Manufacture of polyurethanes from bark

Details Manufacture of polyurethanes from bark Manufacture of polyurethanes from bark

1976-04-20

1977-06-28

Cockeram, H.S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

106122, 260 25A, 260 25AK, 260 25AS, 260 9, C08G 1814, C08G 1800, C08H 504, C08L 9900

Patent

active

040324834

ABSTRACT:
Polyurethane compositions formed by the reaction of polyisocyanate with bark and/or bark components such as tannins, as the source of polyol. Mixtures of bark material with conventional polyols, with the bark material comprising at least 30% by weight, may also be used. Polyurethane foams prepared by this process possess a high degree of thermal stability and are fire-retardant.

REFERENCES:
patent: 1455762 (1923-05-01), Howard
patent: 3256218 (1966-06-01), Knox
patent: 3406127 (1958-10-01), Alexander
patent: 3549472 (1970-12-01), King et al.
patent: 3654194 (1972-04-01), Christian et al.

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