Hybrid polyols of PHD / PMPO for polyurethane foam applications

摘要

A stable, low viscosity hybrid polymer polyol comprising the free radical polymerization product of: (A) a base polyol component comprising: (1) from 10 to 100% by weight of a polymer modified polyol selected among the group consisting of: (a) one or more dispersions of a polyurea and / or polyhydrazodicarbonamide in a hydroxyl group-containing compound and (b) one or more polyisocyanate polyaddition polyols; and (2) from 0 to 99% by weight of a polyol having a functionality of 2 to 6 and an OH number of 20 to 500; wherein the sum of the percentages by weight of (A) (1) and (A) (2) totalizes 100% by weight of the component (A); (B) optionally, a preformed stabilizer; and (C) one or more ethylenically unsaturated monomers; in the presence of: (D) a free radical polymerization initiator; and (E) optionally, a polymer control agent; wherein the solids content of the hybrid polymer polyol ranges from 20 to 70% by weight and comprises (i) from 1% to 60% by weight of polyureas and / or polyhydrazodicarbonamides or polyisocyanate polyaddition products and (ii) of the 40% to 99% by weight of graft copolymers comprising the ethylenically unsaturated monomers, totaling the sum of the percentages by weight of (i) and (ii) 100% by weight of the solids of the hybrid polymer polyol.