Phosphobrominated polyether polyols, process for their preparation and use of these polyether polyols in the preparation of flame-resistant flexible polyurethane foams

摘要

Polyether phosphobromés comprising in their molecule oxyalkylene radicals bonded to phosphorus atoms étatde phosphate or phosphonate groups and 1,4-dioxy-2,3-dibromo-2-butényléniques in which the ratio between the total number of radicals oxyalkylene and the total number of phosphorus atoms is at least equal to 7.; These polyether polyols are used as flame retardants reactive additives in the manufacture of polyurethane flexible foam fire retardant to the intervention of polyether polyols with good comfort properties.