Produits Chimiques Ugine Kuhlmann

Elf Atochem S.a.

Atochem

Atofina

Societe Atochem

Coflexip, Sa

Chimiques Ugine Kuhlmann

Albert Strassel

Jean Hardy

Gilbert Duperray

Bernard Guerin

Jean-Paul Ollivier

Serge Lorek

Serge Nawrot

Philippe Rocher

The invention relates to an article containing at least three layers, which is intended to adhere to a polymer incompatible with polyvinylidine fluoride (PVDF). The article comprises at least one layer of PVDF, at least one layer of PVDF rendered opaque to UV and visible radiation, and a composition for adhesion of the PVDF to an incompatible thermoplastic. The three-layer complex may be obtained by coextrusion. The three-layer complex is generally intended to form, with a PVDF-incompatible thermoplastic material, a novel 4-layer integral complex, either by coextrusion or by hot-pressing.

Complex material with improved properties, consisting of polyvinylidene fluoride and of an incompatible thermoplastic

This invention relates to a flexible metal pipe covered with an impermeable sheath of a shrinkable, preferably semicrystalline polymer or polymers, characterized in that it incorporates between the shrinkable polymer sheath and the metal pipe an intermediate elastomer layer (8), optionally vulcanized or reticulated, and/or a TPE in the form of a continuous tubular sleeve (FIG. 3) or of a tape (FIG. 4 to 6). Sheathed pipes of this type are particularly suitable for flexible pipelines, optionally with suitable supports, for carrying oil and gas.

Flexible metal pipes with a shrinkable polymer sheath, a process for

A polyamide-based tube for transporting a gasoline having resistance to permeability therethrough of the gasoline consisting essentially of an outer polyamide layer and an inner polyvinylidene fluoride layer bonded together by an adhesion binder.

Polyamide-based tube for a gasoline transport

A composition is provided which is coextrudable with vinylidene polyfluoride permitting it to adhere to incompatible polymeric resins, the composition which has a base of an alkyl polymethacrylate and a thermoplastic polymer is comprised of:

Composition for improving adhesion of vinylidene polyfluoride and

A composite material comprising a polyvinylidene fluoride layer, a substrate of a material that does not adhere to polyvinylidene fluoride, and an intermediate layer between said fluoride layer and substrate comprising a blend of polyvinylidene fluoride and a polymer containing carbonyl groups, ##STR1## in its polymer chain; the subject blend, and the process of treating a surface to adhere polyvinylidene fluoride thereto.

Polyvinylidene fluoride composite and method

A composition consisting essentially of a polyvinylidene fluoride polymer or copolymer having distributed substantially uniformly therethrough elastomeric particles, said elastomer being capable of absorbing hydrocarbons and fixing them in the composition and being present in an amount sufficient to increase the elongation and flexibility of the composition in the presence of hydrocarbons and shaped articles made therefrom.

Polyvinylidene fluoride compositions and products made therefrom

The present invention relates to laminates comprising a polyvinylidene fluoride resin layer, a thermoplastic resin layer, and an intermediate polyalkyl methacrylate layer and to the method of making such laminates, preferably by coextrusion.

Method of making polyvinylidene fluoride-thermoplastic resin laminates

The process of forming a laminate by molding, preferably either by compression or injection molding, a polymer which is incompatible with PVF.sub.2 onto the surface of a preformed laminate sheet of a PVF.sub.2 and a polyalkyl methacrylate, with the preformed laminate have been previously obtained by the coextrusion of the PVF.sub.2 and polyalkyl methacrylate.

Process for the manufacture of polyvinylidene fluoride - incompatible

Polyvinylidene fluoride-thermoplastic resin laminates and method

The present invention relates to laminates of a polyvinylidene fluoride resin (hereinafter referred to as 'PVF.sub.2 ') and a thermoplastic polyurethane that are formed without the use of any intermediate bonding agent and to the method of making such laminates, preferably by co-extrusion, wherein the polyvinylidene fluoride resin must have a certain specified apparent viscosity, at 200.degree. C., at certain specified velocity gradients.

Polyvinylidene fluoride-polyurethane laminates and method

The present invention relates to a process for treating polyvinylidene fluoride surfaces to enhance adhesion of other polymers thereto comprising applying to at least one surface thereof a solution consisting essentially of a coating polymer selected from a polyurethane or an alkyl polymethacrylate and at least one aprotic polar solvent in which said polymer is soluble, and exposing said surface to a temperature of from about 100.degree. to 300.degree. C. for a time sufficient to evaporate said solvent.

Process for treating polyvinylidene fluoride and resulting products

The present invention relates to a laminate comprising a polymethyl methacrylate layer having adheringly coated on at least one surface thereof a layer of polyvinylidene fluoride having a maximum thickness one-tenth the thickness of the polymethyl methacrylate layer; the total thickness of the polyvinylidene fluoride being no greater than about 400 microns. The invention also comprises the method of making such laminates.

Polymethyl methacrylate-polyvinylidene fluoride laminates and method

The present invention provides a process for treating polyvinyl fluoride surfaces to enhance adhesion of other polymers thereto comprising applying to at least one surface thereof a solution consisting essentially of a coating polymer selected from a polyurethane or an alkyl polymethacrylate and at least one aprotic polar solvent in which said polymer is soluble, and exposing said surface to a temperature of from about 120.degree. C. to 230.degree. C. for a time sufficient to evaporate said solvent. The treated polyvinyl fluoride having an adhering intermediary surface of polyurethane or alkyl polymethacrylate usefully serves as a means to secure the polyvinyl fluoride to another polymer which otherwise would not adhere to polyvinyl.

Growing community of inventors

Oullins, France

Albert Strassel