Rhone-poulenc Industries

Rhone-progil

Jean Neel

Jean Boutin

Robert Violland

Paul M Roux

Bernard Papillon

Jacques Fritz

Alain Lagasse

Maurice Coudurier

Jean-Claude Caffarel

Water-soluble (meth)acrylic acid/methallylsulfonate copolymers, containing less than 20% by weight of the methallylsulfonate comonomer, are well suited as scale inhibitors for aqueous environments, especially those comprising essentially equal amounts by weight of both acrylic and methacrylic acids.

(Meth)acrylic acid/methallylsulfonate copolymers

Water-soluble (meth)acrylic acid/methallysulfonate copolymers, containing less than 20% by weight of the methallylsulfonate comonomer, are well suited as scale inhibitors for aqueous environments, especially those comprising essentially equal amounts by weight of both acrylic and methacrylic acids.

Scale inhibition method employing (meth)acrylic acid/methallylsulfonate

Water soluble polymeric flocculants are prepared by photopolymerizing olefinically unsaturated hydrophilic monomer(s), the photopolymerization recipe including a polyhydroxylated organic additive, such as gluconic acid. Such polyhydroxy compound facilitates solubilization of the resultant flocculants, without substantial decrease in the molecular weight thereof, and ensures against the by-production of water insoluble fractions.

Preparation of water soluble polymeric flocculants by

The thin rubbery layer resulting from the photopolymerization of a thin layer of an aqueous solution of acrylic monomer(s) is face surface coated with a coating of an alkali metal sulfite and/or metabisulfite, and is then shredded, dried and ground to provide acrylic polymer/copolymer from which virtually all residual monomer has been depleted and which is well suited for use as a polymeric flocculant.

Photopolymerized acrylic polymer essentially devoid of residual

Water soluble polymeric flocculants are prepared by photopolymerizing olefinically unsaturated hydrophilic monomer(s), the medium of photopolymerization being enveloped in a moist, humid gaseous atmosphere. The humidity of the enveloping environment facilitates solubilization of the resultant flocculants, without substantial decrease in the molecular weights thereof, and ensures against the by-production of water insoluble fractions.

Process for preparing acrylic monomers comprising reacting, in aqueos medium, amino alkyl esters of (meth) acrylic acid with a quaternizing agent wherein the aqueous solution obtained is washed with a water-insoluble solvent and the solvent thereafter removed. The quaternized monomers prepared are directly polymerizable to high molecular weight homopolymers or copolymers useful as cationic flocculants.

Process for obtaining and product acrylic monomers useful in the

Water-soluble acrylic polymers are prepared by a sequential photopolymerization process. A monomer solution is deposited on a support which is subsequently irradiated to effect polymerization. Photopolymerization promoters are incorporated in the monomer solution to facilitate polymerization.

Process for the preparation of water-soluble acrylic polymers by

Water-soluble polyurethanes are obtained by reacting sulfonated anionic polyesters containing about 0.8 to 2% sulfur with at least one diisocyanate to form film-forming polyurethanes which are directly soluble in water. The polyurethanes of the invention are advantageously applied in aqueous solution form as sizing for textiles and for bonding leathers.

Water-soluble polyurethanes and compositions and application thereof to

Surface-active composition based on non-ionic surfactants derived from ethoxylated saturated primary fatty alcohols. The composition is characterized in that it contains a solid mixture at ambient temperature of:

Surface-active composition based on non-ionic surfactants

Process of preparing anionic polyurethane latexes without the addition of a foreign emulsifying surface active agent comprising rendering the basic polyester or polyether constituent of the latex intrinsically emulsifiable or dispersible in water by incorporating an anionic functional group in the chain thereof and reacting this basic constituent with a diisocyanate in order to obtain a prepolymer which is then emulsified in water. The latexes obtained are advantageously applied in coating and impregnation processes, finishing of leather, and as binders for nonwoven fabrics.

Polyurethane latexes from sulfonate prepolymer, aqueous chain extension

A hydrophilic polyurethane composition comprising a reaction product of:

Hydrophilic polyurethanes and textiles treated therewith

Water soluble sulfonated polyesters made by polycondensation of an aromatic diacid or its anhydride or diester and an unsaturated aliphatic diacid or its anhydride or diester with a saturated glycol and sulfonating.

Water-soluble sulfonated polyesters

Water soluble sulfonated polyesters, made by polycondensation of an aromatic diacid or its anhydride or diester, an unsaturated aliphatic diacid or its anhydride or diester and a saturated glycol and sulfonating, are applied to textile fibers in sufficient amounts to act as sizing agents.

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Lyons, France

Jean Neel