Elastomeric film, method for preparing same, and uses thereof

Details Elastomeric film, method for preparing same, and uses thereof Elastomeric film, method for preparing same, and uses thereof

C - Chemistry, Metallurgy

08

J

C08J 3/09 (2006.01) A01N 25/04 (2006.01) A61B 19/04 (2006.01) A61F 6/04 (2006.01) A61L 15/44 (2006.01) C08J 3/215 (2006.01) C08J 5/18 (2006.01) C08K 5/00 (2006.01) C08L 21/00 (2006.01) C08L 51/00 (2006.01) C08L 53/00 (2006.01)

Patent

CA 2156267

Elastomeric films containing uniformly dispersed liquid droplets of active chemical ingredients such as anti-corrosive agents, lubricants or drugs such as biocides, a preparation method therefor, and uses thereof, are disclosed. Stable emulsions comprising a continuous phase consisting of a solution of an elastomer in an organic solvent, and a dispersed phase including at least one active chemical ingredient in a solvent which is non-miscible with the elastomer solution, said emulsions being convertible into elastomeric films, and a preparation method therefor are also disclosed. Said elastomeric film includes dispersed droplets of a solvent (b) which is non-miscible with the elastomer and loaded with at least one active chemical ingredient, the resulting dispersion being stabilised by means of a block or graft copolymer comprising poly B sequences which are miscible with said droplets, and poly A sequences which are not miscible therewith.

Films d'élastomère, dans lesquels sont dispersées uniformément, sous la forme de gouttelettes de liquide, des substances chimiques actives, telles que des anti-corrosifs, des lubrifiants ou encore des médicaments tels que des biocides, leur procédé de préparation ainsi que leurs applications. Emulsions stables comportant une phase continue formée d'une solution d'élastomère dans un solvant organique et une phase dispersée comprenant au moins une substance chimique active dans un solvant non miscible avec la solution d'élastomère, aptes à être transformées en films d'élastomère, et leur procédé de préparation. Ledit film d'élastomère inclut une dispersion de gouttelettes d'un solvant <u>b</u> non miscible avec l'élastomère, chargé en au moins une substance chimique active, laquelle dispersion est stabilisée par un copolymère bloc ou greffé, comportant des séquences poly B, miscibles avec lesdites gouttelettes et des séquences poly A, non-miscibles avec ces gouttelettes.

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