Heat-resistant polyurethane compositions

Details Heat-resistant polyurethane compositions Heat-resistant polyurethane compositions

1974-09-12

1976-03-23

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25BB, C08J 320

Patent

active

039459683

ABSTRACT:
Polyurethanes are rendered resistant to heat and oxidation by addition, as stabiliser, of a hydroxylic spiro-bis-indane of the formula: ##SPC1##
In which each of the R.sub.1 radicals which may be identical or different; represents a methyl or ethyl radical, and each of Z.sub.1, Z.sub.2, Z.sub.3, Z.sub.4, Z.sub.5 and Z.sub.6, which may be identical or different, represents a hydrogen atom, a hydroxyl group an alkyl radical, an alkoxy radical or a halogen atom.

REFERENCES:
patent: 2915496 (1959-12-01), Swart et al.
patent: 3265660 (1966-08-01), Burgess et al.
patent: 3386942 (1968-06-01), Bell et al.

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