Esters containing bonded fluorocarbon and...

C - Chemistry – Metallurgy – 07 – C

Patent

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402/370, 403/38,

C07C 69/63 (2006.01) C07C 69/65 (2006.01) C07C 271/14 (2006.01) C08G 18/08 (2006.01) C08G 65/32 (2006.01) C08G 65/332 (2006.01) C08G 65/333 (2006.01) C08G 65/337 (2006.01) C08J 9/00 (2006.01) C08J 9/14 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2032575

Abstract of the Disclosure: Novel esters containing bonded fluorocarbon and oxypropylenealkylether groups and of the formula Image or Image where Rf is straight-chain or branched, partially fluorinated or perfluorinated alkyl of 2 to 10 carbon atoms, partially fluorinated or perfluorinated cycloalkyl of 4 to 8 carbon atoms, perfluorophenyl or perfluoroalkylphenyl where the perfluoroalkyl radical is of 1 to 6 carbon atoms, R is straight-chain or branched alkyl of 1 to 4 carbon atoms and n is an integer from 2 to 70, blowing agent-containing emulsions which have a long shelf life and contain at least one partially fluorinated or perfluorinated (cyclo)aliphatic hydrocarbon of 3 to 8 carbon atoms and/or sulfur hexafluoride, at least one unmodified or modified organic polyisocyanate or a relatively high molecular weight reactive hydrogen compound and at least one of the abovementioned carboxylic or carbamic esters, and the use of these emulsions for the preparation of cellular plastics by the polyisocyanate polyaddition method.

Nouveaux esters renfermant des groupes fluorocarbonés et oxypropylènealkyléthers, de formule Image ou Image , où Rf est un alkyle de 2 à 10 carbones, à chaîne droite ou ramifiée, partiellement fluoré ou perfluoré, un cycloalkyle de 4 à 8 atomes de carbone, partiellement fluoré ou perfluoré, un perfluorophényle ou un perfluoroalkylphényle, où le radical perfluoroalkyle compte 1 à 6 carbones, R est un alkyle à chaîne droite ou ramifiée, de 1 à 4 carbones, et n est un entier de 2 à 70; émulsions à base de gonflant, à longue durée de vie, renfermant au moins un composé (cyclo)aliphatique de 3 à 8 carbones, partiellement fluoré ou perfluoré, et (ou) un hexafluorure de soufre, au moins un polyisocyanate organique, modifié ou non, ou un composé hydrogéné réactif de masse molaire relativement élevée, et au moins l'un des esters carboxyliques ou carbamiques mentionnés ci-dessus; utilisation de ces émulsions pour la préparation de plastiques cellulaires par la méthode de polyaddition de polyisocyanates.

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