Liquid purification or separation – Casing divided by membrane into sections having inlet – Energy recovery from treated liquid
Patent
1979-12-26
1981-08-18
Hart, Charles N.
Liquid purification or separation
Casing divided by membrane into sections having inlet
Energy recovery from treated liquid
2104931, 2104971, 422 48, 264257, 264261, 264277, 156291, 156292, 156296, 1563313, 260 18TN, 528 66, 528 80, 1563314, B01D 3100, B29C 2714
Patent
active
042845068
ABSTRACT:
The present invention is directed to improved separatory devices employing polyurethane forming compositions, such as hollow fiber separatory devices intended to be used in biomedical applications. The separatory device employs at least one separatory membrane, suitable for the intended end use application, which is secured, potted or sealed in a housing using a cured polyurethane composition. The improvement comprises utilizing as the potting agent a polyurethane composition comprising the reaction product of an NCO-terminated prepolymer and a hydroxy terminated lactone derived polyester. The lactone polyester comprises the reaction product of a lactone such as caprolactone, and a polyol such as 1,6-hexane diol. The lactone derived polyester imparts to the polyurethane-forming composition a desirable balance of properties, including low mix viscosity, high reactivity, i.e., low gel and demold times, and acceptable hardness values, when used as a potting agent in biomedical separatory devices.
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patent: 2977385 (1961-03-01), Fowler et al.
patent: 3660375 (1972-05-01), Kolycheck et al.
patent: 3962094 (1976-06-01), Davis et al.
patent: 4165287 (1979-08-01), Goyne
patent: 4170559 (1979-10-01), Kropunski et al.
Case Barton C.
Tetenbaum Marvin T.
Hart Charles N.
Nath Gary M.
NL Industries Inc.
Sadowski David R.
Striffler Eugene
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