Gas and liquid contact apparatus – Contact devices
Patent
1984-07-31
1985-10-22
Lieberman, Paul
Gas and liquid contact apparatus
Contact devices
261 1, 424 2, 424 9, 424 19, 424 22, 424 30, 424 31, 424 76, 424 84, 424DIG8, 424DIG10, 239 57, 252350, B01D 4704, C11D 348, C11D 350
Patent
active
045487642
ABSTRACT:
Described is the use of homopolymers of (epsilon caprolactone) defined according to the structure: ##STR1## and, optionally, ##STR2## as controlled release materials for physiological or psychological diagnostic compositions, pheremones, insect repellent compositions, animal repellent compositions, and/or aroma augmenting or enhancing media for use in perfume compositions or perfumed articles or colognes; wherein n represents an integer of from about 500 up to about 1,200 with the proviso that the average "n" varies from about 600 up to about 800. Also described are mixtures of such homopolymers with other polymers such as polyethylene, polypropylene, mixtures of polyethylene and polyvinyl acetate, copolymers of ethylene and vinyl acetate, and the like, useful for controlled release of such physiological or psychological diagnostic compositions, pheremones, insect repellents, animal repellents and perfume materials into a gaseous environment surrounding the polymer matrix. Also described are methods for blending such polycaprolactone homopolymers whereby a first amount of a liquified polycaprolactone is admixed in an extruder, for example, with a diagnostic material and/or scent imparting material and/or an animal repellent material and/or insect repellent material and/or a pheremone material. The solidified pellets may if desired, then be mixed in, for example, a second extruder with a second amount of unscented polycaprolactone or other polymer, e.g., polyolefin, the second amount of polymer being the same or somewhat larger then the first amount. The mixture thus obtained may again be solidified and, if desired, repelletized. The resulting pellets may, if desired, be formed into functional articles by means of, for example, injection molding.
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Munteanu Marina A.
Oltarzewski Edward S.
Shechter Leon
Warren Craig B.
International Flavors & Fragrances Inc.
Le Hoa Van
Liberman Arthur L.
Lieberman Paul
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