Rhone-poulenc Chimie

Rhodia Chimie

Schlumberger Technology Corporation

Momentive Specialty Chemicals Inc.

Roland Reeb

Bruno Langlois

Mathieu Joanicot

Mathias Destarac

Gilles Guerin

Michel Desbois

Joel Richard

Dominique Charmot

Daniel Joubert

Pierre Maroy

Gilda Maria Lizarraga

Catherine Hedouin

Olivier Anthony

Francedillaoise Truchet

C&eacute;cile Bonnet-Gonnet

V&eacute;ronique Barlet-Gouedard

Francoise Truchet

Jean-Pierre Lavallee

Roya Farhoosh

Jean-Marie Schwob

The present invention relates to a novel agent for promoting adhesion to a heat-insulating surface and in particular to a polystyrene surface, especially when wet or under the effect of a large variation in temperature. The invention also relates to the use of the said agent in a water-insoluble film-forming polymer composition or in a mineral binder composition for applications in the construction field and more particularly in external heat-insulation systems.

Adhesion-promoting agent for a thermal insulation surface

The present invention relates to a composition comprising at least one masked or unmasked polyisocyanate in the form of an aqueous emulsion whose mean size is between 0.1 and 10 micrometers; and at least one polyhydroxylated polymer, advantageously a polyol, in the form of a second aqueous dispersion whose mean size is between 10 and 200 nanometers wherein the content of polyhydroxylated polymer, advantageously of polyol, expressed in mass percent, is at least equal to &#x215a;R&#x2212;20, with R equal to the ratio of the mean size (d) of the emulsion to that of the dispersion of polyhydroxylated polymer, advantageously of polyol.

Composition, for use in coatings, based on a mixture of emulsion(s) and of dispersion(s) of polyolpolymer and coating(s) produced therefrom

The present invention relates to a composition comprising at least one masked or unmasked polyisocyanate in the form of an aqueous emulsion whose mean size is between 0.1 and 10 micometers; and at least one polyhydroxylated polymer, advantageously a polyol, in the form of a second aqueous dispersion whose mean size is between 10 and 200 nanometers wherein the content of polyhydroxylated polymer, advantageously of polyol, expressed in mass per cent, is at least equal to 5/6R-20, with R equal to the ratio of the mean size (d) of the emulsion to that of the dispersion of polyhydroxylated polymer, advantageously of polyol.

Composition, for use in coatings, based on a mixture of emulsion(s) and of dispersion(s) of polyol polymer and coating(s) produced therefrom

Cementing compositions which are particularly suitable for squeeze cementing operations, comprise an aqueous phase, and a micro-cement, the aqueous phase including an aqueous suspension comprising a vinyl acetate type polymer obtained by chemically cross-linking a polyvinyl compound, a nanolatex and an anionic surfactant with a cloud point of more than 80&deg; C.

Cementing composition and application thereof to cementing oil wells or the like

The invention relates to a gelling aqueous composition comprising block copolymers containing at least one water-soluble block and at least one block predominantly hydrophobic in nature, and forming a viscoelastic gel.

Gelled aqueous composition comprising a block copolymer containing at least one water-soluble block and one hydrophobic block

The invention relates to water-soluble block copolymers comprising at least one block of hydrophobic nature and at least one block of hydrophilic nature, the block of hydrophobic nature exhibiting hydrophilic units in an amount of between 33% and 99% by weight with respect to the total weight of the units of the hydrophobic block. These copolymers are preferably diblocks or triblocks and are prepared by a polymerization process referred to as a living or controlled. Control of their hydrophilic-lipophilic balance makes it possible to adjust their solubility in water and their self-association properties. These copolymers can be used in particular as adhesion agents or wetting agents.

Water-soluble block copolymers comprising a hydrophilic block and a hydrophobic block

An aqueous emulsion comprising at least one (co)polymer is provided. The (co)polymer is derived from a monomer having formula (1):

Aqueous emulsion of (CO) polymer made from monomer containing isocyanate

Aqueous emulsion of (co)polymer made from monomer containing isocyanate

Rheologically/water retentivity improved aqueous papercoating compositions comprise immixture, in water, of (i) a water-insoluble, non-alkali-swellable latex A of a film-forming polymer having a mean particle size .phi..sub.A ranging from 60 to 300 nm, (ii) a water-insoluble, alkali-swellable latex B of a polymer having a mean particle size .phi..sub.B ranging from 20 to 150 nm measured at a pH of from 2 to 4 and swelling at least 1.5 times in diameter in an alkaline medium, and (iii) an inorganic pigment C which comprises at least 40% by weight of CaCO.sub.3.

Aqueous papercoating compositions comprising a substantially H.sub.2

Acrylic polymers having glass transition temperatures less than 0.degree. C., notably formulated as exterior paint latices, comprise the copolymerizate of (a) at least one alpha,beta-monoolefinically unsaturated carboxylic monomer, (b) at least one (meth)acrylic acid ester of a primary or secondary alcohol having from 1 to 18 carbon atoms, optionally styrene, and (c) a comonomer having the formula (1): ##STR1##

Paint latices comprising benzophenone/acrylic copolymerizates

Low MFFT aqueous polymer dispersions of film-forming, relatively low Tg ethylenic/carboxylic polymer particulates, e.g., styrene/alkyl acrylate/acrylic acid copolymer particles, are well adapted for the production of wear- and soil-resistant coatings and adhesives, and include an effective, at least partially 'neutralizing' amount of a polyoxyalkyleneamine, e.g., a polyoxyalkyleneamine bearing at least one primary and/or secondary amine functional group.

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Gressy, France

Roland Reeb