POLYMER POLYOL DISPERSANTS FROM POLYMERS CONTAINING ANHYDRIDE GROUPS

摘要

POLYMER POLYOL DISPERSANTS FROM POLYMERS CONTAINING ANHYDRIDE GROUPS Dispersants that are the reaction product of polyoxyalkylene polyether polyols with polymers containing anhydride groups are discussed. These dispersants may be used in the production of polymer polyols having high styrene contents and high solids contents. The polymers containing the anhydride groups may be preformed polymers which are then reacted with the polyol, or may be formed in the polyol directly prior to esterification with the polyol to form the dispersants. Maleic anhydride and methacrylic anhydride and derivatives thereof are examples of monomers suitable for the dispersants. Polymer polyols made using these dispersants may be reacted with polyisocyanates to produce polyurethanes. :