Polyurethane foam and a microbiological metabolizing system

Details Polyurethane foam and a microbiological metabolizing system Polyurethane foam and a microbiological metabolizing system

1983-11-02

1985-03-05

Cockeram, Herbert S.

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

5 21, 5 21, 435174, 435182, C12P 100, C12N 1104, C08G 1814

Patent

active

045031509

ABSTRACT:
The present invention provides a polyurethane foam having significantly improved longevity in a microbiological process in which the foam functions as a support medium for microorganism in a water system containing nutrients for the microorganisms. Also provided is a method of making said improved foam and an improved microbiological metabolizing (e.g., digestion) process employing said improved foam. The present invention is based upon the discovery that enhanced foam life in such a watery, abrasive environment is substantially enhanced if the polyurethane foam formulation has a urea/urethane ratio of less than about 5 and preferably a urethane index of about 100.

REFERENCES:
patent: 2071591 (1937-02-01), Tholin
patent: 3293174 (1966-12-01), Robjohns
patent: 3779906 (1973-12-01), Levin
patent: 3929630 (1975-12-01), Smith
patent: 4005010 (1977-01-01), Lunt
patent: 4055490 (1977-10-01), Hasegawa et al.
patent: 4310424 (1982-01-01), Fremont et al.

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