Societe Nationale Des Poudres Et Explosifs

Serge F Raynal

Sylvie L Boileau

Serge L Lecolier

Jean-Claude C Gautier

Paul J Caubere

Michel H Fontanille

Jean-Marie Lehn

Alain Lefumeux

Jean Robert Moinard

Alain Andre Cau

Francois Schue

Bernd Kaempf

Wilfrid Bergeret

Nicolas Krantz

Sylvia Boileau

Gilberte N N'Debeka

Gilberte Ndebeka

The invention relates to a composite material with lubricating properties consisting of a solid polymeric matrix such as polystyrene or polymethyl methacrylate containing between 20 and 85% by weight of a liquid oil with lubricating properties, such as a silicone oil. The material according to the invention is obtained by polymerization of an emulsion of the said oil in a monomer such as styrene or methyl methacrylate monomer in the presence of a surface-active agent which is a two- or three-block block copolymer in which one repeat unit is compatible with the said monomer. The materials according to the invention are used to form antierosive components for ammunition intended for barrel weapon systems and in particular wads (8) for shells (1).

Composite materials with lubricating properties, process for their

Composite material with lubricating properties, process for their

The invention relates to a process for the preparation of conductive polymers or prepolymers and to conductive polymers or prepolymers. The process of the invention consists of reacting a polymer containing ethylenic unsaturations such as a hydroxytelechelic polybutadiene with a silane compound of formula ##STR1## in which R.sub.1 denotes a hydrocarbon group containing at least one heteroatom bearing mobile electrons, such as the oxygen of an ether group, and R.sub.2 and R.sub.3 denote a substituted or unsubstituted organic residue or a group R.sub.1. The polymer obtained is precipitated by the addition of a compound which is not a solvent for the polymer, and is separated from the reaction medium. The polymers obtained have an electrical conductivity which is multiplied by a factor of 10.sup.5 relative to the unmodified polymer. The present invention applies in particular in the field of the polymer industry.

Conductive polymers or prepolymers from a polymer containing ethylenic

The invention relates to a polymer with ethylenic unsaturations incorporating silylmetallocene groups, a process for the manufacture of these polymers and a propellant composition having the polymer of the invention as a binder. The polymer of the invention incorporates ethylenic unsaturations, to at least some of which there are added silylmetallocene groups of formula ##STR1## in which M denotes a transition metal such as, for example, iron, the radicals R.sub.1, R.sub.2 and R.sub.3 being hydrocarbon radicals. The polymer may be a hydroxytelechelic or carboxytelechelic polybutadiene. This modified polymer is employed as a binder in composite propellant compositions, thus making it possible to solve the problem related to the migration of the combustion catalyst. The invention has application particularly in the field of solid propulsion.

Polymer with ethylenic unsaturations incorporating silylmetallocene

The present invention relates to a process for the manufacture of silylmetallocene compounds and the compounds obtained by this process. The process of the invention consists in reacting, in the presence of a hydrosilylation catalyst, a metallocene of general formula (I): ##STR1## M denoting a transition metal such as iron with a halosilane of general formula (II): ##STR2## in which X denotes a halogen and then reducing the resultant product to form a silylmetallocene compound containing at least one Si-H bond. The invention has application in the field of chemical industry.

Process for the manufacture of silylmetallocene compounds

The invention relates to a polymer with ethylenic unsaturations incorporating silylmetallocene groups, a process for the manufacture of these polymers and a propellant composition having the polymer of the invention as a binder. The polymer of the invention incorporates ethylenic unsaturations, to at least some of which there are added silylmetallocene groups of formula ##STR1## in which M denotes a transistion metal such as, for example, iron, the radicals R.sub.1, R.sub.2 and R.sub.3 being hydrocarbon 2 radicals. The polymer may be a hydroxytelechelic or carboxytelechelic polybutadiene. This modified polymer is employed as a binder in composite propellant compositions, thus making it possible to solve the problem related to the migration of the combustion catalyst. The invention has application particularly in the field of solid propulsion.

