Stabilized polyoxyalkylene polyether polyol
AssigneeBASF Wyandotte Corporation
InventorsRichard A. Moore, Robert J. Hartman, William W. Levis, Jr., Ralph E. Bloom
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Abstract
Synergistic stabilizer combinations consisting of phenols such as 2,6,-di-t-butyl-4-methylphenol, amines such as 4,4'-bis(alpha,alpha- dimethylbenzyl)diphenylamine and p,p'-di-octyldiphenylamine, and phosphites such as phenyldidecylphosphite with 3,5-di-t-butyl-4-hydroxyhydrocinnamic acid triester of 1,3,5-tris(2-hydroxyethyl)-s-triazine-2,4,6-(1H,3H,5H-trione are employed as oxidative stabilizers for polyoxyalkylene polyether polyols and for the prevention of scorch in polyurethane foams prepared therefrom.
Claims8
A polyoxyalkylene polyether polyol containing an effective amount of a stabilizer composition containing
- a. from about 20 to about 95 weight percent of a stabilizer selected from the group consisting of 2,6-di-t-butyl-4-methylphenol, 4,4'-bis(alpha,alpha-dimethylbenzyl)diphenylamine, p,p'-dioctyldiphenylamine, phenyldidecylphosphite, and mixtures therefrom, and
- b. from about 5 to about 80 weight percent of 3,5-di-t-butyl-4-hydroxyhydrocinnamic acid triester of 1,3,5-tris(2-hydroxyethyl)-s-triazine-2,4,6(1H,3H,5H)-trione.
A polyurethane foam prepared by the reaction of an organic polyisocyanate with a polyoxyalkylene polyether polyol in the presence of a blowing agent, said polyol stabilized against oxidation with an effective amount of a stabilizer composition containing
- a. from about 20 to about 95 weight percent of a stabilizer selected from the group consisting of 2,6-di-b-butyl-4-methylphenol, 4,4'-bis-t-(alpha,alpha-dimethylbenzene)diphenylamine, p,p'-dioctyldiphenylamine, phenyldidecylphosphite, and mixtures thereof, and
- b. from about 5 to about 80 weight percent of 3,5-di-t-butyl-4-hydroxyhydrocinnamic acid triester of 1,3,5-tris(hydroxyethyl)-s-triazine-2,4,6(1H,3H,5H)-trione.
Dependencies are inferred from the claim text.