Produits Chimiques Ugine Kuhlmann

Rhone-poulenc-textile

Edouard Grimaud

Claude Tournut

Paul Couchoud

Jean Blaise

Robert Koeppel

Jean-Claude Lecoq

Jacques Vuillemenot

This invention relates to halogenated polyhydroxy compounds of the formula

Halogenated polyhydroxy compounds and their derivatives

Processes for treating the waste water, particularly waste water containing certain unsaturated compounds, from acrolein and acrylic acid production plants to reduce the chemical oxygen demand (COD), which processes comprise polymerizing the unsaturated compounds, desirably with peroxygen compounds; neutralizing the waste water with a reagent forming polyvalent metal ions to provide salts of the polymerized compounds; and separating the salts so formed.

Process for treating waste water from propylene oxidation plants

This invention relates to alkali salts of a sulphonated styrene polymer or copolymer having a degree of polymerization of less than about 140, to a process for their preparation, to their use as fluidizing agents for mineral binders and to mineral binders having the fluidizing agents incorporated therein.

Alkali salts of a sulphonated styrene polymer or copolymer as fluidizing

This invention relates to a method for the preparation of aqueous dispersions of polytetrafluoroethylene comprising polymerizing tetrafluoroethylene in an aqueous medium containing a polymerization initiator and an appropriate emulsifying agent as well as other necessary additives in the presence of a stabilizing amount of a stabilizing agent selected to be a saturated halogenated acyclic or cyclic hydrocarbon containing less than about 20 carbon atoms or an unsaturated halogenated acyclic or cyclic hydrocarbon containing less than about 20 carbon atoms which is not copolymerizable with the tetrafluoroethylene under the reaction conditions, or a mixture of said halogenated hydrocarbons.

Method for the preparation of aqueous dispersions of

A process for the polymerization of vinylidene fluoride H.sub.2 C=CF.sub.2 using a novel class of fluorinated emulsifiers having the general formula:

Process for the polymerization of vinylidene fluoride

This invention relates to aqueous dispersions of positively charged polytetrafluoroethylene. This inventon also relates to a process for preparing aqueous dispersions of positively charged polytetrafluoroethylene which comprises adding an aqueous dispersion of negatively charged polytetrafluoroethylene containing an anionic emulsifier to an aqueous solution of a cationic emulsifier kept under light agitation while maintaining a ratio of the molar concentration of cationic emulsifier to that of the anionic emulsifier greater than 1:1.

Positively charged aqueous dispersions of polytetrafluoroethylene and

The invention relates to threads, fibers or films comprising polyvinylidene fluoride, with good dye affinity for plastosoluble and cationic dyestuffs. More particularly, the invention relates to threads, fibers or films formed of a mixture of vinylidene fluoride homopolymer and of a copolymer containing at least 60% by weight of methyl methacrylate units and 5 to 40% by weight of units of at least one acid ethylenic comonomer, copolymerizable with methyl methacrylate. The threads and fibers in accordance with the invention can be used in particular in the field of textiles.

Growing community of inventors

Saint Genis Laval, France

Edouard Grimaud