Preparation of low-odor flexible polyurethane foams

Details Preparation of low-odor flexible polyurethane foams Preparation of low-odor flexible polyurethane foams

C - Chemistry, Metallurgy

08

G

C08G 18/48 (2006.01) C08G 18/09 (2006.01) C08G 18/10 (2006.01) C08G 18/20 (2006.01) C08G 18/22 (2006.01)

Patent

CA 2370341

Low-odor flexible polyurethane foams are prepared by reacting organic and/or modified organic polyisocyanate (a) with a polyetherol mixture (b) and, if required, further compounds (c) having hydrogen atoms reactive toward isocyanates, in the presence of water and/or other blowing agents (d), catalysts (e), flameproofing agents (f) and, if required, further assistants and additives (g), by a process in which the polyetherol mixture (e) consists of b1) at least one difunctional to octafunctional polyetherol based on ethylene oxide and, if required, propylene oxide and/or butylene oxide, having an ethylene oxide content of at least 30% by weight, based on the total amount of alkylene oxide used, and an OH number of from 20 to 200 mg KOH/g, and b2) at least one polyetherol based on propylene oxide and/or butylene oxide and, if required, ethylene oxide, having an OH number greater than 20 mg KOH/g, the ethylene oxide content being less than 30% by weight, based on the total amount of alkylene oxide used, and the foaming is effected in an index range of less than 150, the catalyst used comprising at least one catalyst supporting the polyisocyanurate reaction. The flexible polyurethane foams thus prepared are used as carpet, upholstery, seat and packaging material and in the hygiene sector.

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