BLOWING AGENTS, FOAM PREMIXES AND FOAMS CONTAINING HALOGENATED OLEFIN BLOWING AGENT AND ABSORBENT

摘要

The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to closed-celled, polyurethane and polyisocyanurate foams and methods for their preparation. Preferably, the foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a catalyst and an absorbent material.