Stabilized polyoxyalkylene polyether polyols and polyurethane fo

Details Stabilized polyoxyalkylene polyether polyols and polyurethane fo Stabilized polyoxyalkylene polyether polyols and polyurethane fo

1983-04-01

1984-04-24

Kight, III, John

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

521117, 521121, 521128, 521130, 521166, 524291, 524352, 524353, 524258, 524 83, 568582, 252403, C08G 1814, C07L 4112

Patent

active

044446764

ABSTRACT:
Polyoxyalkylene polyether polyols are stabilized against oxidative degradation by incorporating therein a synergistic stabilizing composition containing (1) a mixture of butylated phenols consisting of 2-tertiary butyl phenol, 3,5-ditertiary butyl-4-hydroxyhydrocinnamate and 1,6-hexamethylene bis(3,5-ditertiary-butyl-4-hydroxyhydrocinnamate) or tetrakis [methylene(3,5-ditertiary butyl-4-hydroxyhydrocinnamate)] methane (2) a p,p'-dialkyldiphenylamine such as p,p'-dioctyldiphenylamine and (3) a phenothiazine compound. Polyurethane foams are stabilized against scorching when the stabilized polyols are utilized in the foam preparation or the stabilizing composition is added with other reactants.

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patent: 4228247 (1980-10-01), Moore et al.
patent: 4265783 (1981-05-01), Hinze
patent: 4363745 (1982-12-01), Hinze

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