Non-silicone surfactants for polyurethane or...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/10 (2006.01) C07C 17/08 (2006.01) C08G 18/40 (2006.01) C08J 9/04 (2006.01)

Patent

CA 2702022

The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to open-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a surfactant component which comprises a non-silicone surfactant and is substantially absent of a silicone surfactant, and a tertiary amine catalyst.

L'invention porte sur des mousses de polyuréthane et de polyisocyanurate et sur des procédés de préparation de celles-ci. Plus particulièrement, l'invention porte sur des mousses à cellules ouvertes, de polyuréthane et de polyisocyanurate, et sur des procédés permettant de les préparer. Les mousses sont caractérisées par une structure de cellules uniformes fines et par un affaissement de mousse faible ou nulle. Les mousses sont obtenues avec une composition de pré-mélange de polyol qui comprend une combinaison d'un agent gonflant hydroalooléfine, d'un polyol, d'un composant tensio-actif qui comprend un agent tensio-actif non silicone et est sensiblement exempt d'un agent tensio-actif silicone, et d'un catalyseur amine tertiaire.

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