Stability of polyurethane polyol blends containing halogenated olefin blowing agents

11-14. (canceled)

A method for stabilizing a thermosetting foam blend which comprises combining:

• (a) a polyisocyanate and, optionally, one or more isocyanate compatible raw materials;
• and (b) a polyol pre-mix composition which comprises a blowing agent, a polyol, a surfactant, and a catalyst composition comprising an oxygen-containing amine catalyst, wherein when the catalyst composition comprises more than one amine catalyst, the oxygen-containing amine catalyst comprises greater than 50 wt % of a total of the amine catalysts.

A polyurethane or polyisocyanurate foam having uniform cell structure with little or no foam collapse comprising a mixture of (a) a polyisocyanate and, optionally, one or more isocyanate-compatible raw materials;

• and (b) a polyol pre-mix composition which comprises a blowing agent, a polyol, a surfactant, and a catalyst composition comprising an oxygen-containing amine catalyst, wherein when the catalyst composition comprises more than one amine catalyst, the oxygen-containing amine catalyst comprises greater than 50 wt % of a total of the amine catalysts.

(canceled)

A stable polyol pre-mix composition comprising a blowing agent, a polyol, a surfactant, and a catalyst composition comprising an oxygen-containing amine catalyst, wherein when the catalyst composition comprises more than one amine catalyst, the oxygen-containing amine catalyst comprises less than 50 wt % of a total of the amine catalysts.

31-34. (canceled)

A method for stabilizing a thermosetting foam blend which comprises combining:

• (a) a polyisocyanate and, optionally, one or more isocyanate compatible raw materials;
• and (b) a polyol pre-mix composition which comprises a blowing agent, a polyol, a surfactant, and a catalyst composition comprising an oxygen containing amine catalyst, wherein when the catalyst composition comprises more than one amine catalyst, the oxygen-containing amine catalyst comprises less than 50 wt % of a total of the amine catalysts.

A polyurethane or polyisocyanurate foam having uniform cell structure with little or no foam collapse comprising a mixture of:

• (a) a polyisocyanate and, optionally, one or more isocyanate compatible raw materials;
• and (b) a polyol pre-mix composition which comprises a blowing agent, a polyol, a surfactant, and a catalyst composition comprising an oxygen-containing amine catalyst, wherein when the catalyst composition comprises more than one amine catalyst, the oxygen-containing amine catalyst comprises less than 50 wt % of a total of the amine catalysts.

(canceled)