C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/30 (2006.01) C08G 77/46 (2006.01) C08J 9/00 (2006.01) C08L 75/04 (2006.01)
Patent
CA 2204026
It has now been found that the use of inert gases as an auxiliary blowing agent in flexible polyurethane foams places unexpected requirements on the composition of the silicone surfactants used in such foams. Typical silicone polyalkylene oxide polyether copolymer comb-type surfactants containing greater than about 37 % ethylene oxide in the pendant polyether chains cause large cells when added inert gas is used as the blowing agent.
Il s'est avéré qu'en utilisant des gaz inertes comme agents de soufflage auxiliaires dans des mousses de polyuréthane, on se trouve face à des impératifs inattendus en ce qui concerne la composition de tensioactifs à la silicone utilisés dans ces mousses. Des tensioactifs à la silicone copolymères de type peigne oxyde de polyalkylène-polyéther typiques renfermant plus d'environ 37 % d'oxyde d'éthylène dans les chaînes de polyéther libres entraînent la formation d'alvéoles importants lorsque le gaz inerte ajouté est utilisé comme agent de soufflage.
Gerkin Richard M.
Harakal Mark E.
Lawler Lee F.
Miller Glenn A.
Company General Electric
Mcfadden Fincham
Osi Specialties Inc.
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