Polyurethane foam free from internal discoloration

Details Polyurethane foam free from internal discoloration Polyurethane foam free from internal discoloration

1974-08-12

1976-01-06

Cockeram, H. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 458N, 260 458NZ, 260 458S, 260 4585H, 260 4585P, 260 775SS, C08G 1830, C08K 513, C08K 547

Patent

active

039310604

ABSTRACT:
Polyurethane foams which are free from the usual discoloration particularly in the center of a block thereof are prepared from a foamable reaction mixture containing
A. a heterocyclic mercapto compound of the formula ##SPC1##
In which
X = --o--, --s--, --nh--, --n--(c.sub.1 -c.sub.12)--alkyl, --N--(C.sub.5 -C.sub.6)--cycloalkyl--, --N--phenyl, --N--(C.sub.7 -C.sub.12)--aralkyl, --N--(C.sub.7 --C.sub.12)--alkylaryl-- or --N--CO--(C.sub.1 -C.sub.6)--alkyl, ##EQU1## ##SPC2## R = H, (C.sub.1 -C.sub.12)--alkyl, (C.sub.1 -C.sub.12)--alkoxycarbonyl--, (C.sub.1 -C.sub.12)--alkoxy and
B. a phenol of the general formula ##SPC3##
In which R.sup.1 and R.sup.3 may be the same or different and denote C.sub.1 -C.sub.9 --alkyl--, C.sub.5 -C.sub.6 --cycloalkyl--, C.sub.7 -C.sub.9 --alkylaryl--, indanyl or norbornyl groups and R.sup.2 = R.sup.1 or --CH.sub.2 --CH.sub.2 --COO--(C.sub.1 -C.sub.12)--alkyl.

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patent: 3635862 (1972-01-01), Dunn
patent: 3700750 (1972-10-01), Yamanonchi et al.
patent: 3703489 (1972-11-01), Morehouse
patent: 3715381 (1973-02-01), Spaunburgh et al.
patent: 3772218 (1973-11-01), Lamplugh et al.

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