Tropodegradable bromine-containing halocarbon additives to...

C - Chemistry – Metallurgy – 09 – K

Patent

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C09K 21/08 (2006.01) A01N 25/16 (2006.01) C08J 9/06 (2006.01) C09K 3/30 (2006.01) C09K 5/04 (2006.01)

Patent

CA 2266711

A set of tropodegradable chemical additives to decrease the flammability of normally flammable refrigerants, foam blowing agents, cleaning solvents, aerosol propellants, and sterilants is disclosed. The additives are characterized by high efficiency and short atmospheric lifetimes. The latter property is essential and results in a low ozone depletion potential (ODP) and a low global warming potential (GWP). The additives are bromine-containing alkenes, bromine-containing alcohols, bromine-containing ethers with at least one hydrogen atom adjacent to the oxygen atom, bromine-containing amines with at least one hydrogen atom adjacent to the nitrogen atom, bromine-containing carbonyl compounds, bromine-containing aromatics, and/or bromine-containing non-fluorinated alkanes.

L'invention concerne un ensemble d'additifs chimiques tropodégradables conçus pour réduire l'inflammabilité de réfrigérants, d'agents moussants gonflants, de solvants de nettoyage, de propulseurs pour aérosol et de stérilisants normalement inflammables. Les additifs sont caractérisés par une grande efficacité et une durée de vie limitée dans l'atmosphère. Cette dernière propriété est essentielle et résulte en un faible potentiel d'appauvrissement de l'ozone (ODP) et un faible potentiel de réchauffement du globe (GWP). Les additifs sont des alcènes contenant du brome, des alcools contenant du brome, des éthers contenant du brome avec au moins un atome d'hydrogène adjacent à l'atome d'oxygène, des amines contenant du brome avec au moins un atome d'hydrogène adjacent à l'atome d'azote, des composés carbonyles contenant du brome, des hydrocarbures aromatiques contenant du brome et/ou des alcanes non fluorés contenant du brome.

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