Abstract: In a method of producing a thermosetting foam, a first of two foam forming blends ("A-Blend") is prepared using a multi-functional isocyanate such as polymeric polymethylene polyphenylisocyanate ("PMDI"). A second of two foam forming blends ("B-Blend") is prepared by mixing together a polyol; water; a tertiary amine catalyst having at least two hydrogen bonding sites for one molecule; and, an alkali metal organo-salt catalyst. The tertiary amine catalyst is of a type wherein both the hydrogen segment and the hydroxyl segment of water are attracted by both of the hydrogen bonding cites on the catalyst molecule essentially simultaneously. A first blowing agent is included with one of the two foam forming blends. When the first and second foam forming blends are mixed together, the tertiary amine catalyst quickly initiates a reaction predominately of the polymeric polymethylene polyphenylisocyanate with water (as opposed to a reaction with the polyol).

Abstract: In a method of producing a thermosetting foam, a first of two foam forming blends ("A-Blend") is prepared using a multi-functional isocyanate such as polymeric polymethylene polyphenylisocyanate ("PMDI"). A second of two foam forming blends ("B-Blend") is prepared by mixing together a polyol; water; a tertiary amine catalyst having at least two hydrogen bonding sites for one molecule; and, an alkali metal organo-salt catalyst. The tertiary amine catalyst is of a type wherein both the hydrogen segment and the hydroxyl segment of water are attracted by both of the hydrogen bonding cites on the catalyst molecule essentially simultaneously. A first blowing agent is included with one of the two foam forming blends. When the first and second foam forming blends are mixed together, the tertiary amine catalyst quickly initiates a reaction predominately of the polymeric polymethylene polyphenylisocyanate with water (as opposed to a reaction with the polyol).

Abstract: In a method of producing a thermosetting foam, a first of two foam forming blends ("A Blend") is prepared using polymeric polymethylene polyphenylisocyanate ("PMDI"). A second of two foam forming blends ("B Blend") is prepared by mixing together a polyol; water; a tertiary amine catalyst having at least one ethyl (--CH.sub.2 --CH.sub.2 --) linkage between two heteroatoms, the heteroatoms being chosen from the group consisting of Nitrogen and Oxygen; and, an alkali metal organo-salt catalyst. A first blowing agent is included with one of the two foam forming blends. When the first and second foam forming blends are mixed together, the tertiary amine catalyst quickly initiates a reaction predominately of the polymeric polymethylene polyphenylisocyanate with water (as opposed to a reaction with the polyol).