Storage-stable, blowing agent-containing emulsions for...

Details Storage-stable, blowing agent-containing emulsions for... Storage-stable, blowing agent-containing emulsions for...

C - Chemistry, Metallurgy

08

J

C08J 9/14 (2006.01) C08G 18/40 (2006.01) C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01) C08G 18/66 (2006.01)

Patent

CA 2245306

Storage-stable, blowing agent-containing halogen-free emulsions for producing rigid foams based on isocyanate comprise a) compounds containing hydrogen atoms which are reactive toward isocyanate groups, b) water, c) physically acting, halogen-free blowing agents and, if desired, d) auxiliaries and/or additives which are customary in polyurethane chemistry, wherein the component a) comprises polyether alcohols having a functionality of greater than 1.5 and a hydroxyl number of from 10 to 100 mg KOH/g in an amount of from 0.2% by mass to 80% by mass, based on the mass of the component a), and the halogen-free, physically acting blowing agents c) used are hydrocarbons having from 3 to 10 carbon atoms.

Divulgation d'émulsions entreposables, exemptes d'halogène et contenant des agents d'expansion, pour produire des mousses rigides à base d'isocyanate, comprenant : a) des composés renfermant des atomes d'hydrogène capables de réagir avec des groupements isocyanates, b) de l'eau, c) des agents d'expansion exempts d'halogène, physiquement actifs et, si on le désire, d) des auxiliaires et/ou des additifs habituellement utilisés en chimie des polyuréthanes. Dans ces émulsions, le composés a) renferme des polyéthers-alcools ayant une fonctionalité supérieure à 1,5 et un indice d'hydroxyle allant de 10 à 100 mg de KOH/g, en quantité allant de 0,2 à 80 %, par rapport au poids du composant a), et les agents d'expansion c), exempts d'halogène et physiquement actifs, utilisés sont des hydrocarbures en C3-C10.

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