METHOD FOR MIXING BLOWING AGENTS WITH POLYURETHANE REAGENTS FOR THE PRODUCTION OF POLYURETHANE FOAM BOARDS

摘要

A method for manufacturing polyurethane and polyisocyanurate foams comprisingthe steps of charging at least one blowing agent and a polyol component to anin-line continuous mixer, wherein the at least one blowing agent and thepolyol component are continuously charged in separate streams advanced atpredetermined flow rates chosen to bring about a desired ratio of blowingagent to polyol component within the in-line continuous mixer.