| 摘要 |
Polyether polyols and polyurethane foams are stabilized by including therein a stabilizer composition of (a) tetrakis[methylene-(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane and (b) a reaction product of diphenylamine and diisobutylene wherein the molar ratio of the amine to the diisobutylene is 1:1.1 to 1:2.5. The stabilizer composition may contain a third synergistic component, phenothiazine or certain alkyl derivatives of phenothiazine. The stabilizer composition may further contain trihydrocarbyl phosphite to stabilize the color of same. |
