C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/42 (2006.01) C08G 18/48 (2006.01) C08G 63/12 (2006.01) C08G 63/688 (2006.01) C08J 9/14 (2006.01)
Patent
CA 2274652
The present invention is a formulated polyether or polyester polyol blend that is useful for preparing polyurethane and polyisocyanurate foams. The formulated polyol blend of the present invention includes: a polyol that is derived from butylene oxide; and a hydrocarbon blowing agent such as pentane or cyclopentane, for example. Use of butylene oxide polyols of the present invention allow inclusion of a sufficient amount of a hydrocarbon blowing agent to produce foams having low density, without incorporating a higher concentration of water into a polyurethane foam formulation.
La présente invention concerne un mélange formulé de polyéther ou de polyester de polyol destiné à préparer des mousses de polyuréthanne et de polyisocyanurate. Le mélange de polyol formulé de la présente invention comprend un polyol dérivé du butylène oxyde et un hydrocarbure utilisé comme agent gonflant tel que le pentane ou le cyclopentane. L'utilisation de polyols de butylène oxyde permet d'inclure une quantité suffisante d'un agent gonflant hydrocarbure pour la production de mousses basse densité, sans avoir à relever la teneur en eau de la formulation de mousse de polyuréthanne.
Bhattacharjee Debkumar
Latham Dwight David
Leigon C.r.
Nelson Gilbert L.
Smart & Biggar
The Dow Chemical Company
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