| abstract |
The polyol premix composition comprises a blowing agent comprising a halogenated hydroolefin, a polyol, a catalyst composition, and an antioxidant. The antioxidant may be, for example, benzene diol or benzene triol, or other polyhydroxy-substituted aromatic compound optionally substituted by one or more substituents such as an alkyl group. A two-part system for producing a thermosetting foam formulation comprises: (a) a polyisocyanate, and optionally one or more isocyanate miscible raw materials; And (b) a polyol premix composition. A method of making a thermosetting foam formulation includes combining (a) a polyisocyanate and (b) a polyol premix composition. |