Isocyanate-reactive compositions that include a hydrofluoroolefin blowing agent, polyurethane foam-forming compositions, as well as spray-applied polyurethane foams formed therefrom that can provide structural support to wall structures and can also exhibit ASTM E84-16 Class A flame spread and smoke development characteristics at a foam thickness of 4 inches.

What is described is a composition for production of rigid polyurethane foam, comprising at least one isocyanate component, a polyol component, optionally a foam stabilizer, optionally blowing agent, wherein the composition contains at least one catalyst that catalyses the formation of a urethane or isocyanurate bond, wherein the catalyst comprises salts of amino acid derivatives.

Disclosed are HCFO-containing isocyanate-reactive compositions, polyurethane foam-forming compositions containing such isocyanate-reactive compositions, rigid polyurethane foams made using such polyurethane foam-forming compositions, and methods for producing such foams, including use of such foams as insulation in the construction of refrigerated storage devices. The isocyanate-reactive composition can exhibit a long shelf life, be shelf-stable, and produce a foam with good thermal insulation properties.

Described herein is a method for the preparation of a rigid polyisocyanate based foam, including mixing (a) polyisocyanate, (b) at least one compound having at least two hydrogen atoms reactive towards isocyanates, (c) optionally flame retardant, (d) blowing agent, (e) catalyst and (f) optionally further additives, to form a reaction mixture and reacting the reaction mixture to obtain the polyurethane based rigid foam where the compound reactive towards isocyanates (b) includes an aromatic polyetherpolyol (b2) and at least one compound selected from the group consisting of an aromatic polyesterpolyol (b1) and a polyetherpolyol (b3) different from polyether (b2). Also described herein is a rigid polyisocyanate based foam obtained from such a method and a polyol component for the production of a polyisocyanate based foam.

Provided is a polyol-containing composition capable of preventing a polyurethane foam from hydrolyzing and having a good foaming property, a foamable polyurethane composition, and a polyurethane foam. The polyol-containing composition for obtaining a polyurethane foam by reacting with a polyisocyanate, the polyol-containing composition comprising a polyol, a catalyst, a foaming agent, and a filler, a content of the filler in the polyol-containing composition being 8 mass % or more, the catalyst comprising a metal catalyst containing at least one selected from the group consisting of bismuth and tin.

This invention relates to rigid polyurethane foams which are co-blown with a mixture of a hydrocarbon blowing agent and a halogenated olefin blowing agent. This invention also relates to a process for preparing these rigid polyurethane foams, and to an isocyanate-reactive component containing a polyol blend and the mixture of blowing agents. Phase stable isocyanate-reactive blends are also described.

Polyurethane-polyisocyanurate foams are prepared using a polyether polyol made from an alkylene oxide mixture that contains a specified proportion of ethylene oxide. The selection of proper polyol equivalent weight and ethylene oxide content leads to the production of foams having a useful combination of properties.

Inorganic infrared attenuation agent blends have been developed to improve the thermal insulation properties of polymeric foams such as polystyrene low density foams. The inorganic infrared attenuation agent blends can include two or more metal oxides such as silicon dioxide, manganese (IV) oxide, iron (III) oxide, magnesium oxide, bismuth (III) oxide, cobalt oxide, zirconium (IV) oxide, molybdenum (III) oxide, titanium oxide, and calcium oxide. In some preferred embodiments, the inorganic infrared attenuation agent blends can include four or more of these metal oxides.

This disclosure generally provides tris (hydroxymethyl) phosphine oxide based polyfunctional polyester polyol compounds and resin compositions made therefrom which have improved flammability, wherein the resin composition comprising: (a) a polyfunctional isocyanate; (b) an isocyanate reactive composition comprising (b1) a polyfunctional polyol composition and a catalyst composition; and optionally (b2) a polyfunctional amine; wherein the polyfunctional polyol composition comprises tris (hydroxymethyl) phosphine oxide based polyfunctional polyester polyol compound.

The present disclosure relates to acid-blocked pyrrolidine catalysts for use in a polyurethane formulation. The polyurethane formulation includes the acid-blocked pyrrolidine catalyst, a compound containing an isocyanate functional group, an active hydrogen-containing compound and a halogenated olefin compound. The use of such acid-blocked pyrrolidine catalysts show surprisingly low reactivity with halogenated olefin compounds yet sufficient reactivity to catalyze polyurethane formation.