New polyether polyols, poly formulation containing these polyether polyols and their use in the production of hard polyurethane foams

摘要

Polyol formulations containing 40 to 80 % wt. tertiary-amino-group containing polyether polyols with an OH number from 300 to 500, preferably 350 to 420, obtainable by the addition of solely propylene oxide with o-toluylene diamine, containing cyclopentane and/or n and/or i-pentane and/or hydrofluoroalkane as expanding agents, are used for the production of hard polyurethane foams by reaction with organic polyisocyanates, possibly other compounds with at least two hydrogen atoms reactive to isocyamates, possibly in the presence of water and other porior are expanding agents and the usual auxiliaries and additives.