Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Organic polymerization
Patent
1989-01-13
1991-10-08
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Organic polymerization
239112, 422131, 417394, 425 4R, 425 4C, 521133, 521917, 261DIG26, C08F29900
Patent
active
050552724
ABSTRACT:
A method of producing a polyurethane foam comprising the steps of dissolving rapidly and substantially completely a non-condensible non-reactive gas in a liquid isocyanate component or a liquid polyol component or both while the isocyanate and polyol components are maintained separate from one another, while controlling the flow of the non-reactive gas to maintain a predetermined dissolved gas to liquid ratio, and while maintaining the component in which the nucleating agent is being dissolved under pressure sufficient to maintain the gas in solution and to hold substantially constant the dissolved gas to liquid ratio and mixing the previously separated isocyanate and polyol components together while reducing the pressure to nucleate the dissolved gas in the isocyanate and polyol components and while impinging liquid streams of the composition together thereby enhancing mixing and permitting the mixture to foam so as to form a fine celled polyurethane foam. An apparatus for producing the same is also provided.
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Bertram George T.
Schulman Edward H.
Wheeler Robert D.
Wierzbicki Ronald J.
McMahon Timothy M.
Sealed Air Corporation
Warden Robert J.
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