Rhone-poulenc Specialites Chimiques

Pierre Gagne

Dominique Lespinasse

Michel Garcia

Jean-Bernard Chaux

Yvette Girardeau

Josiane Roussos

Bernard Pointud

Michel Peignier

Alain Senechal

Stable oil-in-water emulsions are prepared containing a relatively high concentration of from 8 to 60% by weight of a heteropolysaccharide bipolymer, e.g., xanthan gum preferably, the emulsions contain greater than 15 up to 60% biopolymer, 40 to 99 parts of an aqueous phase containing 10 to 60% by weight biopolymer and 40% to 90% by weight water, 1 to 60 parts oil and 1 to 40% with respect to the aqueous phase and oil of a surface active agent. The emulsions are prepared by combining powdered biopolymer with water, oil and surfactant or by concentrating an oil-in-water emulsion containing the biopolymer such as by ultrafiltration. A fermentation wort containing the biopolymer may be used in preparing the emulsion.

Oil-in-water emulsions containing heteropolysaccharide biopolymers

The invention provides a process for sizing warps of textile yarns. More particularly, the process involves use of compositions comprising, 40 to 90% by weight of a polyesterurethane and 10 to 60% by weight of an acrylic and/or vinyl polymer especially suitable for sizing polyester yarns such as polyethylene terephthalate.

Sizing composition and method of making same and use thereof for sizing

Compositions of matter, desirably in powder form, adapted for ready dispersion/dissolution in an aqueous medium, and which rapidly provide maximum viscosity values therefor, are comprised of an intimate admixture of a water soluble gum or polymer, a dispersion/dissolution enhancing amount of a water donor material, and, advantageously, an anionic and/or nonionic surfactant.

Water soluble gum/polymer compositions and hydrosols prepared therefrom

The invention provides a sizing composition based on water-soluble polymers, intended for sizing warps of textile yarns and a process for obtaining such compositions and for the sizing of textile yarns. More particularly, provided are compositions comprising, 40 to 90% by weight of a polyester-urethane and 10 to 60% by weight of an acrylic and/or vinyl polymer especially suitable for sizing polyester yarns such as polyethylene terephthalate.

Compositions of matter, desirably in powder form, adapted for ready dispersion/dissolution in an aqueous medium, and which rapidly provide maximum viscosity values therefor, are comprised of an intimate admixture of a water soluble biogum heteropolysaccharide, a dispersion/dissolution enhancing amount of a water donor material, and, advantageously, an anionic and/or nonionic surfactant.

Growing community of inventors

Tassin la Demi Lune, France

Pierre Gagne