The invention relates to processes for the synthesis of tertiary phosphine oxides and sulfides. The process according to the invention consists, in a first step, of reacting a secondary phosphine oxide or sulfide with an optionally activated alkali metal amide, and, in a second step, of reacting the mixture obtained in the first step with an organic halide containing at least one halogenophenyl radical or one halogenomethyl group. Tertiary phosphine oxides and sulfides are complexing agents of high stability.

Process for the synthesis of tertiary phosphine oxides and sulfides, and

The invention relates to new associations of strong bases, having the following general formula:

Associations of bases, resulting from the combination of a lithium alkyl

The invention relates to processes for the synthesis of tertiary phosphine oxides and sulphides. The process according to the invention consists, in a first step, of reacting a secondary phosphine oxide or sulfide with an optionally activated alkali metal amide, and, in a second step, of reacting the mixture obtained in the first step with an organic halide containing at least one halogenophenyl radical or one halogenomethyl group. Tertiary phosphine oxides and sulphides are complexing agents of high stability.

Process for the synthesis of tertiary phosphine oxides and sulphides,

An initiator for the anionic polymerization of heterocyclic monomers comprises the product from the association of an alkali metal amide and the salt from at least one hydroxylated compound with the same alkali metal in an aprotic solvent. The hydroxylated compound is a primary alcohol, a secondary or tertiary alcohol, an ether alcohol, an amino alcohol, a polyether alcohol, a polyamino alcohol, a polyaminoetheralcohol, or an enol from a ketone.

Anionic polymerization of heterocyclic monomers with alkali metal amide

The invention relates to an anionic polymerization process using an initiator based on an alkali metal amide in combination with an alkali metal salt, as well as to the polymers obtained by this process. The polymerization process according to the invention is characterized in that an initiator is used which results from the combination of an alkali metal amide selected from the group comprising sodium amide, potassium amide or lithium amide and an alkali metal salt of which the cation is selected from the group comprising potassium, lithium or sodium, the anion being selected from the group comprising the thiocyanate, nitrite, cyanide and cyanate anions. These initiators make it possible to carry out the anionic polymerization or vinyl, heterocyclic and diene monomers in order to obtain special polymers or widely used polymers, with great adaptability and under advantageous economic conditions.

Anionic polymerization initiators based on alkali metal amides in

An initiator for the anionic polymerization of vinyl monomers and dienic monomers comprises the product from the association of an alkali metal amide and the salt from at least one hydroxylated compound with the same alkali metal in an aprotic solvent. The hydroxylated compound is a primary, secondary, or tertiary alcohol. The hydroxylated compound may be a member selected from the group consisting of an alcohol substituted by an heterocyclic group, alcohols containing ethylenic unsaturation, alcohols substituted by an aromatic group, alicyclic alcohols, aromatic alcohols, polyhydroxy compounds, ether-alcohols, polyether-alcohols, and enols from ketones and amino acids.

Novel initiators for anionic polymerization

The invention relates to a process for the anionic polymerization and copolymerization of vinyl, dienic and heterocyclic monomers. According to the invention, the process consists in carrying out the reaction in the presence of an initiator consisting of a molecular combination of an alkali metal amide and the salt of the same alkali metal with at least one hydroxylic compound and in the absence of solvent. The initiator can be prepared by intimately mixing its constituents or in the presence of a solvent of low polarity which is subsequently evaporated off, or in situ in the monomer. Application to the synthesis of special or widely used polymers and copolymers.

Bulk anionic polymerization process using an alkali metal amide and the

A process for the anionic polymerization or copolymerization of olefinic monomers, dienic monomers, vinyl monomers and heterocyclic monomers is described which comprises reacting at least one monomer which is an olefinic monomer, a vinyl monomer or an heterocyclic monomer with a catalyst capable of inducing anionic polymerization and an aprotic macroheterocyclic cryptant, said at least one monomer being the only medium for the reaction. The macroheterocyclic complexing agent has general formula ##STR1## in which: R.sub.1 is hydrogen, a hydrocarbon radical or alkoxycarbonyl, or the two R.sub.1 together can form a group of the general formula: ##STR2## in which A is a hydrocarbon radical,

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Draveil, France

Serge F Raynal