Isocyanate-reactive composition that include a polyol blend, a blowing agent composition, and a catalyst. The polyol blend includes a polyether polyol having a functionality of 2 to 6 and an OH number of 20 to 50 mg KOH/g, which is present in an amount of at least 30% by weight, based on total weight of the isocyanate-reactive composition, and an aromatic polyester polyol having a functionality of 1.5 to 3 and an OH number of 150 to 450 mg KOH/g, which is present in an amount of at least 40% by weight, based on total weight of the isocyanate-reactive composition. The blowing agent composition includes water, the water being present in an amount of 1 to 20% by weight, based on total weight of the isocyanate-reactive composition and in an amount of at least 90% by weight, based on total weight of the blowing agent composition. The isocyanate-reaction composition has a green content of at least 30% by weight, based on total weight of the isocyanate-reactive composition. Polyurethane foam-forming reaction mixtures, polyurethane foams, multi-layer composite articles and methods for their production are also described.

Isocyanate-reactive composition that include a polyol blend, a blowing agent composition, and a catalyst. The polyol blend includes a polyether polyol having a functionality of 2 to 6 and an OH number of 20 to 50 mg KOH/g, which is present in an amount of at least 30% by weight, based on total weight of the isocyanate-reactive composition, and an aromatic polyester polyol having a functionality of 1.5 to 3 and an OH number of 150 to 450 mg KOH/g, which is present in an amount of at least 40% by weight, based on total weight of the isocyanate-reactive composition. The blowing agent composition includes water, the water being present in an amount of 1 to 20% by weight, based on total weight of the isocyanate-reactive composition and in an amount of at least 90% by weight, based on total weight of the blowing agent composition. The isocyanate-reaction composition has a green content of at least 30% by weight, based on total weight of the isocyanate-reactive composition. Polyurethane foam-forming reaction mixtures, polyurethane foams, multi-layer composite articles and methods for their production are also described.

Hydrophilic polyurethane foam is made from a diphenylmethane-based quasi-prepolymer having specified isocyanate and oxyethylene contents. The foams have an unusually good capacity for retaining water even when under compressive forces. They also exhibit at most moderate swelling when saturated with water. The foam is useful as a layer of a water containment system such as a green roof or blue roof system.

Polyurethane foams which are highly flame resistant are described, as well as the production of such polyurethane foams by the reaction between a natural polyol, such as sucrose or a blend of mono- or disaccharides in place of the standard hydrocarbon-based polyol component, a polyisocyanate and water in the presence of a suitable polyurethane forming catalyst and a flame retardant, and optionally one or more components such as surfactants and/or emulsifiers. The resultant polyurethane foam has a bio-based solid content ranging from about 17% to 30%, may be formulated in a variety of foam densities for a variety of applications, and exhibits a high degree of fire and burn resistance, as exhibited by the flame spread index and the smoke spread values.

The invention relates to a method for preparing polyester polyols containing monools, and to their use, in particular for preparing polyurethane/polyisocyanurate rigid foams (also referred to hereafter as PUR/PIR rigid foams) with improved fire performance.

Hydrophilic polyurethane foam is made from a diphenylmethane-based quasi-prepolymer having specified isocyanate and oxyethylene contents. The foams have an unusually good capacity for retaining water even when under compressive forces. They also exhibit at most moderate swelling when saturated with water. The foam is useful as a layer of a water containment system such as a green roof or blue roof system.

This disclosure provides for new low density, open cell polyurethane (PUR) foams, which can be prepared using a combination of precursors and conditions, for example, an off-ratio A-side:B-side volume ratio (v:v) which includes a higher volume of A-side than the volume of B-side, an aromatic polyisocyanate component having an isocyanate functionality of from about 2.5 to about 3.0, and an Isocyanate Index of from about 20 percent to about 40 percent. Using the processes and precursors disclosed herein, polyurethane foams having a density of from about 0.25 lb/ft.sup.3 to about 0.45 lb/ft.sup.3 can be obtained.

The present invention relates to a rigid polyurethane foam and use thereof in automotive interiors. The polyurethane foam is prepared from a reaction system comprising the reaction components of polyisocyanate, polyether polyol, catalyst and water, in which the catalyst is N,N-dimethyl-N′,N′-di(2-hydroxypropyl)-1,3-propanediamine. The rigid polyurethane foam according to the present invention has a desired low odor, while ensuring good physical properties, such as good mechanical strength and tensile strength.

The invention relates to a process for producing polyurethane/polyisocyanurate rigid foams by reacting a specific reaction mixture in the presence of a catalyst component containing potassium formate and an amine, and to the polyurethane/polyisocyanurate rigid foams produced according to said method.

The invention relates to a process for producing polyurethane/polyisocyanurate rigid foams by reacting a specific reaction mixture in the presence of a catalyst component containing potassium formate and to the polyurethane/polyisocyanurate rigid foams produced according to said method.