POLYURETHANE FOAM PREMIXES CONTAINING HALOGENATED OLEFIN BLOWING AGENTS AND FOAMS MADE FROM SAME

摘要

Disclosed are polyol premix compositions, and foams formed therefrom, which comprise a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a catalyst system that includes a bismuth-based metal catalyst. Such catalysts may be used alone or in combination with an amine catalyst and/or other non-amine catalysts.

主权项

1. A polyol premix having improved front-end reactivity comprising: (a) at least one polyol; (b) at least one hydrohaloolefin blowing agent comprising a tetrafluoropropene, a chlorotrifluoropropene, and/or a hexafluorobutene; (c) at least one surfactant; and (d) at least one bismuth-based metal catalyst, wherein said polyol premix has a cream time of less than about 10 seconds.