Transdiffusia S.a.

Fillger S.a.

Philippe Choquard

Roger Jp Lamartine

Arnold Marcillac

Francis Vocanson

Jean-Bernard Regnouf De Vains

Isabelle Dumazet

Christian Duchamp

Yvon Martelin

Philippe Goreloff

A curing or bridging composition is useful for effecting the crosslinking of phenolic resoles and the formation of novolaks. The composition comprises from 1% to 99% by weight of partially or totally sulfonated calixarenes and from 99% to 1% of partially or totally sulfonated linear phenolic oligomers, optionally together with partially or totally sulfonated phenol. To the contrary of conventional catalysts for the crosslinking of resoles and the formation of novolaks, the composition is chemically incorporated into the molecular structure of the final products; especially the sulfonated calixarenes confer new, surprisingly improved properties to phenolic resins and novolaks and sensibly accelerate the condensation reactions.

Curing composition for phenolic resins

Process for the preparation of calixarenes and new calixarene compounds

A process for recovering volatile, generally bad smelling low molecular, low polar substances called VLC, contained in gas streams, by capturing the same by in contacting the gaseous environment with a calixarene or a resorcinol calixarene present in the form of particles, granules, as a coating or impregnation on or in a solid support, or as an organic or aqueous solution.

Process for the recovery of volatile low molecular compounds

Process for the confinement of solid materials

Para sulfonated calixarenes are obtained in a one-step reaction directly from para blocked calixarenes by treating same with a sulfonating agent, such as concentrated sulfuric acid, to perform an ipso-electrophilic substitution.

Process for the dealkylating sulfonation of p-alkyl calixarenes

Foamed and cross-linked phenolic resin and method for making same

Growing community of inventors

Cologny, Switzerland

Philippe Choquard