Elf Atochem S.a.

Autochem

Didier Vanhoye

Paul Grosius

Bernard Boutevin

Bruno Ameduri

Martine Cerf

Jean Lebez

Patrice Hurtel

Bruno Feret

Denis Melot

Robert Legros

Denis Tembou Nzudie

Yves Barbier

Mieczyslaw Wnuk

Cyril Wiegert

Laure Sarrazin

Elsa Ballot

Olivier Loubet

This composition, which is useful as a binder in the preparation of synthetic resin concretes or mortars, bonding primers or finishing coats, comprises (A) a system of monomers comprising: (a1) 50-90 parts of a dicyclopentenyloxyalkyl eater:

Composition based on a dicyclopentenyloxyalkyl ester of (meth) acrylic acid and its applications in the building sector

Concentrated and low viscosity aqueous dispersions, e.g., opaque emulsions, well suited as flocculants for water treatment, comprise the water-soluble polymerizate of at least one water-soluble hydrophilic monomer A, optionally, at least one amphiphilic comonomer B and/or, also optionally, at least one hydrophobic comonomer C, in the presence of at least one polymeric dispersant incompatible therewith, for example an imidized and salified styrene/maleic anhydride copolymer or poly(diallyldimethylammonium chloride).

Concentrated aqueous dispersions of water-soluble polymers

This pressure-sensitive adhesive polymer is obtained by emulsion polymerization of the mixture of the following monomers, for a total of 100% by weight: (A) 40 to 95% by weight of at least one (meth)acrylic or vinyl monomer capable of resulting in a homopolymer which has a glass transition temperature lower than or equal to -40.degree. C.; (B) 2 to 50% by weight of at least one (meth)acrylic or vinyl monomer capable of resulting in a homopolymer which has a glass transition temperature higher than or equal to 0.degree. C.; (C) 0.5 to 6% by weight of at least one carboxylic (meth)acrylic monomer; (D) 0 to 5% by weight of at least one (meth)acrylic monomer ethoxylated with 1 to 20 moles of ethylene oxide; (E) 0.05 to 1% by weight of at least one (meth)acrylic or vinyl monomer containing a ureido group; and (F) 0 to 2% by weight of at least one acrylic or vinyl monomer carrying a sulphonate functional group, the said polymer having a glass transition temperature lower than or equal to -25.degree. C.

Pressure-sensitive adhesive polymers

This fluorinated (meth)acrylic latex consists of a dispersion of particles or of a mixture of dispersions of particles, these dispersions being obtained by emulsion polymerization in an aqueous medium, in at least one stage, wherein one more perfluorinated monomer(s) of formula (I) has/have been used as sole fluorinated comonomer(s) for the formation of the particles, and which is/are distributed statistically in particles formed in one stage or distributed statistically in the shell of structured particles of the core-shell or core-intermediate layer(s)-shell type resulting from a polymerization in two stages and in more than two stages, respectively, the said latex consisting of a dispersion of the said structured particles or of a mixture of at least one dispersion of the said fluorinated structured particles and/or at least one dispersion of the said fluorinated statistical particles and at least one dispersion of unfluorinated statistical particles, the monomer or monomers of formula (I) representing less than 80% by weight of the shell of the fluorinated structured particles, the proportion of monomers of formula (I) relative to the collective monomers used to form all of the particles of the said latex being between 1.8 and 20% by weight. ##STR1## R.sup.1 .dbd.CH.sub.3 or H; R.sup.2 =perfluorinated C.sub.1 -C.sub.10 alkyl; and 0&lt;n.ltoreq.4.

Fluorinated acrylic and methacrylic latices and mixtures thereof,

This photopolymerizable composition includes an grafted reactive telomer containing trifluoroethyl methacrylate units, a reactive diluent and a photopolymerization initiator. It gives hydrophobic transparent coatings.

Photocrosslinkable compositions based on crafted reactive telomer of

Oligomers of the formula ##STR1## wherein: (1) at least one A=--CH.sub.2 CHR.sup.1 COODOH (a) (R.sup.1 =H, CH.sub.3 and D=C.sub.1 -C.sub.4 alkylene), the other A's=H or C.sub.1 -C.sub.4 alkyl, it being possible for at least a part of the residues (a) to be converted into A.sup.1 =--CH.sub.2 CHR.sup.1 COODOCONHD.sup.1 NCO (D.sup.1 =divalent organic residue), it being possible for at least a part of the residues A.sup.1 to be converted into A.sup.2 =--CH.sub.2 CHR.sup.1 COODOCONHD.sup.1 NHCOOR.sup.2 (R.sup.2 =monovalent radical obtained by removal of OH from a monoalcohol containing a vinylidene group);

Precursors of polymers containing isocyanurate units

This process for the manufacture of benzyl methacrylate and of its halogenated or alkylated derviatives by the reaction of benzyl chloride or of one of its halogenated or alkylated derivatives with an alkali metal methacrylate is characterized in that the reaction is carried out in the presence of not more than 3 mol %, based on the benzyl chloride or a derivative, of a tertiary amine. The alkali metal is chosen especially from lithium, potassium and sodium. The tertiary amine is preferably a tertiary diamine of general formula: ##STR1## in which n is an integer ranging from 1 to 10 and R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which are identical or different, are alkyl, cycloalkyl or aryl radicals containing from 1 to 12 carbon atoms, functionalized if appropriate and, if appropriate, such that they form a heterocyclic ring with the nitrogen atom(s) carrying them.

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Bernay, France

Didier Vanhoye