B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 20/32 (2006.01) C03C 17/30 (2006.01) C07C 17/30 (2006.01) D06M 13/188 (2006.01) D21H 21/16 (2006.01)
Patent
CA 2301073
The invention concerns a method for treating a solid material whereof the chemical structure defines the reactive protogenous hydrophilic functions accessible to gases by applying at least a gas stream (3) on at least a micro-dispersion (5) of at least a grafting reagent RX produced on the solid material, R being a hydrophobic group, X being selected such that HX is volatile in normal conditions, R and X being selected such that the reaction of RX on the hydrophilic functions produces the covalent grafting of the hydrophobic groups R with formation of the compound HX, the reaction capable of being carried out in heterogeneous solid gas medium on all the reactive hydrophilic functions accessible to gases and only thereon. The invention also concerns the resulting hydrophobic solid material, and is useful for obtaining natural or artificial fibrous or mineral structures impermeable to water and to aqueous solutions and/or absorbing fats.
On traite un matériau solide dont la structure chimique définit les fonctions hydrophiles protogènes réactives accessibles aux gaz en appliquant au moins un courant gazeux (3) sur au moins une microdispersion (5) d'au moins un réactif de greffage RX réalisée sur le matériau solide, R étant un groupement hydrophobe, X étant choisi de façon que HX soit volatil dans des conditions normales, R et X étant choisis pour que la réaction de RX sur les fonctions hydrophiles produise le greffage covalent des groupements hydrophobes R avec formation du composé HX, la réaction pouvant s'effectuer en milieu hétérogène solide gaz sur toutes les fonctions hydrophiles réactives accessibles aux gaz et uniquement sur celles-ci. L'invention s'étend au matériau solide hydrophobe obtenu, et est applicable à l'obtention de structures fibreuses ou minérales naturelles ou artificielles imperméables à l'eau et aux solutions aqueuses et/ou absorbant les corps gras.
Mcfadden Fincham
Samain Daniel
LandOfFree
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