| abstract |
The present invention provides polyurethane and polyisocyanurate foam materials and a process for producing the same. More specifically, the present invention relates to open-cell polyurethane and polyisocyanurate foam materials and methods of making the same. The foams are characterized by a fine, uniform cell structure and little or no bubble collapse. The foams are made from a polyol premix composition comprising a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant and an amine and an organic acid addition catalyst. |