Patent ID: 7666919

Claim:
A method of making a flexible molded polyurethane foam, the method comprising combining in a mold a flexible polyurethane foam reaction mixture comprising (a) an ester-free polyol component consisting of 20-100 wt % polyether polyol and 0-80 wt % graft and/or polyurea modified co-polyols, (b) an organic polyisocyanate, (c) a non-fugitive tertiary amine urethane catalyst having an isocyanate reactive group, and (d) an aromatic diacid ester diol according to formula (I) wherein each R is H; each Z is independently selected from the group of divalent radicals consisting of CH(CH 3 )CH 2 , (CH 2 ) m wherein m is an integer from 2 to 6, polyethylene glycol moieties, polypropylene glycol moieties, and ethylene glycol-propylene glycol copolymer moieties; each A is a difunctional aromatic radical; and n is a number having a value from 1 to 100; wherein the ratio of equivalents of ester groups in the aromatic diacid ester diol to tertiary amine equivalents in the non-fugitive catalyst is in a range of 0.1:1 to 5:1 and the ratio of hydroxyl equivalents in the aromatic diacid ester diol to hydroxyl equivalents in the polyol component is greater than 0 and less than 1.5.