Patent ID: 8258198

Claim:
A composition for use in making a polyurethane foam, the composition comprising: (a) a catalyst combination comprising (i) a gelling catalyst comprising a compound selected from the group consisting of triethylenediamine, 3-dimethylaminopropyl urea, N,N′-bis(3-dimethylamino-propyl)urea, 1-(N-methyl-3-pyrrolidino)methyl urea, 1,3-bis(N-methyl-3-pyrrolidino)methyl urea, and a combination of these; (ii) a trimerization catalyst comprising a compound selected from the group consisting of TEDA propylene oxide 2-ethylhexanoic acid quat; 1,8-diazabicyclo[5.4.0]undec-7-ene, either alone or blocked with a phenol or a carboxylic acid; N-hydroxyalkyl quaternary ammonium carboxylate salts; N,N′,N″-tris(dimethylaminopropyl)hexahydrotriazine; alkali metal carboxylates and a combinations of any of these; and (iii) a blowing catalyst comprising a compound selected from the group consisting of pentamethyldiethylenetriamine, permethylated triethylenetetramine, bis(dimethylaminoethyl)ether, 2-[N-(dimethylaminoethoxyethyl)-N-methylamino]ethanol; dimethylaminoethoxyethanol; N,N,N′-trimethyl-N′-3-aminopropyl-bis(aminoethyl) ether; N,N,N′-trimethyl-N′-aminopropyl-bis(aminoethyl) ether and a combination of these; (b) one or more cure accelerators selected from the group consisting of glycerol, trimethylol propane, diglycerol, pentaerythritol, dipentaerythritol, and a combination of these; and (c) at least one blowing agent wherein the gelling catalyst, the trimerization catalyst, the blowing catalyst and the cure accelerator are present in the amounts as shown in wt % based on the total of the catalyst combination and the one or more cure accelerators: gelling catalyst 14-35 trimerization catalyst 1.4-6 blowing catalyst 0.8-4 cure accelerator 55-83.8.