils are novel phosphosulphur compounds in accordance with the general formula (I):

Process for the preparation of phosphosulfide compounds useful as oil

(Meth)acrylic compounds, process for their preparation and their

Novel sulfurized compounds, their preparation and use. The compounds are based on the general formula

New sulfured compounds, their preparation and their use as additives for

These acrylic and methacrylic compounds are chosen from those of the formula: ##STR1## in which R.sup.1 is H or CH.sub.3 ; A is (CH.sub.2).sub.n or n is an integer from 2 to 12 or --(CH.sub.2 CH.sub.2 O).sub.d --CH.sub.2 CH.sub.2 --, d is an integer from 1 to 20; X is S or O; Y is S or O, under the condition that X is S and Y is O when A is --(CH.sub.2 CH.sub.2 O).sub.d --CH.sub.2 CH.sub.2 --; R is C.sub.1 --C.sub.20 alkyl or --(CH.sub.2).sub.p SR.sup.3 where p is an integer from 3 to 12 and R.sup.3 is C.sub.1 -C.sub.20 -alkyl; m is an integer from 1 to 3; and Z is H, R.sup.2 QH, or R.sup.2 is C.sub.2 -C.sub.12 -alkyl and Q is O or S, and the atoms of the metals from Groups IA, IIA, IIIA, IB, IIB, VIB, VIIB and VIII of the Periodic Table, on condition that Z is H or R.sup.2 OH when m is 1 and m is the valence of Z when Z is a metal.

Phosphorus-containing acrylic compounds and polymers thereof

Phosphorus- and sulfur-containing acrylate and (meth) acrylate monomers

New sulfured compounds

New phosphosulfides compounds and use thereof as oil lubricants

Novel (poly)sulfurized carboxylic compounds, their preparation, and their use as additives to lubricating oils are disclosed. Such novel carboxylic compounds are more particularly esters of the general formula:

(Poly) sulfurized carboxylic compounds, their preparation and their use

The disclosed polysulfided olefin compositions can be used in particular as extreme-pressure additives for lubricants. They are prepared by a process comprising the steps of: (1) reacting sulfur monochloride and/or dichloride with at least one monoolefin having 2 to 5 carbon atoms (generally isobutene) to form an 'adduct'; (2) contacting said 'adduct' jointly with an unsaturated monohalogenated hydrocarbon compound, in a proportion corresponding to a number of halogen gram-atoms from about 1 to 70% of the number of halogen gram-atoms of the assembly 'monohalogenated hydrocarbon compound+adduct', with a sulfur compound (e.g. alkaline sulfide, hydrogenosulfide or polysulfide) and, mostly, element sulfur, in a proportion of 0 to 7 gram-atoms per mole of sulfur compound, within an aqueous or hydroalcoholic medium; (3) heating the mixture and, after settling in 2 phases, separating the organic phase containing the polysulfided olefin, and (4) optionally treating the obtained product with a base. The obtained polysulfided olefins, depending on their sulfur content, may be used as extreme-pressure additives in oil compositions for gears or for metal working.

Polysulfided olefin compositions, their preparation and use as additives

A method for the preparation of olefin polysulfides that can be used in particular as extreme pressure additives for lubricants is described. This method comprises: (1) reacting sulfur monochloride or dichloride with at least one mono-olefin containing 2 to 5 carbon atoms (in general isobutene) resulting in the formation of an adduct; (2) bringing into contact said adduct, conjointly with a hydrocarbyl halide, with a sulfur compound (for example, alkaline sulfides, hydrosulfides or polysulfides) and, in most cases, elemental sulfur, in an aqueous or aqueous-alcoholic medium; (3) heating the mixture and, after it has settled into two phases, separating the organic phase containing the olefin polysulfide; and if necessary (4) treating the product obtained with a base. The olefin polysulfides obtained contain a high proportion of sulfur, have a satisfactory viscosity and are sufficiently soluble in mineral oils as well as synthetic oils to be used as extreme pressure additives in the formulation of gear oils. Some of these products are also advantageous in the formulation of oils intended to be used in metal work.

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Vandoeuvre, France

Daniel Paquer